Rhode Island Prediction Markets: The State That Runs the Sportsbook Sued Kalshi

For readers trying to place Rhode Island inside the wider map of legal and offshore GamblingSitesUSA.com coverage, this page walks through exactly what the state alleged, the specific statutes and constitutional provisions it invoked, what Kalshi and the CFTC fired back, and — the practical question a resident actually cares about — whether you can still open one of these apps in Providence today. The short version is that nothing has been decided, the apps still work, and the case that could settle it is only getting started.

The truthful version is that it is unsettled and being fought over in two courthouses at once, but as of August 2, 2026 the platforms remain reachable by Rhode Island residents. No judge has ordered Kalshi or Polymarket out of the state, no ban is on the books, and no injunction shutting them down has issued. What exists instead is a live, unresolved collision: the state says these products are illegal gambling that only the Rhode Island Lottery may offer, and the platforms plus their federal regulator say Rhode Island has no authority over them at all.

The reason the answer is so hedged traces to how the fight started and who is in it. Rhode Island’s move was not an enforcement raid but a request for a court declaration — the state asked a Superior Court judge to rule that sports-related event contracts count as “casino gaming” and “online sports wagering” under Rhode Island law, and therefore may not be offered by anyone the Lottery has not licensed. A declaratory-judgment petition does not by itself pull an app from the store. It sets up a legal test. Until that test is resolved, or until a court grants the injunction the state has asked for, the contracts keep trading. Kalshi, for its part, went to federal court seeking the opposite declaration and an order barring the state from ever enforcing its gambling laws against a federally registered exchange. So a Rhode Islander sits in an odd spot: legally contested, practically available, with the outcome depending on which sovereign a court decides gets to make the rules.

One clarification matters up front because it separates Rhode Island from states like Connecticut, Illinois and Nevada. Those states opened with cease-and-desist letters from a gaming regulator. Rhode Island’s Department of Business Regulation, which houses the state’s gaming and athletics oversight, did not issue a public cease-and-desist here. The opening salvo came from the Attorney General as a lawsuit. The regulator’s role surfaced only when Kalshi named the department’s gaming and athletics administrator as a defendant in its federal complaint — a preemptive strike against enforcement that had not yet formally happened.

To understand the intensity of Rhode Island’s reaction, you have to understand that in this state the house is, quite literally, the government. Legal gambling here runs through a structure the Attorney General’s petition describes as retaining “operational control” for the state itself. The two casinos — Bally’s Twin River in Lincoln and Bally’s Tiverton — operate under the chief regulatory authority of the State Lottery Division, known as RILOT. Casino gaming, table games and sports betting all live inside that state-run framework, and every piece of it traces back to specific votes of the Rhode Island electorate.

The sports-betting arm is where the dollars in dispute flow. After the Supreme Court struck down the federal sports-betting ban in Murphy v. National Collegiate Athletic Association, 584 U.S. 453 (2018), Rhode Island moved within a month to legalize wagering — but only inside its existing state-run system. The General Assembly authorized RILOT to “implement, operate, conduct, and control sports wagering” with “full operational control” vested in the Lottery, codified at R.I. Gen. Laws Section 42-61.2-2.4. In 2019 it extended that to online play, defining “online sports wagering” at Section 42-61.2-1(27) and channeling all of it through a single approved platform. That platform is Sportsbook Rhode Island, and since 2019 the Lottery has contracted exclusively with International Game Technology to run it. Servers must sit inside a restricted area at Twin River; geolocation must confirm the bettor is physically in Rhode Island; and under Section 42-61.2-5(a)(1), the state keeps 51 percent of all in-person and online sports-wagering revenue.

Put those pieces together and the stakes become obvious. Rhode Island does not license a dozen competing sportsbooks and tax them. It runs one book, takes the majority cut, and directs the proceeds into the general fund. The state’s own petition put a number on the erosion: sports betting has generated close to 2.8 billion dollars in state revenue since 2019, and sports-lottery wagering fell 8 percent from 2024 to 2025 — a dip the Attorney General ties directly to the rise of prediction markets pulling bettors out of the state system. When a Rhode Islander bets a moneyline on Kalshi instead of Sportsbook RI, the 51 percent the treasury would have collected simply vanishes. No other state in this national fight has that clean a line from an event contract to a hole in its own budget.

