Revenue less cost of goods sold and operating expenses: what the core business earns before interest and tax.
Operating profit, also called operating income or EBIT in many reports, is what the business earns from its normal operations. It takes gross profit and subtracts the costs of running the company, such as salaries, rent, marketing and depreciation, but stops before interest expense, income tax and non-operating items.
Operating profit = revenue − cost of goods sold − operating expenses. Operating margin divides it by revenue.
Revenue of $1,500,000, cost of goods sold of $900,000 and operating expenses of $420,000 give gross profit of $600,000 and operating profit of $180,000, an operating margin of 12%.
Items placed on the wrong side of the line. A gain on selling equipment or a one-time legal settlement booked inside operating expenses flatters or hides the real result, and companies classify these differently, so check the notes before comparing. For how it differs from revenue and net income, see revenue vs profit.