IndyMac INDX Mortgage Loan Trust 2007-AR7

Mortgage Pass-Through Certificates

May 25, 2007 Distribution

External Parties

Table of Contents

Page

Seller

1. Certificate Payment Report

IndyMac Bank

2. Collection Account Report

3. Credit Enhancement Report

Servicer(s)

4. Collateral Report

IndyMac Bank

5. Delinquency Report

6. REO Report

Underwriter(s)

7. Foreclosure Report

Citigroup

8. Prepayment Report

9. Prepayment Detail Report

10. Realized Loss Report

11. Realized Loss Detail Report

12. Triggers and Adj. Cert. Report

13. Additional Certificate Report

14. Other Related Information

Total Number of Pages

Dates

Contacts

Cut-Off Date:

April 01, 2007

Marion Hogan

Close Date:

April 27, 2007

Administrator

First Distribution Date:

May 25, 2007

(714) 247-6282

marion.c.hogan@db.com

Address:

Distribution Date:

May 25, 2007

1761 East St. Andrew Place, Santa Ana, CA 92705

Record Date:

April 30, 2007

Factor Information:

(800) 735-7777

May 24, 2007

Main Phone Number:

(714) 247-6000

Determination Date:

May 18, 2007

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

Page 1 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Certificate Payment Report
Current Period Distribution - REMIC III
			Prior						Current
			Prior

	Class	Original	Principal			Total	Realized	Deferred	Principal

Class	Type	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	93,259,000.00	93,259,000.00	436,762.98	2,875,763.85	3,312,526.83	0.00	0.00	90,383,236.15
1-A-1	SR	93,259,000.00	93,259,000.00	436,762.98	2,875,763.85	3,312,526.83	0.00	0.00	90,383,236.15
1-X	NTL/SR	0.00	0.00	115,365.60	0.00	115,365.60	0.00	0.00	0.00
2-A-1	SR	334,527,000.00	334,527,000.00	1,622,451.99	1,370,953.99	2,993,405.98	0.00	0.00	333,156,046.01
2-X	NTL/SR	0.00	0.00	69,693.13	0.00	69,693.13	0.00	0.00	0.00
A-R	RES/SR	100.00	100.00	0.52	100.00	100.52	0.00	0.00	0.00
B-1	SUB	13,338,000.00	13,338,000.00	67,195.58	1,133.24	68,328.82	0.00	0.00	13,336,866.76
B-2	SUB	10,258,000.00	10,258,000.00	51,678.83	871.55	52,550.38	0.00	0.00	10,257,128.45
B-3	SUB	7,181,000.00	7,181,000.00	37,673.24	610.12	38,283.36	0.00	0.00	7,180,389.88
B-4	SUB/NOF	5,130,000.00	5,130,000.00	26,913.20	435.86	27,349.06	0.00	0.00	5,129,564.14
B-5	SUB/NOF	3,847,000.00	3,847,000.00	20,182.28	326.85	20,509.13	0.00	0.00	3,846,673.15
B-6	SUB/NOF	2,820,988.00	2,820,988.00	14,799.58	239.68	15,039.26	0.00	0.00	2,820,748.32
B-IO	NTL/SR	0.00	0.00	4,915.83	0.00	4,915.83	0.00	0.00	0.00
C-M	NTL/SR	42,575,000.00	42,575,000.00	223,358.79	422,636.85	645,995.64	0.00	0.00	42,152,363.15
P-1	NOF	100.00	100.00	0.00	0.00	0.00	0.00	0.00	100.00
P-2	NOF	100.00	100.00	0.00	0.00	0.00	0.00	0.00	100.00
L	NOF	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00


Total		512,936,288.00	512,936,288.00	2,690,991.55	4,673,071.99	7,364,063.54	0.00	0.00	508,263,216.01
Total




Interest Accrual Detail Current Period Factor Information per $1,000 of Original Face Value
					Orig. Principal	Prior				Current
					Orig. Principal	Prior				Current
	Period	Period			(with Notional)	Principal			Total	Principal
Class	Starting	Ending	Method	Cusip	Balance	Balance	Interest	Principal	Distribution	Balance
			Method
					(1)	(1)	(2)	(3)	(4)=(2)+(3)	(5)

