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): ~~June~~July 2725, 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 ~~June~~July 2725, 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: ~~Jun~~Jul 3027, 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 ~~June~~July 2725, 2005.

Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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					2425
										11. Realized Loss Detail Report					2728
				Servicer(s)
										12. Triggers and Adj. Cert. Report					2829
				Impac Funding Corp.
										13. Additional Certificate Report					2930
										14. Other Related Information					3031
				Underwriter(s)
				UBS Warburg, London
				Countrywide Funding Corporation
				Bear Stearns & Co.
										Total Number of Pages					3031
				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:			~~June~~July 2725, 2005
										Factor Information:			(800) 735-7777
				Record Date:			~~May~~June 3130, 2005
										Main Phone Number:			(714) 247-6000
							June 24, 2005
							July 22, 2005
										https://www.tss.db.com/invr
Page 1 of 30
Page 1 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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		1,~~039~~018,~~554~~276,~~153~~230.8864		32,~~201~~838,~~826~~802.7952		2130,~~277~~408,~~923~~267.2471		2433,~~479~~247,~~750~~070.0323		0.00		0.00		1987,~~018~~867,~~276,230~~962.6493
1-A-1B		$	200,000,000.00		~~198~~194,~~420~~359,~~573~~238.1813		~~611~~526,~~135~~727.3779		45,~~061~~804,~~335~~051.0556		46,~~672~~330,~~470~~779.4235		0.00		0.00		~~194~~188,~~359~~555,~~238~~186.1357
1-A-2		$	138,648,000.00		~~137~~134,~~553~~737,~~078~~598.1524		~~432~~382,~~489~~964.8008		24,~~815~~023,~~479~~600.9170		34,~~247~~406,~~969~~564.7178		0.00		0.00		~~134~~130,~~737~~713,~~598~~997.2454
1-A-IO		$	0.00		0.00		~~956~~843,~~250~~750.00		0.00		~~956~~843,~~250~~750.00		0.00		0.00		0.00
2-A-1		$	62,027,000.00		61,~~817~~692,~~491~~742.0075		~~192~~173,~~097~~429.8568		~~124~~153,~~748~~100.2598		~~316~~326,~~846~~530.1066		0.00		0.00		61,~~692~~539,~~742~~641.7577
2-A-2		$	13,336,000.00		13,~~290~~264,~~954~~133.9164		4238,~~276~~113.3125		2632,~~821~~917.2719		6971,~~097~~030.5844		0.00		0.00		13,~~264~~231,~~133~~216.6445
1-M-1		$	162,956,000.00		~~161~~158,~~669~~360,~~114~~020.6205		~~521~~461,~~652~~191.3418		34,~~309~~729,~~094~~025.5713		35,~~830~~190,~~746~~216.9131		0.00		0.00		~~158~~153,~~360~~630,~~020~~994.0592
1-M-2		$	84,629,000.00		8382,~~960~~242,~~673~~139.4482		~~273~~241,~~222~~432.0240		12,~~718~~455,~~533~~955.6240		12,~~991~~697,~~755~~387.6480		0.00		0.00		8279,~~242~~786,~~139~~184.8242
1-M-3		$	45,015,000.00		4443,~~659~~745,~~510~~405.5152		~~146~~129,~~148~~100.2576		~~914~~1,~~104~~306,346.9990		1,~~060~~435,~~253~~447.2466		0.00		0.00		4342,~~745~~439,~~405~~058.5262
1-M-4		$	27,009,000.00		26,~~795~~247,~~706~~243.3132		9180,~~864~~930.6193		~~548~~783,~~462~~808.9914		~~640~~864,~~327~~739.6007		0.00		0.00		2625,~~247~~463,~~243~~435.3218
1-M-5		$	28,810,000.00		2827,~~582~~997,~~483~~448.5726		9886,~~776~~980.3079		~~585~~836,~~035~~073.3163		~~683~~923,~~811~~054.6142		0.00		0.00		27,~~997~~161,~~448~~374.2663
1-M-6		$	22,508,000.00		2221,~~330~~873,~~251~~188.3166		7869,~~602~~145.4918		~~457~~653,~~062~~187.6596		~~535~~722,~~665~~333.14		0.00		0.00		21,~~873~~220,~~188~~000.6670
2-M-1		$	7,443,000.00		7,~~417~~402,~~859~~890.7342		2421,~~410~~962.9445		1418,~~969~~371.3153		3940,~~380~~333.2598		0.00		0.00		7,~~402~~384,~~890~~518.4289
2-M-2		$	11,165,000.00		11,~~127~~104,~~287~~832.9194		3935,~~168~~104.0543		2227,~~454~~558.9752		6162,~~623~~662.0295		0.00		0.00		11,~~104~~077,~~832~~274.9442
1-B-1		$	25,209,000.00		2524,~~009~~498,~~921~~010.1415		~~100~~87,~~644~~922.0943		~~511~~731,~~910~~571.9969		~~612~~819,~~555~~494.0812		0.00		0.00		2423,~~498~~766,~~010~~438.1546
1-B-2		$	18,006,000.00		17,~~863~~498,~~804~~162.2021		7968,~~255~~924.7460		~~365~~522,~~641~~538.9976		~~444~~591,~~897~~463.7336		0.00		0.00		1716,~~498~~975,~~162~~623.2145
2-B-1		$	17,368,000.00		17,~~309~~274,~~335~~405.9959		7566,~~209~~699.0667		3442,~~930~~869.4036		~~110~~109,~~139~~569.4603		0.00		0.00		17,~~274~~231,~~405~~536.5923
2-B-2		$	10,358,000.00		10,~~323~~302,~~013~~181.7280		46,~~810~~716.3825		2025,~~831~~566.9261		6772,~~642~~282.3086		0.00		0.00		10,~~302~~276,~~181~~615.8019
CERT		$	1,922,316,000.00		0.00		~~911~~1,~~874~~620,496.2268		0.00		~~911~~1,~~874~~620,496.2268		0.00		0.00		0.00
Total			3,844,632,000.00		1,~~907~~870,~~685~~875,~~213~~872.5714		7,~~923~~820,~~714~~395.6107		3652,~~809~~554,~~341~~811.4377		4460,~~733~~375,~~056~~206.0484		0.00		0.00		1,~~870~~818,~~875~~321,~~872~~060.1437
Page 2 of 30
Page 2 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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	0506/2527/05		0607/2624/05		A-Act/360		45254NPA9		1,047,829,000.00		~~992~~971.~~102866~~796191		32.~~055677~~709223		2029.~~306675~~020258		2331.~~362352~~729481	~~971~~942.~~796191~~775933
1-A-1B	0506/2527/05		0607/2624/05		A-Act/360		45254NPB7		200,000,000.00		~~992~~971.~~102866~~796191		32.~~055677~~633639		2029.~~306675~~020258		2331.~~362352~~653897	~~971~~942.~~796191~~775933
1-A-2	0506/2527/05		0607/2624/05		A-Act/360		45254NPC5		138,648,000.00		~~992~~971.~~102866~~796191		32.~~119337~~762132		2029.~~306675~~020258		2331.~~426012~~782390	~~971~~942.~~796191~~775933
1-A-IO	0506/01/05		0506/30/05		F-30/360		45254NPD3		1,800,000,000.00		~~850~~750.000000		0.~~531250~~468750		0.000000		0.~~531250~~468750	~~750~~650.000000
2-A-1	0506/2527/05		0607/2624/05		A-Act/360		45254NPE1		62,027,000.00		~~996~~994.~~622294~~611101		32.~~097004~~796035		2.~~011193~~468296		5.~~108196~~264331	~~994~~992.~~611101~~142805
2-A-2	0506/2527/05		0607/2624/05		A-Act/360		45254NPF8		13,336,000.00		~~996~~994.~~622294~~611101		32.~~170089~~857922		2.~~011193~~468296		5.~~181282~~326218	~~994~~992.~~611101~~142805
1-M-1	0506/2527/05		0607/2624/05		A-Act/360		45254NPG6		162,956,000.00		~~992~~971.~~102866~~796191		32.~~201185~~830158		2029.~~306675~~020258		2331.~~507860~~850416	~~971~~942.~~796191~~775933
1-M-2	0506/2527/05		0607/2624/05		A-Act/360		45254NPH4		84,629,000.00		~~992~~971.~~102866~~796191		32.~~228468~~852833		2029.~~306675~~020258		2331.~~535143~~873091	~~971~~942.~~796191~~775933
1-M-3	0506/2527/05		0607/2624/05		A-Act/360		45254NPJ0		45,015,000.00		~~992~~971.~~102866~~796191		32.~~246657~~867950		2029.~~306675~~020258		2331.~~553332~~888207	~~971~~942.~~796191~~775933
1-M-4	0506/2527/05		0607/2624/05		A-Act/360		45254NPK7		27,009,000.00		~~992~~971.~~102866~~796191		32.~~401259~~996443		2029.~~306675~~020258		2332.~~707934~~016701	~~971~~942.~~796191~~775933
1-M-5	0506/2527/05		0607/2624/05		A-Act/360		45254NPL5		28,810,000.00		~~992~~971.~~102866~~796191		3.~~428542~~019118		2029.~~306675~~020258		2332.~~735217~~039376	~~971~~942.~~796191~~775933
1-M-6	0506/2527/05		0607/2624/05		A-Act/360		45254NPM3		22,508,000.00		~~992~~971.~~102866~~796191		3.~~492202~~072027		2029.~~306675~~020258		2332.~~798878~~092285	~~971~~942.~~796191~~775933
2-M-1	0506/2527/05		0607/2624/05		A-Act/360		45254NPN1		7,443,000.00		~~996~~994.~~622293~~611100		32.~~279718~~950752		2.~~011193~~468296		5.~~290911~~419049	~~994~~992.~~611100~~142804
2-M-2	0506/2527/05		0607/2624/05		A-Act/360		45254NPP6		11,165,000.00		~~996~~994.~~622294~~611101		3.~~508110~~144150		2.~~011193~~468296		5.~~519303~~612445	~~994~~992.~~611101~~142805
1-B-1	0506/2527/05		0607/2624/05		A-Act/360		45254NPQ4		25,209,000.00		~~992~~971.~~102866~~796190		3.~~992387~~487740		2029.~~306676~~020258		2432.~~299063~~507998	~~971~~942.~~796190~~775932
1-B-2	0506/2527/05		0607/2624/05		A-Act/360		45254NPR2		18,006,000.00		~~992~~971.~~102866~~796191		43.~~401629~~827868		2029.~~306675~~020258		2432.~~708304~~848126	~~971~~942.~~796191~~775933
2-B-1	0506/2527/05		0607/2624/05		A-Act/360		45254NPS0		17,368,000.00		~~996~~994.~~622293~~611100		43.~~330324~~840377		2.~~011193~~468296		6.~~341517~~308673	~~994~~992.~~611100~~142805
