Mercari charges a flat 10% on the item price and on buyer-paid shipping. The 2.9% + $0.50 payment fee was eliminated in January 2025 — old calculators still charge it to you on paper.
Mercari's seller fee is a flat 10%, and the only complexity is what it applies to. The fee is charged on the item price, and separately on any shipping the buyer pays you. If a buyer pays $50 for the item plus $6 shipping, Mercari's fee is 10% of $50 = $5.00 plus 10% of $6 = $0.60, for a total of $5.60 on $56 collected. Your payout is $50.40. There are no listing fees, no monthly costs, and no category-based rates.
This separation matters because most sellers model the fee as "10% of what the buyer paid" — which happens to give the same answer here, but breaks down the moment shipping structure changes. When you offer free shipping, there is no buyer-paid shipping to tax; the fee is 10% of the item price only, and the postage comes out of your pocket afterwards. The two structures are not symmetric, and the difference is real money.
| Structure | Buyer pays | Fee (10%) | Label cost | Seller nets |
|---|---|---|---|---|
| $50 item, buyer pays $6 shipping | $56.00 | $5.60 | — | $50.40 |
| $56 item, free shipping (label $6) | $56.00 | $5.60 | $6.00 | $44.40 |
The table above shows the same $56 buyer checkout producing two payouts $6.00 apart. In the buyer-paid structure, the shipping money passes through you and loses 10% ($0.60) on the way; the buyer's $6 covers the label in full. In the free-shipping structure, you buy the label yourself and the full $6 is your cost — Mercari does not tax it, but nothing offsets it either. Free shipping is a conversion tactic, not a fee optimization, and on Mercari its exact price is one label per order.
Below the 10% comparison sits a second-order effect: items under about $60 are where the choice matters most, because $6 of postage is a meaningful share of the sale. On a $20 item with $6 shipping, buyer-paid nets you $23.40 while a $26 free-shipping listing nets $23.40 − $6 = $17.40. The Metriova Mercari calculator models both structures side by side because the answer flips listing strategy for most of the catalog.
Until January 6, 2025, Mercari added a payment processing fee of 2.9% + $0.50 on top of the 10% selling fee. It no longer exists — but a large share of fee calculators and blog posts still add it, because the old schedule is baked into their code. The error is not cosmetic. On a $100 item with $8 buyer-paid shipping, the real fee is 10% of $108 = $10.80. A calculator still charging the processing fee reports $10.80 + (2.9% of $108 + $0.50) = $14.43 — overstating your cost by $3.63 on every identical sale.
Scale that ghost fee across a year of selling: 500 sales at that price point means $1,815 of costs you would be pricing against that you never actually pay. If you price listings to "cover the fees" using an outdated number, you are overpricing relative to competitors on the same platform. Every fee figure in this article reflects the post-January 2025 schedule, and the Metriova Mercari fee calculator implements it — if any tool shows you a "payment processing" line for Mercari today, it is wrong.
Mercari computes the 10% on the price actually paid after any promotion. If you list at $50, run a 20%-off sale, and the item sells for $40, the fee is $4.00 — not 10% of the list price. This is seller-friendly in one direction (discounts shrink the fee proportionally) and dangerous in another: a stacked discount on a thin-margin item can push the fee-adjusted net below your floor before you notice. Coupons, Offer to Likers, and smart-pricing adjustments all flow through the same rule — the fee follows the money, wherever it lands.
The practical habit is to model your worst realistic outcome, not your list price. If your promotion calendar usually lands items at 15% off, run the calculator at the discounted price before you commit to the campaign. A listing that is healthy at $50 and marginal at $42.50 needs a different floor than one whose demand is promotion-insensitive.
The flat 10% makes Mercari the easiest marketplace to sanity-check others against. When a platform's effective rate on your item exceeds Mercari's plus the shipping structure you actually use, the burden of proof is on the more expensive platform — and the Metriova comparison page runs that check across Etsy, eBay, and Amazon FBA on one screen.
Mercari Fee Calculator — 10% Flat Fee & Real Net Payout
Put the numbers from this guide to work. The calculation runs entirely in your browser — nothing is sent to a server.
Mercari's flat 10% is the cleanest baseline in e-commerce — run the same item through the comparison engine's three percentage-fee marketplaces and see which payout wins.
Rates verified 2026-10-09 · Sourced from official seller fee schedules