The monopoly picture is shifting slightly even as the lawsuit proceeds, which is worth noting for accuracy. In May 2026 the Lottery awarded Bally’s Corporation a tentative five-year deal to launch Rhode Island’s second online sportsbook, ending the single-app market that had run since 2019. Bally’s cannot go live before November 26, 2026, when the exclusivity window in the IGT contract closes. Even with a second operator, though, the architecture stays state-run: the Lottery remains the controlling authority, the revenue split stays statutory, and the product stays licensed. Adding a second state-approved book does nothing to legitimize an unlicensed one, which is precisely the state’s point.

May 21, 2026 produced one of the stranger sequences in this entire national saga. Both sides knew a fight was coming, and both wanted to pick the courtroom. Kalshi won the footrace. At 12:03 that afternoon, the company filed suit against Rhode Island officials in the U.S. District Court for the District of Rhode Island, seeking declaratory relief plus temporary, preliminary and permanent injunctions to stop the state from enforcing its gambling laws. Roughly four hours later, at about 4 p.m., Attorney General Peter F. Neronha filed the state’s answer to that gambit — a petition for declaratory judgment against both Kalshi and Polymarket in Providence County Superior Court.

The choice of forum was the whole game. Kalshi wanted a federal judge, because its entire theory rests on federal law overriding state law, and federal court is friendlier ground for a preemption argument. Rhode Island wanted a state judge interpreting the Rhode Island Constitution and Rhode Island statutes, because on that home turf its gambling framework is settled and its authority is strong. By filing first in federal court, Kalshi tried to anchor the dispute where it wanted it. By filing hours later in state court, Neronha refused to let the company frame the question and staked out the state’s own venue. The result is parallel litigation — one case in each system, each asking a court to declare the opposite of what the other case seeks.

The defendants tell you who Kalshi feared. Its federal complaint named Attorney General Neronha and Christina Tobiasz, the gaming and athletics administrator at the Rhode Island Department of Business Regulation — the two officials with the power to bring a gambling-enforcement action. Suing them preemptively was an attempt to freeze enforcement before it could start. On the state side, the caption is straightforward: The State of Rhode Island, by and through Attorney General Peter F. Neronha, versus KalshiEX LLC and QCX LLC, doing business as Polymarket US. That QCX entity is notable — it is the CFTC-registered exchange Polymarket acquired to build a domestic, regulated presence, and naming it signals the state understood exactly which corporate shell it was chasing.

Neronha’s filing is not a vague complaint about newfangled apps. It is a methodical walk through Rhode Island’s gambling law arguing that event contracts fit inside definitions the state has used for decades. The spine of it rests on the Rhode Island Constitution. Article 6, Section 15, in place since 1842 and amended in 1973, permits only “lotteries operated by the state,” and the state’s high court has read it to reach any “scheme or plan” combining three elements: consideration, chance and prize. Article 6, Section 22, added in 1994 and amended in 2014, goes further, requiring statewide and local voter referenda before the state expands “the types or locations of gambling.” The petition’s logic is that a sports event contract has all three elements of a wager, that no Rhode Island voter ever approved it, and that offering it therefore violates the constitution twice over.

From there the petition maps the contracts onto specific statutes. It argues the products qualify as “casino gaming” under R.I. Gen. Laws Section 42-61.2-1(2), because Rhode Island defines casino gaming to include Class III gaming and a Superior Court has already held that sports wagering is a form of Class III gaming. It argues they are “online sports wagering” under Section 42-61.2-1(27), because users place wagers on sporting events and individual player statistics over the internet through mobile apps — the exact statutory language. And it argues that offering any of this without a Lottery license or contract violates Section 42-61.3-2(b)(18), which makes it a felony to conduct a gaming operation where wagering is used without RILOT authorization. Rhode Island’s criminal code separately makes bookmaking and recording wagers a crime punishable by up to a year in prison under Section 11-19-14. The state is not asking for a novel ruling; it is asking a judge to say the old definitions already cover the new product.

