Polymarket fee calculator
Pick the market category, enter the share price and number of shares. The calculator applies Polymarket's formula: shares × feeRate × price × (1 − price). Maker orders pay nothing.
How the fee works
Fees peak in dollars at a 50¢ price and fall toward zero at the extremes. Only takers pay; resting limit orders are free. Full details and the category table are on Polymarket fees.
Ready to try it? Check it is available where you live, then open Polymarket.
Open PolymarketFrequently asked questions
Is the fee charged on winnings?
No. It is charged when a taker order fills, not at settlement.
Why is my actual fee slightly different?
Fees are rounded to 5 decimal places, some older markets keep the fee schedule they launched with, and active traders get 3–50% back through taker rebate tiers.