What it means
Return on equity is one of the most quoted numbers in business, but on its own it hides the story. Two companies can both report a 20% return on equity for completely different reasons, and Dupont Analysis separates those reasons so you can see them.
It does this by multiplying together net profit margin, asset turnover and the equity multiplier. Net profit margin tells you how many cents of profit the business keeps from each dollar of sales.
Asset turnover tells you how many dollars of sales the business generates from each dollar of assets, which is a measure of efficiency. The equity multiplier tells you how many dollars of assets sit behind each dollar of owners' money, so it is really a measure of how much debt the business is using.
In practice, managers use the breakdown to decide where to act. A supermarket usually has a thin margin but very fast turnover, while a luxury goods maker has a fat margin but slower turnover.
Neither is wrong; the analysis simply shows which lever each business relies on. The equity multiplier deserves special attention because it is the easiest lever to pull and the riskiest.
A company can lift its return on equity just by borrowing more, even if the underlying business has not improved at all. Lenders and boards therefore look at the third component before celebrating a rising return.
There are two common variants. The three-step version described here is the standard teaching model, while a five-step version splits the margin further into the tax burden, the interest burden and the operating margin.
The longer version is useful when you want to know whether a falling return is caused by operations, financing costs or tax.
In practice
Real-world examples
Example 1
A regional retailer reports a return on equity of 18%, down from 22%. The Dupont breakdown shows margin and turnover are unchanged, but the equity multiplier has fallen because the company repaid a large loan. The board realises the lower return reflects a safer balance sheet, not a weaker business.
Example 2
A software firm is compared with a freight company. The software firm earns its return from a very high net margin and low asset turnover, while the freight company earns the same return from a thin margin, heavy assets and a high equity multiplier. An investor uses the analysis to see that the two returns carry very different risks.
Example 3
A private equity analyst reviews a manufacturer that has doubled its return on equity in three years. The breakdown reveals that nearly all the improvement came from a rising equity multiplier after a debt-funded share buyback. She flags that a drop in sales could now hurt the company far more than before.
Think of it
DuPont analysis is like figuring out how someone earned their grade-through excellent test scores, extra credit, or generous curves.
Formula
Calculation
Return on equity = Net profit margin x Asset turnover x Equity multiplier
Where net profit margin = Net income / Revenue, asset turnover = Revenue / Total assets, and equity multiplier = Total assets / Shareholders' equity.
Suppose a company has net income of $120,000, revenue of $1,200,000, total assets of $800,000 and shareholders' equity of $400,000.
Net profit margin = 120,000 / 1,200,000 = 10%.
Asset turnover = 1,200,000 / 800,000 = 1.5 times.
Equity multiplier = 800,000 / 400,000 = 2.0.
Return on equity = 10% x 1.5 x 2.0 = 30%.
As a check, net income divided by equity directly is 120,000 / 400,000 = 30%, so the three pieces multiply back to the same answer.Case study
Seen in the real world
Harbourline Furniture is an illustrative, fictional company whose return on equity slipped from 24% to 19% over two years. The managing director assumed pricing pressure was to blame and began preparing a discount-reduction plan.
The finance manager ran a Dupont breakdown before the plan went ahead. Net profit margin had in fact edged up from 8% to 8.5%, but asset turnover had fallen from 1.5 to 1.2 because a new warehouse was filled with slow-moving stock, and the equity multiplier was steady.
The fix was therefore not about prices at all. The company cleared the excess stock, turnover recovered towards 1.4, and the illustrative lesson is that the right remedy depends on which of the three pieces has actually moved.
Watch out
Common mistakes
- Treating a high return on equity as automatically good without checking how much of it comes from borrowing.
- Comparing the components across industries as if every sector should have the same margin and turnover.
- Using year-end balances for assets and equity in one component and average balances in another, which stops the pieces multiplying back to the headline figure.
Questions
People also ask
Why is it called Dupont Analysis?
It takes its name from the chemical company whose finance team developed the framework in the early twentieth century to understand returns across its business.
Can the equity multiplier be too high?
Yes, because a high multiplier means a thin cushion of owners' money behind the assets, so a small fall in profits can create serious difficulty meeting debt payments.
Is there a version that includes tax and interest?
Yes, the five-step version splits the net margin into tax burden, interest burden and operating margin, which helps pinpoint where a change in return is coming from.