Finance · 4 min read
Profit Margin vs Markup: The Pricing Mistake That Costs Sellers
Margin and markup both describe the same profit. The difference is what you divide it by. Markup divides profit by what the item cost you. Margin divides it by the price you sold it for. Because cost is always the smaller number, markup is always the bigger percentage, and mixing them up is how a lot of small sellers end up earning less than they think.
The same sale, two different percentages
Say you buy a candle for $40 all-in and sell it for $65. Your profit is $25.
- Markup: $25 ÷ $40 = 62.5%
- Margin: $25 ÷ $65 = 38.5%
Neither number is "wrong". They just answer different questions. Markup tells you how much you added on top of cost. Margin tells you how much of every sale you actually keep. When an accountant, a lender or an investor talks about your margins, they mean the second one.
Where it goes wrong
Here's the classic mistake. You read that businesses like yours need a 40% margin to cover overheads, so you take your $40 cost and add 40%. That gives a price of $56 and a $16 profit.
But $16 ÷ $56 is a 28.6% margin, not 40%. You've quietly given away more than a quarter of the margin you were aiming for, on every single sale. If rent, software and card fees were budgeted on the assumption of 40%, the gap comes out of your pocket.
To actually hit a 40% margin you need to divide, not add: $40 ÷ (1 − 0.40) = $66.67.
The formulas
- Profit = price − cost
- Markup % = profit ÷ cost × 100
- Margin % = profit ÷ price × 100
- Price for a target margin = cost ÷ (1 − margin)
- Price for a target markup = cost × (1 + markup)
- Convert markup to margin: margin = markup ÷ (1 + markup)
- Convert margin to markup: markup = margin ÷ (1 − margin)
Or skip the algebra and use the profit margin calculator, which does every direction and flags when a price is below cost.
Markup to margin cheat sheet
| Markup | Equals a margin of |
|---|---|
| 20% | 16.7% |
| 25% | 20% |
| 40% | 28.6% |
| 50% | 33.3% |
| 66.7% | 40% |
| 100% | 50% |
| 200% | 66.7% |
One thing jumps out: a 100% markup, or "keystone" pricing in retail, only gets you a 50% margin. And no amount of markup ever gets you to a 100% margin, because that would mean the item cost you nothing.
Which one should you use?
Use markup when you're setting prices quickly from a supplier's cost list. It's intuitive: cost plus a bit. Use margin when you're checking whether the business works, because your overheads, taxes and profit all come out of revenue, and margin is measured against revenue.
A practical habit: decide your target margin first, then convert it to the markup you'll apply day to day. If you want a 35% margin, that's a 53.8% markup. Write that number on a sticky note by the till.
Don't forget the hidden costs
The "cost" in these formulas should be your full landed cost, not just the supplier invoice. For an online seller that usually includes:
- Inbound shipping and import duties
- Packaging and labels
- Payment processing fees (often around 3% of the sale)
- Marketplace fees if you sell on Etsy, Amazon or eBay
- Outbound shipping you don't charge the customer for
Leave these out and your spreadsheet margin will look healthy while your bank balance tells a different story. If you're pricing a product from scratch, cost-plus pricing walks through a full build-up.
The takeaway
If someone quotes you a percentage, ask "of cost or of price?" It's a small question that saves real money. And when you set a price for a target margin, divide by (1 − margin). Adding the percentage on top will always leave you short.
Frequently asked questions
What is the difference between margin and markup?
Markup is profit divided by cost; margin is profit divided by selling price. The same sale always has a higher markup than margin.
Is a 50% markup the same as a 50% margin?
No. A 50% markup equals a 33.3% margin. To get a 50% margin you need a 100% markup, meaning you double the cost.
How do I price something for a 30% margin?
Divide the cost by 0.70. A $21 cost needs a $30 price for a 30% margin.
Should I use margin or markup?
Markup is handy for quick pricing from costs; margin is better for judging whether the business covers its overheads and makes a profit.