Prediction Markets in Montana: A Lottery-Monopoly State Meets a Federal Exchange

The blunt answer: legally contested and operationally uncertain, with Montana squarely treating them as illegal gambling and the leading operator fighting that position in federal court. As of August 2, 2026, no court has ruled on the merits of whether Montana can enforce its gambling laws against a CFTC-registered exchange, so nothing is settled either way.

Here is the specific posture that makes Montana different from a quiet “available” state. Montana’s Department of Justice, through its Gambling Control Division, has formally concluded that trading sports event contracts is “illegal gambling within the meaning of Montana law.” It said so in a cease-and-desist letter dated April 6, 2026, warning Kalshi that continuing to serve Montana residents could trigger “legal action against” the company. That was the second such letter; the division had already flagged Kalshi in 2025 before agreeing to hold off. Behind those letters sits a general gambling code, codified in Title 23, chapter 5 of the Montana Code Annotated, that defines gambling broadly as risking something of value on an outcome “contingent in whole or in part upon lot, chance, or the operation of a gambling enterprise” (see MCA 23-5-112). On top of that older framework, the legislature bolted a brand-new, far more aggressive statute in 2025 — Senate Bill 555 — that criminalizes running unlicensed online gambling platforms in the state.

Against all of that, Kalshi’s answer is jurisdictional, not moral. It argues its contracts are federally regulated swaps on a designated contract market, that the Commodity Exchange Act hands the Commodity Futures Trading Commission exclusive authority over them, and that a state gambling regulator has no more business policing its order book than it does policing a wheat futures contract. Which body is right is exactly what Montana’s federal court has not yet decided. So a resident today is operating in a gap: the state says no, a federal exchange says the state cannot say no, and the judge has not spoken. Treat any platform access you have as provisional, not blessed.

Understanding the legality question means starting with the law that made national headlines for a different reason. Senate Bill 555, sponsored by Republican state Senator Vince Ricci, was pitched primarily as a crackdown on online sweepstakes casinos — the “free coin” social-casino apps that let people redeem virtual currency for cash prizes. Governor Greg Gianforte signed it on May 12, 2025, after the House passed it 88-11, and it took effect October 1, 2025. The headline that traveled furthest was that Montana had become the first state in the country to explicitly outlaw sweepstakes-style online gambling.

The reach did not stop at sweepstakes. SB 555 was drafted broadly enough to swallow “any platform, website, or application” that transmits gambling activity, accepts wagers in any form of currency and pays out in any form of currency without state approval. Contemporary coverage and the state’s own enforcement posture put online prediction markets inside that net alongside sweeps casinos. The penalties are not symbolic: operating or advertising an unlicensed online gambling platform in Montana is now a felony carrying up to 10 years in prison and fines of as much as $50,000. That is a heavier hammer than most states have even proposed against event-contract operators, and it is why Montana belongs in the “aggressive” column even though it never filed the kind of headline lawsuit New York or Arizona did.

One nuance worth keeping straight, because other sites blur it: SB 555’s sweepstakes provisions and the prediction-market question are legally distinct problems that happen to live in the same statute. A sweepstakes casino has no federal regulator claiming it. A CFTC-registered exchange does. So while SB 555 gave Montana a fresh, felony-grade tool, the tool’s edge against Kalshi depends entirely on whether federal derivatives law preempts it — the same unresolved fight playing out nationwide. Montana did not need SB 555 to consider event contracts illegal; its older gambling definitions already did that work. What SB 555 added was teeth and a clear legislative statement that the state wants unlicensed online wagering, however it is labeled, gone.

Most of the country’s prediction-market litigation follows one of two patterns — a state sues the exchange, or a state sends a cease-and-desist and the exchange sues to block it. Montana is the second kind, and the sequence matters. Back in April 2025, Montana’s Gambling Control Division agreed to a standstill: it would “not initiate any civil or criminal enforcement against Kalshi during the pendency of” the closely watched Nevada litigation, deferring “pending the outcome of the proceedings before Chief Judge Gordon in Nevada and any appeal to the Ninth Circuit.” That truce held for about a year.

It broke on April 6, 2026, when the division sent its second cease-and-desist letter declaring Kalshi’s activity illegal gambling under Montana law — even though, in Kalshi’s telling, the Nevada proceedings the standstill referenced were still very much alive. Rather than pull out, Kalshi went on offense. On Sunday, April 13, 2026, it filed suit in the U.S. District Court for the District of Montana, captioned KalshiEX LLC v. Knudsen, case number 6:26-cv-00028, naming Attorney General Austin Knudsen along with Gambling Control Division representatives and other state gaming officials. The case drew District Judge Donald W. Molloy, with Magistrate Judge John Johnston handling early matters; Johnston signed an order the same day authorizing Kalshi to file a brief up to 8,500 words in support of emergency injunctive relief. Kalshi’s roster included high-profile appellate counsel, a signal it intended to litigate this as a test case rather than settle quietly.

