Polymarket charges a small fee on certain markets. We use these fees to reward users who provide liquidity to the platform, which helps ensure you get the best prices and a smooth trading experience.
What is always free?
Geopolitical & World Events: Markets in these categories are completely fee-free. Polymarket does not charge fees or profit from trading activity on these markets.
Deposits & Withdrawals: Polymarket does not charge any fees to deposit or withdraw your USDC (though third-party providers like Coinbase or MoonPay may have their own standard network fees).
Markets With Fees
Currently, small fees apply to Crypto and Sports markets.
Starting March 30, 2026, this will expand to include other categories like Finance, Politics, Economics, Culture, Weather, and Tech.
How are fees calculated?
Fees change based on the share price: The fee is highest when a share is priced at 50¢ (a 50% probability). The maximum effective fee rate is 1.80% at 50% probability.
Fees drop at the extremes: As a share's price gets closer to 1¢ or 99¢, the fee gets smaller and smaller.
Fees are rounded to 4 decimal places. The smallest fee charged is 0.0001 USDC. Anything smaller rounds to zero, so very small trades near the extremes may incur no fee at all.