TL;DR: DuPont analysis expresses return on equity as net margin multiplied by asset turnover multiplied by the leverage multiplier. Illustrative example only: a company with net income of $80,000 on $1,000,000 of sales has an 8 percent margin, turns its average assets of $800,000 1.25 times, and carries leverage of 2.0 on average equity of $400,000. Its ROE is 0.08 multiplied by 1.25 multiplied by 2.0, which equals 20 percent, matching the direct check of $80,000 divided by $400,000.
Key Takeaways
- The worked example in this draft is fully illustrative. Its arithmetic is recorded in Sources and method below and was recomputed for this draft.
- Definitions here follow standard filing and fund reporting usage. Where providers use a different definition, the draft says so and tells you to check which one a source is using.
- This is educational information, not financial advice, and it is not a recommendation to buy, sell, or hold any security or fund.
Work all three parts, then rebuild ROE
Start with the direct figure DuPont exists to explain, from return on equity explained: net income of $80,000 divided by average equity of $400,000 equals 20 percent. Now split it. Part one, net margin: $80,000 divided by sales of $1,000,000 equals 0.08, or 8 percent, the profitability slice detailed in profit margins explained. Part two, asset turnover: $1,000,000 divided by average assets of $800,000 equals 1.25, the efficiency slice measured in asset turnover ratio explained. Part three, leverage: average assets of $800,000 divided by average equity of $400,000 equals 2.0, meaning two dollars of assets stand on each dollar of equity.
Multiply the parts: 0.08 multiplied by 1.25 equals 0.10, and 0.10 multiplied by 2.0 equals 0.20, the same 20 percent. The split is not a trick. Sales cancel, assets cancel, and what remains is income over equity. What the split adds is diagnosis: three named levers, each owned by different decisions, instead of one blunt score.
Reading the three levers as a business story
Different businesses win on different levers, and the DuPont split names the strategy. A premium brand wins on margin: high profit per sale, modest turnover, low leverage. A grocer or discounter wins on turnover: thin margin spun many times a year. A bank or utility leans on leverage, with the regulatory and risk weight that choice carries, visible in its funding mix through debt to equity ratio explained. Two companies can post the same 20 percent ROE with opposite risk profiles, one earning it on margin and turnover, the other renting it from leverage. The single ROE figure calls them equal. The split does not.
Changes over time are where the tool earns its keep. ROE rising because margin improved is an operating story. ROE rising because turnover improved is an efficiency story. ROE rising only because leverage rose is a financing story wearing an operating costume, and it reverses hard when credit tightens. Plotting the three parts across five years of filings turns a vague sense that returns improved into a specific, checkable account of how.
Limits and honest use
DuPont analysis inherits every weakness of its inputs. Equity can be shrunk by buybacks or by write downs, and a smaller equity base can flatter later ROE figures, or it can be turned negative by losses, and a negative or tiny equity base makes ROE and the leverage part difficult to interpret, even though margin and turnover still compute cleanly. Asset values are book values, historical and depreciated, not current worth, the gap discussed in book value per share explained. One off gains and losses flow through margin and distort a single year, so the split works best on multi year, averaged balance sheet figures, the convention most data providers use for turnover and leverage.
Use the three part version in this explainer for diagnosis, and know that extended five part versions exist that split margin further into tax and interest burdens. The extension adds detail for specialists. The habit that matters at every level is the same: never quote an ROE without asking which lever produced it.
This article is educational information, not financial advice. Prices, company figures, and fund figures in the worked example are illustrative and are not figures for any real security, company, or fund.
Sources and method
- Target keyword: "dupont analysis explained" from .saeo/keywords.yaml (queue entry added 2026-11-01). No search volume or difficulty figure is claimed; both are recorded as unknown in the queue entry.
- All figures are labelled illustrative examples. Arithmetic verified for this draft on 2026-11-01 by recomputation in Python: margin 80,000 divided by 1,000,000 equals 0.08; turnover 1,000,000 divided by 800,000 equals 1.25; leverage 800,000 divided by 400,000 equals 2.0; product 0.08 multiplied by 1.25 multiplied by 2.0 equals 0.20 or 20 percent; direct check 80,000 divided by 400,000 equals 0.20.
- Internal links checked for this publish batch on 2026-11-01 against the live Fullport sitemap plus this batch: debt-to-equity-ratio-explained, return-on-equity-explained.
