What happened in the Kentucky prediction market tax lawsuit?

Kalshi, Crypto.com, Polymarket and other prediction market platforms sued Kentucky in state court to block a new 14.25% tax on transaction fees. The platforms argue the levy unfairly targets event-contract markets. The case could shape how US states tax regulated prediction market activity.

Why are Kalshi, Crypto.com and Polymarket suing Kentucky?

Kalshi, Crypto.com and Polymarket claim Kentucky’s 14.25% tax is discriminatory, unconstitutional and may conflict with federal law. The platforms argue the tax makes regulated prediction markets less competitive. They also say it could push traders towards less-regulated offshore venues.

What does Kentucky’s 14.25% prediction market tax apply to?

Kentucky’s 14.25% tax applies to transaction fees collected by prediction market platforms. These platforms let users trade contracts linked to real-world events such as economic data, elections, policy decisions and sports outcomes. The tax was approved by Kentucky lawmakers in April.

Why does the Kentucky prediction market tax matter to traders?

The Kentucky prediction market tax matters because higher platform costs could affect pricing, liquidity and access for traders. If regulated platforms face higher taxes, users may see worse trading conditions. The lawsuit also raises questions about how states should treat event-contract markets.

How does Kentucky’s prediction market tax compare with horse racing taxes?

The lawsuit says Kentucky’s prediction market platforms face a 14.25% tax on fees. The state’s local horse racing industry faces a lower rate of about 9.75%. The plaintiffs argue this difference supports their claim that the new tax unfairly targets prediction markets.

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Prediction markets sue Kentucky over 14.25% tax

Written by Isaac FrancisPublished Jun 14, 2026, 2:20 AM

Kalshi, Crypto.com, Polymarket and other prediction market platforms have jointly filed a lawsuit in Kentucky state court to block a new 14.25% tax on transaction fees.

The legal challenge was filed on Friday after Kentucky lawmakers approved the levy in April as part of the state’s latest tax measures.

The tax applies to fees collected by prediction market platforms, which allow users to trade contracts linked to real-world events.

These markets can cover economic data, election outcomes, policy decisions, sports results and other events that traders believe can be priced through contracts.

The plaintiffs argue that Kentucky’s 14.25% rate unfairly targets prediction markets and places them at a disadvantage against other local industries.

The lawsuit points out that Kentucky’s local horse racing industry faces a lower tax rate of about 9.75%, despite also operating within a betting-linked environment.

The platforms claim the new tax is discriminatory, unconstitutional and may conflict with federal laws governing event derivatives and regulated trading activity.

The companies also warn that the steep levy could raise compliance costs for platforms already trying to operate within regulated US markets.

Higher costs could make legal prediction markets less competitive and reduce the appeal of regulated platforms for traders and market makers.

The plaintiffs said the tax could push more users towards offshore platforms that operate with fewer safeguards and weaker consumer protections.

Kalshi, one of the main companies involved in the lawsuit, argued that the state-level levy could damage market competitiveness and redirect activity into unregulated black market venues.

Kentucky Attorney General Russell Coleman said his office would strongly defend the tax and argued that the state was prepared to handle any legal challenges connected to the law.

The case adds another layer to the growing dispute between US prediction market operators and state-level tax and regulatory systems.

Prediction market companies have expanded quickly as traders seek new ways to take positions on elections, economic releases and other major public events.

Regulators and state governments are now weighing how these platforms should fit within existing rules for gambling, derivatives, financial markets and consumer protection.

The Kentucky lawsuit could become an important test case for how far individual states can go in taxing prediction market activity.

A ruling against the tax may strengthen the industry’s argument that regulated prediction markets should not face unusually high state-level costs.

A ruling in Kentucky’s favour could encourage other states to impose similar fees on prediction market platforms.

For traders, the outcome may affect platform pricing, liquidity and access to regulated event-contract markets across the US.