Profit Margin vs Markup: What's the Difference and How to Calculate Both

Profit margin and markup are both calculated from the same two numbers — cost and selling price — but they answer different questions, and mixing them up is one of the most common pricing mistakes new business owners make.

Markup

Markup measures how much you've added on top of your cost.
Formula: Markup % = (Selling Price − Cost) / Cost × 100

If something costs you ₹100 and you sell it for ₹150, your markup is (150 − 100) / 100 × 100 = 50%.

Profit margin

Margin measures how much of the final selling price is actual profit.
Formula: Margin % = (Selling Price − Cost) / Selling Price × 100

Using the same example, ₹50 profit on a ₹150 selling price is (150 − 100) / 150 × 100 ≈ 33.3% margin — a noticeably different number from the 50% markup, even though it's describing the exact same transaction.

Why the gap grows at higher percentages

The difference between markup and margin isn't fixed — it widens as the percentage increases. A 25% markup corresponds to a 20% margin, but a 100% markup corresponds to only a 50% margin, and a 300% markup is still just a 75% margin. This is a common source of confusion for anyone assuming the two numbers track closely together — they diverge fast, especially on higher-margin products like software, services, or luxury goods.

Converting between the two

If you know one, you can calculate the other without starting over:
Margin % = Markup % / (100 + Markup %) × 100
Markup % = Margin % / (100 − Margin %) × 100

So a 50% markup converts to 50 / 150 × 100 ≈ 33.3% margin, matching the example above.

Why the difference matters for pricing

If you're setting prices based on a target margin — say, you need a 40% margin to hit your profitability goals — using a 40% markup instead will consistently undershoot that goal. A 40% markup only produces about a 28.6% margin, a meaningful gap if you're relying on that margin to cover fixed costs. Confusing the two isn't just a semantic slip; it can mean underpricing a product without realizing it until the numbers don't add up at the end of a quarter.

Quick rule of thumb

Markup will always be a larger number than margin for the same transaction, except at 0%, where they're equal. When in doubt, check which formula a spreadsheet, calculator, or supplier quote is actually using before setting prices — the label "margin" or "markup" is sometimes used loosely even when the underlying calculation is the other one.

Calculate both instantly

Rather than converting by hand, use the Discount & Markup Calculator to go from cost and a desired markup (or margin) straight to a final price, or work out the percentage between two prices you already have. If you're setting prices to cover fixed costs specifically, the Break-Even Calculator shows how many units you need to sell at a given price before you start turning a profit.