

                           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):  December 27, 2004
                          (Date of earliest event reported)

                   Impac CMB Trust Series 2004-8 (as Issuer under the
                    Indenture dated as September 29, 2004, providing
                   for the issuance Trust Certificates, Series 2004-8)
                  (Exact name of Registrant as specified in its Charter)


                                       California
                    (State or Other Jurisdiction of Incorporation)

               333-117817-01                          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
     December 27, 2004.

                                    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 Trustee under the
                                  Indenture Agreement on behalf of Impac
                                  Assets Corporation Inc., Registrant


          Date:  Dec 28, 2004               By:  /s/  Katherine M. Wannenmacher
                                            Katherine M. Wannenmacher
                                            Vice President


                                   EXHIBIT INDEX

          DOCUMENT

          99.1 Monthly Remittance Statement to the Certificateholders
          dated as of December 27, 2004.



IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution

				External Parties					Table of Contents

												Page
				Seller								Page
				Seller					1. Certificate Payment Report					2
				IMPAC Mortgage Holdings Inc.					1. Certificate Payment Report					2
				IMPAC Mortgage Holdings Inc.					2. Collection Account Report					4
									2. Collection Account Report					4
									3. Credit Enhancement Report					6
									4. Collateral Report					7
				Certificate Insurer(s)					5. Delinquency Report					10
				Certificate Insurer(s)					5. Delinquency Report					10
									6. REO Report					14

									7. Foreclosure Report					15
									8. Prepayment Report					16
									9. Prepayment Detail Report					19
									9. Prepayment Detail Report					19
									10. Realized Loss Report					21
									11. Realized Loss Detail Report					24
				Servicer(s)					11. Realized Loss Detail Report					24
				Servicer(s)					12. Triggers and Adj. Cert. Report					25
				Impac Funding Corp.					12. Triggers and Adj. Cert. Report					25
				Impac Funding Corp.					13. Additional Certificate Report					26
									13. Additional Certificate Report					26
									14. Other Related Information					27


				Underwriter(s)
				Countrywide Securities


									Total Number of Pages					27
									Total Number of Pages

				Dates					Contacts

				Cut-Off Date:		September 01, 2004			Marion Hogan
				Close Date:		September 29, 2004			Administrator
				First Distribution Date:		October 25, 2004			(714) 247-6282
									marion.c.hogan@db.com
									marion.c.hogan@db.com
									Address:
									1761 East St. Andrew Place, Santa Ana, CA 92705
				Distribution Date:		December 27, 2004
									Factor Information:			(800) 735-7777
				Record Date:		December 24, 2004			Factor Information:			(800) 735-7777
									Main Phone Number:			(714) 247-6000
									Main Phone Number:			(714) 247-6000

									https://www.tss.db.com/invr






Page 1 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Certificate Payment Report
Current Period Distribution -
					Prior											Current
	Class		Original		Principal					Total		Realized		Deferred		Principal
	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	SNR	$	635,985,000.00		626,216,354.87	1,370,014.05		7,788,891.23		9,158,905.28		0.00		0.00		618,427,463.64
1-A	SNR	$	635,985,000.00		626,216,354.87	1,370,014.05		7,788,891.23		9,158,905.28		0.00		0.00		618,427,463.64
2-A-1	SNR	$	745,195,000.00		736,646,507.00	1,605,265.90		7,730,056.21		9,335,322.11		0.00		0.00		728,916,450.79
2-A-2	SNR	$	121,312,000.00		119,920,371.24	264,422.85		1,258,393.55		1,522,816.40		0.00		0.00		118,661,977.69
3-A	SNR	$	62,659,000.00		62,373,586.50	139,144.26		701,815.70		840,959.96		0.00		0.00		61,671,770.80
3-M-1	MEZ	$	6,316,000.00		6,287,230.44	14,891.92		70,742.72		85,634.64		0.00		0.00		6,216,487.72
3-M-2	MEZ	$	9,601,000.00		9,557,267.18	26,587.66		107,536.55		134,124.21		0.00		0.00		9,449,730.63
3-B	SUB	$	19,202,000.00		19,114,534.35	61,304.57		215,073.09		276,377.66		0.00		0.00		18,899,461.26
CERT	R	$	0.00		0.00	0.00		0.00		0.00		0.00		0.00		0.00




Total			1,600,270,000.00		1,580,115,851.58	3,481,631.21		17,872,509.05		21,354,140.26		0.00		0.00		1,562,243,342.53
Total




Interest Accrual Detail Current Period Factor Information per $1,000 of Original Face-
								Orig. Principal		Prior							Current
								Orig. Principal		Prior							Current
	Period		Period					(with Notional)		Principal						Total	Principal
	Period		Period
Class	Starting		Ending		Method	Cusip		Balance		Balance		Interest		Principal		Distribution	Balance