Where the petition gets vivid is in showing how closely the platforms track a sportsbook. It points to a specific NBA playoff matchup — the Philadelphia 76ers against the New York Knicks on May 6, 2026 — and shows Kalshi and Polymarket offering wagers on the winning team plus individual player props, using layouts the state calls “strikingly similar” to each other. It notes that the very same moneyline, point-spread and over-under bets on that night’s games were simultaneously available through Sportsbook RI, subject to the state’s 51 percent cut and its responsible-gambling rules, while the identical wagers on Kalshi and Polymarket escaped all of it. Rhode Island had defined “sports wagering” in 2018 to expressly include exchange wagering, parlays, over-under, moneyline and pools — language the petition quotes to argue the legislature already anticipated exactly this.

The house behind the exchange

The most pointed section of the petition attacks the industry’s core defense — that a peer-to-peer exchange is fundamentally different from a bookmaker taking the other side of your bet. Rhode Island argues the difference is cosmetic. It describes Kalshi Trading LLC as an affiliated entity that functions like the house, placing both buy and sell orders to provide liquidity, absorbing imbalances in demand and profiting from price movement. It describes Kalshi Klear LLC as an in-house clearinghouse that determines outcomes, issues payouts and moves funds between bettors — all inside Kalshi’s own corporate family. Whether a court accepts that characterization is one of the case’s central questions, because if the exchange really is just a dressed-up sportsbook, the preemption argument gets much harder to sustain.

The filing also leans on design. It catalogs features it says are lifted from gambling psychology — a live ticker of other users’ bets streaming across Kalshi’s homepage, “Trending” and “Top Movers” lists, and leaderboards ranked by profit and volume on daily, weekly, monthly and all-time cycles, some with countdown clocks meant to pressure impulsive betting. It flags Kalshi app-store thumbnails that advertised the product as “legal in all 50 states,” and Polymarket marketing inviting U.S. users onto a waitlist even as the site claims to be unavailable in the United States. None of that is a statutory violation on its own, but it builds the state’s picture of products marketed as, and behaving like, gambling.

The relief the state wants

The petition’s prayer for relief asks the Superior Court to declare that event contracts are subject to Article 6, Sections 15 and 22 of the state constitution; that they constitute casino gaming under Section 42-61.2-1(2); that they constitute online sports wagering under Section 42-61.2-1(27); that both categories are restricted to operations under RILOT’s full control; and that the platforms’ Rhode Island operations are therefore unauthorized gambling. It then asks the court to permanently enjoin Kalshi and Polymarket from offering sports-related event contracts in Rhode Island and to order restitution and disgorgement of profits. That injunction is the piece that would actually change what a resident can do — and as of August 2, 2026 it has not been granted.

Kalshi’s federal complaint runs on a single engine: the Commodity Exchange Act. The company argues that its sports event contracts are federally regulated financial products traded on a designated contract market registered with the CFTC, that Congress handed the CFTC exclusive jurisdiction over such trading, and that this federal grant preempts Rhode Island’s gambling laws entirely as applied to a registered exchange. In Kalshi’s telling, a state constitution that reserves gambling to a Lottery monopoly is simply beside the point when the activity is federally supervised derivatives trading. It asked the federal court to declare Rhode Island’s gambling statutes preempted and to enjoin Neronha and the Department of Business Regulation from enforcing them against the company.

This is the same argument Kalshi has run in courtroom after courtroom, but it lands differently in each state because the results so far have split sharply. The industry’s marquee win came from the Third Circuit in April 2026, which held 2-1 in the New Jersey case that these contracts are swaps and that federal law preempts state gambling enforcement against them on a registered exchange. Yet district judges in other states have gone the opposite way, finding the contracts are not swaps at all and that state gambling authority survives. Rhode Island’s federal judge is not bound by the Third Circuit and writes on a relatively open slate within the First Circuit, which has not yet ruled on the question. That uncertainty is exactly why Kalshi wanted this case in federal court and why the state wanted its parallel case in front of a Rhode Island judge.

A private company arguing federal preemption is one thing. The federal agency itself showing up to sue a state is another, and that is what happened next. On May 28, 2026, one week after the dueling filings, the CFTC announced it was suing Rhode Island directly in the U.S. District Court for the District of Rhode Island. The agency did not merely support Kalshi from the sidelines; it filed to stop the state’s enforcement outright, framing the central question as “whether Rhode Island state officials can usurp the CFTC’s jurisdiction and enforce state gaming laws against federally regulated exchanges in connection with the listing of federally regulated event contracts.” The commission’s position is that state action would cripple its ability to approve exchanges and products and would gut federal oversight of derivatives markets.

