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Margin vs. Markup: The Mistake That Costs You on Every Job

May 27, 2026 · 6 min read

Ask ten service business owners the difference between margin and markup and most will shrug — they use the words interchangeably. That shrug is expensive. Treating a markup like a margin means you earn less than you planned on every single job, and it compounds all year.

Short answer: Markup is profit measured against your cost; margin is profit measured against your selling price. They are not interchangeable — a 30% markup works out to about a 23% margin. If you want to keep 30% of every sale, you need roughly a 43% markup.

The two definitions

Both describe profit. The difference is what they measure profit against.

Markup is profit as a percentage of your cost.
Margin is profit as a percentage of your selling price.

That small distinction changes the math completely.

Let's run the numbers

Say a job costs you $100 to deliver.

You add a 30% markup: 30% of your $100 cost is $30, so you charge $130.

Now, what's your margin on that sale? Your $30 profit divided by the $130 price is 23%. Not 30%.

A 30% markup = about a 23% margin. They are not the same number.

If you actually wanted to keep 30% of the sale — a true 30% margin — you'd need to charge about $143, not $130. That $13 difference per job is pure profit you left on the table because you used the wrong percentage.

Why this quietly drains you

Here's the trap: most people think in markup (it's easier — just add a percentage to cost) but want a margin (that's what actually shows up in the bank). So they set a "30%" and assume they're keeping 30%. They're keeping 23%. On a business doing $200,000 a year, that gap is tens of thousands of dollars — gone, unnoticed.

A quick conversion cheat sheet

If you know the markup and want to know the real margin:

• 20% markup → 16.7% margin
• 30% markup → 23.1% margin
• 50% markup → 33.3% margin
• 100% markup → 50% margin

And going the other way — the markup you need to hit a target margin:

• To earn a 30% margin → mark up 42.9%
• To earn a 40% margin → mark up 66.7%
• To earn a 50% margin → mark up 100%

Which should you use?

Most established businesses think in margin, because it answers the question that actually matters: "of every dollar a client pays me, how much do I keep?" Markup is fine as a mental shortcut — as long as you remember it's not the same as your margin, and you've done the conversion.

The safest approach is to stop converting in your head entirely. Decide the margin you need to run a healthy business, and let your pricing tool work backward to the price. SolidScope lets you set margin or markup explicitly and shows you both on every quote — so you always know exactly what you're keeping.

Keep reading: What is burdened labor cost, and why it's killing your margins →