# DSCR Loans Explained: How to Calculate Debt Service Coverage Ratio Understand income-based rental-property lending. Learn the formula, a worked example, and how DSCR sets how much you can borrow. **Author:** Nathaniel Pitchon-Getzels (Licensed Real Estate Partner & Investment Strategist) — https://www.scouthavens.com/about **Published:** 2026-10-05 · **Updated:** 2026-10-07 **Category:** Financial Modeling & Returns **Canonical URL:** https://www.scouthavens.com/blog/dscr-loan-guide-how-to-calculate-dscr --- ## What Is DSCR? The debt service coverage ratio (DSCR) compares a property's income to its loan payments. A DSCR loan is a mortgage for investment property that a lender approves mainly on that ratio rather than on your personal income, while still applying property, credit, reserve, and other eligibility requirements. DSCR = Net Operating Income ÷ Annual Debt Service A DSCR of 1.0 means income exactly covers the loan payment. Above 1.0, the property earns more than the payment; below 1.0, it does not. Lenders set their own minimums, so confirm the current requirement with the lender. Many look for something in the range of 1.0 to 1.25 or higher, and a stronger ratio generally earns better terms. ## Two DSCR Definitions: Match Your Lender This guide and Haven’s calculator use net operating income divided by principal-and-interest debt service. Some residential DSCR programs instead divide qualifying monthly rent by principal, interest, property taxes, insurance, and association dues (PITIA). [Visio Lending describes the rent/PITIA approach](https://visiolending.com/resources/what-is-a-dscr-loan-how-rental-property-investors-qualify/). Ask your lender which rent figure, expense deductions, and payment components apply; the two ratios are not interchangeable. ## Worked Example: NOI-Based Coverage - **NOI:** $45,024 (from our [NOI example](/blog/how-to-calculate-noi-real-estate)) - **Loan:** $450,000 at 7.00%, 30-year fixed - **Monthly payment:** about $2,994, so **annual debt service is about $35,927** - **DSCR:** $45,024 ÷ $35,927 = **1.25** ## Stress-Test the Income Before Borrowing Using the example above, a 10% reduction in NOI takes $45,024 to $40,521.60. With annual debt service unchanged at $35,927, coverage falls from approximately 1.25 to 1.13. At a 20% NOI reduction, $36,019.20 divided by $35,927 is approximately 1.00. These are hypothetical sensitivities, not forecasts. Recheck vacancy, repairs, insurance, and tax assumptions instead of treating a base-case ratio as a guarantee. ## How Much Can You Borrow? Work the formula backward. If a lender requires a 1.25 DSCR, the most debt service the property can carry is NOI ÷ 1.25, which is $45,024 ÷ 1.25 = $36,019 a year, or about $3,002 a month. At 7.00% over 30 years that supports a loan of roughly $451,000. A lower rate raises that number and a higher rate cuts it, so DSCR is very sensitive to interest rates. ## How to Improve Your DSCR - **Raise NOI:** increase rents toward market, cut controllable expenses, or add income such as parking or laundry. - **Lower debt service:** put more money down, shop the rate, or choose a longer amortization or an interest-only period if the lender allows it. - **Pick a different property:** a higher [cap rate](/blog/what-is-a-good-cap-rate) relative to the loan rate is the simplest way to a stronger ratio. ## Test Your Deal Plug your numbers into the free [DSCR Loan Calculator](/tools/dscr-calculator) to see your ratio and maximum loan. Then see how it fits into the whole picture in our [deal analysis guide](/blog/complete-real-estate-deal-analysis-guide). ## Frequently Asked Questions **Q: What is a good DSCR for a rental property?** A: A DSCR above 1.0 means the property covers its debt payment. Many DSCR lenders look for about 1.0 to 1.25 or higher, but requirements vary by lender and loan type, so confirm directly. **Q: Do DSCR loans check my personal income?** A: They are underwritten mainly on the property's income rather than your tax returns or pay stubs, though lenders still look at credit, down payment, and reserves. **Q: How is DSCR different from cash flow?** A: DSCR is a ratio (income divided by debt payment). Cash flow is a dollar amount (income minus debt payment). A DSCR of 1.25 means income is 25% higher than the payment. --- *Source: Haven by ScoutHavens (https://www.scouthavens.com). Data methodology: https://www.scouthavens.com/methodology.*