SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K Current Report Pursuant To Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): ~~July~~August 25, 2005 (Date of earliest event reported) Impac CMB Trust Series 2005-4 (as Issuer under the Indenture dated as May 6, 2005, providing for the issuance Trust Certificates, Series 2005-4) (Exact name of Registrant as specified in its Charter) California (State or Other Jurisdiction of Incorporation) 333-117817 33-0705301 (Commission File Number) (I.R.S. Employer Identification No.) 1401 DOVE STREET NEWPORT BEACH, CALIFORNIA 92660 (Address of principal executive offices) (Zip Code) Registrant's Telephone Number, Including Area Code: (949) 475-3600 (Former name or former address, if changed since last report.) Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below): [ ] Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) [ ] Soliciting material pursuant to Rule 14a-12(b) under the Exchange Act (17 CFR 240.14a-12(b)) [ ] Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) [ ] Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c)) Item 8.01 Other Events Attached hereto is a copy of the Monthly Remittance Statements to the Certificateholders which was derived from the monthly information submitted by the Master Servicer of the Trust to the Trustee. Item 9.01 Financial Statements and Exhibits (c) Exhibits: Exhibit No. Description 99.1 Monthly Remittance Statement to the Certificateholders dated as of ~~July~~August 25, 2005. Signatures Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized. Deutsche Bank National Trust Company, in its capacity as Indenture Trustee under the Indenture on behalf of Impac Assets Corp., Registrant Date: ~~Jul~~Aug 2726, 2005 By: /s/ Katherine M. Wannenmacher Katherine M. Wannenmacher Vice President EXHIBIT INDEX DOCUMENT 99.1 Monthly Remittance Statement to the Certificateholders dated as of ~~July~~August 25, 2005.

Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
				External Parties						Table of Contents
													Page
				Seller
										1. Certificate Payment Report					2
				Impac Funding Corporation
										2. Collection Account Report					6
										3. Credit Enhancement Report					8
										4. Collateral Report					9
				Certificate Insurer(s)						5. Delinquency Report					12
										6. REO Report					15
										7. Foreclosure Report					16
										8. Prepayment Report					17
										9. Prepayment Detail Report					20
										10. Realized Loss Report					25
										11. Realized Loss Detail Report					28
				Servicer(s)
										12. Triggers and Adj. Cert. Report					29
				Impac Funding Corp.
										13. Additional Certificate Report					30
										14. Other Related Information					31
				Underwriter(s)
				UBS Warburg, London
				Countrywide Funding Corporation
				Bear Stearns & Co.
										Total Number of Pages					31
				Dates						Contacts
				Cut-Off Date:			April 01, 2005			Marion Hogan
				Close Date:			May 06, 2005			Administrator
				First Distribution Date:			May 25, 2005			(714) 247-6282
										marion.c.hogan@db.com
										Address:
										1761 East St. Andrew Place, Santa Ana, CA 92705
				Distribution Date:			~~July~~August 25, 2005
										Factor Information:			(800) 735-7777
				Record Date:			~~June~~July 3029, 2005
										Main Phone Number:			(714) 247-6000
							July 22, 2005
							August 24, 2005
										https://www.tss.db.com/invr
Page 1 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Certificate Payment Report
Current Period Distribution -
					Prior												Current
	Class		Original		Principal						Total		Realized		Deferred		Principal
Class	Type	Cur	Face Value		Balance		Interest		Principal		Distribution		Loss		Interest		Balance
					(1)		(2)		(3)		(4)=(2)+(3)		(5)		(6)		(7)=(1)-(3)-(5)+(6)
1-A-1A		$	1,047,829,000.00		1987,~~018~~867,~~276,230~~962.6493		23,~~838~~172,~~802~~977.5202		3026,~~408~~556,~~267~~135.7135		3329,~~247~~729,~~070~~112.2337		0.00		0.00		~~987~~961,~~867~~311,~~962~~827.9358
1-A-1B		$	200,000,000.00		~~194~~188,~~359~~555,~~238~~186.1357		~~526~~605,~~727~~628.7978		5,~~804~~068,~~051~~791.5683		65,~~330~~674,~~779~~420.3561		0.00		0.00		~~188~~183,~~555~~486,~~186~~394.5774
1-A-2		$	138,648,000.00		~~134~~130,~~737~~713,~~598~~997.2454		~~382~~427,~~964~~725.0825		43,~~023~~513,~~600~~889.7025		43,~~406~~941,~~564~~614.7850		0.00		0.00		~~130~~127,~~713~~200,~~997~~108.5429
1-A-IO		$	0.00		0.00		~~843~~731,~~750~~250.00		0.00		~~843~~731,~~750~~250.00		0.00		0.00		0.00
2-A-1		$	62,027,000.00		61,~~692~~539,~~742~~641.7577		~~173~~199,~~429~~251.68		~~153~~363,~~100~~758.9827		~~326~~563,~~530~~009.6695		0.00		0.00		61,~~539~~175,~~641~~883.7750
2-A-2		$	13,336,000.00		13,~~264~~231,~~133~~216.6445		3843,~~113~~751.2522		3278,~~917~~209.1917		71121,~~030~~960.4439		0.00		0.00		13,~~231~~153,~~216~~007.4528
1-M-1		$	162,956,000.00		~~158~~153,~~360~~630,~~020~~994.0592		~~461~~514,~~191~~621.1816		4,~~729~~129,~~025~~950.1320		54,~~190~~644,~~216~~571.3136		0.00		0.00		~~153~~149,~~630~~501,~~994~~044.9272
1-M-2		$	84,629,000.00		8279,~~242~~786,~~139~~184.8242		~~241~~269,~~432~~322.4070		2,~~455~~144,~~955~~833.4092		2,~~697~~414,~~387~~156.8062		0.00		0.00		7977,~~786~~641,~~184~~350.4250
1-M-3		$	45,015,000.00		4342,~~745~~439,~~405~~058.5262		~~129~~143,~~100~~986.7629		1,~~306~~140,~~346~~858.9032		1,~~435~~284,~~447~~844.6661		0.00		0.00		4241,~~439~~298,~~058~~200.6230
1-M-4		$	27,009,000.00		2625,~~247~~463,~~243~~435.3218		8090,~~930~~119.9334		~~783~~684,~~808~~514.1499		~~864~~774,~~739~~634.0733		0.00		0.00		2524,~~463~~778,~~435~~920.1819
1-M-5		$	28,810,000.00		27,~~997~~161,~~448~~374.2663		8696,~~980~~830.7930		~~836~~730,~~073~~159.6346		~~923~~826,~~054~~989.4276		0.00		0.00		2726,~~161~~431,~~374~~215.6317
1-M-6		$	22,508,000.00		21,~~873~~220,~~188~~000.6670		6976,~~145~~928.1840		~~653~~570,~~187~~441.9683		~~722~~647,~~333~~370.1423		0.00		0.00		2120,~~220~~649,~~000~~558.7087
2-M-1		$	7,443,000.00		7,~~402~~384,~~890~~518.4289		2125,~~962~~181.4521		1843,~~371~~649.5358		4068,~~333~~830.9879		0.00		0.00		7,~~384~~340,~~518~~869.8931
2-M-2		$	11,165,000.00		11,~~104~~077,~~832~~274.9442		3540,~~104~~158.4320		2765,~~558~~477.5231		62105,~~662~~635.9551		0.00		0.00		11,~~077~~011,~~274~~797.4211
1-B-1		$	25,209,000.00		2423,~~498~~766,~~010~~438.1546		8797,~~922~~415.4399		~~731~~638,~~571~~895.6987		~~819~~736,~~494~~311.1286		0.00		0.00		23,~~766~~127,~~438~~542.4659
1-B-2		$	18,006,000.00		1716,~~498~~975,~~162~~623.2145		6876,~~924~~159.6025		~~522~~456,~~538~~343.7633		~~591~~532,~~463~~502.3658		0.00		0.00		16,~~975~~519,~~623~~280.4512
2-B-1		$	17,368,000.00		17,~~274~~231,~~405~~536.5923		6675,~~699~~823.6755		42101,~~869~~854.3690		~~109~~177,~~569~~678.0345		0.00		0.00		17,~~231~~129,~~536~~681.2333
2-B-2		$	10,358,000.00		10,~~302~~276,~~181~~615.8019		4656,~~716~~281.2560		2560,~~566~~744.6165		72117,~~282~~026.8625		0.00		0.00		10,~~276~~215,~~615~~870.1954
CERT		$	1,922,316,000.00		0.00		1,~~620~~116,~~496~~997.6842		0.00		1,~~620~~116,~~496~~997.6842		0.00		0.00		0.00
Total			3,844,632,000.00		1,~~870~~818,~~875~~321,~~872~~060.1437		7,~~820~~860,~~395~~409.0736		5246,~~554~~348,~~811~~508.7723		6054,~~375~~208,~~206~~917.8459		0.00		0.00		1,~~818~~771,~~321~~972,~~060~~552.3714
Page 2 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Interest Accrual Detail Current Period Factor Information per $1,000 of Original Face-
									Orig. Principal		Prior							Current
	Period		Period						(with Notional)		Principal						Total	Principal
Class	Starting		Ending		Method		Cusip		Balance		Balance		Interest		Principal		Distribution	Balance
									(1)		(1)		(2)		(3)		(4)=(2)+(3)	(5)
1-A-1A	0607/2725/05		0708/24/05		A-Act/360		45254NPA9		1,047,829,000.00		~~971~~942.~~796191~~775933		23.~~709223~~028144		2925.~~020258~~343959		3128.~~729481~~372103	~~942~~917.~~775933~~431974
1-A-1B	0607/2725/05		0708/24/05		A-Act/360		45254NPB7		200,000,000.00		~~971~~942.~~796191~~775933		23.~~633639~~028144		2925.~~020258~~343959		3128.~~653897~~372103	~~942~~917.~~775933~~431974
1-A-2	0607/2725/05		0708/24/05		A-Act/360		45254NPC5		138,648,000.00		~~971~~942.~~796191~~775933		23.~~762132~~084972		2925.~~020258~~343959		3128.~~782390~~428932	~~942~~917.~~775933~~431974
1-A-IO	0607/01/05		0607/30/05		F-30/360		45254NPD3		1,800,000,000.00		~~750~~650.000000		0.~~468750~~406250		0.000000		0.~~468750~~406250	~~650~~500.000000
2-A-1	0607/2725/05		0708/24/05		A-Act/360		45254NPE1		62,027,000.00		~~994~~992.~~611101~~142805		23.~~796035~~212338		25.~~468296~~864515		59.~~264331~~076853	~~992~~986.~~142805~~278290
2-A-2	0607/2725/05		0708/24/05		A-Act/360		45254NPF8		13,336,000.00		~~994~~992.~~611101~~142805		23.~~857922~~280685		25.~~468296~~864515		59.~~326218~~145200	~~992~~986.~~142805~~278290
1-M-1	0607/2725/05		0708/24/05		A-Act/360		45254NPG6		162,956,000.00		~~971~~942.~~796191~~775933		23.~~830158~~158038		2925.~~020258~~343959		3128.~~850416~~501997	~~942~~917.~~775933~~431974
1-M-2	0607/2725/05		0708/24/05		A-Act/360		45254NPH4		84,629,000.00		~~971~~942.~~796191~~775933		23.~~852833~~182393		2925.~~020258~~343959		3128.~~873091~~526352	~~942~~917.~~775933~~431974
1-M-3	0607/2725/05		0708/24/05		A-Act/360		45254NPJ0		45,015,000.00		~~971~~942.~~796191~~775933		23.~~867950~~198629		2925.~~020258~~343959		3128.~~888207~~542588	~~942~~917.~~775933~~431974
1-M-4	0607/2725/05		0708/24/05		A-Act/360		45254NPK7		27,009,000.00		~~971~~942.~~796191~~775933		23.~~996443~~336641		2925.~~020258~~343959		3228.~~016701~~680600	~~942~~917.~~775933~~431974
1-M-5	0607/2725/05		0708/24/05		A-Act/360		45254NPL5		28,810,000.00		~~971~~942.~~796191~~775933		3.~~019118~~360996		2925.~~020258~~343959		3228.~~039376~~704955	~~942~~917.~~775933~~431974
1-M-6	0607/2725/05		0708/24/05		A-Act/360		45254NPM3		22,508,000.00		~~971~~942.~~796191~~775933		3.~~072027~~417825		2925.~~020258~~343959		3228.~~092285~~761784	~~942~~917.~~775933~~431974
