Operating Margin
The share of revenue left as operating profit after core-business costs — the company's core-business profitability.
Operating Margin = Operating Profit ÷ Revenue × 100
The higher the operating margin, the better core-business profitability is considered to be.
In plain terms
If a cafe sells $10,000 in a month (revenue) and $2,000 is left after paying for beans, rent, and wages, the operating margin is 20%. It's "what percentage of revenue is left as profit from the core business."
Items not directly related to the core business, like interest or taxes, are excluded here, so it looks only at what the business itself kept. That's why it shows "the strength of the core business" best.
The filled part is what the core business kept. Interest and taxes sit outside the trading itself, so they have not been taken out yet.
The same 20% means different things by industry — a manufacturer with heavy costs and a software firm with light ones are hard to hold to one yardstick.
The figures belong to a made-up company, Example Inc. Every picture in this glossary uses the same company, so you can see how the metrics connect.
What it tells you
A high operating margin means the company gets its price (pricing power) or controls costs well. The fiercer the competition, the more margins get shaved, so a high and steady operating margin is a clue that the company holds an edge in its market.
The direction of operating margin over time (improving/deteriorating) lets you read whether the company is in a phase of firming up efficiency or giving up margin for market share.
Formula
Operating Margin = Operating Profit ÷ Revenue × 100
What high or low means
The higher the operating margin, the better core-business profitability is considered to be. An improving trend can be read as a sign that cost efficiency or pricing power is strengthening.
Normal levels differ greatly by industry (30%-plus is common in software, while single digits are typical in retail). So a single absolute figure can't be used to compare companies in different industries; the differences show up in the position and trend within the same industry.
Comparing across industries is the most common mistake. A grocery chain (small margin, high volume) and a luxury brand (large margin, low volume) run different business models, so operating margin alone doesn't tell you which is better. A low margin isn't necessarily bad — it may be normal for that industry.
One-time costs (restructuring, litigation settlements, asset write-downs) can weigh on a particular quarter's operating income and cause the margin to drop sharply. Looking at the trend over several quarters, rather than a single quarter, shows the real direction.
If a company separately reports "adjusted operating income" that excludes items such as stock given to employees instead of cash (stock-based compensation), the margin can look better than it actually is. The figure differs depending on whether the margin a company highlights is the accounting-standard number or an adjusted one.
Metrics to read alongside
Guides that cover this term
See it in real stocks
Search US stocks on Stocklore to see Operating alongside the sector benchmark.
This explanation is for information and reference only and is not a recommendation to buy or sell any security. Investment decisions and their consequences are your own.