Profit Margin Calculator

Profit margin and mark-up are two ways of describing the same fact — how much you make on a sale — but they are measured against different bases, and confusing them is one of the most common pricing mistakes.

Profit margin divides the profit by the selling price. If something costs ten dollars and sells for fifteen, the profit is five and the margin is thirty-three per cent. Mark-up divides the same profit by the cost, giving fifty per cent. The dollar figure is identical; the percentage is not, because margin is a share of revenue while mark-up is a multiple of cost. Quoting the wrong one can make a thin margin look healthy or a reasonable one look weak.

Why does it matter? Because margin is what actually stays with the business after the cost of the goods, and it must cover everything else — rent, wages, marketing, taxes. A product with a ten per cent margin can be profitable at high volume only if every other cost is tiny. A product with a fifty per cent margin has room to absorb overheads. When people say a business "runs on thin margins," they mean the gap between revenue and cost is narrow.

Pricing to a target margin is straightforward once you know the formula. To reach a fifty per cent margin on a twenty-four-dollar cost, you need to charge forty-eight dollars, not thirty-six — the second figure would give a fifty per cent mark-up but only a thirty-three per cent margin. Getting this backwards is how businesses under-price and wonder why the profit never appears.

Use the calculator to see all three figures at once and to test how a change in price or cost moves the margin. Watch the cost side too: a small rise in supplier prices can wipe out a slim margin entirely. This tool provides calculations for planning, not accounting or tax advice; consult a professional for business decisions.

This calculator returns estimates for general information only. It is not financial, investment, tax or legal advice, and it cannot replace guidance from a qualified professional who knows your circumstances. Figures such as loan payments, investment growth and retirement projections are simplified models based on the inputs and assumptions you provide, not guarantees of future results.