Debt-to-equity
Ratio of total debt to shareholders' equity.
The debt-to-equity ratio (D/E) measures a company's financial leverage: how many units of debt exist for every unit of shareholder equity. A D/E of 1.0 means that for every dollar of equity, the company carries one dollar of debt. A D/E of 3.0 means debt is three times equity — higher leverage.
Leverage amplifies both returns and risks. In positive phases, an indebted company can generate much higher returns on equity (the leverage effect); in negative phases, debt is a fixed cost that erodes margins and — in extreme cases — leads to bankruptcy. The optimal D/E therefore varies radically by sector: a D/E above 8 for a bank is normal (debt is the raw material of the business), while a D/E of 8 for a retailer would be alarming.
Worked example
Apple (AAPL) on May 17, 2026, carries a D/E of roughly 1.8: for every $1 of equity, it holds ~$1.80 of debt. This is not a liquidity crisis — Apple holds over $50 billion in cash. The debt is structural, used to fund buybacks and dividends with cheap borrowed money rather than with generated cash.
Ferrari (RACE) has a D/E of approximately 1.2 — moderate for a luxury goods business with exceptional pricing power and inelastic demand. Commercial banks like JPMorgan carry D/E above 8–10: in their case, 'debt' is customer deposits, the raw material of their lending activity. Comparing a bank's D/E with a tech company's D/E without sector context is meaningless.
When it's used
D/E is primarily used to assess balance sheet risk. First, identifying companies with a resilient financial structure (low D/E) versus those dependent on the credit cycle. Second, comparing leverage among companies in the same sector: the one with a lower D/E than peers typically has more flexibility to invest or withstand a downturn. Third, evaluating the impact of rising interest rates: companies with high D/E and floating-rate debt see their cost of debt rise quickly in tightening cycles.
Limits
The balance sheet D/E measures financial debt, but off-balance-sheet liabilities (operating leases, unfunded pension obligations) can be material. Some analyses prefer Net Debt/EBITDA, which includes cash and normalizes for cash generation capacity. D/E is also a point-in-time snapshot: a company can move from D/E 1.0 to D/E 3.0 within 12 months following an acquisition.
Frequently asked
How much is 'too much' for D/E?
There is no universal threshold. Consumer staples and tech often run below 1.0. Industrials 1.0–2.0. Utilities and real estate 2.0–5.0. Banks above 8. The right question is: is this company's D/E in line with its sector norm, and does it have the FCF capacity to service its debt?
Can D/E be negative?
Yes: when shareholders' equity is negative (more liabilities than assets). This is technically insolvent, but some companies maintain it intentionally — McDonald's ran negative equity for years via massive buybacks that eroded equity without compromising cash generation.
D/E or Net Debt/EBITDA: which is more useful?
D/E for gross balance sheet strength. Net Debt/EBITDA for debt sustainability relative to cash generation capacity. Credit analysts almost always use the latter: a company with a high D/E but a Net Debt/EBITDA of 1.5 is far more comfortable than one with a low D/E but a Net Debt/EBITDA of 8.
Related terms
Educational definition. Not financial advice.