Michigan Prediction Markets: The State-Court Block, the $120,000-a-Day Clock, and the Federal Regulator That Told Kalshi to Ignore It

For sports, the honest answer is no, not lawfully, and a Michigan court has said so in writing. As of August 2, 2026, Kalshi’s sports event contracts are blocked in the state by a standing court order, and Michigan Attorney General Dana Nessel is actively prosecuting the company as an unlicensed gambling operation. That is a sharper posture than the murky “unsettled” status you will find in many states. Michigan did not merely raise objections or send letters — it obtained a judicial order commanding the market off, with a five-figure daily penalty attached to enforce it.

The picture is more layered once you step off the sports category. Michigan’s legal action is aimed squarely at sports-related event contracts, the products the state says are functionally identical to the sports bets its licensed operators must be licensed to take. Contracts that have nothing to do with games — markets on interest rates, election outcomes, weather, or cultural events — are not what the attorney general sued over and are not what the injunction names. So the accurate framing is narrow and specific: sports event contracts are under a court block in Michigan, while the legality of non-sports contracts has not been tested here and is not, as of this writing, the subject of any Michigan order.

Why the split? Because Michigan’s whole argument is about substance, not labels. The state contends that a contract paying out on whether the Lions cover is a sports bet no matter what it is called or which federal agency the seller points to, and that offering it to Michiganders without a Michigan license breaks state law. A federal financial regulator, the Commodity Futures Trading Commission, disagrees and says these contracts are its exclusive turf. That disagreement has not been resolved. What has been resolved, at least for now, is the practical reality on the ground: a Michigan judge has ordered the sports contracts off, and the case is heading somewhere much bigger than Lansing.

To explain why Michigan reacted the way it did, start with what Michigan has to protect. In December 2019 the Legislature passed a pair of laws — the Lawful Internet Gaming Act and the Lawful Sports Betting Act — that authorized online casino gaming and online sports wagering under the Michigan Gaming Control Board. The market went live on January 22, 2021, with online poker following a week later. Michigan tied 15 online operator platforms to its three Detroit commercial casinos and a dozen tribal casinos, and the combined online industry reported roughly $1.4 billion in gross receipts in its very first year.

The growth since launch is the part Lansing cares about. Internet gaming alone sent about $201.7 million to the state treasury in 2021, and that figure rose every single year — to $289.2 million in 2022, $354 million in 2023, $451.4 million in 2024, and $597.5 million in 2025. Online sports betting added tens of millions more on top. Those dollars are not abstractions in Michigan; a large share is earmarked by statute for the state’s School Aid Fund and the city of Detroit. Every licensed operator pays those graduated rates, holds a license, verifies that its customers are 21, and plugs into the state’s responsible-gambling machinery.

Now set a prediction-market exchange beside that. It offers Michigan residents wagers on the same games, but it holds no Michigan license, pays none of those graduated taxes, admits users at 18 rather than 21, and answers to a federal commodities agency instead of the Gaming Control Board. From Michigan’s vantage point, that is not innovation — it is a competitor that skipped the line, dodged the tax bill, and undercut the safeguards the state spent years building. A regulator that just watched its iGaming revenue clear half a billion dollars a year had every incentive to treat that as a direct assault on the model. The revenue motive is not a cynical read of Michigan’s position; it is the position, stated plainly by the state’s own officials.

Michigan’s escalation was gradual before it was sudden. The Gaming Control Board spent much of 2025 sounding alarms about sports-event contracts, and in April 2025 it went so far as to write directly to the CFTC to flag its concerns about platforms offering what it saw as unlicensed sports betting to Michigan residents. That letter did not stop anything. By late 2025 the litigation had already begun to gather: Coinbase, which distributes event contracts, filed a federal suit against Michigan in December 2025 asserting that the Commodity Exchange Act gives the CFTC exclusive authority over these products and pushes state law aside.