2-B-2	0506/2527/05		0607/2624/05		A-Act/360		45254NPT8		10,358,000.00		~~996~~994.~~622294~~611103		4.~~519249~~510161		2.~~011191~~468296		6.~~530440~~978457	~~994~~992.~~611103~~142807
CERT	0506/01/05		0506/30/05		A-30/360				1,922,316,000.00		0.000000		0.~~474362~~842992		0.000000		0.~~474362~~842992	0.000000
Page 3 of 30
Page 3 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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		57,~~059~~898,~~976~~779.8840		2858,~~481~~367,~~143~~723.7421		1,~~071~~593,~~625~~313.6286		2959,~~552~~961,~~769~~037.3607		3467,~~612~~859,~~746~~816.2447		0.00		0.00		1987,~~018~~867,~~276,230~~962.6493
1-A-1B	200,000,000.00		~~955~~1,~~246~~481,974.4827		511,~~436~~140,~~219~~696.7928		~~204~~304,~~542~~117.0815		511,~~640~~444,~~761~~813.8743		612,~~596~~926,~~008~~787.3570		0.00		0.00		~~194~~188,~~359~~555,~~238~~186.1357
1-A-2	138,648,000.00		~~683~~1,~~481~~066,445.1927		37,~~768~~723,~~605~~176.0129		~~141~~210,~~796~~826.7517		37,~~910~~934,~~401~~002.7646		49,~~593~~000,~~882~~447.9573		0.00		0.00		~~134~~130,~~737~~713,~~598~~997.2454
1-A-IO	0.00		2,~~081~~925,~~250~~000.00		0.00		0.00		0.00		2,~~081~~925,~~250~~000.00		0.00		0.00		0.00
2-A-1	62,027,000.00		~~303~~476,~~074~~504.4917		~~317~~467,~~398~~872.0137		1619,~~859~~485.2486		~~334~~487,~~257~~358.2523		~~637~~963,~~331~~862.7440		0.00		0.00		61,~~692~~539,~~742~~641.7577
2-A-2	13,336,000.00		66104,~~699~~812.7196		68100,~~241~~594.5703		34,~~624~~189.7952		71104,~~866~~783.3655		~~138~~209,~~566~~596.0751		0.00		0.00		13,~~264~~231,~~133~~216.6445
1-M-1	162,956,000.00		~~824~~1,~~388~~285,579.3856		49,~~429~~077,~~323~~216.1551		~~166~~247,~~656~~788.8057		49,~~595~~325,~~979~~005.9508		510,~~420~~610,~~368~~584.3364		0.00		0.00		~~158~~153,~~360~~630,~~020~~994.0592
1-M-2	84,629,000.00		~~431~~673,~~783~~216.8525		24,~~300~~714,~~309~~129.2293		86128,~~550~~685.9665		24,~~386~~842,~~860~~815.1858		25,~~818~~516,~~644~~031.0383		0.00		0.00		8279,~~242~~786,~~139~~184.8242
1-M-3	45,015,000.00		~~230~~360,~~964~~064.0177		12,~~223~~507,~~557~~492.1721		4668,~~037~~449.3117		12,~~269~~575,~~594~~941.4838		12,~~500~~936,~~558~~006.4915		0.00		0.00		4342,~~745~~439,~~405~~058.5262
1-M-4	27,009,000.00		~~145~~226,~~177~~108.3831		~~734~~1,~~134~~504,495.3032		2741,~~622~~069.3850		~~761~~1,~~756~~545,564.6882		~~906~~1,~~934~~771,673.0613		0.00		0.00		2625,~~247~~463,~~243~~435.3218
1-M-5	28,810,000.00		~~156~~243,~~100~~080.2099		~~783~~1,~~087~~604,817.4529		2943,~~464~~808.2908		~~812~~1,~~551~~648,625.7437		~~968~~1,~~651~~891,706.9436		0.00		0.00		27,~~997~~161,~~448~~374.2663
1-M-6	22,508,000.00		~~124~~193,~~218~~363.7088		~~611~~1,~~792~~253,773.1796		2334,~~019~~225.1734		~~634~~1,~~811~~287,999.3430		~~759~~1,~~030~~481,363.0418		0.00		0.00		21,~~873~~220,~~188~~000.6670
2-M-1	7,443,000.00		3860,~~513~~475.3681		3856,~~086~~142.5488		2,~~023~~338.0423		4058,~~109~~481.5811		78118,~~622~~956.9492		0.00		0.00		7,~~402~~384,~~890~~518.4289
2-M-2	11,165,000.00		6196,~~795~~900.7821		5784,~~132~~218.3608		3,~~034~~507.7050		6087,~~167~~725.0658		~~121~~184,~~962~~625.8479		0.00		0.00		11,~~104~~077,~~832~~274.9442
1-B-1	25,209,000.00		~~159~~246,~~051~~974.9437		~~685~~1,~~208~~404,229.3409		2538,~~781~~332.5145		~~710~~1,~~989~~442,561.8554		~~870~~1,~~041~~689,535.7991		0.00		0.00		2423,~~498~~766,~~010~~438.1546
1-B-2	18,006,000.00		~~125~~194,~~251~~175.0767		~~489~~1,~~422~~002,996.8788		1827,~~414~~379.9267		~~507~~1,~~837~~030,376.7955		~~633~~1,~~088~~224,552.8622		0.00		0.00		1716,~~498~~975,~~162~~623.2145
2-B-1	17,368,000.00		~~118~~185,~~658~~357.0168		88131,~~873~~007.7059		45,~~720~~456.7118		93136,~~594~~463.4177		~~212~~321,~~252~~821.4245		0.00		0.00		17,~~274~~231,~~405~~536.5923
2-B-2	10,358,000.00		79126,~~556~~272.0530		5378,~~002~~130.8583		23,~~815~~253.3598		5581,~~818~~384.2081		~~135~~207,~~374~~657.2511		0.00		0.00		10,~~302~~276,~~181~~615.8019
CERT	1,922,316,000.00		46,~~434~~054,~~421~~918.3301		0.00		0.00		0.00		46,~~434~~054,~~421~~918.3301		0.00		0.00		0.00
Total	3,844,632,000.00		1623,~~079~~900,~~608~~003.8188		49101,~~565~~218,~~538~~712.2475		12,~~874~~776,~~589~~226.6288		51103,~~440~~994,~~127~~939.8663		67127,~~519~~894,~~736~~943.6751		0.00		0.00		1,~~870~~818,~~875~~321,~~872~~060.1437
Page 4 of 30
Page 4 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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.~~36000~~58438%		1,~~039~~018,~~554~~276,~~153~~230.8864		32,~~201~~838,~~826~~802.7952		0.00		0.00		0.00		32,~~201~~838,~~826~~802.7952		32,~~201~~838,~~826~~802.7952		0.00
1-A-1B	3.~~36000~~48438%		~~198~~194,~~420~~359,~~573~~238.1813		~~611~~526,~~135~~727.3779		0.00		0.00		0.00		~~611~~526,~~135~~727.3779		~~611~~526,~~135~~727.3779		0.00
1-A-2	3.~~43000~~65438%		~~137~~134,~~553~~737,~~078~~598.1524		~~432~~382,~~489~~964.8008		0.00		0.00		0.00		~~432~~382,~~489~~964.8008		~~432~~382,~~489~~964.8008		0.00
1-A-IO	0.75000%		1,~~530~~350,000,000.00		~~956~~843,~~250~~750.00		0.00		0.00		0.00		~~956~~843,~~250~~750.00		~~956~~843,~~250~~750.00		0.00
2-A-1	3.~~39000~~61438%		61,~~817~~692,~~491~~742.0075		~~192~~173,~~097~~429.8568		0.00		0.00		0.00		~~192~~173,~~097~~429.8568		~~192~~173,~~097~~429.8568		0.00
2-A-2	3.~~47000~~69438%		13,~~290~~264,~~954~~133.9164		4238,~~276~~113.3125		0.00		0.00		0.00		4238,~~276~~113.3125		4238,~~276~~113.3125		0.00
1-M-1	3.~~52000~~74438%		~~161~~158,~~669~~360,~~114~~020.6205		~~521~~461,~~652~~191.3418		0.00		0.00		0.00		~~521~~461,~~652~~191.3418		~~521~~461,~~652~~191.3418		0.00
1-M-2	3.~~55000~~77438%		8382,~~960~~242,~~673~~139.4482		~~273~~241,~~222~~432.0240		0.00		0.00		0.00		~~273~~241,~~222~~432.0240		~~273~~241,~~222~~432.0240		0.00
1-M-3	3.~~57000~~79438%		4443,~~659~~745,~~510~~405.5152		~~146~~129,~~148~~100.2576		0.00		0.00		0.00		~~146~~129,~~148~~100.2576		~~146~~129,~~148~~100.2576		0.00
1-M-4	3.~~66034~~96438%		26,~~795~~247,~~706~~243.3132		8980,~~907~~930.9093		0.00		0.00		0.00		8980,~~907~~930.9093		9180,~~864~~930.6193		0.00
1-M-5	3.~~66034~~99438%		2827,~~582~~997,~~483~~448.5726		9586,~~903~~980.1079		0.00		0.00		0.00		9586,~~903~~980.1079		9886,~~776~~980.3079		0.00
1-M-6	34.~~66034~~06438%		2221,~~330~~873,~~251~~188.3166		7469,~~924~~145.9218		0.00		0.00		0.00		7469,~~924~~145.9218		7869,~~602~~145.4918		0.00
2-M-1	3.~~59000~~81438%		7,~~417~~402,~~859~~890.7342		2421,~~410~~962.9445		0.00		0.00		0.00		2421,~~410~~962.9445		2421,~~410~~962.9445		0.00
2-M-2	34.~~84000~~06438%		11,~~127~~104,~~287~~832.9194		3935,~~168~~104.0543		0.00		0.00		0.00		3935,~~168~~104.0543		3935,~~168~~104.0543		0.00
1-B-1	34.~~66034~~60883%		2524,~~009~~498,~~921~~010.1415		8387,~~916~~816.0472		0.00		0.00		0.00		8387,~~916~~816.0472		~~100~~87,~~644~~922.0943		0.00
1-B-2	34.~~66034~~60883%		17,~~863~~498,~~804~~162.2021		5962,~~938~~724.6074		0.00		0.00		0.00		5962,~~938~~724.6074		7968,~~255~~924.7460		0.00
2-B-1	4.~~74000~~96438%		17,~~309~~274,~~335~~405.9959		7566,~~209~~699.0667		0.00		0.00		0.00		7566,~~209~~699.0667		7566,~~209~~699.0667		0.00
2-B-2	45.~~94680~~83020%		10,~~323~~302,~~013~~181.7280		46,~~810~~716.3825		0.00		0.00		0.00		46,~~810~~716.3825		46,~~810~~716.3825		0.00
CERT	0.00000%		0.00		0.00		0.00		0.00		0.00		0.00		~~911~~1,~~874~~620,496.2268		0.00
Total			3,~~437~~220,~~685~~875,~~213~~872.5714		6,~~967~~193,~~287~~592.7282		0.00		0.00		0.00		6,~~967~~193,~~287~~592.7282		7,~~923~~820,~~714~~395.6107		0.00
Page 5 of 30
Page 5 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
Collection Account Report
SUMMARY
										Group 2		Group 1		Total
Principal Collections										~~102~~120,~~701~~844.8369		3652,~~564~~254,~~585~~427.3158		3652,~~667~~375,~~287~~272.1427
Principal Withrawals										0.00		0.00		0.00
Principal Other Accounts										0.00		0.00		0.00
TOTAL NET PRINCIPAL										~~102~~120,~~701~~844.8369		3652,~~564~~254,~~585~~427.3158		3652,~~667~~375,~~287~~272.1427
