Document and Entity Information - shares	9 Months Ended
	Dec. 30, 2016	Feb. 02, 2017
Document and Entity Information:
Entity Registrant Name	AMERICAN TAX CREDIT TRUST SERIES I
Document Type	10-Q
Document Period End Date	Dec. 30, 2016
Trading Symbol	atctix
Amendment Flag	false
Entity Central Index Key	0000897315
Current Fiscal Year End Date	--03-30
Entity Common Stock, Shares Outstanding		0
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	2017
Document Fiscal Period Focus	Q3