								(1)		(1)		(2)		(3)		(4)=(2)+(3)	(5)
1-A	11/26/04		12/26/04		A-Act/360	45254NKQ9		635,985,000.00		984.640133		2.154161		12.246973		14.401134	972.393160
2-A-1	11/26/04		12/26/04		A-Act/360	45254NKR7		745,195,000.00		988.528515		2.154155		10.373199		12.527355	978.155316
2-A-2	11/26/04		12/26/04		A-Act/360	45254NKS5		121,312,000.00		988.528515		2.179692		10.373199		12.552892	978.155316
3-A	11/26/04		12/26/04		A-Act/360	45254NKT3		62,659,000.00		995.444972		2.220659		11.200557		13.421216	984.244415
3-M-1	11/26/04		12/26/04		A-Act/360	45254NKU0		6,316,000.00		995.444972		2.357809		11.200557		13.558366	984.244414
3-M-2	11/26/04		12/26/04		A-Act/360	45254NKV8		9,601,000.00		995.444972		2.769259		11.200557		13.969817	984.244415
3-B	11/26/04		12/26/04		A-Act/360	45254NKW6		19,202,000.00		995.444972		3.192614		11.200557		14.393171	984.244415
CERT	11/25/04		12/24/04		IM0408101	0.00		0.000000		0.000000		0.000000		0.000000		0.000000






Page 2 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 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	635,985,000.00		3,671,328.30		17,519,078.67	38,457.69		17,557,536.36		21,228,864.66		0.00		0.00		618,427,463.64
2-A-1	745,195,000.00		4,290,606.39		16,136,831.26	141,717.95		16,278,549.21		20,569,155.60		0.00		0.00		728,916,450.79
2-A-2	121,312,000.00		707,427.80		2,626,951.71	23,070.59		2,650,022.31		3,357,450.11		0.00		0.00		118,661,977.69
3-A	62,659,000.00		371,120.65		980,922.29	6,306.91		987,229.20		1,358,349.85		0.00		0.00		61,671,770.80
3-M-1	6,316,000.00		39,901.00		98,876.55	635.73		99,512.28		139,413.28		0.00		0.00		6,216,487.72
3-M-2	9,601,000.00		72,019.05		150,302.99	966.38		151,269.37		223,288.42		0.00		0.00		9,449,730.63
3-B	19,202,000.00		171,307.65		300,605.97	1,932.77		302,538.74		473,846.39		0.00		0.00		18,899,461.26
CERT	0.00		0.00		0.00	0.00		0.00		0.00		0.00		0.00		0.00




Total	1,600,270,000.00		9,323,710.84		37,813,569.44	213,088.02		38,026,657.47		47,350,368.31		0.00		0.00		1,562,243,342.53


Interest Detail -
	Pass		Prior Principal			Non-		Prior		Unscheduled				Paid or		Current
	Pass		Prior Principal			Non-		Prior		Unscheduled				Paid or

	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	2.54063%		626,216,354.87		1,370,014.05	0.00		0.00		0.00		1,370,014.05		1,370,014.05		0.00
2-A-1	2.53063%		736,646,507.00		1,605,265.90	0.00		0.00		0.00		1,605,265.90		1,605,265.90		0.00
2-A-2	2.56063%		119,920,371.24		264,422.85	0.00		0.00		0.00		264,422.85		264,422.85		0.00
3-A	2.59063%		62,373,586.50		139,144.26	0.00		0.00		0.00		139,144.26		139,144.26		0.00
3-M-1	2.75063%		6,287,230.44		14,891.92	0.00		0.00		0.00		14,891.92		14,891.92		0.00
3-M-2	3.23063%		9,557,267.18		26,587.66	0.00		0.00		0.00		26,587.66		26,587.66		0.00
3-B	3.72452%		19,114,534.35		61,304.57	0.00		0.00		0.00		61,304.57		61,304.57		0.00
CERT	0.00000%		0.00		0.00	0.00		0.00		0.00		0.00		0.00		0.00




Total			1,580,115,851.58		3,481,631.21	0.00		0.00		0.00		3,481,631.21		3,481,631.21		0.00



Page 3 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Collection Account Report
SUMMARY
SUMMARY
							Group 3		Group 2		Group 1		Total
Principal Collections							1,024,929.08		8,055,067.94		6,862,566.23		15,942,563.25
Principal Withrawals							0.00		0.00		0.00		0.00
Principal Other Accounts							0.00		0.00		0.00		0.00
TOTAL NET PRINCIPAL							1,024,929.08		8,055,067.94		6,862,566.23		15,942,563.25
Interest Collections							424,920.92		3,605,464.17		2,846,131.67		6,876,516.77
Interest Withdrawals							-0.00		-92,794.75		-67,840.11		-160,634.85
Interest Other Accounts							0.00		0.00		0.00		0.00
Interest Fees							-361.21		-155,539.24		-76,892.66		-232,793.11
TOTAL NET INTEREST							424,559.72		3,357,130.18		2,701,398.90		6,483,088.80
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION							1,449,488.80		11,412,198.12		9,563,965.13		22,425,652.05



