What is the FHA self-sufficiency test, and will my triplex pass?
It is a check FHA runs on every three- or four-unit home, and you can estimate it before you offer. Market rent from all units, yours included, less at least 25 percent, must cover the full monthly payment. To pass, your triplex needs total market rent at least a third above that payment.
WHAT MOST PEOPLE ARE NEVER TOLD
The test never looks at you. Your income and credit do not enter it, so a strong income does not change the result. It compares the home's rent with the home's payment.
- The appraiser estimates market rent for every unit, including the one you will live in.
- FHA subtracts 25 percent, or the appraiser's own allowance for vacancy and upkeep if that is larger.
- What is left must at least equal the monthly principal, interest, taxes and insurance.
The test starts at the third unit. For your own estimate, use the market rent for each unit and the payment at your price.
If a home comes up short, three things can fix it: a lower price, a larger down payment or a different loan. Fannie Mae's rules for conventional loans have no such test. Higher interest rates raise the payment and not the rent, so run it again if rates move.
GOOD TO KNOW
The official result comes with the appraiser's rent, after you are under contract. Confirm the unit count with your lender: FHA counts a duplex with an ADU, such as a garage apartment, as three units, and the test applies there too.
Yours is a little different. They all are.
Tell us what you are looking at and what you are trying to do. We answer with the numbers on your situation.
Free. No credit pull.
WHERE THIS COMES FROM
- HUD Handbook 4000.1 (FHA), revised 8/12/2026: three- to four-unit homes and the self-sufficiency test, printed pages 170 to 171
- Series Homes analysis of 2025 HMDA data: FHA home-purchase applications for a principal residence, by number of units (FFIEC/CFPB HMDA Data Browser download)
- Fannie Mae Selling Guide B3-3.8-01, General Rental Income Information (09/02/2026)
Researched and written by Series Homes. Checked against its sources on . Lending rules change. This page is general information, not a loan offer or legal or tax advice.