1-A-1	04/25/07	05/24/07	A-30/360	45670CAA5	93,259,000.00	1,000.000000	4.683333	30.836314	35.519648	969.163686
1-A-1	04/25/07	05/24/07	A-30/360	45670CAA5	93,259,000.00	1,000.000000	4.683333	30.836314	35.519648	969.163686
1-X	04/01/07	04/30/07	A-30/360	45670CAB3	93,259,000.00	1,000.000000	1.237045	0.000000	1.237045	969.163686
2-A-1	04/01/07	04/30/07	A-30/360	45670CAC1	334,527,000.00	1,000.000000	4.849988	4.098186	8.948175	995.901814
2-X	04/01/07	04/30/07	A-30/360	45670CAD9	334,527,000.00	1,000.000000	0.208333	0.000000	0.208333	995.901814
A-R	04/01/07	04/30/07	A-30/360	45670CAF4	100.00	1,000.000000	5.200000	1,000.000000	1,005.200000	0.000000
B-1	04/01/07	04/30/07	A-30/360	45670CAH0	13,338,000.00	1,000.000000	5.037905	0.084963	5.122868	999.915037
B-2	04/01/07	04/30/07	A-30/360	45670CAJ6	10,258,000.00	1,000.000000	5.037905	0.084963	5.122868	999.915037
B-3	04/01/07	04/30/07	A-30/360	45670CAK3	7,181,000.00	1,000.000000	5.246239	0.084963	5.331202	999.915037
B-4	04/01/07	04/30/07	A-30/360	45670CAP2	5,130,000.00	1,000.000000	5.246238	0.084963	5.331201	999.915037
B-5	04/01/07	04/30/07	A-30/360	45670CAQ0	3,847,000.00	1,000.000000	5.246239	0.084962	5.331201	999.915038
B-6	04/01/07	04/30/07	A-30/360	45670CAR8	2,820,988.00	1,000.000000	5.246240	0.084963	5.331203	999.915037
B-IO	04/01/07	04/30/07	F-30/360	45670CAG2	23,596,000.00	1,000.000000	0.208333	0.000000	0.208333	999.915037
C-M	04/01/07	04/30/07	A-30/360	45670CAE7	42,575,000.00	1,000.000000	5.246243	9.926878	15.173121	990.073122
P-1		45670CAL1	100.00	1,000.000000	0.000000	0.000000	0.000000	1,000.000000
P-2		45670CAM9	100.00	1,000.000000	0.000000	0.000000	0.000000	1,000.000000
L		45670CAN7	0.00	0.000000	0.000000	0.000000	0.000000	0.000000




Page 2 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


Distribution to Date - REMIC III
									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	93,259,000.00	436,762.98	2,848,944.62	26,819.23	2,875,763.85	3,312,526.83	0.00	0.00	90,383,236.15
1-X	0.00	115,365.60	0.00	0.00	0.00	115,365.60	0.00	0.00	0.00
2-A-1	334,527,000.00	1,622,451.99	1,358,168.54	12,785.45	1,370,953.99	2,993,405.98	0.00	0.00	333,156,046.01
2-X	0.00	69,693.13	0.00	0.00	0.00	69,693.13	0.00	0.00	0.00
A-R	100.00	0.52	99.07	0.93	100.00	100.52	0.00	0.00	0.00
B-1	13,338,000.00	67,195.58	1,122.67	10.57	1,133.24	68,328.82	0.00	0.00	13,336,866.76
B-2	10,258,000.00	51,678.83	863.42	8.13	871.55	52,550.38	0.00	0.00	10,257,128.45
B-3	7,181,000.00	37,673.24	604.43	5.69	610.12	38,283.36	0.00	0.00	7,180,389.88
B-4	5,130,000.00	26,913.20	431.80	4.06	435.86	27,349.06	0.00	0.00	5,129,564.14
B-5	3,847,000.00	20,182.28	323.80	3.05	326.85	20,509.13	0.00	0.00	3,846,673.15
B-6	2,820,988.00	14,799.58	237.44	2.24	239.68	15,039.26	0.00	0.00	2,820,748.32
B-IO	0.00	4,915.83	0.00	0.00	0.00	4,915.83	0.00	0.00	0.00
C-M	42,575,000.00	223,358.79	418,695.36	3,941.49	422,636.85	645,995.64	0.00	0.00	42,152,363.15
P-1	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	100.00
P-2	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	100.00
L	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00


Total	512,936,288.00	2,690,991.55	4,629,491.15	43,580.84	4,673,071.99	7,364,063.54	0.00	0.00	508,263,216.01


