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Gross, operating and net margin: what each one tells you

There are three margins on a profit and loss statement, and each answers a different question. Here is one example, all three formulas and what to do with each number.

One example, all three margins

A small landscaping company had these numbers for the year (a hypothetical example):

Sales $400,000
Cost of goods sold (crew wages, materials, fuel for jobs) $240,000
Operating expenses (insurance, office, marketing, truck payments) $110,000
Interest and taxes $12,000

Gross margin: do the jobs themselves pay?

Gross margin = (sales − cost of goods sold) ÷ sales = ($400,000 − $240,000) ÷ $400,000 = 40%. It tells you whether the work earns enough before overhead. If gross margin is thin, the fix is pricing, labor hours or material costs.

Operating margin: does the business pay for itself?

Operating profit = gross profit − operating expenses = $160,000 − $110,000 = $50,000. Operating margin = $50,000 ÷ $400,000 = 12.5%. It shows what is left after the cost of running the company, before interest and taxes.

Net margin: what is left for you

Net profit = operating profit − interest and taxes = $50,000 − $12,000 = $38,000. Net margin = $38,000 ÷ $400,000 = 9.5%. It is the share of each sales dollar that is actually profit.

Where to find each number

  • Sales: top line of the profit and loss statement.
  • Cost of goods sold: costs that rise and fall with each job or sale: materials, direct labor, job-specific fuel.
  • Operating expenses: costs you pay whether or not you sell this month.
  • Interest and taxes: below operating profit.

Whether a cost belongs in cost of goods sold or operating expenses changes your gross margin, so keep it consistent from month to month. Ask your accountant how to classify yours.

In a spreadsheet

B1: Sales 400000 B2: COGS 240000 B3: Operating expenses 110000 B4: Interest and taxes 12000
B5: Gross margin: =(B1-B2)/B1
B6: Operating margin: =(B1-B2-B3)/B1
B7: Net margin: =(B1-B2-B3-B4)/B1

Which one to watch

Look at all three together. A strong gross margin with a weak operating margin means overhead is too heavy. A weak gross margin means the work is under-priced or running long. A fair net margin on falling sales can still be a warning, so compare each month to the last.

Hypothetical example, not an industry benchmark. See also: margin vs markup chart and how to calculate profit margin and markup.

Published by Groundwork Business Advisory. Updated October 27, 2026.

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