Margin vs. Markup: Why They're Never the Same Number
Why a 50% markup is only a 33% margin, how to convert between the two, and which one to use for pricing vs. reporting.
Margin and markup both describe the same profit, but as a percentage of two different numbers — and confusing the two is one of the most common, and most costly, pricing mistakes a small business can make.
The two formulas
- Markup % = profit ÷ cost. "How much did I add on top of what I paid?"
- Margin % = profit ÷ sale price. "What percent of what the customer paid is profit?"
Because sale price is always bigger than cost (assuming you're profitable), dividing by sale price always gives a smaller percentage than dividing by cost. Margin is always less than markup for the same sale, and the gap widens as the percentage grows.
| Markup % | Equivalent margin % |
|---|---|
| 10% | 9.1% |
| 25% | 20% |
| 50% | 33.3% |
| 100% | 50% |
| 300% | 75% |
Why the mix-up is expensive
If you mean to keep a 50% margin but accidentally apply a 50% markup instead, you'll actually only be keeping a 33.3% margin — a real, recurring shortfall on every sale, not a rounding error. This is especially costly at scale, where the gap compounds across thousands of transactions.
Which one to use
Markup is the more intuitive number for setting a price ("I paid $30, I'll add 50% and sell for $45"). Margin is the more useful number for business planning and reporting, since "30% of revenue is profit" is directly comparable across products, competitors, and time periods regardless of what each item costs.
The Margin / Markup Calculator converts between the two automatically, so pricing in markup and reporting in margin never requires manual math.