What you actually keep, after every marketplace fee.
Small, fast calculators for marketplace fees — no account, no email, no cookie wall. Every number shows the date it was checked and links to the official source, including the numbers we have not been able to check yet.
Amazon
Fulfilment by Amazon, in the order we are building them.
- Amazon profit calculator Referral, fulfillment, the 3.5% fuel surcharge, storage, inbound placement, low-inventory, aged inventory and returns — each line dated and linked to the page it came from.
- Inbound placement fee calculator The fee for sending stock to fewer fulfilment centres, by size and weight. Published as a range, so the page shows both ends and never an invented midpoint.
- Storage fee calculator Your dimensions in cubic feet, priced at both the January–September rate and the October–December peak rate, with the utilisation surcharge and the date it ends.
- Low-inventory-level fee calculator The flat per-unit charge applied when stock runs below 28 days of supply, by size, weight band and how far below the line you fell.
- Aged inventory surcharge calculator The per-cubic-foot charge from 181 days in storage, with the steep steps, the two comparison bands and the five excluded categories named.
- Returns processing fee calculator The per-return fee by weight for general merchandise and apparel, the step table above 48 oz, and the unit exemption with the date it ends.
- Individual vs Professional selling plan The item count where the $39.99 monthly fee beats $0.99 an item — 41 a month, 485 a year — with the annual view for sellers whose months are uneven.
- Apparel fee calculator The 5%, 10% and 17% clothing referral steps (charged on the whole price), the separate apparel fulfilment table, and every price where one cent more pays you less.
- Removal, disposal and liquidation fees The two per-unit removal rate cards, the 2026 cut to the lightest band, the 15% liquidation fee with its handling charge, and why disposal costs exactly what a return costs.
- Restocking calculator Units to send from your own sales rate, lead time and safety days, the day your stock runs out, and what the shipment costs in storage every month at both seasons' published rates.
- Amazon UK fees planned
TikTok Shop
Referral fees by category, plus the refund administration fee.
Etsy
Listing, transaction and payment processing fees.
- Etsy fee calculator planned
2 more calculators are planned across 3 marketplaces, listed in the order we intend to build them. They are named, not linked: nothing here is promised a date, and a dead link would cost more trust than it buys traffic. eBay, Walmart Marketplace, Shopify, Print on demand are on the list after those.
Where the data stands
Every source, dated. These are the documents behind every figure on the site, and the date each one was read. Between and ; each calculator prints its own date and its own link.
- Amazon referral fees and selling plan prices — read from a public page.
- Amazon fulfilment, storage, inbound placement, aged and low inventory, returns — read from a Seller Central login.
- Amazon removal, disposal and liquidation order fees — read from a Seller Central login. The article is headed 2026 and its newest dated rule is 2026-01-15. Amazon's later "2027 US FBA fulfillment fee changes" article, also read here, carries no removal table.
- TikTok Shop referral fees by category and the refund administration fee — read from a public page. The category table is headed 2024 and its newest dated rule is 2025-05-15.
Two marketplaces do not behave the same way, and the site says which is which. Amazon's referral table is public and its FBA tables need a Seller Central login; TikTok Shop's rate table is public but its own page is headed 2024, which is why that line above says so rather than calling it current.
Dated, not "current": Amazon publishes fulfilment rates in windows, so the calculator prices whichever window covers the day you load it and names it above the result. There are 3 windows loaded; the last one ends 2027-10-14, and past that date the calculator refuses to guess.
Why bother, when there are a dozen fee calculators?
Because most of them model the two-fee world that ended around 2024. A referral fee and a fulfillment fee, no inbound placement, no low-inventory-level, no aged inventory surcharge — and no date on the page telling you which vintage of the fee schedule you are looking at. A number with no date is a guess with a font.
What this site does differently is narrow: show the fee table, show when it was checked, link to the source, and refuse to print a figure that hasn't been read off that source. It is a small edge. It is the only one available.