About Seller Fee Desk

Seller Fee Desk is an independent site run by an individual based in the United States. It is published under its own name, Seller Fee Desk, which is the author of every tool and guide, and every one of them shows its arithmetic and its sources so you can check them yourself.

Seller Fee Desk is not run by a tax professional, accountant or attorney, and it does not give tax, legal or financial advice. It shows the arithmetic and reports what the platforms’ own pages and the government sources say, with the sources linked.

You can reach the site at hello@sellerfeedesk.com.

Selling fees changed on almost every major marketplace in 2025 and 2026: new tiers, fees charged on shipping and on sales tax, new minimums and new label programs. Many fee calculators online were never updated, and few of them charge each fee on the part of the sale the platform actually uses. A wrong fee shows up as a wrong price, a wrong choice of where to sell, or a profit that isn’t there.

Seller Fee Desk puts each platform’s current rules in one place, with the source and the date next to every number, so you can see what you keep before you buy, list or ship.

The calculators are free, with no account and nothing to install. They run entirely in your browser: the prices, costs and other numbers you enter are not sent to this site, not stored on it and never put in the page address. When you press a link that carries them to another calculator (“Same $28 on every platform →”), they are passed through your browser’s session storage and deleted as soon as the next page reads them.

Each tool charges every fee on the base the platform itself uses — the item price, the shipping the buyer pays, the sales tax — and lists each rule with a link to the platform’s own page. Where a rule could not be confirmed, the tool says “Not modeled” instead of guessing. The arithmetic is covered by automated tests.

Next to every result you will see “Fee rates as of …, verified …”. The first date is how current the fee data is; the second is the last time the platform’s own pages were read and the numbers checked against them. Fee rules are stored with the dates they take effect, so a tool can already apply a change that a platform has announced for a later date. Confirmed changes are listed in the fee change log, newest first, each with its source.

• Each guide answers one question a seller actually has, such as “What exactly does eBay take from a sale?”
• Facts come from primary sources — the platforms’ own help and fee pages, the IRS, USPS, state revenue departments — and each guide lists them with the date they were read.
• Guides are researched and drafted with AI writing tools. Before a guide is published, a separate review pass checks every factual statement against its cited source and recomputes the worked examples. Guides never claim testing, credentials, selling experience or results that do not exist.
• Every guide shows when it was published and when it was last updated.
• Factual corrections are shown on the page itself, with the date.
• The photos on the site are original images generated for it with an AI image model. They set the scene; they are not pictures of real sellers, parcels or platforms, and every number on the site is in the drawings and the text.

The full process is in the Editorial Policy, and the limits of what the site can tell you are in the Disclaimer.

Seller Fee Desk is paid for by ads and by commissions on some links; links that pay us are marked next to the link. No platform pays for a place in the comparison.

Seller Fee Desk is free to use. It is supported by advertising from Google AdSense and by affiliate links: some links to seller software are affiliate links, marked “(affiliate link; we earn a commission)”, and links to tools on Amazon are marked “(paid link)”. As an Amazon Associate, Seller Fee Desk earns from qualifying purchases. Ads are labeled “Advertisements” and kept separate from the tools and guides; no affiliate link appears inside a tool or its results; and a company that pays a commission is described by the same rules as one that doesn’t. See the Privacy Policy for how advertising uses data and how to opt out.

Seller Fee Desk is independent and is not affiliated with, endorsed by or sponsored by eBay, Poshmark, Mercari, Depop, Etsy, Whatnot, Meta (Facebook Marketplace), Amazon, StockX, GOAT, TikTok (TikTok Shop), Vinted, Grailed, PayPal, Venmo, Cash App, Apple (Apple Cash), the U.S. Postal Service or any other company named on this site. Names are trademarks of their owners and are used only to identify their services.

Spotted a fee that changed, a mistake, a tool that misbehaves or a question a guide doesn’t answer? Use the contact page or email hello@sellerfeedesk.com.