Glossary/Fundamentals

Return on Equity

Also known as ROE, Return on common equity

Return on equity, or ROE, measures accounting profit attributable to common shareholders relative to their average book equity. It indicates how much reported income a company generated for each unit of shareholder capital recorded on its balance sheet.

Editorially reviewed 2026-07-30

Why return on equity matters

ROE connects profitability with the equity capital employed and helps assess business quality, growth economics, and valuation. A company that reinvests at returns above its cost of equity can create value. High ROE can also result from leverage, low book equity, or one-time gains rather than operating strength. Investors therefore decompose the ratio instead of treating a high number as automatically superior.

How it is applied

Divide net income available to common shareholders by average beginning and ending common equity. Adjustments may remove unusual items, preferred claims, accumulated other comprehensive income, or excess capital when clearly justified. DuPont analysis separates net margin, asset turnover, and financial leverage. Analysts compare ROE with cost of equity, reinvestment rate, peers, and the company’s history while reconciling changes in shares and book value.

Formula

ROE = Net income available to common shareholders / Average common equity
Net income
Accounting profit attributable to common shareholders for the period
Average common equity
Average book equity over the measurement period

Portfolio example

A company earns $120 million with average common equity of $800 million, giving 15% ROE. If it borrows to repurchase $300 million of shares, equity falls and ROE can rise even if operating profit is unchanged. Shareholders face more leverage. A competitor earning 13% with little debt and strong reinvestment opportunities may have better underlying economics despite the lower headline ratio.

How to interpret it

ROE above cost of equity can indicate value creation if earnings are sustainable and incremental capital earns similar returns. Low ROE may reflect weak economics or temporary excess capital. Negative equity or losses make the ratio hard to interpret. Banks require attention to asset risk and regulatory capital, while asset-light firms may have high ROE because valuable internally developed intangibles are absent from book equity.

Limitations and common misconceptions

Accounting estimates, impairments, buybacks, acquisitions, and currency translation affect both numerator and denominator. Leverage magnifies ROE and risk. Average book equity may not represent capital currently required to reproduce the business. A mature company can show high ROE but few reinvestment opportunities. Return on invested capital, cash conversion, growth, balance-sheet resilience, and incremental returns should provide complementary long-term economic evidence. A useful cross-check is to decompose ROE into profit margin, asset turnover, and financial leverage. That identifies whether an apparently superior result comes from operating performance or simply from a thinner equity base.

Sources and further reading

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