2-M-1	0607/2725/05		0708/24/05		A-Act/360		45254NPN1		7,443,000.00		~~994~~992.~~611100~~142804		23.~~950752~~383207		25.~~468296~~864514		59.~~419049~~247721	~~992~~986.~~142804~~278290
2-M-2	0607/2725/05		0708/24/05		A-Act/360		45254NPP6		11,165,000.00		~~994~~992.~~611101~~142805		3.~~144150~~596794		25.~~468296~~864515		59.~~612445~~461309	~~992~~986.~~142805~~278290
1-B-1	0607/2725/05		0708/24/05		A-Act/360		45254NPQ4		25,209,000.00		~~971~~942.~~796190~~775932		3.~~487740~~864334		2925.~~020258~~343959		3229.~~507998~~208293	~~942~~917.~~775932~~431972
1-B-2	0607/2725/05		0708/24/05		A-Act/360		45254NPR2		18,006,000.00		~~971~~942.~~796191~~775933		34.~~827868~~229660		2925.~~020258~~343959		3229.~~848126~~573619	~~942~~917.~~775933~~431974
2-B-1	0607/2725/05		0708/24/05		A-Act/360		45254NPS0		17,368,000.00		~~994~~992.~~611100~~142805		34.~~840377~~365704		25.~~468296~~864515		610.~~308673~~230219	~~992~~986.~~142805~~278289
2-B-2	0607/2725/05		0708/24/05		A-Act/360		45254NPT8		10,358,000.00		~~994~~992.~~611103~~142807		45.~~510161~~433636		25.~~468296~~864515		611.~~978457~~298151	~~992~~986.~~142807~~278291
CERT	0607/01/05		0607/30/05		A-30/360				1,922,316,000.00		0.000000		0.~~842992~~581069		0.000000		0.~~842992~~581069	0.000000
Page 3 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Distribution to Date -
																	Current
	Original				Unscheduled		Scheduled		Total		Total		Realized		Deferred		Principal
Class	Face Value		Interest		Principal		Principal		Principal		Distribution		Loss		Interest		Balance
	(1)		(2)		(3)		(4)		(5)=(3)+(4)		(6)=(2)+(5)		(7)		(8)		(9)=(1)-(5)-(7)+(8)
1-A-1A	1,047,829,000.00		711,~~898~~071,~~779~~756.4042		5884,~~367~~440,~~723~~611.2197		12,~~593~~076,~~313~~560.8645		5986,~~961~~517,~~037~~172.0742		6797,~~859~~588,~~816~~928.4784		0.00		0.00		~~987~~961,~~867~~311,~~962~~827.9358
1-A-1B	200,000,000.00		12,~~481~~087,~~974~~603.2705		1116,~~140~~117,~~696~~250.2843		~~304~~396,~~117~~354.1583		1116,~~444~~513,~~813~~605.4326		1218,~~926~~601,~~787~~208.7031		0.00		0.00		~~188~~183,~~555~~486,~~186~~394.5774
1-A-2	138,648,000.00		1,~~066~~494,~~445~~170.2752		711,~~723~~173,~~176~~122.2968		~~210~~274,~~826~~769.1703		711,~~934~~447,~~002~~891.4671		912,~~000~~942,~~447~~062.7323		0.00		0.00		~~130~~127,~~713~~200,~~997~~108.5429
1-A-IO	0.00		23,~~925~~656,~~000~~250.00		0.00		0.00		0.00		23,~~925~~656,~~000~~250.00		0.00		0.00		0.00
2-A-1	62,027,000.00		~~476~~675,~~504~~755.1785		~~467~~820,~~872~~050.3703		1926,~~485~~017.8674		~~487~~851,~~358~~116.2350		~~963~~1,~~862~~526,872.4035		0.00		0.00		61,~~539~~175,~~641~~883.7750
2-A-2	13,336,000.00		~~104~~148,~~812~~564.9618		~~100~~176,~~594~~313.0333		45,~~189~~593.5290		~~104~~182,~~783~~992.5572		~~209~~331,~~596~~556.5190		0.00		0.00		13,~~231~~153,~~216~~007.4528
1-M-1	162,956,000.00		1,~~285~~800,~~579~~200.5672		913,~~077~~132,~~216~~013.5129		~~247~~322,~~788~~941.5799		913,~~325~~454,~~005~~955.0828		1015,~~610~~255,~~584~~156.6400		0.00		0.00		~~153~~149,~~630~~501,~~994~~044.9272
1-M-2	84,629,000.00		~~673~~942,~~216~~538.2595		46,~~714~~819,~~129~~933.93		~~128~~167,~~685~~715.6557		46,~~842~~987,~~815~~649.5850		57,~~516~~930,~~031~~188.8345		0.00		0.00		7977,~~786~~641,~~184~~350.4250
1-M-3	45,015,000.00		~~360~~504,~~064~~051.7706		23,~~507~~627,~~492~~590.2114		6889,~~449~~209.1756		23,~~575~~716,~~941~~799.3870		24,~~936~~220,~~006~~850.1576		0.00		0.00		4241,~~439~~298,~~058~~200.6230
1-M-4	27,009,000.00		~~226~~316,~~108~~227.3165		12,~~504~~176,~~495~~554.3207		4153,~~069~~525.5074		12,~~545~~230,~~564~~079.8281		12,~~771~~546,~~673~~307.1346		0.00		0.00		2524,~~463~~778,~~435~~920.1819
1-M-5	28,810,000.00		~~243~~339,~~080~~911.9929		12,~~604~~321,~~817~~689.2992		4357,~~808~~094.0891		12,~~648~~378,~~625~~784.3783		12,~~891~~718,~~706~~696.3612		0.00		0.00		2726,~~161~~431,~~374~~215.6317
1-M-6	22,508,000.00		~~193~~270,~~363~~292.8828		1,~~253~~813,~~773~~835.9636		3444,~~225~~605.3477		1,~~287~~858,~~999~~441.3013		12,~~481~~128,~~363~~733.1841		0.00		0.00		2120,~~220~~649,~~000~~558.7087
2-M-1	7,443,000.00		6085,~~475~~657.8102		5698,~~142~~402.8883		23,~~338~~122.2303		58102,~~481~~130.1169		~~118~~187,~~956~~787.9271		0.00		0.00		7,~~384~~340,~~518~~869.8931
2-M-2	11,165,000.00		96137,~~900~~058.2141		84147,~~218~~610.0886		34,~~507~~683.5025		87153,~~725~~202.5889		~~184~~290,~~625~~261.7930		0.00		0.00		11,~~077~~011,~~274~~797.4211
1-B-1	25,209,000.00		~~246~~344,~~974~~390.3736		12,~~404~~031,~~229~~498.0986		3849,~~332~~958.4555		12,~~442~~081,~~561~~457.5441		12,~~689~~425,~~535~~847.9177		0.00		0.00		23,~~766~~127,~~438~~542.4659
1-B-2	18,006,000.00		~~194~~270,~~175~~334.6792		1,~~002~~451,~~996~~036.8805		2735,~~379~~683.6783		1,~~030~~486,~~376~~719.5588		1,~~224~~757,~~552~~054.2280		0.00		0.00		16,~~975~~519,~~623~~280.4512
2-B-1	17,368,000.00		~~185~~261,~~357~~181.6823		~~131~~229,~~007~~619.5984		57,~~456~~285.1815		~~136~~238,~~463~~318.7767		~~321~~499,~~821~~499.4590		0.00		0.00		17,~~231~~129,~~536~~681.2333
2-B-2	10,358,000.00		~~126~~182,~~272~~553.3090		78136,~~130~~941.8361		34,~~253~~344.9875		81142,~~384~~129.8146		~~207~~324,~~657~~683.1136		0.00		0.00		10,~~276~~215,~~615~~870.1954
CERT	1,922,316,000.00		67,~~054~~171,~~918~~915.0143		0.00		0.00		0.00		67,~~054~~171,~~918~~915.0143		0.00		0.00		0.00
Total	3,844,632,000.00		2331,~~900~~760,~~003~~413.8824		~~101~~146,~~218~~714,~~712~~075.7520		23,~~776~~619,~~226~~467.8805		~~103~~150,~~994~~343,~~939~~447.6386		~~127~~182,~~894~~103,~~943~~861.5110		0.00		0.00		1,~~818~~771,~~321~~972,~~060~~552.3714
Page 4 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Interest Detail -
	Pass		Prior Principal				Non-		Prior		Unscheduled				Paid or		Current
	Through		(with Notional)		Accrued		Supported		Unpaid		Interest		Optimal		Deferred		Unpaid
Class	Rate		Balance		Interest		Interest SF		Interest		Adjustment		Interest		Interest		Interest
					(1)		(2)		(3)		(4)		(5)=(1)-(2)+(3)+(4)		(6)		(7)=(5)-(6)
1-A-1A	3.~~58438~~73000%		1987,~~018~~867,~~276,230~~962.6493		23,~~838~~172,~~802~~977.5202		0.00		0.00		0.00		23,~~838~~172,~~802~~977.5202		23,~~838~~172,~~802~~977.5202		0.00
1-A-1B	3.~~48438~~73000%		~~194~~188,~~359~~555,~~238~~186.1357		~~526~~605,~~727~~628.7978		0.00		0.00		0.00		~~526~~605,~~727~~628.7978		~~526~~605,~~727~~628.7978		0.00
1-A-2	3.~~65438~~80000%		~~134~~130,~~737~~713,~~598~~997.2454		~~382~~427,~~964~~725.0825		0.00		0.00		0.00		~~382~~427,~~964~~725.0825		~~382~~427,~~964~~725.0825		0.00
1-A-IO	0.75000%		1,~~350~~170,000,000.00		~~843~~731,~~750~~250.00		0.00		0.00		0.00		~~843~~731,~~750~~250.00		~~843~~731,~~750~~250.00		0.00
2-A-1	3.~~61438~~76000%		61,~~692~~539,~~742~~641.7577		~~173~~199,~~429~~251.68		0.00		0.00		0.00		~~173~~199,~~429~~251.68		~~173~~199,~~429~~251.68		0.00
2-A-2	3.~~69438~~84000%		13,~~264~~231,~~133~~216.6445		3843,~~113~~751.2522		0.00		0.00		0.00		3843,~~113~~751.2522		3843,~~113~~751.2522		0.00
1-M-1	3.~~74438~~89000%		~~158~~153,~~360~~630,~~020~~994.0592		~~461~~514,~~191~~621.1816		0.00		0.00		0.00		~~461~~514,~~191~~621.1816		~~461~~514,~~191~~621.1816		0.00
1-M-2	3.~~77438~~92000%		8279,~~242~~786,~~139~~184.8242		~~241~~269,~~432~~322.4070		0.00		0.00		0.00		~~241~~269,~~432~~322.4070		~~241~~269,~~432~~322.4070		0.00
1-M-3	3.~~79438~~94000%		4342,~~745~~439,~~405~~058.5262		~~129~~143,~~100~~986.7629		0.00		0.00		0.00		~~129~~143,~~100~~986.7629		~~129~~143,~~100~~986.7629		0.00
1-M-4	34.~~96438~~11000%		2625,~~247~~463,~~243~~435.3218		8090,~~930~~119.9334		0.00		0.00		0.00		8090,~~930~~119.9334		8090,~~930~~119.9334		0.00
1-M-5	34.~~99438~~14000%		27,~~997~~161,~~448~~374.2663		8696,~~980~~830.7930		0.00		0.00		0.00		8696,~~980~~830.7930		8696,~~980~~830.7930		0.00
1-M-6	4.~~06438~~21000%		21,~~873~~220,~~188~~000.6670		6976,~~145~~928.1840		0.00		0.00		0.00		6976,~~145~~928.1840		6976,~~145~~928.1840		0.00
2-M-1	3.~~81438~~96000%		7,~~402~~384,~~890~~518.4289		2125,~~962~~181.4521		0.00		0.00		0.00		2125,~~962~~181.4521		2125,~~962~~181.4521		0.00
2-M-2	4.~~06438~~21000%		11,~~104~~077,~~832~~274.9442		3540,~~104~~158.4320		0.00		0.00		0.00		3540,~~104~~158.4320		3540,~~104~~158.4320		0.00
1-B-1	4.~~60883~~76000%		2423,~~498~~766,~~010~~438.1546		8797,~~816~~415.7299		0.00		0.00		0.00		8797,~~816~~415.7299		8797,~~922~~415.4399		0.00
1-B-2	45.~~60883~~21000%		1716,~~498~~975,~~162~~623.2145		6276,~~724~~159.7425		0.00		0.00		0.00		6276,~~724~~159.7425		6876,~~924~~159.6025		0.00
2-B-1	45.~~96438~~11000%		17,~~274~~231,~~405~~536.5923		6675,~~699~~823.6755		0.00		0.00		0.00		6675,~~699~~823.6755		6675,~~699~~823.6755		0.00
2-B-2	56.~~83020~~36000%		10,~~302~~276,~~181~~615.8019		4656,~~716~~281.2560		0.00		0.00		0.00		4656,~~716~~281.2560		4656,~~716~~281.2560		0.00
CERT	0.00000%		0.00		0.00		0.00		0.00		0.00		0.00		1,~~620~~116,~~496~~997.6842		0.00
Total			32,~~220~~988,~~875~~321,~~872~~060.1437		6,~~193~~743,~~592~~411.8294		0.00		0.00		0.00		6,~~193~~743,~~592~~411.8294		7,~~820~~860,~~395~~409.0736		0.00
Page 5 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Collection Account Report
SUMMARY
										Group 2		Group 1		Total
Principal Collections										~~120~~632,~~844~~009.6971		5245,~~254~~634,~~427~~814.5835		5246,~~375~~266,~~272~~824.2706
Principal Withrawals										0.00		0.00		0.00
Principal Other Accounts										0.00		0.00		0.00
TOTAL NET PRINCIPAL										~~120~~632,~~844~~009.6971		5245,~~254~~634,~~427~~814.5835		5246,~~375~~266,~~272~~824.2706
Interest Collections										561,~~740~~459.6711		8,~~639~~279,~~719~~851.3725		98,~~201~~841,~~460~~310.0436
Interest Withdrawals										-0.00		-0.00		-0.00
Interest Other Accounts										0(38,889.0028)		(~~762~~559,~~989~~283.7104)		(~~762~~559,~~989~~283.7104)
Interest Fees										-~~175~~438.4420		-~~438~~300,~~360~~606.3231		-~~438~~301,~~535~~044.7651
TOTAL NET INTEREST										~~561~~522,~~565~~131.2363		7,~~438~~419,~~369~~961.3490		7,~~999~~942,~~934~~093.5753
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION										~~682~~1,~~409~~154,141.9234		5953,~~692~~054,~~796~~776.9225		6054,~~375~~208,~~206~~917.8459
