Return on Equity (ROE)
$$\text{ROE} = \frac{\text{Net Income}}{\text{Shareholders' Equity}} \times 100$$
What is Return on Equity (ROE)?
Return on Equity (ROE) measures how many dollars of net income a company generates for each dollar of shareholders' equity. Shareholders' equity — also called book value — is the accounting value of assets minus liabilities: what would be left for equity holders if all assets were liquidated at book value and all debts paid. ROE converts this ownership stake into an efficiency ratio.
ROE is best understood through the DuPont decomposition, which breaks it into three multiplicative components: Net Profit Margin × Asset Turnover × Equity Multiplier. Net Profit Margin (Net Income / Revenue) shows profitability efficiency. Asset Turnover (Revenue / Total Assets) shows how productively assets generate revenue. The Equity Multiplier (Total Assets / Equity) reflects financial leverage — how much of the asset base is funded by debt.
This decomposition is analytically powerful because two companies can have identical ROE for very different reasons. A luxury goods company might achieve 20% ROE through high margins (40%) and low leverage. A bank might achieve the same 20% ROE through thin margins (5%) and extreme leverage (multiplier of 10x). The DuPont framework diagnoses the source of ROE and enables meaningful peer comparison.
When to use Return on Equity (ROE)
Use ROE to evaluate management's efficiency in deploying shareholder capital. A sustained ROE above 15–20% is generally considered excellent. For a more complete picture, always apply the DuPont decomposition to understand whether ROE is driven by profitability, operational efficiency, or financial leverage. Compare ROE to the company's cost of equity — an ROE below the cost of equity means the company is destroying value for shareholders.
Worked examples
| Company | Net Margin | Asset Turnover | Equity Multiplier | ROE (DuPont) | Primary Driver |
|---|---|---|---|---|---|
| Consumer brand | 18% | 1.2x | 2.0x | 43.2% | Margin |
| Retailer | 3% | 2.5x | 3.0x | 22.5% | Turnover + Leverage |
| Bank | 15% | 0.08x | 10x | 12% | Leverage |
| Industrial co. | 8% | 1.5x | 2.5x | 30% | Balanced |
Common pitfalls
High ROE driven by high leverage (large equity multiplier) can be misleading — the company is amplifying returns through debt, which also amplifies losses in downturns. A company with a $5M equity base and $100M in debt will show extreme ROE on any net income, but this capital structure carries significant bankruptcy risk. Always look at both ROE and the debt-to-equity ratio together.
Frequently asked questions
What is a good ROE?
A commonly cited benchmark is 15–20% as strong for established companies. Warren Buffett has noted a preference for businesses consistently achieving ROE above 20% without excessive leverage. The meaningful comparison is always industry-specific: banks operate with high leverage and thin margins, so 10–12% ROE is competitive. Capital-light software businesses should achieve 30%+ ROE.
What is the DuPont formula for ROE?
ROE = Net Profit Margin × Asset Turnover × Equity Multiplier, or equivalently: (Net Income / Revenue) × (Revenue / Total Assets) × (Total Assets / Equity). The extended 5-factor DuPont further decomposes Net Profit Margin into Tax Burden × Interest Burden × EBIT Margin, enabling even more granular analysis of what drives the difference in ROE between two companies.
Why can ROE be misleadingly high?
Three common distortions: (1) High leverage inflates ROE by shrinking the equity denominator — a company that borrows heavily will show high ROE even with mediocre profitability. (2) Share buybacks funded by debt reduce equity, which mechanically raises ROE without improving the underlying business. (3) Goodwill write-downs or large losses reduce equity permanently, which paradoxically raises future ROE calculations on the remaining smaller equity base.