What Is the Interest Coverage Ratio? Formula and Meaning

By Markets & Investing DeskUpdated Nov 10, 2026

Definition

The interest coverage ratio shows how many times a company's operating earnings can pay its interest expense, calculated as EBIT divided by interest expense for the same period.

Key takeaways

A ratio below 1 means operating earnings did not cover the interest bill for the period.
Lenders may see coverage around 1.5 or lower as a high default risk and decline credit or charge more.
Lenders may expect at least about 3x in cyclical industries such as manufacturing, while utilities can run lower.
The ratio ignores principal repayments, so a large maturing loan can strain a company with healthy coverage.

The interest coverage ratio measures how many times a company’s operating earnings can pay the interest on its debt during a given period. In its standard form, you divide earnings before interest and taxes (EBIT) by interest expense for the same period. A result of 5 means the company earned five times what it owed in interest. A result below 1 means its earnings did not cover the interest bill at all.

The measure is also called the times interest earned (TIE) ratio, and in British usage, interest cover. All three names refer to the same calculation. Lenders, bond investors and equity analysts use it as a quick test of solvency: can the business carry its current debt, and can it take on more?

Interest Coverage Ratio Formula

Interest coverage ratio = EBIT ÷ Interest expense

EBIT is operating profit before interest and income taxes are deducted. Interest is excluded because it is the obligation being tested. Taxes are excluded because interest is generally paid before taxable income is calculated.
Interest expense is the interest cost charged for the period on loans, bonds, credit lines and other borrowings.

The two inputs must cover the same length of time: quarterly EBIT needs quarterly interest. Mixing an annual numerator with a quarterly denominator makes the ratio four times too high.

Earnings variations

Analysts sometimes swap the numerator:

EBITDA coverage adds back depreciation and amortization, so it always produces a ratio at least as high as the EBIT version. It is closer to a cash view, but it ignores that worn-out assets eventually have to be replaced.
EBIAT coverage uses earnings before interest but after taxes, giving a more conservative reading of what is actually available to pay interest.

When you compare two companies, or one company across several years, use the same variation each time.

Worked Example

Hypothetical manufacturer, one fiscal year, for illustration only:

Revenue: $10,000,000
Operating expenses, including depreciation: $8,200,000
EBIT: $1,800,000
Depreciation and amortization: $400,000
Interest expense: $450,000

EBIT coverage: $1,800,000 ÷ $450,000 = 4.0×

EBITDA coverage: ($1,800,000 + $400,000) ÷ $450,000 = 4.9×

Now suppose revenue falls and EBIT drops to $600,000 while interest stays at $450,000. The ratio falls to 1.33×, leaving only $150,000 of operating profit after interest, before taxes. A 67% drop in EBIT cut coverage by the same proportion, because the fixed interest bill did not shrink.

How to Interpret the Ratio

Above 1: Earnings exceed interest. The larger the multiple, the more earnings can fall before interest goes unpaid.

Around 1.5 or lower: Lenders may treat this as a high default risk and decline further credit, or lend only at a higher interest rate.

Below 1: Current operating earnings do not cover interest. The company has to draw on cash reserves, sell assets or borrow more to meet the shortfall.

Zero or negative: If EBIT is zero, the ratio is zero. An operating loss produces a negative ratio. If a company has no interest expense, the ratio cannot be calculated, which simply means it has no interest burden to cover.

What is a good interest coverage ratio?

No single threshold applies to every company. Regulated utilities tend to have steady, predictable revenue, so they can reliably service debt even at relatively low coverage. Earnings in industries such as manufacturing swing more with the economic cycle, and lenders may expect a minimum of about 3× there. The useful benchmark is a peer with a similar business model and revenue scale, not a universal number.

How Lenders and Investors Use It

Banks and bond buyers use coverage to decide whether to lend, how much and at what rate. Some will accept a weaker ratio in exchange for a higher rate. Loan agreements often include a minimum coverage level as a covenant, and falling below it can trigger penalties or a default.

Equity investors look at the trend more than at any single reading. Tracking the ratio quarter by quarter over several years shows whether the debt load is becoming easier or harder to carry. Thin coverage may force a company to spend cash it would otherwise invest or hold for emergencies. Rising interest rates matter too: when borrowing costs go up, coverage can fall even if earnings hold steady, reducing a company’s capacity to borrow, invest and hire.

Limitations

Period-specific. One quarter or year can be distorted by seasonal sales or a one-off gain or charge.
Interest only. The ratio ignores principal repayments, so a company with healthy coverage can still struggle if a large loan matures.
Earnings are not cash. EBIT includes non-cash and accrual items, so a solid ratio does not guarantee cash is on hand when payments are due.
Selective debt. A company’s own published coverage figure may leave some debts out. Check that every borrowing is included.
Capitalized interest. Interest on construction or long-term projects can be capitalized instead of expensed, lowering reported interest expense and making coverage look stronger than it would using total interest incurred.

Debt service coverage ratio (DSCR): This ratio compares earnings or operating cash flow with total debt service, meaning interest plus principal. Because the denominator is larger, DSCR is a stricter test than interest coverage.

Interest service coverage ratio (ISCR): This is a lender-oriented measure that typically starts from profit after tax and adds back depreciation and interest, then divides by interest. Definitions vary by lender. If you compare an ISCR with an EBIT-based interest coverage ratio, check how each one is constructed first.

Interest burden ratio: Used in DuPont analysis, this is pretax income ÷ EBIT. It shows the share of operating profit that remains after interest. It is related to coverage, but it is expressed as a fraction (for example 0.75) rather than a multiple.

Leverage ratios: Debt-to-equity and debt-to-EBITDA measure how much debt a company carries; interest coverage measures whether it can afford what that debt costs. Modest debt at a high rate or heavy debt at a low rate can make the two kinds of ratio point in different directions.

FAQs

Should finance costs or total interest charges be used in the denominator?

Use the full interest cost of all borrowings for the period. "Finance costs" on an income statement can include items such as fees or lease interest, and capitalized interest is sometimes left out, so check the notes to the accounts and apply the same definition every time you compare.

The Bottom Line

Lenders, bond investors and equity analysts use interest coverage to judge whether a business can carry its debt and take on more. The most useful readings compare a company with similar peers and track the trend over several years using one consistent formula. Check that all debt and capitalized interest are counted, and read the ratio alongside cash flow and principal obligations.