Interest coverage measures how many times a company's operating profit covers its interest bill. It is operating profit divided by interest expense. It matters more than total debt, because debt is only dangerous when it cannot be serviced from the profits the business actually produces.
Why the total debt figure misleads
A $5 billion debt load is meaningless without knowing what the business earns. A utility earning $3 billion a year carries it comfortably. A retailer earning $400M does not. Coverage collapses that comparison into one number that travels across industries and company sizes.
Worked example
A company reports $350M of operating profit and $70M of interest expense. A downturn cuts operating profit by 40%.
Normal year: $350M ÷ $70M = 5.0×
Bad year: $210M ÷ $70M = 3.0×
Still comfortable. Run the same 40% decline on a company starting at 2.0x and coverage falls to 1.2x, which is the point at which lenders begin setting the agenda.
What the levels mean
- Above 5x is comfortable for most businesses, with room to absorb a downturn.
- 2x to 5x is workable for a stable, predictable company and tight for a cyclical one.
- Below 2x means most of what the business earns is going to lenders, and a modest decline in profit puts the company in breach of its covenants.
- Below 1x means the company is not earning its interest bill and is funding it from cash reserves or new borrowing.
As with every ratio, apply the industry's own cyclicality. A miner at 4x in a good year may be at 1x in a bad one, and bad years arrive without warning.
Where it belongs in an analysis
It is the fastest single check on balance sheet risk, and it is the third of the five dividend safety checks, because a heavily indebted company protects lenders before shareholders. It has no choice: the loan agreement says so and the dividend policy does not.
Pair it with the debt maturity schedule from the notes. Coverage of 3x with nothing due for eight years is a different situation from 3x with a large refinancing next year, particularly when rates have moved since the debt was issued.
Two refinements
Some analysts use EBITDA instead of operating profit, which raises the ratio by ignoring depreciation. For a capital-intensive business that is flattering rather than informative, since the assets genuinely wear out and replacing them competes with the interest bill for the same cash.
A stricter version divides free cash flow by interest expense. It is the most honest measure, because interest is paid in cash rather than in operating profit, and it is the version that catches companies whose reported profit and actual cash have drifted apart.
Debt tolerance depends on the phase
Coverage of 3x is reckless for a company still burning cash and routine for a mature one with predictable flows. Phase Check reads the financials for any US-listed company and places it on the lifecycle in seconds.
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Frequently asked questions
Related
- How to read a balance sheet, where the debt and its maturities sit
- Is a dividend safe?, coverage is the third of five checks
- Free cash flow, the stricter denominator for the same test
- Investing glossary, every term used above, defined in plain English