Financial metric · Profitability
Net Profit Margin
How much of every $100 of sales is left as net income after all costs, interest and taxes.
How to calculate it
Net margin = net income ÷ revenueOperating margin = operating income ÷ revenue (before interest and taxes)Gross margin − operating expense ratio ≈ operating margin; then subtract interest, other items and taxes to reach net marginHow to read it
- The gap between gross margin and net margin is mostly operating expenses (sales and marketing, R&D, general and administrative), interest and income tax. When the gap widens, find out which cost grew fastest.
- Operating margin is often more useful than net margin because it strips out financing choices and one-off items below the operating line.
- A steady net margin is worth more than an occasionally high one. Large swings usually mean one-time items or a cyclical business.
Common pitfalls
- Net income can include gains on asset sales, changes in the fair value of investments, legal settlements and tax benefits. A high net margin does not prove the core business is profitable.
- Since 2018, U.S. companies must run changes in the market value of most equity investments through net income (ASU 2016-01), so companies holding large stock portfolios can show big swings unrelated to operations.
- A low net margin is not necessarily bad: high-volume, low-margin businesses (warehouse retail, contract manufacturing) can still earn a strong ROE through fast asset turnover.
Industry differences
As with gross margin, compare only within an industry or across years for the same company.
Where to find it in a 10-K
Income statement. Use net income attributable to the company (after noncontrolling interests). MD&A explains changes in operating expenses.
U.S. vs. China reporting
In China, investors routinely compare net income with a mandated recurring-profit figure (net profit after deducting non-recurring items). U.S. GAAP has no such line. Instead, companies publish their own non-GAAP adjusted figures, which are less standardized. See the non-GAAP earnings page.