Markup vs Margin: Same Profit, Two Very Different Percentages

Buy something for $60 and sell it for $100, and you’ve earned a 66.7% markup and a 40% margin at the same time — the identical $40 of profit, measured once against your cost and once against your selling price. They’re never equal, markup is always the bigger number, and mixing them up is one of the most expensive small mistakes in pricing. Compute both instantly for any cost and price in the markup & margin calculator; here’s the logic underneath.

One profit, two denominators

The whole confusion dissolves once you see that markup and margin ask the same question — how much profit? — but divide by different things:

• Markup looks backward at what you paid: profit as a percentage of cost.
• Margin looks at what you charged: profit as a percentage of selling price.

Since your cost ($60) is smaller than your price ($100), dividing the same $40 profit by the smaller number gives a bigger percentage. That’s the entire reason markup (66.7%) always exceeds margin (40%).

The four formulas you’ll actually use

Two to measure an existing price, two to set a price from a target:

You have	You want	Formula	Example
Cost & price	Markup %	(price − cost) ÷ cost	(100 − 60) ÷ 60 = 66.7%
Cost & price	Margin %	(price − cost) ÷ price	(100 − 60) ÷ 100 = 40%
Cost & target markup	Price	cost × (1 + markup)	60 × 1.667 = $100
Cost & target margin	Price	cost ÷ (1 − margin)	60 ÷ 0.60 = $100

Note the last two both land on $100 here — but only because 66.7% markup and 40% margin are the same deal expressed two ways. Feed a cost and a price into the markup & margin calculator and it returns the profit, both percentages, and the price/cost split in one go.

Converting between them

If you know one and want the other, you don’t need the cost and price at all:

margin = markup ÷ (1 + markup) · markup = margin ÷ (1 − margin)

Check it: a 66.7% markup → 0.667 ÷ 1.667 = 40% margin. A 50% margin → 0.5 ÷ 0.5 = 100% markup. That second one is worth remembering as a sanity anchor: doubling your money is a 100% markup but only a 50% margin.

The mistake that quietly eats profit

Here’s where real money leaks. Say your business runs on 40% margins and you’re pricing a new item that cost you $60. If you absent-mindedly apply a 40% markup instead:

• Wrong (40% markup): $60 × 1.40 = $84 → that’s only a 28.6% margin
• Right (40% margin): $60 ÷ 0.60 = $100 → a true 40% margin

You’d have underpriced by $16 on a single item — and believed you hit your target. Across a full catalogue, confusing markup for margin can wipe out a third of the profit you planned for. The fix is simply to be explicit about which basis a percentage refers to, and to let the calculator show both so the gap is impossible to miss.

A note on tax and the “keep” figure

Margin is the share of the selling price you keep as gross profit — before overheads, and before sales tax, which isn’t yours to keep at all. If your displayed price includes tax, strip it out before computing margin, or you’ll flatter your numbers. The sales tax calculator does that reverse step (price ÷ (1 + rate)) so your margin is measured on the real, pre-tax revenue.

Quick summary

Markup and margin are the same profit over different bases: markup divides by cost, margin divides by price. Because cost is the smaller number, markup is always the bigger percentage — $60→$100 is a 66.7% markup but a 40% margin. Convert with margin = markup ÷ (1 + markup), price from a target margin with cost ÷ (1 − margin), and never set a markup when you meant a margin (40% markup on $60 is only a 28.6% margin). Get every figure at once, privately in your browser, from the markup & margin calculator.

Sources: standard retail and accounting definitions of gross margin and markup · Investopedia — Margin vs. Markup · Corporate Finance Institute — Gross Margin.