PRINCIPAL - COLLECTIONS
											Group 2		Group 1		Total
Scheduled Principal Received											~~125~~104,~~820~~715.5712		~~775~~738,~~816~~525.6906		~~901~~843,~~637~~240.2618
Curtailments											-41,~~975~~122.8834		~~473~~161,~~674~~045.3865		~~468~~159,~~698~~923.5031
Prepayments In Full											~~0.00~~#######		5044,~~079~~735,~~942~~243.1064		5045,~~079~~263,~~942~~660.1057
Repurchased/Substitutions											0.00		~~924,994~~0.4100		~~924,994~~0.4100
Liquidations											0.00		0.00		0.00
Insurance Principal											0.00		0.00		0.00
Other Additional Principal											0.00		0.00		0.00
Delinquent Principal											-~~125~~103,~~820~~454.5771		-~~422~~458,~~767~~411.0445		-~~548~~561,~~587~~866.6116
Realized Losses											-0.00		-0.00		-0.00
Advanced Principal											~~125~~103,~~820~~454.5771		~~422~~458,~~767~~411.0445		~~548~~561,~~587~~866.6116
TOTAL PRINCIPAL COLLECTED											~~120~~632,~~844~~009.6971		5245,~~254~~634,~~427~~814.5835		5246,~~375~~266,~~272~~824.2706
PRINCIPAL - WITHDRAWALS
SPACE INTENTIONALLY LEFT BLANK
PRINCIPAL - OTHER ACCOUNTS
										Group 2		Group 1		Total
Closing Deposit										0.00		0.00		0.00
TOTAL PRINCIPAL OTHER ACCOUNTS										0.00		0.00		0.00
Page 6 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
INTEREST - COLLECTIONS
										Group 2		Group 1		Total
Scheduled Interest										578,~~562~~001.2939		8,~~840~~605,~~911~~084.8784		9,~~419~~183,~~474~~086.1623
Repurchased/Substitution Interest										0.00		~~5,385~~0.8600		~~5,385~~0.8600
Liquidation Interest										0.00		0.00		0.00
Insurance Interest										0.00		0.00		0.00
Other Additional Interest										0.00		0.00		0.00
Prepayment Interest Shortfalls										-01,312.0012		-110,~~714~~014.1907		-~~110~~111,~~714~~326.19
Delinquent Interest										-~~578~~568,~~562~~726.2920		-34,~~246~~958,~~195~~893.9713		-35,~~824~~527,~~758~~619.2633
Compensating Interest										01,312.0012		110,~~714~~014.1907		~~110~~111,~~714~~326.19
Civil Relief Act Shortfalls										-0.00		-0.00		-0.00
Interest Advanced										~~561~~552,~~740~~183.6792		34,~~039~~633,~~617~~659.6053		35,~~601~~185,~~358~~843.2745
TOTAL INTEREST COLLECTED										561,~~740~~459.6711		8,~~639~~279,~~719~~851.3725		98,~~201~~841,~~460~~310.0436
INTEREST - WITHDRAWALS
										Group 2		Group 1		Total
TOTAL INTEREST WITHDRAWALS										0.00		0.00		0.00
INTEREST - OTHER ACCOUNTS
										Group 2		Group 1		Total
Prepayment Charges														~~201~~128,~~419~~724.7987
Deriviative Contract Payments														~~964~~726,~~409~~897.5019
TOTAL INTEREST OTHER ACCOUNTS										0-38,889.0028		-~~762~~559,~~989~~283.7104		-~~762~~559,~~989~~283.7104
INTEREST - FEES
										Group 2		Group 1		Total
Servicing Fees										0262.0093		~~381~~245,~~916~~703.7982		~~381~~245,~~916~~966.7975
Owner Trustee Fee										175.4427		2,~~478~~404.9391		2,~~654~~580.3717
Primary Mortgage Insurance														5352,~~964~~497.6058
TOTAL INTEREST FEES										~~175~~438.4420		~~438~~300,~~360~~606.3231		~~438~~301,~~535~~044.7651
Page 7 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Credit Enhancement Report
ACCOUNTS
RESERVE
Reserve Funds Distribution to Certificate Holders						~~6,305~~0.5700
Required Reserve Funds Deposited						~~6,305~~0.5700
Releases						0.00
INSURANCE
SPACE INTENTIONALLY LEFT BLANK
STRUCTURAL FEATURES
										Group 2		Group 1		Total
Overcollateralized Amount/(Undercollateralized Amount)										23,~~978~~060,~~491~~175.7794		0.00		23,~~978~~060,~~491~~175.7794
Overcollateralization Release Amount										0.00		0.00		0.00
Overcollateralization Deficiency Amount										1,~~232~~053,~~949~~410.7020		0.00		1,~~232~~053,~~949~~410.7020
Overcollateralization Target Amount										4,031,901.97		0.00		4,031,901.97
Page 8 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Collateral Report
COLLATERAL
											Group 2		Group 1		Total
Loan Count:
Original										103		7,292		7,395
Prior										103		76,~~094~~907		7,~~197~~010
Prefunding										0		0		0
Scheduled Paid Offs										-0		-0		-0
Full Voluntary Prepayments										-01		-~~185~~171		-~~185~~172
Repurchases										-0		-20		-20
Liquidations										-0		-0		-0
Current										~~103~~102		6,~~907~~736		76,~~010~~838
Principal Balance:
Original										124,058,522.19		1,800,593,709.86		1,924,652,232.05
Prior										123,~~840~~719,~~139~~294.4172		1,~~749~~697,~~834~~580,~~685~~257.0042		1,~~873~~821,~~674~~299,~~824~~552.4114
Prefunding										0.00		0.00		0.00
Scheduled Principal										-~~125~~104,~~820~~715.5712		-~~775~~738,~~816~~525.6906		-~~901~~843,~~637~~240.2618
Partial Prepayments										(41,~~975~~122.8834)		-~~473~~161,~~674~~045.3865		-~~468~~159,~~698~~923.5031
Full Voluntary Prepayments										-0528,416.0093		-5044,~~079~~735,~~942~~243.1064		-5045,~~079~~263,~~942~~660.1057
Repurchases										-0.00		-~~924,994~~0.4100		-~~924,994~~0.4100
Liquidations										-0.00		-0.00		-0.00
Current										123,~~719~~087,~~294~~285.7201		1,~~697~~651,~~580~~945,~~257~~443.4207		1,~~821~~775,~~299~~032,~~552~~728.1408
PREFUNDING
SPACE INTENTIONALLY LEFT BLANK
Page 9 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
CHARACTERISTICS
										Group 2		Group 1		Total
Weighted Average Coupon Original										5.60611%		6.06652%		6.03684%
Weighted Average Coupon Prior										5.~~60618~~60622%		6.~~06567~~06661%		6.~~03586~~03618%
Weighted Average Coupon Current										5.~~60622~~60625%		6.~~06661~~08521%		6.~~03618~~05268%
Weighted Average Months to Maturity Original										356		352		352
Weighted Average Months to Maturity Prior										~~356~~354		~~351~~350		~~351~~350
Weighted Average Months to Maturity Current										354		~~350~~349		350
Weighted Avg Remaining Amortization Term Original										356		352		352
Weighted Avg Remaining Amortization Term Prior										~~356~~354		~~351~~350		~~351~~350
Weighted Avg Remaining Amortization Term Current										354		~~350~~349		350
Weighted Average Seasoning Original										1.37		5.83		5.54
Weighted Average Seasoning Prior										23.37		67.7764		67.4835
Weighted Average Seasoning Current										34.37		78.6453		78.3524
Page 10 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
ARM CHARACTERISTICS
										Group 2		Group 1		Total
Weighted Average Margin Original										2.54639%		3.39316%		3.33799%
Weighted Average Margin Prior										2.54639%		3.~~39542~~39969%		3.~~33974~~34269%
Weighted Average Margin Current										2.54639%		3.~~39969~~40479%		3.~~34269~~34586%
Weighted Average Max Rate Original										11.60729%		12.00778%		11.98169%
Weighted Average Max Rate Prior										11.~~60736~~60739%		1211.~~00266~~99461%		11.~~97674~~96874%
Weighted Average Max Rate Current										11.~~60739~~60743%		11.~~99461~~98151%		11.~~96874~~95583%
Weighted Average Min Rate Original										5.60729%		3.52069%		3.65664%
Weighted Average Min Rate Prior										5.~~60736~~60739%		3.~~52392~~52969%		3.~~66055~~66849%
Weighted Average Min Rate Current										5.~~60739~~60743%		3.~~52969~~53233%		3.~~66849~~67479%
Weighted Average Cap Up Original										1.01865%		1.19649%		1.18491%
Weighted Average Cap Up Prior										1.~~01865~~01866%		1.~~19742~~19737%		1.~~18569~~18543%
Weighted Average Cap Up Current										1.01866%		1.~~19737~~19817%		1.~~18543~~18585%
Weighted Average Cap Down Original										1.01865%		1.19649%		1.18491%
Weighted Average Cap Down Prior										1.~~01865~~01866%		1.~~19742~~19737%		1.~~18569~~18543%
Weighted Average Cap Down Current										1.01866%		1.~~19737~~19817%		1.~~18543~~18585%
SERVICING FEES & ADVANCES
											Group 2		Group 1		Total
Current Servicing Fees										0262.0093		~~381~~245,~~916~~703.8184		~~381~~245,~~916~~966.8177
Delinquent Servicing Fees										16,~~821~~542.6227		~~206~~325,~~578~~233.3760		~~223~~341,~~399~~775.9987
TOTAL SERVICING FEES										16,~~821~~805.6220		~~588~~570,~~495~~937.1844		~~605~~587,~~316~~742.8064
Total Servicing Fees										16,~~821~~805.6220		~~588~~570,~~495~~937.1844		~~605~~587,~~316~~742.8064
Compensating Interest										-01,312.0012		-110,~~714~~014.1907		-~~110~~111,~~714~~326.19
Delinquent Servicing Fees										-16,~~821~~542.6227		-~~206~~325,~~578~~233.3760		-~~223~~341,~~399~~775.9987
COLLECTED SERVICING FEES										0-1,049.0019		~~271~~135,~~202~~689.6277		~~271~~134,~~202~~640.6259
Total Advaced Interest										~~561~~552,~~740~~183.6792		34,~~039~~633,~~617~~659.6053		35,~~601~~185,~~358~~843.2745
Total Advaced Principal										~~125~~103,~~820~~454.5771		~~422~~458,~~767~~411.0445		~~548~~561,~~587~~866.6116
Aggregate Advances with respect to this Distribution										~~687~~655,~~561~~638.2463		35,~~462~~092,~~384~~070.6498		45,~~149~~747,~~945~~709.8862
ADDITIONAL COLLATERAL INFORMATION
										Group 2		Group 1		Total
Prepayment Interest Shortfall (PPIS)										01,312.0012		110,~~714~~014.1907		~~110~~111,~~714~~326.19
Compensating Interest										-01,312.0012		-110,~~714~~014.1907		-~~110~~111,~~714~~326.19
Net Prepayment Interest Shortfall (PPIS)										0.00		0.00		0.00
Page 11 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Delinquency Report
	TOTAL
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				910,~~855~~892,~~067~~055.7913		24,~~753~~757,~~170~~575.8487		~~809~~1,~~347~~593,055.2514		1317,~~417~~242,~~585~~686.8814
			% Balance				0.5461%		0.1527%		0.0409%		0.7497%
			# Loans				4644		1423		47		6474
			% # Loans				0.6664%		0.2034%		0.0610%		01.9108%
	FORECLOSURE		Balance		~~174,953~~0.2800		0.00		0394,015.0064		01,734,032.0013		~~174~~2,~~953~~128,047.2877
			% Balance		0.0100%		0.00%		0.0002%		0.0010%		0.0112%
			# Loans		10		0		03		09		112
			% # Loans		0.0100%		0.00%		0.0004%		0.0013%		0.0118%
	BANKRUPTCY		Balance		23,~~418~~050,~~930~~622.3715		26154,~~922~~998.6422		~~149~~194,~~616~~658.0079		0149,484.0072		23,~~595~~549,~~469~~763.0188
			% Balance		0.1317%		0.0001%		0.01%		0.0001%		0.1420%
			# Loans		1716		15		1		01		1923
