Return on Equity Calculator
Calculates how much profit a company generates for each dollar of shareholder equity. Investors use it to gauge management's effectiveness at growing equity value.
About this calculator
Return on Equity (ROE) is one of the most widely cited profitability metrics in equity analysis. It answers the question: how efficiently is management using the money shareholders have invested? The formula is: ROE = (Net Income / Average Shareholder Equity) × 100. Average Shareholder Equity is calculated as the mean of beginning and ending equity for the period. A consistently high ROE — typically above 15% — signals strong management performance and competitive advantage. The DuPont framework further breaks ROE into net profit margin, asset turnover, and financial leverage, revealing the exact driver of changes in ROE. Be cautious: high ROE driven by excessive debt can be misleading.
How to use
Imagine a company earned a net income of $800,000 last year. Shareholder equity was $4,000,000 at the beginning of the year and $4,800,000 at the end, giving an average of $4,400,000. Apply the formula: ROE = ($800,000 / $4,400,000) × 100 = 18.18%. This means management generated an 18.18% return on every dollar of equity invested. Enter your net income and average shareholder equity above to calculate your ROE immediately.
Frequently asked questions
What is considered a good return on equity for investors?
Most investors look for an ROE of at least 15%, as this suggests the company is generating meaningful returns above the cost of equity. Warren Buffett famously favors companies with ROE consistently above 15% over a ten-year period as a sign of durable competitive advantage. However, what counts as 'good' depends heavily on the industry — financial firms often target 10–12%, while technology companies can exceed 30%. Comparing a company's ROE to the industry median is the most reliable benchmark.
How can a company have a high ROE but still be financially risky?
ROE can be inflated artificially through financial leverage — borrowing heavily reduces shareholder equity on the balance sheet, which mathematically boosts ROE even without improved profitability. A company that has bought back large amounts of stock using debt can show a very high or even negative equity figure, making ROE look spectacular while hiding fragility. This is why analysts always examine the debt-to-equity ratio alongside ROE. The DuPont decomposition is the standard tool for identifying whether a high ROE stems from genuine efficiency or risky leverage.
Why do analysts use average shareholder equity instead of ending equity in ROE calculations?
Net income is earned continuously throughout the year, but shareholder equity changes at discrete points due to retained earnings, dividends, and share issuances. Using only the year-end equity figure can understate or overstate the equity base that was actually available to generate income. Averaging the opening and closing equity balances creates a more representative denominator that matches the time-weighted nature of income generation. For businesses with highly volatile equity — such as those paying large special dividends mid-year — analysts may use quarterly equity averages for greater accuracy.