DSCR explained: the one ratio that decides your loan

Every commercial real estate loan turns on a handful of numbers, but one sits above the rest. The debt service coverage ratio — DSCR — is the figure underwriters reach for first and defend most stubbornly. Understand it and the rest of the financing conversation suddenly makes sense.

The definition

DSCR is net operating income divided by annual debt service. NOI is the property's income after operating expenses; annual debt service is the total of principal and interest payments due over a year. The ratio answers a blunt question: for every dollar the property owes its lender, how many dollars of income does it actually produce?

A DSCR of 1.0x means the property earns exactly enough to cover its debt and nothing more. Above 1.0x, there is surplus cash flow — a cushion. Below 1.0x, the property does not generate enough to pay its own mortgage, and the owner is feeding it from elsewhere.

Why lenders insist on a cushion

Lenders do not fund to break-even. A common minimum DSCR is 1.25x — a 25% cushion of income above the debt payment. That margin is the buffer against the things underwriting can't perfectly predict: a tenant that leaves, a roof that fails, a soft leasing year, a tax reassessment. At 1.25x, the property can absorb a meaningful shock and still make its payments. At 1.0x, the first bad month is a missed payment.

It varies by property type

There is no single universal threshold; the required coverage scales with how risky and how volatile a property's income is. Stable, residential-style cash flow is treated more generously than income that swings with the economy.

• Multifamily, with its many tenants and steady demand, often clears at a lower bar — roughly 1.20x to 1.25x.
• Retail and office, where a single tenant's departure can dent income, commonly require around 1.25x to 1.35x.
• Hospitality, whose nightly revenue is the most volatile of all, is held to a higher coverage requirement still.

How DSCR caps your loan

Here is the part borrowers most often miss: DSCR frequently determines your maximum loan size before loan-to-value ever comes into play. Because the ratio is income divided by debt service, the lender's coverage minimum sets a ceiling on how much debt service the property can support — which in turn caps the loan amount at a given rate. A building can be worth far more than the loan you're requesting and still get sized down, simply because its cash flow can only cover so much debt at the required cushion.

Using it to your advantage

Because DSCR is income over debt service, you have three levers to improve it: raise NOI, lower the loan amount, or reduce the debt service (through rate or amortization). The most durable of these is NOI. Every dollar of genuine, defensible income you can add to the property — through higher occupancy, market-rate renewals, or trimmed expenses — directly lifts your coverage and, with it, the loan you can support. Learn to calculate your own DSCR before you ever call a lender. It tells you, in one number, roughly how much debt your property can actually carry.