Margin vs Markup: The Difference That Kills Profit

Same profit, two denominators

An item costs $60 and sells for $100. Profit is $40. Now express that as a percentage:

Measure	Formula	Working	Result
Markup	profit ÷ cost	40 ÷ 60	66.7%
Margin	profit ÷ price	40 ÷ 100	40.0%

Identical transaction, identical $40 of profit, two very different percentages. Neither is wrong — but using one where the other was meant is expensive.

The conversion table

Markup	Margin	Margin	Markup
20%	16.7%	20%	25.0%
25%	20.0%	30%	42.9%
30%	23.1%	40%	66.7%
50%	33.3%	50%	100.0%
100%	50.0%	60%	150.0%

margin = markup ÷ (1 + markup)
markup = margin ÷ (1 − margin)
price for target margin = cost ÷ (1 − margin)

What the mistake costs

A business wants a 40% margin on a product costing $60, and prices it by adding 40% to cost.

	Intended	What they did
Method	$60 ÷ 0.60	$60 × 1.40
Price	$100.00	$84.00
Profit per unit	$40.00	$24.00
Actual margin	40.0%	28.6%

Profit per unit at 500 units sold

Priced at $100$20,000

Priced at $84$12,000

$8,000 of profit lost on one product line, from one formula

Price for a target margin instantly.Margin calculator →

Where it goes wrong in practice

Supplier conversations use markup, board reports use margin. The same "40%" travels between the two without anyone converting it.
Discounts hit margin disproportionately. A 10% discount off a 40% margin product does not leave 30% — it leaves 33.3%, because both profit and revenue moved. On a 20% margin product, a 10% discount removes half the profit.
Spreadsheet defaults. A column labelled "markup %" feeding a dashboard labelled "margin %" is a common and invisible error.

The quick mental check: margin can never reach 100%, because profit cannot exceed the selling price. Markup has no ceiling. If someone quotes a 150% margin, they mean markup.

Which to use where

Use margin for anything compared to revenue: gross margin, contribution margin, budgets, investor reporting. Use markup as the operational rule that converts a cost into a price on the shop floor.

Margin is also the input to the other number every business should know — the break-even point, which tells you how many units that margin must cover before you make anything at all.

Run your own numbers

Profit margin Break-even Percentage

FAQ

What is the difference between margin and markup?

Both compare profit to a number, but a different one. Markup is profit as a percentage of cost. Margin is profit as a percentage of the selling price. Since the price is always larger than the cost, the margin percentage is always smaller than the markup percentage.

Is a 50% markup the same as a 50% margin?

No. A 50% markup gives a 33.3% margin. To achieve a 50% margin you need a 100% markup — you must double the cost, not add half.

How do I convert markup to margin?

margin = markup ÷ (1 + markup). A 25% markup becomes 0.25 ÷ 1.25 = 20% margin. Going the other way, markup = margin ÷ (1 − margin), so a 40% margin needs a 66.7% markup.

How do I price for a target margin?

Divide the cost by (1 − target margin). For a $60 item at a 40% target margin: $60 ÷ 0.60 = $100. Adding 40% to the cost gives $84 and produces only a 28.6% margin.

Which should my business use?

Use margin for reporting, budgeting and comparing performance, because it relates directly to revenue. Use markup as the mechanical rule for setting prices from cost. The essential discipline is knowing which one a given number refers to.

Sources

Primary references used for the figures and rules on this page.

Calculate your startup costs — U.S. Small Business Administration
Fund your business — U.S. Small Business Administration