Is Kalshi Legal? State-by-State Tracker

Is Kalshi legal? The answer depends on where you live and what contracts you want to trade. The CFTC-regulated exchange operates in roughly 40 US states but faces a contested enforcement posture in Arizona, a sports contract injunction in Massachusetts, the first outright state ban in Minnesota, and active litigation in more than a dozen jurisdictions. The federal appellate courts are now split — Third Circuit for Kalshi, Ninth Circuit against. Internationally, Spain temporarily blocked Kalshi and Polymarket on May 26, 2026. This tracker covers every state action, federal ruling, CFTC offensive lawsuit, and pending bill as of September 2026.

SCOTUS watch: New Jersey’s petition for certiorari in Flaherty v. KalshiEx was filed September 2, 2026; if the Court grants in the October 2026 term, a decision would land by June 2027.

The Core Legal Question

The entire Kalshi legal battle comes down to one question: does federal law preempt state gambling regulation for event contracts traded on a CFTC-designated exchange?

Kalshi’s position is straightforward. The Commodity Exchange Act grants the CFTC exclusive jurisdiction over futures, swaps, and event contracts traded on Designated Contract Markets. Kalshi holds both DCM and DCO registrations. Its event contracts — including sports contracts — are binary options settling at $1 or $0, structured as swaps under the CEA. Federal law preempts state attempts to regulate these instruments as gambling.

States see it differently. Attorneys general and gaming regulators in Arizona, Nevada, Massachusetts, Ohio, and elsewhere argue that Kalshi’s sports event contracts are functionally identical to sports bets. A contract asking “Will the Chiefs beat the Eagles?” looks, feels, and pays out exactly like a moneyline wager. States spent years building licensing frameworks, collecting taxes, and negotiating compacts with tribal gaming operators. Kalshi bypasses all of that by claiming federal exemption.

The key structural distinction Kalshi emphasizes: it operates as a peer-to-peer exchange where users trade contracts with each other. Traditional sportsbooks are bookmakers setting lines against bettors. States counter that the distinction is irrelevant to consumers placing what amounts to a sports wager. The legal sportsbook industry — DraftKings, FanDuel, Caesars, BetMGM — invested billions in state-by-state compliance. The American Gaming Association estimates prediction markets have siphoned $650M+ in would-be state sports betting tax revenue.

For a broader look at how prediction market regulation affects the industry, see our guide to prediction market legality.

State-by-State Status Table

This table reflects verified status as of September 3, 2026. States not listed are generally available without active restrictions.

Key Court Rulings

Arizona: First-Ever Criminal Charges (March 17, 2026)

Arizona Attorney General Kris Mayes filed a 20-count criminal information against KalshiEx LLC and Kalshi Trading LLC on March 17, 2026. This is the first time any state has brought criminal charges against a prediction market operator.

The charges break down into two categories. Sixteen counts allege operation of an unlicensed wagering business for accepting bets from Arizona residents on professional and college sports, player props, and proposition bets. Four counts allege election wagering — bets accepted on the 2028 presidential race, the 2026 Arizona gubernatorial race, the 2026 Arizona Republican gubernatorial primary, and the 2026 Arizona Secretary of State race. Arizona law imposes penalties of $20,000 per sports wager and $10,000 per election wager.

The timeline escalated fast. Kalshi preemptively sued the Arizona Department of Gaming on March 12 after receiving cease-and-desist letters in 2025. A federal judge denied Kalshi’s motion for a temporary restraining order on March 16. One day later, the state filed criminal charges. The Ninth Circuit subsequently denied Kalshi’s request for a stay.

CFTC chair Michael Selig responded directly, calling the charges “entirely inappropriate” and framing the dispute as jurisdictional rather than criminal. Kalshi maintains its contracts are federally regulated derivatives, not gambling products.

