Poshmark seller fee calculator. Calculate your total Poshmark seller fees, profit & margin. Poshmark Fee Calculator Poshmark Seller Location United StatesCanada Selling Price * $ Cost * $ Selling Price * C$ Cost * C$ Calculate Frequently asked questions. What are the Poshmark fees? Poshmark is an online marketplace for buying and selling fashion and accessories. Poshmark charges a transaction fee to sellers for each successful transaction. There are no listing fees, and the transaction fee incorporates all payment processing fees. What is the Poshmark transaction fee? Poshmark charges a flat rate of 20% of the total selling price as a fee to the seller for each successful sale, if the selling price is greater or equal than $15. Below $15, Poshmark charges the seller a fixed fee of $2.95. In Canada, Poshmark also charges a flat rate of 20%, but only if the selling price is greater or equal than C$20. Below C$20, Poshmark charges the seller a fixed fee of C$3.95.