Mercari's current U.S. structure charges sellers 10% of the item price plus buyer-paid shipping. Its May 2026 help article says there is no additional payment processing fee under this structure.
That simplicity helps, but the 10% is still only one cost. Inventory, seller-paid shipping, packaging, label adjustments, returns, and transfer choices determine what a sale really earns.
The current calculation
Add item price and shipping paid by the buyer, then multiply by 10%. Buyer-paid tax is not part of the selling-fee basis in the official formula. Subtract the resulting fee from the money credited to the seller.
- Selling fee: 10%
- Basis: item price plus buyer-paid shipping
- Separate payment processing: not modeled under current policy
- Actual fulfillment costs reduce profit separately
Offers need a profit floor
Mercari's offer flow makes it easy to focus on revenue instead of margin. Calculate the lowest acceptable sale price for every item before messages arrive. Include the 10% fee and your full landed cost.
Free shipping is not free
When the seller absorbs shipping, the label or postage cost is a direct expense. A buyer-paid shipping charge increases the fee base, but a seller-paid label can reduce profit even more. Model the actual arrangement.
Reconcile the completed transaction
Mercari has changed fee structures more than once. Review the live fee page and the transaction statement, especially for listings created or updated around a policy transition.
Sources
Frequently asked questions
How much does Mercari take from a U.S. seller?
Mercari's current U.S. help page lists a 10% fee on item price plus buyer-paid shipping.
Does Mercari charge a payment processing fee?
The current policy says no additional payment processing fee under this seller-fee structure.
Does Mercari charge its seller fee on sales tax?
The official current formula describes the base as item price plus buyer-paid shipping, not buyer tax.