The complaint’s core is the argument you will see on every Kalshi page: Montana’s cease-and-desist “intrudes on the federal government’s exclusive authority to regulate derivatives trading” on CFTC-overseen exchanges, and one of Congress’s stated reasons for creating the CFTC was to spare exchanges the “chaos” of complying with a patchwork of 50 different state regimes. Montana’s position, stated plainly in the April 6 letter, is that dressing a sports wager as a financial contract does not change what it is. As of August 2, 2026, the docket shows the fight still in its early injunction phase — the standstill is dead, the merits are unbriefed to conclusion, and no ruling had issued on Kalshi’s request to block enforcement. That timing is important for readers: Kalshi filed the week it was riding wins at the Third Circuit and in Arizona, hoping momentum would carry into Montana, but a favorable ruling in Philadelphia does not bind a judge in Missoula.

Strip away the legal vocabulary and Montana’s stance is easy to read through its own gambling economics. Unlike states that opened sports betting to a dozen private apps and now argue about tax revenue, Montana kept the entire vertical inside government hands. Sports Bet Montana is run by the Montana Lottery and powered by Intralot, the vendor that has supplied the lottery’s technology since 2006 and whose renewed multiyear contract, signed in 2025, locks the arrangement in for years. There is exactly one legal sportsbook brand in the state, and the state owns it.

That structure gives Montana a motive other states do not have. When a federal exchange offers Montanans genuine at-home mobile trading on the outcome of NFL and NBA games, it is not just skirting a gambling rule — it is offering the product the state deliberately refused to allow, in the channel the state deliberately kept closed. Every dollar that moves to Kalshi or a rival is a dollar that never touches a Lottery kiosk. So Montana’s protectiveness is not abstract morality about wagering; residents can already bet on games legally. It is about who controls the channel and who collects. Reading the SB 555 crackdown and the April 6 letter through that lens, the state’s urgency makes sense: a lottery-monopoly state has more to lose from a frictionless federal alternative than a competitive market does.

For the resident, the same lens explains the appeal. If you have spent years being told the only way to place a mobile bet is to drive to a licensed tavern and confirm the slip on-site, an app that lets you trade a contract from your kitchen looks less like a loophole and more like the mobile experience 30-some other states already have. That gap — real mobile access on one side, a geofenced kiosk on the other — is the pressure that makes Montana’s version of this national story distinct.

Boil the national dispute down and it rests on a single classification with two very different consequences for Montana. If a sports event contract is a “swap” under the Commodity Exchange Act, then the CFTC owns the field and Montana’s gambling code cannot touch it. If instead the contract is just a bet wearing a financial costume, then Montana’s felony statute and its Gambling Control Division have every right to act. Courts around the country have landed on opposite sides of that line, which is why there is no clean national answer to import into Montana.

Kalshi’s Montana complaint leans on the wins it collected elsewhere — notably a Third Circuit panel that in April 2026 found the CEA preempts New Jersey’s gambling law as applied to these contracts, and an Arizona federal judge who in May 2026 issued the first district-level merits ruling holding federal law preempts state gambling statutes for CFTC-regulated markets. But Montana’s judge is not bound by either, and other courts have gone the other way, unpersuaded that Congress meant to hand a peer-to-peer sports market a federal shield the moment it registers as an exchange. A separate wrinkle even sympathetic judges have flagged nationally is that not every contract an exchange lists is necessarily a swap; a ruling could protect some categories and leave others exposed. For Montana specifically, the takeaway is that the state’s felony framework is neither obviously enforceable nor obviously dead — it is waiting on Judge Molloy and, ultimately, on appellate courts that may not finish this argument until it reaches the Supreme Court.

The mechanics are worth spelling out because they explain why operators insist this is not a sportsbook. On a prediction exchange you do not bet against a house that sets the odds and profits from the vig. You buy and sell contracts that settle at $1 if an outcome happens and $0 if it does not, and the price in between — say 63 cents — reads as the market’s implied probability, in this case roughly 63 percent. You can take the “yes” side or the “no” side, and every trade is matched against another user who wants the opposite position, with the exchange taking a fee rather than a spread. Because you own a position you can often sell before the event resolves, cashing out early if the price moves your way or cutting a loss if it moves against you — a feature a fixed-odds kiosk bet does not give you.

What a Montanan can trade, where access exists, spans well beyond sports. The menus typically cover politics and elections, economic data such as interest-rate decisions and inflation prints, cryptocurrency price levels, weather, and entertainment outcomes — plus the sports contracts that draw the most volume and the most legal heat. That breadth is part of why the operators resist the “gambling” label: a contract on a Federal Reserve rate move looks a lot more like a financial instrument than a moneyline does, even if the football contract sitting next to it is the one Montana’s regulator is fixated on.

This is where Montana readers deserve candor rather than a tidy “top five” list. Because the state treats these products as illegal gambling and SB 555 attaches felony exposure to offering them, platform availability here is genuinely in flux and secondary-source trackers openly contradict each other. Some list Kalshi as accessible in Montana; others put Montana on Kalshi’s restricted list. That inconsistency is a symptom of live litigation, not sloppy reporting — access can change between the day a page is written and the day you read it. Verify directly in each app before assuming you can fund an account, and understand that using one does not immunize you from the fact that Montana considers the activity unlawful.

