Return on Equity (ROE): Profitability Metric
Return on equity measures how efficiently a company generates profit from shareholder capital and is one of the most-watched indicators of business quality.
Return on Equity (ROE): Profitability Metric
Return on equity (ROE) measures how much profit a company generates for each dollar of shareholder capital. Warren Buffett reportedly considers sustained high ROE a hallmark of great companies. For traders, ROE separates businesses that compound capital efficiently from those that don't.
The formula
ROE = Net income ÷ Average shareholders' equity × 100
A company earning $10 million on $50 million of equity has a 20% ROE. Each dollar of capital generated 20 cents of profit.
How to interpret ROE
| ROE level | Interpretation |
|---|---|
| Below 5% | Low — capital not deployed well |
| 5–10% | Below average |
| 10–15% | Average for the broader market |
| 15–20% | Good, healthy returns |
| 20–30% | Excellent, efficient capital use |
| Above 30% | Exceptional — or leverage-inflated |
The S&P 500 long-term average is roughly 15%. Companies that consistently exceed 20% with low leverage are rare and valuable. ROE tells you whether the business compounds capital — a 25% ROE company can reinvest profits and double its equity base every three years, while a 5% ROE company takes 14 years.
The DuPont decomposition
ROE alone doesn't tell you why it's high. DuPont breaks it into three drivers:
ROE = Net profit margin × Asset turnover × Equity multiplier
A high ROE driven by margin and turnover is high quality. A high ROE driven by the equity multiplier is leverage — and leverage cuts both ways. ROIC (NOPAT ÷ invested capital) is often the cleanest measure because it strips out financing choices. ROE can be inflated by debt; ROIC cannot.
Reading in practice
- Compare to industry peers — relative matters more than absolute
- Check 5-year trend — consistency reveals quality
- Run DuPont — understand why ROE is high or low
- Pair with debt levels — high ROE + high debt is fragile
- Compare to cost of equity — ROE above ~8–10% creates value
Common mistakes
- Comparing ROE across sectors — banks and software aren't comparable
- Ignoring leverage — high ROE from debt isn't quality
- Treating buyback-boosted ROE as growth — fewer shares, not more profit
- Forgetting one-time items — a tax benefit inflates ROE for one year
- Using ending equity instead of average — average smooths mid-year changes
ROE is the headline quality metric. Pair it with DuPont, leverage, and the long-term trend to separate genuinely great businesses from those just looking the part.