What is the debt service coverage ratio?
The debt service coverage ratio, or DSCR, measures how comfortably a company's cash flow covers its debt payments. It divides the cash available for debt service over a period by the total debt service due — the principal and interest the company owes — in that same period. A DSCR of 1.5x means the business generates one and a half dollars of qualifying cash flow for every dollar of debt payment.
It answers a different question than the leverage ratio. Leverage asks how much debt the company carries relative to earnings; coverage asks whether the company actually produces enough cash to pay what is due now. A business can look modestly levered yet have thin coverage if its payments are front-loaded or its cash flow is volatile.
The dividing line is 1.0x. Below it, cash flow does not fully cover debt service, and the company must dip into reserves, draw on a revolver, or raise capital to stay current. Lenders want a cushion above 1.0x, and many credit agreements set a minimum DSCR as a covenant.
How DSCR is calculated and used
The ratio is straightforward; the definitions of each component are set by the agreement.
- Measure cash available for debt service. Often EBITDA or a defined cash flow figure, sometimes adjusted for cash taxes and maintenance capital expenditures to reflect what is genuinely free to service debt.
- Measure total debt service. Sum the scheduled principal amortization plus cash interest due over the period. On a floating-rate loan, the interest component moves with SOFR.
- Divide. Cash available over debt service yields the DSCR. Above 1.0x means cash flow covers payments with room to spare; below means it does not.
- Test against the covenant. Compare to any minimum DSCR threshold in the credit agreement and to the trajectory expected in the deal plan.
Why coverage matters alongside leverage
Coverage is the timing-and-affordability check that leverage alone misses. A bullet-heavy structure can carry high leverage but strong interim coverage because little principal amortizes until maturity; an amortizing loan can show lower leverage but tighter coverage because it demands steady principal repayment. Both pictures matter, and DSCR captures the one leverage does not.
It is also sensitive to rates. Because most leveraged debt floats over SOFR, a rise in the benchmark increases interest due, lowers DSCR, and can erode the covenant cushion without any change in the business. That sensitivity is why coverage is monitored continuously and why keeping the inputs — current cash flow and floating debt service — accurate is central to spotting trouble before a covenant is breached.