DSCR (Debt Service Coverage Ratio)

The debt service coverage ratio — or DSCR — divides operating cash flow by total annual debt service (interest expense plus principal repayments). A DSCR of 2.0 means the company generates twice the cash needed to service debt. It is the most realistic measure of debt sustainability.

DSCR — key facts

Can operating cash cover all debt service?


Also called	Debt service coverage
Formula	Operating cash flow ÷ (interest + principal)
Unit	Times
Benchmark	1.5 or higher healthy
Below 1.0	Unsustainable; company cannot service debt from operations
1.0 to 1.25	At risk; vulnerable to disruption
1.25 to 1.5	Tight but manageable
Above 1.5	Comfortable; strong debt service capacity
Data required	Operating cash flow, interest expense, principal due

The intuition

Interest coverage asks whether earnings cover interest. DSCR asks whether cash covers both interest and principal — a more realistic test.

A company with strong earnings might struggle with principal repayments if capital spending is heavy. DSCR catches this.

How to calculate it

Operating cash flow ÷ (Interest expense + Principal repayments due in the period).

Example: A company with $500 million in operating cash flow, $40 million in interest, and $60 million in principal due has:

DSCR: $500 million ÷ ($40 million + $60 million) = 5.0

When it works well

Most realistic debt sustainability test. It includes principal repayment, which is a real obligation.

Assessing refinancing risk. A company approaching maturity with DSCR below 1.25 faces refinancing risk.

Evaluating loan capacity. Lenders require DSCR above a threshold (often 1.25 or 1.5) to approve new borrowing.

Comparing cash flow quality. DSCR uses operating cash flow, not accounting earnings.

When it breaks down

Volatility distorts it. A company with lumpy cash flow can have DSCR above 2.0 in good years and below 1.0 in bad years.

It does not account for working capital investments. Operating cash flow includes working capital changes, which can be temporary.

Principal repayment timing matters. A company with the same debt but different maturity profiles has different DSCR.

Using DSCR in practice

Lenders prioritize DSCR:

You calculate operating cash flow.
You estimate interest and principal due.
You assess DSCR over the business cycle.
You project DSCR under stress scenarios.
You compare to lender covenant requirements.

A company with DSCR above 2.0 is well-positioned. One below 1.25 is at risk of covenant breach or distress.