Operating Margin: worked example
| Revenue | $1,200,000 |
|---|---|
| Cost of goods sold | $700,000 |
| Operating expenses | $300,000 |
| Operating margin | 16.7% |
| Operating income | $200,000 |
| Gross margin | 41.7% |
Common error: Reading a high gross margin as a healthy business. Overhead can swallow most of it, and only the operating margin shows what remains.
Operating Margin: formula
OpenStax Principles of Finance: profitability ratios and the DuPont method
Operating margin depends on the classification of costs, so comparisons between firms need care. It ignores interest and taxes, which can be large for leveraged businesses. A rising margin because of a one-time cost cut may not last.
Seasonal businesses have swings, so use a full year.
Use net revenue, cost of sales and operating expenses for the same accounting period. Keep interest and income tax outside this operating measure. Include depreciation in the category where the statement reports it; do not add it again if already included in cost of sales.
If excluding one-time items, label the result adjusted and reconcile it with reported operating income.
Operating Margin: changing Revenue
| Revenue | Operating margin | Operating income | Gross margin |
|---|---|---|---|
| $960,000 | -4.2% | -$40,000 | 27.1% |
| $1,080,000 | 7.4% | $80,000 | 35.2% |
| $1,200,000 (example) | 16.7% | $200,000 | 41.7% |
| $1,320,000 | 24.2% | $320,000 | 47.0% |
| $1,440,000 | 30.6% | $440,000 | 51.4% |
Operating Margin: compare input ranges
| Input | Tested from | To | Operating margin: low input | Operating margin: high input | Swing |
|---|---|---|---|---|---|
| Revenue | $1,080,000 | $1,320,000 | 7.4% | 24.2% | 16.8% (101%) |
| Cost of goods sold | $630,000 | $770,000 | 22.5% | 10.8% | 11.7% (70%) |
| Operating expenses | $270,000 | $330,000 | 19.2% | 14.2% | 5.0% (30%) |
Operating Margin: individual input comparisons
| Input | Value | Operating margin | Operating income | Gross margin |
|---|---|---|---|---|
| Revenue | $960,000 | -4.2% | -$40,000 | 27.1% |
| $1,080,000 | 7.4% | $80,000 | 35.2% | |
| $1,200,000 | 16.7% | $200,000 | 41.7% | |
| $1,320,000 | 24.2% | $320,000 | 47.0% | |
| $1,440,000 | 30.6% | $440,000 | 51.4% | |
| Cost of goods sold | $560,000 | 28.3% | $340,000 | 53.3% |
| $630,000 | 22.5% | $270,000 | 47.5% | |
| $700,000 | 16.7% | $200,000 | 41.7% | |
| $770,000 | 10.8% | $130,000 | 35.8% | |
| $840,000 | 5.0% | $60,000 | 30.0% | |
| Operating expenses | $240,000 | 21.7% | $260,000 | 41.7% |
| $270,000 | 19.2% | $230,000 | 41.7% | |
| $300,000 | 16.7% | $200,000 | 41.7% | |
| $330,000 | 14.2% | $170,000 | 41.7% | |
| $360,000 | 11.7% | $140,000 | 41.7% |
Operating Margin: combined input changes
| Revenue / Cost of goods sold | $560,000 | $700,000 | $840,000 |
|---|---|---|---|
| $960,000 | 10.4% | -4.2% | -18.8% |
| $1,080,000 | 20.4% | 7.4% | -5.6% |
| $1,200,000 | 28.3% | 16.7% | 5.0% |
| $1,320,000 | 34.8% | 24.2% | 13.6% |
| $1,440,000 | 40.3% | 30.6% | 20.8% |
Operating Margin: which assumptions move the result?
Operating Margin: values and definitions
| Quantity and definition | Value used |
|---|---|
| Revenue | $1,200,000 |
| Cost of goods sold | $700,000 |
| Operating expenses — Rent, wages, marketing and other running costs. Leave out interest and taxes. | $300,000 |
| Operating margin | 16.7% |
| Operating income | $200,000 |
| Gross margin | 41.7% |
Business Finance calculators: Cost of Goods Sold (COGS) Calculator, DuPont Analysis Calculator, Employee Turnover Rate Calculator, Net Promoter Score Calculator, Marketing Metrics Calculator, Sum-of-the-Years'-Digits Depreciation Calculator.
Operating margin shows what is left from each dollar of sales after paying for the product and for running the business, before interest and tax. From $1.2 million of revenue, $700,000 of cost of goods and $300,000 of expenses, the business keeps $200,000, or 16.7 percent. The gross margin beside it, 41.7 percent, shows how much of the gap between the two is eaten by overhead.
Keep interest and taxes out of the expenses. They belong below the operating line, and including them turns this into a different, smaller margin.
Gross, operating and net profit margins deduct different costs; operating leverage concerns the effect of volume on operating profit. The EBITDA margin calculator adds back depreciation. The DuPont analysis uses margin to explain return on equity.
Does excluding a one-time expense preserve reported operating margin?
No. It creates an adjusted measure. Adjusted operating income excludes a stated set of costs; reported operating income retains the reported expense scope.
Can depreciation appear in cost of goods sold?
Yes. Follow the income statement’s functional classification and avoid counting the same charge again in operating expenses.
How is operating margin different from gross margin?
Gross margin subtracts only cost of goods sold. Operating margin also subtracts operating expenses, so it shows profit from running the business.
What is a good operating margin?
Compare the same cost classification across periods and relevant peers. Business model, pricing, asset intensity and reporting policies affect the result. A single percentage threshold does not establish a healthy operation; reconcile operating income to the underlying revenue and expense records.
Does operating margin include interest?
No. It is measured before interest and taxes, so it shows the efficiency of operations independent of how the business is financed.