Sports prediction markets are no longer a niche corner of fintech; they’ve become one of the sharpest legal fights in US gambling, derivatives, and state regulatory law.
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The core question sounds simple: Are sports prediction markets legal? The answer is complicated. They may be legal when offered as event contracts on a federally regulated exchange, but several states argue that the same products are just unlicensed sports betting under a different name.
Kalshi, Polymarket, the Commodity Futures Trading Commission (CFTC), state gaming regulators, attorneys general, and tribal gaming interests are all arguing over that core question.
Already, the legal fight has produced contradictory outcomes. New Jersey and Arizona have delivered important wins for the federal prediction-market model, while New York, Nevada, Massachusetts, and Michigan have strengthened the state-gambling argument.
Legal sports betting exploded after the supreme court’s 2018 decision in Murphy v. NCAA. The court held that the federal ban preventing states from authorizing sports betting violated the anti-commandeering principle, clearing the way for states to set their own sports-betting regimes.
That decision created a state-by-state sportsbook industry built around licenses, geofencing, tax rates, age checks, responsible-gaming rules, and state gaming commissions. By 2025, sports betting had become one of the fastest-growing pieces of the commercial gaming market. Sports betting revenue reached $16.96 billion in 2025 on $166.94 billion in handle, while state-regulated sportsbooks generated $3.71 billion in taxes.
Prediction markets challenge that structure. Instead of placing a bet with a sportsbook, a user buys or sells a contract tied to a future event: a team winning a game, a player hitting a stat line, a tournament outcome, or an election result. The CFTC describes these products as event contracts, which are often structured as swaps and have existed in regulated US markets for more than two decades.
If a sports event contract is a federally regulated derivative, state gaming regulators may have little room to interfere. If it is functionally sports betting, states argue that platforms need the same licenses, taxes, and consumer protections as DraftKings, FanDuel, or BetMGM.
The CFTC designated KalshiEX as a designated contract market in November 2020, requiring it to comply with the Commodity Exchange Act and CFTC rules applicable to designated contract markets (DCMs). On that basis, Kalshi argues that its sports event contracts are not illegal wagers but swaps traded on a CFTC-licensed exchange. Under that view, federal commodities law preempts state gambling laws when those laws try to block trading on a federally regulated market.
This argument scored a major win in New Jersey. In April 2026, the third circuit held that Kalshi’s sports-related event contracts are swaps traded on a CFTC-licensed DCM and that the CFTC has exclusive jurisdiction over them. The court said New Jersey’s attempt to apply its gambling laws would interfere with Kalshi’s federally regulated market.
That ruling is the cleanest appellate-level victory for Kalshi so far. It supports the idea that states cannot simply relabel a federally listed event contract as gambling because the underlying event is a sports result.
But the decision also showed why the issue is unsettled. The dissent argued that gambling has traditionally been regulated by the states and that Kalshi’s sports-event contracts should not automatically displace state gambling law.
Kalshi and Polymarket should not be treated as identical. Kalshi is already the main US sports-contract courtroom test case. Polymarket’s US return came through QCX LLC d/b/a Polymarket US, which the CFTC lists as a designated contract market as of July 9, 2025.
Polymarket US is expected to be more centralized and compliance-heavy than the global crypto-native Polymarket platform. AP reports that Polymarket is trying to reestablish US trust after years offshore while distinguishing the regulated US business from its international platform.
The most important recent setback for Kalshi came in New York.
On July 8, 2026, Reuters reported that US District Judge Analisa Torres denied Kalshi’s request to block New York from enforcing its gambling laws against the platform. Torres held that Kalshi had not shown it was likely to succeed on the argument that the Commodity Exchange Act superseded New York gambling law as applied to Kalshi’s sports-event contracts. Kalshi appealed the decision to the second circuit.
New York effectively said that even if Kalshi is federally regulated, that does not give it a free pass to offer sports betting-like products without state gambling oversight. Torres also emphasized New York’s interests in preventing gambling addiction, preserving sports integrity, and avoiding a proliferation of unregulated contracts.
This creates a sharp split with New Jersey. In New Jersey, the third circuit treated Kalshi’s sports contracts as federally protected swaps. In New York, Judge Torres allowed state gambling enforcement to continue, at least at the preliminary injunction stage.
The divide is so clear that the issue may eventually need supreme court review, and the debate is already attracting political attention.
Another aspect of the debate surfaced in New Mexico.
In New Mexico, Attorney General Raúl Torrez sued Kalshi, alleging that the platform is offering illegal online sports betting under New Mexico law. The complaint seeks to block Kalshi from offering sports wagering in the state.
New Mexico also brings tribal gaming concerns into the prediction-market fight. The CFTC then sued New Mexico, arguing that the state is infringing federal jurisdiction over CFTC-registered contract markets.
That federal response is part of a broader CFTC strategy. The CFTC has challenged state regulatory activity in Arizona, Connecticut, Illinois, Kentucky, Minnesota, New Mexico, Rhode Island, Wisconsin, and New York.
The current contradictions are now visible across major states.
In New Jersey, Kalshi has its strongest appellate win when the third circuit held that the CFTC has exclusive jurisdiction over Kalshi’s sports-related event contracts traded on its federally licensed DCM.
In Arizona, a federal judge temporarily barred the state from enforcing gambling laws against prediction-market operators and paused a criminal case against Kalshi, finding that the CFTC had jurisdiction under the Commodity Exchange Act and that Kalshi’s contracts were swaps preempting state law.
In New York, the result went the other way. Judge Torres denied Kalshi’s bid to block state gambling enforcement, holding that Kalshi had not shown that federal law superseded New York gambling law for its sports-event contracts.
In Nevada, a federal judge ruled that Kalshi is subject to Nevada gaming rules and rejected the company’s argument that it should be regulated solely by the CFTC. The ruling was especially significant because Nevada remains the historical center of US sports betting regulation.
In Massachusetts, a judge ruled that Kalshi could not let residents bet on sports through its online platform after the state attorney general accused the company of violating gaming laws.
In Michigan, a judge blocked Kalshi from allowing residents to place sports bets, making Michigan another state with a court-ordered restriction on Kalshi’s sports event contracts.
| State | Why it matters |
| Minnesota | First major state felony-style crackdown. Minnesota House research said the law establishes a felony penalty for continuing to offer a prediction market after a cease-and-desist letter. |
| Kentucky | Enacted a 14.25% tax on prediction-market operators’ transaction fees; Kalshi, Polymarket, and others sued to block it. |
| Illinois | Moved to tax or classify sports-related exchange wagers under the sports-wagering framework; Kalshi sued over the new tax. |
| North Carolina | Proposed budget language would legitimize and tax prediction markets under CFTC jurisdiction, showing that not all state moves are bans. |
| New York | Litigation plus possible legislative response — New York is a key state because of Judge Torres’s ruling and the state’s aggressive gambling-enforcement posture. |
Prediction markets are not simply legal or illegal. Their status depends on the platform, contract type, state, court, and timing. Prediction markets have become a new state regulatory frontier in 2026, with lawmakers considering policy levers such as prohibitions, licensing, taxation, age limits, and restrictions on sensitive event categories.
Weather, inflation, elections, crypto, or macro contracts may raise their own issues, but sports are uniquely sensitive because states already built full sports-betting regimes after Murphy. Sports contracts, therefore, threaten existing tax receipts, sportsbook licenses, tribal gaming arrangements, and consumer-protection systems.
The question isn’t “Are sports prediction markets legal?” now; the question is, “Will they stay that way?”
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