
                                       UNITED STATES
                           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):  August 25, 2005
                          (Date of earliest event reported)

            Indymac MBS Inc (as Depositor under the Pooling and Servicing
                Agreement, dated as February 1, 2005, providing for the
                issuance of IndyMAc INDX Mortgage Loan Trust 2005-AR3
                Mortgage Pass-Through Certificates, Series 2005-AR3)
                 (Exact name of registrant as specified in charter)


                                     DELAWARE
                     (State or Other Jurisdiction of Incorporation)

               333-119384-13                         95-4791925
          (Commission File Number)        (I.R.S. Employer Identification No.)


          155 NORTH LAKE AVENUE
          PASADENA, CALIFORNIA                         91101
          (Address of principal executive offices)     (Zip Code)



          Registrant's Telephone Number, Including Area Code:  (800) 669-2300

       (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
     August 25, 2005.

                                    Signatures

               Pursuant to the requirements of the Securities Exchange Act of
          1934, the Registrant has duly caused this report to be signed on its
          behalf by the undersigned, hereunto duly authorized.


                                  Deutsche Bank National Trust Company,
                                  in its capacity as Trustee under the
                                  Pooling and Servicing Agreement on
                                  behalf of Indymac MBS Inc, Registrant


          Date:  Aug 26, 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 August 25, 2005.



IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

				External Parties						Table of Contents

													Page
				Seller									Page
				Seller						1. Certificate Payment Report					2
				IndyMac Bank						1. Certificate Payment Report					2
				IndyMac Bank						2. Collection Account Report					4
										2. Collection Account Report					4
										3. Credit Enhancement Report					9
										4. Collateral Report					10
				Certificate Insurer(s)						5. Delinquency Report					17
				Certificate Insurer(s)						5. Delinquency Report					17
										6. REO Report					23

										7. Foreclosure Report					24
										8. Prepayment Report					25
										9. Prepayment Detail Report					30
										9. Prepayment Detail Report					30
										10. Realized Loss Report					32
										11. Realized Loss Detail Report					37
				Servicer(s)						11. Realized Loss Detail Report					37
				Servicer(s)						12. Triggers and Adj. Cert. Report					38
				IndyMac Bank						12. Triggers and Adj. Cert. Report					38
				IndyMac Bank						13. Other Related Information					40
										13. Other Related Information					40


				Underwriter(s)
				Bear Stearns & Co.


										Total Number of Pages					41
										Total Number of Pages

				Dates						Contacts

				Cut-Off Date:			February 01, 2005			Brent Hoyler
				Close Date:			January 28, 2005			Administrator
				First Distribution Date:			March 25, 2005			(714) 247-6322
										Brent.Hoyler@db.com
										Brent.Hoyler@db.com
										Address:
										1761 East St. Andrew Place, Santa Ana, CA 92705
				Distribution Date:			August 25, 2005
										Factor Information:			(800) 735-7777
				Record Date:			July 29, 2005			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 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 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-1	SR	$	133,402,800.00		114,984,224.58		515,989.57		3,578,779.87		4,094,769.44		0.00		0.00		111,405,444.71
1-A-1	SR	$	133,402,800.00		114,984,224.58		515,989.57		3,578,779.87		4,094,769.44		0.00		0.00		111,405,444.71
2-A-1	SR	$	109,545,500.00		91,777,259.47		415,430.58		5,834,397.32		6,249,827.90		0.00		0.00		85,942,862.15
3-A-1	SR	$	184,486,000.00		169,438,677.17		754,335.31		4,868,185.49		5,622,520.80		0.00		0.00		164,570,491.68
3-A-2	SR	$	17,696,000.00		16,252,652.41		72,356.26		466,959.07		539,315.33		0.00		0.00		15,785,693.34
3-X	NTL	$	0.00		0.00		23,056.67		0.00		23,056.67		0.00		0.00		0.00
4-A-1	SR	$	45,428,700.00		42,684,551.65		196,776.89		1,548,659.88		1,745,436.77		0.00		0.00		41,135,891.77
4-A-2	SR	$	1,542,000.00		1,448,854.55		6,679.26		52,566.63		59,245.89		0.00		0.00		1,396,287.92
5-A-1	SR	$	33,310,700.00		31,470,002.10		148,540.72		648,183.96		796,724.68		0.00		0.00		30,821,818.14
5-A-2	SR	$	1,130,000.00		1,067,557.95		5,038.95		21,988.37		27,027.32		0.00		0.00		1,045,569.58
A-R	SR/RES	$	100.00		0.00		0.00		0.00		0.00		0.00		0.00		0.00
B-1	SUB	$	24,771,600.00		24,760,362.50		112,802.72		2,294.96		115,097.68		0.00		0.00		24,758,067.54
B-2	SUB	$	8,065,200.00		8,061,541.26		36,726.59		747.20		37,473.79		0.00		0.00		8,060,794.06
B-3	SUB	$	5,184,800.00		5,182,447.94		23,610.08		480.35		24,090.43		0.00		0.00		5,181,967.59
B-4	SUB	$	4,896,700.00		4,894,478.64		22,298.16		453.65		22,751.81		0.00		0.00		4,894,024.99
B-5	SUB	$	4,032,600.00		4,030,770.63		18,363.30		373.60		18,736.90		0.00		0.00		4,030,397.03
B-6	SUB	$	2,592,748.00		2,591,571.59		11,806.63		240.21		12,046.84		0.00		0.00		2,591,331.38
P	P	$	100.00		100.00		16,248.00		0.00		16,248.00		0.00		0.00		100.00

Total			576,085,548.00		518,645,052.44		2,380,059.69		17,024,310.56		19,404,370.25		0.00		0.00		501,620,741.88
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-1	07/01/05		07/30/05		A-30/360		45660LFH7		133,402,800.00		861.932617		3.867907		26.826872		30.694779	835.105745
2-A-1	07/01/05		07/30/05		A-30/360		45660LFJ3		109,545,500.00		837.800361		3.792311		53.260036		57.052347	784.540325
3-A-1	07/01/05		07/30/05		A-30/360		45660LFK0		184,486,000.00		918.436506		4.088849		26.387832		30.476680	892.048674
3-A-2	07/01/05		07/30/05		A-30/360		45660LFL8		17,696,000.00		918.436506		4.088848		26.387832		30.476680	892.048674
3-X	07/01/05		07/30/05		A-30/360		45660LFM6		202,182,000.00		918.436506		0.114039		0.000000		0.114039	892.048674
4-A-1	07/01/05		07/30/05		A-30/360		45660LFN4		45,428,700.00		939.594390		4.331555		34.089901		38.421455	905.504489
4-A-2	07/01/05		07/30/05		A-30/360		45660LFP9		1,542,000.00		939.594390		4.331556		34.089903		38.421459	905.504488
5-A-1	07/01/05		07/30/05		A-30/360		45660LFQ7		33,310,700.00		944.741543		4.459249		19.458731		23.917981	925.282811
5-A-2	07/01/05		07/30/05		A-30/360		45660LFR5		1,130,000.00		944.741549		4.459248		19.458735		23.917982	925.282814
A-R	07/01/05		07/30/05		A-30/360		45660LFS3		100.00		0.000000		0.000000		0.000000		0.000000	0.000000
B-1	07/01/05		07/30/05		A-30/360		45660LFT1		24,771,600.00		999.546356		4.553712		0.092645		4.646356	999.453711
B-2	07/01/05		07/30/05		A-30/360		45660LFU8		8,065,200.00		999.546355		4.553711		0.092645		4.646356	999.453710
B-3	07/01/05		07/30/05		A-30/360		45660LFV6		5,184,800.00		999.546355		4.553711		0.092646		4.646357	999.453709
B-4	07/01/05		07/30/05		A-30/360		45660LFX2		4,896,700.00		999.546356		4.553712		0.092644		4.646356	999.453712
B-5	07/01/05		07/30/05		A-30/360		45660LFY0		4,032,600.00		999.546355		4.553712		0.092645		4.646357	999.453710
B-6	07/01/05		07/30/05		A-30/360		45660LFZ7		2,592,748.00		999.546269		4.553713		0.092647		4.646360	999.453622
P	07/01/05		07/30/05		45660LFW4		100.00		1,000.000000		162,480.000000		0.000000		162,480.000000		1,000.000000