The decisive move came in March 2026. On March 3, Attorney General Nessel filed a civil enforcement action against Kalshi in Michigan state court, in the Ingham County Circuit Court, seeking to shut its sports contracts out of Michigan as unlawful gambling. The platforms answered within days. Polymarket filed its own federal suit on March 4 asking a court to block Michigan from enforcing its gambling laws against event contracts, and Robinhood followed on March 5 with a federal complaint of its own. The opening skirmish went Michigan’s way: on March 10, a federal court denied Polymarket’s request for a temporary restraining order, refusing to freeze the state before the fight had really started.

Kalshi’s first instinct was to change the venue. Rather than defend Nessel’s suit in a Michigan state court, the company tried to yank it into federal court, removing the case to the U.S. District Court for the Western District of Michigan on the theory that a dispute about federally regulated financial products belongs before a federal judge. Nessel fought back with a motion to remand, arguing the case was a straightforward state enforcement action over state gambling law. The court agreed with the state and sent the case back down to the Ingham County Circuit Court. That procedural win mattered more than it might sound: it kept the case in front of a state judge, applying state law, exactly where Michigan wanted it — and it set the stage for the order that followed.

On June 29, 2026, Ingham County Circuit Judge Rosemarie E. Aquilina, sitting in the 30th Judicial Circuit, granted the attorney general a temporary restraining order and preliminary injunction against Kalshi. The order was blunt. It barred the company from offering, listing, matching, executing, clearing, settling, or otherwise facilitating any sports-related event contract for Michigan users, and it directed Kalshi to hire a third-party service to geofence the state out of those markets. To give the command teeth, Aquilina attached a penalty of $120,000 for every day Kalshi failed to comply. The initial compliance deadline was set for Monday, July 13, and was later extended by 30 days, pushing the unwinding date to roughly August 12, 2026.

What the judge wrote is as important as what she ordered. Aquilina framed the harm in stark terms, finding that Michigan and its most vulnerable citizens were suffering irreparable harm from being exploited by what she called a sports betting operation masquerading as an investment opportunity. She leaned hard on the age gap — Kalshi lets 18-year-olds trade sports outcomes, while Michigan sets the floor for licensed sports betting at 21 — and on the competitive imbalance, noting that Kalshi’s refusal to comply with Michigan’s gaming rules handed it a massive and unfair advantage over the licensed casinos and sportsbooks that do comply. This was not a judge treating the question as a close call. She treated Kalshi’s product as a sportsbook wearing a costume.

The Gaming Control Board was quick to claim the win. Executive Director Henry Williams did not hedge, saying Kalshi was targeting Michigan’s most vulnerable residents with sports betting dressed up as investing and that, without intervention, the harm would keep getting worse. He added that the board’s mandate to guarantee fair and honest gaming does not stop at the border of a company’s marketing materials. For a regulator that had spent a year writing letters, the order was vindication — a court agreeing, in writing, that the label on the counterparty does not change what the transaction is.

Kalshi’s reaction was defiance rather than retreat. A company spokeswoman said Kalshi disagreed with the state and would fight, repeating the argument that runs through every one of its cases: that it is subject to exclusive federal jurisdiction and that a state court has no business ordering a federally registered exchange to do anything. That stance — keep operating, keep litigating, do not geofence unless forced — is the same posture that has drawn Kalshi contempt exposure in other states. In Michigan it set up the next collision.

Here is where Michigan turns from an ordinary enforcement story into a genuine constitutional showdown. Faced with the July compliance deadline, Kalshi indicated it might cancel or unwind certain pending sports trades belonging to Michigan customers in order to comply with Aquilina’s order. That is when the federal government stepped directly into a state court’s business. On July 15, 2026, the CFTC invoked its emergency authority under the Commodity Exchange Act and ordered Kalshi to do the opposite of what the Michigan judge had commanded: to honor all open trades with Michigan residents according to normal market practice, and not to cancel executed contracts.

The agency’s new chairman, Michael S. Selig, drew the line in language aimed straight at Lansing, stating that a state cannot force a designated contract market to violate its obligations and that federal law does not permit such an exchange to discriminate against a state’s residents. The CFTC’s reasoning was that unwinding trades that have already been executed is an unprecedented step that would damage confidence in federally regulated markets, and that a state gambling regulator has no power to force a federal exchange to break its own clearing obligations. In one stroke, the federal agency told a company to defy a state judge.

