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What Is the Interest Coverage Ratio? Formula and Example
The interest coverage ratio shows how comfortably operating profit pays a company's interest bill. See the formula, a worked example and a safe level.
Interest coverage ratio in 60 seconds
- The interest coverage ratio shows how many times a company's operating profit covers its interest bill.
- Formula: EBIT ÷ interest expense.
- Below about 1.5 is a warning sign; above 3 is usually comfortable — though cyclical businesses need a bigger cushion.
Educational summary — not investment advice.
Debt is only dangerous if you cannot service it. The interest coverage ratio measures exactly that: how easily a company's operating profit pays its interest.
A company that earns 5 times its interest bill can absorb a bad year. One that only just covers it is one weak quarter away from trouble.
How is Interest coverage ratio calculated?
| Measure | Formula |
|---|---|
| Interest coverage ratio | EBIT ÷ Interest expense |
| EBITDA-based version | EBITDA ÷ Interest expense |
EBIT is operating profit before interest and tax. Use the same period for both figures — the last financial year, or the last four quarters.
Interest coverage ratio example with numbers
| Item | Value |
|---|---|
| EBIT | ₹300 crore |
| Interest expense | ₹60 crore |
| Interest coverage | 5.0x |
| If a downturn cut EBIT to | ₹90 crore |
| Interest coverage then | 1.5x |
Today EBIT covers interest 5.0x, a comfortable cushion. But if a downturn cut EBIT to ₹90 crore, coverage would fall to 1.5x — still positive but with very little room. Stress-testing the ratio like this shows how fragile a balance sheet really is.
Example Ltd — illustrative figures. Interest does not shrink when profit does.
How to read it
- Below 1: the company does not earn enough to pay its interest and must use cash, sell assets or borrow more.
- 1 to 1.5: fragile — any dip in earnings is a problem.
- Above 3: usually comfortable for stable businesses.
- Cyclical sectors (metals, real estate, infrastructure) need higher coverage because profits swing.
Use it with debt-to-equity
The debt-to-equity ratio tells you how much is owed; interest coverage tells you whether the earnings can carry it. A company with modest debt but collapsing profits can be in more danger than one with heavy debt and stable cash flows, so look at both together and watch the trend.
The margin of safety on borrowing
Lenders do not care how exciting a company's story is. They care about one thing: will the interest be paid, every quarter, on time? Interest coverage measures that directly. It tells you how many times a company's operating profit could pay its annual interest bill.
A company with coverage of 8 could see its profit fall by more than 85% and still pay the interest. One with coverage of 1.2 can barely afford a poor quarter. This margin of safety is why credit rating agencies and bank credit officers give the ratio so much weight, and why it deserves a place in every investor's checklist.
Calculating it, with variations
| Measure | Formula |
|---|---|
| Interest coverage (EBIT) | Operating profit before interest and tax ÷ finance costs |
| EBITDA coverage | EBITDA ÷ finance costs; more generous, because depreciation is added back |
| Debt service coverage ratio (DSCR) | (Net profit + depreciation + interest) ÷ (interest + principal repayments due) |
Consider a company with EBIT of ₹300 crore and finance costs of ₹60 crore: interest coverage is 5 times. For DSCR, suppose net profit is ₹120 crore, depreciation ₹80 crore, interest ₹60 crore and principal repayments due this year ₹100 crore. Cash available is 120 + 80 + 60 = ₹260 crore; obligations are 60 + 100 = ₹160 crore; DSCR is 260 ÷ 160 = 1.6 times. Interest coverage looks only at interest; DSCR also includes the repayment of the loan itself, so it is the harsher test.
Stress-testing the ratio
The most useful thing to do with coverage is ask what happens if profit falls. Take a company with EBIT of ₹300 crore and interest of ₹60 crore:
| Fall in EBIT | Interest coverage |
|---|---|
| None | 5.0 times |
| 20% | 4.0 times |
| 40% | 3.0 times |
| 60% | 2.0 times |
| 80% | 1.0 times: interest is only just covered |
This company can absorb a very large drop in profit. Now imagine coverage of 1.5 at the start: a fall of one-third takes it to 1.0, and the company has nothing left for tax, capex or repayments. Coverage tells you how big a mistake or a downturn the company can survive.
Interest rates and floating-rate debt
In India, the interest a company pays on floating-rate loans follows benchmark rates, which move with the RBI's policy rate. If rates rise, the interest bill rises even though nothing about the business has changed.
Suppose the company above has floating-rate debt of ₹600 crore and rates rise by 2 percentage points. Interest rises by 600 × 2% = ₹12 crore, from ₹60 crore to ₹72 crore, and coverage falls from 5.0 to 300 ÷ 72 = 4.2 times. For a company with thin coverage, the same rate rise can be the difference between comfortable and distressed. Check how much of the borrowing is fixed-rate versus floating.
Reading the ratio by business type
| Business type | How much coverage is comfortable |
|---|---|
| Stable, predictable earnings (utilities, consumer staples) | Around 3 times or more is usually fine. |
| Cyclical businesses (metals, cement, shipping, real estate) | Look for a higher level, since profit can collapse in a downturn. |
| Infrastructure with contracted revenue | Lower coverage may be acceptable if cash flows are secured by long contracts, but check repayment schedules. |
| Banks and NBFCs | Not applicable; interest is the business. |
Warning signs
- Coverage that has fallen for several years even though sales are growing.
- Interest being paid from new borrowing rather than from operating cash flow.
- A credit rating downgrade from agencies such as CRISIL, ICRA or CARE.
- High promoter pledging together with weak coverage.
- Interest costs being capitalised — added to the cost of assets instead of being charged to profit — which flatters coverage.
Test yourself
- Question 1. EBIT ₹120 crore, interest ₹30 crore. Coverage? Answer: 4 times.
- Question 2. EBIT falls 50%. New coverage? Answer: 2 times.
- Question 3. Debt of ₹400 crore at floating rates; rates rise 1.5 percentage points. Extra annual interest? Answer: 400 × 1.5% = ₹6 crore.
- Question 4. Cash available for debt service is ₹200 crore and obligations are ₹125 crore. DSCR? Answer: 1.6 times.
Read coverage together with debt-to-equity for how much is owed and free cash flow for how much cash the business really generates.
On NSE and BSE: what to keep in mind
- Interest rates in India move with the RBI's policy rate, so a company with floating-rate borrowings sees its interest bill change when the RBI changes rates.
- Rating actions by agencies such as CRISIL, ICRA and CARE often follow weak coverage — a downgrade is worth noticing.
- The ratio does not apply to banks, whose interest is part of the business.
Interest coverage ratio: frequently asked questions
What is a good interest coverage ratio?
Around 3 or more is generally seen as comfortable, and above 5 as strong, but stable businesses can manage with less and cyclical ones need more.
Why use EBIT and not net profit?
Net profit is already after interest, so it would understate the earnings available to pay it. EBIT shows the profit before interest is deducted.
Does a zero-debt company have an interest coverage ratio?
Not meaningfully — with no interest expense there is nothing to cover, and data sites show it as N/A.
Disclaimer: this article is for education only. The figures in the worked example are illustrative and do not describe any real company listed on NSE or BSE. It is not investment advice, and investingg.in is not a SEBI-registered advisor.
The bottom line
Interest coverage tells you whether debt is a comfortable burden or a looming problem. Whenever you see borrowing on a balance sheet, check that earnings cover the interest with room to spare.
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Disclaimer: This analysis is for educational purposes only and should not be considered investment or trading advice. Please consult your financial advisor before making investment decisions.