The criminal case was then blocked at the federal level. On April 10–11, 2026, a federal judge granted a restraining order sought by the CFTC suspending the prosecution, and Judge Michael Liburdi subsequently permanently enjoined AG Mayes from prosecuting Kalshi, holding that federal law preempts the state gambling charges. That injunction now rests on shaky ground: the Ninth Circuit’s August 28, 2026 ruling against Kalshi (below) rejects the preemption reasoning it was built on, so treat Arizona as contested rather than resolved in Kalshi’s favor.

Nevada: Temporary Restriction (March 2026)

Nevada’s Gaming Control Board sued Kalshi in early 2026, and a court imposed a temporary restriction barring Nevada users from accessing sports contracts. The restriction operates through Kalshi’s registration system rather than IP-based geofencing — users with Nevada addresses cannot place sports contract orders.

State regulators argue Kalshi failed to acquire appropriate gaming licenses and that allowing users under 21 violates Nevada law (Kalshi’s federal age requirement is 18+). The Ninth Circuit denied Kalshi’s attempt to stay the restriction early in the case, and on August 28, 2026 ruled against Kalshi on the merits (see the Ninth Circuit section below).

Tennessee: Kalshi’s Strongest Win (February 19, 2026)

US District Judge Aleta Trauger in the Middle District of Tennessee granted Kalshi a preliminary injunction on February 19, 2026, blocking enforcement of state gaming laws against the platform. This is Kalshi’s most significant legal victory in any state dispute.

Judge Trauger’s ruling found that Kalshi’s sports event contracts are “likely swaps” under the Commodity Exchange Act and that federal law likely preempts Tennessee’s sports wagering statutes. The ruling provides the strongest judicial endorsement of Kalshi’s core preemption argument to date.

Tennessee regulators had issued a cease-and-desist letter alleging illegal sports wagering. Kalshi obtained a temporary restraining order in January 2026 and then won the more durable preliminary injunction a month later.

Massachusetts: Preemption Rejected (January 2026)

A Suffolk County Superior Court judge ruled that Kalshi’s sports event contracts are subject to Massachusetts gaming laws, rejecting the CFTC preemption argument as “overly broad.” The court issued a preliminary injunction barring Kalshi from allowing Massachusetts users to place sports-related bets without a state license, effective March 8, 2026.

The Massachusetts Appeals Court stayed the injunction and ordered expedited briefing, and the Supreme Judicial Court then granted direct appellate review, skipping the Appeals Court entirely. At oral argument in early April 2026 the justices signaled skepticism of Kalshi’s preemption argument. On April 28, 2026 the CFTC filed an amicus brief asserting exclusive federal jurisdiction — while 38 state attorneys general filed on the other side. A decision is pending as of September 2026. Multiple state gaming commissions are watching this case closely as potential precedent for their own enforcement actions.

Ohio: Classified as Sports Betting (March 2026)

An Ohio judge denied Kalshi’s request for a preliminary injunction and classified its sports event contracts as sports betting under state law. The court ordered Kalshi to comply with Ohio gambling regulations. This ruling contradicts the Tennessee federal court’s finding and deepens the split between jurisdictions.

New Jersey: Third Circuit Win for Kalshi (April 2026)

The US District Court for the District of New Jersey granted Kalshi a preliminary injunction on April 28, 2025, concluding that the CEA likely preempts state enforcement against sports event contracts. New Jersey’s Division of Gaming Enforcement appealed to the Third Circuit.

Oral arguments were held on September 10, 2025 before Chief Judge Chagares, Judge Porter, and Judge Roth. Legal observers noted the proceedings appeared favorable for Kalshi, with Judge Porter suggesting Kalshi only needs to demonstrate a “significantly better than negligible argument” to sustain the injunction. The Third Circuit ruled 2-1 for Kalshi in KalshiEx LLC v. Flaherty, No. 25-1922 (3d Cir. Apr. 6, 2026), holding the CEA preempts New Jersey’s gambling laws for DCM-listed sports event contracts — Kalshi’s strongest appellate authority to date. New Jersey has since taken the question to the Supreme Court (see below), but the immediate effect is that Kalshi’s sports contracts remain available to New Jersey residents.