That left Kalshi, by its own description, in an impossible position — legally required to simultaneously honor and cancel the same Michigan contracts. It is hard to overstate how unusual this is. The typical prediction-market case is a one-sided fight in a single courtroom. Michigan produced something else: a live confrontation between the two sovereigns claiming authority over the same product, each with the power to punish Kalshi for obeying the other. Nessel responded by pressing the state’s case and signaling she would not let a federal agency countermand a Michigan court. The conflict is the clearest real-world illustration anywhere of the abstract legal question — who actually gets to regulate these markets — because in Michigan both answers were issued as binding orders in the same two-week window, and they pointed in opposite directions.

Amid the courtroom drama, Michigan made a quieter move that said a great deal about how seriously it takes the consumer-protection side of this. In early July 2026, the Gaming Control Board withdrew from the National Council on Problem Gambling, the leading nonprofit in the responsible-gambling world, specifically because the council had entered into a working relationship with Kalshi. From Michigan’s perspective, an organization dedicated to protecting problem gamblers had no business partnering with a company the state was in court calling an unlicensed, under-age-gated betting operation. Rather than stay quiet, the board severed the tie publicly.

The gesture is worth pausing on because it reframes what Michigan says the fight is about. This is not just a turf war over tax dollars, though the tax dollars are real. It is also a claim that prediction markets undercut the very safety net the state built around gambling — the deposit limits, the self-exclusion registry, the addiction resources, the 21-and-up rule — and that any institution lending those markets legitimacy is working against the state’s harm-reduction mission. When a gaming regulator resigns from the national problem-gambling body over a single operator, it is drawing a hard line about which side of the consumer-protection question these platforms fall on.

Kalshi is the defendant named in the state’s marquee case, but it is not the only company in Michigan’s crosshairs, and the multi-front shape of the litigation is part of what makes the state distinctive. Where New Jersey’s fight ran almost entirely through Kalshi, Michigan drew several of the biggest names in the space into court at once, and it did so on both sides of the state-federal line.

Polymarket, the high-volume exchange that spent years offshore before confirming a formal U.S. reentry in 2026, went on offense here early. Its March 4 federal suit sought to stop Michigan from enforcing its gambling laws against event contracts, and its request for immediate relief was turned down within a week when the federal court denied its TRO. Robinhood, which distributes event contracts including Kalshi’s through its Robinhood Derivatives arm, filed its own Michigan suit on March 5, taking the preemptive-litigation route it has used against other states rather than waiting to be sued. Coinbase, another distributor of these products, had already opened its federal challenge back in December 2025. Michigan, in other words, is not defending one lawsuit — it is managing a cluster of them, some brought by the state and some brought against it, all circling the same question.

The practical upshot for a resident is that the legal cloud over Michigan is broad, not narrow. This is not a lone company testing the water; it is much of the industry litigating Michigan simultaneously, which is a sign of how much both sides think is riding on how a large, successful iGaming state resolves the question.

Because this is a blocked-sports state rather than an open one, the honest accounting matters more than a list of star ratings, and this is a place where we will not pretend availability is something it is not. As of August 2, 2026, the plain situation is this: Kalshi’s sports event contracts are under a Michigan court order to geofence the state, and the company’s on-the-ground behavior is caught between that order and the CFTC’s contrary directive, which makes day-to-day sports access here genuinely uncertain and legally contested. A Michigan resident should assume sports contracts are blocked or in the process of being blocked, and should not treat any lingering access as a settled green light.

The non-sports side is different, and worth stating precisely so no one over- or under-reads it. Michigan’s order names sports-related event contracts. Markets on economics, politics, weather, crypto price levels, and culture are not the subject of the injunction and are not what Nessel sued over, so contracts in those categories are not blocked by the Michigan order. Whether any given platform keeps its full non-sports catalog available to Michigan users is an operator-by-operator question that changes without notice, and some companies geofence an entire state rather than sort contract by contract. The only reliable way to know what is live is to check inside the app.

