Cover	9 Months Ended
	Sep. 30, 2022
Cover [Abstract]
Entity Registrant Name	Terra Income Fund 6, LLC
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Entity Central Index Key	0001577134
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Period End Date	Sep. 30, 2022
Title of 12(b) Security	7.00% Notes due 2026
Trading Symbol	TFSA
Security Exchange Name	NYSE
Entity File Number	000-55429
Entity Tax Identification Number	92-0548263
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false
Entity Ex Transition Period	false
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	205 West 28th Street,
Entity Address, Address Line Two	12th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10001
City Area Code	212
Local Phone Number	753-5100
Entity Interactive Data Current	Yes