Interest Collections										~~562~~561,~~202~~740.4767		8,~~831~~639,~~541~~719.0837		9,~~393~~201,~~743~~460.5504
Interest Withdrawals										-0.00		-0.00		-0.00
Interest Other Accounts										0.00		(1762,~~148,552~~989.3471)		(1762,~~148,552~~989.3471)
Interest Fees										-175.5944		-~~405~~438,~~111~~360.0832		-~~405~~438,~~286~~535.6776
TOTAL NET INTEREST										~~562~~561,~~026~~565.8923		7,~~277~~438,~~877~~369.6634		7,~~839~~999,~~904~~934.5457
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION										~~664~~682,~~728~~409.7292		4359,~~842~~692,~~462~~796.9792		4460,~~507~~375,~~191~~206.6884
PRINCIPAL - COLLECTIONS
											Group 2		Group 1		Total
Scheduled Principal Received											~~106~~125,~~043~~820.6057		~~807~~775,~~383~~816.1969		~~913~~901,~~426~~637.7926
Curtailments											-34,~~341~~975.7788		~~177~~473,~~939~~674.9638		~~174~~468,~~598~~698.1950
Prepayments In Full											0.00		3550,~~579~~079,~~262~~942.1610		3550,~~579~~079,~~262~~942.1610
Repurchased/Substitutions											0.00		0924,994.0041		0924,994.0041
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											-~~106~~125,~~043~~820.6057		-~~416~~422,~~122~~767.2604		-~~522~~548,~~165~~587.8661
Realized Losses											-0.00		-0.00		-0.00
Advanced Principal											~~106~~125,~~043~~820.6057		~~416~~422,~~122~~767.2604		~~522~~548,~~165~~587.8661
TOTAL PRINCIPAL COLLECTED											~~102~~120,~~701~~844.8369		3652,~~564~~254,~~585~~427.3158		3652,~~667~~375,~~287~~272.1427
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 30
Page 6 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
INTEREST - COLLECTIONS
										Group 2		Group 1		Total
Scheduled Interest										~~579~~578,~~038~~562.0429		98,~~029~~840,~~752~~911.4687		9,~~608~~419,~~790~~474.5016
Repurchased/Substitution Interest										0.00		05,385.0086		05,385.0086
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										-0.00		-79110,~~358~~714.3219		-79110,~~358~~714.3219
Delinquent Interest										-~~579~~578,~~038~~562.0429		-3,~~138~~246,~~739~~195.5797		-3,~~717~~824,~~777~~758.6126
Compensating Interest										0.00		79110,~~358~~714.3219		79110,~~358~~714.3219
Civil Relief Act Shortfalls										-0.00		-0.00		-0.00
Interest Advanced										~~562~~561,~~202~~740.4867		23,~~940~~039,~~528~~617.1960		3,~~502~~601,~~730~~358.6727
TOTAL INTEREST COLLECTED										~~562~~561,~~202~~740.4767		8,~~831~~639,~~541~~719.0837		9,~~393~~201,~~743~~460.5504
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														67201,~~700~~419.8979
Deriviative Contract Payments														1964,~~216,253~~409.2350
TOTAL INTEREST OTHER ACCOUNTS										0.00		-1762,~~148,552~~989.3471		-1762,~~148,552~~989.3471
INTEREST - FEES
										Group 2		Group 1		Total
Servicing Fees										0.00		~~402~~381,~~580~~916.3579		~~402~~381,~~580~~916.3579
Owner Trustee Fee										175.5944		2,~~530~~478.7393		2,~~706~~654.3237
Primary Mortgage Insurance														053,964.0060
TOTAL INTEREST FEES										175.5944		~~405~~438,~~111~~360.0832		~~405~~438,~~286~~535.6776
Page 7 of 30
Page 7 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
Credit Enhancement Report
ACCOUNTS
RESERVE
Reserve Funds Distribution to Certificate Holders						446,~~552~~305.6757
Required Reserve Funds Deposited						446,~~552~~305.6757
Releases						0.00
INSURANCE
SPACE INTENTIONALLY LEFT BLANK
STRUCTURAL FEATURES
										Group 2		Group 1		Total
Overcollateralized Amount/(Undercollateralized Amount)										2,~~798~~978,~~952~~491.2777		0.00		2,~~798~~978,~~952~~491.2777
Overcollateralization Release Amount										0.00		0.00		0.00
Overcollateralization Deficiency Amount										1,~~375~~232,~~003~~949.9970		0.00		1,~~375~~232,~~003~~949.9970
Overcollateralization Target Amount										4,031,901.97		0.00		4,031,901.97
Page 8 of 30
Page 8 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
Collateral Report
COLLATERAL
											Group 2		Group 1		Total
Loan Count:
Original										103		7,292		7,395
Prior										103		7,~~236~~094		7,~~339~~197
Prefunding										0		0		0
Scheduled Paid Offs										-0		-0		-0
Full Voluntary Prepayments										-0		-~~142~~185		-~~142~~185
Repurchases										-0		-02		-02
Liquidations										-0		-0		-0
Current										103		76,~~094~~907		7,~~197~~010
Principal Balance:
Original										124,058,522.19		1,800,593,709.86		1,924,652,232.05
Prior										123,~~942~~840,~~841~~139.2441		1,~~786~~749,~~399~~834,~~270~~685.3100		1,~~910~~873,~~342~~674,~~111~~824.5541
Prefunding										0.00		0.00		0.00
Scheduled Principal										-~~106~~125,~~043~~820.6057		-~~807~~775,~~383~~816.1969		-~~913~~901,~~426~~637.7926
Partial Prepayments										(34,~~341~~975.7788)		-~~177~~473,~~939~~674.9638		-~~174~~468,~~598~~698.1950
Full Voluntary Prepayments										-0.00		-3550,~~579~~079,~~262~~942.1610		-3550,~~579~~079,~~262~~942.1610
Repurchases										-0.00		-0924,994.0041		-0924,994.0041
Liquidations										-0.00		-0.00		-0.00
Current										123,~~840~~719,~~139~~294.4172		1,~~749~~697,~~834~~580,~~685~~257.0042		1,~~873~~821,~~674~~299,~~824~~552.4114
PREFUNDING
SPACE INTENTIONALLY LEFT BLANK
Page 9 of 30
Page 9 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
CHARACTERISTICS
										Group 2		Group 1		Total
Weighted Average Coupon Original										5.60611%		6.06652%		6.03684%
Weighted Average Coupon Prior										5.~~60611~~60618%		6.~~06652~~06567%		6.~~03684~~03586%
Weighted Average Coupon Current										5.~~60618~~60622%		6.~~06567~~06661%		6.~~03586~~03618%
Weighted Average Months to Maturity Original										356		352		352
Weighted Average Months to Maturity Prior										356		~~352~~351		~~352~~351
Weighted Average Months to Maturity Current										~~356~~354		~~351~~350		~~351~~350
Weighted Avg Remaining Amortization Term Original										356		352		352
Weighted Avg Remaining Amortization Term Prior										356		~~352~~351		~~352~~351
Weighted Avg Remaining Amortization Term Current										~~356~~354		~~351~~350		~~351~~350
Weighted Average Seasoning Original										1.37		5.83		5.54
Weighted Average Seasoning Prior										12.37		56.8377		56.5448
Weighted Average Seasoning Current										23.37		67.7764		67.4835
Page 10 of 30
Page 10 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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.~~39316~~39542%		3.~~33799~~33974%
Weighted Average Margin Current										2.54639%		3.~~39542~~39969%		3.~~33974~~34269%
Weighted Average Max Rate Original										11.60729%		12.00778%		11.98169%
Weighted Average Max Rate Prior										11.~~60729~~60736%		12.~~00778~~00266%		11.~~98169~~97674%
Weighted Average Max Rate Current										11.~~60736~~60739%		1211.~~00266~~99461%		11.~~97674~~96874%
Weighted Average Min Rate Original										5.60729%		3.52069%		3.65664%
Weighted Average Min Rate Prior										5.~~60729~~60736%		3.~~52069~~52392%		3.~~65664~~66055%
Weighted Average Min Rate Current										5.~~60736~~60739%		3.~~52392~~52969%		3.~~66055~~66849%
Weighted Average Cap Up Original										1.01865%		1.19649%		1.18491%
Weighted Average Cap Up Prior										1.01865%		1.~~19649~~19742%		1.~~18491~~18569%
Weighted Average Cap Up Current										1.~~01865~~01866%		1.~~19742~~19737%		1.~~18569~~18543%
Weighted Average Cap Down Original										1.01865%		1.19649%		1.18491%
Weighted Average Cap Down Prior										1.01865%		1.~~19649~~19742%		1.~~18491~~18569%
Weighted Average Cap Down Current										1.~~01865~~01866%		1.~~19742~~19737%		1.~~18569~~18543%
SERVICING FEES & ADVANCES
											Group 2		Group 1		Total
Current Servicing Fees										0.00		~~402~~381,~~580~~916.3881		~~402~~381,~~580~~916.3881
Delinquent Servicing Fees										16,~~835~~821.5762		~~198~~206,~~211~~578.3837		~~215~~223,~~046~~399.9599
TOTAL SERVICING FEES										16,~~835~~821.5762		~~600~~588,~~791~~495.7618		~~617~~605,~~627~~316.3380
Total Servicing Fees										16,~~835~~821.5762		~~600~~588,~~791~~495.7618		~~617~~605,~~627~~316.3380