PRINCIPAL - COLLECTIONS
PRINCIPAL - COLLECTIONS
								Group 3		Group 2		Group 1		Total
Scheduled Principal Received								118,026.21		132,975.72		67,570.55		318,572.48
Curtailments								0.00		64,890.05		80,208.17		145,098.22
Prepayments In Full								906,902.87		7,386,570.02		6,714,787.51		15,008,260.40
Repurchased/Substitutions								0.00		470,632.15		0.00		470,632.15
Liquidations								0.00		0.00		0.00		0.00
Insurance Principal								0.00		0.00		0.00		0.00
Other Additional Principal								0.00		0.00		0.00		0.00
Delinquent Principal								-118,026.21		-104,624.48		-55,734.45		-278,385.14
Realized Losses								-0.00		-0.00		-0.00		-0.00
Principal Recoveries
Advanced Principal								118,026.21		104,624.48		55,734.45		278,385.14
TOTAL PRINCIPAL COLLECTED								1,024,929.08		8,055,067.94		6,862,566.23		15,942,563.25


PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK



PRINCIPAL - OTHER ACCOUNTS
PRINCIPAL - OTHER ACCOUNTS
							Group 3		Group 2		Group 1		Total
TOTAL PRINCIPAL OTHER ACCOUNTS							0.00		0.00		0.00		0.00





Page 4 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution

INTEREST - COLLECTIONS
INTEREST - COLLECTIONS
							Group 3		Group 2		Group 1		Total
Scheduled Interest							439,730.79		4,057,369.75		3,028,516.74		7,525,617.28
Repurchased/Substitution Interest							0.00		2,080.15		0.00		2,080.15
Liquidation Interest							0.00		0.00		0.00		0.00
Insurance Interest							0.00		0.00		0.00		0.00
Other Additional Interest							0.00		0.00		0.00		0.00
Prepayment Interest Shortfalls							-2,397.05		-23,923.40		-16,815.32		-43,135.77
Delinquent Interest							-435,101.80		-3,361,638.12		-2,551,445.43		-6,348,185.35
Compensating Interest							2,397.05		23,923.40		16,815.32		43,135.77
Civil Relief Act Shortfalls							-0.00		-0.00		-0.00		-0.00
Interest Advanced							420,291.94		2,907,652.40		2,369,060.35		5,697,004.70
TOTAL INTEREST COLLECTED							424,920.92		3,605,464.17		2,846,131.67		6,876,516.77


INTEREST - WITHDRAWALS
INTEREST - WITHDRAWALS
							Group 3		Group 2		Group 1		Total
Trust Fund Expenses							0.00		0.00		0.00		0.00
Non-Recoverable Advances							0.00		0.00		0.00		0.00
Reimbursements to Master Servicer							0.00		0.00		0.00		0.00
Class 1-A,2-A-1,2-A-2 Bond Insurance									92,794.75		67,840.11		160,634.85

TOTAL INTEREST WITHDRAWALS							0.00		92,794.75		67,840.11		160,634.85


INTEREST - OTHER ACCOUNTS
INTEREST - OTHER ACCOUNTS
							Group 3		Group 2		Group 1		Total
Prepayment Charges							0.00		0.00		0.00		0.00

Deriviative Contract Payments							-112,392.32		-554,059.61		-405,059.86		-1,071,511.79
Interest Coverage Amount
TOTAL INTEREST OTHER ACCOUNTS							0.00		0.00		0.00		0.00



INTEREST - FEES
INTEREST - FEES
							Group 3		Group 2		Group 1		Total
Master Servicing Fee							134.52		21,153.75		15,479.19		36,767.46
Sub Servicing Fee							0.00		74,857.97		19,558.26		94,416.23
Indenture Trustee Fee							83.96		705.12		515.97		1,305.06
OwnerTrustee Fee							142.73		1,198.71		877.15		2,218.59
Primary Mortgage Insurance							0.00		57,623.69		40,462.08		98,085.77

TOTAL INTEREST FEES							361.21		155,539.24		76,892.66		232,793.11



Page 5 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Credit Enhancement Report
ACCOUNTS


SPACE INTENTIONALLY LEFT BLANK





INSURANCE

SPACE INTENTIONALLY LEFT BLANK



STRUCTURAL FEATURES
STRUCTURAL FEATURES
							Group 3		Group 2		Group 1		Total
Overcollateralized Amount							3,416,066.06		0.00		0.00		3,416,066.06
Overcollateralization Release Amount							0.00		0.00		0.00		0.00
Overcollateralization Deficiency Amount							1,987,401.73		2,987,954.35		2,193,419.91		7,168,775.99
Overcollateralization Target Amount							5,403,467.79		2,987,954.35		2,193,419.91		10,584,842.05



