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 principal and interest payments
- ≥ 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
3-Way Maximum Loan Sizing (LTV vs Debt Yield vs DSCR)
Lenders evaluate commercial loan capacity across three distinct risk metrics and advance the lowest (most restrictive) amount.
Underwriting Inputs
Governing (Binding) Loan Constraint
This loan is strictly constrained by LTV & Debt Yield. The maximum allowable loan principal is $2,500,000.
If interest rates rise by 100 bps (to 7.50%), the DSCR-supported loan capacity shrinks from $2,636,847 to $2,383,627 (-$253,220). The governing constraint is DSCR.
| Rate \ NOI | -10% ($225,000) | Base ($250,000) | +10% ($275,000) |
|---|---|---|---|
| -1.0% (5.50%) | 1.34x | 1.48x | 1.63x |
| Base (6.50%) | 1.20x | 1.33x | 1.47x |
| +1.0% (7.50%) | 1.08x | 1.21x | 1.33x |
Client-Side CRE Underwriting & Ratio Analysis
Your calculated DSCR is 1.33x. crecalculators.com is an independent calculation tool, not a loan broker, lender, or financial intermediary. Every calculation runs 100% locally in your browser — no account required, no personal contact data collected, and no financial details transmitted.
100% Client-Side Calculation · No Data Collected or Transmitted · Independent Tool
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 ($2M Commercial Building)
Consider a commercial building acquisition priced at $2,000,000 with a $1,500,000 senior commercial mortgage:
- Net Operating Income (NOI): $150,000 ($220,000 EGI minus $70,000 OpEx; see how we calculated this property's NOI)
- Annual Debt Service: $121,536 (based on a $1.5M loan at 6.50% interest, 25-year amortization; see how we calculated this commercial loan payment)
Calculation: DSCR = $150,000 (NOI) ÷ $121,536 (Debt Service) = 1.23x
A 1.23x ratio satisfies conventional commercial bank underwriting standards (typical 1.20x to 1.25x minimum). Once you confirm debt safety, you can use the remaining $28,464 annual cash flow 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 indicates that the property's net operating income alone is insufficient to cover its debt service, creating an operational cash flow shortfall. For new financing, conventional commercial lenders typically will not approve standard permanent loans without compensating factors, though approval may depend on the loan program, borrower liquidity, cross-collateralization, personal guarantees, or structured reserves (such as bridge or debt-yield loan structures). For existing loans, whether sub-1.0x DSCR constitutes a technical default or triggers remedies (such as cash sweeps, principal paydown demands, or reserve replenishments) depends strictly on the covenants and cure provisions in the specific loan agreement.
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.
The Complete Guide to DSCR (Debt Service Coverage Ratio)
Learn what lenders actually look for, worked 20-unit calculation steps, how debt constants affect sizing, and how to improve your ratio before submitting a loan application.
Run Complete Underwriting Including DSCR in Deal Analyzer
Calculate Cap Rate, Cash-on-Cash, DSCR, and BER simultaneously with stress testing.