Return on Equity (ROE): Definition, Examples, and How It Works
Return on Equity (ROE): Definition, Examples, and How It Works
Return on equity (ROE) measures how much profit a company generates per dollar of shareholder equity — expressed as a percentage. A 20% ROE means the company earns $20 for every $100 shareholders have invested. It is the primary measure of capital efficiency in fundamental analysis, and one of the most reliable long-run indicators of business quality. Warren Buffett has consistently cited 15% sustained ROE as the minimum threshold for businesses worth owning.
By Minalyst · April 9, 2026 · Updated: April 9, 2026
Table of Contents
- What Is Return on Equity (ROE)?
- ROE in Practice: The DuPont Decomposition
- How to Use ROE as an Investor
- Why ROE Matters for Investors
- When High ROE Is Misleading
- ROE by Industry
- Frequently Asked Questions
What Is Return on Equity (ROE)?
ROE measures how effectively management deploys the equity capital shareholders have entrusted to it — the definitive test of capital efficiency.
Formula:
ROE = Net Income ÷ Average Shareholders' Equity
Average shareholders' equity uses the beginning and end of the period: (Equity at start of year + Equity at end of year) ÷ 2. This smoothing matters because a company that repurchases stock heavily during the year would otherwise show a distorted ending equity figure.
Net income comes from the income statement. Shareholders' equity comes from the balance sheet — total assets minus total liabilities. Both are standard line items in any SEC filing.
A 15% ROE means that for every $100 of equity on the balance sheet, the business generates $15 in annual profit. Sustained over 5+ years, that compounding builds real wealth — each year's profits become the equity base generating next year's returns. A business that sustains 20% ROE reinvests profits into assets generating 20% returns — a compounding machine.
ROE in Practice: The DuPont Decomposition
ROE is not a single thing. It can be generated three different ways — and which way tells you more about the business than the number itself.
The DuPont framework decomposes ROE into three components:
ROE = Net Margin × Asset Turnover × Financial Leverage
Where:
- Net Margin = Net Income ÷ Revenue (profitability per dollar of revenue)
- Asset Turnover = Revenue ÷ Average Total Assets (how efficiently assets generate revenue)
- Financial Leverage = Average Total Assets ÷ Average Shareholders' Equity (how much debt amplifies returns)
Example: Two companies both report 20% ROE.
Company A: 20% net margin × 1.0 asset turnover × 1.0 leverage = 20% ROE. High-margin, no debt, pure business quality.
Company B: 5% net margin × 1.0 asset turnover × 4.0 leverage = 20% ROE. Mediocre margins, financed by 4x leverage. The 20% ROE is financial engineering — remove the debt, and ROE falls to 5%.
Same headline number. Fundamentally different businesses. The DuPont decomposition is why a single ROE figure without decomposition tells you almost nothing.
How to Use ROE as an Investor
ROE is a screening tool, not a buy signal. Use it in four steps to separate genuine business quality from financial engineering.
- Calculate the 5-year average ROE. A single year is noise. Five years removes the distortion of one-off events, buybacks, and accounting timing. A business consistently above 15% is doing something right.
- Run the DuPont decomposition. Split ROE into net margin × asset turnover × financial leverage. High ROE driven by leverage above 3x warrants scrutiny. High ROE driven by margins and asset efficiency is durable.
- Compare to direct sector peers. A 15% ROE in software is mediocre. A 15% ROE in utilities is strong. Context is the whole game — use Damodaran's industry averages as your baseline.
- Track the trend. Expanding ROE over three to five years signals improving business quality. Contracting ROE despite rising debt signals the company is borrowing to mask deterioration.
Pulling ROE and running the DuPont decomposition manually means opening the income statement, the balance sheet, calculating averages, and cross-referencing across multiple years. Minalyst compresses that mechanical extraction to seconds — so you start with the decomposition already built, not the data hunt.
Why ROE Matters for Investors
A sustained ROE above 15% identifies businesses that grow at above-market rates without requiring constant external capital — the defining characteristic of a compounding business.
Buffett's investment philosophy centers on this: a business that earns 15% on equity and reinvests those earnings at the same rate doesn't need debt or equity issuance to grow. It funds its own expansion from internal cash generation. Over 10–20 years, that differential in compounding rate becomes the entire gap between a good investment and an exceptional one.
Asset-light businesses achieve this most reliably. Consumer brands with strong pricing power (Coca-Cola historically runs 30–40% ROE). Software companies with low marginal cost per additional customer. Financial-services businesses with high capital turns. These are the sectors Buffett and Munger have systematically overweighted.
