Operating Margin

What Is Operating Margin?

Operating margin is a profitability ratio that shows how much of each dollar of revenue a company keeps as operating profit. Operating profit, also called operating income or earnings before interest and taxes (EBIT) in many cases, is what remains after a business pays the costs of running its core activities. Those costs include the cost of goods sold, salaries, rent, utilities, marketing and depreciation. Operating margin expresses that remainder as a percentage of total revenue, which makes it easier to compare companies of different sizes.

How It Is Calculated

The basic formula is:

Operating Margin = Operating Income / Revenue x 100

For example, if a company reports $500 million in revenue and $75 million in operating income, its operating margin is 15 percent. This means that for every dollar of sales, the company earned 15 cents from its operations before paying interest on debt or income taxes.

Why It Matters to Investors

Operating margin helps investors see how efficiently a business turns sales into profit from its everyday work. Because it excludes interest and taxes, it focuses on operating performance rather than on how a company is financed or where it is located for tax purposes. Comparing operating margins over several periods can show whether a company's costs are rising faster than its sales. Comparing margins across companies in the same industry is usually more meaningful than comparing companies in different industries, since typical margins vary widely by sector.

Limitations

Operating margin has limits. Companies can adjust what they count as operating expenses, and one-time items may distort the result in a single period. The ratio also says nothing about cash flow, debt levels or the quality of future earnings. For a fuller picture, investors often look at operating margin alongside other measures, such as net profit margin and free cash flow, and review the company's financial statements directly.