DuPont Analysis
DuPont analysis is a framework that decomposes return on equity (ROE) into its three or five component drivers — profitability, efficiency, and leverage — allowing investors to identify the specific sources and sustainability of a company's return on shareholder capital.
The DuPont analysis framework was developed by the DuPont Corporation in the 1920s as an internal financial management tool and later became one of the most widely taught and used methods in fundamental equity analysis. Its power lies in disaggregating a single summary metric — return on equity — into its constituent drivers, enabling more precise diagnosis of what is working or weakening in a business.
The three-factor DuPont decomposition expresses ROE as the product of three ratios: ROE = Net Profit Margin × Asset Turnover × Equity Multiplier. Net profit margin (net income / revenue) captures profitability — how much of each revenue dollar flows to the bottom line. Asset turnover (revenue / average total assets) captures efficiency — how productively the company deploys its asset base to generate sales. The equity multiplier (average total assets / average shareholders' equity) captures financial leverage — how many dollars of assets are supported by each dollar of equity capital. Multiplying these three together yields ROE (net income / shareholders' equity).
The five-factor version (also called the extended DuPont) further splits net profit margin into tax burden (net income / pre-tax income), interest burden (pre-tax income / EBIT), and EBIT margin (EBIT / revenue). This additional granularity separates the effect of financing costs (the interest burden) and tax policy from the operating profitability of the underlying business, allowing analysts to compare operating performance across companies with different capital structures or tax circumstances.
In practice, DuPont analysis is used comparatively — across companies in a peer group or across time periods for the same company — to identify which drivers are superior or deteriorating. Apple's exceptional ROE, consistently exceeding 100% in recent years, stems from a combination of high profit margins (reflecting the premium pricing power of its ecosystem), high asset turnover (reflecting the asset-light outsourced manufacturing model), and elevated leverage (reflecting aggressive use of debt to fund share buybacks, which reduces the equity denominator). Understanding that Apple's ROE is partly a function of financial engineering — not solely superior operational performance — is the kind of nuance that DuPont analysis surfaces.
A company that achieves high ROE solely through excessive leverage deserves more skepticism than one achieving the same ROE through superior margins or asset efficiency. Highly leveraged firms are more vulnerable to earnings downturns, rising interest rates, and tightening credit conditions. DuPont analysis therefore encourages investors to ask not just 'how high is ROE?' but 'from which levers is it being generated, and are those levers sustainable given the competitive and financial environment?'