Page 2 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

Distribution to Date -
																	Current


	Original				Unscheduled		Scheduled		Total		Total		Realized		Deferred		Principal

Class	Face Value		Interest		Principal		Principal		Principal		Distribution		Loss		Interest		Balance
	(1)		(2)		(3)		(4)		(5)=(3)+(4)		(6)=(2)+(5)		(7)		(8)		(9)=(1)-(5)-(7)+(8)
1-A-1	133,402,800.00		3,389,577.06		21,956,058.49		41,296.80		21,997,355.29		25,386,932.35		0.00		0.00		111,405,444.71
2-A-1	109,545,500.00		2,743,893.76		23,502,422.62		100,215.23		23,602,637.85		26,346,531.61		0.00		0.00		85,942,862.15
3-A-1	184,486,000.00		4,750,415.57		19,796,308.88		119,199.44		19,915,508.32		24,665,923.89		0.00		0.00		164,570,491.68
3-A-2	17,696,000.00		455,662.51		1,898,872.98		18,016,635.34		1,910,306.66		2,365,969.17		0.00		0.00		15,785,693.34
3-X	0.00		145,190.58		0.00		0.00		0.00		145,190.58		0.00		0.00		0.00
4-A-1	45,428,700.00		1,227,503.37		4,209,562.39		83,245.84		4,292,808.23		5,520,311.60		0.00		0.00		41,135,891.77
4-A-2	1,542,000.00		41,665.53		0.00		83,713.38		145,712.08		187,377.61		0.00		0.00		1,396,287.92
5-A-1	33,310,700.00		925,338.76		2,445,888.71		42,993.15		2,488,881.86		3,414,220.62		0.00		0.00		30,821,818.14
5-A-2	1,130,000.00		31,390.30		82,971.96		1,458.46		84,430.42		115,820.72		0.00		0.00		1,045,569.58
A-R	100.00		0.00		0.00		0.00		100.00		100.00		0.00		0.00		0.00
B-1	24,771,600.00		677,744.45		0.00		13,532.46		13,532.46		691,276.91		0.00		0.00		24,758,067.54
B-2	8,065,200.00		220,661.74		0.00		4,405.94		4,405.94		225,067.68		0.00		0.00		8,060,794.06
B-3	5,184,800.00		141,854.77		0.00		2,832.41		2,832.41		144,687.18		0.00		0.00		5,181,967.59
B-4	4,896,700.00		133,972.42		0.00		2,675.01		2,675.01		136,647.43		0.00		0.00		4,894,024.99
B-5	4,032,600.00		110,330.88		0.00		2,202.97		2,202.97		112,533.85		0.00		0.00		4,030,397.03
B-6	2,592,748.00		70,936.90		0.00		1,416.62		1,416.62		72,353.52		0.00		0.00		2,591,331.38
P	100.00		34,929.39		0.00		0.00		0.00		34,929.39		0.00		0.00		100.00

Total	576,085,548.00		15,101,067.99		73,892,086.03		18,515,823.05		74,464,806.12		89,565,874.11		0.00		0.00		501,620,741.88


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-1	5.38498%		114,984,224.58		515,989.57		0.00		0.00		0.00		515,989.57		515,989.57		0.00
2-A-1	5.43181%		91,777,259.47		415,430.58		0.00		0.00		0.00		415,430.58		415,430.58		0.00
3-A-1	5.34236%		169,438,677.17		754,335.31		0.00		0.00		0.00		754,335.31		754,335.31		0.00
3-A-2	5.34236%		16,252,652.41		72,356.26		0.00		0.00		0.00		72,356.26		72,356.26		0.00
3-X	0.14900%		185,691,329.58		23,056.67		0.00		0.00		0.00		23,056.67		23,056.67		0.00
4-A-1	5.53203%		42,684,551.65		196,776.89		0.00		0.00		0.00		196,776.89		196,776.89		0.00
4-A-2	5.53203%		1,448,854.55		6,679.26		0.00		0.00		0.00		6,679.26		6,679.26		0.00
5-A-1	5.66409%		31,470,002.10		148,540.72		0.00		0.00		0.00		148,540.72		148,540.72		0.00
5-A-2	5.66409%		1,067,557.95		5,038.95		0.00		0.00		0.00		5,038.95		5,038.95		0.00
A-R	0.00000%		0.00		0.00		0.00		0.00		0.00		0.45		0.00		0.45
B-1	5.46693%		24,760,362.50		112,802.72		0.00		0.00		0.00		112,802.72		112,802.72		0.00
B-2	5.46693%		8,061,541.26		36,726.59		0.00		0.00		0.00		36,726.59		36,726.59		0.00
B-3	5.46693%		5,182,447.94		23,610.08		0.00		0.00		0.00		23,610.08		23,610.08		0.00
B-4	5.46693%		4,894,478.64		22,298.16		0.00		0.00		0.00		22,298.16		22,298.16		0.00
B-5	5.46693%		4,030,770.63		18,363.30		0.00		0.00		0.00		18,363.30		18,363.30		0.00
B-6	5.46693%		2,591,571.59		11,806.63		0.00		0.00		0.00		11,806.63		11,806.63		0.00
P	194,976.00000%		100.00		0.00		0.00		0.00		0.00		0.00		16,248.00		0.00

Total			704,336,382.02		2,363,811.69		0.00		0.00		0.00		2,363,812.14		2,380,059.69		0.45



Page 3 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
Collection Account Report
SUMMARY
SUMMARY
														Group 5
Principal Collections														670,499.32
Principal Withrawals														0.00
Principal Other Accounts														0.00
TOTAL NET PRINCIPAL														670,499.32
Interest Collections														170,757.40
Interest Withdrawals														-0.00
Interest Other Accounts														0.00
Interest Fees														-1,889.25
TOTAL NET INTEREST														168,868.15
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION														839,367.47

SUMMARY
SUMMARY
						Group 4		Group 3		Group 2		Group 1		Total
Principal Collections						1,602,196.03		5,336,980.80		5,835,616.27		3,579,018.14		17,024,310.56
Principal Withrawals						0.00		0.00		0.00		0.00		0.00
Principal Other Accounts						0.00		0.00		0.00		0.00		0.00
TOTAL NET PRINCIPAL						1,602,196.03		5,336,980.80		5,835,616.27		3,579,018.14		17,024,310.56
Interest Collections						227,117.34		952,157.70		470,700.11		599,060.52		2,419,793.06
Interest Withdrawals						-0.00		-0.00		-0.00		-0.00		-0.00
Interest Other Accounts						0.00		0.00		0.00		16,248.00		16,248.00
Interest Fees						-3,309.78		-15,392.22		-8,641.14		-10,500.97		-39,733.37
TOTAL NET INTEREST						223,807.56		936,765.48		462,058.97		588,559.54		2,380,059.69
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION						1,826,003.59		6,273,746.28		6,297,675.24		4,167,577.68		19,404,370.25





