Definition
Interest coverage ratio measures how easily a business can pay interest from operating earnings.
Formula
Interest coverage = EBIT / interest expense (common)
Example
If EBIT is $2M and interest expense is $400k, coverage is 5.0x.
How to use it
- Low coverage increases financing risk and can constrain growth.
- Use cash flow based views when earnings are noisy or non-cash heavy.
- Track trendline coverage, not just a single quarter.
Common mistakes
- Using EBITDA instead of EBIT without noting the difference.
- Ignoring seasonality that makes coverage appear worse in slow quarters.
Measured as
Interest coverage = EBIT / interest expense (common)
Misused when
- Using EBITDA instead of EBIT without noting the difference.
- Ignoring seasonality that makes coverage appear worse in slow quarters.
Operator takeaway
- Low coverage increases financing risk and can constrain growth.
- Use cash flow based views when earnings are noisy or non-cash heavy.
- Track trendline coverage, not just a single quarter.
- Tie Interest Coverage Ratio to the same balance-sheet date, scenario, and decision memo you are using elsewhere in the model.
- Document which claims, costs, or adjustments your team includes before comparing numbers across forecasts, covenants, or valuation work.
Next decision
- Read Loan amortization: how monthly payments and total interest work if the decision depends on interpretation, policy, or trade-offs beyond the raw formula.
- Decide whether Interest Coverage Ratio belongs in cash planning, valuation, or debt monitoring so the number is used in the right model.
Where to use this on MetricKit
Guides
- Loan amortization: how monthly payments and total interest work: A practical guide to loan amortization: monthly payment formula, why interest dominates early, and how term and rate affect total interest.