Why a 50% markup is not a 50% margin

Start with a simple example

A product costing 40 with a 50% markup sells for 60. Its gross profit is 20. Divide that profit by the 60 selling price: the margin is only 33.33%. To earn a 50% margin on 40 cost, the price must be 80.

Use the right denominator

Markup starts from cost: profit divided by cost. Margin starts from revenue: profit divided by selling price. Margin is useful when comparing the share of revenue available to cover overhead. Markup is useful when constructing a price from cost.

Keep taxes consistent

Do not compare a tax-inclusive selling price with a tax-exclusive cost. Use the same basis for both and get your tax treatment reviewed for your business. The tool does not calculate VAT or sales tax.

Gross margin is not take-home profit

Gross profit still needs to cover fixed costs and any acquisition costs not included in the input. Follow up with the break-even calculator or reverse planner.

Convert a target margin into a selling price

The pricing formula is cost / (1 − target margin). Express the percentage as a decimal: a 40% target uses 0.40. With 40 cost, the exact price is 66.666…; pricing at 66.67 gives approximately 40.003% margin. Rounding the price down to 66.66 puts it slightly below 40%.

For a positive cost, a 100% margin cannot be reached at any finite price. A zero-cost item is a separate case: markup has a zero denominator, even if the selling price is positive. Do not replace an undefined markup with zero.

See what a discount does to the same item

Start with a price of 80 and cost of 40. Profit before other expenses is 40, or a 50% margin. A 20% discount changes the price to 64, leaving 24 and a 37.5% margin. The price fell 20%, but unit profit fell 40%.

To preserve 4,000 of gross profit earned on 100 full-price units, the discounted offer needs 4,000 / 24 = 166.67 units, rounded up to 167. That comparison assumes the same unit cost and no extra campaign expenses. More revenue alone would not prove that the discount worked.

Decide which costs belong in this comparison

For a product pricing exercise, purchase cost may be the starting point. For a service, the direct cost of delivery may be more relevant. If payment fees, commissions or packaging are left out, the resulting margin does not describe all contribution available for overhead.

Write a short cost definition next to the result. When comparing offers, apply that definition consistently. A service margin calculated before delivery labour should not be compared with a product margin that includes every variable fulfilment expense.

Use a repeatable pricing check

First confirm the cost and selling price use the same currency and tax basis. Next calculate both the cash amount per sale and the percentage. Then model expected volume and fixed costs to see whether the period produces enough total profit. Finally test a discount or a cost increase.

A margin percentage is not a complete pricing strategy. Customer alternatives, the scope of the offer and capacity also matter. Keep observed sales separate from estimated demand so an attractive percentage is not mistaken for evidence that customers will buy.

Try the numbers yourself

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