sfrcalc.comDSCR Loans Explained: How Lenders Size a Rental Property Loan
A conventional mortgage looks at you — your income, your tax returns, your debt-to-income ratio. A DSCR loan looks at the property instead. DSCR stands for Debt Service Coverage Ratio, and it measures whether a property's own rental income covers its own mortgage payment, independent of what you make at your job.
That single difference is why DSCR loans have become a standard tool for investors who own several rentals, are self-employed, or simply don't want a lender combing through personal tax returns for every acquisition.
The formula
Net operating income (NOI) is rental income minus operating expenses — taxes, insurance, HOA, management, maintenance, vacancy — but before the mortgage payment. Annual debt service is the total principal and interest due on the loan for the year. A DSCR of 1.0 means the property's income exactly covers its mortgage payment, with nothing left over.
| Annual NOI | $21,600 |
| Annual debt service (P&I) | $18,000 |
| DSCR | 1.20 |
What ratio do lenders want?
Requirements vary by lender, but the common bands are:
- Below 1.0 — the property doesn't cover its own debt service. Most DSCR lenders won't qualify a loan here, or will require a larger down payment to shrink the loan amount (and therefore the debt service) until the ratio clears their minimum.
- 1.0 – 1.25 — the typical minimum range most DSCR lenders qualify around.
- 1.25 and above — often unlocks better pricing: a lower rate or a smaller required down payment, since the cushion between rent and payment is larger.
Why the loan amount is a function of rent, not your income
Because DSCR loans qualify off the property, the maximum loan a lender will offer is effectively backed into from the rent: given the property's NOI and the lender's minimum DSCR, there's a maximum monthly payment the loan can carry — and from that payment, a maximum loan amount at the going rate and term. Raise the rent (or lower expenses) and the property can support a larger loan. This is also why an appraiser's rent estimate matters as much as the sale price on a DSCR purchase or refinance — it directly sets your borrowing power.
Conventional mortgage
Qualifies off your personal income, tax returns, and debt-to-income ratio. Usually cheaper. Slower, more paperwork, capped by how many financed properties you can hold.
DSCR loan
Qualifies off the property's own rent. No tax returns or personal income verification. Faster close, easier to scale across multiple properties — usually at a modestly higher rate.
Where DSCR loans show up most
Two situations in particular lean on DSCR financing: buying additional rentals once you've hit the number a conventional lender will finance under your personal name, and refinancing out of a BRRRR deal's initial hard money or bridge loan — where the whole point is qualifying off the property's new, post-rehab rent rather than re-underwriting your personal finances every time.