Markup, Margin & VAT Calculator

Markup and margin both describe the gap between what something costs you and what you sell it for, but they measure it against different bases, and treating them as interchangeable quietly bleeds profit. Markup is your profit as a percentage of cost. Margin is the same profit as a percentage of the selling price. Because the price is always larger than the cost, the margin is always the smaller of the two figures.

Buy an item for $100 and add a 50% markup: you sell at $150 and make $50. That $50 is a 50% markup on the $100 cost, but only a 33.3% margin on the $150 price. If your business plans around a 50% margin and you set prices with a 50% markup, every sale comes in a third short of where you thought it was — an error that compounds across a whole catalogue.

To hit a target margin you have to work from the price down, not the cost up. The formula is price = cost ÷ (1 − margin). A 40% margin on a $60 cost means a $100 price (60 ÷ 0.60), which is a 66.7% markup. The calculator shows both numbers side by side in every mode precisely so you never have to convert between them in your head.

The three modes on one $100 cost, plus a VAT example:

Reverse VAT is the mode people get wrong most often. To remove 20% VAT from a $120 gross price you divide by 1.20, you do not subtract 20%. Dividing gives $100 net and $20 of VAT; subtracting would give $96 and quietly overstate the tax by four dollars on every line. The rule generalises: strip VAT by dividing by (1 + the rate), add it by multiplying.

The forward direction is the easy one — a $100 net price at 20% VAT is simply $120 gross — but the reverse is what you need when you are backing the tax out of a receipt total, or quoting a client an inclusive price from a net cost.

Most pricing tasks map cleanly onto one of the three modes. Reach for Markup when you buy at a known cost and want a price by applying a standard uplift — the classic retail and wholesale move. Reach for Margin when the constraint is the other way round: you need each sale to retain a fixed percentage to cover overheads and profit, so you solve for the price that delivers it. And reach for VAT whenever tax has to be added to a quote or removed from a total.

The modes chain together in real work. A shop might set prices by margin to protect profitability, then present them VAT-inclusive to consumers, then reverse the VAT at bookkeeping time to report the net sales. Doing each step in the matching mode, rather than eyeballing percentages, is what keeps the figures consistent from the price tag to the tax return.

The tool works in any currency and at any rate, so it fits a 5% sales tax, a 20% UK VAT or a 15% GST equally. For the actual rate that applies where you trade, the companion VAT-rates table lists them by country.

The calculator does the arithmetic exactly; it does not know your local tax rules, and those are where the real complexity lives. VAT and sales-tax systems differ on what is taxable, which reduced rates apply to which goods, when you must register, and whether you can reclaim the tax you pay on purchases. A correct division by 1.20 is still the wrong answer if the rate should have been the reduced one, or if the sale is exempt.

It also treats cost as a single figure. In practice a product's true cost may fold in shipping, payment-processing fees, returns and storage, and a markup that looks healthy against the purchase price alone can vanish once those are counted. Feed the fully-loaded cost in, not just the invoice price, or the margin the tool reports will be optimistic.

Finally, the figures are estimates for pricing and planning, not a substitute for your accounts or professional tax advice. Confirm the VAT or sales-tax treatment that applies to your goods and territory before you rely on a number for an invoice or a filing.