Washington Man Sues Kalshi for $580,000 Over Alleged Illegal Gambling Losses

A Washington state resident has filed a lawsuit against prediction market Kalshi, seeking over $580,000 for losses incurred on sports contracts he alleges constitute illegal online gambling. Kalshi has moved to dismiss the case, asserting its contracts are federally regulated financial instruments.

What Happened

Scott Bright, a Bellevue resident, initiated a lawsuit in King County Superior Court on September 24, alleging that his activity on Kalshi’s platform, which involved betting on professional baseball and tennis, amounted to illegal online gambling under Washington state law. Bright reportedly transferred $315,353.94 to Kalshi between June 17 and August 14, 2026, across 253 separate debits from his checking account, ultimately incurring a net loss of $308,781.62, according to Ibtimes.com.au.

Bright’s complaint asserts that Washington state has prohibited online gambling since 2006 and that state law allows individuals to recover losses from illegal gambling operators. The lawsuit also claims that Bright placed these contracts at a time when the Washington Attorney General had already sued Kalshi over similar allegations. Kalshi, in turn, has filed a motion to dismiss the case, arguing that Bright engaged in trading federally regulated event contracts under the Commodity Exchange Act, overseen by the Commodity Futures Trading Commission, suggesting federal jurisdiction over such matters (Ibtimes.com.au).

Key Details

• Scott Bright is seeking $580,544.98 from Kalshi, an amount nearly double his net losses, based on a 1950 Washington Supreme Court ruling regarding loss calculation (Ibtimes.com.au).
• Bright’s complaint alleges that Kalshi’s platform cycled his deposits through more than $14.3 million in transactions and collected $84,062.71 in trading fees, plus $5,589.05 in funding fees, totaling $89,651.76 (Ibtimes.com.au).
• Kalshi describes itself as a “neutral exchange platform” earning revenue from transaction fees, asserting that Bright’s losses went to other traders, not to the company itself (Ibtimes.com.au).
• The 9th U.S. Circuit Court of Appeals ruled in August that Nevada could regulate Kalshi under gambling laws, a finding quoted in Bright’s lawsuit (Ibtimes.com.au).

Why It Matters

This lawsuit represents one of the initial instances where an individual customer, rather than a state government, is leveraging gambling laws to compel a prediction market to repay losses. The outcome could establish a precedent for how prediction markets are regulated and litigated at the state level, particularly concerning their classification as gambling or financial instruments. The case also runs parallel to a broader legal action by the Washington Attorney General against Kalshi, which also seeks to recover money lost by residents (Ibtimes.com.au).

The legal dispute extends beyond Washington, with New Jersey having asked the U.S. Supreme Court to address whether states can regulate Kalshi under their respective gambling laws. Kalshi has requested Bright’s case be paused pending a potential Supreme Court decision, arguing that such a ruling could resolve or simplify all claims. An August injunction in King County ordered Kalshi to cease offering contracts related to sports, elections, and other categories in Washington, though Bright’s betting occurred prior to this injunction taking effect (Ibtimes.com.au).

What’s Next

Courts must first determine the appropriate venue for Bright’s case and whether it should be stayed until the U.S. Supreme Court decides on the regulatory authority of states over prediction markets. Even if Bright’s individual claim is unsuccessful, losing bettors in Washington may still be able to recover funds through the state’s ongoing lawsuit against Kalshi, according to Ibtimes.com.au.