Return on Equity (ROE) Calculator
Created by: Ethan Brooks
Last updated:
Calculate return on equity from net income and shareholders' equity. Enter optional revenue and total assets to unlock the full DuPont decomposition into net profit margin, asset turnover, and equity multiplier.
Return on Equity (ROE) Calculator
FinanceMeasure how efficiently shareholders' investment generates profit — with optional DuPont decomposition into margin, asset turnover, and leverage.
What is a Return on Equity (ROE) Calculator?
A return on equity calculator measures how much profit a company generates relative to the equity shareholders have invested.
By dividing net income by shareholders' equity, it produces a percentage that reflects how effectively management is deploying capital.
ROE is one of the most widely used profitability ratios in fundamental analysis.
Investors use it to compare companies within the same industry, track management effectiveness over time, and identify businesses that consistently create value for shareholders.
Combined with DuPont analysis, it separates genuine operational performance from leverage-amplified returns.
The DuPont decomposition splits ROE into three multiplicative components: net profit margin (profit per dollar of revenue), asset turnover (revenue per dollar of assets), and equity multiplier (assets per dollar of equity).
A company can achieve a high ROE through any combination — superior margins, efficient asset use, or financial leverage.
Understanding which driver is at work determines whether the ROE is sustainable.
How ROE Is Calculated
The basic formula divides net income by shareholders' equity.
This calculator also accepts revenue and total assets to compute the three-factor DuPont breakdown.
Net profit margin = net income / revenue.
Asset turnover = revenue / total assets.
Equity multiplier = total assets / shareholders' equity.
Multiplying all three gives ROE.
The DuPont approach is powerful because each component has a different strategic lever.
Net profit margin improves through pricing power or cost reduction.
Asset turnover improves through operational efficiency or asset-light business models.
The equity multiplier reflects the capital structure decision — using more debt raises the multiplier and amplifies ROE, but also increases risk.
ROE formulas
ROE = net income / shareholders' equity × 100
DuPont ROE = net profit margin × asset turnover × equity multiplier
Net profit margin = net income / revenue × 100
Asset turnover = revenue / total assets
Equity multiplier = total assets / shareholders' equity
Example Scenarios
Example 1: High-margin software company
Net income: $30M, Revenue: $100M, Total assets: $80M, Equity: $60M. Net margin = 30%, Asset turnover = 1.25, Equity multiplier = 1.33. ROE = 30% × 1.25 × 1.33 = 50%. High ROE driven by margins and moderate asset efficiency — not leverage.
Example 2: Leveraged retailer
Net income: $20M, Revenue: $500M, Total assets: $300M, Equity: $50M. Net margin = 4%, Asset turnover = 1.67, Equity multiplier = 6.0. ROE = 40%. Same ROE as a high-margin company, but driven almost entirely by leverage. The 6× equity multiplier signals high debt and financial risk.
Example 3: Capital-intensive utility
Net income: $100M, Equity: $800M. ROE = 12.5%. This looks modest, but for a regulated utility with stable, predictable cash flows and a 5–7% cost of capital, a 12.5% ROE represents genuine value creation.
How People Use This Calculator
- Compare management effectiveness across companies in the same industry by benchmarking ROE against sector medians.
- Use DuPont analysis to identify whether high ROE is driven by genuine margin and efficiency improvements or by increasing financial leverage.
- Track ROE trends over multiple years to evaluate whether a company's competitive advantage is strengthening or eroding.
- Screen for consistently high-ROE businesses as a starting point for fundamental investment analysis.
- Evaluate the impact of share buybacks on ROE — buybacks reduce equity and mechanically raise ROE, which is why DuPont context matters.
Tips for ROE Analysis
Compare ROE to the cost of equity (CAPM-estimated).
If ROE exceeds the cost of equity, the company is creating value for shareholders.
If it falls short, the business is destroying value even while appearing "profitable."
Watch for ROE improvements driven by the equity multiplier.
A rising D/E ratio will inflate ROE even if underlying margins and efficiency are flat.
Always check interest coverage alongside ROE to ensure the leverage is sustainable.
Use a 5- or 10-year average ROE rather than a single year's figure.
One-time charges, accounting adjustments, or lucky commodity cycles can distort a single period.
Consistent ROE above 15% over a decade is a much stronger quality signal.
Frequently Asked Questions
What is return on equity (ROE)?
Return on equity (ROE) measures how efficiently a company uses shareholders' investment to generate profit. It divides net income by average shareholders' equity and expresses the result as a percentage. An ROE of 15% means the company earns 15 cents of profit for every dollar of equity invested by shareholders.
What is a good return on equity?
A good ROE varies by industry, but 15–20% is generally considered strong for most businesses. Warren Buffett looks for companies that consistently achieve ROE above 15% without excessive leverage. Capital-light businesses (software, financial services) often exceed 20–30%, while capital-intensive sectors (utilities, manufacturing) may achieve 8–12% and still be considered well-run.
What is the DuPont formula for ROE?
The DuPont decomposition breaks ROE into three components: net profit margin (how much of each revenue dollar becomes profit), asset turnover (how efficiently assets generate revenue), and equity multiplier (financial leverage — total assets divided by equity). ROE = net profit margin × asset turnover × equity multiplier. This breakdown reveals which driver — profitability, efficiency, or leverage — is producing the ROE.
Can a high ROE be misleading?
Yes. A high ROE can result from high financial leverage (lots of debt shrinks the equity denominator) rather than genuine operational excellence. A company with a D/E ratio of 4.0 will mechanically show a much higher ROE than a similar company with no debt. That is why DuPont analysis is valuable — it distinguishes ROE driven by real margin and efficiency from ROE inflated by leverage.
Should I use beginning or average equity?
Best practice is to use average equity — the average of beginning-period and end-period shareholders' equity. This smooths the ratio when equity changes significantly during the year due to retained earnings, share issuances, or buybacks. For simplicity, many quick-reference calculations use ending equity, which is acceptable for back-of-envelope analysis.
How does ROE relate to ROA?
ROE is always higher than ROA for a company using debt financing, because the equity base is smaller than the asset base. The gap between ROE and ROA is driven by leverage: ROE = ROA × equity multiplier. If ROE and ROA are nearly identical, the company uses almost no debt. A large gap between them signals significant financial leverage.
Sources and References
- Damodaran, A. (2012). Investment Valuation. John Wiley & Sons.
- CFA Institute. (2023). Financial Reporting and Analysis. CFA Program Curriculum.
- Penman, S.H. (2013). Financial Statement Analysis and Security Valuation. McGraw-Hill Education.