DSCR (Debt Service Coverage Ratio) Calculator
Evaluate whether your property's net operating income (NOI) comfortably covers your annual mortgage debt service.
Debt Service Coverage Ratio (DSCR) Calculator
Evaluate net operating income against annual loan payments
Total Annual Debt Service: $187,500/yr ($15,625/mo)
- ≥ 1.25x: Standard Commercial Bank Minimum Threshold
- 1.15x - 1.20x: Acceptable for prime Long-term Net Lease/Government tenants
- < 1.00x: Distressed / Negative Cash Flow
Underwriting Analysis
Income fails to cover debt payments (cash deficit)
Tight cushion; most conventional lenders require 1.20x+
Standard institutional lender target for agency/CRE loans
What Is DSCR and Why It Matters
The Debt Service Coverage Ratio (DSCR) is the single most important risk metric used by commercial real estate lenders to evaluate mortgage applications. It measures a property's annual Net Operating Income (NOI) against its annual debt service (total principal and interest payments), reflecting the safety margin between operational cash flow and mortgage obligations. Commercial banks and institutional lenders typically require a minimum DSCR of 1.20x to 1.25x. This buffer ensures that the property generates sufficient surplus cash flow to withstand unexpected vacancy spikes, rent concessions, or rising operating expenses without defaulting on loan payments.
The Formula
DSCR = Annual NOI / Annual Debt ServiceWorked Commercial Property Example
Consider a hypothetical 24-unit multifamily property.
- Net Operating Income (NOI): $227,200 (see how we calculated this property's NOI)
- Annual Debt Service: $170,152 (based on a $2.1M loan at 6.5%, see how we calculated this commercial loan payment)
Calculation: DSCR = $227,200 (NOI) / $170,152 (Debt Service) = 1.34x
A 1.34x ratio is very healthy, comfortably exceeding most lenders' 1.20x minimum requirement. Once you confirm debt safety, you can use the remaining cash flow after debt to evaluate your equity Cash-on-Cash Return, or head to the full Deal Analyzer tool to stress-test this coverage against higher vacancy rates.
DSCR Underwriting Pitfalls & Stress Testing
1. Floating Rate & Rate Reset Exposure: A 100–200 bps rate hike upon loan reset can rapidly erode a healthy 1.25x DSCR into debt service default territory (< 1.0x).
2. Tenant Concentration & Lease Expiry: Single-tenant properties face catastrophic DSCR drop if the tenant defaults. Always stress-test against localized vacancy spikes.
Frequently Asked Questions
What is a good DSCR ratio for a commercial real estate loan?
Most commercial banks, CMBS lenders, and life insurance companies require a minimum DSCR between 1.20x and 1.25x. Stabilized single-tenant net-lease properties may qualify at 1.15x, while higher-risk asset classes (like hospitality or value-add retail) often require 1.35x to 1.50x.
What happens if DSCR falls below 1.0?
A DSCR below 1.0x means the property does not generate enough net operating income to cover its debt payments (negative cash flow). Lenders will decline new loan applications, and for existing loans, a sub-1.0 DSCR can trigger default covenants requiring the borrower to pay down principal.
How can an investor improve a property's DSCR?
You can increase DSCR by either increasing NOI (raising rents, reducing vacancy, cutting operating costs) or lowering annual debt service (increasing your down payment to borrow less, negotiating a lower interest rate, or extending the amortization period).
How does DSCR differ from Cap Rate and Cash-on-Cash Return?
Cap Rate measures property return independent of debt; Cash-on-Cash Return measures leveraged equity return; DSCR measures debt coverage safety margin. Lenders rely on DSCR to dictate maximum loan sizing.
Run Complete Underwriting Including DSCR in Deal Analyzer
Calculate Cap Rate, Cash-on-Cash, DSCR, and BER simultaneously with stress testing.