Where the case stands right now
Attorney General Nick Brown filed the lawsuit on March 27, 2026 in King County Superior Court. The state is seeking a permanent injunction blocking Kalshi from operating in Washington, restitution for residents' losses, and civil penalties under the state Gambling Act and Consumer Protection Act.
Kalshi tried to move the case to federal court, arguing that its CFTC-regulated status created federal question jurisdiction. The district court remanded the case back to state court. Kalshi then asked the Ninth Circuit Court of Appeals to stay the remand order while it appealed, and on May 21, 2026 the Ninth Circuit denied that request. The Washington case is now proceeding in King County Superior Court.
No preliminary injunction has been issued yet. Kalshi remains accessible to Washington residents while the case develops, but the platform's continued operation in the state is uncertain.
Why Washington is suing Kalshi
Washington has held some of the most restrictive online gambling rules in the country. Internet gambling has been banned since 2006, and legal sports activity is restricted to in-person play at tribal casinos. Against that backdrop, the state's complaint argues that Kalshi's event contracts fit the statutory definition of gambling under state law.
Under RCW 9.46.0237, gambling means "staking or risking something of value upon the outcome of a contest of chance or a future contingent event not under the person's control." The state argues that buying a Yes contract for $0.40 on the chance an event resolves Yes is functionally the same activity.
The complaint focuses heavily on Kalshi's sports markets, which is the category most directly at odds with Washington's tribal-casino-only sports rules. The filing cites the platform's spread, total, and player-prop products on college and professional sports as products that would require a Washington State Gambling Commission license to operate legally. Kalshi does not hold one.
The attorney general's filing also flags concerns about marketing to young adults, including the recruitment of college student influencers. It cites a Kalshi advertisement that the state argues shows the company knew its product circumvented Washington gambling laws. For broader context on how the state-by-state legal landscape works, see our guide on whether prediction markets are legal.
Kalshi's federal preemption defense
Kalshi's position is that it is not a sportsbook or gambling operator, but a federally regulated exchange for binary derivatives. Each contract is a Yes or No question on a real-world outcome, with prices set by supply and demand and settlement at $0 or $1. That makes the product a financial derivative under the Commodity Exchange Act, not a gambling activity under Washington gaming statutes. Our guide on what event trading is covers the mechanics in more detail.
The CFTC granted Kalshi Designated Contract Market status in 2020, and the agency has publicly supported the platform's position. CFTC Chair Michael Selig has stated the agency will defend its exclusive regulatory authority over event contracts, and the agency filed its own lawsuits against Arizona, Connecticut, and Illinois in April 2026 to block state enforcement against prediction markets.
Federal preemption is the core argument, and the federal courts have split on it. The Third Circuit ruled for Kalshi in April 2026, holding that sports event contracts are swaps under the Commodity Exchange Act and that CFTC oversight preempts state law. A federal court in Tennessee reached the same conclusion in February 2026. But the Massachusetts Superior Court ruled the other way in January 2026, issuing a preliminary injunction. A federal judge in Nevada dissolved an injunction that had previously protected Kalshi's sports markets there. Different courts, different conclusions.
How the Washington case fits the national picture
Washington is part of a wave of state actions that escalated sharply in early 2026. Nevada won a temporary restraining order in March, then a preliminary injunction. Arizona filed criminal charges in March, the first criminal prosecution of a prediction market operator. Massachusetts issued a state-court preliminary injunction in January. Wisconsin filed for one in June. Minnesota's outright ban on prediction markets takes effect August 1, 2026. More than a dozen states now have active enforcement actions of some kind.
The Ninth Circuit, which covers Washington, heard Nevada's parallel appeal in April 2026, and the panel appeared skeptical of Kalshi's preemption arguments during oral argument. A ruling for Nevada would create a circuit split with the Third Circuit's pro-Kalshi decision. That kind of split typically attracts Supreme Court review, and prediction market preemption is now widely expected to reach the highest court. The outcome of those federal appeals will shape what happens in the Washington case.
What Washington residents can currently do on Kalshi
As of 2026, the platform remains accessible to verified Washington residents 18 or older, with the full market lineup available. That access may not last, but the practical situation today is that Kalshi works the same in Washington as it does in any state where Kalshi operates without restriction.
Sports markets
Kalshi's sports markets are at the center of the Washington lawsuit, but they remain available to Washington users while the case proceeds. The platform covers the NFL, NBA, MLB, NHL, college football, college basketball, soccer, and other major leagues. Washington-relevant markets include the Seahawks, Mariners, Kraken, Sounders, and college programs like the Huskies, Cougars, and Gonzaga. Our breakdown of Kalshi's sports markets covers the full lineup.
