Kentucky has targeted prediction market operators with a new excise tax, drawing a legal challenge from an industry coalition that includes Kalshi, Crypto.com and Polymarket. The dispute adds another state-level front to the broader fight over whether event-contract platforms should be treated mainly as federally regulated markets or as gambling businesses subject to state oversight.
Kentucky has targeted prediction market operators with a new excise tax, drawing a legal challenge from an industry coalition that includes Kalshi, Crypto.com and Polymarket. The dispute adds another state-level front to the broader fight over whether event-contract platforms should be treated mainly as federally regulated markets or as gambling businesses subject to state oversight.
Kentucky has moved against prediction market operators with a 14.25% excise tax on their transaction fees, prompting a lawsuit from the Coalition for Fair Markets, whose members include Kalshi, Crypto.com and Polymarket. The challenge argues that the tax is discriminatory, unconstitutional and preempted by federal law.
Kentucky has moved against prediction market operators with a 14.25% excise tax on their transaction fees, prompting a lawsuit from the Coalition for Fair Markets, whose members include Kalshi, Crypto.com and Polymarket. The challenge argues that the tax is discriminatory, unconstitutional and preempted by federal law.
The case matters because prediction markets sit at the boundary of financial regulation, gambling law and crypto-linked trading infrastructure. A state tax aimed specifically at these platforms could raise operating costs and complicate U.S. expansion plans for companies trying to present event contracts as regulated financial products rather than conventional wagering.
Prediction markets allow users to trade contracts tied to real-world outcomes, including elections, economic data and other public events. Supporters argue they can function as information markets, while state officials have increasingly scrutinized whether the products resemble gambling and should fall under local gaming rules.
Kentucky’s position may also put the state in tension with the Trump administration’s regulatory direction. The Commodity Futures Trading Commission under Trump-appointed leadership has shown support for federal oversight of prediction markets, while several states have pursued their own enforcement or licensing theories.
The lawsuit also points to Kentucky’s treatment of horse-track wagers, which are taxed at a lower 9.75% rate, as part of its argument that the prediction market levy favors an incumbent local industry. Kentucky officials have signaled they intend to defend the measure, keeping the state at the center of a wider fight over who gets to regulate event-contract trading in the U.S.
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