Interest Detail - REMIC III
	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	5.62000%	93,259,000.00	436,762.98	0.00	0.00	0.00	436,762.98	436,762.98	0.00
1-X	1.48445%	93,259,000.00	115,365.60	0.00	0.00	0.00	115,365.60	115,365.60	0.00
2-A-1	5.81999%	334,527,000.00	1,622,451.99	0.00	0.00	0.00	1,622,451.99	1,622,451.99	0.00
2-X	0.25000%	334,527,000.00	69,693.13	0.00	0.00	0.00	69,693.13	69,693.13	0.00
A-R	6.24000%	100.00	0.51	0.00	0.00	0.00	0.51	0.52	0.00
B-1	6.04549%	13,338,000.00	67,195.58	0.00	0.00	0.00	67,195.58	67,195.58	0.00
B-2	6.04549%	10,258,000.00	51,678.83	0.00	0.00	0.00	51,678.83	51,678.83	0.00
B-3	6.29549%	7,181,000.00	37,673.24	0.00	0.00	0.00	37,673.24	37,673.24	0.00
B-4	6.29549%	5,130,000.00	26,913.20	0.00	0.00	0.00	26,913.20	26,913.20	0.00
B-5	6.29549%	3,847,000.00	20,182.28	0.00	0.00	0.00	20,182.28	20,182.28	0.00
B-6	6.29549%	2,820,988.00	14,799.58	0.00	0.00	0.00	14,799.58	14,799.58	0.00
B-IO	0.25000%	23,596,000.00	4,915.83	0.00	0.00	0.00	4,915.83	4,915.83	0.00
C-M	6.29549%	42,575,000.00	223,358.79	0.00	0.00	0.00	223,358.79	223,358.79	0.00
P-1	0.00000%	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
P-2	0.00000%	100.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00
L	0.00000%	0.00	0.00	0.00	0.00	0.00	0.00	0.00	0.00


Total		964,318,288.00	2,690,991.54	0.00	0.00	0.00	2,690,991.54	2,690,991.55	0.00



Page 3 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Collection Account Report
SUMMARY

	Group 2	Group 1	Total
Principal Collections	1,510,182.04	3,162,889.96	4,673,072.00
Principal Withdrawals	0.00	0.00	0.00
Principal Other Accounts	0.00	0.00	0.00
TOTAL NET PRINCIPAL	1,510,182.04	3,162,889.96	4,673,072.00
Interest Collections	2,057,999.39	668,417.21	2,726,416.60
Interest Withdrawals	-0.00	-0.00	-0.00
Interest Other Accounts	0.00	0.00	0.00
Interest Fees	-29,029.24	-6,395.81	-35,425.06
TOTAL NET INTEREST	2,028,970.15	662,021.40	2,690,991.54
TOTAL AVAILABLE FUNDS FOR DISTRIBUTION	3,539,152.19	3,824,911.36	7,364,063.54




PRINCIPAL - COLLECTIONS

	Group 2	Group 1	Total
Scheduled Principal Received	32,324.12	11,256.71	43,580.83
Curtailments	24,888.87	6,484.36	31,373.23
Prepayments In Full	1,452,969.05	3,145,148.89	4,598,117.94
Repurchased/Substitutions	0.00	0.00	0.00
Liquidations	0.00	0.00	0.00
Insurance Principal	0.00	0.00	0.00
Other Additional Principal	0.00	0.00	0.00
Delinquent Principal	-26,247.28	-9,103.71	-35,350.99
Realized Losses	-0.00	-0.00	-0.00
Advanced Principal	26,247.28	9,103.71	35,350.99
TOTAL PRINCIPAL COLLECTED	1,510,182.04	3,162,889.96	4,673,072.00




PRINCIPAL - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK




PRINCIPAL - OTHER ACCOUNTS

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






Page 4 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


INTEREST - COLLECTIONS

	Group 2	Group 1	Total
Scheduled Interest	2,156,491.39	697,571.09	2,854,062.48
Repurchased/Substitution Interest	0.00	0.00	0.00
Liquidation Interest	0.00	0.00	0.00
Insurance Interest	0.00	0.00	0.00
Other Additional Interest	0.00	0.00	0.00
Prepayment Interest Shortfalls	-1,047.22	-0.00	-1,047.22
Delinquent Interest	-1,697,218.45	-581,241.24	-2,278,459.69
Compensating Interest	1,047.22	0.00	1,047.22
Civil Relief Act Shortfalls	-0.00	-0.00	-0.00
Interest Advanced	1,598,726.45	552,087.36	2,150,813.81
Interest Realized Loss	-0.00	-0.00	-0.00
TOTAL INTEREST COLLECTED	2,057,999.39	668,417.21	2,726,416.60