Page 6 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Collateral Report


COLLATERAL



								Group 3		Group 2		Group 1		Total



*Loan Count:*


Original							104		4,135		1,568		5,807
Prior							104		4,100		1,550		5,754
Prefunding							0		0		0		0
Scheduled Paid Offs							-0		-0		-0		-0
Full Voluntary Prepayments							-1		-38		-20		-59
Repurchases							-0		-2		-0		-2
Liquidations							-0		-0		-0		-0
Current							103		4,060		1,530		5,693
*Principal Balance:*


Original							100,999,397.97		853,701,241.62		626,691,402.37		1,581,392,041.96
Prior							100,748,684.53		846,149,905.29		619,167,727.42		1,566,066,317.24
Prefunding							0.00		0.00		0.00		0.00
Scheduled Principal							-118,026.21		-132,975.72		-67,570.55		-318,572.48
Partial Prepayments							-0.00		-64,890.05		-80,208.17		-145,098.22
Full Voluntary Prepayments							-906,902.87		-7,386,570.02		-6,714,787.51		-15,008,260.40
Repurchases							-0.00		-470,632.15		-0.00		-470,632.15
Liquidations							-0.00		-0.00		-0.00		-0.00
Current							99,723,755.45		838,094,837.35		612,305,161.19		1,550,123,753.99





PREFUNDING

SPACE INTENTIONALLY LEFT BLANK






Page 7 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution

CHARACTERISTICS
CHARACTERISTICS
							Group 3		Group 2		Group 1		Total
Weighted Average Coupon Original							5.23749%		5.76510%		5.87714%		5.77580%
Weighted Average Coupon Prior							5.23752%		5.76384%		5.87650%		5.77484%
Weighted Average Coupon Current							5.23756%		5.75706%		5.86952%		5.76811%
Weighted Average Months to Maturity Original							356		358		354		356
Weighted Average Months to Maturity Prior							355		357		353		355
Weighted Average Months to Maturity Current							354		356		352		354
Weighted Avg Remaining Amortization Term Original							356		358		354		356
Weighted Avg Remaining Amortization Term Prior							355		357		353		355
Weighted Avg Remaining Amortization Term Current							354		356		352		354
Weighted Average Seasoning Original							3.54		1.65		1.54		1.72
Weighted Average Seasoning Prior							4.54		2.65		2.53		2.72
Weighted Average Seasoning Current							5.54		3.65		3.53		3.72









Page 8 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution

ARM CHARACTERISTICS
ARM CHARACTERISTICS
							Group 3		Group 2		Group 1		Total
Weighted Average Margin Original							2.87080%		4.06924%		3.92720%		3.93604%
Weighted Average Margin Prior							2.87081%		4.06953%		3.92735%		3.93621%
Weighted Average Margin Current							2.87077%		4.06947%		3.92565%		3.93514%
Weighted Average Max Rate Original							10.23749%		11.74789%		11.67509%		11.62115%
Weighted Average Max Rate Prior							10.23752%		11.74662%		11.67463%		11.62021%
Weighted Average Max Rate Current							10.23756%		11.73993%		11.66558%		11.61247%
Weighted Average Min Rate Original							5.23749%		4.18292%		4.04157%		4.19699%
Weighted Average Min Rate Prior							5.23752%		4.18329%		4.04196%		4.19741%
Weighted Average Min Rate Current							5.23756%		4.18233%		4.03960%		4.19655%
Weighted Average Cap Up Original							1.00000%		1.03415%		1.07742%		1.04867%
Weighted Average Cap Up Prior							1.00000%		1.03421%		1.07697%		1.04853%
Weighted Average Cap Up Current							1.00000%		1.03444%		1.07773%		1.04890%
Weighted Average Cap Down Original							1.00000%		1.03415%		1.07742%		1.04867%
Weighted Average Cap Down Prior							1.00000%		1.03421%		1.07697%		1.04853%
Weighted Average Cap Down Current							1.00000%		1.03444%		1.07773%		1.04890%




SERVICING FEES & ADVANCES

								Group 3		Group 2		Group 1		Total




Current Servicing Fees							277.25		97,210.43		35,914.61		133,402.29
Delinquent Servicing Fees							14,809.86		453,985.72		182,385.07		651,180.66
TOTAL SERVICING FEES							14,944.39		549,997.44		217,422.51		782,364.34


Total Servicing Fees							14,944.39		549,997.44		217,422.51		782,364.34
Compensating Interest							-2,397.05		-23,923.40		-16,815.32		-43,135.77
Delinquent Servicing Fees							-14,809.86		-453,985.72		-182,385.07		-651,180.66
COLLECTED SERVICING FEES							930.78		17,045.73		2,512.53		88,047.91


