What is Return on Equity?
Return on Equity (ROE) measures how much profit a company generates for each dollar of shareholders' equity:
ROE = Net Income ÷ Shareholders' EquityIf a company earns $200M and shareholders' equity is $1B, ROE is 20%. Management turned every dollar of equity into 20 cents of profit.
Warren Buffett has cited consistently high ROE — without relying on excessive leverage — as one of the clearest signals of a business with durable competitive advantages.
What ROE tells you about a business
ROE reflects two things simultaneously: the underlying quality of the business model and management's capital allocation skill.
A business with a strong moat — brand power, network effects, switching costs, cost advantages — can earn high returns on equity sustainably. A commodity business competing purely on price will earn low ROE because competition drives margins to zero.
Consistently high ROE over 10 years says: this company has something competitors can't easily replicate.
The debt problem with ROE
ROE has one serious flaw: leverage inflates it. Consider two companies:
- Company A: $100M assets, $80M equity, $20M debt. Earns $15M net income → ROE 18.75%
- Company B: $100M assets, $20M equity, $80M debt. Earns $15M net income → ROE 75%
Same assets, same earnings — but Company B looks 4× better by ROE because it's far more leveraged. In good times, this works. In bad times, the debt becomes crushing. Always pair ROE with Debt/Equity to distinguish genuine quality from leveraged illusion.
DuPont analysis: decomposing ROE
DuPont analysis breaks ROE into three drivers:
ROE = Net Profit Margin × Asset Turnover × Equity Multiplier- Net profit margin: How much of each revenue dollar becomes profit. Luxury brands and software score high. Groceries and airlines score low.
- Asset turnover: How efficiently assets generate revenue. High for retailers (low margins, fast inventory turns). Low for utilities (capital-heavy, slow revenue).
- Equity multiplier: Assets ÷ Equity = leverage factor. Higher = more debt.
A software company might have high margin, moderate turnover, and low leverage → ROE 25%. A retailer might have low margin, very high turnover, and moderate leverage → also ROE 25%. They look the same in the top line, but the quality of that ROE is very different.
Return on Invested Capital (ROIC): the better metric?
Many analysts prefer ROIC over ROE because it includes all capital (equity + debt), removing the leverage distortion:
ROIC = NOPAT ÷ Invested CapitalWhere NOPAT is Net Operating Profit After Tax and Invested Capital is equity + interest-bearing debt.
A company generating 20%+ ROIC consistently is exceptional — it earns well above the typical cost of capital (8–12%) and creates substantial shareholder value.
ROE in our Quality factor
Our StockSignal24 Quality score uses trailing 3-year average ROE alongside profit margin and debt-to-equity ratio. This averaging smooths out one-time fluctuations and rewards companies with genuinely sustainable returns. Search any stock to see its Quality factor breakdown.
Key takeaways
- ROE = Net income ÷ Shareholders' equity. Higher is generally better.
- Consistently high ROE (15%+) signals competitive advantage.
- High leverage artificially inflates ROE — always check debt levels alongside.
- DuPont analysis reveals whether ROE is driven by margin, efficiency, or leverage.
- ROIC is more reliable than ROE for comparing companies with different capital structures.