INTEREST - WITHDRAWALS

SPACE INTENTIONALLY LEFT BLANK




INTEREST - OTHER ACCOUNTS
INTEREST - OTHER ACCOUNTS
	Group 2	Group 1	Total
Hard Prepayment Charges Collected. *
Hard Prepayment Charges Waived. *
Hard Prepayment Charges paid by the servicer.	0.00	0.00	0.00

Soft Prepayment Charges Collected. *
Soft Prepayment Charges Waived. *
Soft Prepayment Charges paid by the servicer.	0.00	0.00	0.00

Late Payment Fee waived. *
Late Payment Fee collected. *
Late Payment Fee paid by the servicer	0.00	0.00	0.00


TOTAL INTEREST OTHER ACCOUNTS	0.00	0.00	0.00





Page 5 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


INTEREST FEES
INTEREST FEES
	Group 2	Group 1	Total
Current Servicing Fees	26,856.53	5,790.12	32,646.65
Trustee Fees	2,172.71	605.70	2,778.40
TOTAL INTEREST FEES	29,029.24	6,395.81	35,425.06



Page 6 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7

Mortgage Pass-Through Certificates

May 25, 2007 Distribution

Credit Enhancement Report

ACCOUNTS

Distribution Account

Beginning Account Balance

0.00

Account Deposit

7,364,063.54

Account Withdrawal

7,364,063.54

Ending Account Balance

0.00

INSURANCE

SPACE INTENTIONALLY LEFT BLANK

STRUCTURAL FEATURES

SPACE INTENTIONALLY LEFT BLANK

Page 7 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Collateral Report


COLLATERAL




		Group 2	Group 1	Total



Loan Count:


Original	819	270	1,089
Prior	819	270	1,089
Prefunding	0	0	0
Scheduled Paid Offs	-0	-0	-0
Full Voluntary Prepayments	-4	-4	-8
Repurchases	-0	-0	-0
Liquidations	-0	-0	-0
Current	815	266	1,081
Principal Balance:


Original	401,115,301.21	111,820,787.54	512,936,088.75
Prior	401,115,301.21	111,820,787.54	512,936,088.75
Prefunding	0.00	0.00	0.00
Scheduled Principal	-32,324.12	-11,256.71	-43,580.83
Partial Prepayments	-24,888.87	-6,484.36	-31,373.23
Full Voluntary Prepayments	-1,452,969.05	-3,145,148.89	-4,598,117.94
Repurchases	-0.00	-0.00	-0.00
Liquidations	-0.00	-0.00	-0.00
Current	399,605,119.17	108,657,897.58	508,263,016.75





PREFUNDING

SPACE INTENTIONALLY LEFT BLANK

Page 8 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


CHARACTERISTICS
CHARACTERISTICS

	Group 2	Group 1	Total
Weighted Average Coupon Original	6.45149%	7.48595%	6.67700%
Weighted Average Coupon Prior	6.45149%	7.48595%	6.67700%
Weighted Average Coupon Current	6.45149%	7.48595%	6.67700%
Weighted Average Months to Maturity Original	358	357	358
Weighted Average Months to Maturity Prior	358	357	358
Weighted Average Months to Maturity Current	358	357	358
Weighted Avg Remaining Amortization Term Original	361	364	362
Weighted Avg Remaining Amortization Term Prior	361	364	362
Weighted Avg Remaining Amortization Term Current	361	364	362
Weighted Average Seasoning Original	1.69	2.52	1.87
Weighted Average Seasoning Prior	1.69	2.52	1.87
Weighted Average Seasoning Current	1.69	2.52	1.87

