Mercari Fee Calculator
Flat 10% selling fee on the completed item price and buyer-paid shipping for US listings. No separate payment processing fee on new listings.
Rates checked October 3, 2026. Source: Mercari US seller fees.
Worked example
Item price: $50.00 · Buyer shipping: $0
Fee: 10% = $5.00 · Payout: $45.00
Are my numbers sent to a server?
No. The math runs in the browser and nothing typed is uploaded or stored.