Compensating Interest										-0.00		-79110,~~358~~714.3219		-79110,~~358~~714.3219
Delinquent Servicing Fees										-16,~~835~~821.5762		-~~198~~206,~~211~~578.3837		-~~215~~223,~~046~~399.9599
COLLECTED SERVICING FEES										0.00		~~323~~271,~~222~~202.0662		~~323~~271,~~222~~202.0662
Total Advaced Interest										~~562~~561,~~202~~740.4867		23,~~940~~039,~~528~~617.1960		3,~~502~~601,~~730~~358.6727
Total Advaced Principal										~~106~~125,~~043~~820.6057		~~416~~422,~~122~~767.2604		~~522~~548,~~165~~587.8661
Aggregate Advances with respect to this Distribution										~~668~~687,~~246~~561.0724		3,~~356~~462,~~650~~384.4564		4,~~024~~149,~~896~~945.5388
ADDITIONAL COLLATERAL INFORMATION
										Group 2		Group 1		Total
Prepayment Interest Shortfall (PPIS)										0.00		79110,~~358~~714.3219		79110,~~358~~714.3219
Compensating Interest										-0.00		-79110,~~358~~714.3219		-79110,~~358~~714.3219
Net Prepayment Interest Shortfall (PPIS)										0.00		0.00		0.00
Page 11 of 30
Page 11 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
Delinquency Report
	TOTAL
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				19,~~405~~855,~~185,333~~067.9079		832,~~469~~753,~~000~~170.8184		7809,~~906,325~~347.1625		113,~~496~~417,~~560,659~~585.8788
			% Balance				750.0054%		40.4515%		0.4204%		790.8774%
			# Loans				~~5,183~~46		~~348~~14		344		~~5,565~~64
			% # Loans				720.0266%		40.8420%		0.4706%		770.3291%
	FORECLOSURE		Balance		0174,953.0028		0.00		0.00		0.00		0174,953.0028
			% Balance		0.0001%		0.00%		0.00%		0.00%		0.0001%
			# Loans		01		0		0		0		01
			% # Loans		0.0001%		0.00%		0.00%		0.00%		0.0001%
	BANKRUPTCY		Balance		~~236~~2,~~628~~418,930.1837		126,~~820,897~~922.1564		~~392~~149,~~167~~616.1700		~~149,767~~0.8700		2,~~599~~595,~~460~~469.3701
			% Balance		0.0113%		0.1000%		0.0201%		0.0100%		0.14%
			# Loans		617		51		71		10		19
			% # Loans		0.0824%		0.0701%		0.1001%		0.0100%		0.2627%
	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		~~236~~2,~~628~~593,883.1865		19,~~407~~881,~~006,231~~990.0543		832,~~861~~902,~~167~~786.9884		8809,~~056,093~~347.0325		116,~~499~~188,~~160,120~~008.2417
			% Balance		0.0114%		750.0954%		40.4816%		0.4304%		800.0189%
			# Loans		618		~~5,188~~47		~~355~~15		354		~~5,584~~84
			% # Loans		0.0826%		720.0967%		40.9321%		0.4906%		771.5920%
Page 12 of 30
Page 12 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
	GROUP 1
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				19,~~288~~855,~~628,771~~067.5179		762,~~185~~753,~~423~~170.7984		7809,~~906,325~~347.1625		113,~~372~~417,~~720,520~~585.4688
			% Balance				730.6458%		40.3516%		0.4505%		780.4579%
			# Loans				~~5,084~~46		~~344~~14		344		~~5,462~~64
			% # Loans				710.67%		40.8520%		0.4806%		760.9993%
	FORECLOSURE		Balance		0174,953.0028		0.00		0.00		0.00		0174,953.0028
			% Balance		0.0001%		0.00%		0.00%		0.00%		0.0001%
			# Loans		01		0		0		0		01
			% # Loans		0.0001%		0.00%		0.00%		0.00%		0.0001%
	BANKRUPTCY		Balance		~~236~~2,~~628~~418,930.1837		126,~~820,897~~922.1564		~~392~~149,~~167~~616.1700		~~149,767~~0.8700		2,~~599~~595,~~460~~469.3701
			% Balance		0.0114%		0.1000%		0.0201%		0.0100%		0.15%
			# Loans		617		51		71		10		19
			% # Loans		0.0825%		0.0701%		0.1001%		0.0100%		0.2728%
	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		~~236~~2,~~628~~593,883.1865		19,~~290~~881,~~449,668~~990.6643		762,~~577~~902,~~590~~786.9684		8809,~~056,093~~347.0325		116,~~375~~188,~~319,980~~008.8317
			% Balance		0.0115%		730.7558%		40.3817%		0.4605%		780.6095%
			# Loans		618		~~5,089~~47		~~351~~15		354		~~5,481~~84
			% # Loans		0.0826%		710.7468%		40.9522%		0.4906%		771.2622%
Page 13 of 30
Page 13 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
	GROUP 2
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				~~116,556,562~~0.3900		~~7,283,577~~0.0200		0.00		~~123,840,139~~0.4100
			% Balance				940.1200%		50.8800%		0.00%		~~100~~0.00%
			# Loans				990		40		0		~~103~~0
			% # Loans				960.1200%		30.8800%		0.00%		~~100~~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		~~116,556,562~~0.3900		~~7,283,577~~0.0200		0.00		~~123,840,139~~0.4100
			% Balance		0.00%		940.1200%		50.8800%		0.00%		~~100~~0.00%
			# Loans		0		990		40		0		~~103~~0
			% # Loans		0.00%		960.1200%		30.8800%		0.00%		~~100~~0.00%
Page 14 of 30
Page 14 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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 30
Page 15 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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
TOTAL
3900011136 1
Page 16 of 30
			182,400.00		174,953.28		01-Jul-2005		5.750%		CA - 95.00%		360		01-Mar-2002
TOTAL			182,400.00		174,953.28
Page 16 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
Prepayment Report
VOLUNTARY PREPAYMENTS
											Group 2		Group 1		Total
Current
Number of Paid in Full Loans										0		~~142~~185		~~142~~185
Number of Repurchased Loans										0		02		02
Total Number of Loans Prepaid in Full										0		~~142~~187		~~142~~187
Curtailments Amount										-34,~~341~~975.7788		~~177~~473,~~939~~674.9638		~~174~~468,~~598~~698.1950
Paid in Full Balance										0.00		3550,~~579~~079,~~262~~942.1610		3550,~~579~~079,~~262~~942.1610
Repurchased Loans Balance										0.00		0924,994.0041		0924,994.0041
Total Prepayment Amount										-34,~~341~~975.7788		3551,~~757~~478,~~202~~610.1289		3551,~~753~~473,~~860~~635.3501
Cumulative
Number of Paid in Full Loans										0		~~198~~383		~~198~~383
Number of Repurchased Loans										0		02		02
Total Number of Loans Prepaid in Full										0		~~198~~385		~~198~~385
Paid in Full Balance										0.00		4797,~~827~~907,~~519~~461.4050		4797,~~827~~907,~~519~~461.4050
Repurchased Loans Balance										0.00		0924,994.0041		0924,994.0041
Curtailments Amount										-1015,~~548~~524.7563		1,~~285~~759,~~847~~521.3876		1,~~275~~743,~~298~~997.6313
Total Prepayment Amount										-1015,~~548~~524.7563		49100,~~113~~591,~~366~~977.7867		49100,~~102~~576,~~818~~453.0304
Page 17 of 30
Page 17 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
VOLUNTARY PREPAYMENTS RATES
											Group 2		Group 1		Total
SMM										0.00%		2.0094%		12.8775%
3 Months Avg SMM										0.00%		1.3790%		1.2878%
12 Months Avg SMM										0.00%		1.3790%		1.2878%
Avg SMM Since Cut-off										0.00%		1.3790%		1.2878%
CPR										-0.0305%		2130.5513%		2028.2943%
3 Months Avg CPR										-0.05%		1520.3056%		1419.3834%
12 Months Avg CPR										-0.05%		1520.3056%		1419.3834%
Avg CPR Since Cut-off										-0.05%		1520.3056%		1419.3834%
PSA										-67.8417%		1,~~592~~972.6543%		1,~~566~~934.9956%
3 Months Avg PSA Approximation										-1310.6960%		1,~~214~~524.9664%		1,~~196~~498.5751%
12 Months Avg PSA Approximation										-1310.6960%		1,~~214~~524.9664%		1,~~196~~498.5751%
Avg PSA Since Cut-off Approximation										-1310.6960%		1,~~214~~524.9664%		1,~~196~~498.5751%
Page 18 of 30
Page 18 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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 30
Page 19 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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
1103283931 1			320,925.00		320,925.00			19-May-2005		6.250%		VA - 76.25%		Paid Off - 360		01-May-2005
1103167182 1			171,000.00		170,093.63			17-Jun-2005		11.000%		HI - 15.00%		Paid Off - 360		01-May-2004
1103323652 1			64,400.00		64,273.51			17-May-2005		11.500%		CA - 19.82%		Paid Off - 180		01-Dec-2004
1103292726 1			51,000.00		50,888.80			16-Jun-2005		11.750%		FL - 30.00%		Paid Off - 180		01-Dec-2004
1103332194 1			55,000.00		54,811.56			18-May-2005		8.875%		CA - 20.00%		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
1103337584 1			20,000.00		19,970.28			24-May-2005		10.875%		CA - 20.00%		Paid Off - 180		01-Feb-2005
1103309243 1			68,196.00		68,072.60			16-Jun-2005		11.875%		CO - 30.00%		Paid Off - 180		01-Jan-2005
1103354388 1			544,000.00		544,000.00			27-May-2005		5.375%		CA - 80.00%		Paid Off - 360		01-May-2005
