New York has a message for Kalshi: the house doesn’t always win. On July 31, 2026, Attorney General Letitia James and Governor Kathy Hochul filed a lawsuit against KalshiEX LLC in Manhattan state Supreme Court, accusing the prediction market platform of operating an unlicensed gambling business in direct violation of state law.

The state is seeking an injunction to shut down Kalshi’s operations in New York, full restitution for affected users, and fines that could reach three times the company’s illegal profits.

What New York is actually alleging

The core of the complaint is straightforward: Kalshi has been letting people bet on sports outcomes without the licenses or tax obligations that every other sports betting operator in New York has to satisfy.

New York requires mobile sports bettors to be at least 21 years old. Kalshi’s platform, the state alleges, was accessible to users between 18 and 20.

Kalshi launched in 2021 as a federally regulated prediction market, initially focused on event contracts around things like economic data and political outcomes. When the company expanded into sports markets in 2025, it stepped into territory New York considers firmly within its own jurisdiction.

At peak times, roughly 90% of Kalshi’s trading volume was tied to sports betting, according to the lawsuit.

The state also alleges Kalshi never paid the taxes that licensed operators remit to fund public services.

This fight has been building for months

The state’s Gaming Commission issued a cease-and-desist order to Kalshi in October 2025, telling the company to stop offering its sports markets to New York residents.

Kalshi’s response was to sue New York in federal court, arguing that the Commodity Exchange Act preempts state gambling laws. On July 8, 2026, a court denied Kalshi’s request for a preliminary injunction, rejecting the preemption theory as a basis for blocking New York’s enforcement. Three weeks later, New York filed this lawsuit.

Why this matters beyond Kalshi

Coinbase and Gemini have faced similar state-level legal actions tied to alleged regulatory violations.

For Kalshi specifically, the platform has positioned itself as the legitimate, CFTC-regulated alternative to offshore prediction markets. A state court ruling that those federal credentials don’t protect it from state gambling laws would complicate that pitch substantially.

The fines alone could be material. Three times illegal profits is not a symbolic number, and if 90% of Kalshi’s volume at peak was sports-related, the base calculation for those profits could be large.

If New York wins, it establishes that state gambling regulators have meaningful authority over prediction markets, regardless of federal oversight, forcing every platform operating in this space to take state-level compliance seriously.