What it measures
Operating margin is operating income divided by revenue. Operating income is what is left after the cost of the product and the cost of running the business (salaries, research, marketing, rent), but before interest and taxes.
It is the purest measure of how profitable the business itself is, because it ignores how the company is financed (interest) and where it is taxed.
Why it is useful
- Comparing companies with different debt. Two identical businesses, one with heavy debt, have the same operating margin but different net margins.
- Seeing operating leverage. When revenue grows faster than operating costs, operating margin expands. That is the engine behind fast EPS growth (TTM and forward).
- Spotting cost problems. A steady Gross margin with a falling operating margin means overhead is growing faster than sales.
Typical readings
| Operating margin | Reading |
|---|---|
| Above 30% | Exceptional; often software, payments or luxury |
| 15% to 30% | Strong |
| 5% to 15% | Average for many industries |
| Below 5% | Thin; typical for retail and distribution |
Caveats
- Stock-based compensation is a real cost that some companies exclude from "adjusted" operating income. Prefer the GAAP figure, or add it back yourself.
- Restructuring charges can make one year look worse than the business is.
See also
- Gross margin What gross margin is, what it reveals about pricing power, typical ranges by industry, and why its trend matters as much as its level.
- Net margin Net profit margin shows how much of each sales dollar a company keeps after every cost. What counts as strong, and how to read its trend.
- EV/EBITDA EV/EBITDA values a whole company, debt included, against its operating cash earnings. How enterprise value works and when to use it over P/E.
- The income statement How to read an income statement line by line, from revenue to earnings per share, and which lines matter most for investors.
Pages that link here: Earnings reports and calls, Fundamentals checklist
Last updated September 30, 2026. Education only, not investment advice.