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Product Pricing for Marketplace Calculator

Enter cost, shipping, fees and target margin to get the price you should list.

How it is calculated

Everything percentage-based is taken from the selling price, so the tool solves for the price itself: price = (item_cost + shipping_cost) ÷ (1 − (marketplace_fee% + payment_fee%) ÷ 100 − margin% ÷ 100). Fees are price × fee share and net profit is price × margin%, which means the margin is a share of the selling price, not a markup on cost. The break-even price uses the same formula with a zero margin. Costs are in one currency, percentages are entered as plain numbers (15 for 15%). If fees plus margin reach 100% or more, no price can cover them and no result is shown. Shipping is treated as a cost you pay, not something charged on top.

Worked example

An item costs 18 and shipping is 4.50, so the base cost is 22.50. The marketplace fee is 15% and the payment fee 3%, a combined 18%; the target margin is 20%. Denominator: 1 − 0.18 − 0.20 = 0.62. List price: 22.50 ÷ 0.62 = $36.29. Fees: 36.29 × 18% = $6.53. Net profit: 36.29 × 20% = $7.26. Break-even price (no profit): 22.50 ÷ 0.82 = $27.44.

Try this example →

Common mistakes

  • Adding the margin to the fee percentage and then multiplying cost by 1.38. Fees and margin are shares of the selling price, so the correct divisor is 1 − 0.38, which gives a higher price than the markup shortcut.
  • Entering the margin you want as a markup on cost. Here a 20% margin means profit is 20% of the price, which is a larger markup (about 32% on the base cost in the example).
  • Forgetting a fixed per-order fee. Only percentage fees are modelled, so a flat fee or closing fee must be added to the cost or shipping field.
  • Leaving out the payment processor percentage because the marketplace already shows one fee; the two are separate inputs and both reduce what you keep.

About this calculator

Selling on a marketplace means working backward from your costs to a list price that survives every fee taken out along the way: item cost, shipping, the marketplace’s referral or category fee (commonly around 8–15% on platforms like Amazon or Etsy), payment processing fees, and finally your own target profit margin. The formula rearranges into price = (item cost + shipping) divided by (1 − fee percentage − margin percentage), so the price absorbs every percentage-based deduction before margin is even counted.

Sellers who price by simply adding a margin on top of cost routinely underprice themselves once marketplace and payment fees are subtracted, only discovering the shortfall when their real margin turns out thinner — or negative — after a sales report. Getting the back-calculation right the first time avoids relisting products at a loss.

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