What are prediction market fees?
Prediction market platforms charge fees on trades. These vary by platform — some charge per-contract fees based on the trade price, while others take a percentage of profits. Understanding fee structures helps you maximize returns.
Platform comparison
Kalshi charges a fee proportional to price variance (higher at 50¢, lower near 0¢/99¢). Taker fees are 7%, maker fees are 1.75%. PredictIt takes a flat 10% of profit. Polymarket and ProphetX currently charge no trading fees.
How to use
Enter a contract price (0 to 1) and the table instantly shows the fee each platform would charge. The lowest fee is highlighted in green. Use this to decide which platform offers the best deal for your trade.