Ninth Circuit: The Split Becomes Real (August 28, 2026)

A unanimous Ninth Circuit panel ruled against Kalshi on August 28, 2026, holding that states can enforce their gambling laws against sports event contracts. The panel’s reasoning strikes at the foundation of Kalshi’s argument: sports event contracts fail the Commodity Exchange Act’s definition of a “swap,” so the CFTC’s exclusive jurisdiction never attaches. This is the direct opposite of the Third Circuit’s April holding — a clean circuit split on the same question, decided five months apart.

The practical effect inside the Ninth Circuit is immediate. Nevada and Arizona sit in that circuit, and the ruling revives state enforcement leverage that Kalshi’s district-court wins had suspended. Agents should treat every Ninth Circuit state as enforcement-exposed until the Supreme Court resolves the split.

The Cert Petition (September 2, 2026)

New Jersey Attorney General Jennifer Davenport filed a petition for certiorari in Flaherty v. KalshiEx on September 2, 2026, asking the Supreme Court to decide whether CFTC-regulated exchanges can offer sports event contracts without state gambling licenses. With the Third and Ninth Circuits split, a grant is substantially more likely than when this page last assessed the odds. If the Court grants in the October 2026 term, a decision would land by June 2027.

Minnesota: First Outright State Ban (May 2026)

Minnesota became the first US state to enact an outright statutory ban on prediction markets in May 2026, prohibiting the offering of event contracts regardless of CFTC registration status. The CFTC sued Minnesota in federal court (Press Release 9233-26) arguing the state law is preempted by the Commodity Exchange Act and that prediction markets fall within exclusive federal jurisdiction.

This is a qualitatively different challenge than civil enforcement: rather than litigating whether existing gambling statutes apply, Minnesota wrote a new statute specifically targeting CFTC-regulated event contracts. The case is likely to set the most direct precedent yet on whether states can simply legislate around federal preemption arguments. As of May 2026 the litigation is in its early stages.

CFTC Offensive Litigation Across States

In a notable posture shift, the CFTC itself moved on the offensive in 2026, filing federal suits against multiple states that it argues are intruding on its exclusive jurisdiction over event contracts. The CFTC sued Arizona, Connecticut, and Illinois (Press Release 9206-26), then Wisconsin (PR 9220-26), New York (PR 9218-26), and Minnesota (PR 9233-26). The agency frames these as preemption-enforcement actions rather than enforcement against the states’ general gambling authority.

This is unusual: a federal regulator suing states to preserve operating room for a regulated firm. For agents, the practical takeaway is that the federal government has the firm’s back in court, but state-level access is still uncertain until each suit resolves — geofencing logic should treat sued states as operationally unstable, not safely “preempted.”

Spain: Temporary International Block (May 26, 2026)

On May 26, 2026, Spain announced a temporary block of both Kalshi and Polymarket, citing the absence of Spanish gambling licenses. This is the first major non-US enforcement action against a CFTC-regulated event-contract venue and signals that the international regulatory perimeter is beginning to harden around prediction markets — at least in jurisdictions with established gambling-licensing regimes.

For agents, the implications are jurisdictional: even users routed through Spanish IPs or registered with Spanish residency may lose access. See our news coverage of the Spain block for full context.

CFTC Rulemaking and Advisory (March 2026)

In March 2026, the CFTC issued both a prediction-markets advisory (Press Release 9193-26) and an advanced notice of proposed rulemaking (PR 9194-26). The advisory clarified the agency’s view on contract structures it considers within its jurisdiction; the ANPRM solicits public input ahead of formal rulemaking that would codify how event contracts are listed, surveilled, and cleared. This is the first time the CFTC has signaled a comprehensive rulemaking effort specific to prediction markets and is widely seen as the legal foundation the agency will rely on in its state-preemption litigation.

Federal Legislation Tracker

Four major federal bills target prediction market contracts as of September 2026. None have passed.

