ORGANIZATION

6 Months Ended

Sep. 30, 2012

Organization, Consolidation and Presentation Of Financial Statements [Abstract]

Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]

NOTE A - ORGANIZATION

Boston Capital Tax Credit Fund IV L.P. (the "Fund") was organized under the laws of the State of Delaware as of October 5, 1993, for the purpose of acquiring, holding, and disposing of limited partnership interests in operating partnerships which will acquire, develop, rehabilitate, operate and own newly constructed, existing or rehabilitated low-income apartment complexes ("Operating Partnerships"). Effective as of June 1, 2001 there was a restructuring and, as a result, the Fund's general partner was reorganized as follows. The general partner of the Fund continues to be Boston Capital Associates IV L.P., a Delaware limited partnership. The general partner of the general partner of the Fund is BCA Associates Limited Partnership, a Massachusetts limited partnership, whose sole general partner is C&M Management, Inc., a Massachusetts corporation and whose limited partners are Herbert F. Collins and John P. Manning. Mr. Manning is the principal of Boston Capital Partners, Inc. The limited partner of the general partner of the Fund is Capital Investment Holdings, a general partnership whose partners are various officers and employees of Boston Capital Partners, Inc. and its affiliates. The assignor limited partner is BCTC IV Assignor Corp., a Delaware corporation which is now wholly-owned by John P. Manning.

Pursuant to the Securities Act of 1933, the Fund filed a Form S-11 Registration Statement with the Securities and Exchange Commission, effective December 16, 1993, which covered the offering (the "Public Offering") of the Fund's beneficial assignee certificates ("BACs") representing assignments of units of the beneficial interest of the limited partnership interest of the assignor limited partner. The Fund registered 30,000,000 BACs at $10 per BAC for sale to the public in one or more series. On April 18, 1996, an amendment to Form S-11 which registered an additional 10,000,000 BACs for sale to the public in one or more series became effective. On April 2, 1998, an amendment to Form S-11, which registered an additional 25,000,000 BACs for sale to the public in one or more series, became effective. On August 31, 1999, an amendment to Form S-11, which registered an additional 8,000,000 BACs for sale to the public in one or more series, became effective. On July 26, 2000, an amendment to Form S-11, which registered an additional 7,500,000 BACs for sale to the public in one or more series, became effective. On July 24, 2001, an amendment to Form S-11, which registered an additional 7,000,000 BACs for sale to the public in one or more series, became effective. On July 24, 2002, an amendment to Form S-11, which registered an additional 7,000,000 BACs for sale to the public, became effective. On July 1, 2003, an amendment to Form S-11, which registered an additional 7,000,000 BACs for sale to the public, became effective.

Below is a summary of the BACs sold and total equity raised, by series, as of the date of this filing:

Series	Closing Date	BACs Sold	Equity Raised
Series 20	June 24, 1994	3,866,700	$38,667,000
Series 21	December 31, 1994	1,892,700	$18,927,000
Series 22	December 28, 1994	2,564,400	$25,644,000
Series 23	June 23, 1995	3,336,727	$33,366,000
Series 24	September 22, 1995	2,169,878	$21,697,000
Series 25	December 29, 1995	3,026,109	$30,248,000
Series 26	June 25, 1996	3,995,900	$39,959,000
Series 27	September 17, 1996	2,460,700	$24,607,000
Series 28	January 29, 1997	4,000,738	$39,999,000

Series	Closing Date	BACs Sold	Equity Raised
Series 29	June 10, 1997	3,991,800	$39,918,000
Series 30	September 10, 1997	2,651,000	$26,490,750
Series 31	January 18, 1998	4,417,857	$44,057,750
Series 32	June 23, 1998	4,754,198	$47,431,000
Series 33	September 21, 1998	2,636,533	$26,362,000
Series 34	February 11, 1999	3,529,319	$35,273,000
Series 35	June 28, 1999	3,300,463	$33,004,630
Series 36	September 28, 1999	2,106,837	$21,068,375
Series 37	January 28, 2000	2,512,500	$25,125,000
Series 38	July 31, 2000	2,543,100	$25,431,000
Series 39	January 31, 2001	2,292,152	$22,921,000
Series 40	July 31, 2001	2,630,256	$26,269,256
Series 41	January 31, 2002	2,891,626	$28,916,260
Series 42	July 31, 2002	2,744,262	$27,442,620
Series 43	December 31, 2002	3,637,987	$36,379,870
Series 44	April 30, 2003	2,701,973	$27,019,730
Series 45	September 16, 2003	4,014,367	$40,143,670
Series 46	December 19, 2003	2,980,998	$29,809,980

The Fund concluded its public offering of BACs in the Fund on December 19, 2003.