Gross Margin vs. Markup: What's the Difference?
Gross margin and markup both measure profit on a product — but they use different denominators, producing very different percentages for the same transaction. Confusing them is one of the most costly pricing mistakes in small business.
Gross Margin
Profit as a percentage of the selling price.
$100 cost, $150 price → Margin = 33.3%
Used in financial reporting, P&L statements, and industry benchmarking.
Markup
Profit as a percentage of the cost.
$100 cost, $150 price → Markup = 50%
Used in purchasing, pricing negotiations, and cost-plus pricing strategies.
Why Getting This Wrong Is Expensive
If you set a pricing target of "40% margin" but accidentally apply it as a 40% markup, you end up with only 28.6% margin. On a business doing $500,000 in annual revenue, that error costs $57,000 per year in lost profit — while the books still appear profitable.
The confusion happens because the dollar profit is identical. Only the denominator changes. Margin uses the selling price; markup uses the cost. Always clarify which metric is being discussed when setting pricing targets across a team.
Conversion Table
| Target Margin | Required Markup | Applied Markup | Resulting Margin |
|---|---|---|---|
| 20% | 25% | 20% | 16.7% |
| 25% | 33.3% | 25% | 20% |
| 33.3% | 50% | 33.3% | 25% |
| 40% | 66.7% | 40% | 28.6% |
| 50% | 100% | 50% | 33.3% |
The rightmost column shows what margin you actually get if you mistakenly apply the target margin as markup.