Between the FBA fee, referral fee, and product cost, marketplace margins are thinner than they look. Enter your numbers to see true profit per unit — then cost every SKU with the full tool.
True profit and margin per SKU after all marketplace fees.
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Two big ones plus your cost: the fulfilment (FBA) fee, which depends on size and weight, and the referral fee, a percentage of the sale price (commonly around 15%, varying by category). On top of those sit your landed product cost and any storage or advertising costs. Together they can consume most of the price on a low-margin item, which is why calculating true profit per SKU matters.
Work backwards: your price has to cover your product cost, the fixed FBA fee, the percentage referral fee, and your target margin all at once. Because the referral fee is a percentage of price, it's easiest to solve with a calculator — enter your costs and target margin and let it find the minimum viable price. The paid tool does this for every SKU.
A ready-to-use spreadsheet (Excel & Google Sheets): true profit and margin per SKU after FBA and referral fees, a multi-SKU register, and a minimum-price finder for your target margin — delivered instantly after checkout. AI-assisted, human-built; not financial advice.
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