Interest Coverage Ratio: Can the Business Carry Its Debt?
The interest coverage ratio measures how many times operating profit covers interest expense. We explain how to calculate it, how to read it, and why it matters more when rates rise.
Debt is not bad — failing to pay the interest is
Debt helps a business expand faster. But debt comes with the obligation to pay interest regularly, no matter how good or bad business is. The interest coverage ratio answers a vital question: does the profit a business generates cover its interest expense, and by how much?
How to calculate it
Interest coverage = EBIT divided by Interest expense
EBIT is profit before interest and tax (operating profit). The result shows how many times operating profit covers the interest expense.
Example: EBIT of 500, interest expense of 100, so the ratio = 5.0. It means the business earns 5 times the amount it needs to pay interest — a wide safety cushion.
How to read it
- High ratio (for example above 5): the business comfortably covers interest, with a large cushion even if profit drops.
- Low ratio (around 1.5 to 2): profit only just covers interest, with high risk if business deteriorates or rates rise.
- Ratio below 1: operating profit does not cover interest — a serious red flag, the business must use reserves or borrow more just to pay interest.
Why it matters more when rates rise
This is the key point in the macro context. When the central bank raises rates, a business interest expense (especially floating-rate debt or debt being refinanced) rises, so the denominator swells, so the interest coverage ratio falls.
A heavily indebted business with a thin ratio may be fine in a low-rate environment but becomes fragile when rates climb. This is why investors scrutinize this ratio during monetary tightening cycles.
Read it with other debt measures
The interest coverage ratio shows the ability to carry debt; combine it with:
- Debt-to-equity ratio (D/E) — the size of debt versus equity.
- Free cash flow — the real cash to pay both principal and interest.
- Quick ratio — short-term solvency.
A business with a lot of debt but a high coverage ratio and strong cash flow is still safer than a business with little debt but shaky profit.
Conclusion
The interest coverage ratio measures how many times operating profit covers interest expense — a gauge of whether a business can carry its debt. Higher is safer; below 1 is an alarm. The ratio matters especially when rates rise. Read it alongside the size of debt and cash flow to assess true financial risk.
Next step
Once you understand the business, let your accumulation run automatically and with discipline.
👉 Open fastbot — automated DCA and take-profit, free 7-day trial.