Total Advaced Interest							420,291.94		2,907,652.40		2,369,060.35		5,697,004.70
Total Advaced Principal							118,026.21		104,624.48		55,734.45		278,385.14
Aggregate Advances with respect to this Distribution							33,001.01		2,243,442.53		181,352.28		2,457,795.81





ADDITIONAL COLLATERAL INFORMATION
							Group 3		Group 2		Group 1		Total
Prepayment Interest Shortfall (PPIS)							2,397.05		23,923.40		16,815.32		43,135.77
Compensating Interest							-2,397.05		-23,923.40		-16,815.32		-43,135.77
Net Prepayment Interest Shortfall (PPIS)							0.00		0.00		0.00		0.00






Page 9 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Delinquency Report

	TOTAL
					< 1 PAYMENT	1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance			6,030,880.97		753,200.00		0.00		6,784,080.97
			% Balance			0.39%		0.05%		0.00%		0.44%
			# Loans			26		4		0		30
			% # Loans			0.46%		0.07%		0.00%		0.53%
	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	6,030,880.97		753,200.00		0.00		6,784,080.97
			% Balance		0.00%	0.39%		0.05%		0.00%		0.44%
			# Loans		0	26		4		0		30
			% # Loans		0.00%	0.46%		0.07%		0.00%		0.53%









Page 10 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution


	GROUP 1
					< 1 PAYMENT	1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance			3,011,937.49		0.00		0.00		3,011,937.49
			% Balance			0.49%		0.00%		0.00%		0.49%
			# Loans			9		0		0		9
			% # Loans			0.59%		0.00%		0.00%		0.59%
	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	3,011,937.49		0.00		0.00		3,011,937.49
			% Balance		0.00%	0.49%		0.00%		0.00%		0.49%
			# Loans		0	9		0		0		9
			% # Loans		0.00%	0.59%		0.00%		0.00%		0.59%










Page 11 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution

	GROUP 2
					< 1 PAYMENT	1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance			3,018,943.48		753,200.00		0.00		3,772,143.48
			% Balance			0.36%		0.09%		0.00%		0.45%
			# Loans			17		4		0		21
			% # Loans			0.42%		0.10%		0.00%		0.52%
	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	3,018,943.48		753,200.00		0.00		3,772,143.48
			% Balance		0.00%	0.36%		0.09%		0.00%		0.45%
			# Loans		0	17		4		0		21
			% # Loans		0.00%	0.42%		0.10%		0.00%		0.52%










Page 12 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution

	GROUP 3
					< 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 13 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 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
SPACE INTENTIONALLY LEFT BLANK
SPACE INTENTIONALLY LEFT BLANK



TOTAL



Page 14 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 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



Page 15 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Prepayment Report

VOLUNTARY PREPAYMENTS
VOLUNTARY PREPAYMENTS

								Group 3		Group 2		Group 1		Total




*Current*


Number of Paid in Full Loans							1		38		20		59
Number of Repurchased Loans							0		2		0		2
Total Number of Loans Prepaid in Full							1		40		20		61
Curtailments Amount							0.00		64,890.05		80,208.17		145,098.22
Paid in Full Balance							906,902.87		7,386,570.02		6,714,787.51		15,008,260.40
Repurchased Loans Balance							0.00		470,632.15		0.00		470,632.15
Total Prepayment Amount							906,902.87		7,922,092.22		6,794,995.68		15,623,990.77

*Cumulative*


Number of Paid in Full Loans							1		73		38		112
Number of Repurchased Loans							0		2		0		2
Total Number of Loans Prepaid in Full							1		75		38		114
Paid in Full Balance							906,902.87		14,631,691.22		13,741,222.27		29,279,816.36
Repurchased Loans Balance							0.00		470,632.15		0.00		470,632.15
Curtailments Amount							29,203.31		100,112.03		441,772.68		571,088.02
Total Prepayment Amount							936,106.18		15,202,435.40		14,182,994.95		30,321,536.53










Page 16 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution

VOLUNTARY PREPAYMENTS RATES
VOLUNTARY PREPAYMENTS RATES

								Group 3		Group 2		Group 1		Total



SMM							0.90%		0.94%		1.10%		1.00%
3 Months Avg SMM							0.31%		0.60%		0.76%		0.64%
12 Months Avg SMM							0.31%		0.60%		0.76%		0.64%
Avg SMM Since Cut-off							0.31%		0.60%		0.76%		0.64%


CPR							10.29%		10.68%		12.40%		11.34%
3 Months Avg CPR							3.67%		6.94%		8.75%		7.46%
12 Months Avg CPR							3.67%		6.94%		8.75%		7.46%
Avg CPR Since Cut-off							3.67%		6.94%		8.75%		7.46%


PSA							928.35%		1,463.84%		1,756.88%		1,522.92%
3 Months Avg PSA Approximation							403.89%		1,310.12%		1,728.27%		1,368.69%
12 Months Avg PSA Approximation							403.89%		1,310.12%		1,728.27%		1,368.69%
Avg PSA Since Cut-off Approximation							403.88%		1,310.12%		1,728.27%		1,368.69%










Page 17 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 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/(0.002*min(30,WAS))
	PSA Standard Prepayment Model: CPR/(0.002*min(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)
	Average CPR over period between the nth month and mth month (AvgCPRn,m): 1-((1-AvgSMMn,m)^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)

	Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments, liquidations, and repurchases.
	Dates correspond to distribution dates.




