Suppose you give two managers $1,000 each to run a lemonade stand. At year's end, one hands you back $1,150 and the other $1,050. Both made money — but the first turned your money into profit far more efficiently. Return on equity (ROE) measures exactly that efficiency for a public company.
How ROE Is Calculated
"Shareholders' equity" is essentially what the company would have left if it sold everything and paid off all its debts — the owners' stake. ROE shows how much profit the company squeezes out of that stake each year, expressed as a percentage. A 15% ROE means the company generated 15 cents of profit for every dollar of shareholder equity.
What's a Good ROE?
| ROE range | Often suggests |
|---|---|
| Below 10% | Below-average efficiency for most industries |
| 10–15% | Solid, respectable performance |
| 15–20% | Strong — the company uses capital well |
| Above 20% | Excellent — but check it isn't driven by heavy debt |
As a rough rule, a sustained ROE above 15% is considered strong. But industry matters enormously — software companies often post very high ROE, while capital-heavy industries like utilities run lower by nature.
Why ROE Matters
ROE is a favorite of long-term investors because it reveals quality. A company that consistently earns a high return on its equity is usually a well-run business with a real competitive advantage. Warren Buffett has long cited consistent, high ROE as a hallmark of companies worth owning.
The Trap: Debt Can Inflate ROE
Here's the catch every beginner should know. Because ROE divides by equity, a company can boost its ROE simply by taking on lots of debt — which shrinks equity. A sky-high ROE built on a mountain of debt is fragile, not impressive. Always check ROE alongside the company's debt levels. A great ROE achieved without heavy borrowing is the real sign of quality.
What is "shareholders' equity"?
Is a higher ROE always better?
How is ROE different from profit margin?
How Plainsheet Helps
Compare how efficiently companies use capital.
Plainsheet calculates return on equity from SEC filings so you can quickly see which companies turn shareholder money into profit most effectively.
Explore a company on Plainsheet →ROE builds on net income and can be distorted by debt. See how to weigh it alongside other measures when researching a stock.