The short profiles below describe how these operators are positioned nationally; treat their Montana status as provisional pending the outcome of KalshiEX LLC v. Knudsen. Several federal-model operators have simply chosen to skip Montana rather than test SB 555.

The full field is catalogued at our prediction markets hub.

The comparison that matters most to a Montanan is not Kalshi versus DraftKings — DraftKings has no sportsbook here — but a federal event exchange versus Sports Bet Montana, the only legal book in the state. The differences are stark. Sports Bet Montana is a Lottery product you access through kiosks in licensed bars, taverns, casinos and restaurants; its companion app lets you build slips and manage funds, but the wager itself must be confirmed while your phone is physically geolocated inside one of roughly 1,400 licensed retail locations. It is fixed-odds betting against the house, capped to on-premise play, run by the state, and squarely legal.

A prediction exchange inverts almost every one of those traits. It is nationwide mobile access with no requirement to set foot anywhere; it is peer-to-peer contract trading rather than betting against a bookmaker’s line; it is regulated — if it is regulated at all in Montana’s eyes — by a federal derivatives agency rather than the Montana Lottery; and its legality in the state is disputed rather than settled. For consumers the trade-off is real: the exchange offers the mobile convenience and the sell-before-settlement flexibility that Montana’s kiosk model was specifically designed to withhold, but it does so without the state licensing, the on-premise guardrails, or the legal certainty that come with the Lottery’s product. If you want the sanctioned option and how it works, start with our overview of Montana sportsbooks, and see which states run true mobile books at our guide to online sportsbook states or the broader online sportsbooks hub.

Two practical issues get lost in the legal drama, and both cut against the trader. On taxes, federal exchanges have not treated event-contract gains the way a sportsbook treats winnings. Kalshi, for instance, has not issued 1099-B forms for these contracts, and the IRS has published no formal classification saying whether the proceeds are gambling income, capital gains or something else. That ambiguity does not excuse anyone from reporting; net gains are taxable, and Montana taxes personal income, so a resident who profits still owes on it. But do not expect a clean tax document to arrive, and treat the reporting method as unsettled rather than obvious. None of this is tax advice — if the amounts are meaningful, talk to a professional who can look at your specific trades.

The lack of a regulatory backstop is starker. Sports Bet Montana operates inside a state system with a defined minimum age, licensed retailers and a regulator you can complain to. FanDuel Predicts is the notable exception on protections, voluntarily importing deposit limits and self-exclusion tools; most of the field does not. Before you weigh any of it, know Montana’s own rules through our guide to the legal gambling age.

Among its neighbors and peers, Montana is toward the hard-line end without being the loudest. It never filed the criminal information Arizona did or the blockbuster state-court petition New York did, but it armed itself with a felony statute most of those states lack, and its regulator broke a standstill to press the issue. Notably, Montana is not one of the nine states the CFTC has sued to defend federal jurisdiction — that list runs Arizona, Connecticut, Illinois, New York, New Mexico, Minnesota, Rhode Island, Wisconsin and Kentucky — so the federal agency has, at least so far, let Kalshi carry the fight here rather than intervening directly.

The single biggest reason Montana may stay frozen for a while is structural: its legislature meets only in odd-numbered years. There was no regular 2026 session, which means no chance for lawmakers to pass a licensing framework, a tax-and-regulate compromise, or a tighter ban until the next regular session in 2027. So the near-term action is entirely in the courtroom, not the capitol. Watch three things: whether Judge Molloy grants or denies Kalshi’s injunction and on what reasoning; whether the Ninth Circuit’s pending Nevada ruling creates a binding regional precedent that would reach Montana; and whether the 2027 legislature decides to license and tax these markets — as a handful of states have started to — or double down on the SB 555 prohibition. For the national frame, our overview of whether online gambling is legal tracks the moving pieces, and you can compare states through the state index or the main Montana gambling sites page.

Legal claims on this page are dated to August 2, 2026, and drawn from primary and reported sources, including:

• Montana Code Annotated, Title 23, chapter 5 (gambling), definitions at MCA 23-5-112 — mca.legmt.gov
• Senate Bill 555 (2025), Montana State Legislature and LegiScan — legiscan.com/MT/bill/SB555/2025
• KalshiEX LLC v. Knudsen, No. 6:26-cv-00028, U.S. District Court for the District of Montana — CourtListener docket 73181283
• Montana Department of Justice, Gambling Control Division — dojmt.gov
• Montana Lottery / Sports Bet Montana — montanalottery.com
• U.S. Commodity Futures Trading Commission — cftc.gov
• Reported coverage from Sportico, SBC Americas, PlayUSA, Bonus.com and Daily Montanan on SB 555 and the Kalshi litigation.

Because this area moves weekly and Montana’s case remains unresolved, verify current platform access and case status before acting.