1103322914 1			100,800.00		100,547.70			02-Jun-2005		10.375%		CA - 20.00%		Paid Off - 180		01-Jan-2005
1103377328 1			250,000.00		249,578.74			31-May-2005		6.875%		NJ - 64.94%		Paid Off - 360		01-Apr-2005
1103329508 1			111,750.00		111,485.58			03-Jun-2005		11.375%		CA - 15.00%		Paid Off - 180		01-Dec-2004
1103378828 1			262,500.00		262,500.00			24-May-2005		5.875%		CA - 70.00%		Paid Off - 360		01-May-2005
1103332299 1			64,000.00		63,741.62			08-Jun-2005		8.875%		CA - 20.00%		Paid Off - 180		01-Nov-2004
1103380426 1			157,600.00		157,600.00			18-May-2005		6.875%		FL - 80.00%		Paid Off - 360		01-Mar-2005
1103334905 1			50,700.00		50,608.29			01-Jun-2005		11.875%		FL - 30.00%		Paid Off - 180		01-Jan-2005
1103385015 1			529,600.00		529,599.58			19-May-2005		4.625%		VA - 79.99%		Paid Off - 360		01-Feb-2005
1103337011 1			50,000.00		49,815.00			07-Jun-2005		8.500%		VA - 10.00%		Paid Off - 360		01-Jan-2005
1103385030 1			344,000.00		343,999.99			16-May-2005		5.375%		CA - 80.00%		Paid Off - 360		01-Mar-2005
1103366252 1			280,000.00		265,182.41			30-Jun-2005		5.875%		CA - 73.69%		Paid Off - 360		01-Apr-2005
1103388646 1			291,200.00		291,200.00			18-May-2005		5.990%		AL - 80.00%		Paid Off - 360		01-Mar-2005
1103366343 1			280,000.00		279,139.37			30-Jun-2005		5.875%		CA - 70.00%		Paid Off - 360		01-Apr-2005
1103388677 1			294,800.00		294,800.00			25-May-2005		6.140%		CA - 80.00%		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
1103388682 1			348,800.00		348,800.00			19-May-2005		6.940%		GA - 78.39%		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
1103389169 1			156,000.00		156,000.00			20-May-2005		6.640%		NV - 79.60%		Paid Off - 360		01-Mar-2005
1103377526 1			392,000.00		391,998.33			22-Jun-2005		5.000%		CA - 70.00%		Paid Off - 360		01-May-2005
1103390367 1			308,920.00		308,920.00			16-May-2005		6.625%		CA - 80.00%		Paid Off - 360		01-May-2005
1103384064 1			268,000.00		268,000.00			30-Jun-2005		6.000%		MD - 80.00%		Paid Off - 360		01-Apr-2005
1103390779 1			119,850.00		119,850.00			18-May-2005		6.750%		FL - 69.99%		Paid Off - 360		01-May-2005
1103384100 1			189,000.00		189,000.00			29-Jun-2005		6.250%		VA - 90.00%		Paid Off - 360		01-Apr-2005
1103393050 1			143,300.00		143,300.00			20-May-2005		7.250%		FL - 78.73%		Paid Off - 360		01-Apr-2005
1103384131 1			292,000.00		292,000.00			10-Jun-2005		6.075%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103393097 1			134,890.00		134,890.00			27-May-2005		7.125%		SC - 95.00%		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
1103393235 1			207,000.00		207,000.00			31-May-2005		7.990%		MN - 90.00%		Paid Off - 360		01-Apr-2005
1103385105 1			650,000.00		649,999.99			17-Jun-2005		5.875%		CA - 70.30%		Paid Off - 360		01-Mar-2005
1103394948 1			477,943.00		477,943.00			27-May-2005		6.000%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103385431 1			70,400.00		70,400.00			23-Jun-2005		5.500%		SC - 80.00%		Paid Off - 360		01-May-2005
1103395025 1			412,200.00		412,200.00			23-May-2005		6.500%		CA - 79.99%		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
1103395106 1			400,000.00		400,000.00			31-May-2005		6.375%		CA - 71.88%		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
1103395115 1			650,000.00		650,000.00			27-May-2005		6.375%		CA - 65.39%		Paid Off - 360		01-Apr-2005
1103386534 1			322,000.00		322,000.00			14-Jun-2005		5.875%		MA - 68.52%		Paid Off - 360		01-May-2005
1103395151 1			623,000.00		623,000.00			17-May-2005		6.875%		CO - 69.22%		Paid Off - 360		01-Apr-2005
1103386720 1			112,000.00		111,824.73			17-Jun-2005		7.250%		MN - 80.00%		Paid Off - 360		01-May-2005
1103395156 1			840,000.00		840,000.00			25-May-2005		6.500%		FL - 80.00%		Paid Off - 360		01-Mar-2005
1103387290 1			157,950.00		157,950.00			14-Jun-2005		7.625%		CA - 80.00%		Paid Off - 360		01-May-2005
1103395287 1			332,500.00		332,500.00			23-May-2005		5.250%		CA - 70.00%		Paid Off - 360		01-Feb-2005
1103387886 1			981,000.00		981,000.00			29-Jun-2005		5.000%		CA - 60.37%		Paid Off - 360		01-Dec-2004
1103395303 1			650,000.00		650,000.00			27-May-2005		7.375%		CA - 66.66%		Paid Off - 360		01-Apr-2005
1103388100 1			650,000.00		650,000.00			20-Jun-2005		8.375%		FL - 74.29%		Paid Off - 360		01-May-2005
1103395339 1			400,000.00		400,000.00			16-May-2005		7.750%		CA - 59.25%		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
1103395342 1			380,000.00		24,438.48			31-May-2005		6.500%		FL - 80.00%		Paid Off - 360		01-Apr-2005
1103389233 1			122,250.00		122,087.59			02-Jun-2005		5.390%		MA - 75.00%		Paid Off - 360		01-Mar-2005
1103397455 1			213,500.00		213,500.00			09-May-2005		6.250%		CA - 70.00%		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
1103399419 1			195,920.00		195,801.31			06-May-2005		8.500%		FL - 80.00%		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
1103399671 1			176,000.00		176,000.00			27-May-2005		5.250%		AZ - 79.27%		Paid Off - 360		01-May-2005
1103389487 1			437,600.00		437,600.00			10-Jun-2005		6.140%		CA - 88.59%		Paid Off - 360		01-Apr-2005
1103399777 1			336,000.00		336,000.00			20-May-2005		5.450%		CA - 80.00%		Paid Off - 360		01-Feb-2005
1103389490 1			338,000.00		336,704.62			13-Jun-2005		6.240%		VA - 62.95%		Paid Off - 360		01-Mar-2005
1103399838 1			287,200.00		286,442.18			20-May-2005		4.500%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103389586 1			248,000.00		247,999.00			29-Jun-2005		6.500%		NV - 80.00%		Paid Off - 360		01-May-2005
1103402414 1			294,989.00		294,222.74			04-May-2005		6.750%		NH - 90.00%		Paid Off - 360		01-Mar-2005
1103389731 1			206,150.00		205,451.26			27-Jun-2005		6.875%		NE - 95.00%		Paid Off - 360		01-Mar-2005
1103402430 1			291,117.00		290,414.43			10-May-2005		7.125%		CA - 90.00%		Paid Off - 360		01-Mar-2005
1103390384 1			295,800.00		295,800.00			17-Jun-2005		6.625%		CA - 68.00%		Paid Off - 360		01-May-2005
1103402460 1			360,550.00		44,722.13			18-May-2005		7.250%		MD - 47.92%		Paid Off - 360		01-Apr-2005
1103391098 1			374,550.00		374,550.00			17-Jun-2005		5.625%		CA - 70.00%		Paid Off - 360		01-May-2005
Page 20 of 30
Page 20 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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
1103402480 1			184,650.00		184,338.85			03-May-2005		6.875%		FL - 84.99%		Paid Off - 360		01-Apr-2005
1103391430 1			380,600.00		380,600.00			07-Jun-2005		6.500%		VA - 69.99%		Paid Off - 360		01-May-2005
1103402492 1			229,920.00		228,366.05			02-May-2005		6.950%		AZ - 80.00%		Paid Off - 360		01-Oct-2004
1103392713 1			200,050.00		200,050.00			21-Jun-2005		6.000%		FL - 70.00%		Paid Off - 360		01-May-2005
1103402501 1			380,000.00		379,127.20			03-May-2005		7.375%		FL - 95.00%		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
1103402535 1			47,250.00		46,996.39			05-May-2005		6.625%		MO - 90.00%		Paid Off - 360		01-Dec-2004
1103393066 1			166,392.00		166,392.00			16-Jun-2005		6.000%		FL - 80.00%		Paid Off - 360		01-Apr-2005
1103402587 1			117,300.00		117,125.35			16-May-2005		7.500%		FL - 60.00%		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
1103402601 1			637,500.00		634,078.32			12-May-2005		6.625%		FL - 85.00%		Paid Off - 360		01-Dec-2004
1103393169 1			311,752.00		311,752.00			28-Jun-2005		6.375%		VA - 80.00%		Paid Off - 360		01-Apr-2005
1103402650 1			441,000.00		439,854.50			16-May-2005		6.750%		WA - 90.00%		Paid Off - 360		01-Mar-2005
1103393883 1			280,000.00		280,000.00			01-Jun-2005		5.500%		CA - 70.00%		Paid Off - 360		01-May-2005
1103402652 1			370,500.00		368,605.41			04-May-2005		6.875%		ME - 95.00%		Paid Off - 360		01-Dec-2004
1103394669 1			400,000.00		398,855.45			21-Jun-2005		6.250%		CA - 37.38%		Paid Off - 360		01-Apr-2005
1103402672 1			108,000.00		107,486.74			02-May-2005		7.250%		CO - 80.00%		Paid Off - 360		01-Dec-2004
1103394944 1			408,244.00		408,244.00			23-Jun-2005		5.875%		CA - 80.00%		Paid Off - 360		01-Apr-2005
1103402688 1			25,650.00		25,528.11			25-May-2005		7.250%		AL - 88.45%		Paid Off - 360		01-Dec-2004
