Polymarket Expands Fees and Tightens Trading Rules

Polymarket is overhauling its pricing model and compliance framework in a sweeping set of changes taking effect March 30, extending trading fees across nearly every market category on the platform while introducing new restrictions designed to curb manipulation and align operations with conventional financial market standards.

Until now, the prediction market platform had confined trading fees primarily to crypto and sports contracts. 

The revised structure extends charges into politics, finance, economics, culture, weather, and technology – capturing the full breadth of activity on the platform under a unified monetisation framework. 

The expansion represents a fundamental shift in how Polymarket generates revenue, moving from a narrowly targeted fee model to one that treats the platform’s entire market ecosystem as a commercial asset.

Polymarket does not charge flat commissions. Instead, it applies a probability-based pricing model in which fees peak when implied odds sit near 50% – the point of maximum uncertainty – and taper toward zero as outcomes become more deterministic. The approach ties transaction costs directly to market conditions rather than applying a uniform rate across trades.

A Tiered Cost Structure Takes Shape

Crypto contracts will remain the platform’s most expensive segment and are getting pricier: peak fees at the midpoint probability will rise from 1.56% to 1.8%. 

Sports markets, though the lowest-cost category, are also seeing increases – from 0.44% to 0.75%. A $50 sports market wager at even odds will now cost $0.38 in fees, up from $0.22. 

Newly added categories are expected to carry peak charges in the 1% to 1.56% range, positioning them between sports and crypto in a tiered cost structure that broadly reflects perceived risk and demand by category.

Alongside the fee expansion, Polymarket is launching a referral program aimed explicitly at high-volume traders. 

Access is gated at a $10,000 cumulative trading threshold, limiting participation to the platform’s more active users. Qualifying participants earn 30% of fees generated by direct referrals and 10% from second-tier referrals, with rewards distributed daily at midnight UTC for the first 180 days following a referral. 

The company has set no cap on total earnings, suggesting the program is designed to scale aggressively with user activity rather than function as a controlled incentive with a defined ceiling.

Compliance Infrastructure Gets a Formal Upgrade

The integrity revisions span both Polymarket’s international platform and its U.S. operations, which fall under Commodity Futures Trading Commission oversight. 

The updated rules explicitly prohibit trading on stolen or confidential information and bar participation by individuals who could directly influence the outcome of an event underlying a contract – a provision targeting the kind of insider-adjacent activity that has drawn scrutiny to prediction markets in the past. 

The company has also launched dedicated Market Integrity pages through which users can flag suspicious activity, formalising a surveillance mechanism that is standard at regulated trading venues but had previously been absent from Polymarket’s operational infrastructure.

The timing is not incidental. Prediction markets have drawn growing attention from regulators and policymakers, particularly platforms offering exposure to political and real-world outcomes. 

That scrutiny accelerated notably during the 2024 U.S. election cycle, when Polymarket’s political contracts attracted mainstream attention and, with it, questions about market integrity and the potential for manipulation.

Polymarket’s simultaneous moves on pricing discipline, revenue capture, and compliance infrastructure reflect a deliberate effort to operate more like a conventional exchange as that oversight environment continues to develop. 

According to industry analysts, whether tighter rules and a broader fee base will satisfy regulators or attract additional scrutiny by drawing greater attention to the platform’s scale remains an open question as the March 30 changes take hold.