BETS OFF Act — Introduced by Senator Chris Murphy (D-CT) and Representative Greg Casar (D-TX). Would prohibit prediction market event contracts involving government actions, terrorism, war, and assassination. Narrower scope than other bills.

Prediction Markets Are Gambling Act — Introduced March 23, 2026 by Senator Adam Schiff (D-CA) and Senator John Curtis (R-UT). Bipartisan bill that would amend the CEA to prohibit any CFTC-registered entity from listing contracts tied to sporting events, athletic competitions, or casino-style games. Covers amateur, collegiate, and professional sports.

STOP Corrupt Bets Act — Introduced March 26, 2026 by Senator Jeff Merkley (D-OR), Senator Elizabeth Warren (D-MA), Senator Richard Blumenthal (D-CT), Senator Chris Van Hollen (D-MD), and Senator Sheldon Whitehouse (D-RI), with Representative Jamie Raskin (D-MD) in the House. The broadest bill — would ban prediction market contracts on elections, sports, war, and government actions. Supported by Public Citizen, Americans for Financial Reform, and CREW.

Fair Markets and Sports Integrity Act — Broader restrictions on sports event contracts with integrity protections. Aimed at preventing manipulation of sports outcomes through prediction market positions.

PREDICT Act — Introduced by Representative Adrian Smith (R-NE) and Representative Nikki Budzinski (D-IL). Would ban senior government officials from insider trading on prediction markets. Narrower scope focused on ethics rather than market structure.

The passage outlook for any of these bills is uncertain. President Trump would need to sign any legislation into law, and his family has direct financial ties to the prediction market industry — Trump Jr. is a Kalshi strategic advisor and has invested in Polymarket through his venture capital firm.

The Political Landscape

The Kalshi legal battle plays out against a sharply divided political landscape where traditional partisan lines do not apply cleanly.

Trump administration support. CFTC chair Michael Selig, Trump’s appointee and the sole commissioner on the five-seat body, has actively defended CFTC exclusive jurisdiction over event contracts. Selig withdrew the Biden-era proposed ban on election-related prediction markets, called Arizona’s criminal charges “entirely inappropriate,” and announced creation of an Innovation Advisory Committee — a 35-member panel that includes the CEOs of both Kalshi and Polymarket — to help draft prediction market regulations. Donald Trump Jr. serves as a Kalshi strategic advisor. Truth Social plans prediction market integration via Crypto.com.

Industry lobbying. Kalshi spent approximately $1M on lobbying in 2025. The Coalition for Prediction Markets — comprising Kalshi, Robinhood, Coinbase, Crypto.com, and Underdog — is spending millions more in 2026. Robinhood, which routes over 50% of Kalshi’s retail volume, acquired the MIAXdx exchange (closed January 20, 2026) and plans to launch its own prediction market exchange in 2026.

AGA opposition. The American Gaming Association represents traditional sportsbooks and casino operators who spent years and billions securing state-by-state licenses. The AGA and 27 state attorneys general joined a California tribal gaming amicus brief in a prediction market appeal. The AGA estimates prediction markets have diverted more than $650M in potential state sports betting tax revenue.

Tribal gaming opposition. This may be the most potent opposition force. Tribal gaming operators hold exclusive compacts in states like California, Wisconsin, and Oklahoma. The California Nations Indian Gaming Association (CNIGA), led by Chair James Siva, has branded prediction markets an existential threat to tribal sovereignty. The Indian Gaming Association partnered with the AGA for a national lobbying campaign. Tribal governments in California and Wisconsin have filed federal lawsuits against Kalshi alleging violations of the Indian Gaming Regulatory Act and tribal-state compacts. Tribal gaming revenue funds essential government services for many nations — this is a sovereignty and economic survival issue, not just a competitive complaint.

What This Means for Agents

The fragmented legal landscape creates concrete engineering requirements for anyone building trading agents on Kalshi’s API.

State-aware execution. Bots must check user and operator jurisdiction before placing orders. Kalshi’s registration-based restriction model in Nevada means account-level blocks rather than IP geofencing. Agents operating on behalf of users in restricted states will have orders rejected at the API level. Implement jurisdiction checks in your identity layer before any order submission.

