What is the debt service coverage ratio (DSCR)?
The debt service coverage ratio (DSCR), also called the debt coverage ratio (DCR), measures whether property net operating income (NOI) is large enough to cover annual debt service. Lenders use DSCR to size commercial real estate loans. This calculator solves for DSCR, required NOI, or maximum debt service. All math runs in your browser.
NOI is operating revenue minus operating expenses before debt payments. If you are sizing a mortgage payment first, try the mortgage calculator with taxes and insurance. For a broader fixed-charge view that includes leases, open the fixed charge coverage ratio calculator. To stress-test loan payoff timing, use the mortgage acceleration calculator.
DSCR formula
Annual debt service is the total of principal and interest paid on the loan in one year. Many lenders want at least 1.25x for stabilized commercial property. The SBA often cites 1.15x as a minimum for certain 7(a) loans.
Worked example: $120,000 NOI, $96,000 debt service
- Annual NOI: $120,000
- Annual debt service: $96,000
- DSCR: $120,000 / $96,000 = 1.25x
A 1.25x ratio means NOI exceeds debt service by 25%, a common lender benchmark. Switch the solve mode to find the NOI needed for a target DSCR or the maximum debt service your NOI can support.
Frequently asked questions
What is a good DSCR for commercial real estate?
What counts as annual debt service?
How is NOI different from net income?
Can I solve for required NOI instead of DSCR?
Are the results stored?
Resources and references
The formulas and methods in this calculator were checked against these independent sources.