Operating margin is the percentage of a business’s revenue that remains after cost of goods sold and operating expenses have been deducted, before interest and income taxes. In restaurant management, it helps show how efficiently the operation converts sales into operating profit.
Operating margin % = Operating income ÷ Net revenue × 100
Operating income is calculated after deducting cost of goods sold and operating expenses, according to the business’s accounting method. The reporting basis should be consistent when comparing periods or locations.
If a restaurant has $1,000,000 in net revenue and $900,000 in total operating costs, including cost of goods sold and operating expenses, operating income is $100,000 and operating margin is 10%.
Gross margin is calculated after cost of goods sold. Operating margin also deducts operating expenses such as labour, rent, utilities and marketing. Net profit margin is calculated after additional non-operating expenses, interest and applicable taxes.
Operating margin helps owners assess whether menu pricing, sales volume, food cost, labour and overhead are producing a sustainable operating result. It can be compared across periods, locations or business models when the accounting basis is consistent.
Chef’s tip: Review operating margin alongside food cost, labour cost and prime cost. A change in one category can affect the result even when sales remain stable.
Key distinction: Operating margin measures operating profit as a share of revenue; it is not the same as gross margin or final net profit margin.
This term is one of hundreds covered in depth across OCS courses, learning paths, and 1-on-1 coaching with Chef Eric.