Page 18 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Prepayment Detail Report
Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original						Current		State &		Type Prepayment		First
Loan Number			Original						Current		State &		Type Prepayment

&		Loan	Principal		Prepayment		Prepayment		Note		LTV at		&		Payment

Loan Group		Status	Balance		Amount		Date		Rate		Origination		Original Term		Date

1103156337 2			49,000.00		48,259.31		03-Nov-2004		9.750%		NV - 20.00%		Paid Off - 180		06/01/2004
1103156337 2			49,000.00		48,259.31		03-Nov-2004		9.750%		NV - 20.00%		Paid Off - 180		06/01/2004
1103169818 2			52,000.00		51,866.58		22-Nov-2004		11.000%		VA - 20.00%		Paid Off - 360		05/01/2004
1103183929 2			182,000.00		182,000.00		23-Nov-2004		5.125%		HI - 70.00%		Paid Off - 360		08/01/2004
1103205021 2			229,600.00		229,600.00		01-Nov-2004		6.125%		CA - 80.00%		Paid Off - 360		09/01/2004
1103210148 2			262,800.00		262,323.57		11-Nov-2004		6.500%		MD - 90.00%		Paid Off - 360		10/01/2004
1103211141 2			120,000.00		119,717.47		23-Nov-2004		7.250%		NV - 80.00%		Paid Off - 360		09/01/2004
1103218027 1			578,200.00		578,200.00		16-Nov-2004		4.875%		CA - 70.00%		Paid Off - 360		08/01/2004
1103218430 1			411,550.00		411,550.00		30-Nov-2004		6.125%		OR - 80.00%		Paid Off - 360		09/01/2004
1103225070 2			182,400.00		182,400.00		01-Nov-2004		8.750%		CA - 95.00%		Paid Off - 360		09/01/2004
1103226390 1			248,000.00		247,701.76		09-Nov-2004		10.500%		FL - 24.97%		Paid Off - 180		09/01/2004
1103226957 1			354,400.00		354,400.00		24-Nov-2004		6.375%		CA - 80.00%		Paid Off - 360		10/01/2004
1103230007 2			212,000.00		212,000.00		01-Nov-2004		5.250%		CA - 80.00%		Paid Off - 360		10/01/2004
1103230534 2			222,510.00		222,055.17		02-Nov-2004		5.875%		CA - 80.00%		Paid Off - 360		10/01/2004
1103231076 2			306,000.00		306,000.00		02-Nov-2004		7.990%		IL - 90.00%		Paid Off - 360		08/01/2004
1103233012 2			235,000.00		235,000.00		05-Nov-2004		8.625%		NV - 95.00%		Paid Off - 360		09/01/2004
1103233055 1			340,000.00		339,993.58		30-Nov-2004		5.500%		CA - 80.00%		Paid Off - 360		09/01/2004
1103234535 2			207,750.00		207,750.00		15-Nov-2004		5.875%		CA - 80.00%		Paid Off - 360		09/01/2004
1103234944 2			275,000.00		274,620.26		02-Nov-2004		7.875%		MA - 88.71%		Paid Off - 360		10/01/2004
1103235807 2			136,500.00		136,500.00		16-Nov-2004		5.875%		NV - 70.00%		Paid Off - 360		09/01/2004
1103235965 2			133,650.00		133,650.00		17-Nov-2004		7.625%		CO - 90.00%		Paid Off - 360		10/01/2004
1103236043 1			564,000.00		564,000.00		23-Nov-2004		6.000%		CA - 80.00%		Paid Off - 360		10/01/2004
1103236948 1			452,641.00		452,641.00		10-Nov-2004		7.625%		CA - 95.00%		Paid Off - 360		09/01/2004
1103239993 2			240,000.00		240,000.00		26-Nov-2004		5.875%		VA - 80.00%		Paid Off - 360		09/01/2004
1103240566 1			460,000.00		460,000.00		19-Nov-2004		5.575%		CA - 80.00%		Paid Off - 360		09/01/2004
1103240776 2			192,000.00		191,513.32		10-Nov-2004		6.875%		VA - 80.00%		Paid Off - 360		09/01/2004
1103241562 2			192,500.00		192,500.00		04-Nov-2004		4.500%		SC - 70.00%		Paid Off - 360		09/01/2004
1103241565 1			346,500.00		346,500.00		10-Nov-2004		4.990%		CA - 70.00%		Paid Off - 360		09/01/2004
1103241645 1			49,500.00		49,404.77		10-Nov-2004		8.500%		CA - 9.90%		Paid Off - 360		09/01/2004
1103241693 1			70,850.00		70,773.34		24-Nov-2004		10.990%		FL - 19.99%		Paid Off - 360		09/01/2004
1103241991 2			333,700.00		333,001.05		22-Nov-2004		5.750%		CA - 79.46%		Paid Off - 360		10/01/2004
1103243045 2			301,624.00		301,624.00		01-Nov-2004		6.375%		CA - 75.41%		Paid Off - 360		09/01/2004
1103243162 2			196,000.00		196,000.00		19-Nov-2004		5.000%		NV - 70.00%		Paid Off - 360		09/01/2004
1103244712 1			208,000.00		208,000.00		29-Nov-2004		5.875%		AZ - 80.00%		Paid Off - 360		09/01/2004
1103246082 1			364,000.00		364,000.00		09-Nov-2004		6.500%		CA - 80.00%		Paid Off - 360		10/01/2004
1103247394 2			305,900.00		305,466.79		12-Nov-2004		7.750%		AZ - 95.00%		Paid Off - 360		10/01/2004
1103248563 2			190,000.00		189,481.91		01-Nov-2004		6.500%		MA - 95.00%		Paid Off - 360		09/01/2004
1103248590 2			94,905.00		94,905.00		30-Nov-2004		7.875%		FL - 95.00%		Paid Off - 360		09/01/2004
1103248590 2			94,905.00		94,905.00				7.875%		FL - 95.00%		Paid Off - 360



