Operating Margin Calculator: Revenue & Expenses 2026

Is an operating margin of 25.00% healthy?

On the defaults — $1,000,000.00 of revenue and $750,000.00 of operating expenses — the operating margin is 25.00%, the operating income is $250,000.00, the revenue needed for a 20.00% margin is $937,500.00, and the most operating expense a 20.00% margin allows is $800,000.00. The operating margin — operating income divided by revenue — is the operating test: how much of each sales dollar survives the cost of running the business, before interest and taxes. Operating income is revenue minus operating expenses — the cost of goods sold plus selling, general and administrative costs — with interest and taxes left out. A margin above 20% is strong for most businesses; 10–20% is solid; below 5% is thin and leaves little room for a bad quarter. A negative margin means operating expenses exceed revenue — the business loses money on its core operations. A very high margin can also mean the business is under-investing — it is not spending to grow.

Four things about the model are worth stating plainly. First, the operating margin is the operating income divided by the revenue — $250,000.00 ÷ $1,000,000.00 = 25.00%. Second, the revenue needed at the target is the operating expenses divided by one minus the target — $750,000.00 ÷ (1 − 0.20) = $937,500.00. Third, the most operating expense allowed at the target is the revenue times one minus the target — $1,000,000.00 × (1 − 0.20) = $800,000.00. And fourth, the business keeps 25 cents of every sales dollar before interest and taxes — the margin is the operating test, not the bottom line; all listed in Accuracy & limitations.

The worked example, line by line

Setup: $1,000,000.00 of revenue, $750,000.00 of operating expenses, target margin 20.00%.

Line 1 — the operating income. The operating income is $1,000,000.00 − $750,000.00 = $250,000.00.

Line 2 — the operating margin. The operating margin is $250,000.00 ÷ $1,000,000.00 × 100 = 25.00%.

Line 3 — the revenue needed. The revenue needed for a 20.00% margin is $750,000.00 ÷ (1 − 0.20) = $937,500.00.

Line 4 — the most operating expense allowed. The most operating expense a 20.00% margin allows is $1,000,000.00 × (1 − 0.20) = $800,000.00.

Line 5 — the check. 25.00% × $1,000,000.00 = $250,000.00, the operating income; and $750,000.00 + $250,000.00 = $1,000,000.00, the revenue.

Every branch, checked

Revenue $1,250,000: Operating margin 40.00%; operating income $500,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $1,000,000.00 — With revenue of $1,250,000.00 the margin rises to 40.00% — the business keeps 40 cents of every sales dollar.

Operating expenses $900,000: Operating margin 10.00%; operating income $100,000.00; revenue needed for the 20.00% target $1,125,000.00; most operating expense allowed at the 20.00% target $800,000.00 — With operating expenses of $900,000.00 the margin falls to 10.00% — the bottom of the solid band.

Revenue $800,000: Operating margin 6.25%; operating income $50,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $640,000.00 — With revenue of $800,000.00 the margin falls to 6.25% — above the 5% thin line, but only just.

Operating expenses $500,000: Operating margin 50.00%; operating income $500,000.00; revenue needed for the 20.00% target $625,000.00; most operating expense allowed at the 20.00% target $800,000.00 — With operating expenses of $500,000.00 the margin rises to 50.00% — half of every sales dollar survives operations.

Revenue $2,000,000: Operating margin 62.50%; operating income $1,250,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $1,600,000.00 — With revenue of $2,000,000.00 the margin rises to 62.50% — strong, and worth asking whether the business is under-investing.

Operating expenses $1,000,000: Operating margin 0.00%; operating income $0.00; revenue needed for the 20.00% target $1,250,000.00; most operating expense allowed at the 20.00% target $800,000.00 — With operating expenses of $1,000,000.00 the margin is 0.00% — break-even on operations, nothing left for interest or tax.

Revenue $600,000: Operating margin -25.00%; operating income $−150,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $480,000.00 — With revenue of $600,000.00 the margin is -25.00% — a loss on operations: the business loses 25 cents of every sales dollar before interest and taxes.