Page 4 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

PRINCIPAL - COLLECTIONS
PRINCIPAL - COLLECTIONS
															Group 5
Scheduled Principal Received															3,611.75
Curtailments															11,888.15
Prepayments In Full															654,999.42
Repurchased/Substitutions															0.00
Liquidations															0.00
Insurance Principal															0.00
Other Additional Principal															0.00
Delinquent Principal															-3,398.85
Realized Losses															-0.00
Principal Recoveries
Advanced Principal															3,398.85
TOTAL PRINCIPAL COLLECTED															670,499.32
PRINCIPAL - COLLECTIONS
PRINCIPAL - COLLECTIONS
							Group 4		Group 3		Group 2		Group 1		Total
Scheduled Principal Received							10,661.94		19,767.69		12,079.08		2,421.13		48,541.59
Curtailments							3,489.70		20,822.41		29,959.52		404,853.02		471,012.80
Prepayments In Full							1,588,044.39		5,296,390.70		5,793,577.67		3,171,743.99		16,504,756.17
Repurchased/Substitutions							0.00		0.00		0.00		0.00		0.00
Liquidations							0.00		0.00		0.00		0.00		0.00
Insurance Principal							0.00		0.00		0.00		0.00		0.00
Other Additional Principal							0.00		0.00		0.00		0.00		0.00
Delinquent Principal							-8,857.66		-16,565.14		-9,713.02		-1,908.60		-40,443.27
Realized Losses							-0.00		-0.00		-0.00		-0.00		-0.00
Principal Recoveries
Advanced Principal							8,857.66		16,565.14		9,713.02		1,908.60		40,443.27
TOTAL PRINCIPAL COLLECTED							1,602,196.03		5,336,980.80		5,835,616.27		3,579,018.14		17,024,310.56


PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK





Page 5 of 41
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2005-AR3

August 25, 2005 Distribution

PRINCIPAL - OTHER ACCOUNTS
PRINCIPAL - OTHER ACCOUNTS
														Group 5
TOTAL PRINCIPAL OTHER ACCOUNTS														0.00

PRINCIPAL - OTHER ACCOUNTS
PRINCIPAL - OTHER ACCOUNTS
						Group 4		Group 3		Group 2		Group 1		Total
TOTAL PRINCIPAL OTHER ACCOUNTS						0.00		0.00		0.00		0.00		0.00



INTEREST - COLLECTIONS
INTEREST - COLLECTIONS
														Group 5
Scheduled Interest														180,242.12
Repurchased/Substitution Interest														0.00
Liquidation Interest														0.00
Insurance Interest														0.00
Other Additional Interest														0.00
Prepayment Interest Shortfalls														-0.00
Delinquent Interest														-152,966.22
Interest Realized Losses
Compensating Interest														0.00
Civil Relief Act Shortfalls														-0.00
Interest Advanced														143,481.49
TOTAL INTEREST COLLECTED														170,757.40
INTEREST - COLLECTIONS
INTEREST - COLLECTIONS
						Group 4		Group 3		Group 2		Group 1		Total
Scheduled Interest						239,241.78		1,001,845.17		494,772.00		612,857.09		2,528,958.16
Repurchased/Substitution Interest						0.00		0.00		0.00		0.00		0.00
Liquidation Interest						0.00		0.00		0.00		0.00		0.00
Insurance Interest						0.00		0.00		0.00		0.00		0.00
Other Additional Interest						0.00		0.00		0.00		16,248.00		16,248.00
Prepayment Interest Shortfalls						-1,323.51		-3,865.30		-2,302.10		-1,617.47		-9,108.38
Delinquent Interest						-191,763.41		-777,998.87		-373,472.64		-462,643.35		-1,958,844.49
Interest Realized Losses
Compensating Interest						1,323.51		3,865.30		2,302.10		1,617.47		9,108.38
Civil Relief Act Shortfalls						-0.00		-0.00		-0.00		-0.00		-0.00
Interest Advanced						179,638.97		728,311.39		349,400.75		432,598.78		1,833,431.38
TOTAL INTEREST COLLECTED						227,117.34		952,157.70		470,700.11		599,060.52		2,419,793.06




Page 6 of 41
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Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

INTEREST - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK



INTEREST - OTHER ACCOUNTS
INTEREST - OTHER ACCOUNTS
														Group 5
Prepayment Charges														0.00
TOTAL INTEREST OTHER ACCOUNTS														0.00

INTEREST - OTHER ACCOUNTS
INTEREST - OTHER ACCOUNTS
						Group 4		Group 3		Group 2		Group 1		Total
Prepayment Charges						0.00		0.00		0.00		16,248.00		16,248.00
TOTAL INTEREST OTHER ACCOUNTS						0.00		0.00		0.00		16,248.00		16,248.00





Page 7 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

INTEREST - FEES
INTEREST - FEES
														Group 5
Current Servicing Fees														1,695.46
Trustee Fees														193.79
TOTAL INTEREST FEES														1,889.25

INTEREST - FEES
INTEREST - FEES
						Group 4		Group 3		Group 2		Group 1		Total
Current Servicing Fees						3,046.81		14,283.39		7,827.62		9,810.16		36,663.44
Trustee Fees						262.97		1,108.83		552.92		690.82		2,809.33
TOTAL INTEREST FEES						3,309.78		15,392.22		8,641.14		10,500.97		39,733.37




Page 8 of 41
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Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
Credit Enhancement Report
ACCOUNTS


SPACE INTENTIONALLY LEFT BLANK





INSURANCE
INSURANCE
														Group 5
PMI PREMIUM														0.00

INSURANCE
INSURANCE
						Group 4		Group 3		Group 2		Group 1		Total
PMI PREMIUM						0.00		0.00		260.60		0.00		260.60



STRUCTURAL FEATURES

SPACE INTENTIONALLY LEFT BLANK



Page 9 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

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Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
Collateral Report


COLLATERAL



															Group 5



Loan Count:


Original														92
Prior														88
Prefunding														0
Scheduled Paid Offs														-0
Full Voluntary Prepayments														-2
Repurchases														-0
Liquidations														-0
Current														86
Principal Balance:


Original														37,681,384.53
Prior														35,776,593.57
Prefunding														0.00
Scheduled Principal														-3,611.75
Partial Prepayments														-11,888.15
Full Voluntary Prepayments														-654,999.42
Repurchases														-0.00
Liquidations														-0.00
Current														35,106,094.25

COLLATERAL



							Group 4		Group 3		Group 2		Group 1		Total



Loan Count:
Loan Count:


Original						179		761		225		633		1,890
Prior						170		702		192		553		1,705
Prefunding						0		0		0		0		0
Scheduled Paid Offs						-0		-0		-0		-0		-0
Full Voluntary Prepayments						-4		-20		-11		-14		-51
Repurchases						-0		-0		-0		-0		-0
Liquidations						-0		-0		-0		-0		-0
Current						166		682		181		539		1,654
Principal Balance:


Original						51,390,338.04		221,205,705.73		119,852,937.91		145,954,981.58		576,085,347.79
Prior						48,548,003.76		204,706,779.95		102,078,442.27		127,535,132.89		518,644,952.44
Prefunding						0.00		0.00		0.00		0.00		0.00
Scheduled Principal						-10,661.94		-19,767.69		-12,079.08		-2,421.13		-48,541.59
Partial Prepayments						-3,489.70		-20,822.41		-29,959.52		-404,853.02		-471,012.80
Full Voluntary Prepayments						-1,588,044.39		-5,296,390.70		-5,793,577.67		-3,171,743.99		-16,504,756.17
Repurchases						-0.00		-0.00		-0.00		-0.00		-0.00
Liquidations						-0.00		-0.00		-0.00		-0.00		-0.00
Current						46,945,807.73		199,369,799.15		96,242,826.00		123,956,114.75		501,620,641.88







