Interest Coverage Ratio
Interest coverage answers 'can this company afford its debt payments?' A ratio of 3x+ is comfortable; below 1.5x and lenders start worrying.
Definition
The interest coverage ratio (ICR) measures how easily a company can pay interest on its outstanding debt from operating earnings. It divides EBIT (or EBITDA) by interest expense. A higher ratio means greater comfort paying interest; a ratio below 1.0x means the company cannot cover its interest from operations.
Formula
ICR = EBIT / Interest Expense
Interest Coverage Ratio
Can the company afford its interest payments?
EBIT
$120M
Interest Expense
$30M
Coverage
4.0x
At 4.0x, the company earns 4x its interest obligations. Comfortable, but a sharp EBIT decline of 75%+ would put interest payments at risk. Below 1.5x is where lenders start to worry.
Debt / EBITDA
How many years of earnings to pay off all debt?
Total Debt
$600M
EBITDA
$100M
Leverage
6.0x
At 6.0x, this company is firmly in leveraged territory. It would take 6 years of EBITDA to pay off all debt, assuming no CapEx or taxes. Typical of post-LBO capital structures.
Leverage Spectrum
Where different company types sit on the leverage scale
Google, Microsoft
GE, Honeywell
Post-buyout PE deals
Restructuring candidates
Leverage tolerance depends on cash flow stability. Tech companies with recurring revenue can carry less debt because investors value growth. LBOs load debt because the PE firm plans to pay it down from stable operating cash flows.
EBIT-Based vs. EBITDA-Based Coverage
The classic interest coverage ratio uses EBIT in the numerator. However, lenders frequently use EBITDA / Interest Expense because EBITDA better approximates cash available for interest payments (D&A is non-cash). Always clarify which version is being used. EBITDA-based coverage will always be higher than EBIT-based coverage.
Benchmarks by Credit Quality
Investment-grade companies typically maintain EBIT interest coverage of 4x–8x. High-yield/leveraged credits operate at 1.5x–3.0x. Below 1.0x means the company is burning cash to pay interest — a distress signal. Lenders include minimum interest coverage ratios as maintenance covenants in credit agreements, often set at 2.0x–3.0x.
Fixed Charge Coverage Ratio
A more comprehensive metric is the fixed charge coverage ratio (FCCR), which includes not just interest but also required principal repayments, lease payments, and preferred dividends. FCCR = (EBITDA - CapEx) / (Interest + Principal + Lease Payments). Lenders prefer FCCR because it captures all mandatory cash outflows, not just interest.
Worked Example — With Real Numbers
A company has EBIT of $150M and interest expense of $50M. ICR = $150M / $50M = 3.0x. Using EBITDA of $200M, the EBITDA-based coverage is $200M / $50M = 4.0x. If earnings decline 33% (EBIT falls to $100M), ICR drops to 2.0x — still covering interest but with much less cushion.
Key Takeaways
Interest coverage ratio measures the ability to pay interest from operating earnings
EBIT-based and EBITDA-based versions exist — always clarify which is being used
Investment-grade companies typically maintain 4x+ coverage; LBO targets are 1.5x–3.0x
It is commonly used as a maintenance covenant in credit agreements
Common Mistakes in Interviews
Not clarifying whether coverage uses EBIT or EBITDA — they give materially different answers
Ignoring that the ratio can deteriorate quickly if EBITDA is cyclical and interest is fixed
Forgetting about mandatory principal repayments — interest coverage alone does not capture full debt service
How Interviewers Test This
If asked 'how do you assess whether a company can service its debt?', start with Debt/EBITDA for leverage and interest coverage ratio for cash flow adequacy. Mention that the fixed charge coverage ratio is the most comprehensive measure.
Related Concepts
Directly referenced in this topic
Debt / EBITDA (Leverage Ratio)
Debt / EBITDA (also called the leverage ratio) measures how many years of operat...
EBITDA
EBITDA (Earnings Before Interest, Taxes, [Depreciation and Amortization](https:/...
Capital Structure
Capital structure refers to the specific mix of debt and equity a company uses t...
Debt Covenants
Debt covenants are contractual restrictions imposed by lenders in credit agreeme...
More Corporate Finance
23 more concepts in this category
Related Articles
Financial Ratios Cheat Sheet: Every Ratio You Need for IB Interviews
Comprehensive financial ratios cheat sheet for investment banking interviews: liquidity, profitability, leverage, efficiency, and valuation ratios with formulas.
Debt vs Equity Financing: What You Need to Know for IB Interviews
Understand the tradeoffs between debt and equity financing, how each affects WACC, the tax shield benefit, and key interview questions on capital structure.
Leveraged Finance Interview Guide: Questions & Prep Tips
Master leveraged finance interviews with this comprehensive guide covering credit analysis, debt capacity, coverage ratios, and the most common LevFin questions.
Topic Guides
Firms That Test This
Related Articles
Financial Ratios Cheat Sheet: Every Ratio You Need for IB Interviews
Comprehensive financial ratios cheat sheet for investment banking interviews: liquidity, profitability, leverage, efficiency, and valuation ratios with formulas.
Read articleDebt vs Equity Financing: What You Need to Know for IB Interviews
Understand the tradeoffs between debt and equity financing, how each affects WACC, the tax shield benefit, and key interview questions on capital structure.
Read articleLeveraged Finance Interview Guide: Questions & Prep Tips
Master leveraged finance interviews with this comprehensive guide covering credit analysis, debt capacity, coverage ratios, and the most common LevFin questions.
Read articlePractice Interest Coverage Ratio questions
400+ interview questions with AI feedback. Free to start.
Start PracticingMaster Interest Coverage Ratio and 100+ More Concepts
Get the full IB Flash experience and walk into your interview with confidence.
AI Interview Coach
Real-time feedback on your answers
1,000+ Practice Questions
Across IB, PE, HF, VC & more
Financial Modeling Tests
Excel-based skill assessments
Or explore our free tools to get started