1103395036 1			368,000.00		368,000.00			01-Jun-2005		5.875%		CA - 80.00%		Paid Off - 360		01-Mar-2005
1103402748 1			298,189.00		297,588.03			10-May-2005		6.875%		FL - 95.00%		Paid Off - 360		01-Apr-2005
1103395043 1			520,000.00		520,000.00			27-Jun-2005		6.000%		CA - 79.81%		Paid Off - 360		01-Mar-2005
1103402758 1			290,700.00		289,272.76			19-May-2005		6.125%		MA - 90.00%		Paid Off - 360		01-Jan-2005
1103395139 1			364,760.00		363,612.02			23-Jun-2005		5.750%		CA - 79.11%		Paid Off - 360		01-Apr-2005
1103402780 1			370,800.00		368,857.30			03-May-2005		6.750%		MA - 90.00%		Paid Off - 360		01-Dec-2004
1103395169 1			387,700.00		387,700.00			21-Jun-2005		6.250%		NV - 79.99%		Paid Off - 360		01-Apr-2005
1103402809 1			500,000.00		498,603.31			19-May-2005		6.375%		CA - 86.06%		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
1103402861 1			471,000.00		469,746.43			27-May-2005		6.625%		DE - 79.84%		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
1103402892 1			452,105.00		450,901.19			26-May-2005		6.625%		NJ - 95.00%		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
1103402931 1			112,500.00		112,277.73			10-May-2005		8.125%		NV - 90.00%		Paid Off - 360		01-Mar-2005
1103396335 1			500,800.00		500,800.00			28-Jun-2005		7.000%		NV - 80.00%		Paid Off - 360		01-May-2005
1103402992 1			556,590.00		554,838.28			31-May-2005		5.750%		CA - 80.00%		Paid Off - 360		01-Mar-2005
1103399093 1			850,000.00		850,000.00			22-Jun-2005		5.990%		HI - 51.51%		Paid Off - 360		01-Apr-2005
1103403014 1			253,426.00		252,400.58			24-May-2005		7.125%		MD - 95.00%		Paid Off - 360		01-Jan-2005
1103399679 1			516,690.00		516,690.00			07-Jun-2005		6.250%		VA - 90.01%		Paid Off - 360		01-May-2005
1103403019 1			403,750.00		154,785.36			09-May-2005		6.875%		NY - 95.00%		Paid Off - 360		01-Feb-2005
1103399715 1			135,000.00		135,000.00			17-Jun-2005		7.125%		VA - 79.88%		Paid Off - 360		01-Apr-2005
1103403178 1			178,290.00		177,859.71			06-May-2005		7.125%		WA - 80.00%		Paid Off - 360		01-Mar-2005
1103399727 1			219,200.00		219,200.00			30-Jun-2005		6.125%		VA - 80.00%		Paid Off - 360		01-May-2005
1103403190 1			235,000.00		234,311.26			04-May-2005		6.125%		CA - 65.88%		Paid Off - 360		01-Mar-2005
1103399833 1			325,832.00		325,832.00			27-Jun-2005		6.000%		FL - 80.00%		Paid Off - 360		01-Apr-2005
1103403257 1			280,800.00		280,034.32			17-May-2005		6.500%		NY - 90.00%		Paid Off - 360		01-Mar-2005
1103400020 1			521,100.00		521,100.00			13-Jun-2005		6.875%		VA - 79.99%		Paid Off - 360		01-May-2005
1103403267 1			277,668.00		276,873.15			23-May-2005		6.250%		CA - 90.00%		Paid Off - 360		01-Mar-2005
1103400395 1			228,750.00		228,750.00			23-Jun-2005		5.750%		CA - 80.00%		Paid Off - 360		01-May-2005
1103403303 1			133,000.00		132,671.01			27-May-2005		7.000%		FL - 95.00%		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
1103403316 1			251,550.00		250,757.90			19-May-2005		7.250%		FL - 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
1103403403 1			127,000.00		126,810.89			16-May-2005		7.500%		FL - 89.99%		Paid Off - 360		01-Apr-2005
1103402454 1			190,000.00		189,089.12			03-Jun-2005		6.250%		CA - 48.74%		Paid Off - 360		01-Feb-2005
1103403466 1			172,000.00		171,444.88			05-May-2005		7.125%		FL - 89.96%		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
1103403511 1			252,231.00		251,665.89			05-May-2005		7.500%		FL - 90.00%		Paid Off - 360		01-Mar-2005
1103402568 1			400,000.00		397,170.37			22-Jun-2005		6.000%		DE - 63.23%		Paid Off - 360		01-Dec-2004
1103403542 1			65,455.00		65,328.90			27-May-2005		8.250%		NE - 95.00%		Paid Off - 360		01-Mar-2005
1103402586 1			117,300.00		117,023.80			01-Jun-2005		7.250%		FL - 60.00%		Paid Off - 360		01-Apr-2005
1103403549 1			184,700.00		184,196.36			26-May-2005		6.500%		NC - 68.41%		Paid Off - 360		01-Mar-2005
1103402657 1			145,422.00		144,730.94			29-Jun-2005		7.250%		AZ - 90.00%		Paid Off - 360		01-Jan-2005
1103403595 1			547,200.00		545,879.42			12-May-2005		7.125%		CA - 90.00%		Paid Off - 360		01-Mar-2005
1103402662 1			172,000.00		170,803.18			30-Jun-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Jan-2005
1103403600 1			162,000.00		161,706.29			13-May-2005		6.500%		WA - 90.00%		Paid Off - 360		01-Apr-2005
1103402719 1			198,000.00		196,836.97			28-Jun-2005		7.000%		FL - 90.00%		Paid Off - 360		01-Dec-2004
1103403643 1			220,500.00		220,005.99			11-May-2005		7.500%		CO - 90.00%		Paid Off - 360		01-Mar-2005
1103402741 1			414,800.00		412,267.37			23-Jun-2005		5.950%		CA - 89.20%		Paid Off - 360		01-Jan-2005
1103403645 1			218,500.00		217,932.43			23-May-2005		6.750%		MS - 95.00%		Paid Off - 360		01-Mar-2005
1103402811 1			144,000.00		143,298.71			03-Jun-2005		7.125%		NJ - 90.00%		Paid Off - 360		01-Jan-2005
1103403672 1			136,800.00		136,501.05			11-May-2005		7.625%		AZ - 90.00%		Paid Off - 360		01-Mar-2005
1103402853 1			369,150.00		366,896.10			29-Jun-2005		5.950%		CA - 80.78%		Paid Off - 360		01-Jan-2005
1103403683 1			405,600.00		404,439.43			16-May-2005		6.250%		CA - 80.00%		Paid Off - 360		01-Mar-2005
1103402887 1			189,050.00		188,483.49			30-Jun-2005		7.500%		TN - 94.52%		Paid Off - 360		01-Mar-2005
1103403708 1			109,250.00		108,943.20			17-May-2005		7.000%		NJ - 95.00%		Paid Off - 360		01-Mar-2005
1103402945 1			215,000.00		213,893.18			27-Jun-2005		5.875%		CA - 70.03%		Paid Off - 360		01-Feb-2005
Page 21 of 30
Page 21 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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
1103403713 1			175,348.00		174,881.29			18-May-2005		6.625%		FL - 89.76%		Paid Off - 360		01-Mar-2005
1103403031 1			252,000.00		250,772.73			14-Jun-2005		7.125%		DC - 90.00%		Paid Off - 360		01-Jan-2005
1103403750 1			415,372.00		414,344.57			17-May-2005		7.000%		MD - 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
1103403883 1			227,160.00		226,813.24			12-May-2005		7.375%		OR - 89.86%		Paid Off - 360		01-Apr-2005
1103403091 1			180,000.00		179,177.49			30-Jun-2005		6.500%		IL - 72.00%		Paid Off - 360		01-Feb-2005
1103403911 1			389,384.00		388,759.37			06-May-2005		7.125%		VA - 90.00%		Paid Off - 360		01-Apr-2005
1103403100 1			285,750.00		284,850.00			29-Jun-2005		7.250%		NV - 90.00%		Paid Off - 360		01-Mar-2005
1103403940 1			159,600.00		159,251.25			12-May-2005		7.625%		AZ - 95.00%		Paid Off - 360		01-Mar-2005
1103403159 1			367,500.00		366,025.58			21-Jun-2005		6.000%		FL - 75.00%		Paid Off - 360		01-Mar-2005
1103403975 1			193,000.00		192,517.92			27-May-2005		6.950%		MN - 82.87%		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
1103403993 1			115,200.00		114,915.06			02-May-2005		7.000%		TN - 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
1103404003 1			339,625.00		338,825.34			18-May-2005		7.250%		CA - 94.34%		Paid Off - 360		01-Mar-2005
1103403273 1			304,000.00		302,944.18			22-Jun-2005		6.750%		IL - 80.00%		Paid Off - 360		01-Mar-2005
1103404018 1			71,500.00		71,396.15			24-May-2005		7.625%		MD - 60.34%		Paid Off - 360		01-Apr-2005
1103403301 1			176,310.00		175,695.31			21-Jun-2005		7.875%		FL - 90.00%		Paid Off - 360		01-Feb-2005
1103404033 1			202,400.00		202,075.32			02-May-2005		7.125%		VA - 88.97%		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
1103404098 1			281,500.00		280,951.39			19-May-2005		6.125%		MD - 72.18%		Paid Off - 360		01-Apr-2005
1103403402 1			175,750.00		172,529.81			30-Jun-2005		6.950%		TN - 95.00%		Paid Off - 360		01-Mar-2005
1103404135 1			159,125.00		158,843.43			26-May-2005		6.625%		CO - 95.00%		Paid Off - 360		01-Apr-2005
1103403404 1			106,600.00		106,367.05			14-Jun-2005		7.625%		FL - 89.97%		Paid Off - 360		01-Apr-2005
1103404164 1			90,590.00		90,429.70			09-May-2005		6.625%		FL - 80.00%		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
1103404167 1			431,186.00		429,682.55			10-May-2005		6.250%		CA - 90.00%		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
1103404250 1			344,250.00		343,669.92			05-May-2005		6.875%		FL - 90.00%		Paid Off - 360		01-Apr-2005
1103403509 1			89,100.00		88,839.56			24-Jun-2005		7.625%		AZ - 90.00%		Paid Off - 360		01-Mar-2005
