Commercial Real Estate DSCR Calculator
Calculate the Debt Service Coverage Ratio for commercial property underwriting by deriving NOI from GPR, vacancy, and operating expenses.
Calcady™ · Official Calculation Report Debt Service Coverage Ratio (DSCR) CalculatorApril 7, 2026 calcady.com Debt Service Coverage Ratio (DSCR) CalculatorThe DSCR is the primary underwriting metric for commercial real estate loans. It measures how many times the property's Net Operating Income (NOI) covers its annual debt payments. A DSCR of 1.25 means the property generates 25% more income than its loan requires — the industry standard safety cushion. Sample Deal Scenarios $ Total rent if 100% occupied all year Typical: 5% residential, 8–12% office/retail $ Management, repairs, utilities, reserves $ All property taxes + hazard/liability insurance $ Total principal + interest payments for the year Income Waterfall
OER: 37.9% (industry range: 30–50%) | Break-even ADS for DSCR=1.25: $118,000 EGI = GPR × (1 − V%) = $250,000 × 0.950 = $237,500 NOI = EGI − OpEx − Taxes = $237,500 − $65,000 − $25,000 = $147,500 DSCR = NOI / ADS = $147,500 / $110,000 = 1.3409 DSCR 1.341 Strong / Financeable Standard commercial lender threshold. 1.25 is the minimum for most CMBS/bank loans. <1.0 Neg CF|1.0–1.1 Risky|1.1–1.25 Tight|1.25–1.5 Bank Ready|1.5+ Prime Practical ExampleA real estate investor is analyzing a small apartment building: $250,000 GPR, 5% vacancy, $65,000 OpEx, $25,000 taxes/insurance, $110,000 annual mortgage payment. |
Quick Answer: What DSCR do lenders require?
The Debt Service Coverage Ratio (DSCR) is the single most important underwriting metric in commercial real estate lending. It measures how many times a property's Net Operating Income (NOI) covers its annual mortgage payment (principal + interest). The industry-standard minimum for conventional bank and CMBS loans is 1.25x — meaning the property must generate at least 25% more income than the debt service requires. Below 1.25x, most institutional lenders will decline the loan. Below 1.00x, the property is losing money and cannot cover its own mortgage.
DSCR Requirements by Loan Type
Different loan products have different DSCR floors based on the lender's risk tolerance, loan-to-value ratio, and property type. Understanding these thresholds helps investors structure deals that qualify for financing.
| Loan Type | Min DSCR | Typical LTV | Notes |
|---|---|---|---|
| Fannie/Freddie Agency (Multifamily) | 1.20x – 1.25x | 75-80% | Best rates. Only for 5+ unit apartment buildings. |
| CMBS (Conduit) | 1.25x – 1.35x | 65-75% | Non-recourse. Securitized. Fixed 5-10 yr terms. Heavy prepayment penalties. |
| Local/Regional Bank | 1.25x – 1.40x | 65-75% | Relationship-based. Often requires personal guarantee (recourse). |
| SBA 504 / 7(a) | 1.15x – 1.25x | 80-90% | Owner-occupied only. Lower equity requirement but slower closing. |
| Hard Money / Bridge | 1.00x+ | 60-70% | Asset-based underwriting. DSCR is secondary to property value. Rates 10-14%. |
Pro Tips & Common Underwriting Mistakes
Do This
- ✓Stress-test DSCR at elevated vacancy. A property with 5% vacancy and a 1.35x DSCR looks safe. But if your largest tenant (30% of revenue) leaves, vacancy jumps to 35% and DSCR craters below 1.00x. Always model DSCR at 10%, 15%, and 25% vacancy to understand the true risk envelope.
- ✓Use actual trailing 12-month (T-12) financials. Sellers universally provide "pro forma" projections showing optimistic revenue and minimized expenses. Lenders will use actual historical T-12 operating statements. Always underwrite to real numbers, not projections.
Avoid This
- ✗Don't confuse DSCR with Cap Rate. Cap Rate = NOI / Purchase Price (measures unlevered property yield). DSCR = NOI / Debt Service (measures loan safety margin). A property can have an excellent 7% Cap Rate but a terrible 0.95x DSCR if the buyer took on too much debt. They answer completely different questions.
- ✗Don't exclude capital reserves from operating expenses. Lenders require a CapEx reserve (typically $250-500/unit/year for apartments, or 3-5% of EGI for commercial) deducted before calculating NOI. Omitting reserves inflates your NOI and produces an artificially high DSCR that the lender will immediately correct downward.
Frequently Asked Questions
What happens if my DSCR falls below 1.25x during the loan?
Most commercial loan documents include DSCR covenants. If your DSCR drops below the contracted threshold (typically 1.15x-1.25x) for two consecutive quarters, the lender can trigger several remedies: requiring a cash reserve lockbox (all rental income flows directly to the lender first), restricting distributions to owners, or in extreme cases, declaring a technical default and accelerating the loan. This is why maintaining a cushion above the minimum is critical.
How do I increase my DSCR to qualify for financing?
You have two levers: increase NOI or decrease debt service. To increase NOI: raise rents, reduce vacancy by improving the property, or cut operating expenses. To decrease debt service: put more cash down (borrow less), extend the amortization period (30 years vs 20 years), or find a lower interest rate. The single most impactful lever is usually increasing the down payment — every additional $10,000 of equity reduces your annual debt service and immediately lifts the DSCR.
Is DSCR calculated before or after taxes?
DSCR uses NOI, which is calculated before income taxes but after property taxes. Property taxes and insurance are universally deducted as operating expenses before arriving at NOI. Federal and state income taxes are not included because they vary by ownership structure (LLC, S-Corp, personal) and are considered below-the-line costs personal to the investor, not to the property.