Document and Entity Information (USD $)	12 Months Ended
	Mar. 30, 2012	Jun. 26, 2012
Document and Entity Information
Entity Registrant Name	AMERICAN TAX CREDIT TRUST SERIES I
Document Type	10-K
Document Period End Date	Mar. 30, 2012
Amendment Flag	false
Entity Central Index Key	0000897315
Current Fiscal Year End Date	--03-30
Entity Common Stock, Shares Outstanding		18,654
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Document Fiscal Year Focus	2012
Document Fiscal Period Focus	FY
Entity Public Float	$ 0