The reverses, worked backwards

Smallest whole-dollar revenue for the margin to reach 20.00%: At the displayed $937,500 the figures are Operating margin 20.00%; operating income $187,500.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $750,000.00. At the displayed $937,500 the operating margin is 20.00%. At $937,499 the revenue is $1 short of the $937,500 needed — and the unrounded margin is 19.999915 approximately, which displays as 20.00% after rounding, so $937,500 is the smallest whole-dollar revenue for the margin to reach 20.00%.

Smallest whole-dollar revenue for the margin to reach 30.00%: At the displayed $1,071,429 the figures are Operating margin 30.00%; operating income $321,429.00; revenue needed for the 30.00% target $1,071,428.57; most operating expense allowed at the 30.00% target $750,000.30. At the displayed $1,071,429 the operating margin is 30.00% (unrounded 30.000028%). At $1,071,428 the revenue is $1 short of the $1,071,429 needed — and the unrounded margin is 29.999963 approximately, which displays as 30.00% after rounding, so $1,071,429 is the smallest whole-dollar revenue for the margin to reach 30.00%.

Largest whole-dollar operating expense for the margin to STAY at or above 20.00%: At the displayed $800,000 the figures are Operating margin 20.00%; operating income $200,000.00; revenue needed for the 20.00% target $1,000,000.00; most operating expense allowed at the 20.00% target $800,000.00. At the displayed $800,000 the operating margin is 20.00%. At $800,001 the operating expense is $1 over the $800,000 allowed — and the unrounded margin is 19.999900 approximately, which displays as 20.00% after rounding, so $800,000 is the largest whole-dollar operating expense for the margin to stay at or above 20.00%.

Largest whole-dollar operating expense for the margin to STAY at or above 10.00%: At the displayed $900,000 the figures are Operating margin 10.00%; operating income $100,000.00; revenue needed for the 10.00% target $1,000,000.00; most operating expense allowed at the 10.00% target $900,000.00. At the displayed $900,000 the operating margin is 10.00%. At $900,001 the operating expense is $1 over the $900,000 allowed — and the unrounded margin is 9.999900 approximately, which displays as 10.00% after rounding, so $900,000 is the largest whole-dollar operating expense for the margin to stay at or above 10.00%.

Smallest whole-dollar revenue for the margin to reach 40.00%: At the displayed $1,250,000 the figures are Operating margin 40.00%; operating income $500,000.00; revenue needed for the 40.00% target $1,250,000.00; most operating expense allowed at the 40.00% target $750,000.00. At the displayed $1,250,000 the operating margin is 40.00%. At $1,249,999 the revenue is $1 short of the $1,250,000 needed — and the unrounded margin is 39.999952 approximately, which displays as 40.00% after rounding, so $1,250,000 is the smallest whole-dollar revenue for the margin to reach 40.00%.

Smallest whole-dollar revenue for the margin to reach 15.00%: At the displayed $882,353 the figures are Operating margin 15.00%; operating income $132,353.00; revenue needed for the 15.00% target $882,352.94; most operating expense allowed at the 15.00% target $750,000.05. At the displayed $882,353 the operating margin is 15.00% (unrounded 15.000006%). At $882,352 the revenue is $1 short of the $882,353 needed — and the unrounded margin is 14.999909 approximately, which displays as 15.00% after rounding, so $882,353 is the smallest whole-dollar revenue for the margin to reach 15.00%.

A warning about the neighbours: every neighbour above shows as the target when rounded to two decimals, but its unrounded margin is short of the target. A lender underwriting on the unrounded margin would still say no. The page prints the unrounded neighbour value in full so the rounding does not mislead you.

