Illinois delays Kalshi tax enforcement during injunction fight
Kalshi filed a federal lawsuit against Illinois to block a new state tax of 1.75% to 3.5% on prediction market trades that the state classified as sports wagering. The suit was filed Monday, June 29, 2026. Illinois has agreed to delay enforcement of the tax while the litigation proceeds. Kalshi's challenge tests whether state gambling laws can override federal commodity-market oversight of its CFTC-regulated event contracts.
Kalshi filed its suit Monday, June 29, 2026 to block the Illinois tax before it takes effect.
The stay gives Kalshi a temporary reprieve from a tax that would make its pricing immediately uncompetitive against offshore platforms that pay no state levy. The broader risk is that Illinois's tax-and-license framework becomes a template: a loss here invites other states to replicate the structure, forcing Kalshi and Polymarket into parallel state-by-state fights over whether CFTC registration shields them from local gambling oversight. The platforms that survive this patchwork will be those that can afford legal teams in every jurisdiction that files. Michigan's recent injunction against Kalshi sports bets shows the market-access stakes are real, not theoretical.
Illinois becomes the fourth state whose prediction-market crackdown is now being fought in federal court by Kalshi and Polymarket, after parallel CFTC preemption suits against Minnesota, Kentucky, and New Mexico.