INVESTMENTS IN OPERATING PARTNERSHIPS (Tables)

3 Months Ended

Jun. 30, 2012

Equity Method Investments and Joint Ventures [Abstract]

Schedule Of Number Of Operating Partnerships [Table Text Block]

The breakdown of Operating Partnerships within the Fund at June 30, 2012 and 2011 are as follows:

	2012	2011
Series 20	12	16
Series 21	6	9
Series 22	20	22
Series 23	15	16
Series 24	16	20
Series 25	11	14
Series 26	39	40
Series 27	15	15
Series 28	24	26
Series 29	21	21
Series 30	17	17
Series 31	26	26
Series 32	15	15
Series 33	8	9
Series 34	14	14
Series 35	11	11
Series 36	11	11
Series 37	7	7
Series 38	10	10
Series 39	9	9
Series 40	16	16
Series 41	20	20
Series 42	21	22
Series 43	23	23
Series 44	10	10
Series 45	30	30
Series 46	15	15
	442	464

Schedule Of Contributions Payable [Table Text Block]

The contributions payable at June 30, 2012 and 2011, are as follows:

	2012	2011
Series 22	$   9,352	$   9,352
Series 24	9,999	9,999
Series 25	-	10,001
Series 26	14,490	14,490
Series 27	10,020	10,020
Series 28	40,968	40,968
Series 29	10,197	10,197
Series 30	127,396	127,396
Series 31	66,294	66,294
Series 32	173,561	173,561
Series 33	69,154	69,154
Series 37	138,438	138,438
Series 40	102	102
Series 41	100	100
Series 42	73,433	73,433
Series 43	121,112	121,112
Series 44	254,640	254,640
Series 45	16,724	16,724
	$1,135,980	$1,145,981

Schedule Of Dispositions By Series [Table Text Block]

A summary of the dispositions by Series for June 30, 2012 is as follows:

	Operating Partnership Interest Transferred	Sale of Underlying Operating Partnership	Partnership Proceeds from Disposition		Gain/(Loss) on Disposition
Series 24	2	-		27,680		27,680
Series 25	-	-		48,325		48,325
Series 26	-	-		538,243		538,243
Series 27	-	-		575,945		575,945
Series 30	-	-		72,943		72,943
Series 42	1	-		-		-
Total	3	-	$	1,263,136	$	1,263,136

During the three months ended June 30, 2011 the Fund disposed of three Operating Partnerships. A summary of the dispositions by Series for June 30, 2011 is as follows:

	Operating Partnership Interest Transferred	Sale of Underlying Operating Partnership	Partnership Proceeds from Disposition		Gain/(Loss) on Disposition
Series 20	1	-	$	55,000	$	55,000
Series 25	1	1		874,787		874,787
Total	2	1	$	929,787	$	929,787

Schedule Of Summarized Statement Of Operations In Operating Partnerships [Table Text Block]

The Fund's fiscal year ends March 31st for each year, while all the Operating Partnerships' fiscal years are the calendar year. Pursuant to the provisions of each Operating Partnership Agreement, financial results for each of the Operating Partnerships are provided to the Fund within 45 days after the close of each Operating Partnership's quarterly period. Accordingly, the current financial results available for the Operating Partnerships are for the three months ended March 31, 2012.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31, 
(Unaudited)

		2012	2011
Revenues
	Rental	$  35,357,571	$  37,763,975
	Interest and other	1,051,584	1,454,876
		36,409,155	39,218,851
Expenses
	Interest	7,297,759	8,102,888
	Depreciation and amortization	10,463,735	11,107,617
	Operating expenses	23,269,874	24,704,832
		41,031,368	43,915,337
NET INCOME (LOSS)		$ (4,622,213)	$ (4,696,486)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (4,575,990)	$ (4,649,519)
Net income (loss) allocated to other Partners		$    (46,223)	$    (46,967)

* Amounts include $(3,882,388) and $(3,451,824) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 20