1103404293 1			121,500.00		121,206.78			24-May-2005		7.125%		GA - 90.00%		Paid Off - 360		01-Mar-2005
1103403544 1			361,000.00		359,834.90			17-Jun-2005		7.125%		MA - 95.00%		Paid Off - 360		01-Mar-2005
1103404358 1			500,000.00		499,093.51			11-May-2005		6.500%		MA - 79.49%		Paid Off - 360		01-Apr-2005
1103403588 1			256,025.00		255,178.13			28-Jun-2005		7.000%		VA - 95.00%		Paid Off - 360		01-Mar-2005
1103404361 1			330,500.00		329,943.09			05-May-2005		6.875%		IL - 64.17%		Paid Off - 360		01-Apr-2005
1103403592 1			33,250.00		33,145.28			01-Jun-2005		7.250%		LA - 95.00%		Paid Off - 360		01-Mar-2005
1103404381 1			177,300.00		177,055.16			26-May-2005		7.875%		AZ - 90.00%		Paid Off - 360		01-Apr-2005
1103403603 1			168,000.00		167,357.37			10-Jun-2005		6.250%		FL - 80.00%		Paid Off - 360		01-Mar-2005
1103404411 1			216,000.00		215,694.10			04-May-2005		7.750%		AZ - 90.00%		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
1103404454 1			229,500.00		229,112.58			31-May-2005		6.875%		AZ - 90.00%		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
1103404475 1			121,000.00		120,775.25			24-May-2005		6.375%		AZ - 51.49%		Paid Off - 360		01-Apr-2005
1103403745 1			256,500.00		255,896.06			06-Jun-2005		7.250%		VA - 95.00%		Paid Off - 360		01-Apr-2005
1103404493 1			183,500.00		183,233.52			31-May-2005		7.625%		FL - 89.99%		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
1103404494 1			96,600.00		96,445.02			31-May-2005		7.125%		IL - 70.00%		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
1103404522 1			90,800.00		90,661.38			11-May-2005		7.375%		FL - 89.97%		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
1103404523 1			288,000.00		287,419.55			10-May-2005		6.875%		WI - 90.00%		Paid Off - 360		01-Apr-2005
1103403847 1			#######		397,396.58			03-Jun-2005		7.500%		MD - 95.00%		Paid Off - 360		01-Mar-2005
1103404532 1			#######		396,291.78			25-May-2005		6.875%		IL - 95.00%		Paid Off - 360		01-May-2005
1103403857 1			421,000.00		419,465.22			10-Jun-2005		6.500%		CO - 73.86%		Paid Off - 360		01-Mar-2005
1103404577 1			271,412.00		270,961.34			27-May-2005		6.950%		CA - 90.00%		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
1103411216 1			105,020.00		105,020.00			31-May-2005		6.990%		AZ - 78.97%		Paid Off - 360		01-Apr-2005
1103403943 1			56,700.00		56,572.96			14-Jun-2005		7.500%		LA - 70.00%		Paid Off - 360		01-Apr-2005
2503088172 1			53,950.00		53,883.76			31-May-2005		11.750%		FL - 19.99%		Paid Off - 180		01-Feb-2005
1103404019 1			37,680.00		37,577.24			20-Jun-2005		6.500%		OH - 80.00%		Paid Off - 360		01-Apr-2005
2503088401 1			37,500.00		37,464.16			27-May-2005		12.875%		FL - 15.00%		Paid Off - 180		01-Feb-2005
1103404086 1			45,000.00		44,884.04			28-Jun-2005		8.250%		OH - 90.00%		Paid Off - 360		01-Mar-2005
2503089575 1			143,300.00		143,133.53			17-May-2005		12.000%		CA - 20.00%		Paid Off - 180		01-Feb-2005
1103404101 1			420,847.00		419,553.48			24-Jun-2005		5.875%		CA - 80.00%		Paid Off - 360		01-Apr-2005
2503090290 1			32,200.00		32,155.89			09-May-2005		11.250%		AZ - 17.94%		Paid Off - 180		01-Feb-2005
1103404106 1			201,000.00		200,467.02			02-Jun-2005		7.375%		RI - 60.00%		Paid Off - 360		01-Apr-2005
2503101627 1			129,600.00		129,600.00			18-May-2005		6.375%		AZ - 70.00%		Paid Off - 360		01-May-2005
1103404127 1			204,250.00		203,590.77			27-Jun-2005		7.125%		FL - 95.00%		Paid Off - 360		01-Mar-2005
2503101881 1			577,500.00		577,500.00			10-May-2005		5.250%		CA - 70.00%		Paid Off - 360		01-May-2005
1103404181 1			194,750.00		194,256.35			30-Jun-2005		6.875%		CA - 95.00%		Paid Off - 360		01-Apr-2005
2503102368 1			387,800.00		387,800.00			27-May-2005		5.750%		FL - 70.00%		Paid Off - 360		01-May-2005
1103404185 1			351,976.00		351,187.43			20-Jun-2005		7.500%		CA - 90.00%		Paid Off - 360		01-Apr-2005
3900010842 1			154,950.00		145,015.66			31-May-2005		6.000%		OR - 89.99%		Paid Off - 360		01-Nov-2001
1103404262 1			60,750.00		60,623.75			07-Jun-2005		7.875%		TN - 90.00%		Paid Off - 360		01-Apr-2005
3900010867 1			277,400.00		260,374.15			24-May-2005		5.000%		CA - 95.00%		Paid Off - 360		01-Jan-2002
1103404269 1			393,750.00		392,729.32			29-Jun-2005		7.500%		CA - 90.00%		Paid Off - 360		01-Apr-2005
Page 22 of 30
Page 22 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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
3900010911 1			123,500.00		117,202.08			19-May-2005		5.375%		NJ - 95.00%		Paid Off - 360		01-Feb-2002
1103404277 1			176,250.00		175,835.01			27-Jun-2005		7.250%		KS - 80.11%		Paid Off - 360		01-Apr-2005
3900010930 1			312,000.00		295,105.20			10-May-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Mar-2002
1103404302 1			632,000.00		630,008.94			03-Jun-2005		6.625%		IL - 80.00%		Paid Off - 360		01-Apr-2005
3900010936 1			221,350.00		210,860.41			10-May-2005		6.000%		CA - 95.00%		Paid Off - 360		01-Mar-2002
1103404315 1			215,000.00		214,339.15			23-Jun-2005		5.875%		NV - 64.56%		Paid Off - 360		01-Apr-2005
3900010937 1			442,000.00		422,405.61			27-May-2005		5.750%		CA - 80.00%		Paid Off - 360		01-Apr-2002
1103404319 1			385,300.00		384,436.77			02-Jun-2005		7.500%		VA - 89.99%		Paid Off - 360		01-Apr-2005
3900011016 1			70,650.00		67,973.62			25-May-2005		5.875%		AR - 90.00%		Paid Off - 360		01-Feb-2002
1103404328 1			386,950.00		386,060.04			27-Jun-2005		7.375%		VA - 90.00%		Paid Off - 360		01-Apr-2005
3900011032 1			130,000.00		118,791.32			31-May-2005		5.250%		NJ - 54.17%		Paid Off - 360		01-Mar-2002
1103404357 1			238,500.00		237,849.65			20-Jun-2005		6.500%		NJ - 90.00%		Paid Off - 360		01-Apr-2005
3900011034 1			321,100.00		274,459.75			26-May-2005		6.375%		FL - 95.00%		Paid Off - 360		01-Apr-2002
1103404383 1			210,000.00		209,363.64			15-Jun-2005		5.950%		CA - 48.28%		Paid Off - 360		01-Apr-2005
3900011079 1			133,700.00		124,479.88			13-May-2005		5.500%		CA - 70.00%		Paid Off - 360		01-Apr-2002
1103404445 1			500,000.00		498,763.26			23-Jun-2005		7.000%		FL - 89.61%		Paid Off - 360		01-Apr-2005
3900011101 1			107,900.00		103,440.18			27-May-2005		5.500%		CA - 89.92%		Paid Off - 360		01-Mar-2002
1103404458 1			116,000.00		115,646.95			01-Jun-2005		6.950%		IL - 82.86%		Paid Off - 360		01-Apr-2005
3900011145 1			315,000.00		298,123.61			18-May-2005		5.625%		CA - 84.68%		Paid Off - 360		01-Mar-2002
1103404548 1			475,000.00		473,654.44			07-Jun-2005		6.950%		CA - 82.61%		Paid Off - 360		01-Apr-2005
3900011209 1			154,800.00		145,066.28			10-May-2005		5.250%		CO - 90.00%		Paid Off - 360		01-Mar-2002
1103404596 1			82,350.00		82,174.49			13-Jun-2005		7.750%		TN - 90.00%		Paid Off - 360		01-Apr-2005
3900011224 1			207,300.00		200,222.13			31-May-2005		5.875%		OR - 75.39%		Paid Off - 360		01-Apr-2002
1103412167 1			395,500.00		395,500.00			09-Jun-2005		5.500%		HI - 70.00%		Paid Off - 360		01-May-2005
3900011234 1			196,000.00		186,836.42			27-May-2005		6.125%		CA - 80.00%		Paid Off - 360		01-Mar-2002
2500025390 1			41,800.00		41,446.06			15-Jun-2005		11.990%		CA - 20.00%		Paid Off - 180		01-May-2003
3900011319 1			190,000.00		181,247.78			24-May-2005		4.625%		CA - 80.00%		Paid Off - 360		01-Aug-2002
2503100816 1			227,500.00		227,500.00			10-Jun-2005		6.250%		FL - 70.00%		Paid Off - 360		01-Jun-2005
3900011367 1			157,500.00		151,704.92			12-May-2005		6.000%		CA - 70.00%		Paid Off - 360		01-Aug-2002
2503101838 1			539,000.00		537,545.26			08-Jun-2005		4.375%		WA - 70.00%		Paid Off - 360		01-May-2005
3900011425 1			113,050.00		109,031.81			17-May-2005		5.500%		CA - 85.00%		Paid Off - 360		01-Sep-2002
2503102091 1			348,000.00		347,608.38			20-Jun-2005		8.875%		CA - 74.92%		Paid Off - 360		01-May-2005
3900011430 1			225,000.00		217,429.08			16-May-2005		6.500%		CA - 79.51%		Paid Off - 360		01-Aug-2002
2503102331 1			550,000.00		549,095.71			28-Jun-2005		7.000%		NC - 67.08%		Paid Off - 360		01-May-2005
3900011438 1			150,000.00		131,726.48			10-May-2005		4.500%		CA - 7.50%		Paid Off - 360		01-Jul-2002
2503102582 1			195,450.00		195,450.00			10-Jun-2005		5.500%		FL - 70.00%		Paid Off - 360		01-May-2005
