Washington State Attorney General Nick Brown filed a civil lawsuit against Kalshi in King County Superior Court. The suit accuses the company of operating an illegal online gambling platform disguised as a prediction market, in violation of Washington’s Gambling Act, Consumer Protection Act, and related laws allowing recovery of losses from illegal gambling.
What the Lawsuit Alleges
Kalshi allows users including Washington residents to place bets on the outcomes of real-world events, such as: Sports games and leagues (e.g., NFL), Elections and political races, Wars or geopolitical events like potential outcomes in the Iran conflict, Public health data and Court proceedings or other news events.
The state argues that these event contracts meet the legal definition of gambling under Washington law; consideration, chance, and prize, regardless of the “prediction market” branding. The complaint highlights Kalshi’s own marketing and ads—such as one suggesting users can bet on the NFL even though we live in Washington—as evidence that the company knowingly circumvents state restrictions.
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Washington has relatively strict anti-gambling laws with exceptions mainly for tribal casinos and limited other forms, and sports betting is not broadly legalized for online operators in the state. A permanent injunction to stop Kalshi from operating in or targeting Washington residents. Restitution for money lost by Washington users on the platform.
Civil penalties for each alleged violation of the Gambling Act and Consumer Protection Act. The suit is framed as a consumer protection matter, aiming to block access and recover losses rather than pursue criminal charges. Kalshi has removed the case from state court to the U.S. District Court for the Western District of Washington.
It argues that the dispute involves federal questions, particularly under the Commodity Exchange Act which regulates certain derivatives and event contracts. The company has defended its platform as a legitimate prediction market for event contracts, not traditional gambling. This is part of a broader wave of state-level scrutiny: Washington joins states like Arizona which filed criminal charges and Nevada’s temporary shutdown in challenging Kalshi’s operations.
Outcomes could hinge on whether courts view Kalshi’s contracts as regulated commodities and futures or as prohibited gambling. Prediction markets like Kalshi have grown popular for allowing bets on elections, economics, and news, often with lower barriers than traditional sportsbooks. Proponents argue they provide useful information aggregation and hedging tools.
Critics, including regulators in strict states, see them as unregulated gambling that risks addiction, money laundering, or manipulation—especially when accessible to residents in states without legalized online betting. The case is ongoing; federal court proceedings will likely address jurisdiction and the core classification of Kalshi’s products.
A win for Washington could encourage other strict anti-gambling states to act, fragmenting the U.S. market and forcing geo-blocking or product changes. A win for Kalshi could strengthen the argument that properly structured event contracts are federally regulated commodities, not state-prohibited gambling.
Proponents argue these platforms aggregate useful crowd wisdom on elections, economics, and events. Reduced access in states like Washington could slightly diminish that though national liquidity remains. Critics worry about unregulated risks like manipulation or addiction.
The case tests the boundary between prediction markets often CFTC-approved for certain contracts and illegal online betting and sports wagering. Outcomes in Washington, combined with actions in Arizona, Nevada and federal suits elsewhere, may influence how platforms design contracts and how aggressively states enforce their laws.