Page 9 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


ARM CHARACTERISTICS
ARM CHARACTERISTICS

	Group 2	Group 1	Total
Weighted Average Margin Original	2.68578%	2.63546%	2.67481%
Weighted Average Margin Prior	2.68578%	2.63546%	2.67481%
Weighted Average Margin Current	2.68578%	2.63546%	2.67481%
Weighted Average Max Rate Original	11.61434%	12.87263%	11.88865%
Weighted Average Max Rate Prior	11.61434%	12.87263%	11.88865%
Weighted Average Max Rate Current	11.61434%	12.87263%	11.88865%
Weighted Average Min Rate Original	4.98462%	4.73350%	4.92987%
Weighted Average Min Rate Prior	4.98462%	4.73350%	4.92987%
Weighted Average Min Rate Current	4.98462%	4.73350%	4.92987%
Weighted Average Cap Up Original	1.89447%	1.68296%	1.84836%
Weighted Average Cap Up Prior	1.89447%	1.68296%	1.84836%
Weighted Average Cap Up Current	1.89447%	1.68296%	1.84836%
Weighted Average Cap Down Original	1.89447%	1.68296%	1.84836%
Weighted Average Cap Down Prior	1.89447%	1.68296%	1.84836%
Weighted Average Cap Down Current	1.89447%	1.68296%	1.84836%





Page 10 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


SERVICING FEES & ADVANCES
SERVICING FEES & ADVANCES

	Group 2	Group 1	Total




Current Servicing Fees	26,856.53	5,790.12	32,646.65
Delinquent Servicing Fees	98,492.00	29,153.88	127,645.88
TOTAL SERVICING FEES	125,348.53	34,944.00	160,292.53


Total Servicing Fees	125,348.53	34,944.00	160,292.53
Compensating Interest	-1,047.22	-0.00	-1,047.22
Delinquent Servicing Fees	-98,492.00	-29,153.88	-127,645.88
COLLECTED SERVICING FEES	25,809.32	5,790.12	31,599.43


Total Advanced Interest	1,598,726.45	552,087.36	2,150,813.81
Total Advanced Principal	26,247.28	9,103.71	35,350.99
Aggregate Advances with respect to this Distribution	1,624,973.73	561,191.07	2,186,164.79


Any additional servicing compensation received by the
Servicer attributable to penalties, fees, Excess Proceeds
or other similar charges or fees and items. *


The aggregate amount of Advances reimbursed
during the related Due Period. *
The general source of funds for such reimbursements. *
The aggregate amount of Advances outstanding as
of the close of business on the Distribution Date. *


The aggregate amount of Servicing Advances
reimbursed during the related Due Period. *
The general source of funds for such reimbursements. *
The aggregate amount of Servicing Advances outstanding
as of the close of business on the Distribution Date. *



* Information not available with Trustee




ADDITIONAL COLLATERAL INFORMATION
ADDITIONAL COLLATERAL INFORMATION
	Group 2	Group 1	Total
Prepayment Interest Shortfall (PPIS)	1,047.22	0.00	1,047.22
Compensating Interest	(1,047.22)	0.00	(1,047.22)
Net Prepayment Interest Shortfall (PPIS)	0.00	0.00	0.00

Weighted Average Net Mortgage Rate	6.069986%	7.104454%	6.295501%

The number and aggregate balance of any
Delayed Delivery Mortgage Loans not delivered
within the time periods specified in the
definition of Delayed Delivery Mortgage Loans. *

* Information not available with Trustee




Page 11 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Delinquency Report

TOTAL
		< 1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT	Balance		7,067,824.82	515,200.00	0.00	7,583,024.82
	% Balance		1.39%	0.10%	0.00%	1.49%
	# Loans		20	1	0	21
	% # Loans		1.85%	0.09%	0.00%	1.94%
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	7,067,824.82	515,200.00	0.00	7,583,024.82
	% Balance	0.00%	1.39%	0.10%	0.00%	1.49%
	# Loans	0	20	1	0	21
	% # Loans	0.00%	1.85%	0.09%	0.00%	1.94%

Page 12 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


GROUP 1
		< 1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT	Balance		4,834,844.88	515,200.00	0.00	5,350,044.88
	% Balance		4.45%	0.47%	0.00%	4.92%
	# Loans		14	1	0	15
	% # Loans		5.26%	0.38%	0.00%	5.64%
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	4,834,844.88	515,200.00	0.00	5,350,044.88
	% Balance	0.00%	4.45%	0.47%	0.00%	4.92%
	# Loans	0	14	1	0	15
	% # Loans	0.00%	5.26%	0.38%	0.00%	5.64%

