Is Kalshi Legal? State-by-State Status (September 2026)
Kalshi is legal at the federal level and has been since November 2020, when it became a CFTC-regulated Designated Contract Market. That part is settled and nobody is seriously litigating it.
What is being litigated, in more than a dozen states, is whether Kalshi's sports event contracts are financial derivatives or sports bets wearing a costume. Two federal appeals courts have now answered that question in opposite directions, three petitions are waiting at the Supreme Court, and your access to sports markets depends on your state.
Non-sports markets are barely touched by any of this.
The actual legal question
Kalshi's argument runs in two steps. Its contracts are "swaps" under the Commodity Exchange Act. Swaps traded on a Designated Contract Market fall under exclusive CFTC jurisdiction, which preempts state gambling law.
If both steps hold, states cannot touch it. If either fails, they can.
On April 6, 2026, the Third Circuit accepted that argument 2-1 in New Jersey's case and held that Kalshi's sports contracts are likely swaps.
On August 28, 2026, the Ninth Circuit rejected it 3-0 in Nevada's case. Judge Ryan Nelson's opinion agreed that the CEA does preempt state rules for genuine swaps on a DCM, then held that Kalshi's sports contracts are not genuine swaps. In his words, their substance "is sports gambling, regardless of whether Kalshi calls them swaps." The panel also leaned on CFTC Rule 40.11, which currently bars exchanges from listing contracts that involve gaming.
That is a clean circuit split, and it is already at the Supreme Court. New Jersey filed a petition on September 2 asking the Court to reverse the Third Circuit; it was docketed on September 8, and Kalshi's response is now due November 9, so do not expect the Court to decide whether to hear it before then. Robinhood and Crypto.com, which were parties to the Nevada ruling, filed their own petitions on September 10 and 11. Kalshi took a different route and asked the full Ninth Circuit to rehear its case, filing on September 11.
Two more rulings went against Kalshi in September. On September 8 a federal judge in Iowa refused to block the state's gambling laws, and on September 16 a separate Ninth Circuit panel held that two California tribes are likely to show Kalshi's sports contracts are illegal Class III gaming when placed from tribal land. That tribal case turns on the Indian Gaming Regulatory Act rather than state law, and it went back to the trial court to decide whether an injunction should issue.
The one development cutting the other way is regulatory. In June the CFTC proposed rewriting Rule 40.11 to set out when an event contract "involves" gaming and what happens then. Because the Ninth Circuit relied on the current version of that rule, Kalshi argues the rewrite will undercut the ruling. As of this update the proposal is a proposal.
Where things stand, as of September 24, 2026
Four buckets, because "legal" and "illegal" do not describe this accurately.
Sports contracts blocked by a court order
| State | What happened |
|---|---|
| Nevada | A Carson City judge issued a restraining order on March 20 and then a preliminary injunction requiring Kalshi to geofence sports, election and entertainment contracts. The Nevada Supreme Court refused to pause it on July 1. The Ninth Circuit's August 28 ruling upheld the federal court's refusal to shield Kalshi |
| Washington | King County Judge John McHale granted a preliminary injunction July 20. The amended injunction signed August 12 bars sports, elections, politics, entertainment, culture, tech and science, and "mentions" contracts, with an IP and residency geofence due August 19 and a GeoComply geofence due September 2. The state Court of Appeals refused to stay it |
| Michigan | The Attorney General's case was sent back to state court in June. A temporary restraining order followed that month, and on September 1 Ingham County Judge Rosemarie Aquilina granted a preliminary injunction requiring Kalshi to keep geofencing sports contracts, with violations punishable at $500,000 a day |
Courts have sided with the state, enforcement pending or in progress
| State | What happened |
|---|---|
| Ohio | A federal judge denied Kalshi an injunction in March. The Casino Control Commission issued a notice of intent to fine Kalshi $5 million on April 14, and the Sixth Circuit refused to block enforcement on April 24, calling the preemption arguments "largely in equipoise (if not favoring Ohio)." The expedited appeal was argued July 30 and is undecided |
| New York | Judge Analisa Torres denied Kalshi's injunction on July 7, holding state gambling law applies. The Attorney General and Governor then sued Kalshi in state court on July 31, seeking disgorgement, restitution and penalties of three times its gains |
| Connecticut | Judge Vernon Oliver denied Kalshi's injunction on August 10, writing that the contracts are "at bottom" sports wagers. Kalshi appealed to the Second Circuit, and the state filed its own enforcement suit on August 26 |
| Utah | Judge Robert Shelby entered final judgment for the state on August 4. The Tenth Circuit denied Kalshi an injunction pending appeal on September 8 |
| Iowa | Judge Stephen Locher denied Kalshi's injunction on September 8. Kalshi had sued before the state took any enforcement step |
| Maryland | A federal judge denied Kalshi's injunction in August 2025. The state agreed not to enforce until the Fourth Circuit rules. That appeal was argued May 7, 2026, and we could not find a decision |
States where enforcement is blocked or on hold
| State | What happened |
|---|---|
