TLDR Polymarket is expanding trading fees to most market categories including politics, finance, culture, weather, and tech starting March 30 Crypto markets will carry the highest fees, peaking at 1.8% at 50% probability, while sports markets remain the lowest at 0.75% A new referral program offers 30% of fees from direct referrals and 10% from second-level referrals for 180 days Only users who have traded at least $10,000 in volume qualify for the referral program New market integrity rules target insider trading, illegal tips, and manipulation by individuals who can influence event outcomes
Polymarket, the prediction market platform, is set to roll out trading fees across most of its market categories beginning March 30. The expansion comes alongside a new referral program and updated market integrity rules.
The platform currently charges trading fees only on crypto and sports event contracts. Under the new structure, fees will extend to politics, finance, economics, culture, weather, tech, and other categories.
Polymarket uses a probability-based fee model rather than a flat commission. Fees are highest when an event outcome sits around 50% probability and decrease as the outcome becomes more certain in either direction.
Fee Structures Vary by Category
Crypto markets will see the highest effective fees under the new system. The peak rate at 50% probability will rise to 1.8%, up from the previous 1.56%.
Sports markets will remain the cheapest category for traders. Peak effective fees there will increase to 0.75% at 50% probability, up from 0.44%.
Most other categories will have peak effective rates falling between 1% and 1.56%. As a practical example, a $50 trade on a sports event priced at 50% probability would go from costing $0.22 in fees to $0.38.
Maker orders, which add liquidity to the order book, will still be eligible for rebates.