Debt can help a company grow faster, but too much of it can sink a business when sales slow or interest rates rise. The debt-to-equity ratio is the standard first check of how much a company relies on borrowing.
The formula
Debt-to-equity (D/E) = total debt ÷ shareholders' equity
A company with $4 billion of debt and $8 billion of equity has a D/E of 0.5. Both numbers come from the balance sheet. Some sources use total liabilities instead of total debt, which gives a higher figure, so make sure you compare like with like.
How to read it
- Below 0.5: relatively little debt; a conservative balance sheet.
- Around 1: debt and equity are roughly equal.
- Above 2: heavy reliance on debt. Not automatically bad, but the business needs steady cash flow to support it.
These are rough guides. What's normal varies a lot by industry. Utilities, telecoms and real estate companies have stable cash flows and often carry high debt. Software companies frequently have little or none. Banks are a special case and are analyzed with different measures entirely.
Why it matters
Debt magnifies results in both directions. In good times it can boost return on equity. In bad times interest payments still have to be made, which can force a company to cut its dividend, sell assets or raise money on poor terms. Highly indebted companies also tend to be more sensitive to rising interest rates.
Other debt measures to check
- Net debt = total debt − cash. A company with lots of cash may be in better shape than its D/E suggests.
- Net debt to EBITDA: how many years of operating earnings it would take to pay off the debt. Many investors get cautious above about 3 to 4.
- Interest coverage = operating income ÷ interest expense. Low coverage means interest eats much of the profit.
- Current ratio = current assets ÷ current liabilities, a check on short-term bills.
Watch out for negative equity
Some profitable companies have negative shareholders' equity, usually because they've spent heavily on share buybacks. Their D/E ratio becomes meaningless, so use net debt to EBITDA and interest coverage instead.
Debt measures feed the Financial Health pillar of the StockEngine Score in AI Insights. You can review five years of balance sheets on any stock page and compare companies in the compare tool. For the full research process, see how to analyze a stock.
This article is educational and not investment advice.
StockEngine articles are for education only and are not investment advice. Some links may be affiliate links.