Operating Margin

Operating Margin is the percentage of revenue remaining as profit after deducting operating expenses but before interest and taxes. It measures a company's efficiency in managing operating costs relative to sales.

Formula

Operating Margin = Operating Income ÷ Revenue × 100

Operating income = Revenue - Cost of Goods Sold - Operating Expenses (R&D, SG&A)

Example

Microsoft (MSFT) reports revenue of $200 billion, cost of goods sold of $60 billion, and operating expenses of $40 billion. Operating income is $100 billion, for an operating margin of 50%. Apple (AAPL) might have a 30% operating margin; Google (GOOGL) a 25% margin.

How to Interpret It

• Higher operating margin: The company is efficient at converting revenue to operating profit. Software and internet companies typically have 20-40% margins.
• Lower operating margin: The company spends heavily on operations relative to sales. Retail, agriculture, and manufacturing often have single-digit margins.
• Rising operating margin: Improving operational efficiency, economies of scale, or better cost management.
• Declining operating margin: Increasing costs, competitive pricing pressure, or investments in growth (more R&D/marketing spend).
• Industry benchmark: Compare operating margins to peers and industry averages. A 20% margin in software is normal; the same margin in retail would be exceptional.

Limitations

• Operating margin doesn't include interest and taxes, so it's not the true profit. Two companies with same operating margins can have different net margins depending on debt and tax rates.
• Operating expense definitions vary; some companies capitalize R&D, others expense it immediately, affecting margins.
• One-time restructuring charges or asset impairments distort operating margins; use adjusted operating margins or multi-year averages.
• Different business models (asset-light vs. asset-heavy) produce very different operating margins even within the same industry.

Related Terms

• Gross Margin — profit after COGS but before operating expenses
• Net Margin — profit after all expenses including interest and taxes
• EBITDA — operating profit before depreciation and amortization
• Return on Assets — profit generated per dollar of assets