Three ways to earn the same return
Return on equity is net income divided by shareholders' equity. DuPont analysis splits it into net profit margin (profit per dollar of sales), asset turnover (sales per dollar of assets) and the equity multiplier (assets per dollar of equity — that is, leverage).
The decomposition is what makes it useful. A 20% ROE built on 25% margins and modest leverage is a high-quality business. A 20% ROE built on 2% margins and 6× leverage is a balance-sheet bet that will look very different in a downturn.
Different industries live in different corners of this triangle. Supermarkets and distributors run thin margins with fast turnover; luxury brands do the opposite; banks and utilities rely on leverage. Comparing the components against direct peers tells you far more than the headline ROE ever will.
Why ROE alone lies
Return on equity is one of the cleanest single metrics for shareholder value creation, but it conceals more than it reveals. A 20% ROE can come from a high-margin, low-turnover luxury brand, a thin-margin, high-turnover retailer, or a heavily levered bank. The drivers are different and the risks are different. The DuPont decomposition separates ROE into three components — net profit margin, asset turnover and financial leverage — so you can see which one is doing the work.
Reading the three drivers
Net profit margin. How much of each revenue dollar becomes profit. High-margin businesses usually have pricing power, a differentiated product, or a structural advantage (network effects, switching costs, regulatory protection).
Asset turnover. How many dollars of revenue each dollar of assets produces. High-turnover businesses are typically asset-light — retailers, food service, logistics — where the key skill is operational efficiency.
Equity multiplier. How much debt a company carries relative to its equity. A high multiplier amplifies both gains and losses; the same operating performance produces higher ROE but at the cost of higher risk. Banks run high multipliers by design; most industrial companies should not.
The leverage trap
A company can grow reported ROE by taking on more debt, without any improvement to operations. That is why comparing ROE between companies requires looking at leverage too — two businesses with identical operating performance can show different headline ROE because one is more levered. A clean comparison normalises for leverage or uses return on invested capital instead.
The DuPont view makes this explicit. If a company's ROE is high because of the equity multiplier, the underlying operating story is weaker than the headline number suggests.
Formula
ROE = Net Profit Margin × Asset Turnover × Equity Multiplier = (NI ÷ Revenue) × (Revenue ÷ Assets) × (Assets ÷ Equity)
FAQ
What is a good ROE?
Above 15% is generally strong, above 20% excellent — but only if it is not primarily leverage-driven. Always run the DuPont breakdown before celebrating a high headline number, and compare against the sector rather than the market.
Why can leverage make ROE look better?
Because borrowing shrinks the equity base while adding assets. A company with 6× leverage reports the same profit over a much smaller equity denominator, inflating ROE without improving the underlying business at all.
Should I use average or year-end equity?
Average equity over the period is technically correct, since profit is earned across the year while the balance sheet is a snapshot. Year-end equity is fine for quick comparisons but can distort results after large buybacks or share issuance.
How does this relate to sustainable growth?
Retained earnings multiplied by ROE gives the rate at which a company can grow without external capital. That is why a high-quality ROE compounds while a leveraged one often cannot — see the payout ratio calculator for the retained portion.
Related calculators
- CAGR Calculator — compound growth rate and forward projections
- Total Return Calculator — price change plus dividends, annualized
- Compound Interest Calculator — future value with periodic contributions
More calculators
- Dividend Yield Calculator — yield, income per $10,000, capital needed
- Payout Ratio Calculator — dividend safety and sustainable growth
- P/E Ratio Calculator — multiple, earnings yield, PEG, target price
- Graham Number Calculator — Graham's maximum buy price
- EV/EBITDA Calculator — enterprise value against operating earnings
- WACC Calculator — weighted average cost of capital for discounting
- Two-Stage DDM Calculator — high-growth then stable dividend valuation
- EPS Calculator — basic and diluted earnings per share
- P/B Ratio Calculator — price against book value, with ROE context
- Margin of Safety Calculator — discount between value and price
- Reverse DCF Calculator — the growth rate today's price already assumes
- Position Size Calculator — how many shares to buy for a set risk
- DCF Calculator — fair value from five years of cash flow plus terminal value
- Dividend Discount Model — Gordon Growth valuation for dividend payers
Guides
- How to Value a Stock — the full valuation sequence, with a worked example
- Free Cash Flow Explained — the input every DCF depends on
- Margin of Safety Explained — why the discount is not optional
- Dividend Investing Guide — yield, payout ratio and dividend safety
- How to Read a Cash Flow Statement — three sections, eight combinations
- Intrinsic Value vs Market Price — why the two diverge, and how to behave
- How to Read a Balance Sheet — the asset side, and the four ways it misleads
- What Is a Good P/E Ratio? — the arithmetic behind a justified multiple
- Dividend Yield vs Total Return — why a high yield is not a high return
- How to Compare Two Stocks — a five-axis framework, worked side by side
- WACC Explained — the discount rate, built from five sourced inputs
- The DCF Method Explained — the forecast half of a DCF, and checking the terminal value
- The Graham Number Explained — Graham's ceiling tested on two companies, and what it cannot see