Page 10 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

PREFUNDING

SPACE INTENTIONALLY LEFT BLANK







Page 11 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

CHARACTERISTICS
CHARACTERISTICS
														Group 5
Weighted Average Coupon Original														6.05031%
Weighted Average Coupon Prior														6.04474%
Weighted Average Coupon Current														6.04559%
Weighted Average Months to Maturity Original														358
Weighted Average Months to Maturity Prior														354
Weighted Average Months to Maturity Current														353
Weighted Avg Remaining Amortization Term Original														358
Weighted Avg Remaining Amortization Term Prior														354
Weighted Avg Remaining Amortization Term Current														353
Weighted Average Seasoning Original														1.95
Weighted Average Seasoning Prior														5.94
Weighted Average Seasoning Current														6.93
CHARACTERISTICS
CHARACTERISTICS
						Group 4		Group 3		Group 2		Group 1		Total
Weighted Average Coupon Original						5.92126%		5.87557%		5.84973%		5.77684%		5.86069%
Weighted Average Coupon Prior						5.91838%		5.87257%		5.83194%		5.76634%		5.85397%
Weighted Average Coupon Current						5.91353%		5.87286%		5.81637%		5.76648%		5.85130%
Weighted Average Months to Maturity Original						358		358		358		358		358
Weighted Average Months to Maturity Prior						353		354		354		354		354
Weighted Average Months to Maturity Current						352		353		353		353		353
Weighted Avg Remaining Amortization Term Original						358		358		358		358		358
Weighted Avg Remaining Amortization Term Prior						353		354		354		354		354
Weighted Avg Remaining Amortization Term Current						352		353		353		353		353
Weighted Average Seasoning Original						2.25		1.96		1.69		2.17		1.98
Weighted Average Seasoning Prior						6.22		5.93		5.69		6.16		5.97
Weighted Average Seasoning Current						7.20		6.94		6.69		7.17		6.97





Page 12 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution






Page 13 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

ARM CHARACTERISTICS
ARM CHARACTERISTICS
														Group 5
Weighted Average Margin Original														2.75000%
Weighted Average Margin Prior														2.75000%
Weighted Average Margin Current														2.75000%
Weighted Average Max Rate Original														12.05031%
Weighted Average Max Rate Prior														12.04474%
Weighted Average Max Rate Current														12.04559%
Weighted Average Min Rate Original														2.75000%
Weighted Average Min Rate Prior														2.75000%
Weighted Average Min Rate Current														2.75000%
Weighted Average Cap Up Original														1.00000%
Weighted Average Cap Up Prior														1.00000%
Weighted Average Cap Up Current														1.00000%
Weighted Average Cap Down Original														1.00000%
Weighted Average Cap Down Prior														1.00000%
Weighted Average Cap Down Current														1.00000%

ARM CHARACTERISTICS
ARM CHARACTERISTICS
						Group 4		Group 3		Group 2		Group 1		Total
Weighted Average Margin Original						2.74723%		2.73448%		2.75112%		2.75815%		2.74609%
Weighted Average Margin Prior						2.74717%		2.73487%		2.74329%		2.75895%		2.74469%
Weighted Average Margin Current						2.74710%		2.73492%		2.74550%		2.75563%		2.74428%
Weighted Average Max Rate Original						11.92126%		11.84103%		11.85466%		11.75877%		11.84387%
Weighted Average Max Rate Prior						11.91838%		11.83993%		11.83750%		11.74648%		11.83732%
Weighted Average Max Rate Current						11.91353%		11.84026%		11.82213%		11.74582%		11.83449%
Weighted Average Min Rate Original						2.74723%		2.73448%		2.75112%		2.75815%		2.74609%
Weighted Average Min Rate Prior						2.74717%		2.73487%		2.74329%		2.75895%		2.74469%
Weighted Average Min Rate Current						2.74710%		2.73492%		2.74550%		2.75563%		2.74428%
Weighted Average Cap Up Original						1.00000%		1.68534%		1.67477%		1.67999%		1.57582%
Weighted Average Cap Up Prior						1.00000%		1.68361%		1.66024%		1.68657%		1.56996%
Weighted Average Cap Up Current						1.00000%		1.68115%		1.65306%		1.68315%		1.56537%
Weighted Average Cap Down Original						1.00000%		1.68534%		1.67477%		1.67999%		1.57582%
Weighted Average Cap Down Prior						1.00000%		1.68361%		1.66024%		1.68657%		1.56996%
Weighted Average Cap Down Current						1.00000%		1.68115%		1.65306%		1.68315%		1.56537%





Page 14 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

SERVICING FEES & ADVANCES

															Group 5




Current Servicing Fees														1,695.46
Delinquent Servicing Fees														9,484.73
TOTAL SERVICING FEES														11,180.19


Total Servicing Fees														11,180.19
Compensating Interest														-0.00
Delinquent Servicing Fees														-9,484.73
COLLECTED SERVICING FEES														1,695.46


Total Advanced Interest														143,481.49
Total Advanced Principal														3,398.85
Aggregate Advances with respect to this Distribution														146,880.34

SERVICING FEES & ADVANCES
SERVICING FEES & ADVANCES

							Group 4		Group 3		Group 2		Group 1		Total




Current Servicing Fees						3,046.81		14,283.39		7,827.62		9,810.16		36,663.44
Delinquent Servicing Fees						12,124.44		49,687.48		24,071.89		30,044.57		125,413.11
TOTAL SERVICING FEES						15,171.25		63,970.87		31,899.51		39,854.73		162,076.55


Total Servicing Fees						15,171.25		63,970.87		31,899.51		39,854.73		162,076.55
Compensating Interest						-1,323.51		-3,865.30		-2,302.10		-1,617.47		-9,108.38
Delinquent Servicing Fees						-12,124.44		-49,687.48		-24,071.89		-30,044.57		-125,413.11
COLLECTED SERVICING FEES						1,723.30		10,418.09		5,525.52		8,192.70		27,555.07


Total Advanced Interest						179,638.97		728,311.39		349,400.75		432,598.78		1,833,431.38
Total Advanced Principal						8,857.66		16,565.14		9,713.02		1,908.60		40,443.27
Aggregate Advances with respect to this Distribution						188,496.63		744,876.53		359,113.77		434,507.38		1,873,874.66







Page 15 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

ADDITIONAL COLLATERAL INFORMATION
														Group 5
Prepayment Interest Shortfall (PPIS)														0.00
Compensating Interest														-0.00
Net Prepayment Interest Shortfall (PPIS)														0.00
Weighted Average Net Mortgage Rate														5.664088%

ADDITIONAL COLLATERAL INFORMATION
						Group 4		Group 3		Group 2		Group 1		Total
Prepayment Interest Shortfall (PPIS)						1,323.51		3,865.30		2,302.10		1,617.47		9,108.38
Compensating Interest						-1,323.51		-3,865.30		-2,302.10		-1,617.47		-9,108.38
Net Prepayment Interest Shortfall (PPIS)						0.00		0.00		0.00		0.00		0.00
Weighted Average Net Mortgage Rate						5.532031%		5.491360%		5.431811%		5.384978%




Page 16 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
Delinquency Report

	TOTAL
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				7,076,935.29		839,171.54		0.00		7,916,106.83
			% Balance				1.41%		0.17%		0.00%		1.58%
			# Loans				22		4		0		26
			% # Loans				1.33%		0.24%		0.00%		1.57%
	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		7,076,935.29		839,171.54		0.00		7,916,106.83
			% Balance		0.00%		1.41%		0.17%		0.00%		1.58%
			# Loans		0		22		4		0		26
			% # Loans		0.00%		1.33%		0.24%		0.00%		1.57%