			% # Loans		0.2423%		0.0107%		0.01%		0.0001%		0.2734%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		23,~~593~~050,~~883~~622.6515		911,~~881~~047,~~990~~053.4335		25,~~902~~346,~~786~~250.8430		~~809~~3,~~347~~476,571.2599		1622,~~188~~920,~~008~~497.1779
			% Balance		0.1417%		0.5462%		0.1630%		0.0420%		01.8929%
			# Loans		1816		4749		1527		417		84109
			% # Loans		0.2623%		0.6772%		0.2139%		0.0625%		1.2059%
Page 12 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
	GROUP 1
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				910,~~855~~892,~~067~~055.7913		24,~~753~~757,~~170~~575.8487		~~809~~1,~~347~~593,055.2514		1317,~~417~~242,~~585~~686.8814
			% Balance				0.5866%		0.1629%		0.0510%		01.7904%
			# Loans				4644		1423		47		6474
			% # Loans				0.6765%		0.2034%		0.0610%		01.9310%
	FORECLOSURE		Balance		~~174,953~~0.2800		0.00		0394,015.0064		01,734,032.0013		~~174~~2,~~953~~128,047.2877
			% Balance		0.0100%		0.00%		0.0002%		0.0010%		0.0113%
			# Loans		10		0		03		09		112
			% # Loans		0.0100%		0.00%		0.0004%		0.0013%		0.0118%
	BANKRUPTCY		Balance		23,~~418~~050,~~930~~622.3715		26154,~~922~~998.6422		~~149~~194,~~616~~658.0079		0149,484.0072		23,~~595~~549,~~469~~763.0188
			% Balance		0.1418%		0.0001%		0.01%		0.0001%		0.1521%
			# Loans		1716		15		1		01		1923
			% # Loans		0.2524%		0.0107%		0.01%		0.0001%		0.2834%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		23,~~593~~050,~~883~~622.6515		911,~~881~~047,~~990~~053.4335		25,~~902~~346,~~786~~250.8430		~~809~~3,~~347~~476,571.2599		1622,~~188~~920,~~008~~497.1779
			% Balance		0.1518%		0.5867%		0.1732%		0.0521%		01.9539%
			# Loans		1816		4749		1527		417		84109
			% # Loans		0.2624%		0.6873%		0.2240%		0.0625%		1.2262%
Page 13 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
	GROUP 2
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				0.00		0.00		0.00		0.00
			% Balance				0.00%		0.00%		0.00%		0.00%
			# Loans				0		0		0		0
			% # Loans				0.00%		0.00%		0.00%		0.00%
	FORECLOSURE		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	BANKRUPTCY		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	REO		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
	TOTAL		Balance		0.00		0.00		0.00		0.00		0.00
			% Balance		0.00%		0.00%		0.00%		0.00%		0.00%
			# Loans		0		0		0		0		0
			% # Loans		0.00%		0.00%		0.00%		0.00%		0.00%
Page 14 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
REO Report
Loan Number			Original		Stated				Current		State &
														First
&			Principal		Principal		Paid to		Note		LTV at		Original		Payment
Loan Group			Balance		Balance		Date		Rate		Origination		Term		Date
TOTAL
Page 15 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Foreclosure Report
Loan Number			Original		Stated				Current		State &
														First
&			Principal		Principal		Paid to		Note		LTV at		Original		Payment
Loan Group			Balance		Balance		Date		Rate		Origination		Term		Date
3900011136 1
1103402684 1
			182,400.00		174,953.28		01-Jul-2005		5.750%		CA - 95.00%		360		01-Mar-2002
			28,800.00		28,582.38		01-Apr-2005		7.250%		MO - 90.00%		360		01-Dec-2004
TOTAL			182,400.00		174,953.28
1103402973 1			312,000.00		309,689.26		01-Apr-2005		6.250%		MD - 80.00%		360		01-Feb-2005
1103403214 1			225,000.00		223,821.19		01-Mar-2005		6.750%		CO - 90.00%		360		01-Mar-2005
1103403282 1			228,600.00		227,402.32		01-Mar-2005		6.750%		CO - 90.00%		360		01-Mar-2005
1103403374 1			112,005.00		111,529.06		01-Mar-2005		6.875%		MO - 95.00%		360		01-Apr-2005
1103403998 1			56,000.00		55,744.00		01-Apr-2005		6.500%		MI - 70.00%		360		01-Apr-2005
1103404311 1			89,300.00		88,511.70		01-Mar-2005		7.500%		IA - 95.00%		360		01-Mar-2005
1103404501 1			250,500.00		249,382.68		01-Mar-2005		6.625%		IL - 91.09%		360		01-Apr-2005
3900011033 1			77,600.00		74,546.79		01-Mar-2005		6.500%		CA - 80.00%		360		01-Mar-2002
3900011174 1			252,700.00		240,836.59		01-Feb-2005		5.500%		NJ - 95.00%		360		01-Mar-2002
3900011675 1			132,000.00		127,781.50		01-Mar-2005		6.250%		IA - 93.62%		360		01-Sep-2002
3900011770 1			408,000.00		390,220.30		01-Feb-2005		5.750%		CA - 80.00%		360		01-Oct-2002
TOTAL			2,172,505.00		2,128,047.77
Page 16 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Prepayment Report
VOLUNTARY PREPAYMENTS
											Group 2		Group 1		Total
Current
Number of Paid in Full Loans										01		~~185~~171		~~185~~172
Number of Repurchased Loans										0		20		20
Total Number of Loans Prepaid in Full										01		~~187~~171		~~187~~172
Curtailments Amount										-41,~~975~~122.8834		~~473~~161,~~674~~045.3865		~~468~~159,~~698~~923.5031
Paid in Full Balance										~~0.00~~#######		5044,~~079~~735,~~942~~243.1064		5045,~~079~~263,~~942~~660.1057
Repurchased Loans Balance										0.00		~~924,994~~0.4100		~~924,994~~0.4100
Total Prepayment Amount										-4527,~~975~~294.8859		5144,~~478~~896,~~610~~289.8929		5145,~~473~~423,~~635~~583.0188
Cumulative
Number of Paid in Full Loans										01		~~383~~554		~~383~~555
Number of Repurchased Loans										0		2		2
Total Number of Loans Prepaid in Full										01		~~385~~556		~~385~~557
Paid in Full Balance										0528,416.0093		97142,~~907~~642,~~461~~705.5014		97143,~~907~~171,~~461~~122.5007
Repurchased Loans Balance										0.00		924,994.41		924,994.41
Curtailments Amount										-1516,~~524~~646.6397		1,~~759~~920,~~521~~567.7641		1,~~743~~903,~~997~~920.1344
Total Prepayment Amount										~~-15~~511,~~524~~769.6396		~~100~~145,~~591~~488,~~977~~266.6796		~~100~~146,~~576~~000,~~453~~036.0492
Page 17 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
VOLUNTARY PREPAYMENTS RATES
											Group 2		Group 1		Total
SMM										0.0043%		2.9465%		2.7550%
3 Months Avg SMM										0.0014%		12.9053%		12.7837%
12 Months Avg SMM										0.0010%		12.9009%		1.7896%
Avg SMM Since Cut-off										0.0010%		12.9009%		1.7896%
CPR										-05.0500%		3027.1351%		2826.4316%
3 Months Avg CPR										-01.0567%		2026.5648%		1925.3404%
12 Months Avg CPR										-01.0524%		2022.5636%		1921.3410%
Avg CPR Since Cut-off										-01.0524%		2022.5636%		1921.3410%
PSA										-7572.1730%		1,~~972~~613.4340%		1,~~934~~587.5646%
3 Months Avg PSA Approximation										~~-10~~247.6079%		1,~~524~~732.6450%		1,~~498~~702.5129%
12 Months Avg PSA Approximation										~~-10~~215.6070%		1,~~524~~555.6414%		1,~~498~~529.5118%
Avg PSA Since Cut-off Approximation										~~-10~~215.6070%		1,~~524~~555.6414%		1,~~498~~529.5117%
Page 18 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
PREPAYMENT CALCULATION METHODOLOGY
Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases + Liquidations )/(Beg Principal Balance - Sched Principal) Conditional Prepayment Rate (CPR): 1-((1-SMM)^12) PSA Standard Prepayment Model: CPR/(0.002min(30,WAS)) Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn)(1-SMMn+1)...(1-SMMm)]^(1/months in period n,m) Conditional Prepayment Rate (CPR): 1-((1-SMM)^12) Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.002*Avg WASn,m)) Average WASn,m: (min(30,WASn)+min(30,WASn+1)+...+min(30,WASm)/(number of months in the period n,m) Weighted Average Seasoning (WAS) Dates correspond to distribution dates. Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments, liquidations, and repurchases.
Page 19 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Prepayment Detail Report
Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
&		Loan	Principal		Prepayment			Prepayment		Note		LTV at		&		Payment
Loan Group		Status	Balance		Amount			Date		Rate		Origination		Original Term		Date
1103167182 1			171,000.00		170,093.63			17-Jun-2005		11.000%		HI - 15.00%		Paid Off - 360		01-May-2004
1103258042 1			125,307.00		125,033.80			26-Jul-2005		11.750%		CA - 30.00%		Paid Off - 180		01-Jan-2005
1103292726 1			51,000.00		50,888.80			16-Jun-2005		11.750%		FL - 30.00%		Paid Off - 180		01-Dec-2004
1103262173 1			68,100.00		67,948.08			15-Jul-2005		12.500%		CA - 19.99%		Paid Off - 180		01-Dec-2004
1103295242 1			425,700.00		425,700.00			30-Jun-2005		6.125%		CA - 80.00%		Paid Off - 360		01-May-2005
1103264160 1			37,800.00		37,405.47			07-Jul-2005		10.875%		FL - 20.00%		Paid Off - 180		01-Dec-2004
1103309243 1			68,196.00		68,072.60			16-Jun-2005		11.875%		CO - 30.00%		Paid Off - 180		01-Jan-2005
1103276013 1			59,000.00		58,099.36			13-Jul-2005		10.250%		FL - 20.00%		Paid Off - 180		01-Dec-2004
1103322914 1			100,800.00		100,547.70			02-Jun-2005		10.375%		CA - 20.00%		Paid Off - 180		01-Jan-2005
1103320335 1			56,450.00		56,333.51			01-Jul-2005		12.000%		NV - 20.01%		Paid Off - 180		01-Jan-2005
1103329508 1			111,750.00		111,485.58			03-Jun-2005		11.375%		CA - 15.00%		Paid Off - 180		01-Dec-2004
1103332249 1			75,000.00		74,654.83			22-Jul-2005		8.875%		CA - 20.00%		Paid Off - 180		01-Dec-2004
1103332299 1			64,000.00		63,741.62			08-Jun-2005		8.875%		CA - 20.00%		Paid Off - 180		01-Nov-2004
1103332266 1			82,000.00		81,622.56			14-Jul-2005		8.875%		CA - 20.00%		Paid Off - 180		01-Dec-2004
1103334905 1			50,700.00		50,608.29			01-Jun-2005		11.875%		FL - 30.00%		Paid Off - 180		01-Jan-2005
1103345947 1			84,950.00		84,739.90			08-Jul-2005		7.000%		NY - 69.21%		Paid Off - 360		01-May-2005
1103337011 1			50,000.00		49,815.00			07-Jun-2005		8.500%		VA - 10.00%		Paid Off - 360		01-Jan-2005
1103354412 1			391,500.00		391,500.00			07-Jul-2005		7.000%		NJ - 89.99%		Paid Off - 360		01-May-2005
1103366252 1			280,000.00		265,182.41			30-Jun-2005		5.875%		CA - 73.69%		Paid Off - 360		01-Apr-2005
1103360740 1			269,500.00		269,500.00			26-Jul-2005		6.125%		MD - 70.00%		Paid Off - 360		01-May-2005
1103366343 1			280,000.00		279,139.37			30-Jun-2005		5.875%		CA - 70.00%		Paid Off - 360		01-Apr-2005
1103365591 1			432,000.00		432,000.00			01-Jul-2005		5.625%		CA - 39.46%		Paid Off - 360		01-Mar-2005
1103367073 1			185,000.00		184,695.83			09-Jun-2005		7.000%		FL - 94.73%		Paid Off - 360		01-May-2005
1103374916 1			265,500.00		265,500.00			01-Jul-2005		6.625%		CA - 75.00%		Paid Off - 360		01-Apr-2005
1103375889 1			104,000.00		103,755.14			29-Jun-2005		7.250%		FL - 80.00%		Paid Off - 360		01-Apr-2005
