Every platform quotes its fees in a different shape: Amazon takes a referral percentage plus a fulfillment fee, Etsy stacks listing, transaction, and payment charges, eBay bundles everything into a final value fee, and processors like Stripe and PayPal add a percentage plus a fixed few cents. These calculators normalize all of it to the two numbers that matter, dollars kept per sale and effective fee percentage.
Start where you sell. The Amazon FBA profit calculator covers the largest fee stack, with referral plus fulfillment fees typically claiming 25–40% of the sale price. The Etsy fee calculator and eBay fee calculator untangle those platforms’ compound charges, and the Stripe fee calculator handles direct-checkout processing on your own site.
Two habits pay for themselves. Compare platforms on effective take rate at your actual price point, because fixed per-order fees punish cheap items far more than expensive ones. And re-check the schedules yearly, because platforms adjust rates regularly; every calculator here uses editable rates with current US defaults, so a fee change never invalidates the tool.
Frequently asked questions
Which marketplace has the lowest seller fees?
At typical price points, eBay and Walmart usually take the least, roughly 13–15% all-in; Etsy lands around 10–13% before ads; Amazon FBA takes the most, commonly 25–40% once fulfillment is counted. But fees buy traffic: Amazon’s higher take often nets more profit than a cheaper marketplace with fewer buyers. Compare profit per unit at your real price, not fee tables.
How much does Amazon take from each sale?
Two fees hit every FBA sale: a referral fee of 15% of the price in most categories, and a fulfillment fee set by size and weight. For a typical $25–40 standard-size product, expect $9–14 in combined fees, about a third of the price. Storage, inbound placement, and returns processing add more, especially for slow-moving or oversize inventory.
Are PayPal and Stripe fees the same?
Nearly. Both charge US merchants roughly 2.9% plus $0.30 per online card transaction, with PayPal slightly higher on some products and both adding 1% or more for international cards or currency conversion. The fixed 30 cents is the part that hurts: on a $5 sale it is 6% by itself. Cheap items need bundling or a platform with lower fixed fees.
Why is my effective fee rate higher than the advertised rate?
Advertised rates exclude fixed per-order fees, payment processing stacked on top of marketplace fees, currency conversion, and charges you keep paying on refunded orders. A 15% headline rate routinely becomes 18–22% effective once those are counted. Divide total fees on your last settlement report by gross sales; that effective percentage is the only rate worth budgeting with.
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