Debt-to-capital ratio measures how much of a company's permanent capital structure is funded by debt rather than equity.
The debt-to-capital ratio measures what share of a company’s permanent capital comes from debt rather than equity.
It is a capital-structure ratio, and it is often easier to interpret than debt-to-equity because it is bounded between 0% and 100%.
If a company has:
total debt of $500 million
shareholders’ equity of $300 million
then:
That means 62.5% of total capital is debt financed.
The ratio answers a simple question:
How much of the company’s long-term financing mix comes from borrowing?
That matters because more debt usually means:
higher fixed obligations
greater refinancing exposure
less room for earnings shocks
But, as always, the correct interpretation depends on the business model and cash-flow stability.
These two ratios are closely related but not identical.
debt-to-equity ratio compares debt directly with equity
debt-to-capital compares debt with total permanent capital
Debt-to-capital is sometimes easier to compare across companies because it frames leverage as a percentage of the whole capital base rather than a multiple of equity.
A high debt-to-capital ratio usually means the company depends heavily on borrowing to finance its operations or asset base.
That may be reasonable for:
utilities
infrastructure businesses
other stable, asset-heavy companies
It may be more concerning for cyclical, speculative, or volatile businesses.
This ratio is balance-sheet based. It does not tell you:
whether earnings cover interest comfortably
whether the debt matures soon
whether the cash flow is resilient
That is why analysts pair it with measures such as the interest coverage ratio and cash flow to total debt ratio.
Debt-to-Equity Ratio: A closely related leverage metric using equity as the direct comparator.
Capital Structure: The broader framework for how a company is financed.
Interest Coverage Ratio: Measures whether earnings support the debt burden.
Cash Flow to Total Debt Ratio: Uses operating cash flow rather than capital mix.
Balance Sheet: The statement where debt and equity are reported.