1103375989 1			255,200.00		255,200.00			01-Jul-2005		5.625%		CA - 80.00%		Paid Off - 360		01-May-2005
1103377526 1			392,000.00		391,998.33			22-Jun-2005		5.000%		CA - 70.00%		Paid Off - 360		01-May-2005
1103377087 1			230,400.00		230,333.76			12-Jul-2005		5.750%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103384064 1			268,000.00		268,000.00			30-Jun-2005		6.000%		MD - 80.00%		Paid Off - 360		01-Apr-2005
1103378874 1			327,896.00		327,896.00			08-Jul-2005		6.375%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103384100 1			189,000.00		189,000.00			29-Jun-2005		6.250%		VA - 90.00%		Paid Off - 360		01-Apr-2005
1103382722 1			196,000.00		195,439.15			29-Jul-2005		6.250%		CA - 80.00%		Paid Off - 360		01-May-2005
1103384131 1			292,000.00		292,000.00			10-Jun-2005		6.075%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103383516 1			287,000.00		286,950.20			21-Jul-2005		5.875%		CA - 70.00%		Paid Off - 360		01-Apr-2005
1103384135 1			572,000.00		572,000.00			15-Jun-2005		4.875%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103383828 1			346,500.00		346,500.00			28-Jul-2005		7.500%		CA - 82.50%		Paid Off - 360		01-May-2005
1103385105 1			650,000.00		649,999.99			17-Jun-2005		5.875%		CA - 70.30%		Paid Off - 360		01-Mar-2005
1103383922 1			382,500.00		381,723.35			28-Jul-2005		7.990%		DE - 85.00%		Paid Off - 360		01-May-2005
1103385431 1			70,400.00		70,400.00			23-Jun-2005		5.500%		SC - 80.00%		Paid Off - 360		01-May-2005
1103384130 1			248,400.00		248,400.00			07-Jul-2005		6.875%		CA - 92.00%		Paid Off - 360		01-Apr-2005
1103385651 1			1,000,000.00		1,000,000.00			01-Jun-2005		5.500%		HI - 40.00%		Paid Off - 360		01-May-2005
1103384163 1			208,000.00		208,000.00			14-Jul-2005		5.700%		WA - 80.00%		Paid Off - 360		01-Apr-2005
1103386422 1			451,500.00		451,500.00			30-Jun-2005		5.625%		HI - 70.00%		Paid Off - 360		01-May-2005
1103384971 1			379,350.00		379,350.00			20-Jul-2005		5.000%		CA - 79.99%		Paid Off - 360		01-Feb-2005
1103386534 1			322,000.00		322,000.00			14-Jun-2005		5.875%		MA - 68.52%		Paid Off - 360		01-May-2005
1103384981 1			454,000.00		454,000.00			11-Jul-2005		5.125%		CA - 80.00%		Paid Off - 360		01-Mar-2005
1103386720 1			112,000.00		111,824.73			17-Jun-2005		7.250%		MN - 80.00%		Paid Off - 360		01-May-2005
1103385057 1			512,000.00		511,871.99			29-Jul-2005		5.000%		CA - 80.00%		Paid Off - 360		01-Feb-2005
1103387290 1			157,950.00		157,950.00			14-Jun-2005		7.625%		CA - 80.00%		Paid Off - 360		01-May-2005
1103385073 1			275,200.00		275,200.00			29-Jul-2005		5.875%		NJ - 80.00%		Paid Off - 360		01-Mar-2005
1103387886 1			981,000.00		981,000.00			29-Jun-2005		5.000%		CA - 60.37%		Paid Off - 360		01-Dec-2004
1103385084 1			508,000.00		508,000.00			15-Jul-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Feb-2005
1103388100 1			650,000.00		650,000.00			20-Jun-2005		8.375%		FL - 74.29%		Paid Off - 360		01-May-2005
1103386722 1			100,000.00		99,598.76			08-Jul-2005		6.000%		MI - 50.00%		Paid Off - 360		01-Apr-2005
1103388668 1			85,600.00		85,600.00			28-Jun-2005		7.430%		KS - 80.00%		Paid Off - 360		01-Mar-2005
1103387425 1			124,800.00		124,800.00			29-Jul-2005		6.250%		FL - 80.00%		Paid Off - 360		01-May-2005
1103389233 1			122,250.00		122,087.59			02-Jun-2005		5.390%		MA - 75.00%		Paid Off - 360		01-Mar-2005
1103387967 1			126,320.00		126,070.43			19-Jul-2005		8.125%		FL - 80.00%		Paid Off - 360		01-May-2005
1103389378 1			226,300.00		225,364.12			10-Jun-2005		5.840%		CA - 73.00%		Paid Off - 360		01-Mar-2005
1103388265 1			149,400.00		149,381.63			05-Jul-2005		5.875%		FL - 70.00%		Paid Off - 360		01-May-2005
1103389399 1			196,000.00		196,000.00			16-Jun-2005		6.740%		FL - 80.00%		Paid Off - 360		01-Mar-2005
1103388666 1			103,200.00		102,741.00			14-Jul-2005		6.640%		WI - 64.50%		Paid Off - 360		01-Mar-2005
1103389487 1			437,600.00		437,600.00			10-Jun-2005		6.140%		CA - 88.59%		Paid Off - 360		01-Apr-2005
1103388752 1			237,600.00		237,600.00			12-Jul-2005		5.690%		CA - 80.00%		Paid Off - 360		01-Mar-2005
1103389490 1			338,000.00		336,704.62			13-Jun-2005		6.240%		VA - 62.95%		Paid Off - 360		01-Mar-2005
1103388764 1			370,000.00		368,082.63			19-Jul-2005		5.840%		CA - 83.91%		Paid Off - 360		01-Mar-2005
1103389586 1			248,000.00		247,999.00			29-Jun-2005		6.500%		NV - 80.00%		Paid Off - 360		01-May-2005
1103388844 1			210,000.00		210,000.00			20-Jul-2005		6.240%		FL - 83.34%		Paid Off - 360		01-Apr-2005
1103389731 1			206,150.00		205,451.26			27-Jun-2005		6.875%		NE - 95.00%		Paid Off - 360		01-Mar-2005
1103389007 1			115,200.00		115,200.00			15-Jul-2005		5.900%		AZ - 80.00%		Paid Off - 360		01-Apr-2005
1103390384 1			295,800.00		295,800.00			17-Jun-2005		6.625%		CA - 68.00%		Paid Off - 360		01-May-2005
1103389008 1			134,271.00		134,271.00			13-Jul-2005		6.490%		AZ - 79.93%		Paid Off - 360		01-Dec-2004
1103391098 1			374,550.00		374,550.00			17-Jun-2005		5.625%		CA - 70.00%		Paid Off - 360		01-May-2005
1103389082 1			100,000.00		99,590.32			15-Jul-2005		5.890%		CA - 80.00%		Paid Off - 360		10-Mar-2005
Page 20 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
&		Loan	Principal		Prepayment			Prepayment		Note		LTV at		&		Payment
Loan Group		Status	Balance		Amount			Date		Rate		Origination		Original Term		Date
1103391430 1			380,600.00		380,600.00			07-Jun-2005		6.500%		VA - 69.99%		Paid Off - 360		01-May-2005
1103389112 1			108,000.00		107,520.79			28-Jul-2005		6.690%		MO - 84.38%		Paid Off - 360		01-Mar-2005
1103392713 1			200,050.00		200,050.00			21-Jun-2005		6.000%		FL - 70.00%		Paid Off - 360		01-May-2005
1103389119 1			156,800.00		156,800.00			13-Jul-2005		6.740%		AZ - 80.00%		Paid Off - 360		01-Mar-2005
1103392977 1			382,000.00		382,000.00			06-Jun-2005		5.750%		CA - 55.37%		Paid Off - 360		01-May-2005
1103389148 1			181,080.00		179,908.07			13-Jul-2005		5.640%		VA - 79.43%		Paid Off - 360		01-Feb-2005
1103393066 1			166,392.00		166,392.00			16-Jun-2005		6.000%		FL - 80.00%		Paid Off - 360		01-Apr-2005
1103389506 1			282,400.00		281,700.69			07-Jul-2005		6.040%		SC - 80.00%		Paid Off - 360		01-Apr-2005
1103393090 1			155,700.00		155,700.00			17-Jun-2005		8.875%		FL - 90.00%		Paid Off - 360		01-Apr-2005
1103389508 1			450,000.00		449,727.85			07-Jul-2005		5.990%		IL - 58.45%		Paid Off - 360		01-Mar-2005
1103393169 1			311,752.00		311,752.00			28-Jun-2005		6.375%		VA - 80.00%		Paid Off - 360		01-Apr-2005
1103389594 1			351,400.00		351,400.00			19-Jul-2005		5.500%		CA - 70.00%		Paid Off - 360		01-May-2005
1103393883 1			280,000.00		280,000.00			01-Jun-2005		5.500%		CA - 70.00%		Paid Off - 360		01-May-2005
1103391404 1			455,000.00		455,000.00			14-Jul-2005		5.125%		CA - 70.00%		Paid Off - 360		01-May-2005
1103394669 1			400,000.00		398,855.45			21-Jun-2005		6.250%		CA - 37.38%		Paid Off - 360		01-Apr-2005
1103391912 1			246,050.00		246,050.00			07-Jul-2005		8.375%		NV - 95.00%		Paid Off - 360		01-May-2005
1103394944 1			408,244.00		408,244.00			23-Jun-2005		5.875%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103392000 1			268,500.00		268,500.00			21-Jul-2005		6.250%		CA - 79.99%		Paid Off - 360		01-May-2005
1103395036 1			368,000.00		368,000.00			01-Jun-2005		5.875%		CA - 80.00%		Paid Off - 360		01-Mar-2005
1103392795 1			328,000.00		328,000.00			20-Jul-2005		7.125%		WA - 80.00%		Paid Off - 360		01-May-2005
1103395043 1			520,000.00		520,000.00			27-Jun-2005		6.000%		CA - 79.81%		Paid Off - 360		01-Mar-2005
1103393087 1			139,500.00		139,500.00			22-Jul-2005		7.375%		FL - 90.00%		Paid Off - 360		01-Apr-2005
1103395139 1			364,760.00		363,612.02			23-Jun-2005		5.750%		CA - 79.11%		Paid Off - 360		01-Apr-2005
1103394245 1			252,000.00		252,000.00			22-Jul-2005		6.750%		CA - 80.00%		Paid Off - 360		01-May-2005
1103395169 1			387,700.00		387,700.00			21-Jun-2005		6.250%		NV - 79.99%		Paid Off - 360		01-Apr-2005
1103395099 1			476,000.00		476,000.00			05-Jul-2005		6.750%		OR - 80.00%		Paid Off - 360		01-Mar-2005
1103395235 1			376,216.00		376,216.00			15-Jun-2005		5.625%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103395114 1			1,000,000.00		995,430.71			13-Jul-2005		6.500%		IL - 55.55%		Paid Off - 360		01-Mar-2005
1103395347 1			684,400.00		684,400.00			01-Jun-2005		7.375%		VA - 79.99%		Paid Off - 360		01-Apr-2005
1103395183 1			544,000.00		544,000.00			22-Jul-2005		6.875%		FL - 80.00%		Paid Off - 360		01-Mar-2005
1103395530 1			103,700.00		103,700.00			02-Jun-2005		6.125%		AZ - 70.00%		Paid Off - 360		01-May-2005
1103395237 1			994,500.00		994,315.65			21-Jul-2005		5.750%		HI - 65.00%		Paid Off - 360		01-Apr-2005
1103396335 1			500,800.00		500,800.00			28-Jun-2005		7.000%		NV - 80.00%		Paid Off - 360		01-May-2005
1103395271 1			452,000.00		450,430.18			26-Jul-2005		6.750%		NJ - 71.74%		Paid Off - 360		01-Apr-2005
1103399093 1			850,000.00		850,000.00			22-Jun-2005		5.990%		HI - 51.51%		Paid Off - 360		01-Apr-2005
1103395327 1			324,000.00		324,000.00			18-Jul-2005		6.000%		CA - 80.00%		Paid Off - 360		01-Mar-2005
1103399679 1			516,690.00		516,690.00			07-Jun-2005		6.250%		VA - 90.01%		Paid Off - 360		01-May-2005
1103397333 1			85,400.00		85,183.52			29-Jul-2005		6.875%		FL - 70.00%		Paid Off - 360		01-May-2005
1103399715 1			135,000.00		135,000.00			17-Jun-2005		7.125%		VA - 79.88%		Paid Off - 360		01-Apr-2005
1103398293 1			160,000.00		160,000.00			08-Jul-2005		6.625%		FL - 76.19%		Paid Off - 360		01-May-2005
1103399727 1			219,200.00		219,200.00			30-Jun-2005		6.125%		VA - 80.00%		Paid Off - 360		01-May-2005
1103398379 1			550,000.00		550,000.00			12-Jul-2005		5.875%		CA - 24.71%		Paid Off - 360		01-May-2005
1103399833 1			325,832.00		325,832.00			27-Jun-2005		6.000%		FL - 80.00%		Paid Off - 360		01-Apr-2005
1103398560 1			160,720.00		160,350.87			27-Jul-2005		7.375%		FL - 80.00%		Paid Off - 360		01-May-2005
1103400020 1			521,100.00		521,100.00			13-Jun-2005		6.875%		VA - 79.99%		Paid Off - 360		01-May-2005
1103399087 1			151,200.00		151,200.00			01-Jul-2005		5.625%		AZ - 80.00%		Paid Off - 360		01-Apr-2005
1103400395 1			228,750.00		228,750.00			23-Jun-2005		5.750%		CA - 80.00%		Paid Off - 360		01-May-2005