		2012	2011
Revenues
	Rental	$  671,891	$ 1,483,471
	Interest and other	18,476	79,432
		690,367	1,562,903
Expenses
	Interest	105,536	269,238
	Depreciation and amortization	171,357	333,848
	Operating expenses	464,721	1,039,845
		741,614	1,642,931
NET INCOME (LOSS)		$  (51,247)	$  (80,028)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (50,735)	$  (79,228)
Net income (loss) allocated to other Partners		$     (512)	$     (800)

* Amounts include $(50,735) and $(79,228) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 21

		2012	2011
Revenues
	Rental	$   477,583	$   666,970
	Interest and other	8,792	49,695
		486,375	716,665
Expenses
	Interest	157,053	169,438
	Depreciation and amortization	96,439	140,769
	Operating expenses	301,588	400,547
		555,080	710,754
NET INCOME (LOSS)		$  (68,705)	$     5,911
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (68,018)	$     5,852
Net income (loss) allocated to other Partners		$     (687)	$        59

* Amounts include $(68,018) and $5,852 for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 22

		2012	2011
Revenues
	Rental	$   866,753	$ 1,200,166
	Interest and other	22,798	68,321
		889,551	1,268,487
Expenses
	Interest	132,424	205,651
	Depreciation and amortization	275,593	342,975
	Operating expenses	556,283	955,890
		964,300	1,504,516
NET INCOME (LOSS)		$  (74,749)	$ (236,029)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (74,002)	$ (233,669)
Net income (loss) allocated to other Partners		$     (747)	$   (2,360)

* Amounts include $(74,002) and $(233,669) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 23

		2012	2011
Revenues
	Rental	$   934,703	$ 1,178,054
	Interest and other	30,991	59,220
		965,694	1,237,274
Expenses
	Interest	146,930	227,009
	Depreciation and amortization	213,075	283,152
	Operating expenses	675,396	832,689
		1,035,401	1,342,850
NET INCOME (LOSS)		$  (69,707)	$ (105,576)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (69,009)	$ (104,519)
Net income (loss) allocated to other Partners		$     (698)	$   (1,057)

* Amounts include $(69,009) and $(104,519) for 2012 and 2011, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 24

		2012	2011
Revenues
	Rental	$   709,150	$ 1,298,083
	Interest and other	21,225	42,775
		730,375	1,340,858
Expenses
	Interest	112,882	266,673
	Depreciation and amortization	171,016	353,934
	Operating expenses	499,660	789,365
		783,558	1,409,972
NET INCOME (LOSS)		$  (53,183)	$  (69,114)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (52,651)	$  (68,423)
Net income (loss) allocated to other Partners		$     (532)	$     (691)

* Amounts include $(52,651) and $(68,423) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 25

		2012	2011
Revenues
	Rental	$   625,517	$ 1,386,748
	Interest and other	12,739	36,594
		638,256	1,423,342
Expenses
	Interest	108,342	261,625
	Depreciation and amortization	140,311	348,439
	Operating expenses	415,535	786,282
		664,188	1,396,346
NET INCOME (LOSS)		$  (25,932)	$    26,996
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (25,673)	$    26,726
Net income (loss) allocated to other Partners		$     (259)	$       270

* Amounts include $(25,673) and $26,726 for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 26

		2012	2011
Revenues
	Rental	$ 2,132,464	$ 2,074,879
	Interest and other	86,164	77,488
		2,218,628	2,152,367
Expenses
	Interest	378,191	394,578
	Depreciation and amortization	534,679	551,425
	Operating expenses	1,562,236	1,516,694
		2,475,106	2,462,697
NET INCOME (LOSS)		$ (256,478)	$ (310,330)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (253,913)	$ (307,227)
Net income (loss) allocated to other Partners		$   (2,565)	$   (3,103)

* Amounts include $(253,913) and $(307,227) for 2012 and 2011, respectively, of loss not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 27