Page 17 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution


	GROUP 1
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				2,297,329.95		406,360.21		0.00		2,703,690.16
			% Balance				1.85%		0.33%		0.00%		2.18%
			# Loans				9		2		0		11
			% # Loans				1.67%		0.37%		0.00%		2.04%
	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		2,297,329.95		406,360.21		0.00		2,703,690.16
			% Balance		0.00%		1.85%		0.33%		0.00%		2.18%
			# Loans		0		9		2		0		11
			% # Loans		0.00%		1.67%		0.37%		0.00%		2.04%










Page 18 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

	GROUP 2
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				1,915,200.00		0.00		0.00		1,915,200.00
			% Balance				1.99%		0.00%		0.00%		1.99%
			# Loans				3		0		0		3
			% # Loans				1.66%		0.00%		0.00%		1.66%
	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		1,915,200.00		0.00		0.00		1,915,200.00
			% Balance		0.00%		1.99%		0.00%		0.00%		1.99%
			# Loans		0		3		0		0		3
			% # Loans		0.00%		1.66%		0.00%		0.00%		1.66%










Page 19 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

	GROUP 3
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				1,916,402.24		139,920.00		0.00		2,056,322.24
			% Balance				0.96%		0.07%		0.00%		1.03%
			# Loans				6		1		0		7
			% # Loans				0.88%		0.15%		0.00%		1.03%
	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		1,916,402.24		139,920.00		0.00		2,056,322.24
			% Balance		0.00%		0.96%		0.07%		0.00%		1.03%
			# Loans		0		6		1		0		7
			% # Loans		0.00%		0.88%		0.15%		0.00%		1.03%










Page 20 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

	GROUP 4
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				630,803.10		0.00		0.00		630,803.10
			% Balance				1.34%		0.00%		0.00%		1.34%
			# Loans				3		0		0		3
			% # Loans				1.81%		0.00%		0.00%		1.81%
	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		630,803.10		0.00		0.00		630,803.10
			% Balance		0.00%		1.34%		0.00%		0.00%		1.34%
			# Loans		0		3		0		0		3
			% # Loans		0.00%		1.81%		0.00%		0.00%		1.81%










Page 21 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

	GROUP 5
					< 1 PAYMENT		1 PAYMENT		2 PAYMENTS		3+ PAYMENTS		TOTAL
	DELINQUENT		Balance				317,200.00		292,891.33		0.00		610,091.33
			% Balance				0.90%		0.83%		0.00%		1.74%
			# Loans				1		1		0		2
			% # Loans				1.16%		1.16%		0.00%		2.33%
	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		317,200.00		292,891.33		0.00		610,091.33
			% Balance		0.00%		0.90%		0.83%		0.00%		1.74%
			# Loans		0		1		1		0		2
			% # Loans		0.00%		1.16%		1.16%		0.00%		2.33%









Page 22 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
REO Report
Loan Number			Original		Stated				Current		State &

														First
&			Principal		Principal		Paid to		Note		LTV at		Original		Payment

Loan Group			Balance		Balance		Date		Rate		Origination		Term		Date




TOTAL


Page 23 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
Foreclosure Report
Loan Number			Original		Stated				Current		State &

														First
&			Principal		Principal		Paid to		Note		LTV at		Original		Payment

Loan Group			Balance		Balance		Date		Rate		Origination		Term		Date




TOTAL


Page 24 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
Prepayment Report

VOLUNTARY PREPAYMENTS
VOLUNTARY PREPAYMENTS

															Group 5




Current


Number of Paid in Full Loans														2
Number of Repurchased Loans														0
Total Number of Loans Prepaid in Full														2
Curtailments Amount														11,888.15
Paid in Full Balance														654,999.42
Repurchased Loans Balance														0.00
Total Prepayment Amount														666,887.57

Cumulative


Number of Paid in Full Loans														6
Number of Repurchased Loans														0
Total Number of Loans Prepaid in Full														6
Paid in Full Balance														2,427,704.65
Repurchased Loans Balance														0.00
Curtailments Amount														124,987.33
Total Prepayment Amount														2,552,691.98

VOLUNTARY PREPAYMENTS

							Group 4		Group 3		Group 2		Group 1		Total




Current


Number of Paid in Full Loans						4		20		11		14		51
Number of Repurchased Loans						0		0		0		0		0
Total Number of Loans Prepaid in Full						4		20		11		14		51
Curtailments Amount						3,489.70		20,822.41		29,959.52		404,853.02		471,012.80
Paid in Full Balance						1,588,044.39		5,296,390.70		5,793,577.67		3,171,743.99		16,504,756.17
Repurchased Loans Balance						0.00		0.00		0.00		0.00		0.00
Total Prepayment Amount						1,591,534.09		5,317,213.11		5,823,537.19		3,576,597.01		16,975,768.97

Cumulative


Number of Paid in Full Loans						13		79		44		94		236
Number of Repurchased Loans						0		0		0		0		0
Total Number of Loans Prepaid in Full						13		79		44		94		236
Paid in Full Balance						4,269,529.82		21,338,285.29		23,344,719.49		21,516,641.42		72,896,880.67
Repurchased Loans Balance						0.00		0.00		0.00		0.00		0.00
Curtailments Amount						106,575.69		383,784.67		184,630.15		466,418.95		1,266,396.79
Total Prepayment Amount						4,376,105.51		21,722,069.96		23,529,349.64		21,983,060.37		74,163,277.46





Page 25 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution






Page 26 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

VOLUNTARY PREPAYMENTS RATES
VOLUNTARY PREPAYMENTS RATES

															Group 5



SMM														1.86%
3 Months Avg SMM														2.02%
12 Months Avg SMM														1.16%
Avg SMM Since Cut-off														1.16%


CPR														20.21%
3 Months Avg CPR														21.73%
12 Months Avg CPR														13.10%
Avg CPR Since Cut-off														13.10%


PSA														1,457.46%
3 Months Avg PSA Approximation														1,830.74%
12 Months Avg PSA Approximation														1,473.99%
Avg PSA Since Cut-off Approximation														1,473.98%

VOLUNTARY PREPAYMENTS RATES



							Group 4		Group 3		Group 2		Group 1		Total



SMM						3.28%		2.60%		5.71%		2.80%		3.27%
3 Months Avg SMM						2.14%		2.22%		4.08%		3.61%		2.91%
12 Months Avg SMM						1.47%		1.71%		3.58%		2.68%		2.27%
Avg SMM Since Cut-off						1.47%		1.71%		3.58%		2.68%		2.27%


CPR						32.97%		27.08%		50.59%		28.92%		32.93%
3 Months Avg CPR						22.83%		23.64%		39.38%		35.66%		29.87%
12 Months Avg CPR						16.32%		18.68%		35.42%		27.86%		24.10%
Avg CPR Since Cut-off						16.32%		18.68%		35.42%		27.86%		24.10%


PSA						2,290.05%		1,952.02%		3,780.21%		2,017.19%		2,361.56%
3 Months Avg PSA Approximation						1,833.38%		1,990.33%		3,462.65%		2,892.46%		2,501.54%
12 Months Avg PSA Approximation						1,722.44%		2,099.64%		4,231.41%		2,986.89%		2,691.76%
Avg PSA Since Cut-off Approximation						1,722.44%		2,099.63%		4,231.40%		2,986.88%		2,691.75%







Page 27 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution











Page 28 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

PREPAYMENT CALCULATION METHODOLOGY

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases + Liquidations )/(Beg Principal Balance - Sched Principal) Conditional Prepayment Rate (CPR): 1-((1-SMM)^12) PSA Standard Prepayment Model: CPR/(0.002min(30,WAS)) Average SMM over period between nth month and mth month (AvgSMMn,m): [(1-SMMn)(1-SMMn+1)...(1-SMMm)]^(1/months in period n,m) Conditional Prepayment Rate (CPR): 1-((1-SMM)^12) Average PSA Approximation over period between the nth month and mth month: AvgCPRn,m/(0.002*Avg WASn,m)) Average WASn,m: (min(30,WASn)+min(30,WASn+1)+...+min(30,WASm)/(number of months in the period n,m) Weighted Average Seasoning (WAS) Dates correspond to distribution dates. Note: Prepayment rates are calculated since deal issue date and include partial and full voluntary prepayments, liquidations, and repurchases.