1103402459 1			246,537.00		245,410.46			01-Jul-2005		6.500%		AZ - 90.00%		Paid Off - 360		01-Mar-2005
1103400406 1			425,000.00		425,000.00			30-Jun-2005		6.500%		CA - 56.66%		Paid Off - 360		01-May-2005
1103402468 1			410,490.00		408,412.74			11-Jul-2005		7.125%		VA - 90.00%		Paid Off - 360		01-Feb-2005
1103402440 1			400,000.00		397,742.42			30-Jun-2005		6.375%		MD - 93.02%		Paid Off - 360		01-Jan-2005
1103402581 1			352,000.00		350,017.67			25-Jul-2005		6.375%		NY - 80.00%		Paid Off - 360		01-Feb-2005
1103402454 1			190,000.00		189,089.12			03-Jun-2005		6.250%		CA - 48.74%		Paid Off - 360		01-Feb-2005
1103402588 1			166,410.00		165,745.72			26-Jul-2005		8.125%		FL - 90.00%		Paid Off - 360		01-Feb-2005
1103402497 1			126,913.00		124,652.81			24-Jun-2005		7.625%		AZ - 90.00%		Paid Off - 360		01-Oct-2004
1103402612 1			770,000.00		763,459.60			20-Jul-2005		5.750%		CA - 70.00%		Paid Off - 360		01-Dec-2004
1103402568 1			400,000.00		397,170.37			22-Jun-2005		6.000%		DE - 63.23%		Paid Off - 360		01-Dec-2004
1103402615 1			126,844.00		125,688.94			11-Jul-2005		5.375%		AZ - 80.00%		Paid Off - 360		01-Dec-2004
1103402586 1			117,300.00		117,023.80			01-Jun-2005		7.250%		FL - 60.00%		Paid Off - 360		01-Apr-2005
1103402628 1			399,667.00		397,361.84			12-Jul-2005		6.250%		CA - 90.00%		Paid Off - 360		01-Feb-2005
1103402657 1			145,422.00		144,730.94			29-Jun-2005		7.250%		AZ - 90.00%		Paid Off - 360		01-Jan-2005
1103402630 1			269,800.00		268,243.84			29-Jul-2005		6.250%		MD - 95.00%		Paid Off - 360		01-Feb-2005
1103402662 1			172,000.00		170,803.18			30-Jun-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Jan-2005
1103402680 1			168,625.00		167,515.68			26-Jul-2005		7.375%		FL - 95.00%		Paid Off - 360		01-Dec-2004
1103402719 1			198,000.00		196,836.97			28-Jun-2005		7.000%		FL - 90.00%		Paid Off - 360		01-Dec-2004
1103402732 1			122,400.00		121,667.62			18-Jul-2005		6.875%		FL - 90.00%		Paid Off - 360		01-Jan-2005
1103402741 1			414,800.00		412,267.37			23-Jun-2005		5.950%		CA - 89.20%		Paid Off - 360		01-Jan-2005
1103402790 1			175,750.00		174,894.06			14-Jul-2005		7.125%		CA - 95.00%		Paid Off - 360		01-Feb-2005
1103402811 1			144,000.00		143,298.71			03-Jun-2005		7.125%		NJ - 90.00%		Paid Off - 360		01-Jan-2005
1103402818 1			342,810.00		341,259.43			26-Jul-2005		7.500%		DC - 90.00%		Paid Off - 360		01-Feb-2005
1103402853 1			369,150.00		366,896.10			29-Jun-2005		5.950%		CA - 80.78%		Paid Off - 360		01-Jan-2005
1103402826 1			142,200.00		141,518.55			29-Jul-2005		8.000%		MN - 90.00%		Paid Off - 360		01-Jan-2005
1103402887 1			189,050.00		188,483.49			30-Jun-2005		7.500%		TN - 94.52%		Paid Off - 360		01-Mar-2005
1103402910 1			133,000.00		132,149.48			27-Jul-2005		6.625%		LA - 95.00%		Paid Off - 360		01-Jan-2005
1103402945 1			215,000.00		213,893.18			27-Jun-2005		5.875%		CA - 70.03%		Paid Off - 360		01-Feb-2005
1103402934 1			310,000.00		308,124.95			07-Jul-2005		6.000%		VA - 79.08%		Paid Off - 360		01-Feb-2005
Page 21 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
&		Loan	Principal		Prepayment			Prepayment		Note		LTV at		&		Payment
Loan Group		Status	Balance		Amount			Date		Rate		Origination		Original Term		Date
1103403031 1			252,000.00		250,772.73			14-Jun-2005		7.125%		DC - 90.00%		Paid Off - 360		01-Jan-2005
1103402963 1			414,960.00		413,153.39			01-Jul-2005		6.750%		FL - 95.00%		Paid Off - 360		01-Mar-2005
1103403084 1			500,000.00		498,386.31			29-Jun-2005		7.125%		FL - 89.71%		Paid Off - 360		01-Mar-2005
1103402966 1			302,744.00		301,577.92			19-Jul-2005		7.375%		CA - 90.00%		Paid Off - 360		01-Mar-2005
1103403091 1			180,000.00		179,177.49			30-Jun-2005		6.500%		IL - 72.00%		Paid Off - 360		01-Feb-2005
1103402987 1			206,000.00		205,035.79			12-Jul-2005		6.375%		GA - 71.03%		Paid Off - 360		01-Mar-2005
1103403100 1			285,750.00		284,850.00			29-Jun-2005		7.250%		NV - 90.00%		Paid Off - 360		01-Mar-2005
1103403046 1			450,000.00		446,516.96			27-Jul-2005		6.375%		VA - 90.00%		Paid Off - 360		01-Feb-2005
1103403159 1			367,500.00		366,025.58			21-Jun-2005		6.000%		FL - 75.00%		Paid Off - 360		01-Mar-2005
1103403097 1			330,000.00		328,379.83			25-Jul-2005		6.125%		NC - 64.71%		Paid Off - 360		01-Mar-2005
1103403205 1			157,500.00		156,911.80			13-Jun-2005		6.375%		FL - 90.00%		Paid Off - 360		01-Mar-2005
1103403192 1			166,500.00		165,792.52			19-Jul-2005		6.875%		FL - 90.00%		Paid Off - 360		01-Mar-2005
1103403250 1			187,000.00		186,334.54			23-Jun-2005		6.625%		FL - 89.05%		Paid Off - 360		01-Mar-2005
1103403232 1			334,500.00		333,125.78			29-Jul-2005		5.875%		CA - 79.64%		Paid Off - 360		01-Apr-2005
1103403273 1			304,000.00		302,944.18			22-Jun-2005		6.750%		IL - 80.00%		Paid Off - 360		01-Mar-2005
1103403276 1			252,000.00		251,053.08			07-Jul-2005		7.500%		NJ - 90.00%		Paid Off - 360		01-Mar-2005
1103403301 1			176,310.00		175,695.31			21-Jun-2005		7.875%		FL - 90.00%		Paid Off - 360		01-Feb-2005
1103403355 1			220,000.00		219,235.90			27-Jul-2005		6.750%		SC - 80.00%		Paid Off - 360		01-Apr-2005
1103403308 1			255,000.00		254,092.57			30-Jun-2005		6.625%		AZ - 79.94%		Paid Off - 360		01-Mar-2005
1103403358 1			220,230.00		219,316.78			06-Jul-2005		7.000%		VA - 89.98%		Paid Off - 360		01-Mar-2005
1103403402 1			175,750.00		172,529.81			30-Jun-2005		6.950%		TN - 95.00%		Paid Off - 360		01-Mar-2005
1103403418 1			275,500.00		274,464.83			13-Jul-2005		7.500%		MI - 87.46%		Paid Off - 360		01-Mar-2005
1103403404 1			106,600.00		106,367.05			14-Jun-2005		7.625%		FL - 89.97%		Paid Off - 360		01-Apr-2005
1103403633 1			500,000.00		498,157.03			12-Jul-2005		6.500%		NV - 89.29%		Paid Off - 360		01-Apr-2005
1103403476 1			223,250.00		222,511.57			06-Jun-2005		7.000%		IL - 95.00%		Paid Off - 360		01-Mar-2005
1103403767 1			380,000.00		378,498.70			14-Jul-2005		7.250%		MA - 94.29%		Paid Off - 360		01-Mar-2005
1103403491 1			40,050.00		39,966.75			13-Jun-2005		7.875%		NY - 90.00%		Paid Off - 360		01-Apr-2005
1103403833 1			421,885.00		420,003.23			26-Jul-2005		6.625%		NJ - 95.00%		Paid Off - 360		01-Mar-2005
1103403509 1			89,100.00		88,839.56			24-Jun-2005		7.625%		AZ - 90.00%		Paid Off - 360		01-Mar-2005
1103403834 1			91,000.00		90,668.22			01-Jul-2005		6.500%		MN - 65.47%		Paid Off - 360		01-Apr-2005
1103403544 1			361,000.00		359,834.90			17-Jun-2005		7.125%		MA - 95.00%		Paid Off - 360		01-Mar-2005
1103403851 1			750,000.00		746,317.83			01-Jul-2005		6.125%		CA - 44.12%		Paid Off - 360		01-Mar-2005
1103403588 1			256,025.00		255,178.13			28-Jun-2005		7.000%		VA - 95.00%		Paid Off - 360		01-Mar-2005
1103403858 1			500,000.00		300,124.64			25-Jul-2005		7.000%		NH - 92.59%		Paid Off - 360		01-Mar-2005
1103403592 1			33,250.00		33,145.28			01-Jun-2005		7.250%		LA - 95.00%		Paid Off - 360		01-Mar-2005
1103403882 1			248,450.00		247,212.30			18-Jul-2005		7.250%		MD - 95.00%		Paid Off - 360		01-Mar-2005
1103403603 1			168,000.00		167,357.37			10-Jun-2005		6.250%		FL - 80.00%		Paid Off - 360		01-Mar-2005
1103403899 1			326,000.00		324,894.17			07-Jul-2005		6.875%		CA - 94.79%		Paid Off - 360		01-Apr-2005
1103403646 1			166,250.00		165,685.40			10-Jun-2005		6.875%		IL - 95.00%		Paid Off - 360		01-Mar-2005
1103403900 1			300,000.00		298,896.73			28-Jul-2005		6.500%		IL - 69.67%		Paid Off - 360		01-Apr-2005
1103403695 1			138,600.00		138,214.68			08-Jun-2005		7.875%		OH - 90.00%		Paid Off - 360		01-Mar-2005
1103403904 1			220,400.00		219,440.41			18-Jul-2005		6.750%		NJ - 95.00%		Paid Off - 360		01-Mar-2005
1103403745 1			256,500.00		255,896.06			06-Jun-2005		7.250%		VA - 95.00%		Paid Off - 360		01-Apr-2005
1103403936 1			56,000.00		55,840.33			13-Jul-2005		7.750%		LA - 70.00%		Paid Off - 360		01-Apr-2005
1103403748 1			225,990.00		225,312.79			06-Jun-2005		7.500%		OR - 90.00%		Paid Off - 360		01-Mar-2005
1103403938 1			99,900.00		99,615.20			12-Jul-2005		7.750%		MI - 90.00%		Paid Off - 360		01-Apr-2005
1103403754 1			370,500.00		369,274.53			01-Jun-2005		7.000%		MA - 95.00%		Paid Off - 360		01-Mar-2005
1103403942 1			56,700.00		56,530.08			14-Jul-2005		7.500%		LA - 70.00%		Paid Off - 360		01-Apr-2005
1103403762 1			147,150.00		146,803.52			23-Jun-2005		7.250%		WI - 90.00%		Paid Off - 360		01-Apr-2005
1103404026 1			500,000.00		497,906.36			22-Jul-2005		6.950%		CA - 86.96%		Paid Off - 360		01-Mar-2005
1103403847 1			#######		397,396.58			03-Jun-2005		7.500%		MD - 95.00%		Paid Off - 360		01-Mar-2005
1103404114 1			427,500.00		425,941.50			25-Jul-2005		6.500%		OR - 95.00%		Paid Off - 360		01-Apr-2005
1103403857 1			421,000.00		419,465.22			10-Jun-2005		6.500%		CO - 73.86%		Paid Off - 360		01-Mar-2005
1103404120 1			650,000.00		647,602.36			27-Jul-2005		6.625%		NY - 89.04%		Paid Off - 360		01-Apr-2005
1103403894 1			451,250.00		449,793.64			28-Jun-2005		7.125%		MD - 95.00%		Paid Off - 360		01-Mar-2005
1103404175 1			126,825.00		126,313.46			12-Jul-2005		7.625%		KS - 95.00%		Paid Off - 360		01-Mar-2005
1103403943 1			56,700.00		56,572.96			14-Jun-2005		7.500%		LA - 70.00%		Paid Off - 360		01-Apr-2005
1103404196 1			171,000.00		170,428.81			26-Jul-2005		6.950%		CA - 90.00%		Paid Off - 360		01-Apr-2005
1103404019 1			37,680.00		37,577.24			20-Jun-2005		6.500%		OH - 80.00%		Paid Off - 360		01-Apr-2005
1103404224 1			325,000.00		323,726.74			12-Jul-2005		6.125%		CA - 67.01%		Paid Off - 360		01-Apr-2005
1103404086 1			45,000.00		44,884.04			28-Jun-2005		8.250%		OH - 90.00%		Paid Off - 360		01-Mar-2005
1103404229 1			244,566.00		243,833.11			01-Jul-2005		7.500%		AZ - 85.81%		Paid Off - 360		01-Apr-2005
1103404101 1			420,847.00		419,553.48			24-Jun-2005		5.875%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103404296 1			306,000.00		305,083.05			25-Jul-2005		7.500%		CA - 90.00%		Paid Off - 360		01-Apr-2005
1103404106 1			201,000.00		200,467.02			02-Jun-2005		7.375%		RI - 60.00%		Paid Off - 360		01-Apr-2005
1103404327 1			116,000.00		115,643.64			19-Jul-2005		7.375%		PA - 80.00%		Paid Off - 360		01-Apr-2005
1103404127 1			204,250.00		203,590.77			27-Jun-2005		7.125%		FL - 95.00%		Paid Off - 360		01-Mar-2005
1103404338 1			90,000.00		89,709.54			05-Jul-2005		7.125%		UT - 89.11%		Paid Off - 360		01-Apr-2005
