DuPont Analysis: Breaking ROE Into Its 3 Real Drivers
Two companies can post the same return on equity for completely different reasons. DuPont analysis splits ROE into margin, turnover and leverage to show why.
Puntos clave
- DuPont analysis splits return on equity (ROE) into three drivers: net margin, asset turnover, and financial leverage.
- The same headline ROE can come from pricing power, operational efficiency, or simply a pile of debt — and the source changes everything.
- [AAPL] and [COST] both earn high ROE, but for almost opposite reasons — margin versus turnover.
- A rising ROE driven only by more leverage is a warning sign, not a quality signal.
- The framework breaks down for banks and asset-light businesses, so know when not to use it.
Two companies can both report a 20% return on equity and be nothing alike — one earns it on fat margins, the other on dangerous debt. DuPont analysis is the simple breakdown that tells them apart, and it is one of the most underused tools in fundamental analysis.
What is DuPont analysis?
It is a way to decompose return on equity into the parts that actually create it. Instead of accepting a single ROE number, you ask what is producing it.
The classic three-step formula multiplies three ratios together:
| Component | Formula | What it measures |
|---|---|---|
| Net profit margin | Net income / Revenue | Pricing power |
| Asset turnover | Revenue / Total assets | Efficiency |
| Financial leverage | Total assets / Equity | Debt usage |
Multiply the three and the revenue and asset terms cancel, leaving net income over equity — which is ROE. The magic is not the math; it is seeing which lever is doing the work.
A high ROE built on margin is durable; a high ROE built on leverage is borrowed — literally — and can reverse the moment credit tightens. Same number, opposite quality.
How do you calculate it step by step?
Start with the three inputs from the income statement and balance sheet. Net margin comes from the income statement, while turnover and leverage pull from the balance sheet.
Say a company earns roughly 10% net margin, turns assets over about 1.5 times, and runs leverage near 2.0. Multiply 0.10 by 1.5 by 2.0 and you get an ROE of about 30%.
Now change one lever. If margin stays at 10% but leverage climbs to 3.0, ROE jumps to about 45% — without the business getting one bit better operationally.
That is the entire point. The decomposition forces you to ask whether a rising return reflects a stronger business or just a riskier balance sheet.
What do real companies reveal under DuPont?
The framework shines when you compare two strong businesses with different models. Consider three familiar names.
| Company | ROE driver | What stands out |
|---|---|---|
| AAPL | High margin | Pricing power, buybacks lift leverage |
| COST | High turnover | Thin margins, rapid inventory churn |
| KO | Margin + brand | Steady margin, moderate turnover |
Apple (AAPL) earns its return mostly on margin and, increasingly, on leverage from aggressive buybacks that shrink the equity base. Costco (COST) does almost the opposite, grinding out a return on razor-thin margins and breathtaking asset turnover.
Coca-Cola (KO) sits in between, leaning on brand-driven margin with steady turnover. Walmart (WMT) looks much like Costco — a turnover machine — while Home Depot (HD) blends solid margin with heavy buyback-driven leverage.
Seeing these differences side by side is far more useful than ranking them by a single ROE figure.
What are the most common DuPont mistakes?
The biggest is celebrating leverage-driven ROE. When a company's return climbs only because it borrowed more or bought back stock with debt, you are looking at higher risk dressed up as higher quality.
A second mistake is ignoring the trend. A one-year snapshot tells you little; the insight comes from watching how each of the three levers moves over five years.
A third is comparing across industries. A software firm and a grocer have structurally different turnover and margin profiles, so cross-sector DuPont comparisons mislead more than they help.
The number to fear is a flat or falling margin paired with a steadily rising leverage ratio — that combination manufactures ROE growth while quietly increasing fragility.
Pro tips for using DuPont well
Track each lever as a time series, not a single year. The story is almost always in the direction of travel, not the snapshot.
Pair DuPont with cash-flow checks. Buybacks funded by free cash flow are healthy; buybacks funded by new debt while margins erode are the opposite.
Use it as a screening conversation-starter, not a verdict. When you see an unusual ROE, DuPont tells you which question to ask next — about pricing, efficiency, or the balance sheet.
For more ways to pressure-test a balance sheet, see our broader fundamental analysis lessons and the legendary investor models that lean on returns-based metrics.
When should you NOT use DuPont analysis?
Skip it for banks and insurers. Their balance sheets are built on leverage by design, so the leverage term in DuPont is meaningless as a quality signal for JPMorgan (JPM) or similar financials.
Be cautious with asset-light platforms too. A business with almost no balance-sheet assets can show distorted turnover and leverage figures that overstate or understate the real economics.
And never use it in isolation. DuPont explains the shape of a return; it does not tell you whether the price you are paying for that return is reasonable.
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Aprender fundamentalesFrequently Asked Questions
It breaks return on equity into net profit margin, asset turnover, and financial leverage. That shows whether a company's returns come from pricing power, operational efficiency, or simply using more debt.
