The Best Reseller Platform Fee Calculator eBay, Etsy, Poshmark, Depop, Facebook & Mercari Compared
Most platform fee calculators tell you what eBay charges. This one shows what you actually pocket — and then lines up all 6 major reseller platforms side by side so you can see which one pays out the most for that specific sale. Fee logic for each platform is explained in ShowMath.
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Compare selling fees across eBay, Etsy, Poshmark, Depop, Facebook Marketplace, and Mercari. Enter sale price, shipping, and item cost — see net proceeds and profit on all 6 platforms side by side with the winner highlighted.
- ✗Single-platform calculators don't show opportunity cost. Knowing eBay charges 13.25% is useful, but knowing that Facebook Marketplace charges only 5% for the same item — meaning you net $4 more — is actionable. Most calculators only cover one platform.
- ✗Shipping is excluded from fee calculations. Most platforms charge fees on the sale price plus shipping received. Entering only the sale price understates the true fee for every platform that charges on gross transaction value.
- ✗COGS is never factored in. Knowing your net proceeds is half the picture. Knowing your actual profit after what you paid for the item is what matters for deciding whether to sell at all.
- ✗Fee formulas are opaque. Sellers should know why they're paying what they're paying — Poshmark's $2.95 flat vs 20% logic, Etsy's layered fees, eBay's per-transaction fee. ShowMath breaks each one down.
- ✗No head-to-head comparison. For each sale, resellers need to know: given this item, this price, and this shipping charge, which platform nets me the most money?
eBay (13.25% + $0.30), Etsy (6.5% + 3% + $0.25 + $0.20 listing), Poshmark ($2.95 under $15, 20% over), Depop (10% + 3% payment), Facebook Marketplace (5%, min $0.40), Mercari (10% + 3.5%). Enter your sale and see all six ranked by net proceeds.
Enter what the buyer paid for shipping separately. Most platforms charge fees on the total transaction (sale + shipping), not just the item price. The calculator applies each platform's fee logic correctly to the full transaction amount.
Enter your item cost to see profit (not just proceeds) on each platform. This shows which platform actually leaves you with the most money after the cost of the item — the number that matters for reselling profitability.
Select any platform and open ShowMath to see every fee component broken out with the formula and substituted values. Poshmark's flat vs percentage logic, Etsy's layered structure, eBay's per-transaction fee — all explained.
| Feature | Typical Calculator | Reise Tools |
|---|---|---|
| All 6 major platforms (eBay, Etsy, Poshmark, Depop, FB, Mercari) | ||
| Fee on shipping included (not just sale price) | ||
| COGS entry for true profit (not just proceeds) | ||
| Side-by-side comparison ranked by net proceeds | ||
| Poshmark flat vs percentage logic ($15 threshold) | ||
| ShowMath with formula breakdown per platform | ||
| Best platform winner highlighted automatically | ||
| Free with no account required |
Every Reise calculator has a ShowMath panel — expand it and you see the exact formula with your actual numbers substituted in. Not a result. Not a black box. The full derivation, step by step.
Platform fees are the first place resellers lose money without noticing. A 20% Poshmark fee vs a 13.25% eBay fee on a $50 sale is a $3.38 difference — per item. At scale, choosing the right platform for each category of item can add thousands to annual profit. The comparison table makes this decision automatic.
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