EXHIBIT 99.a

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Boston Capital Tax Credit Fund IV L.P. (the "Fund") on Form 10-Q for the period ended December 31, 2002 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, John P. Manning, Director, Principal and Principal Executive Officer of C&M Management Inc., certify, pursuant to 18 U.S.C. section 1350, as adopted pursuant to section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge, after due inquiry:

(1)	The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities and Exchange Act of 1934; and
(2)	The information contained in the Report fairly presents, in all material respects, the financial condition and result of operations of the Fund.

	Boston Capital Tax Credit Fund IV L.P.
		By:	Boston Capital Associates IV L.P.
			General Partner
		By:	BCA Associates Limited Partnership,
			General Partner
		By:	C&M Management Inc.,
			General Partner
Date:
February 19, 2003		By:	/s/ John P. Manning
			John P. Manning
			Director, President, Principal Executive Officer