What the defaults assume

The defaults are $1,000,000.00 of revenue, $750,000.00 of operating expenses and a target margin of 20.00% — Operating margin 25.00%; operating income $250,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $800,000.00. With Revenue $1,250,000, Operating margin 40.00%; operating income $500,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $1,000,000.00. With Operating expenses $900,000, Operating margin 10.00%; operating income $100,000.00; revenue needed for the 20.00% target $1,125,000.00; most operating expense allowed at the 20.00% target $800,000.00. With Revenue $800,000, Operating margin 6.25%; operating income $50,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $640,000.00. With Operating expenses $500,000, Operating margin 50.00%; operating income $500,000.00; revenue needed for the 20.00% target $625,000.00; most operating expense allowed at the 20.00% target $800,000.00. With Revenue $2,000,000, Operating margin 62.50%; operating income $1,250,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $1,600,000.00. With Operating expenses $1,000,000, Operating margin 0.00%; operating income $0.00; revenue needed for the 20.00% target $1,250,000.00; most operating expense allowed at the 20.00% target $800,000.00. With Revenue $600,000, Operating margin -25.00%; operating income $−150,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $480,000.00. With Revenue $0, Operating margin — (undefined: no revenue to divide by); operating income $−750,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $0.00. With Operating expenses $0, Operating margin 100.00%; operating income $1,000,000.00; revenue needed for the 20.00% target $0.00; most operating expense allowed at the 20.00% target $800,000.00. With Revenue $123,456, operating expenses $98,765, Operating margin 20.00%; operating income $24,691.00; revenue needed for the 20.00% target $123,456.25; most operating expense allowed at the 20.00% target $98,764.80. With Operating expenses $1,250,000, Operating margin -25.00%; operating income $−250,000.00; revenue needed for the 20.00% target $1,562,500.00; most operating expense allowed at the 20.00% target $800,000.00. With Revenue $10,000,000, Operating margin 92.50%; operating income $9,250,000.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $8,000,000.00. With Revenue $750,001, operating expenses $750,000, Operating margin 0.00%; operating income $1.00; revenue needed for the 20.00% target $937,500.00; most operating expense allowed at the 20.00% target $600,000.80. With Target bars — revenue $1,000,000, operating expenses $750,000, revenue needed at the 10.00% target $833,333.33; at the 30.00% target $1,071,428.57; most operating expense allowed at the 10.00% target $900,000.00; at the 30.00% target $700,000.00.

A note on the rounding: with revenue of $123,456 and operating expenses of $98,765 the unrounded margin is 19.999838, which rounds half-up to 20.00% — the page prints the unrounded value so the rounding does not mislead you. With revenue of $750,001 and operating expenses of $750,000 the unrounded margin is 0.000133, which rounds to 0.00%.

Output · formula · meaning

Who uses this

• The small-business owner checking the year: they learn $1,000,000.00 of revenue and $750,000.00 of operating expenses give a margin of 25.00% — and they check the $937,500 reverse to see the smallest revenue that still reaches 20.00%.
• The lender sizing a loan: they learn a margin above 20% is strong and 10–20% is solid — and they check the $800,000 reverse to see the largest operating expense that stays at or above 20.00%.
• The owner whose margin slipped to 10.00%: they learn the business is at the bottom of the solid band — and they check the $882,353 reverse to see the smallest revenue that reaches 15.00%.
• The founder with a 62.50% margin: they learn the business may be under-investing — and they check the $900,000 reverse to see the largest operating expense that stays at or above 10.00%.

Accuracy & limitations

The math is first-principles: the operating margin is the operating income divided by the revenue, rounded to two decimals half-up; the revenue needed at the target is the operating expenses divided by one minus the target; the most operating expense allowed at the target is the revenue times one minus the target. The reverses are judged on the UNROUNDED margin: a neighbour one dollar short shows as the target when rounded to two decimals, but its unrounded margin is below the target, so it does not meet the bar — the page prints the unrounded neighbour value in full. What the model cannot do is judge the business: operating income is revenue minus operating expenses — the cost of goods sold plus selling, general and administrative costs, with interest and taxes left out — and a lender will check how much of the earnings is cash and how stable it is; the 20% line is the usual line, not a rule, and some industries run happily below it; and the margin says nothing about the interest, the tax, or whether the business is profitable. Use it to see how much of each sales dollar survives running the business — then read the rest of the statements.

Frequently asked questions