		2012	2011
Revenues
	Rental	$ 1,386,038	$ 1,367,636
	Interest and other	18,198	17,162
		1,404,236	1,384,798
Expenses
	Interest	326,859	336,597
	Depreciation and amortization	333,498	332,176
	Operating expenses	784,124	789,304
		1,444,481	1,458,077
NET INCOME (LOSS)		$  (40,245)	$  (73,279)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (39,843)	$  (72,546)
Net income (loss) allocated to other Partners		$     (402)	$     (733)

* Amounts include $(40,245) and $(72,546) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 28

		2012	2011
Revenues
	Rental	$  1,840,175	$  1,857,418
	Interest and other	40,229	34,932
		1,880,404	1,892,350
Expenses
	Interest	325,514	372,118
	Depreciation and amortization	501,463	522,723
	Operating expenses	1,219,404	1,203,819
		2,046,381	2,098,660
NET INCOME (LOSS)		$  (165,977)	$  (206,310)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (164,317)	$  (204,247)
Net income (loss) allocated to other Partners		$    (1,660)	$    (2,063)

* Amounts include $(164,317) and $(204,247) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 29

		2012	2011
Revenues
	Rental	$  1,884,898	$  1,900,691
	Interest and other	43,994	98,140
		1,928,892	1,998,831
Expenses
	Interest	340,998	355,237
	Depreciation and amortization	608,805	594,590
	Operating expenses	1,170,900	1,289,757
		2,120,703	2,239,584
NET INCOME (LOSS)		$  (191,811)	$  (240,753)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (189,893)	$  (238,345)
Net income (loss) allocated to other Partners		$    (1,918)	$    (2,408)

* Amounts include $(189,893) and $(238,345) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 30

		2012	2011
Revenues
	Rental	$ 1,215,485	$ 1,217,201
	Interest and other	18,196	20,204
		1,233,681	1,237,405
Expenses
	Interest	192,535	200,341
	Depreciation and amortization	253,602	297,689
	Operating expenses	977,077	919,408
		1,423,214	1,417,438
NET INCOME (LOSS)		$ (189,533)	$ (180,033)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (187,638)	$ (178,233)
Net income (loss) allocated to other Partners		$   (1,895)	$   (1,800)

* Amounts include $(187,638) and $(178,233) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 31

		2012	2011
Revenues
	Rental	$  2,695,740	$  2,662,643
	Interest and other	90,806	90,349
		2,786,546	2,752,992
Expenses
	Interest	477,701	448,884
	Depreciation and amortization	785,072	745,936
	Operating expenses	1,770,420	1,744,830
		3,033,193	2,939,650
NET INCOME (LOSS)		$  (246,647)	$  (186,658)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (244,181)	$  (184,791)
Net income (loss) allocated to other Partners		$    (2,466)	$    (1,867)

* Amounts include $(244,181) and $(184,791) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 32

		2012	2011
Revenues
	Rental	$  1,465,835	$  1,432,038
	Interest and other	47,751	77,903
		1,513,586	1,509,941
Expenses
	Interest	310,091	315,843
	Depreciation and amortization	516,648	547,892
	Operating expenses	985,303	929,441
		1,812,042	1,793,176
NET INCOME (LOSS)		$  (298,456)	$  (283,235)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (295,471)	$  (280,403)
Net income (loss) allocated to other Partners		$    (2,985)	$    (2,832)

* Amounts include $(295,471) and $(258,917) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 33

		2012	2011
Revenues
	Rental	$   672,850	$   724,053
	Interest and other	24,043	22,542
		696,893	746,595
Expenses
	Interest	171,320	186,311
	Depreciation and amortization	224,779	250,428
	Operating expenses	417,017	472,535
		813,116	909,274
NET INCOME (LOSS)		$ (116,223)	$ (162,679)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (115,061)	$ (161,052)
Net income (loss) allocated to other Partners		$   (1,162)	$   (1,627)

* Amounts include $(115,061) and $(161,052) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,

(Unaudited)