Page 19 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution

Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original						Current		State &		Type Prepayment		First
Loan Number			Original						Current		State &		Type Prepayment

&		Loan	Principal		Prepayment		Prepayment		Note		LTV at		&		Payment

Loan Group		Status	Balance		Amount		Date		Rate		Origination		Original Term		Date

1103249763 2			171,000.00		170,732.41		02-Nov-2004		7.250%		MD - 90.00%		Paid Off - 360		10/01/2004
1103249763 2			171,000.00		170,732.41		02-Nov-2004		7.250%		MD - 90.00%		Paid Off - 360		10/01/2004
1103250035 1			414,400.00		413,447.26		05-Nov-2004		5.250%		IL - 80.00%		Paid Off - 360		10/01/2004
1103250219 2			247,500.00		247,500.00		17-Nov-2004		6.625%		CA - 90.00%		Paid Off - 360		10/01/2004
1103250834 1			466,200.00		466,200.00		16-Nov-2004		5.875%		VA - 84.53%		Paid Off - 360		09/01/2004
1103251827 2			78,500.00		78,273.18		22-Nov-2004		8.800%		WI - 100.00%		Paid Off - 360		07/01/2004
1103253357 2			176,800.00		176,800.00		23-Nov-2004		5.850%		MN - 80.00%		Paid Off - 360		09/01/2004
1103253612 2			208,410.00		208,410.00		10-Nov-2004		5.850%		AZ - 80.00%		Paid Off - 360		06/01/2004
1103257031 2			196,000.00		196,000.00		18-Nov-2004		4.625%		FL - 70.00%		Paid Off - 360		10/01/2004
1103257839 2			333,000.00		333,000.00		10-Nov-2004		5.250%		CA - 35.80%		Paid Off - 360		10/01/2004
1103260239 1			365,058.00		365,058.00		03-Nov-2004		8.500%		NV - 90.00%		Paid Off - 360		10/01/2004
1103267227 2			326,250.00		326,250.00		17-Nov-2004		5.500%		CA - 75.00%		Paid Off - 360		10/01/2004
1103267991 2			98,000.00		98,000.00		04-Nov-2004		7.790%		MI - 79.67%		Paid Off - 360		09/01/2004
1103268827 1			512,000.00		512,000.00		18-Nov-2004		6.500%		CA - 80.00%		Paid Off - 360		10/01/2004
1103269389 2			285,420.00		285,420.00		10-Nov-2004		6.990%		CA - 80.00%		Paid Off - 360		09/01/2004
1103277262 2			98,900.00		98,900.00		04-Nov-2004		4.500%		GA - 79.83%		Paid Off - 360		10/01/2004
2503056792 1			40,000.00		39,888.28		24-Nov-2004		9.875%		CA - 8.61%		Paid Off - 180		06/01/2004
2503075989 1			400,000.00		399,629.52		10-Nov-2004		6.375%		FL - 47.06%		Paid Off - 360		11/01/2004
2503077886 2			88,550.00		88,550.00		24-Nov-2004		5.250%		FL - 70.00%		Paid Off - 360		11/01/2004
2503078437 2			100,000.00		100,000.00		03-Nov-2004		7.000%		NV - 80.00%		Paid Off - 360		10/01/2004
2503078467 2			130,500.00		130,500.00		10-Nov-2004		6.875%		FL - 90.00%		Paid Off - 360		10/01/2004
2503081880 1			71,400.00		71,400.00		01-Nov-2004		4.375%		FL - 70.00%		Paid Off - 360		11/01/2004
5500000836 3			910,000.00		906,902.87		15-Nov-2004		6.125%		CA - 70.00%		Paid Off - 360		08/01/2004
1103229974 2			196,000.00		195,482.83			4.500%		CA - 70.00%		Repur/Subs - 360		10/01/2004
1103230365 2			276,000.00		275,149.32			5.875%		CA - 83.64%		Repur/Subs - 360		09/01/2004


