Leverage Ratios and Interest Coverage

Ask a credit analyst to size up a company in ten seconds and they'll reach for two numbers, not a full model: how much debt is piled on top of the business's earnings power, and how easily that debt's interest gets paid out of ongoing cash flow. Almost every rating and spread decision downstream traces back to some version of these two ratios.

The two ratios

$$\text{Leverage} = \frac{\text{Total Debt}}{\text{EBITDA}}$$

In words: debt expressed in "turns" of annual pre-interest, pre-tax cash earnings. A company at 6x leverage would need six years of current EBITDA, undiverted to anything else, to pay off its debt.

$$\text{Interest Coverage} = \frac{\text{EBITDA}}{\text{Interest Expense}}$$

In words: how many times the company's operating cash earnings could pay its actual annual interest bill. A coverage ratio near 1x means virtually all earnings are consumed just servicing debt, leaving nothing for reinvestment or a cushion against a bad quarter.

Worked example

A company reports EBITDA of $200 million, total debt of $1.2 billion, and annual interest expense of $72 million.

1. Leverage. $1{,}200 / 200 = 6.0x$ — a highly leveraged, likely high-yield-rated profile.
2. Interest coverage. $200 / 72 \approx 2.8x$ — earnings cover interest just under three times over, thin but not immediately alarming for a leveraged issuer.

Now suppose a downturn cuts EBITDA by 25%, to $150 million, with debt and interest expense unchanged.

3. New leverage. $1{,}200 / 150 = 8.0x$.
4. New coverage. $150 / 72 \approx 2.1x$.

A relatively modest 25% earnings decline pushed leverage up by two full turns and coverage down by 0.7x — this is exactly the kind of sensitivity analysis rating agencies and credit desks run before assigning a rating or pricing a spread, because leveraged balance sheets amplify ordinary earnings volatility into much larger swings in credit metrics.

What this means in practice

Rating agencies publish explicit leverage and coverage thresholds tied to rating bands, and covenant packages in loan agreements typically set maximum leverage and minimum coverage tests directly — breach either and the company can be in technical default even while still current on every interest payment.