Profitability ratio showing how much revenue remains after operating expenses but before interest and taxes.
Operating margin measures how much of each revenue dollar remains after a company pays its operating costs. It is one of the cleanest profitability ratios because it focuses on core operations before interest and taxes.
The formula is:
If a company earns $100 million of revenue and produces $15 million of operating income, operating margin is 15%.
Operating margin matters because it captures more of the full business model than gross margin does.
It reflects:
pricing power
direct-cost control
overhead discipline
operating scale
That makes it especially useful when investors want to know whether a company is turning sales into real operating profit rather than just gross profit.
Gross margin stops after direct costs.
Operating margin goes further by subtracting operating expenses such as:
sales and marketing
general and administrative costs
research and development
So a company can have strong gross margin but mediocre operating margin if the organization is expensive to run.
When analysts talk about margin expansion, they often mean operating margin improvement.
That can happen because:
prices rise
direct costs fall
overhead grows more slowly than revenue
scale improves efficiency
Margin expansion is important because it can drive profit growth even when revenue growth is only moderate.
Operating-margin levels differ widely across sectors.
software businesses may support high operating margins
retailers often operate on lower margins
early-stage companies may accept low or negative margins to grow
So the ratio should usually be compared with peers and with the company’s own history.
Operating Income: The numerator in the operating-margin formula.
Gross Margin: A higher-level margin before operating expenses.
Gross Profit: The dollar basis for gross-margin analysis.
EBITDA: Another operating-performance measure often used in valuation.
Revenue: The denominator in margin analysis.