How Is the Debt Service Coverage Ratio Calculated on a DSCR Loan?
Divide the property's rent by its payment, using what each lender counts as rent and as payment. For example, a hypothetical property renting for $2,400 a month with a $2,000 monthly payment has a ratio of 1.2, which means the rent covers the payment with $400 to spare. A ratio of 1.0 means the rent covers it exactly, and anything under 1.0 means it falls short.
Last updated October 13, 2026What counts as the payment?
Lenders word it a little differently, so it's worth asking. One lender's published formula divides gross monthly rent by PITIA: principal, interest, property taxes, homeowners insurance and any association dues. Another divides gross rental income by the property's total monthly debt obligation.
The payment side matters as much as the rent. A bigger payment figure, say from higher taxes or association dues, lowers the ratio on the same rent.
Where does the rent figure come from?
From the lender's underwriting, not just your own estimate. One lender says it sets rental income from an appraiser's market rent analysis or from automated rental valuation models. Another requires an appraisal to verify both the property's value and its rental income.
How do banks measure the same idea?
The Office of the Comptroller of the Currency, which supervises national banks, uses the ratio for commercial real estate too. Its examiner handbook divides net operating income by annual debt service, so it starts from the property's income after expenses rather than its gross rent. The handbook also says the right ratio depends on how the loan amortizes and how steady the income is.
How would a conventional loan count the same rent?
Differently. For an ordinary long-term rental bought with a conventional loan, Fannie Mae's Selling Guide has the lender multiply the gross monthly rent by 75%, then subtract the property's full payment. With the same hypothetical $2,400 rent and $2,000 payment, that's $1,800 minus $2,000, a $200 shortfall. Under Fannie's guide, a negative result like that counts against your debt-to-income ratio. Fannie's separate rule for short-term rentals uses 50% of the monthly gross rent before subtracting the payment, and a positive result there can only offset the property's own payment. For more, see how a DSCR loan compares with a conventional investment property loan.
| Basic idea | Rent divided by the payment; lenders word the formula differently |
|---|---|
| A ratio of 1.0 | Rent covers the payment exactly |
| Above 1.0 | Rent covers the payment with some left over |
| Below 1.0 | Rent falls short of the payment |
| What's in the payment | Varies by lender; one lists principal, interest, taxes, insurance and association dues |
| Conventional comparison | Fannie Mae counts 75% of gross rent on a long-term rental purchase (50% for a short-term rental), then subtracts the full payment |
Related questions
Sources
- https://www.occ.gov/publications-and-resources/publications/comptrollers-handbook/files/commercial-real-estate-lending/pub-ch-commercial-real-estate.pdf
- https://selling-guide.fanniemae.com/sel/b3-3.8-01/general-rental-income-information
- https://selling-guide.fanniemae.com/sel/b3-3.8-02/rental-income-subject-property
- https://www.kiavi.com/loans/dscr
- https://angeloakms.com/programs/investor-cash-flow-mortgage-program/
- https://www.griffinfunding.com/non-qm-mortgages/dscr-loans/
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Educational information only, not individualized financial or legal advice. Program details and rates change; verify current terms with a licensed loan officer before making a decision.