Finance
2 min read

Return on Equity (ROE)

A profitability ratio calculated as net income divided by shareholder equity. ROE shows how effectively a company turns shareholder capital into profit; consistently high ROE is a hallmark of quality businesses.

How ROE is calculated

ROE = Net Income / Shareholders' Equity

A company with $50M net income and $250M shareholders' equity has 20% ROE.

This represents the return shareholders earn on their invested capital.

What ROE shows

Several uses:

  • Profitability per dollar of shareholder capital.
  • Cross-company comparison within similar industries.
  • Quality indicator — sustained high ROE often correlates with competitive advantages.
  • Growth potential — high ROE companies can compound retained earnings effectively.

Warren Buffett famously emphasizes ROE in evaluating businesses.

ROE benchmarks

Approximate ranges:

  • Below 5% — generally weak.
  • 10-15% — typical for many businesses.
  • 15-25% — strong; often quality businesses.
  • Above 25% — exceptional or driven by leverage.

Industry context matters significantly.

DuPont decomposition

A useful framework:

ROE = Net Margin × Asset Turnover × Equity Multiplier

Or:

ROE = (Net Income / Revenue) × (Revenue / Assets) × (Assets / Equity)

This breaks ROE into three drivers:

  • Net margin — profitability per dollar of revenue.
  • Asset turnover — efficiency in using assets.
  • Equity multiplier (leverage) — magnification through debt.

Different industries achieve ROE through different combinations.

ROE vs. ROA

Important distinction:

  • ROA — return on total assets.
  • ROE — return on shareholder equity.

The gap reflects leverage. High-leverage companies can have impressive ROE despite modest ROA.

Why ROE alone can mislead

Several issues:

  • Leverage inflation. Debt boosts ROE but also risk.
  • Buyback effects. Reducing equity through share buybacks raises ROE without operational improvement.
  • Goodwill accounting. Heavy acquirers carry goodwill that affects equity comparisons.
  • One-time effects. Special charges or gains can distort.

Quality analysis adjusts for these.

Sustainable competitive advantage

Persistently high ROE often signals durable competitive advantage:

  • Network effects.
  • Brand premiums.
  • Switching costs.
  • Patents or intellectual property.
  • Cost advantages.

These create "moats" that protect ROE from competitive erosion.

ROE in different sectors

Industry-specific patterns:

  • Software/SaaS — often very high ROE.
  • Pharma — typically high.
  • Banks — moderate, leveraged.
  • Utilities — moderate, regulated.
  • Cyclical businesses — variable through cycle.

What individuals should know

For investors:

  • Watch ROE trends for signs of improving or deteriorating quality.
  • Compare to industry peers — context matters.
  • Decompose using DuPont to understand drivers.
  • Beware leveraged ROE — sustainable only if underlying is strong.

For most retail investors using index funds, detailed ROE analysis isn't necessary. For individual stock picking, ROE is among the most useful single metrics for evaluating business quality.