When High ROE Is Misleading
A high ROE is not automatically good. It can result from financial leverage rather than business quality — and the DuPont framework catches this immediately.
If a company has taken on significant debt to repurchase stock, equity shrinks. Even modest profits produce a high ROE. McDonald's consistently shows negative shareholders' equity from buybacks — its ROE calculation becomes technically infinite. That's not a compounding machine; that's balance sheet engineering.
The tell: when the financial leverage component of the DuPont decomposition (assets ÷ equity) exceeds 3–4x, question the quality of the ROE. High-margin businesses with minimal leverage, like Google (ROE ~35% TTM), earn that number the right way.
ROE by Industry
ROE benchmarks vary significantly by sector. Capital intensity, regulation, and business model determine what's achievable — not management quality alone.
| Industry | ROE Benchmark (Damodaran Jan 2026) |
|---|---|
| Semiconductor | ~31.4% |
| Software (System & Application) | ~29.6% |
| Drugs (Pharmaceutical) | ~24.0% |
| Machinery | ~16.4% |
| Retail (Grocery) | ~12.9% |
| Banks (Money Center) | ~12.9% |
| Oil/Gas (E&P) | ~12.2% |
| Utility (General) | ~10.4% |
A utility at 10% ROE isn't underperforming. Rate regulation caps returns by design. Compare ROE within sectors, not across them.
For a complete framework covering ROE alongside the 11 other key ratios — including how it interacts with leverage ratios — see the financial ratio analysis guide. The balance sheet guide shows exactly where shareholders' equity appears in the filing.
Related Terms
- Financial Ratio Analysis: The 12 Ratios That Matter — ROE in context with leverage and valuation ratios
- Understanding Balance Sheets — where shareholders' equity (ROE's denominator) is derived
- Income Statement Analysis — where net income (ROE's numerator) comes from
- EBITDA: Definition, Examples, and How It Works — the related operating profitability metric
Frequently Asked Questions
What is a good return on equity?
A ROE above 15% sustained over 5+ years is a reliable indicator of a high-quality business. Warren Buffett consistently cites 15% as the minimum threshold for businesses worth holding long-term. Asset-light businesses — software, consumer brands, financial services — routinely achieve 25–50% ROE. Capital-intensive businesses — utilities, heavy industrials, materials — typically run 8–12%, not because of poor management but because the business model requires substantial asset investment. Compare ROE to direct sector peers, not the broad market.
What is the DuPont analysis of ROE?
The DuPont framework breaks ROE into three components: net margin (profitability per dollar of revenue), asset turnover (revenue generated per dollar of assets), and financial leverage (assets relative to equity). ROE = Net Margin × Asset Turnover × Financial Leverage. This decomposition reveals whether a high ROE comes from genuine business quality (high margins, efficient asset use) or from financial engineering (heavy leverage amplifying mediocre returns). A 20% ROE from 5% margins and 4x leverage is fundamentally different from 20% ROE from 20% margins and no debt.
What is the difference between ROE and ROA?
Return on equity (ROE) measures profit relative to shareholder equity — how efficiently the company generates returns for owners. Return on assets (ROA) measures profit relative to total assets — how efficiently the company uses all capital, regardless of whether it's financed by debt or equity. ROA = Net Income ÷ Average Total Assets. Financial leverage doesn't affect ROA; it amplifies ROE. A company with the same ROA can have radically different ROE depending on its debt load. For comparing capital efficiency across companies with different capital structures, ROA is more useful than ROE.
Can a high ROE be misleading?
Yes. A high ROE can result from excessive financial leverage rather than business quality. If a company has very low equity (because it's paid out most earnings as dividends or done massive buybacks), even modest profits produce a high ROE. Companies that have taken on significant debt to buy back stock often show extremely high ROE — sometimes exceeding 100% — even with mediocre margins. The DuPont decomposition immediately reveals this: when the financial leverage component (assets ÷ equity) is very high, question the quality of the ROE number.
What is a typical ROE by industry?
Industry ROE benchmarks from Damodaran (January 2026): Software (System & Application) ~29.6%, Semiconductor ~31.4%, Drugs (Pharmaceutical) ~24.0%, Machinery ~16.4%, Retail (Grocery) ~12.9%, Oil/Gas (E&P) ~12.2%, Utility (General) ~10.4%, Banks (Money Center) ~12.9%. Technology and asset-light consumer businesses systematically achieve higher ROE than capital-intensive industries. These benchmarks shift with interest rates and business cycles — use trailing 5-year averages for a more stable comparison.