TOTAL			15,490,368.00		15,478,892.55
TOTAL


Page 20 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Realized Loss Report

COLLATERAL REALIZED LOSSES



								Group 3		Group 2		Group 1		Total


*Current*
*Current*



Number of Loans Liquidated							0		0		0		0
Collateral Principal Realized Loss/(Gain) Amount							0.00		0.00		0.00		0.00
Collateral Interest Realized Loss/(Gain) Amount							0.00		0.00		0.00		0.00
Net Liquidation Proceeds							0.00		0.00		0.00		0.00

*Cumulative*
*Cumulative*



Number of Loans Liquidated							0		0		0		0
Collateral Realized Loss/(Gain) Amount							0.00		0.00		0.00		0.00
Net Liquidation Proceeds							0.00		0.00		0.00		0.00










Page 21 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution


DEFAULT SPEEDS



								Group 3		Group 2		Group 1		Total



MDR							0.00%		0.00%		0.00%		0.00%
3 Months Avg MDR							0.00%		0.00%		0.00%		0.00%
12 Months Avg MDR							0.00%		0.00%		0.00%		0.00%
Avg MDR Since Cut-off							0.00%		0.00%		0.00%		0.00%


CDR							0.00%		0.00%		0.00%		0.00%
3 Months Avg CDR							0.00%		0.00%		0.00%		0.00%
12 Months Avg CDR							0.00%		0.00%		0.00%		0.00%
Avg CDR Since Cut-off							0.00%		0.00%		0.00%		0.00%


SDA							0.00%		0.00%		0.00%		0.00%
3 Months Avg SDA Approximation							0.00%		0.00%		0.00%		0.00%
12 Months Avg SDA Approximation							0.00%		0.00%		0.00%		0.00%
Avg SDA Since Cut-off Approximation							0.00%		0.00%		0.00%		0.00%


Loss Severity Approximation for Current Period							0.00%		0.00%		0.00%		0.00%
3 Months Avg Loss Severity Approximation							0.00%		0.00%		0.00%		0.00%
12 Months Avg Loss Severity Approximation							0.00%		0.00%		0.00%		0.00%
Avg Loss Severity Approximation Since Cut-off							0.00%		0.00%		0.00%		0.00%












Page 22 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 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 23 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Realized Loss Detail Report
Loan Number			Current		State &			Prior		Realized				Cumulative
														Cumulative
&		Loan	Note		LTV at	Original		Principal		Loss/(Gain)		Realized		Realized

Loan Group		Status	Rate		Origination	Term		Balance		Revision		Loss/(Gain)		Loss/(Gain)
Loan Group		Status	Rate		Origination	Term		Balance		Revision		Loss/(Gain)		Loss/(Gain)




TOTAL



Page 24 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Triggers and Adj. Cert. Report
TRIGGER EVENTS
TRIGGER EVENTS
							Group 3		Group 2		Group 1		Total
Has Step_up Condition Occurred (0=No,1=Yes)													0



ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK



ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
							Group 3		Group 2		Group 1		Total
Current LIBOR													2.180630%
Next LIBOR													2.180630%




Page 25 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Additional Certificate Report

ADDITIONAL CERTIFICATE REPORT

CLASS



Page 26 of 27
IMPAC CMB Trust 2004-8

Collateralized Asset-Backed Bonds
Collateralized Asset-Backed Bonds
2004-8

December 27, 2004 Distribution
Other Related Information
ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
							Group 3		Group 2		Group 1		Total
Reference Risk ID 776593D Effort ID N508859 Global ID													110,444.18
Reference Risk ID 776569D Effort ID N508854 Global ID													205,293.40
Reference Risk ID 777933D Effort ID N509934 Global ID													469,664.19
Reference Risk ID 777927D Effort ID N509932 Global ID													284,161.88
Reference Risk ID 776597D Effort ID N508910 Global ID													0.00
Reference Risk ID 776571D Effort ID N508847 Global ID													1,948.14
Total Derivatives Outflow/(Inflow) Net Amount													1,071,511.79




Page 27 of 27

IMPAC CMB TRUST SERIES 2004-8 8-K