1103404181 1			194,750.00		194,256.35			30-Jun-2005		6.875%		CA - 95.00%		Paid Off - 360		01-Apr-2005
1103404353 1			380,000.00		378,643.28			15-Jul-2005		7.125%		IL - 95.00%		Paid Off - 360		01-Apr-2005
1103404185 1			351,976.00		351,187.43			20-Jun-2005		7.500%		CA - 90.00%		Paid Off - 360		01-Apr-2005
1103404374 1			263,200.00		262,482.30			26-Jul-2005		6.500%		MD - 65.80%		Paid Off - 360		01-May-2005
1103404262 1			60,750.00		60,623.75			07-Jun-2005		7.875%		TN - 90.00%		Paid Off - 360		01-Apr-2005
1103404447 1			237,800.00		237,138.90			25-Jul-2005		7.875%		NV - 89.99%		Paid Off - 360		01-Apr-2005
1103404269 1			393,750.00		392,729.32			29-Jun-2005		7.500%		CA - 90.00%		Paid Off - 360		01-Apr-2005
1103404448 1			218,700.00		217,784.19			12-Jul-2005		6.950%		IL - 89.98%		Paid Off - 360		01-Mar-2005
Page 22 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
&		Loan	Principal		Prepayment			Prepayment		Note		LTV at		&		Payment
Loan Group		Status	Balance		Amount			Date		Rate		Origination		Original Term		Date
1103404277 1			176,250.00		175,835.01			27-Jun-2005		7.250%		KS - 80.11%		Paid Off - 360		01-Apr-2005
1103404487 1			361,624.00		360,207.28			05-Jul-2005		6.125%		VA - 80.00%		Paid Off - 360		01-Apr-2005
1103404302 1			632,000.00		630,008.94			03-Jun-2005		6.625%		IL - 80.00%		Paid Off - 360		01-Apr-2005
1103404513 1			135,000.00		134,585.27			25-Jul-2005		7.375%		AZ - 90.00%		Paid Off - 360		01-Apr-2005
1103404315 1			215,000.00		214,339.15			23-Jun-2005		5.875%		NV - 64.56%		Paid Off - 360		01-Apr-2005
1103404546 1			205,813.00		205,040.19			21-Jul-2005		6.625%		TX - 95.00%		Paid Off - 360		01-Apr-2005
1103404319 1			385,300.00		384,436.77			02-Jun-2005		7.500%		VA - 89.99%		Paid Off - 360		01-Apr-2005
1103405364 1			1,000,000.00		1,000,000.00			12-Jul-2005		5.625%		CA - 78.01%		Paid Off - 360		01-May-2005
1103404328 1			386,950.00		386,060.04			27-Jun-2005		7.375%		VA - 90.00%		Paid Off - 360		01-Apr-2005
2503098282 1			307,300.00		307,300.00			20-Jul-2005		5.250%		CA - 70.00%		Paid Off - 360		01-May-2005
1103404357 1			238,500.00		237,849.65			20-Jun-2005		6.500%		NJ - 90.00%		Paid Off - 360		01-Apr-2005
2503098510 1			340,200.00		340,107.31			21-Jul-2005		6.375%		CA - 70.00%		Paid Off - 360		01-May-2005
1103404383 1			210,000.00		209,363.64			15-Jun-2005		5.950%		CA - 48.28%		Paid Off - 360		01-Apr-2005
2503100812 1			310,800.00		310,800.00			05-Jul-2005		4.875%		FL - 70.00%		Paid Off - 360		01-May-2005
1103404445 1			500,000.00		498,763.26			23-Jun-2005		7.000%		FL - 89.61%		Paid Off - 360		01-Apr-2005
2503101817 1			137,550.00		137,550.00			28-Jul-2005		5.375%		FL - 70.00%		Paid Off - 360		01-May-2005
1103404458 1			116,000.00		115,646.95			01-Jun-2005		6.950%		IL - 82.86%		Paid Off - 360		01-Apr-2005
2503102210 1			154,000.00		154,000.00			13-Jul-2005		6.375%		VA - 70.00%		Paid Off - 360		01-May-2005
1103404548 1			475,000.00		473,654.44			07-Jun-2005		6.950%		CA - 82.61%		Paid Off - 360		01-Apr-2005
2503103060 1			300,000.00		300,000.00			01-Jul-2005		7.000%		FL - 75.00%		Paid Off - 360		01-Jun-2005
1103404596 1			82,350.00		82,174.49			13-Jun-2005		7.750%		TN - 90.00%		Paid Off - 360		01-Apr-2005
2503103992 1			408,000.00		408,000.00			20-Jul-2005		6.375%		CA - 80.00%		Paid Off - 360		01-Jun-2005
1103412167 1			395,500.00		395,500.00			09-Jun-2005		5.500%		HI - 70.00%		Paid Off - 360		01-May-2005
2503104146 1			231,000.00		231,000.00			29-Jul-2005		5.750%		CA - 70.00%		Paid Off - 360		01-Jun-2005
2500025390 1			41,800.00		41,446.06			15-Jun-2005		11.990%		CA - 20.00%		Paid Off - 180		01-May-2003
3900007307 1			65,000.00		56,236.59			01-Jul-2005		14.490%		NE - 73.87%		Paid Off - 240		05-Sep-1997
2503100816 1			227,500.00		227,500.00			10-Jun-2005		6.250%		FL - 70.00%		Paid Off - 360		01-Jun-2005
3900010869 1			111,150.00		104,657.20			21-Jul-2005		6.000%		WA - 95.00%		Paid Off - 360		01-Jan-2002
2503101838 1			539,000.00		537,545.26			08-Jun-2005		4.375%		WA - 70.00%		Paid Off - 360		01-May-2005
3900010925 1			420,000.00		398,486.69			05-Jul-2005		6.875%		IL - 79.70%		Paid Off - 360		01-Feb-2002
2503102091 1			348,000.00		347,608.38			20-Jun-2005		8.875%		CA - 74.92%		Paid Off - 360		01-May-2005
3900010966 1			326,000.00		307,592.61			05-Jul-2005		6.625%		CA - 89.32%		Paid Off - 360		01-Feb-2002
2503102331 1			550,000.00		549,095.71			28-Jun-2005		7.000%		NC - 67.08%		Paid Off - 360		01-May-2005
3900010971 1			260,000.00		243,864.43			19-Jul-2005		6.000%		CA - 80.00%		Paid Off - 360		01-Feb-2002
2503102582 1			195,450.00		195,450.00			10-Jun-2005		5.500%		FL - 70.00%		Paid Off - 360		01-May-2005
3900010974 1			112,500.00		104,986.53			22-Jul-2005		7.125%		CA - 75.00%		Paid Off - 360		01-Feb-2002
2503102911 1			330,000.00		330,000.00			23-Jun-2005		6.750%		CA - 70.97%		Paid Off - 360		01-Jun-2005
3900010979 1			300,000.00		276,740.59			13-Jul-2005		6.500%		CA - 78.95%		Paid Off - 360		01-Feb-2002
2503103012 1			296,800.00		296,800.00			21-Jun-2005		5.000%		CA - 70.00%		Paid Off - 360		01-Jun-2005
3900011006 1			187,150.00		177,770.69			08-Jul-2005		5.500%		GA - 95.00%		Paid Off - 360		01-Mar-2002
2503103705 1			206,750.00		206,750.00			27-Jun-2005		11.375%		FL - 89.99%		Paid Off - 360		01-Jun-2005
3900011030 1			155,800.00		147,383.37			15-Jul-2005		5.500%		NV - 95.00%		Paid Off - 360		01-Mar-2002
2503104319 1			125,900.00		125,900.00			07-Jun-2005		6.125%		FL - 69.99%		Paid Off - 360		01-Jun-2005
3900011036 1			319,000.00		302,118.34			01-Jul-2005		6.125%		IL - 86.22%		Paid Off - 360		01-Apr-2002
2503104477 1			465,600.00		464,906.76			22-Jun-2005		7.500%		CA - 80.00%		Paid Off - 360		01-May-2005
3900011047 1			212,900.00		200,887.06			01-Jul-2005		5.750%		CA - 88.71%		Paid Off - 360		01-Apr-2002
2503106186 1			260,000.00		260,000.00			28-Jun-2005		6.625%		FL - 80.00%		Paid Off - 360		01-Jun-2005
3900011051 1			209,000.00		193,321.33			29-Jul-2005		5.500%		CA - 95.00%		Paid Off - 360		01-Mar-2002
3900010698 1			37,900.00		25,798.31			21-Jun-2005		12.380%		FL - 37.90%		Paid Off - 180		01-May-1997
3900011113 1			230,350.00		217,710.06			14-Jul-2005		5.750%		DC - 89.99%		Paid Off - 360		01-Mar-2002
3900010840 1			150,000.00		140,354.45			28-Jun-2005		5.625%		IL - 68.81%		Paid Off - 360		01-Dec-2001
3900011148 1			213,750.00		201,909.20			28-Jul-2005		5.875%		CA - 95.00%		Paid Off - 360		01-Mar-2002
3900010851 1			308,000.00		293,172.84			28-Jun-2005		6.250%		CA - 80.00%		Paid Off - 360		01-Jan-2002
3900011169 1			151,250.00		142,200.26			26-Jul-2005		5.500%		FL - 59.32%		Paid Off - 360		01-Apr-2002
3900010852 1			571,000.00		534,564.17			01-Jun-2005		4.750%		NY - 43.93%		Paid Off - 360		01-Mar-2002
3900011190 1			260,500.00		244,376.73			27-Jul-2005		6.000%		HI - 49.62%		Paid Off - 360		01-Feb-2002
3900010883 1			252,000.00		237,682.02			16-Jun-2005		5.125%		CA - 80.00%		Paid Off - 360		01-Feb-2002
3900011201 1			360,000.00		339,938.56			27-Jul-2005		5.250%		MI - 80.00%		Paid Off - 360		01-Mar-2002
3900010896 1			550,000.00		519,644.16			28-Jun-2005		5.750%		MI - 75.35%		Paid Off - 360		01-Sep-2001
3900011302 1			65,000.00		46,502.19			08-Jul-2005		13.000%		GA - 54.17%		Paid Off - 180		17-Nov-1997
3900010952 1			151,000.00		142,152.84			01-Jun-2005		5.250%		CA - 72.60%		Paid Off - 360		01-Mar-2002
3900011307 1			70,000.00		67,215.25			05-Jul-2005		7.875%		MO - 63.64%		Paid Off - 360		01-Jan-2002
3900010957 1			148,000.00		140,772.25			23-Jun-2005		5.375%		CA - 83.15%		Paid Off - 360		01-Feb-2002
3900011328 1			76,500.00		72,584.18			08-Jul-2005		6.500%		CA - 90.00%		Paid Off - 360		01-Aug-2002
3900010973 1			369,250.00		338,697.91			20-Jun-2005		6.000%		CA - 95.00%		Paid Off - 360		01-Feb-2002
3900011345 1			179,910.00		172,368.23			20-Jul-2005		6.500%		GA - 90.00%		Paid Off - 360		01-Aug-2002
3900010983 1			156,750.00		149,091.10			09-Jun-2005		5.625%		CA - 95.00%		Paid Off - 360		01-Feb-2002
3900011356 1			117,000.00		110,923.51			27-Jul-2005		6.000%		IL - 90.00%		Paid Off - 360		01-Aug-2002
3900010989 1			148,800.00		140,047.42			13-Jun-2005		5.125%		NY - 80.00%		Paid Off - 360		01-Feb-2002
3900011364 1			280,000.00		265,438.06			05-Jul-2005		5.500%		CA - 80.00%		Paid Off - 360		01-Aug-2002
3900010992 1			124,600.00		116,885.26			24-Jun-2005		5.000%		CA - 70.00%		Paid Off - 360		01-Feb-2002
3900011375 1			209,600.00		199,328.36			28-Jul-2005		5.500%		CA - 80.00%		Paid Off - 360		01-Aug-2002
3900010996 1			251,200.00		241,040.62			01-Jun-2005		5.500%		CA - 80.00%		Paid Off - 360		01-Feb-2002
3900011435 1			260,910.00		260,846.98			21-Jul-2005		6.250%		AZ - 90.00%		Paid Off - 360		01-Aug-2002
3900011057 1			72,000.00		69,424.32			28-Jun-2005		5.500%		VA - 90.00%		Paid Off - 360		01-Mar-2002
3900011437 1			212,000.00		200,789.16			01-Jul-2005		6.000%		CA - 80.00%		Paid Off - 360		01-Aug-2002
Page 23 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
&		Loan	Principal		Prepayment			Prepayment		Note		LTV at		&		Payment
Loan Group		Status	Balance		Amount			Date		Rate		Origination		Original Term		Date
3900011083 1			400,500.00		377,541.27			10-Jun-2005		5.750%		CA - 90.00%		Paid Off - 360		01-Mar-2002
3900011446 1			133,000.00		127,104.75			19-Jul-2005		6.250%		DC - 95.00%		Paid Off - 360		01-Aug-2002
3900011102 1			185,250.00		175,445.62			29-Jun-2005		5.500%		CA - 95.00%		Paid Off - 360		01-Apr-2002
3900011489 1			364,000.00		329,690.56			06-Jul-2005		6.250%		CA - 80.00%		Paid Off - 360		01-Aug-2002
3900011132 1			200,000.00		188,175.04			30-Jun-2005		5.125%		FL - 100.00%		Paid Off - 360		01-Feb-2002
3900011497 1			97,000.00		86,903.36			14-Jul-2005		5.500%		CT - 89.82%		Paid Off - 360		01-Sep-2002
3900011137 1			102,000.00		95,900.68			30-Jun-2005		6.250%		MI - 80.00%		Paid Off - 360		01-Jan-2002
3900011498 1			230,400.00		214,486.78			25-Jul-2005		6.000%		CA - 80.00%		Paid Off - 360		01-Aug-2002
3900011141 1			299,250.00		286,651.12			22-Jun-2005		5.375%		CA - 75.00%		Paid Off - 360		01-Feb-2002
3900011503 1			201,400.00		193,362.94			27-Jul-2005		6.250%		CA - 95.00%		Paid Off - 360		01-Aug-2002
