Debt Service Coverage Ratio Calculator (DSCR)

The DSCR calculation compares a property's Net Operating Income (NOI) against its total annual debt service. First, NOI is derived by taking the gross rental income, subtracting estimated vacancy losses, and deducting operating expenses. Next, the annual loan payment is determined using the total loan amount, interest rate, and repayment term. Finally, the DSCR formula divides NOI by the total loan payment: DSCR = NOI / Loan Payment. A ratio of 1.0 indicates that the property generates exactly enough income to cover its debts, while ratios above 1.0 represent positive cash flow cushion.

Imagine you are evaluating a small apartment building with a gross rental income of $120,000 per year. Assume a 5% vacancy rate and operating expenses that consume 35% of your adjusted revenue. First, calculate the Net Operating Income: NOI = $120,000 * (1 - 0.05) * (1 - 0.35) = $74,100. Next, suppose you take out a total loan of $800,000 at a 6.5% interest rate over a 25-year term, resulting in an annual loan payment of approximately $64,320. Dividing your NOI by the loan payment gives your DSCR: $74,100 / $64,320 = 1.15. This indicates a modest positive cash flow margin for the investment.

When analyzing a potential real estate acquisition, always use realistic vacancy rates based on historical neighborhood data rather than overly optimistic projections. Ensure your operating expenses account for property taxes, insurance, routine maintenance, and professional property management fees. Lenders typically look for a minimum DSCR between 1.20 and 1.25, so identifying ways to boost rental income or reduce operating overhead can significantly improve your borrowing power.