Profit Margin vs Markup: Why Small Businesses Confuse Them

Profit margin vs markup comes down to what you divide by: both describe the same profit, but margin divides it by the selling price and markup divides it by the cost. That is why a 50% markup only produces a 33% margin. If you know your cost and are about to set a price, decide first which of the two you are aiming for, because adding a percentage to cost and expecting that same percentage as margin is how prices quietly end up too low.

The Difference in One Line

Margin is profit divided by the selling price. Markup is profit divided by the cost price. Both describe the same profit in money, but as a percentage of two different base numbers, which is exactly why they never match.

Written as formulas: margin = (price minus cost) divided by price, and markup = (price minus cost) divided by cost. Going the other way, when you know the cost and want a price, multiply the cost by (1 plus the markup), or divide it by (1 minus the margin). Those two lines are all the maths you need to set a selling price either way.

Worked Example

A job costs 50 to deliver, and you charge 75. Profit is 25. As a margin, that's 25 / 75 = 33.3%. As a markup, it's 25 / 50 = 50%. Same job, same 25 profit, two different-looking percentages depending on which base you divide by.

A second example: you know your cost, what do you charge?

A kitchen fitter buys a worktop for 1,200 and wants to make 40% on it. Read "40%" as a markup and the price is 1,200 x 1.4 = 1,680, a profit of 480. Read it as a margin and the price is 1,200 / 0.6 = 2,000, a profit of 800. The difference is 320 on a single item, and the fitter only finds out which one they meant when they look at the year's figures.

Neither answer is wrong. The mistake is thinking you set one when you actually set the other. If your overheads and income plan were worked out as a percentage of sales, that is a margin, and 2,000 is the price you need.

Margin and markup side by side

These pairs describe the same price. Keep the table handy when a supplier talks in markup and your accountant talks in margin.

Which One Should You Target

Margin is generally the more useful number to plan around, since it directly tells you what share of each sale is profit versus cost, which is what actually funds your own income and overheads. Markup is more useful when you're thinking in terms of "how much do I add on top of what I paid." For a job with labour and overheads as well as materials, our guide on how to price a job builds the full cost first and then applies the margin.

Here is why margin is the safer target. Say your rent, insurance, phone and software come to about 25% of what you sell in a year. A 25% markup on your costs gives you a 20% margin, which doesn't even cover those overheads, let alone pay you. Planning in margin makes that gap visible before you quote, because your overheads and your profit are both being measured against the same number: the price the client pays.

Once profit margin vs markup is clear in your head, our margin calculator shows both figures side by side from your cost and price, so you can see which one you are really charging before you quote.