Page 29 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
Prepayment Detail Report
Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution
Loan Number			Original							Current		State &		Type Prepayment		First
Loan 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

3611044 3			172,775.00		172,774.25			21-Jul-2005		5.750%		AZ - 80.00%		Paid Off - 360		01-Feb-2005
			172,775.00

3769630 1			156,960.00		156,960.00			15-Aug-2005		5.250%		NV - 80.00%		Paid Off - 360		01-Jan-2005
3769630 1					156,960.00			15-Aug-2005		5.250%		NV - 80.00%		Paid Off - 360		01-Jan-2005
3797956 3			190,780.00		190,779.98			08-Aug-2005		5.750%		FL - 80.00%		Paid Off - 360		01-Feb-2005
3797956 3					190,779.98			08-Aug-2005		5.750%		FL - 80.00%		Paid Off - 360		01-Feb-2005
120096083 1			131,350.00		131,349.98			18-Jul-2005		5.875%		NV - 80.00%		Paid Off - 360		01-Jan-2005
120096083 1					131,349.98			18-Jul-2005		5.875%		NV - 80.00%		Paid Off - 360		01-Jan-2005
120314092 4			178,324.00		176,844.39			03-Aug-2005		5.875%		MO - 80.00%		Paid Off - 360		01-Dec-2004
120314092 4					176,844.39			03-Aug-2005		5.875%		MO - 80.00%		Paid Off - 360		01-Dec-2004
120421977 1			349,450.00		349,450.00			09-Aug-2005		5.250%		VA - 79.99%		Paid Off - 360		01-Feb-2005
120421977 1					349,450.00			09-Aug-2005		5.250%		VA - 79.99%		Paid Off - 360		01-Feb-2005
120455031 3			295,898.00		295,897.99			03-Aug-2005		6.250%		FL - 90.00%		Paid Off - 360		01-Feb-2005
120455031 3					295,897.99			03-Aug-2005		6.250%		FL - 90.00%		Paid Off - 360		01-Feb-2005
120486086 4			300,000.00		300,000.00			01-Aug-2005		6.500%		CA - 66.67%		Paid Off - 360		01-Dec-2004
120486086 4					300,000.00			01-Aug-2005		6.500%		CA - 66.67%		Paid Off - 360		01-Dec-2004
120508166 3			169,500.00		167,515.00			29-Jul-2005		6.250%		FL - 79.99%		Paid Off - 360		01-Feb-2005
120508166 3					167,515.00			29-Jul-2005		6.250%		FL - 79.99%		Paid Off - 360		01-Feb-2005
120514433 1			108,535.00		107,495.11			04-Aug-2005		6.500%		PA - 70.00%		Paid Off - 360		01-Dec-2004
120514433 1					107,495.11			04-Aug-2005		6.500%				Paid Off - 360		01-Dec-2004
120517803 1			232,000.00		232,000.00			15-Aug-2005		6.000%		IL - 75.82%		Paid Off - 360		01-Jan-2005
120517803 1					232,000.00			15-Aug-2005		6.000%		IL - 75.82%		Paid Off - 360		01-Jan-2005
120524592 1			214,798.00		214,797.98			22-Jul-2005		6.125%		FL - 95.00%		Paid Off - 360		01-Jan-2005
120524592 1					214,797.98			22-Jul-2005		6.125%		FL - 95.00%		Paid Off - 360		01-Jan-2005
120547166 1			184,000.00		183,452.97			03-Aug-2005		6.000%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120547166 1					183,452.97			03-Aug-2005		6.000%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120570508 1			132,000.00		132,000.00			28-Jul-2005		5.375%		VA - 80.00%		Paid Off - 360		01-Feb-2005
120570508 1					132,000.00			28-Jul-2005		5.375%		VA - 80.00%		Paid Off - 360		01-Feb-2005
120571689 4			464,000.00		464,000.00			19-Jul-2005		6.375%		FL - 80.00%		Paid Off - 360		01-Jan-2005
120571689 4					464,000.00			19-Jul-2005		6.375%		FL - 80.00%		Paid Off - 360		01-Jan-2005
120580988 1			322,800.00		322,799.99			02-Aug-2005		5.125%		CA - 64.56%		Paid Off - 360		01-Jan-2005
120580988 1					322,799.99			02-Aug-2005		5.125%		CA - 64.56%		Paid Off - 360		01-Jan-2005
120589088 3			263,200.00		263,135.57			18-Jul-2005		5.875%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120589088 3					263,135.57			18-Jul-2005		5.875%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120603869 3			300,000.00		300,000.00			01-Aug-2005		7.000%		MD - 76.92%		Paid Off - 360		01-Feb-2005
120603869 3					300,000.00			01-Aug-2005		7.000%		MD - 76.92%		Paid Off - 360		01-Feb-2005
120605571 5			238,627.00		238,428.64			15-Aug-2005		6.000%		AZ - 80.00%		Paid Off - 360		01-Feb-2005
120605571 5					238,428.64			15-Aug-2005		6.000%		AZ - 80.00%		Paid Off - 360		01-Feb-2005
120608399 1			257,973.00		257,972.98			22-Jul-2005		5.500%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120608399 1					257,972.98			22-Jul-2005		5.500%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120611894 5			416,850.00		416,570.78			11-Aug-2005		6.750%		CA - 79.99%		Paid Off - 360		01-Feb-2005
120611894 5					416,570.78			11-Aug-2005		6.750%		CA - 79.99%		Paid Off - 360		01-Feb-2005
120613445 1			268,000.00		268,000.00			26-Jul-2005		7.000%		NJ - 80.00%		Paid Off - 360		01-Mar-2005
120613445 1					268,000.00			26-Jul-2005		7.000%		NJ - 80.00%		Paid Off - 360		01-Mar-2005
120625864 2			650,000.00		564,422.77			08-Aug-2005		5.250%		CA - 74.71%		Paid Off - 360		01-Feb-2005
120625864 2					564,422.77			08-Aug-2005		5.250%		CA - 74.71%		Paid Off - 360		01-Feb-2005
120629883 2			451,500.00		451,500.00			05-Aug-2005		6.375%		CT - 75.00%		Paid Off - 360		01-Mar-2005
120629883 2					451,500.00			05-Aug-2005		6.375%		CT - 75.00%		Paid Off - 360		01-Mar-2005
120640405 3			166,400.00		166,400.00			26-Jul-2005		6.250%		CA - 80.00%		Paid Off - 360		01-Jan-2005
120640405 3					166,400.00			26-Jul-2005		6.250%		CA - 80.00%		Paid Off - 360		01-Jan-2005
120642194 3			164,000.00		164,000.00			04-Aug-2005		6.000%		AZ - 80.00%		Paid Off - 360		01-Feb-2005
120642194 3					164,000.00			04-Aug-2005		6.000%		AZ - 80.00%		Paid Off - 360		01-Feb-2005
120648065 3			113,600.00		113,573.37			05-Aug-2005		5.625%		FL - 80.00%		Paid Off - 360		01-Feb-2005
120648065 3					113,573.37			05-Aug-2005		5.625%		FL - 80.00%		Paid Off - 360		01-Feb-2005
120649813 3			650,000.00		650,000.00			15-Aug-2005		5.625%		CA - 68.42%		Paid Off - 360		01-Feb-2005
120649813 3					650,000.00			15-Aug-2005		5.625%		CA - 68.42%		Paid Off - 360		01-Feb-2005
120668908 3			348,000.00		348,000.00			22-Jul-2005		6.250%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120668908 3					348,000.00			22-Jul-2005		6.250%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120674070 3			190,000.00		190,000.00			11-Aug-2005		5.500%		AZ - 79.17%		Paid Off - 360		01-Feb-2005
120674070 3					190,000.00			11-Aug-2005		5.500%		AZ - 79.17%		Paid Off - 360		01-Feb-2005
120678602 1			323,465.00		323,464.98			09-Aug-2005		6.500%		FL - 95.00%		Paid Off - 360		01-Feb-2005
120678602 1					323,464.98			09-Aug-2005		6.500%		FL - 95.00%		Paid Off - 360		01-Feb-2005
120698102 2			667,500.00		667,500.00			20-Jul-2005		6.625%		VA - 75.00%		Paid Off - 360		01-Feb-2005
120698102 2					667,500.00			20-Jul-2005		6.625%		VA - 75.00%		Paid Off - 360		01-Feb-2005
120699102 2			446,510.00		446,510.00			29-Jul-2005		5.875%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120699102 2					446,510.00			29-Jul-2005		5.875%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120715003 2			384,000.00		384,000.00			02-Aug-2005		6.625%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120715003 2					384,000.00			02-Aug-2005		6.625%		CA - 80.00%		Paid Off - 360		01-Feb-2005
120717890 3			279,700.00		279,105.27			10-Aug-2005		6.000%		CA - 79.99%		Paid Off - 360		01-Feb-2005
120717890 3					279,105.27			10-Aug-2005		6.000%		CA - 79.99%		Paid Off - 360		01-Feb-2005
120719359 2			900,000.00		900,000.00			10-Aug-2005		6.000%		DC - 56.96%		Paid Off - 360		01-Mar-2005
120719359 2					900,000.00			10-Aug-2005		6.000%		DC - 56.96%		Paid Off - 360		01-Mar-2005
120722644 2			659,900.00		659,900.00			27-Jul-2005		5.500%		CA - 79.99%		Paid Off - 360		01-Feb-2005
120722644 2					659,900.00					5.500%		CA - 79.99%		Paid Off - 360


