Profit Margin vs Markup: Formulas, Differences, and Conversion

Margin vs markup: the quick answer

Profit margin and markup both measure the profit on a sale, but they divide it by a different number. Profit margin divides profit by selling price; markup divides the same profit by cost. Because the denominators are different, a markup percentage and a margin percentage are never equal to each other except at 0% — and the gap between them grows as the percentage grows. A 50% markup on cost, for example, is only a 33.3% margin on the resulting price, not 50%.

Definitions

Profit margin is profit expressed as a percentage of revenue (selling price): it answers "of every dollar a customer pays, how much is profit?"

Markup is profit expressed as a percentage of cost: it answers "how much did we add on top of what this cost us?" Markup is the number most cost-plus pricing rules are built around, since it starts from a known cost and works forward to a selling price.

Profit margin formula

Profit = Selling price − Cost
Profit margin % = Profit ÷ Selling price × 100

Use the dedicated Profit Margin Calculator for revenue and total cost, or the Gross Margin Calculator when you specifically mean revenue minus cost of goods sold (COGS) at the product-line level.

Markup formula

Markup amount = Selling price − Cost
Markup % = Markup amount ÷ Cost × 100

Use the Markup Calculator to go from cost and selling price straight to markup percentage and the equivalent margin percentage.

Why a 50% markup is not a 50% margin

Take an item that costs $80. Marking it up 50% adds $40, for a selling price of $120. The profit is still $40 either way you measure it — but as a share of the $120 price, that $40 is only 33.3% ($40 ÷ $120 × 100), not 50%. The 50% figure is only true relative to the smaller number, cost. This is not a rounding issue or an error in either formula; margin and markup are answering two different questions about the same $40 of profit, using two different bases.

Worked example 1: cost-plus pricing

A distributor prices a component using a 25% markup on cost:

• Cost = $240
• Markup % = 25%

Markup amount = $240 × 25% = $60
Selling price = $240 + $60 = $300
Profit margin = $60 ÷ $300 × 100 = 20%

A 25% markup produces a 20% margin, not 25% — the same pattern as the example above, just at a smaller percentage where the gap is narrower.

Worked example 2: reporting margin from a set price

A retailer sells a product for $45 that costs $18, and wants to report both figures for a pricing review:

• Cost = $18
• Selling price = $45

Profit = $45 − $18 = $27
Markup % = $27 ÷ $18 × 100 = 150%
Profit margin % = $27 ÷ $45 × 100 = 60%

At high percentages the gap becomes large: a 150% markup is "only" a 60% margin. Quoting the wrong one of these two numbers in a report can make a product line look far more or far less profitable than it is.

Converting between margin and markup

Both conversions follow directly from the two formulas above and require no other information:

Markup % → Margin % : Margin = Markup ÷ (100 + Markup) × 100
Margin % → Markup % : Markup = Margin ÷ (100 − Margin) × 100

The margin-to-markup formula is undefined at a 100% margin (division by zero), because a 100% margin means the cost is $0 — there is no cost base left to express a markup against.

Markup vs margin comparison table

Margin and markup start close together at low percentages and diverge further apart as the percentage increases — they never converge again past 0%.

Common pricing mistakes

• Setting a margin target but applying it as a markup. Aiming for a "40% margin" by adding a 40% markup on cost actually produces a 28.6% margin — a common way profitability quietly comes in below target.
• Assuming the two figures converge at high percentages. The opposite is true: the dollar gap between markup % and margin % widens as both numbers grow, as the table above shows.
• Mixing scopes. Markup and profit margin (this guide) use whatever "cost" you define; gross margin specifically uses cost of goods sold (COGS). Comparing a company-wide profit margin against a single product's gross margin is comparing two different scopes, not two different formulas.
• Reporting one figure without labeling it. A bare percentage in a pricing sheet or report is ambiguous unless it says "markup" or "margin" — the same deal can honestly be described as either a 50% markup or a 33.3% margin.

Which one should you use?

Use markup when you're setting a selling price from a known cost — cost-plus pricing, vendor cost negotiations, or quoting a price directly off a bill of materials. Use margin when you're reporting or comparing profitability — margin is what most financial statements, profitability dashboards, and industry benchmarks are expressed in, because it's a percentage of the revenue actually collected. Use gross margin specifically when the cost side is COGS at the product or product-line level rather than a general total cost figure.

Try the Profit Margin Calculator, the Markup Calculator, or the Gross Margin Calculator with your own numbers to see both figures side by side.