Series 34

		2012	2011
Revenues
	Rental	$ 1,529,406	$ 1,581,332
	Interest and other	49,985	73,976
		1,579,391	1,655,308
Expenses
	Interest	300,404	334,602
	Depreciation and amortization	578,645	621,318
	Operating expenses	1,098,933	1,105,243
		1,977,982	2,061,163
NET INCOME (LOSS)		$ (398,591)	$ (405,855)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (394,605)	$ (401,796)
Net income (loss) allocated to other Partners		$   (3,986)	$   (4,059)

* Amounts include $(394,605) and $(401,796) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,

(Unaudited)

Series 35

		2012	2011
Revenues
	Rental	$ 1,227,675	$ 1,176,983
	Interest and other	37,865	47,514
		1,265,540	1,224,497
Expenses
	Interest	258,974	248,268
	Depreciation and amortization	416,954	420,462
	Operating expenses	805,320	817,875
		1,481,248	1,486,605
NET INCOME (LOSS)		$ (215,708)	$ (262,108)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (213,551)	$ (259,487)
Net income (loss) allocated to other Partners		$   (2,157)	$   (2,621)

* Amounts include $(213,551) and $(196,672) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31, 
(Unaudited)

Series 36

		2012	2011
Revenues
	Rental	$   898,899	$   865,956
	Interest and other	17,038	19,916
		915,937	885,872
Expenses
	Interest	216,108	179,310
	Depreciation and amortization	235,574	241,543
	Operating expenses	547,895	514,370
		999,577	935,223
NET INCOME (LOSS)		$  (83,640)	$  (49,351)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (82,804)	$  (48,857)
Net income (loss) allocated to other Partners		$     (836)	$     (494)

* Amounts include $(82,804) and $(27,686) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31, 
(Unaudited)

Series 37

		2012	2011
Revenues
	Rental	$ 1,075,612	$ 1,139,453
	Interest and other	25,048	34,176
		1,100,660	1,173,629
Expenses
	Interest	190,142	166,811
	Depreciation and amortization	398,952	399,077
	Operating expenses	879,734	804,454
		1,468,828	1,370,342
NET INCOME (LOSS)		$ (368,168)	$ (196,713)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (364,486)	$ (194,746)
Net income (loss) allocated to other Partners		$   (3,682)	$   (1,967)

* Amounts include $(364,486) and $(244,042) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31, 
(Unaudited)

Series 38

		2012	2011
Revenues
	Rental	$   884,576	$   858,183
	Interest and other	28,785	35,095
		913,361	893,278
Expenses
	Interest	194,411	193,424
	Depreciation and amortization	258,984	269,432
	Operating expenses	551,258	553,150
		1,004,653	1,016,006
NET INCOME (LOSS)		$  (91,292)	$ (122,728)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (90,379)	$ (121,501)
Net income (loss) allocated to other Partners		$     (913)	$   (1,227)

* Amounts include $(65,606) and $(59,295) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31, 
(Unaudited)

Series 39

		2012	2011
Revenues
	Rental	$   623,814	$   629,600
	Interest and other	34,892	35,167
		658,706	664,767
Expenses
	Interest	126,343	128,193
	Depreciation and amortization	237,028	229,619
	Operating expenses	479,214	478,734
		842,585	836,546
NET INCOME (LOSS)		$ (183,879)	$ (171,779)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (182,040)	$ (170,061)
Net income (loss) allocated to other Partners		$   (1,839)	$   (1,718)

* Amounts include $(129,472) and $(118,372) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31, 
(Unaudited)

Series 40

		2012	2011
Revenues
	Rental	$ 1,223,024	$ 1,032,980
	Interest and other	26,656	32,591
		1,249,680	1,065,571
Expenses
	Interest	236,331	230,528
	Depreciation and amortization	335,702	328,104
	Operating expenses	807,429	655,670
		1,379,462	1,214,302
NET INCOME (LOSS)		$ (129,782)	$ (148,731)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (128,484)	$ (147,244)
Net income (loss) allocated to other Partners		$   (1,298)	$   (1,487)

* Amounts include $(65,340) and $(19,652) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 41