Page 30 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 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

120726572 2			400,000.00		399,744.90			29-Jul-2005		5.500%		CA - 88.89%		Paid Off - 360		01-Feb-2005
			400,000.00

120727486 2			400,000.00		400,000.00			10-Aug-2005		6.500%		CA - 76.92%		Paid Off - 360		01-Feb-2005
120727486 2					400,000.00			10-Aug-2005		6.500%		CA - 76.92%		Paid Off - 360		01-Feb-2005
120735076 3			153,540.00		153,540.00			20-Jul-2005		6.250%		NV - 80.00%		Paid Off - 360		01-Feb-2005
120735076 3					153,540.00			20-Jul-2005		6.250%		NV - 80.00%		Paid Off - 360		01-Feb-2005
120741378 3			316,000.00		316,000.00			22-Jul-2005		6.000%		VA - 78.03%		Paid Off - 360		01-Mar-2005
120741378 3					316,000.00			22-Jul-2005		6.000%		VA - 78.03%		Paid Off - 360		01-Mar-2005
120741464 3			216,000.00		215,969.27			20-Jul-2005		6.875%		CA - 80.00%		Paid Off - 360		01-Mar-2005
120741464 3					215,969.27			20-Jul-2005		6.875%		CA - 80.00%		Paid Off - 360		01-Mar-2005
120750992 2			472,000.00		472,000.00			10-Aug-2005		5.500%		MD - 80.00%		Paid Off - 360		01-Mar-2005
120750992 2					472,000.00			10-Aug-2005		5.500%		MD - 80.00%		Paid Off - 360		01-Mar-2005
120770759 3			268,200.00		268,200.00			05-Aug-2005		5.625%		CA - 79.99%		Paid Off - 360		01-Feb-2005
120770759 3					268,200.00			05-Aug-2005		5.625%		CA - 79.99%		Paid Off - 360		01-Feb-2005
120775307 3			440,000.00		440,000.00			21-Jul-2005		6.375%		AZ - 80.00%		Paid Off - 360		01-Mar-2005
120775307 3					440,000.00			21-Jul-2005		6.375%		AZ - 80.00%		Paid Off - 360		01-Mar-2005
120777547 2			448,000.00		448,000.00			25-Jul-2005		5.750%		CA - 80.00%		Paid Off - 360		01-Mar-2005
120777547 2					448,000.00			25-Jul-2005		5.750%		CA - 80.00%		Paid Off - 360		01-Mar-2005
120782082 4			647,200.00		647,200.00			27-Jul-2005		5.875%		VA - 80.00%		Paid Off - 360		01-Feb-2005
120782082 4					647,200.00			27-Jul-2005		5.875%		VA - 80.00%		Paid Off - 360		01-Feb-2005
120787250 1			292,000.00		292,000.00			21-Jul-2005		5.500%		MD - 80.00%		Paid Off - 360		01-Mar-2005
120787250 1					292,000.00			21-Jul-2005		5.500%		MD - 80.00%		Paid Off - 360		01-Mar-2005
120797943 3			201,600.00		201,500.00			27-Jul-2005		5.625%		CA - 80.00%		Paid Off - 360		01-Mar-2005
120797943 3					201,500.00			27-Jul-2005		5.625%		CA - 80.00%		Paid Off - 360		01-Mar-2005
120802655 1			200,000.00		200,000.00			02-Aug-2005		6.500%		AZ - 80.00%		Paid Off - 360		01-Mar-2005
120802655 1					200,000.00			02-Aug-2005		6.500%		AZ - 80.00%		Paid Off - 360		01-Mar-2005
120842109 3			400,000.00		400,000.00			25-Jul-2005		6.125%		CA - 80.00%		Paid Off - 360		01-Mar-2005
120842109 3					400,000.00			25-Jul-2005		6.125%		CA - 80.00%		Paid Off - 360		01-Mar-2005


TOTAL			16,596,935.00		16,504,756.17
TOTAL


Page 31 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
Realized Loss Report

COLLATERAL REALIZED LOSSES



															Group 5


Current
Current



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

Cumulative
Cumulative



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





		Special Hazard Loss Coverage Amt
		Fraud Loss Coverage Amt
		Bankruptcy Loss Coverage Amt

COLLATERAL REALIZED LOSSES



							Group 4		Group 3		Group 2		Group 1		Total


Current
Current



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

Cumulative
Cumulative



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





		Special Hazard Loss Coverage Amt														5,200,000.00
		Fraud Loss Coverage Amt														28,480,045.00
		Bankruptcy Loss Coverage Amt														231,909.00







Page 32 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution





Page 33 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution


DEFAULT SPEEDS



															Group 5



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


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


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


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

DEFAULT SPEEDS



							Group 4		Group 3		Group 2		Group 1		Total



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


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


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


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








Page 34 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution








Page 35 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution



COLLATERAL REALIZED LOSS CALCULATION METHODOLOGY
	Monthly Default Rate (MDR): (Beg Principal Balance of Liquidated Loans)/(Total Beg Principal Balance)



