A coalition that includes prediction market platform Kalshi has filed a lawsuit seeking to block Kentucky's newly implemented 14.25% tax on prediction markets, according to court filings.

The legal challenge comes as prediction markets have experienced significant growth in recent years, with platforms allowing users to bet on various outcomes ranging from political elections to economic indicators. Kentucky's tax represents one of the first major state-level attempts to impose substantial levies on this emerging sector.

The lawsuit argues that the tax rate is excessive and could harm the developing prediction market industry in the state. Kalshi, which operates a regulated prediction market platform, is among the lead plaintiffs in the case.

Prediction markets have faced ongoing regulatory scrutiny from federal agencies as well. The Commodity Futures Trading Commission and other regulators have debated how to classify various types of prediction market contracts, particularly around whether certain betting products should be treated as swaps under financial regulations.

The Kentucky case highlights the broader regulatory uncertainty facing prediction market operators as they navigate a patchwork of state and federal oversight. The outcome could influence how other states approach taxation of prediction market activities and set precedents for the industry's regulatory framework.