Washington Files Lawsuit Against Kalshi Over Gambling Allegations

March 30, 2026
News
...

Washington Challenges Kalshi in New Gambling Lawsuit

Washington state has taken legal action against Kalshi, a prediction market platform, accusing it of facilitating illegal gambling activities under state law. This lawsuit is the latest in a series of challenges faced by the company across the United States.

Legal Claims Center on Gambling Definition

The lawsuit was filed on March 27 in King County Superior Court by Attorney General Nicholas W. Brown. It asserts that Kalshi’s business model violates some of the country’s most stringent gambling regulations. At the heart of the case is Washington’s definition of gambling, which involves risking something valuable on the outcome of uncertain events or contests, with expectations of winning a monetary reward.

The complaint highlights that Kalshi’s markets, which include sports, political, and cultural events, meet this gambling definition. According to the lawsuit, each bet involves risking money, depends partly on chance, and offers a payout to winners.

Washington permits sports betting exclusively at tribal casinos, making its regulations particularly strict compared to other states.

Efforts to Recover Residents’ Lost Funds

Kalshi has previously faced legal challenges in other states such as Massachusetts, Nevada, Michigan, and Arizona, with suits ranging from civil complaints to criminal charges. Nevada is notable for having compelled Kalshi to suspend some offerings, like sports-related contracts, through a temporary restraining order.

In Washington, the complaint not only seeks to stop Kalshi’s operations but also requests recovery of money lost by residents who used the platform. Citing the state’s Recovery of Money Lost at Gambling Act, officials claim the right to retrieve these funds on behalf of users, although the amount has not been disclosed.

Legal Ambiguities and Further Allegations

Kalshi’s business model might rely on a legal gray area in state law, which exempts legitimate business contracts involving commodities or securities. While the law does not explicitly address contracts based on events, its language could allow for different interpretations, which will likely be a significant point in the court proceedings.

The lawsuit also accuses Kalshi of profiting through trade fees, functioning similarly to a bookmaker. It alleges that the company unlawfully transmits gambling information online and keeps prohibited records and devices connected to its operations.

Looking forward, Kalshi may attempt to transfer the lawsuit to federal court to argue that federal law governs its activities. However, similar efforts in other states have not been successful to date.