Politics and elections
Political markets cover presidential races, congressional control, state-level contests, and individual policy outcomes. Washington-specific markets appear during election cycles, including state gubernatorial and statehouse races.
Economics and finance
Federal Reserve rate decisions, monthly jobs reports, CPI prints, GDP figures, and gas-price markets. These contracts often move sharply in the seconds after an official data release.
Climate and weather
Daily temperature and rainfall markets cover Seattle and other Washington cities. Broader climate markets include Atlantic hurricane activity, snowpack-related contracts, and longer-term temperature thresholds, with settlement tied to verified data sources.
Crypto and culture
Crypto markets cover digital-asset events like Bitcoin and Ethereum price thresholds, traded in US dollars. Culture markets cover award shows, box-office milestones, and other entertainment outcomes.
Signing up from Washington
Account creation works the same in Washington as anywhere else Kalshi operates. Whether the platform remains accessible to Washington residents long-term depends on how the King County case develops.
- Start at the Kalshi sign-up page: Visit the website or download the iOS or Android app.
- Provide your details: Register via email, Google, or Apple, then enter your full legal name, date of birth, and Washington address.
- Pass identity verification: Kalshi runs an automatic check on the information you submit. If it cannot match, you will be prompted to upload a photo of your ID and a proof of address.
- Fund your account: ACH bank transfers and PayPal are free. Debit card works with a 2% deposit fee. Minimum deposit is typically $10.
- Find a market: Browse by category, check the trending tab, or search a specific event. Tap a market, pick Yes or No, set your size, and confirm.
The bottom line and what to watch for next
Kalshi is currently accessible in Washington, but the platform's continued operation in the state is uncertain. The state attorney general is actively pursuing a lawsuit, the case has been remanded to state court (a less favorable venue for Kalshi's preemption arguments), and the Ninth Circuit has been skeptical of similar arguments in the Nevada case. There is no court order blocking the platform in Washington as of 2026, but that picture could change quickly.
The decision points worth tracking are the state's preliminary injunction motion in King County, the Ninth Circuit's pending ruling on Nevada's case, and any Supreme Court grant of review if a circuit split emerges. For a broader look at how event trading on regulated exchanges differs from state-licensed sports operations, see our breakdown of prediction markets vs sportsbooks. And for a full look at how Kalshi operates as a platform, see our full Kalshi review.
Washington Kalshi FAQ
Is Kalshi legal in Washington state?
The legal status is contested. Kalshi remains operational and accessible to Washington residents as of [yyyy], but the state attorney general has filed a lawsuit alleging the platform operates as illegal gambling under state law. No court has yet issued an injunction shutting it down, but the case is active in King County Superior Court.
Can you use Kalshi in Washington right now?
Yes. The platform remains accessible to Washington residents 18 or older while the lawsuit proceeds. ACH transfers, debit cards, PayPal, Venmo, and crypto all work for deposits and withdrawals. Whether this remains the case depends on how the court rules.
How is Kalshi available in Washington despite the lawsuit?
Kalshi operates as a CFTC-regulated Designated Contract Market, and the company argues that federal commodities law preempts state gambling regulation. No court has ordered Kalshi to stop serving Washington residents, so the platform continues to operate while the dispute is litigated. The state disputes the preemption argument, and the case is now in state court.
Does Kalshi work in Washington for sports markets?
Sports markets are currently available, but they are at the center of the state's lawsuit. Washington's complaint specifically targets Kalshi's sports event contracts, arguing they would require a Washington Gambling Commission license. If the state succeeds, sports markets are the most likely category to be restricted first.
Has Kalshi been banned in Washington?
No, not as of [yyyy]. The state is seeking a permanent injunction, but no court has granted one yet. The case is in early stages in King County Superior Court following remand from federal court.
Is Kalshi allowed in Washington for political markets?
Currently yes. Political markets are available alongside the rest of the platform. The state's lawsuit covers all of Kalshi's event contracts, not just sports, so all categories are theoretically at risk if the state prevails.
What is the minimum age to use Kalshi in Washington?
18 years old. Identity verification is required before any trading or withdrawal.
What happens to my funds if Kalshi is blocked in Washington?
Washington residents would need to close out their positions and withdraw funds, similar to what happened in Nevada after the temporary restraining order there. Specific timelines and procedures would depend on the court order and Kalshi's response. Account funds themselves are held in segregated accounts under CFTC requirements, so they are not at risk independently of the legal situation.