Page 13 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


GROUP 2
		< 1 PAYMENT	1 PAYMENT	2 PAYMENTS	3+ PAYMENTS	TOTAL
DELINQUENT	Balance		2,232,979.94	0.00	0.00	2,232,979.94
	% Balance		0.56%	0.00%	0.00%	0.56%
	# Loans		6	0	0	6
	% # Loans		0.74%	0.00%	0.00%	0.74%
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	2,232,979.94	0.00	0.00	2,232,979.94
	% Balance	0.00%	0.56%	0.00%	0.00%	0.56%
	# Loans	0	6	0	0	6
	% # Loans	0.00%	0.74%	0.00%	0.00%	0.74%

Page 14 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7

Mortgage Pass-Through Certificates

May 25, 2007 Distribution

REO Report

Loan Number

Original

Stated

Current

State &

First

Principal

Paid to

Note

LTV at

Original

Payment

Loan Group

Balance

Date

Rate

Origination

Term

Date

Page 15 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7

Mortgage Pass-Through Certificates

May 25, 2007 Distribution

Foreclosure Report

Loan Number

Original

Stated

Current

State &

First

Principal

Paid to

Note

LTV at

Original

Payment

Loan Group

Balance

Date

Rate

Origination

Term

Date

Page 16 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Prepayment Report

VOLUNTARY PREPAYMENTS



		Group 2	Group 1	Total


Current


Number of Paid in Full Loans	4	4	8
Number of Repurchased Loans	0	0	0
Total Number of Loans Prepaid in Full	4	4	8
Curtailments Amount	24,888.87	6,484.36	31,373.23
Paid in Full Balance	1,452,969.05	3,145,148.89	4,598,117.94
Repurchased Loans Balance	0.00	0.00	0.00
Total Prepayment Amount	1,477,857.92	3,151,633.25	4,629,491.17
Cumulative


Number of Paid in Full Loans	4	4	8
Number of Repurchased Loans	0	0	0
Total Number of Loans Prepaid in Full	4	4	8
Paid in Full Balance	1,452,969.05	3,145,148.89	4,598,117.94
Repurchased Loans Balance	0.00	0.00	0.00
Curtailments Amount	24,888.87	6,484.36	31,373.23
Total Prepayment Amount	1,477,857.92	3,151,633.25	4,629,491.17

Page 17 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


VOLUNTARY PREPAYMENTS RATES - Including Liquidated Balances



		Group 2	Group 1	Total





SMM	0.37%	2.82%	0.90%
3 Months Avg SMM	0.37%	2.82%	0.90%
12 Months Avg SMM	0.37%	2.82%	0.90%
Avg SMM Since Cut-off	0.37%	2.82%	0.90%



CPR	4.33%	29.04%	10.31%
3 Months Avg CPR	4.33%	29.04%	10.31%
12 Months Avg CPR	4.33%	29.04%	10.31%
Avg CPR Since Cut-off	4.33%	29.04%	10.31%



PSA	1,282.97%	5,769.27%	2,762.80%
3 Months Avg PSA Approximation	1,282.98%	5,769.27%	2,762.79%
12 Months Avg PSA Approximation	1,282.98%	5,769.27%	2,762.79%
Avg PSA Since Cut-off Approximation	1,282.98%	5,769.27%	2,762.79%


(*) SMM, CPR, PSA Figures Include Liquidated Balances

Page 18 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7

Mortgage Pass-Through Certificates

May 25, 2007 Distribution

PREPAYMENT CALCULATION METHODOLOGY - Including Liquidated Balances

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases + Liquidated Balances)/(Beg Principal Balance - Sched Principal)

Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)

PSA Standard Prepayment Model: CPR/(0.20%*min(30,WAS))

Average SMM over period between nth month and mth month (AvgSMMn,m): 1 - [(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/(0.20%*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 and repurchases.

Dates correspond to distribution dates.

Page 19 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


VOLUNTARY PREPAYMENTS RATES - Excluding Liquidated Balances



		Group 2	Group 1	Total





SMM	0.37%	2.82%	0.90%
3 Months Avg SMM	0.37%	2.82%	0.90%
12 Months Avg SMM	0.37%	2.82%	0.90%
Avg SMM Since Cut-off	0.37%	2.82%	0.90%



CPR	4.33%	29.04%	10.31%
3 Months Avg CPR	4.33%	29.04%	10.31%
12 Months Avg CPR	4.33%	29.04%	10.31%
Avg CPR Since Cut-off	4.33%	29.04%	10.31%



