Last updated: April 2026
FeePilot is a free marketplace fee calculator that helps online sellers compare fees across 15 platforms instantly. Enter your item price, shipping, and cost — and see your net profit on every major marketplace side by side. No account required, no data stored, no affiliate games.
Marketplace seller fees are confusing. Each platform has different rates, different rules, and hidden costs that can eat into your margins without you realizing it.
eBay, Mercari, Poshmark, Etsy, Depop, StockX, GOAT, Grailed, Whatnot, Kidizen, Vestiaire Collective, Facebook Marketplace, OfferUp, Vinted, and PayPal Goods & Services.
FeePilot is built for anyone who sells on online marketplaces — resellers, thrift flippers, sneaker sellers, vintage clothing dealers, handmade creators, and small business owners. Whether you're deciding which platform to list on, pricing an item to hit a profit target, or comparing fees before committing to a marketplace, FeePilot gives you the numbers you need in seconds.
Enter your item price, shipping costs, and what you paid for the item. FeePilot calculates every fee component — marketplace commission, payment processing, listing fees, and any platform-specific charges. The comparison table shows your net profit and margin across all supported platforms so you can choose the best one for each sale.
All calculations run entirely in your browser. Nothing is sent to a server. Your pricing data stays on your device.
FeePilot runs entirely in your browser. No account required, no data stored on our servers, no tracking cookies. Your pricing data stays on your device. We use Plausible Analytics for anonymous page view counts only — no personal data is collected.
Yes. The core calculator is completely free — compare fees across all 15 platforms, export CSV reports, and share results via link at no cost. FeePilot Pro ($5/month) adds the reverse calculator for target take-home pricing.
We verify fee data regularly against each platform's official fee pages. Every individual platform guide includes a "Last updated" date. Major fee changes (like Mercari removing processing fees in January 2026) are updated within days.
No. FeePilot has no affiliate relationships with any marketplace. We do not earn referral commissions, accept sponsored rankings, or receive payments from any platform. Fee calculations are based purely on published fee structures.
A premium feature ($5/month) with a reverse calculator. Instead of calculating fees from a sale price, it works backwards — enter your target take-home amount and it tells you what price to list at on each platform to hit that goal.
Read detailed fee breakdowns for every platform, with real numbers, worked examples, and tips to reduce costs:
Built with Next.js, React 19, and TypeScript. Deployed on Vercel. Open source documentation available on GitHub.
Disclaimer: FeePilot is not affiliated with any of the marketplaces or payment processors listed on this site. All fee information is based on publicly available data. Fees change periodically — always consult each platform's official documentation for the latest rates.