Business math
Margin vs. Markup: The Costly Mix-Up in Pricing
Published November 4, 2026 · 1 min read
A 50% markup is only a 33.3% profit margin. Confusing the two can quietly erase the profit you planned for.
Same profit, two percentages
Margin and markup both describe the gap between what something costs you and what you sell it for. The difference is what each percentage is measured against.
Markup = profit ÷ cost × 100
Margin = profit ÷ selling price × 100
Suppose a product costs $60 and sells for $90. Profit is $30. The markup is $30 ÷ $60 = 50%. The margin is $30 ÷ $90 = 33.3%. Same sale, same $30 — two different percentages.
Converting between them
Margin = markup ÷ (1 + markup) Markup = margin ÷ (1 − margin)
| Markup | Margin |
|---|---|
| 25% | 20.0% |
| 50% | 33.3% |
| 100% | 50.0% |
| 150% | 60.0% |
| 200% | 66.7% |
Margin can never reach 100% (that would mean zero cost), but markup has no upper limit.
Where the mix-up costs money
Imagine a seller who needs a 40% margin to cover overhead such as rent, software, and payment fees. If they add a 40% markup to a $60 cost, they charge $84. Their profit is $24, and their margin is only $24 ÷ $84 ≈ 28.6% — well short of the 40% they needed.
To hit a 40% margin, the price must be calculated from the target margin:
Price = cost ÷ (1 − target margin) = $60 ÷ 0.60 = $100
That is a 66.7% markup. The gap between $84 and $100 on every unit is the cost of confusing the two terms.
Practical habits
- Decide which term your team, supplier, or industry uses, and say it explicitly.
- Include every cost tied to a sale — shipping, packaging, platform fees, card fees — before calculating either figure.
- Remember discounts come off the selling price, so a 20% discount removes far more than 20% of your profit.
Sources & notes
- Worked examples computed by NumberChan from the standard margin and markup definitions.
This article is for general education and is not financial, tax, or legal advice.