Finance

DSCR Calculator (Debt Service Coverage Ratio)

Find the debt service coverage ratio for a rental, commercial property, or small business. You can solve for DSCR, the required NOI, or the maximum debt service at a target ratio.

Reviewed and updated

How to use
  1. Pick what to solve for: DSCR, required NOI, or max debt service.
  2. Enter net operating income and annual debt service.
  3. Set a target ratio if you are solving backward.
Estimates for general information, not financial advice. Confirm figures before making money decisions.
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Income divided by loan payments

DSCR = NOI ÷ annual debt service

DSCR shows whether a property's earnings can cover its loan. Net operating income (rent minus operating costs, before any loan payment) goes on top; the year's total loan payments — principal plus interest — go on the bottom. A result above 1 means income more than covers the debt.

What the number is telling a lender

DSCRMeaningLender view
1.50+Income is 50% above the paymentLow risk, best terms
1.25–1.50Comfortable cushionStandard commercial minimum
1.10–1.25Thin marginMarginal; SBA floor is 1.10
Below 1.00Income falls short of the paymentUsually declined

1.25 is the figure most commercial lenders treat as the pass mark. Riskier property types (hotels, retail) can be held to a higher bar.

A worked example, and the two levers

  • Example. NOI $400,000, annual debt service $300,000 → DSCR = 1.33. Income covers the loan 1.33 times, an acceptable profile.
  • Raise NOI. Higher rent, lower vacancy or added income (parking, services) lifts the top of the ratio.
  • Lower debt service. Refinancing to a lower rate or a longer term shrinks the annual payment and raises DSCR.

Common questions

What does a DSCR of 1.25 mean?

The property or business earns 1.25 times its annual loan payments in net operating income. For every dollar of debt payment there is $1.25 of income, leaving a 25% cushion. This is the level most commercial lenders want to see.

What happens if DSCR is below 1.0?

A ratio under 1.0 means operating income does not cover the debt payments. The owner has to make up the shortfall from reserves or other sources, and most lenders will decline the loan at that level.

Does NOI include the loan principal?

No. Net operating income is measured before any debt service. The debt service figure, which includes both interest and principal, sits on the other side of the ratio. Mixing them is the most common DSCR mistake.

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