PSA	1,282.97%	5,769.27%	2,762.80%
3 Months Avg PSA Approximation	1,282.98%	5,769.27%	2,762.79%
12 Months Avg PSA Approximation	1,282.98%	5,769.27%	2,762.79%
Avg PSA Since Cut-off Approximation	1,282.98%	5,769.27%	2,762.79%

(*) SMM, CPR, PSA Figures Exclude Liquidated Balances
(*) SMM, CPR, PSA Figures Exclude Liquidated Balances

Page 20 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7

Mortgage Pass-Through Certificates

May 25, 2007 Distribution

PREPAYMENT CALCULATION METHODOLOGY - Excluding Liquidated Balances

Single Monthly Mortality (SMM): (Voluntary partial and full prepayments + Repurchases)/(Beg Principal Balance - Sched Principal)

Conditional Prepayment Rate (CPR): 1-((1-SMM)^12)

PSA Standard Prepayment Model: CPR/(0.20%*min(30,WAS))

Average SMM over period between nth month and mth month (AvgSMMn,m): 1 - [(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/(0.20%*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 and repurchases.

Dates correspond to distribution dates.

Page 21 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7

Mortgage Pass-Through Certificates

May 25, 2007 Distribution

Prepayment Detail Report

Prepayment Detail Report - Mortgage Loans Prepaid in Full During Current Distribution

Loan Number

Original

Current

State &

Type Prepayment

First

Loan

Principal

Prepayment

Note

LTV at

Payment

Loan Group

Status

Balance

Amount

Date

Rate

Origination

Original Term

Date

6102990 2

500,000.00

499,971.13

30-Apr-2007

6.875%

AZ - 78.74%

Paid Off - 360

01-Feb-2007

6105651 1

230,000.00

229,648.89

08-May-2007

7.375%

NC - 66.66%

Paid Off - 360

01-Mar-2007

6105682 2

203,000.00

01-May-2007

7.000%

SC - 78.07%

Paid Off - 360

01-Feb-2007

6105787 1

1,920,000.00

04-May-2007

7.250%

CO - 49.23%

Paid Off - 360

01-Apr-2007

6113349 2

400,000.00

18-Apr-2007

7.000%

CA - 80.00%

Paid Off - 360

01-Mar-2007

125308441 1

563,500.00

15-May-2007

7.500%

MD - 80.00%

Paid Off - 360

01-Apr-2007

125479762 1

432,000.00

03-May-2007

7.125%

CA - 80.00%

Paid Off - 360

01-Mar-2007

125790182 2

350,000.00

349,997.92

08-May-2007

6.250%

CA - 75.27%

Paid Off - 360

01-Apr-2007

TOTAL

4,598,500.00

4,598,117.94

Page 22 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Realized Loss Report

COLLATERAL REALIZED LOSSES


		Group 2	Group 1	Total


Current





	Number of Loans Liquidated		0	0	0

	Collateral Principal Realized Loss/(Gain) Amount		0.00	0.00	0.00
	Collateral Interest Realized Loss/(Gain) Amount		0.00	0.00	0.00
Net Liquidation Proceeds		0.00	0.00	0.00

Cumulative




	Number of Loans Liquidated		0	0	0

	Collateral Realized Loss/(Gain) Amount		0.00	0.00	0.00
Net Liquidation Proceeds		0.00	0.00	0.00



	Special Hazard Loss Coverage Amt				5,129,361.00
	Fraud Loss Coverage Amt				15,388,083.00
	Bankruptcy Loss Coverage Amt				225,847.00

Page 23 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution


DEFAULT SPEEDS
DEFAULT SPEEDS
	Group 2	Group 1	Total




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


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


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


Principal Only Loss Severity Approx for Current Period	0.00%	0.00%	0.00%
3 Months Avg Loss Severity Approximation	0.00%	0.00%	0.00%
12 Months Avg Loss Severity Approximation	0.00%	0.00%	0.00%
Avg Loss Severity Approximation Since Cut-Off	0.00%	0.00%	0.00%


Principal & Interest Loss Severity Approx for Current Period	0.00%	0.00%	0.00%
3 Months Avg Loss Severity Approximation	0.00%	0.00%	0.00%
12 Months Avg Loss Severity Approximation	0.00%	0.00%	0.00%
Avg Loss Severity Approximation Since Cut-Off	0.00%	0.00%	0.00%

Page 24 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7

Mortgage Pass-Through Certificates

May 25, 2007 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)

Principal Only Loss Severity Approximation for current period:

Sum(Principal Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

Principal & Interest Loss Severity Approximation for current period:

Sum(Principal & Interest Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans)

Average Loss Severity Approximation over period between nth month and mth month:

Sum(Realized Loss Amount)/sum(Beg Principal Balance of Liquidated Loans for months in the period n,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.