	Conditional Default Rate (CDR): 1-((1-MDR)^12)

	SDA Standard Default Assumption: CDR/IF(WAS<61,MIN(30,WAS)0.02,MAX(0.03,MIN(30,WAS)0.02-0.0095*(WAS-60)))

	Average MDR over period between nth month and mth month (AvgMDRn,m): [(1-MDRn)(1-MDRn+1)...*(1-MDRm)]^(1/months in period n,m)
	Average CDR over period between the nth month and mth month (AvgCDRn,m): 1-((1-AvgMDRn,m)^12)

	Average SDA Approximation over period between the nth month and mth month:
	AvgCDRn,m/IF(Avg WASn,m<61,MIN(30,Avg WASn,m)0.02,MAX(0.03,MIN(30,Avg WASn,m)0.02-0.0095*(Avg WASn,m-60)))

	Average WASn,m: (WASn + WASn+1 +...+ WASm )/(number of months in the period n,m)
	Loss Severity Approximation for current period: sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

	Average Loss Severity Approximation over period between nth month and mth month: Avg(Loss Severityn,m)

	Note: Default rates are calculated since deal issue date and include realized gains and additional realized losses and gains from prior periods.
	Dates correspond to distribution dates.




Page 36 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 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 37 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
Triggers and Adj. Cert. Report
TRIGGER EVENTS
TRIGGER EVENTS
														Group 5
						Has Optional Termination Date Reached (0=No,1=Yes)
						Has Sr. Credit Supp. Depletion Date Occured								0
						Has Spl. Haz. Cov. Term. Date Occured (0=No,1=Yes)
						Has Fraud Loss Coverage Term. Date Occured
						Has Bankrpt Loss Cov. Term. Date Occured

TRIGGER EVENTS
TRIGGER EVENTS
						Group 4		Group 3		Group 2		Group 1		Total
						Has Optional Termination Date Reached (0=No,1=Yes)								0
						Has Sr. Credit Supp. Depletion Date Occured		0		0		0		0
						0		0		0		0		0
						Has Spl. Haz. Cov. Term. Date Occured (0=No,1=Yes)								0
						Has Fraud Loss Coverage Term. Date Occured								0
						Has Bankrpt Loss Cov. Term. Date Occured								0



ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK





Page 38 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
														Group 5
Current Senior Percentage														90.946501%
Next Senior Percentage														90.774518%
Current Subordinate Percentage														9.053499%
Next Subordinate Percentage														9.225482%
Senior Prepayment Percentage														100.000000%
Next Senior Prepayment Percentage														100.000000%
Subordinate Prepayment Percentage														0.000000%
Next Subordinate Prepayment Percentage														0.000000%

ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
						Group 4		Group 3		Group 2		Group 1		Total
Current Senior Percentage						90.906737%		90.710884%		89.908562%		90.158862%
Next Senior Percentage						90.598462%		90.463142%		89.297941%		89.874908%
Current Subordinate Percentage						9.093263%		9.289116%		10.091438%		9.841138%
Next Subordinate Percentage						9.401538%		9.536858%		10.702059%		10.125092%
Senior Prepayment Percentage						100.000000%		100.000000%		100.000000%		100.000000%
Next Senior Prepayment Percentage						100.000000%		100.000000%		100.000000%		100.000000%
Subordinate Prepayment Percentage						0.000000%		0.000000%		0.000000%		0.000000%
Next Subordinate Prepayment Percentage						0.000000%		0.000000%		0.000000%		0.000000%




Page 39 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution
Other Related Information
ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
														Group 5
Current Scheduled Payments														183,853.87
Current Scheduled Payments 1 Month Prior														184,709.19
Current Scheduled Payments 2 Month Prior														192,036.27
Current Scheduled Payments 3 Month Prior														193,270.44
Current Scheduled Payments 4 Month Prior														193,883.85
Current Scheduled Payments 5 Month Prior														193,962.82
Current Scheduled Payments 6 Month Prior														0.00
Current Scheduled Payments 7 Month Prior														0.00
Current Scheduled Payments 8 Month Prior														0.00
Current Scheduled Payments 9 Month Prior														0.00
Current Scheduled Payments 10 Month Prior														0.00
Current Scheduled Payments 11 Month Prior														0.00


Sched. Payments for 60+Day Delinquent Loans														1,752.43
Sched. Pmts - 60+Day Delinquent Loans, 1 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 2 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 3 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 4 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 5 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 6 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 7 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 8 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 9 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 10 Month Prior														0.00
Sched. Pmts - 60+Day Delinquent Loans, 11 Month Prior														0.00


Next Period Pass Through Rate - Subordinated Classes

Class B-1 Writedown Amount
Class B-2 Writedown Amount
Class B-3 Writedown Amount
Class B-4 Writedown Amount
Class B-5 Writedown Amount
Class B-6 Writedown Amount



Page 40 of 41
IndyMac INDX Mortgage Loan Trust 2005-AR3

Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
2005-AR3

August 25, 2005 Distribution

ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
						Group 4		Group 3		Group 2		Group 1		Total
Current Scheduled Payments						249,903.72		1,021,612.86		506,851.08		615,278.22		2,577,499.75
Current Scheduled Payments 1 Month Prior						255,809.21		1,043,952.25		527,289.85		640,136.75		2,651,897.25
Current Scheduled Payments 2 Month Prior						258,760.75		1,062,493.96		545,315.22		668,584.60		2,727,190.80
Current Scheduled Payments 3 Month Prior						260,180.40		1,074,978.22		555,301.96		680,509.78		2,764,240.80
Current Scheduled Payments 4 Month Prior						264,773.68		1,089,772.95		586,222.89		698,187.70		2,832,841.08
Current Scheduled Payments 5 Month Prior						266,322.45		1,102,693.60		598,043.99		705,452.29		2,866,475.15
Current Scheduled Payments 6 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 7 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 8 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 9 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 10 Month Prior						0.00		0.00		0.00		0.00		0.00
Current Scheduled Payments 11 Month Prior						0.00		0.00		0.00		0.00		0.00


Sched. Payments for 60+Day Delinquent Loans						0.00		728.75		0.00		1,827.66		4,308.84
Sched. Pmts - 60+Day Delinquent Loans, 1 Month Prior						0.00		0.00		0.00		1,195.83		1,195.83
Sched. Pmts - 60+Day Delinquent Loans, 2 Month Prior						0.00		883.75		0.00		0.00		883.75
Sched. Pmts - 60+Day Delinquent Loans, 3 Month Prior						0.00		0.00		0.00		2,775.44		2,775.44
Sched. Pmts - 60+Day Delinquent Loans, 4 Month Prior						0.00		0.00		0.00		2,442.49		2,442.49
Sched. Pmts - 60+Day Delinquent Loans, 5 Month Prior						0.00		1,060.00		0.00		0.00		1,060.00
Sched. Pmts - 60+Day Delinquent Loans, 6 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 7 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 8 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 9 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 10 Month Prior						0.00		0.00		0.00		0.00		0.00
Sched. Pmts - 60+Day Delinquent Loans, 11 Month Prior						0.00		0.00		0.00		0.00		0.00


Next Period Pass Through Rate - Subordinated Classes														5.645930%

Class B-1 Writedown Amount														0.00
Class B-2 Writedown Amount														0.00
Class B-3 Writedown Amount														0.00
Class B-4 Writedown Amount														0.00
Class B-5 Writedown Amount														0.00
Class B-6 Writedown Amount




Page 41 of 41

IndyMac INDX Mortgage Loan Trust 2005-AR3 8-K