Rhode Island was the seventh state the CFTC had sued in this campaign, following Arizona, Connecticut, Illinois, New York, Minnesota and Wisconsin, with New Mexico and Kentucky added soon after to bring the running total to nine by summer. The pattern reflects a deliberate posture the agency’s leadership adopted after its change in direction: rather than reviewing whether these sports contracts are permissible, the CFTC has chosen to defend the exchanges and challenge any state that interferes. For Rhode Island that means the small state now faces the full weight of a federal regulator arguing that its constitution and its Lottery monopoly must yield. As of August 2, 2026, the CFTC’s suit is pending alongside the two private cases, and no ruling has resolved any of them.

Behind the legal noise, the mechanics are approachable. A prediction market lets you buy and sell contracts that settle based on whether a defined event happens. Each contract is a yes-or-no proposition — will the Celtics win tonight, will a jobs report top a number, will a given candidate carry a race — and it pays one dollar if the answer resolves yes and nothing if it resolves no. The price in between, from a penny to 99 cents, is the market’s live read on the odds. A contract changing hands at 58 cents is the crowd pricing roughly a 58 percent chance.

The structural contrast with Sportsbook RI is who takes the other side. When you bet at the Rhode Island Lottery’s book, the state’s operation is your counterparty and the odds carry a built-in margin. On a prediction exchange you are matched against other traders through an order book, the way a stock market pairs buyers with sellers. You can accept a posted price or set your own and wait for a taker. You can also close a position before the event resolves, banking a gain or trimming a loss — something a settled straight bet at a sportsbook will not let you do. The exchange earns from fees rather than from beating you, at least in theory. Kalshi has published a fee of roughly 0.07 cents to 1.75 dollars per 100 contracts on most markets, while Polymarket has run world-events markets fee-free and applied a peak effective fee near 0.75 percent on sports contracts.

The practical experience for a Rhode Islander is app-first: fund an account, browse markets, buy yes or no, then hold to settlement or trade out early. The account you open is with a CFTC-registered entity governed by federal commodities rules, not by RILOT and not by the Rhode Island regulations that wrap every bet on Sportsbook RI. That distinction is not a footnote — it is the entire subject of the lawsuits. It is also why the state argues the trade is functionally a sports bet placed outside the only system Rhode Island voters ever approved.

The menus reach well past sports even though sports is what drove both the volume and the lawsuit. A Rhode Island user browsing these apps will generally find a spread of categories, with the mix shifting by platform and by week:

One Rhode Island wrinkle deserves a flag. The state bars its own licensed book from taking wagers on college games involving Rhode Island teams or played inside the state. The prediction platforms are not honoring that carve-out, because they do not consider themselves bound by Rhode Island law at all. If the state ever wins authority here, in-state collegiate contracts would be an obvious early target, the same sore spot New Jersey pressed in its own case.

The other platforms built on federal rules list event contracts and are reviewed in depth elsewhere on the site, though none is named in the Rhode Island suit and availability varies. The prediction markets hub ties the whole field together.

None of these is named in the Rhode Island suit, and availability varies platform by platform. For the fuller history of every operator, the prediction markets hub collects each review in one place.

Rhode Island is one of the few states where the alternative to a prediction market is not a competitive slate of private sportsbooks but a single government-run app. That changes the comparison in a way worth spelling out. When a Rhode Islander bets on Sportsbook RI, the operation is licensed by the state, monitored by RILOT, and returns 51 percent of its revenue to the treasury; the bettor is protected by state responsible-gambling rules, know-your-customer controls, deposit and wager limits, and access to the state’s self-exclusion tools. A prediction exchange offers none of that state-level scaffolding, because it answers to a federal commodities regulator instead.

If you want to weigh the regulated option, see our guide to Rhode Island online sportsbooks, the roundup of states with online sportsbooks, and our main online sportsbooks hub. You can survey everything legal in the state through our Rhode Island gambling sites overview, browse the full state index, or read our national take on whether online gambling is legal.

