Return on Equity Calculator
Returns per pound of equity.
Calculate Return on Equity from net income and shareholders' equity — the headline profitability metric for a business owner.
What this tool does
Return on Equity (ROE) measures how efficiently a business generates profit from the money invested by shareholders. It divides net income by shareholders' equity and expresses the result as a percentage. This calculator takes your net income and shareholders' equity figures and computes ROE alongside context bands—readings below 10% typically indicate weaker efficiency, 10–20% suggests healthy performance, and above 20% points to stronger returns relative to equity deployed. The result shows earnings generated per unit of equity capital. Net income is the primary driver of the ratio; changes there shift ROE more than equity changes do. A common scenario involves comparing ROE across periods to track whether a business is deploying shareholder capital more or less effectively over time. The calculator assumes stable accounting definitions and does not account for leverage structure, industry benchmarks, or capital quality variations.
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Formula Used
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Disclaimer
Results are estimates for educational purposes only. They do not constitute financial advice. Consult a qualified professional before making financial decisions.
Return on Equity (ROE) divides net income by shareholders equity. It measures how much profit the business generates for each pound owners have invested. 15-25% is strong; 10-15% is healthy; below 10% is usually weak. Unlike ROA, ROE reflects both operating quality and leverage choices - a highly-leveraged business can show high ROE even with mediocre operating performance.
800k net income on 4M shareholders equity = 20% ROE. Every 1 of invested capital generates 0.20 of profit annually. Sustained 20%+ ROE is a hallmark of quality businesses - network effects, switching costs, brand moats - that protect margins and pricing power over time.
DuPont analysis splits ROE into three drivers: net margin × asset turnover × leverage. A 20% ROE might come from 10% margin × 1x turnover × 2x leverage (typical retailer) or 20% margin × 0.5x turnover × 2x leverage (typical industrial) or 30% margin × 2x turnover × 0.3x leverage (software). Each looks different under the hood but produces the same ROE.
A worked example
Try the defaults: net income of 800,000, shareholders equity of 4,000,000. The tool returns 20.00%. You can adjust any input and the result updates as you type — no submit button, no reload. That's the real power here: seeing how sensitive the output is to one or two assumptions.
What moves the number most
The result responds to Net Income and Shareholders Equity. Not every input has equal weight. Adjusting one input at a time toward extreme values shows which ones move the result most.
The formula behind this
ROE = net income ÷ shareholders equity × 100. Everything the calculator does is shown in the formula box below, so you can check the math against your own spreadsheet if you want.
What to do with a low result
A disappointing result is information, not a judgement. Pick the single input that dragged the figure down most and focus the next quarter on that one factor. Breadth-first improvement rarely works; depth-first on the worst input usually does.
What this doesn't capture
The score is a composite of the inputs you provide. Life context — job security, family obligations, health, housing — doesn't appear in the math but shapes the real picture. Use the number as a prompt, not a verdict.
££800,000 net income ÷ ££4,000,000 equity = 20.00%.
Inputs
This example uses typical values for illustration. Adjust the inputs above to match a specific situation and see how the result changes.
Sources & Methodology
Methodology
This calculator computes Return on Equity (ROE) by dividing net income by shareholders' equity and expressing the result as a percentage. The formula treats net income as the numerator—representing profit after all expenses and taxes—and shareholders' equity as the denominator, reflecting the total capital invested by owners in the business. The calculator assumes both figures are taken from the same reporting period and that the equity value remains stable throughout that period. It does not account for changes in equity during the year, seasonal variations in earnings, or differences in accounting methods between entities. The result reflects historical performance only and should not be interpreted as a predictor of future returns.
References
Frequently Asked Questions
What's a good ROE?
ROE vs ROA?
Can ROE be too high?
Why use ROE instead of EPS growth?
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