Operating Margin Calculator

Operating income (EBIT) = Revenue − COGS − Operating expenses. Operating margin % = Operating income ÷ Revenue × 100. EBITDA margin = (EBIT + Depreciation & amortisation) ÷ Revenue × 100.

What operating margin measures

Operating margin is operating income divided by revenue. Operating income — EBIT, earnings before interest and tax — is what’s left after both the direct cost of sales (COGS) and the operating expenses of running the business (SG&A, R&D, depreciation) are taken out, but before interest and tax. That stopping point is the whole point: interest depends on how much debt a company chose to take on, and tax depends on where it operates and various one-offs, neither of which says anything about how good the underlying business is at making money. Operating margin isolates exactly that — the efficiency of the core operations — which is why it’s the margin analysts reach for when comparing the operating performance of two companies with different debt loads or tax situations.

Worked example — revenue 1,000, COGS 600, operating expenses 250 (SG&A 150 + R&D 20 + D&A 80): Gross profit = 1,000 − 600 = 400 (40% gross margin). Operating income = 400 − 250 = 150. Operating margin = 150 ÷ 1,000 = 15%. Adding back the 80 of D&A gives a 23% EBITDA margin.

Operating margin in the cascade — and EBITDA

Margins come in a hierarchy, and operating margin sits in the middle. Gross margin comes first (revenue less COGS) and is the ceiling everything below works down from. Operating margin takes the next bite — the overheads of actually running the business — and lands at EBIT. Net margin is the floor, after interest and tax have been paid. The gap between gross and operating margin tells you how heavy a company’s operating overheads are relative to its production costs; a business with a fat gross margin but a thin operating margin is spending heavily on sales, admin or research. The calculator shows all three side by side and draws the full descent as a waterfall so you can see where the money goes at each step.

One step up from operating margin sits the EBITDA margin, which adds depreciation and amortisation back to EBIT. Because D&A is a non-cash charge — an accounting spread of past capital spending — EBITDA margin approximates the cash profitability of operations and makes capital-heavy businesses more comparable with asset-light ones. It’s useful, but treat it with care: it isn’t free cash flow (it ignores the real capital spending that the depreciation represents), and a habit of leaning only on EBITDA can flatter a business that quietly consumes a lot of capital.

What’s a good operating margin?

It depends enormously on the industry. Software and other asset-light businesses can run operating margins of 20–40% or more once they reach scale, because their cost of sales is low and they enjoy operating leverage. Retailers and distributors often operate on low-to-mid single-digit operating margins, making up for it with high volume and fast inventory turnover. So the number is only meaningful against the right comparison — peers in the same industry, and the company’s own history. Enter a benchmark above to see the gap, and add several periods to chart the trend: a rising operating margin signals improving operating leverage or cost discipline, while a falling one can be an early warning even when revenue is still growing. Educational tool only, not investment advice.