Debt Ratios
Learn key debt ratios (net debt/EBITDA, interest coverage, debt/equity) and how to interpret them by sector. Includes diagrams, checklist and FAQs.
How Debt Ratios Reveal Hidden Risk in Seemingly Healthy Companies
Debt ratios measure a company's financial leverage — how much of its operations are funded by borrowing versus equity. Key ratios include debt-to-equity (total debt divided by shareholder equity), interest coverage (EBIT divided by interest expense), and net debt-to-EBITDA. High debt is not inherently bad — leverage can amplify returns during good times. But during economic downturns, high debt becomes dangerous as revenues fall while interest payments remain fixed. For traders, rising debt ratios in a company or sector signal increasing fragility. The interest coverage ratio is particularly important: below 2x means the company barely earns enough to cover interest payments, creating bankruptcy risk.
Practical Example
Company X has a debt-to-equity ratio of 2.5 and interest coverage of 1.8x. Revenue has been flat for two years. A trader recognises that one bad quarter could push interest coverage below 1.0x, potentially triggering debt covenant violations and a credit downgrade. This creates a short opportunity — particularly if the market is focused on the company's stable revenue without considering the leverage risk. When the next economic slowdown hits and revenue drops 10%, the company's share price falls 40% as debt concerns dominate.
Table of contents
What debt ratios measure
Debt ratios measure how much financial leverage a company uses and how resilient it is to downturns or rate increases.
Debt can increase equity returns in good times, but it also increases fragility if cash flows weaken or refinancing costs rise.
Two-panel market map (leverage + coverage)
Panel 1 highlights leverage ratios such as net debt/EBITDA. Panel 2 highlights coverage ratios such as EBIT/interest, which are crucial when rates rise or debt rolls over.
The core ratios to know
Common ratios include:
- Net debt / EBITDA: leverage versus operating cash generation
- Interest coverage (EBIT/interest): ability to pay interest from operations
- Debt / equity: capital structure (less useful across sectors)
- Net debt / free cash flow: ‘how many years to repay’ lens
Always consider maturity profile and covenants alongside ratios.
How to interpret debt ratios correctly
Interpretation depends on sector and cash stability:
- Utilities and infrastructure can support higher leverage due to steady cash flows.
- Cyclicals often need lower leverage because earnings swing.
- Banks and insurers require different leverage frameworks.
Also adjust for leases and off-balance-sheet obligations where relevant.
Common mistakes
- Using the same leverage threshold across all sectors.
- Ignoring refinancing timing (maturity walls).
- Trusting EBITDA without checking capex needs and working capital.
- Missing that ‘net debt’ depends on cash classification and liquidity quality.
FAQ
What is the most common leverage ratio?
Net debt/EBITDA is widely used, but it should be paired with interest coverage and free cash flow analysis.
Why can EBITDA be misleading?
It excludes capex and working capital. A business can have high EBITDA but low free cash flow.
Does low debt always mean a safer company?
Not always. Business risk, cash volatility and liquidity can still be high even with low leverage.
Summary
- Corporate analysis focuses on revenue, margins, cash flow, and balance sheet strength.
- Compare results to expectations (guidance, forecasts, and surprises) to gauge sentiment.
- Use valuation models as a framework and manage risk around earnings volatility.
Last updated: 2025-12-28 (UK time).