| New Jersey | The Third Circuit upheld Kalshi's injunction on April 6. New Jersey's Supreme Court petition is pending |
| Tennessee | Judge Aleta Trauger granted Kalshi a preliminary injunction on February 19. The state's appeal was argued in the Sixth Circuit on July 30 alongside Ohio's |
| Arizona | The Attorney General filed 20 criminal counts in March. At the CFTC's request, a federal judge blocked the prosecution in April and extended that into a longer injunction on May 5. The Attorney General says the Ninth Circuit's Nevada ruling gives her grounds to ask him to revisit it |
| Minnesota | The first outright state ban was due to take effect August 1. On July 27 Judge Kate Menendez granted Kalshi, Polymarket US and the CFTC a preliminary injunction against enforcing it |
| Massachusetts | A Suffolk Superior Court judge ruled for the state in January 2026, but the Appeals Court stayed that injunction on February 17 pending appeal. The Supreme Judicial Court heard the case May 4 and we could not find a decision |
| Montana | Kalshi and the state jointly dismissed Kalshi's federal suit on September 17. Montana agreed not to enforce while the Ninth Circuit rehearing request is pending, and to give 30 days' notice before acting |
Active cases or threats with no decisive ruling yet
Wisconsin (state suit filed April 23), Kentucky (Attorney General suit filed June 17), New Mexico, Rhode Island (dueling suits filed May 21) and Illinois all have cases in progress. In several of them the CFTC has sued the state in response, which tells you how unusual this fight is. California has no state enforcement action, but the tribal ruling above applies on tribal land in the state.
Missouri is the newest front. Attorney General Catherine Hanaway sent cease-and-desist letters to Kalshi, Polymarket, Robinhood, Crypto.com, Novig and Underdog, announced on September 18, telling them to stop offering sports contracts or get licensed within 30 days of the letters. Kalshi's letter is dated September 16.
Baltimore filed consumer protection actions against Kalshi and Polymarket on August 13, 2026, which opened a city-level front as well.
If your state is not named here, we did not find a court order or active enforcement action against Kalshi's sports contracts there. That is not the same as a guarantee.
Is Kalshi gambling?
Functionally, buying a Yes contract on an uncertain outcome carries the same risk shape as a wager. Legally it has been treated as trading a federally regulated derivative, which is what lets Kalshi operate in states that never legalized sports betting.
Both things are true at once, and the disagreement between them is exactly what the courts are working through. The Ninth Circuit's Nevada opinion is now the strongest statement that the functional reading should win. The Third Circuit's is the strongest statement that the legal one should.
For tax purposes the distinction already matters: Kalshi issues a 1099-B and reports your activity as trading rather than gambling winnings.
What this means if you actually want to trade
Check your own state before you fund an account, and check again if you come back after a few months away. This list moved a lot in the six weeks since our last update: Michigan went from a restraining order to an injunction, Utah and Iowa added rulings, Montana stood down, Missouri sent letters and the whole question reached the Supreme Court.
If sports contracts are restricted where you live, the rest of the platform generally is not. Washington's amended injunction shows the edge clearly: it bars most categories, but commodities, climate, economics and finance markets stay open there. Nobody has argued that a CPI print resembles a parlay, so those categories have stayed out of the fight almost everywhere.
None of this is legal advice. If you are trading meaningful size, verify the current position in your state rather than trusting any article, this one included.
Frequently Asked Questions
Is Kalshi legal in all states?
Can I get in trouble for using Kalshi?
Is Kalshi gambling or not?
What is Kalshi being sued for?
Why is Kalshi legal but Polymarket was not?
Sources
- Ninth Circuit opinion, KalshiEX v. Assad, August 28 2026
- Third Circuit opinion, KalshiEX v. Flaherty, April 6 2026
- Supreme Court docket 26-299, Flaherty v. KalshiEX
- Ninth Circuit opinion, Blue Lake Rancheria v. Kalshi, September 16 2026
- Nevada Gaming Control Board statement on the Ninth Circuit ruling, August 28 2026
- Washington Attorney General on the amended injunction, August 13 2026
- Michigan court orders Kalshi to keep blocking sports markets, The Block, September 3 2026
- New York sues Kalshi, Attorney General, July 31 2026
- Connecticut sues Kalshi, Attorney General, August 26 2026
- Missouri Attorney General cease-and-desist letters, September 18 2026
- Kalshi and Montana agree to dismiss lawsuit, InGame, September 21 2026
- Iowa judge denies Kalshi injunction, Courthouse News
- CFTC proposed rule on event contracts involving gaming, June 10 2026
- Baltimore consumer protection actions, August 13 2026
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Juan Sebastian Brito is the CEO and Co-Founder of Bet Hero, a sports betting analytics platform used by thousands of bettors to find +EV opportunities and arbitrage. With a background in software engineering and computer science from FIB (Universitat Politècnica de Catalunya), he built Bet Hero to bring data-driven, mathematically-proven betting strategies to the mainstream. His work focuses on probability theory, real-time odds analysis, and building tools that give bettors a quantifiable edge.
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