Geofencing and compliance. Kalshi argued in court that IP-based geofencing is “too costly and impractical” but has implemented registration-based restrictions in Nevada and other states. Agents should not rely on VPN workarounds — Kalshi can and does block accounts based on registration address. For KYC compliance requirements, agents must verify that the user’s registered state permits the contract type being traded.

Settlement risk. Contracts placed before a restriction takes effect may face uncertain settlement if a state suddenly blocks access. Arizona’s criminal charges came one day after a federal TRO was denied — that kind of rapid escalation creates real settlement risk for open positions. Agents should implement circuit-breaker logic that monitors legal developments and can halt trading in affected jurisdictions.

Monitoring requirements. Subscribe to Kalshi’s status updates and build alerting for state-level legal changes. The pace of litigation in early 2026 — Arizona, Nevada, Ohio, and multiple federal bills in a single month — means legal conditions can change faster than quarterly code reviews. Consider building a legal status endpoint into your agent’s configuration that flags restricted states. For cross-platform strategies, see our Kalshi vs Polymarket comparison and the Kalshi platform guide.

Circuit-level risk. After August 28, 2026, state-keyed geofencing logic is no longer granular enough on its own — circuit membership is itself a risk dimension. A state with no active enforcement action that sits in the Ninth Circuit (where state authority over sports contracts is judicially validated) carries materially more regulatory risk than an equivalent state in the Third Circuit. Weight jurisdiction checks accordingly until the Supreme Court resolves the split.

Multi-platform fallback. Agents targeting sports contracts should implement fallback logic to route orders to alternative platforms when Kalshi access is restricted in a given state. The agent betting stack architecture supports multi-exchange routing at the trading layer.

The Supreme Court Path

The jurisdictional split across federal and state courts makes Supreme Court review increasingly likely, though timing remains uncertain.

The circuit split is here. The Third Circuit ruled for Kalshi on April 6, 2026 (2-1, KalshiEx LLC v. Flaherty), holding the CEA preempts state gambling laws for DCM-listed sports event contracts. The Ninth Circuit ruled against Kalshi on August 28, 2026 (3-0), holding sports event contracts are not swaps and CFTC exclusive jurisdiction never attaches. New Jersey’s cert petition is on file as of September 2, 2026; the question presented is whether sports event contracts are swaps within the CFTC’s exclusive jurisdiction. State courts in Massachusetts and Ohio have separately rejected preemption, and Minnesota’s outright statutory ban — now in CFTC v. Minnesota — adds a further front: whether a state can legislate around the preemption argument altogether.

Murphy v. NCAA (2018) precedent. The Supreme Court struck down the Professional and Amateur Sports Protection Act in Murphy v. NCAA, holding that Congress cannot “commandeer” state legislatures by prohibiting them from authorizing sports betting. That ruling opened the door to state-regulated sports betting. Kalshi now argues the CEA does something different — it doesn’t prohibit states from acting, it preempts them from regulating federally supervised instruments. Whether the current Court draws the same distinction is an open question.

Current Court dynamics. The business-friendly majority may be sympathetic to federal preemption for regulated exchanges. But the Court has also shown deference to state regulatory authority, particularly where consumer protection and gambling are concerned. The tribal sovereignty dimension adds another layer — IGRA protections have strong judicial precedent.

The vehicle is now concrete: Flaherty v. KalshiEx, the New Jersey case, with the cert petition filed September 2, 2026. If the Court grants in the October 2026 term, a decision would land by June 2027.

Tracking Updates

This page will be updated as new rulings, legislation, and enforcement actions occur. For the latest on Kalshi’s platform, fees, and trading mechanics, see the Kalshi review, the Kalshi fees guide, and the Kalshi API guide. For news coverage of specific incidents, see our reporting on the death contract carveout and the MrBeast insider trading fine. Agent builders should also review the Kalshi agents platform page for integration specifics.