Money and safety are where an abstract jurisdiction fight becomes personal. On taxes, start with a caveat: this is general information, not tax advice. Kalshi does not file 1099-B paperwork for event-contract trades, and the IRS has published no formal classification of prediction-market gains. That leaves the treatment genuinely unsettled — gambling income, capital gains and Section 1256 commodities treatment have all been floated, and the answer may differ depending on whether a product came from an exchange directly or through a brokerage distributor. A Rhode Islander with meaningful activity should keep detailed records and consult a tax professional rather than assume any single treatment. Rhode Island also taxes resident income, so state reporting is in play no matter how the federal question shakes out.

The missing state guardrail is the exact thing Rhode Island’s petition frames as a public harm. Trade on a CFTC exchange and you step outside the state’s gambling-protection system: no access to Rhode Island’s Lottery-run self-exclusion program, no RILOT complaint desk to escalate a dispute, and none of the responsible-gambling controls the state imposes on Sportsbook RI. The petition dwells on the well-documented harms of problem gambling and on design features it says are built to encourage impulsive betting — the same features it cataloged in Kalshi’s interface. The sector’s notable counterexample is FanDuel Predicts, which voluntarily ships deposit limits, self-exclusion and behavioral-health resources; but FanDuel by design tends not to offer sports contracts in states where it holds a sportsbook, and Rhode Island’s book is state-run rather than a FanDuel property, so the picture there is unusual.

Zoom out and Rhode Island sits in the enforcement camp alongside its New England neighbors, but with its own flavor. Massachusetts pushed its fight to the state’s high court, and Connecticut opened with regulator cease-and-desist letters before the CFTC sued it too. Rhode Island skipped the cease-and-desist and went straight to a declaratory-judgment petition, distinguished by the state’s unusually direct financial stake as the operator of the very product it says the platforms are undercutting. New Jersey, by contrast, lost at the Third Circuit and handed the platforms their biggest precedent. The map is genuinely split, and Rhode Island is one more data point on the state-authority side of it.

Several developments could move things, in Rhode Island or above it:

• A Rhode Island ruling — either the Superior Court on the state’s petition or the federal court on Kalshi’s and the CFTC’s suits could act. An injunction for the state would change what residents can do; a preemption ruling for the platforms would entrench access.
• The Ninth Circuit — a consolidated Nevada appeal was argued in April 2026 and remains pending. A ruling for Nevada would create a clean circuit split and pull the Supreme Court toward the whole question.
• The New Jersey certiorari track — New Jersey’s path to the Supreme Court after its Third Circuit loss is the first realistic route to a national answer.
• The CFTC rulemaking — the agency has proposed a contract-by-contract review of which event contracts are permissible. How it defines “gaming” could reshape the ground under every state case, Rhode Island’s included.
• Federal legislation — a bill to treat these products as gambling, if it ever passed, would moot the entire dispute regardless of any court.
• Bally’s second book — once Rhode Island’s second state-approved sportsbook launches after November 26, 2026, the state will have an even larger licensed footprint to contrast against the unlicensed exchanges.

• Rhode Island Attorney General, press release, “Attorney General Neronha sues Kalshi and Polymarket for unlawfully conducting sports gambling in Rhode Island” (May 21, 2026): riag.ri.gov/press-releases
• State of Rhode Island v. KalshiEX LLC and QCX LLC d/b/a Polymarket US, Petition for Declaratory Judgment, Providence County Superior Court, C.A. No. PC-2026- (filed May 21, 2026): rhodeislandcurrent.com
• Kalshi v. Neronha and Tobiasz, U.S. District Court for the District of Rhode Island (filed May 21, 2026); docket via CourtListener: courtlistener.com
• CFTC v. Rhode Island, U.S. District Court for the District of Rhode Island (filed May 28, 2026); agency materials at cftc.gov
• R.I. Gen. Laws Sections 42-61.2-1, 42-61.2-2.4, 42-61.2-5, 42-61.3-2, 11-19-14; R.I. Const. art. 6, Sections 15 and 22.
• Rhode Island Lottery (RILOT), Sportsbook Rhode Island and online sports wagering rules: rilot.com
• Murphy v. National Collegiate Athletic Association, 584 U.S. 453 (2018): supremecourt.gov.
• Rhode Island Current, “What are the odds? Dueling lawsuits filed on prediction markets in state and federal courts” (May 21, 2026).
• CNBC, “CFTC sues Rhode Island over actions against prediction markets” (May 28, 2026).
• SBC Americas, “CFTC takes on Rhode Island in newest prediction market case” (May 29, 2026).