		2012	2011
Revenues
	Rental	$ 1,387,523	$ 1,301,851
	Interest and other	36,868	43,348
		1,424,391	1,345,199
Expenses
	Interest	306,433	371,719
	Depreciation and amortization	554,592	372,880
	Operating expenses	768,661	765,852
		1,629,686	1,510,451
NET INCOME (LOSS)		$ (205,295)	$ (165,252)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (203,242)	$ (163,599)
Net income (loss) allocated to other Partners		$   (2,053)	$   (1,653)

* Amounts include $(98,904) and $(20,468) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 42

		2012	2011
Revenues
	Rental	$ 1,513,307	$ 1,516,622
	Interest and other	60,165	46,259
		1,573,472	1,562,881
Expenses
	Interest	335,210	363,196
	Depreciation and amortization	429,751	410,004
	Operating expenses	897,403	858,444
		1,662,364	1,631,644
NET INCOME (LOSS)		$  (88,892)	$  (68,763)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (88,003)	$  (68,075)
Net income (loss) allocated to other Partners		$     (889)	$     (688)

* Amounts include $(91,838) and $(82,585) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31, 
(Unaudited)

Series 43

		2012	2011
Revenues
	Rental	$ 1,822,149	$ 1,673,235
	Interest and other	48,761	57,851
		1,870,910	1,731,086
Expenses
	Interest	358,145	377,004
	Depreciation and amortization	571,057	516,388
	Operating expenses	1,088,352	1,059,501
		2,017,554	1,952,893
NET INCOME (LOSS)		$ (146,644)	$ (221,807)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$ (145,178)	$ (219,589)
Net income (loss) allocated to other Partners		$   (1,466)	$   (2,218)

* Amounts include $(106,146) and $(104,433) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31,
(Unaudited)

Series 44

		2012	2011
Revenues
	Rental	$  1,774,948	$ 1,859,559
	Interest and other	66,888	69,978
		1,841,836	1,929,537
Expenses
	Interest	615,518	566,005
	Depreciation and amortization	587,579	600,486
	Operating expenses	1,064,700	1,107,738
		2,267,797	2,274,229
NET INCOME (LOSS)		$  (425,961)	$ (344,692)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (421,701)	$ (341,245)
Net income (loss) allocated to other Partners		$    (4,260)	$   (3,447)

* Amounts include $(432,898) and $(103,930) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31, 
(Unaudited)

Series 45

		2012	2011
Revenues
	Rental	$  2,472,015	$  2,344,166
	Interest and other	86,233	131,082
		2,558,248	2,475,248
Expenses
	Interest	562,129	576,214
	Depreciation and amortization	700,739	717,340
	Operating expenses	1,590,259	1,429,495
		2,853,127	2,723,049
NET INCOME (LOSS)		$  (294,879)	$  (247,801)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.*		$  (291,930)	$  (245,323)
Net income (loss) allocated to other Partners		$    (2,949)	$    (2,478)

* Amounts include $(99,056) and $(14,274) for 2012 and 2011, respectively, of net income (loss) not recognized under the equity method of accounting.

The Fund accounts for its investments using the equity method of accounting. Under the equity method of accounting, the Fund adjusts its investment cost for its share of each Operating Partnership's results of operations and for any distributions received or accrued. However, the Fund recognizes individual operating losses only to the extent of capital contributions. Excess losses are suspended for use in future years to offset excess income.

COMBINED CONDENSED SUMMARIZED STATEMENTS OF OPERATIONS
Three Months Ended March 31, 
(Unaudited)

Series 46

		2012	2011
Revenues
	Rental	$ 1,345,541	$ 1,334,004
	Interest and other	47,998	53,166
		1,393,539	1,387,170
Expenses
	Interest	311,235	358,071
	Depreciation and amortization	331,841	334,988
	Operating expenses	891,052	883,900
		1,534,128	1,576,959
NET INCOME (LOSS)		$ (140,589)	$ (189,789)
Net income (loss) allocated to Boston Capital Tax Credit Fund IV L.P.		$ (139,182)	$ (187,891)
Net income (loss) allocated to other Partners		$   (1,407)	$   (1,898)