3900011478 1			148,000.00		147,877.28			09-May-2005		5.000%		CA - 80.00%		Paid Off - 360		01-Sep-2002
2503102911 1			330,000.00		330,000.00			23-Jun-2005		6.750%		CA - 70.97%		Paid Off - 360		01-Jun-2005
3900011491 1			300,300.00		284,681.34			09-May-2005		4.875%		CA - 70.00%		Paid Off - 360		01-Aug-2002
2503103012 1			296,800.00		296,800.00			21-Jun-2005		5.000%		CA - 70.00%		Paid Off - 360		01-Jun-2005
3900011608 1			236,500.00		226,813.65			23-May-2005		6.125%		IL - 94.98%		Paid Off - 360		01-Oct-2002
2503103705 1			206,750.00		206,750.00			27-Jun-2005		11.375%		FL - 89.99%		Paid Off - 360		01-Jun-2005
3900011684 1			394,400.00		391,003.86			11-May-2005		5.000%		CA - 80.00%		Paid Off - 360		01-Sep-2002
2503104319 1			125,900.00		125,900.00			07-Jun-2005		6.125%		FL - 69.99%		Paid Off - 360		01-Jun-2005
3900011693 1			157,700.00		153,214.10			10-May-2005		6.375%		NC - 87.62%		Paid Off - 360		01-Sep-2002
2503104477 1			465,600.00		464,906.76			22-Jun-2005		7.500%		CA - 80.00%		Paid Off - 360		01-May-2005
3900011695 1			104,900.00		101,483.51			26-May-2005		6.500%		NJ - 74.99%		Paid Off - 360		01-Sep-2002
2503106186 1			260,000.00		260,000.00			28-Jun-2005		6.625%		FL - 80.00%		Paid Off - 360		01-Jun-2005
3900011699 1			195,000.00		185,219.96			18-May-2005		5.250%		NJ - 73.59%		Paid Off - 360		01-Sep-2002
3900010698 1			37,900.00		25,798.31			21-Jun-2005		12.380%		FL - 37.90%		Paid Off - 180		01-May-1997
3900011715 1			365,500.00		354,572.71			09-May-2005		6.375%		WA - 85.00%		Paid Off - 360		01-Sep-2002
3900010840 1			150,000.00		140,354.45			28-Jun-2005		5.625%		IL - 68.81%		Paid Off - 360		01-Dec-2001
3900011716 1			200,000.00		189,791.54			31-May-2005		5.000%		CA - 80.00%		Paid Off - 360		01-Sep-2002
3900010851 1			308,000.00		293,172.84			28-Jun-2005		6.250%		CA - 80.00%		Paid Off - 360		01-Jan-2002
3900011738 1			250,500.00		239,621.96			27-May-2005		5.750%		CA - 59.65%		Paid Off - 360		01-Sep-2002
3900010852 1			571,000.00		534,564.17			01-Jun-2005		4.750%		NY - 43.93%		Paid Off - 360		01-Mar-2002
3900011754 1			360,000.00		344,336.08			24-May-2005		5.750%		CA - 80.00%		Paid Off - 360		01-Oct-2002
3900010883 1			252,000.00		237,682.02			16-Jun-2005		5.125%		CA - 80.00%		Paid Off - 360		01-Feb-2002
TOTAL			36,882,925.00		35,579,262.16
3900010896 1			550,000.00		519,644.16			28-Jun-2005		5.750%		MI - 75.35%		Paid Off - 360		01-Sep-2001
Page 23 of 30
3900010952 1			151,000.00		142,152.84			01-Jun-2005		5.250%		CA - 72.60%		Paid Off - 360		01-Mar-2002
3900010957 1			148,000.00		140,772.25			23-Jun-2005		5.375%		CA - 83.15%		Paid Off - 360		01-Feb-2002
3900010973 1			369,250.00		338,697.91			20-Jun-2005		6.000%		CA - 95.00%		Paid Off - 360		01-Feb-2002
3900010983 1			156,750.00		149,091.10			09-Jun-2005		5.625%		CA - 95.00%		Paid Off - 360		01-Feb-2002
3900010989 1			148,800.00		140,047.42			13-Jun-2005		5.125%		NY - 80.00%		Paid Off - 360		01-Feb-2002
3900010992 1			124,600.00		116,885.26			24-Jun-2005		5.000%		CA - 70.00%		Paid Off - 360		01-Feb-2002
3900010996 1			251,200.00		241,040.62			01-Jun-2005		5.500%		CA - 80.00%		Paid Off - 360		01-Feb-2002
3900011057 1			72,000.00		69,424.32			28-Jun-2005		5.500%		VA - 90.00%		Paid Off - 360		01-Mar-2002
Page 23 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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
3900011102 1			185,250.00		175,445.62			29-Jun-2005		5.500%		CA - 95.00%		Paid Off - 360		01-Apr-2002
3900011132 1			200,000.00		188,175.04			30-Jun-2005		5.125%		FL - 100.00%		Paid Off - 360		01-Feb-2002
3900011137 1			102,000.00		95,900.68			30-Jun-2005		6.250%		MI - 80.00%		Paid Off - 360		01-Jan-2002
3900011141 1			299,250.00		286,651.12			22-Jun-2005		5.375%		CA - 75.00%		Paid Off - 360		01-Feb-2002
3900011152 1			203,200.00		193,953.69			01-Jun-2005		5.500%		CA - 80.00%		Paid Off - 360		01-Mar-2002
3900011159 1			316,000.00		298,536.48			07-Jun-2005		5.250%		CA - 80.00%		Paid Off - 360		01-Mar-2002
3900011161 1			184,800.00		173,085.25			30-Jun-2005		5.125%		CA - 80.00%		Paid Off - 360		01-Feb-2002
3900011203 1			294,400.00		284,165.02			10-Jun-2005		6.500%		MD - 80.00%		Paid Off - 360		01-Feb-2002
3900011229 1			188,800.00		177,046.92			03-Jun-2005		5.750%		CA - 80.00%		Paid Off - 360		01-Mar-2002
3900011231 1			132,450.00		126,092.60			10-Jun-2005		5.500%		CA - 79.99%		Paid Off - 360		01-Mar-2002
3900011260 1			320,000.00		306,900.78			22-Jun-2005		5.750%		FL - 80.00%		Paid Off - 360		01-Apr-2002
3900011321 1			150,000.00		143,589.86			08-Jun-2005		6.000%		CA - 12.15%		Paid Off - 360		01-Jul-2002
3900011327 1			290,400.00		275,954.65			21-Jun-2005		4.875%		CA - 80.00%		Paid Off - 360		01-Aug-2002
3900011350 1			161,910.00		156,914.04			23-Jun-2005		6.000%		LA - 90.00%		Paid Off - 360		01-Aug-2002
3900011382 1			183,350.00		167,487.51			23-Jun-2005		5.125%		CA - 95.00%		Paid Off - 360		01-Aug-2002
3900011394 1			288,025.60		273,551.69			02-Jun-2005		5.125%		CA - 80.00%		Paid Off - 360		01-Aug-2002
3900011417 1			127,800.00		124,409.37			13-Jun-2005		6.250%		MI - 90.00%		Paid Off - 360		01-Apr-2002
3900011442 1			434,500.00		414,373.24			22-Jun-2005		5.375%		CA - 68.11%		Paid Off - 360		01-Aug-2002
3900011549 1			151,350.00		144,865.52			08-Jun-2005		5.250%		WA - 80.00%		Paid Off - 360		01-Sep-2002
3900011557 1			336,000.00		336,000.00			20-Jun-2005		5.000%		CA - 80.00%		Paid Off - 360		01-Sep-2002
3900011570 1			385,000.00		365,733.49			08-Jun-2005		5.750%		VA - 74.04%		Paid Off - 360		01-Sep-2002
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
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 24 of 30
Page 25 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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 25 of 30
Page 26 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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 26 of 30
Page 27 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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 27 of 30
Page 28 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 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.~~090000~~314380%
Next LIBOR														3.~~314380~~460000%
Page 28 of 30
Page 29 of 31
Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
Additional Certificate Report
ADDITIONAL CERTIFICATE REPORT
													Next Pass Through Rate		NET WAC Shortfall Paid
CLASS
			1-A-1A										3.5873%		$0.00
			1-A-1B										3.5863%		$0.00
			1-A-2										3.6580%		$0.00
			1-A-IO										0.00%		$0.00
			2-A-1										34.9106%		$0.00
			2-A-2										4.0722%		$0.00
			1-M-1										3.7489%		$0.00
			1-M-2										3.7792%		$0.00
			1-M-3										3.7994%		$0.00
			1-M-4										34.9611%		~~#######~~$0.00
			1-M-5										34.9914%		~~#######~~$0.00
			1-M-6										4.0621%		~~#######~~$0.00
			2-M-1										4.0621%		$0.00
			2-M-2										4.4459%		$0.00
			1-B-1										4.6176%		~~#######~~$105.71
			1-B-2										5.0621%		#######
			2-B-1										5.7994%		$0.00
			2-B-2										7.6681%		$0.00
			CERT										0.00%		$0.00
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Impac CMB Trust 2005-4
Collateralized Asset-Backed Notes
2005-4
June 27, 2005 Distribution
July 25, 2005 Distribution
Other Related Information
ADDITIONAL INFORMATION
										Group 2		Group 1		Total
Reference Risk ID 934099L - Lehman														~~582~~441,~~661~~304.1391
Reference Risk ID 934131L - Lehman														~~184~~140,~~781~~330.4361
Reference Risk ID 937613L - Lehman														0.00
Reference Risk ID 934123L - Lehman														~~374~~293,~~465~~929.3379
Reference Risk ID 934095L - Lehman														5542,~~961~~452.4431
Reference Risk ID 934115L - Lehman														1813,~~383~~086.9046
Reference Risk ID 934145L - Lehman														0.00
Reference Risk ID CXIMP054B1 - Bear														033,305.0038
Total Derivatives Outflow/(Inflow) Net Amount														1964,~~216,253~~409.2350
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Filing Compare · IMH ASSETS CORP., COLLATERALIZED ASSET-BACKED BONDS, SERIES 2005-4