Can I use rental income to qualify for a mortgage?
Yes — and for move-up buyers it is often the difference between qualifying and not. Instead of selling your current home or carrying both full payments in your debt-to-income ratio, lenders can generally count 75% of documented market rent from the home you are leaving against its mortgage payment (the 25% haircut covers vacancy and maintenance). With a $1,800 payment and $2,200 documented rent, the old house consumes $150 of monthly qualification room instead of $1,800. Documentation carries the deal: typically an executed lease, evidence of the deposit or first month’s rent, and sometimes an appraiser’s rent schedule — program rules differ, so the exact checklist depends on your loan.
Last reviewed 2026-08-24
| Key number | Value | Source |
|---|---|---|
| Rental income typically counted for qualification | 75% of documented market rent | Fannie Mae Selling Guide B3-3.1-08 |
The DTI math that turns a no into a yes
Carrying both homes with no rental offset stacks both full payments into your ratio — $1,800 old, $2,400 new, plus other debts, and a $7,000 income is instantly past any limit. Offset the old payment with 75% of a $2,200 rent ($1,650) and its net drag falls to $150; the same borrower lands in the low 40s DTI and qualifies. Nothing about the houses changed — only whether the underwriting file documents the rent. How DTI limits work
The documentation that makes rent count
Underwriters count rent they can verify, not rent you predict. Depending on the program: an executed lease (commonly 12 months), proof the security deposit or first month’s rent actually landed in your account, and in some cases an appraisal rent schedule establishing market rent for the property. Agency rules on when departure-residence rent may offset the payment have shifted over the years, so treat the checklist as program-specific and get it from your lender early — before you list, lease, or make offers.
Sell vs rent: the decision behind the decision
Renting the departure home keeps its (often low-rate) financing and adds a growing asset — at the price of becoming a landlord: vacancies, repairs, tenants, and less liquidity. Selling releases equity for the next down payment and keeps life simple. The qualification rules merely determine whether the rent-it path is open; whether to take it is a portfolio-and-lifestyle decision. Notably, this is the standard escape from the low-rate lock-in problem — keep the cheap loan working as a rental rather than surrendering it. The low-rate lock-in decision
DSCR loans: when the property qualifies instead of you
For buying investment property (rather than offsetting a departure home), there is a lane where your personal income barely matters: DSCR loans underwrite the property’s own debt-service coverage ratio — gross monthly rent divided by the full monthly payment (principal, interest, taxes, insurance, association dues). A ratio above 1.0 means the property covers itself; lenders typically want that or better, and price by how much cushion exists. DSCR loans cost more than conventional financing, but they scale with a portfolio in a way personal-DTI lending cannot.
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