3900011152 1			203,200.00		193,953.69			01-Jun-2005		5.500%		CA - 80.00%		Paid Off - 360		01-Mar-2002
3900011516 1			274,500.00		264,897.23			06-Jul-2005		6.250%		WA - 90.00%		Paid Off - 360		01-Aug-2002
3900011159 1			316,000.00		298,536.48			07-Jun-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Mar-2002
3900011541 1			244,800.00		232,576.46			14-Jul-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Sep-2002
3900011161 1			184,800.00		173,085.25			30-Jun-2005		5.125%		CA - 80.00%		Paid Off - 360		01-Feb-2002
3900011581 1			118,750.00		114,530.75			22-Jul-2005		6.375%		CA - 95.00%		Paid Off - 360		01-Sep-2002
3900011203 1			294,400.00		284,165.02			10-Jun-2005		6.500%		MD - 80.00%		Paid Off - 360		01-Feb-2002
3900011593 1			236,800.00		236,585.91			13-Jul-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Sep-2002
3900011229 1			188,800.00		177,046.92			03-Jun-2005		5.750%		CA - 80.00%		Paid Off - 360		01-Mar-2002
3900011595 1			208,000.00		198,402.00			05-Jul-2005		4.875%		CA - 58.60%		Paid Off - 360		01-Sep-2002
3900011231 1			132,450.00		126,092.60			10-Jun-2005		5.500%		CA - 79.99%		Paid Off - 360		01-Mar-2002
3900011620 1			108,500.00		103,679.79			28-Jul-2005		6.250%		CA - 70.00%		Paid Off - 360		01-Aug-2002
3900011260 1			320,000.00		306,900.78			22-Jun-2005		5.750%		FL - 80.00%		Paid Off - 360		01-Apr-2002
3900011681 1			283,500.00		271,267.82			19-Jul-2005		5.500%		MI - 90.00%		Paid Off - 360		01-Sep-2002
3900011321 1			150,000.00		143,589.86			08-Jun-2005		6.000%		CA - 12.15%		Paid Off - 360		01-Jul-2002
3900011685 1			326,400.00		326,110.65			01-Jul-2005		6.500%		CA - 80.00%		Paid Off - 360		01-Aug-2002
3900011327 1			290,400.00		275,954.65			21-Jun-2005		4.875%		CA - 80.00%		Paid Off - 360		01-Aug-2002
3900011710 1			230,200.00		215,941.74			25-Jul-2005		4.875%		WA - 74.26%		Paid Off - 360		01-Sep-2002
3900011350 1			161,910.00		156,914.04			23-Jun-2005		6.000%		LA - 90.00%		Paid Off - 360		01-Aug-2002
3900011720 1			257,450.00		257,450.00			28-Jul-2005		6.125%		CA - 95.00%		Paid Off - 360		01-Sep-2002
3900011382 1			183,350.00		167,487.51			23-Jun-2005		5.125%		CA - 95.00%		Paid Off - 360		01-Aug-2002
3900011729 1			137,250.00		132,977.26			22-Jul-2005		7.125%		FL - 90.00%		Paid Off - 360		01-Sep-2002
3900011394 1			288,025.60		273,551.69			02-Jun-2005		5.125%		CA - 80.00%		Paid Off - 360		01-Aug-2002
3900011745 1			198,800.00		189,025.37			20-Jul-2005		5.500%		CA - 90.00%		Paid Off - 360		01-Sep-2002
3900011417 1			127,800.00		124,409.37			13-Jun-2005		6.250%		MI - 90.00%		Paid Off - 360		01-Apr-2002
3900011759 1			400,000.00		400,000.00			07-Jul-2005		5.250%		CA - 94.12%		Paid Off - 360		01-Sep-2002
3900011442 1			434,500.00		414,373.24			22-Jun-2005		5.375%		CA - 68.11%		Paid Off - 360		01-Aug-2002
3900011772 1			295,000.00		284,358.07			07-Jul-2005		6.000%		CA - 67.36%		Paid Off - 360		01-Oct-2002
3900011549 1			151,350.00		144,865.52			08-Jun-2005		5.250%		WA - 80.00%		Paid Off - 360		01-Sep-2002
3900011777 1			140,000.00		136,010.46			12-Jul-2005		7.750%		CA - 80.00%		Paid Off - 360		01-Oct-2002
3900011557 1			336,000.00		336,000.00			20-Jun-2005		5.000%		CA - 80.00%		Paid Off - 360		01-Sep-2002
5500001470 2			530,000.00		528,416.93			15-Jul-2005		5.750%		CA - 61.63%		Paid Off - 360		01-May-2005
3900011570 1			385,000.00		365,733.49			08-Jun-2005		5.750%		VA - 74.04%		Paid Off - 360		01-Sep-2002
TOTAL			46,033,094.00		45,263,660.57
3900011572 1			306,000.00		306,000.00			07-Jun-2005		5.250%		CA - 77.47%		Paid Off - 360		01-Sep-2002
3900011574 1			280,000.00		279,799.80			30-Jun-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Sep-2002
3900011576 1			161,950.00		154,699.02			15-Jun-2005		5.500%		VA - 88.99%		Paid Off - 360		01-Sep-2002
3900011590 1			239,900.00		228,119.88			27-Jun-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Sep-2002
3900011637 1			196,000.00		186,674.21			16-Jun-2005		5.625%		CA - 70.00%		Paid Off - 360		01-Aug-2002
3900011688 1			247,500.00		236,744.90			28-Jun-2005		5.750%		CA - 90.00%		Paid Off - 360		01-Sep-2002
3900011697 1			646,750.00		616,167.83			09-Jun-2005		5.250%		MD - 64.68%		Paid Off - 360		01-Sep-2002
3900011730 1			288,000.00		276,403.40			27-Jun-2005		6.000%		NJ - 80.00%		Paid Off - 360		01-Oct-2002
3900011736 1			140,000.00		133,450.00			03-Jun-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Sep-2002
3900011753 1			116,800.00		116,781.33			09-Jun-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Oct-2002
3900011781 1			171,050.00		163,651.38			20-Jun-2005		5.500%		FL - 94.98%		Paid Off - 360		01-Oct-2002
3900011782 1			375,000.00		357,871.08			02-Jun-2005		5.750%		CA - 72.82%		Paid Off - 360		01-Oct-2002
1103372807 1			496,000.00		492,994.41			30-Jun-2005		5.990%		MS - 80.00%		Repur/Subs - 360		24-Dec-2004
1103399789 1			432,000.00		432,000.00			30-Jun-2005		8.125%		CA - 80.00%		Repur/Subs - 360		01-Apr-2005
TOTAL			51,656,471.60		51,004,936.51
Page 24 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Realized Loss Report
COLLATERAL REALIZED LOSSES
											Group 2		Group 1		Total
Current
Number of Loans Liquidated										0		0		0
Collateral Principal Realized Loss/(Gain) Amount										0.00		0.00		0.00
Collateral Interest Realized Loss/(Gain) Amount										0.00		0.00		0.00
Net Liquidation Proceeds										0.00		0.00		0.00
Cumulative
Number of Loans Liquidated										0		0		0
Collateral Realized Loss/(Gain) Amount										0.00		0.00		0.00
Net Liquidation Proceeds										0.00		0.00		0.00
Page 25 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
DEFAULT SPEEDS
											Group 2		Group 1		Total
MDR										0.00%		0.00%		0.00%
3 Months Avg MDR										0.00%		0.00%		0.00%
12 Months Avg MDR										0.00%		0.00%		0.00%
Avg MDR Since Cut-off										0.00%		0.00%		0.00%
CDR										0.00%		0.00%		0.00%
3 Months Avg CDR										0.00%		0.00%		0.00%
12 Months Avg CDR										0.00%		0.00%		0.00%
Avg CDR Since Cut-off										0.00%		0.00%		0.00%
SDA										0.00%		0.00%		0.00%
3 Months Avg SDA Approximation										0.00%		0.00%		0.00%
12 Months Avg SDA Approximation										0.00%		0.00%		0.00%
Avg SDA Since Cut-off Approximation										0.00%		0.00%		0.00%
Loss Severity Approximation for Current Period										0.00%		0.00%		0.00%
3 Months Avg Loss Severity Approximation										0.00%		0.00%		0.00%
12 Months Avg Loss Severity Approximation										0.00%		0.00%		0.00%
Avg Loss Severity Approximation Since Cut-off										0.00%		0.00%		0.00%
Page 26 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY
	Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)
	Conditional Default Rate (CDR): 1-((1-MDR)^12)
	SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)0.02,MAX(0.03,MIN(30,WAS)0.02-0.0095*(WAS-60)))
	Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn)(1-MDRn+1)...*(1-MDRm)]^(1/months in period n,m)
	Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)
	Average SDA Approximation over period between the nth month and mth month:
	AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)0.02,MAX(0.03,MIN(30,Avg WASn,m)0.02-0.0095*(Avg WASn,m-60)))
	Average WASn,m: (WASn + WASn+1 +...+ WASm )/(number of months in the period n,m)
	Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)
	Average Loss Severity Approximation over period between nth month and mth month: Avg(Loss Severityn,m)
	Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.
	Dates correspond to distribution dates.
Page 27 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Realized Loss Detail Report
Loan Number			Current		State &				Prior		Realized				Cumulative
&		Loan	Note		LTV at		Original		Principal		Loss/(Gain)		Realized		Realized
Loan Group		Status	Rate		Origination		Term		Balance		Revision		Loss/(Gain)		Loss/(Gain)
TOTAL
Page 28 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Triggers and Adj. Cert. Report
TRIGGER EVENTS
										Group 2		Group 1		Total
						Has Step_down Condition Occurred (0=No,1=Yes)								0
ADJUSTABLE RATE CERTIFICATE INFORMATION
SPACE INTENTIONALLY LEFT BLANK
ADDITIONAL INFORMATION
										Group 2		Group 1		Total
Current LIBOR														3.~~314380~~460000%
Next LIBOR														3.~~460000~~641250%
Page 29 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Additional Certificate Report
ADDITIONAL CERTIFICATE REPORT
													Next Pass Through Rate		NET WAC Shortfall Paid
CLASS
			1-A-1A										3.7391%		$0.00
			1-A-1B										3.6391%		$0.00
			1-A-2										3.8098%		$0.00
			1-A-IO										0.00%		$0.00
			2-A-1										4.0624%		$0.00
			2-A-2										4.2240%		$0.00
			1-M-1										34.8907%		$0.00
			1-M-2										34.9210%		$0.00
			1-M-3										34.9412%		$0.00
			1-M-4										4.1129%		$0.00
			1-M-5										4.1432%		$0.00
			1-M-6										4.2139%		$0.00
			2-M-1										4.2139%		$0.00
			2-M-2										4.5977%		$0.00
			1-B-1										4.7694%		$~~105~~0.7100
			1-B-2										5.2139%		~~#######~~$0.00
			2-B-1										56.9412%		$0.00
			2-B-2										7.8199%		$0.00
			CERT										0.00%		$0.00
Page 30 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
July 25, 2005 Distribution
August 25, 2005 Distribution
Other Related Information
ADDITIONAL INFORMATION
										Group 2		Group 1		Total
Reference Risk ID 934099L - Lehman														~~441~~325,~~304~~090.9127
Reference Risk ID 934131L - Lehman														~~140~~104,~~330~~452.6197
Reference Risk ID 937613L - Lehman														0.00
Reference Risk ID 934123L - Lehman														~~293~~242,~~929~~227.7997
Reference Risk ID 934095L - Lehman														4231,~~452~~367.3134
Reference Risk ID 934115L - Lehman														137,~~086~~521.4694
Reference Risk ID 934145L - Lehman														0.00
Reference Risk ID CXIMP054B1 - Bear														3316,~~305~~236.3870
Total Derivatives Outflow/(Inflow) Net Amount														~~964~~726,~~409~~897.5019
Total Derivatives Outflow/(Inflow) Net Amount - GROUP 1														688,007.91
Total Derivatives Outflow/(Inflow) Net Amount - GROUP 2														38,889.28
Page 31 of 31

Filing Compare · IMH ASSETS CORP., COLLATERALIZED ASSET-BACKED BONDS, SERIES 2005-4