DSCR Explained: What It Means and Why Lenders Care

DSCR shows up constantly in real estate lending conversations, but a lot of investors only vaguely understand what it measures. Here's the plain-English version.

What DSCR Stands For, and What It Measures

DSCR = Debt Service Coverage Ratio. It measures how comfortably a property's income covers its mortgage payment.

The formula:
DSCR = Net Operating Income (NOI) ÷ Annual Debt Service

"Annual debt service" just means your total yearly mortgage payments (principal + interest).

Reading the Number

• DSCR = 1.0means the property's income exactly covers the mortgage payment — zero cushion. One vacancy or repair, and you're underwater that month.
• DSCR above 1.0means there's a buffer. A DSCR of 1.25, for example, means the property generates 25% more income than it needs to cover the mortgage.
• DSCR below 1.0means the property doesn't generate enough income to cover its own debt payment — a real red flag.

Why Lenders Obsess Over This Number

Most commercial and investment-property lenders won't approve a loan below a certain DSCR threshold — often somewhere between 1.20 and 1.30, though this varies by lender and loan type. From a lender's perspective, DSCR is a direct measure of how much cushion exists before a borrower might miss a payment. A property with a thin DSCR (say, 1.05) is judged as fragile: a short vacancy, a rate reset, or an unplanned repair could push it below breakeven.

A Quick Example

A property generates $40,000 in annual NOI. The mortgage payment totals $32,000 a year.

DSCR = $40,000 ÷ $32,000 = 1.25

That's a healthy cushion — the property earns 25% more than it needs to cover debt.

DSCR Isn't Just a Lender Metric — It's a Risk Signal for You

Even if you're not applying for a DSCR loan, calculating this number for yourself is one of the fastest ways to gauge how exposed a deal is to a bad month. A property with a DSCR of 1.05 might still cash flow positive on paper, but it's living close to the edge.

See DSCR Calculated Transparently, Alongside Every Other Metric

Aurum Reserve calculates DSCR automatically for every deal you analyze — Long-Term Rental, Short-Term Rental, Fix & Flip, or Multifamily — and shows the exact formula and inputs behind the number, not just the result.