All Realized Losses in excess of Principal Balance are treated as Interest Realized Losses.

Page 25 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7

Mortgage Pass-Through Certificates

May 25, 2007 Distribution

Realized Loss Detail Report

Loan Number

Current

State &

Prior

Realized

Cumulative

Loan

Note

LTV at

Original

Principal

Loss/(Gain)

Realized

Loan Group

Status

Rate

Origination

Term

Balance

Revision

Loss/(Gain)

TOTAL

Page 26 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7

Mortgage Pass-Through Certificates

May 25, 2007 Distribution

Triggers and Adj. Cert. Report

TRIGGER EVENTS

Group 2

Group 1

Total

Has Optional Termination Date Reached

Has Sr. Prepay Stepdown Condition Occurred

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

ADJUSTABLE RATE CERTIFICATE INFORMATION

SPACE INTENTIONALLY LEFT BLANK

ADDITIONAL INFORMATION

Group 2

Group 1

Total

Senior Percentage

91.699593%

91.700302%

Subordinate Percentage

8.300407%

8.299698%

Senior Prepayment Percentage

100.000000%

Subordinate Prepayment Percentage

0.000000%

Subordinate Pass Through Rate

6.295486%

Current LIBOR Rate

5.320000%

Libor Rate Determination Date

04/23/2007

Next LIBOR Rate

5.320000%

Next Libor Determination Date

05/23/2007

Page 27 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Additional Certificate Report

ADDITIONAL CERTIFICATE REPORT

		Next Pass Through Rate


CLASS
	1-A-1	5.620%
	1-X	0.000%
	2-A-1	0.000%
	2-X	0.000%
	A-R	0.000%
	B-1	0.000%
	B-2	0.000%
	B-3	0.000%
	B-4	0.000%
	B-5	0.000%
	B-6	0.000%
	B-IO	0.000%
	C-M	0.000%
	C-M-1	0.000%
	C-M-2	0.000%
	P-1	0.000%
	P-2	0.000%
	L	0.000%
	REMIC1	0.000%
	REMIC2	0.000%




Page 28 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7



Mortgage Pass-Through Certificates
Mortgage Pass-Through Certificates
May 25, 2007 Distribution

Other Related Information
ADDITIONAL INFORMATION
ADDITIONAL INFORMATION
	Group 2	Group 1	Total
Current Scheduled Payments	2,188,815.51	708,827.80	2,897,643.31
Current Scheduled Payments 1 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 2 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 3 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 4 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 5 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 6 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 7 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 8 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 9 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 10 Month Prior	0.00	0.00	0.00
Current Scheduled Payments 11 Month Prior	0.00	0.00	0.00


Sched. Payments for 60+Day Delinquent Loans	0.00	3,059.00	3,059.00
Sched. Pmts - 60+Day Delinquent Loans, 1 Month Prior	0.00	0.00	0.00
Sched. Pmts - 60+Day Delinquent Loans, 2 Month Prior	0.00	0.00	0.00
Sched. Pmts - 60+Day Delinquent Loans, 3 Month Prior	0.00	0.00	0.00
Sched. Pmts - 60+Day Delinquent Loans, 4 Month Prior	0.00	0.00	0.00
Sched. Pmts - 60+Day Delinquent Loans, 5 Month Prior	0.00	0.00	0.00
Sched. Pmts - 60+Day Delinquent Loans, 6 Month Prior	0.00	0.00	0.00
Sched. Pmts - 60+Day Delinquent Loans, 7 Month Prior	0.00	0.00	0.00
Sched. Pmts - 60+Day Delinquent Loans, 8 Month Prior	0.00	0.00	0.00
Sched. Pmts - 60+Day Delinquent Loans, 9 Month Prior	0.00	0.00	0.00
Sched. Pmts - 60+Day Delinquent Loans, 10 Month Prior	0.00	0.00	0.00
Sched. Pmts - 60+Day Delinquent Loans, 11 Month Prior	0.00	0.00	0.00



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			0.00





Page 29 of 29

IndyMac INDX Mortgage Loan Trust 2007-AR7 10-D