How do mortgage lenders count rental income?
The full answer
For seasoned rentals, underwriters work from Schedule E: rents received minus real expenses, with depreciation, and often the mortgage interest, taxes and insurance already counted in the payment, added back. A property that shows a taxable loss can still contribute positive qualifying cash flow once the paper deductions return.
For a purchase, there's no history yet, so the appraiser's market-rent opinion (or the executed lease) sets the number and the lender applies a vacancy haircut — 75% is the convention across major programs. If 75% of rent exceeds the property's full payment, the surplus adds to your income; if it falls short, the shortfall counts as your debt.
Two edges to know: some programs restrict using rental income from a departing primary residence without equity or reserve conditions, and short-term-rental income is inconsistently accepted — some lenders average host-platform statements, others want it on returns. When personal-income math still fails, DSCR loans qualify the property on its own rent-to-payment ratio instead.
How much of the market rent actually counts?
Typically about 75%, with the remainder treated as a vacancy and maintenance allowance. On a purchase the figure comes from the appraiser's rent schedule rather than your own projection.
Does an existing rental need to be on my tax return?
If you've owned it long enough to file, yes — Schedule E is the primary evidence, with depreciation added back. A recently acquired rental with no filing history is assessed from the lease and the appraisal instead.
Related questions
If this came up, these usually do too — the short answer to each, with a link to the full breakdown:
- Can I live in a home I bought with a DSCR loan?No. DSCR loans are business-purpose loans made on the premise that the property is a rental generating the income that qualifies the loan.…
- Can I get a mortgage as a gig worker (Uber, DoorDash, freelance)?Yes. Gig and platform workers are self-employed and qualify through the same paths as other self-employed borrowers — conventional with two…
- How do mortgage lenders calculate K-1 income from a partnership or S-corp?If you own 25% or more, lenders treat you as self-employed: they use the ordinary income on your K-1 (plus guaranteed payments and any W-2…
- Do mortgage lenders use gross or net income for self-employed borrowers?Net income. On a conventional loan, lenders qualify self-employed borrowers on the net profit from your tax returns — gross revenue minus…
- Do tax write-offs hurt your mortgage approval?Yes, on conventional loans. Every business deduction lowers the net income lenders use to qualify you, so aggressive write-offs that cut…
Sources
Educational information only — not financial advice, and not a quote, pre-approval, or offer of credit. Program rules and ranges are illustrative and vary by lender. Mortgage Merlin is a publisher, not a lender or broker.