Marketplace Commission Calculator

Marketplace fees stack: a commission or referral fee on the sale price, payment processing (sometimes bundled into that commission, sometimes charged separately), a per-item listing fee on some platforms, and advertising where it is used. Platforms bundle these differently, one folding processing into its commission, another charging it on top, a third adding a fixed per-order amount, so comparing headline commission rates alone understates the gap between them. Total take rate is the comparable number.

50 sale × 15% commission + 3% payment + 5% ads + 1 listing = 7.50 + 1.50 + 2.50 + 1 = 12.50 total fees, a 25% take rate. Net revenue 37.50. At that take rate, gross margin has to cover the fees and everything after them, meaning packaging, shipping, returns and overhead, before anything is left.

Published schedules differ by platform, category and marketplace region, so the rates that apply to one account are the ones to enter. Amazon and eBay both publish theirs, and each structures the bundle differently. Sellers pull on a few levers: higher-margin or differentiated products, bundles that lift order value above the fixed per-item fees, own-brand products where the margin is set in-house, and ad spend, which adds to the take rate whenever it is used. Marketplaces supply discovery and buyer trust; an owned storefront trades those for lower fees and traffic funded some other way.

Quick example

With sale price of 50, commission of 15%, payment fee of 3%, ads of 5% and a listing fee of 1, total fees come to 12.50. That is 7.50 of commission, 1.50 of payment processing, 2.50 of advertising and the 1 listing fee, leaving net revenue of 37.50 and a take rate of 25%.

Which inputs matter most

Five inputs, and the three percentage fields behave identically to each other. A percentage point added to Commission %, to Payment Fee % or to Ads % of Sale produces exactly the same answer: fees of 13.00 and a take rate of 26.00% in all three cases. Commission dominates the total only because its level is higher, at 15% against 3% and 5%, not because a point of it costs more.

Sale Price is the largest mover in practice, since a 10% rise takes fees from 12.50 to 13.65. It also works in the opposite direction on the take rate, which falls slightly from 25.00% to 24.82%, because the fixed listing fee is spread over more money. Listing Fee is the smallest lever at this price, worth 2 percentage points of the take rate at a sale of 50, and switching it off entirely takes the rate from 25.00% to 23.00%.

What’s happening under the hood

Total fees are the sale price multiplied by the three percentages added together, plus the fixed listing fee. Net revenue is the sale price less those fees, and the take rate is the fees divided by the sale price. The three percentage components are applied additively to the same base rather than in sequence, so none of them compounds on another.

Running it across a product range

Fee percentages stay the same across a catalogue, but the fixed listing fee does not: it lands harder on low-priced items. Running the same fee settings across three price points shows how much of the take rate is fixed cost rather than percentage. At a sale of 10, total fees are 3.30 and the take rate is 33.00%. At 50 it is 25.00%. At 200 it is 23.50%.

The whole of that spread is the listing fee. At a sale of 10 the fixed 1 accounts for 10 percentage points of the take rate; at 50 it is 2 points; at 200 it is half a point. The percentage components contribute a flat 23% at every price. That is why bundling low-value items into a single order moves the take rate on cheap goods and barely registers on expensive ones.