The Difference Between Markup and Margin
Why this matters
Two shops can use the same word, "I run 40 percent," and mean two different things, and one of them is quietly undercharging on every ticket. Markup and margin are both ways of talking about the profit built into a price, but they measure it against different starting points. Mixing them up is one of the most common and most expensive math errors in the trades. A shop that thinks its markup is its margin is thinner than it believes, sometimes badly.
The one difference that matters: what you divide by
- Markup is the profit measured against your COST. It answers: how much did I add on top of what this cost me?
- Margin is the profit measured against your PRICE. It answers: of the money the customer handed me, what share did I keep?
Same profit in dollars. Different denominator. Cost on the bottom for markup, selling price on the bottom for margin. Because the price is always bigger than the cost, the margin percentage is always smaller than the markup percentage for the same job. That gap is where shops get fooled.
A single job, two numbers
Take a job where your all-in cost is two-thirds of what you charge, so the profit is the remaining third of the price.
- As a margin, that is one-third of the price kept: a 33 percent margin.
- As a markup, you added half again on top of your cost to reach the price: a 50 percent markup.
Nothing about the job changed. The 50 and the 33 describe the exact same money. If someone tells you they "mark up 50" and you assume they keep half, you are already wrong by a third.
The conversion table to keep
| Markup on cost | Resulting margin on price |
|---|---|
| 20% | 16.7% |
| 25% | 20% |
| 33% | 25% |
| 50% | 33.3% |
| 67% | 40% |
| 100% | 50% |
Read it once and the pattern is clear: markup always looks bigger than the margin it produces, and the gap widens as the numbers climb. Doubling your cost (a 100 percent markup, the old "keystone") does not give you a 100 percent margin, it gives you 50.
The formulas, if you want them:
- Margin = markup divided by (1 plus markup)
- Markup = margin divided by (1 minus margin)
Why this costs real money
The danger is setting a markup because you want a margin. An owner decides "I need to keep 40 percent" and marks everything up 40 percent. But a 40 percent markup only yields about a 29 percent margin. Every job comes in eleven points light, and the overhead that was supposed to be covered is not. Do that across a year of work and the shortfall is not a rounding error, it is the difference between a healthy shop and one that cannot figure out why it is always short. To actually keep 40 percent of the price, you have to mark cost up about 67 percent.
Which one to run the business on
Use margin as the truth-teller and markup as the tool.
- Margin is the honest scorecard. It tells you what share of every sale you actually keep, it compares cleanly across jobs of any size, and it is what your profit and loss statement speaks in. Set your targets in margin.
- Markup is how you get there at the counter. It is easier to apply to a cost in the moment (cost times a number), so once you know the margin you need, convert it to the markup that produces it and price off that.
Set the target in margin, execute with the markup that hits it, and never confuse the two again.
References
- SBA, pricing and gross margin fundamentals for small business
- Standard managerial-accounting practice on markup, margin, and cost-plus pricing
- See related: Knowing Your True Cost Before You Set a Price, The Break-Even Number Every Owner Should Know