Given all that, we are not going to hand out a ranked buyer’s guide of sports platforms for a state where the flagship product is under a court block. What follows instead is an honest map of who the major operators in the Michigan story are and what their status is, with each linked to our full review for the deeper dive — for information only, not as a prompt to sign up for a product an injunction has named.

Others we cover under the same federal framework each gate Michigan differently, and several restrict or exclude the state on their own. Treat every one as a check-the-app situation, and see our prediction markets hub for the full roster.

Understanding the mechanics helps explain why Michigan is unconvinced by the “it is a financial product” defense. A prediction market lists a question with a yes-or-no answer — will a team win, will a number land above a line — and lets you buy a share of either side. Prices sit between one cent and 99 cents, and the price doubles as the market’s estimate of the odds, so a contract trading at 58 cents is the crowd pricing the event at roughly 58 percent. Hold a winning contract to settlement and it pays a full dollar; hold a losing one and it pays nothing. Your profit or loss is the distance between what you paid and where it lands.

The design detail the platforms emphasize is the counterparty. At a licensed Michigan sportsbook, the house sets the line and takes the other side of your bet — it profits when you lose. On an exchange-style prediction market, you are matched against another trader who took the opposite view, with the platform running the order book and collecting a fee rather than booking your action against itself. You can also sell a position before the event resolves to lock in a gain or cut a loss, which a standard straight bet does not allow. That peer-to-peer, tradeable structure is the whole basis for calling these financial instruments instead of wagers.

Michigan’s judge and regulator looked at that structure and saw a distinction without a difference for the person placing the trade. To a Michigander staking money on whether the Pistons win and collecting if they do, whether the counterparty is a bookmaker or another trader changes little about the experience or the risk. That is the crux of the state’s case: the plumbing may be novel, but the product a resident interacts with is a bet on a game, and Michigan licenses, taxes, and age-gates bets on games.

The catalog on these platforms ranges far beyond sports, and knowing the categories clarifies exactly where Michigan’s objection begins and ends.

Michigan’s line is drawn at the first category and essentially nowhere else. The attorney general’s complaint and Judge Aquilina’s order are about sports, because sports is where the product overlaps a market Michigan already licenses and protects. The state has not moved against contracts on the Federal Reserve or on an election, and the further a contract sits from a scoreboard, the further it sits from the thing Michigan is trying to stamp out. That narrowing — from a blanket fight over all event contracts toward a targeted fight over sports specifically — mirrors where the national litigation is drifting, as even judges sympathetic to the platforms have questioned whether every contract on the menu really qualifies as a federally regulated swap.

Michigan is emphatically not a state where a prediction market is the only way to bet on a game — it may be the single best regulated online-gambling market in the Midwest. A resident who wants to wager on sports has a fully licensed alternative with none of the legal fog: mobile sportsbooks that launched in January 2021, operate under Gaming Control Board oversight, verify that customers are 21, pay the state’s 8.4 percent sports-betting tax, and plug into Michigan’s self-exclusion and responsible-gambling systems. Alongside them sits a licensed online casino industry that is among the largest in the country. Both are unambiguously legal, state-supervised, and accountable to a Michigan regulator you can actually complain to.

The contrasts that matter to a resident are concrete. A licensed Michigan sportsbook is your counterparty and sets the odds; a prediction exchange matches you against other traders and charges a fee. A sportsbook holds a Michigan license, pays Michigan taxes that fund schools and Detroit, and answers to the Gaming Control Board when something goes wrong; a CFTC-registered exchange sits outside that entire system. A sportsbook checks that you are 21; an exchange commonly admits users at 18. And a sportsbook enrolls you in Michigan’s statewide self-exclusion program, while an exchange, in most cases, does not. For the large majority of Michigan residents, the licensed, state-backed path is simply the safer and clearer one — and it is the one the state itself is fighting to protect.

Two practical points sit underneath the legal theater, and both hit residents directly. On taxes — and this is general information, not tax advice — the treatment of prediction-market gains is genuinely unsettled. Kalshi does not furnish a 1099-B for its event contracts, the IRS has published no formal classification, and professionals disagree over whether winnings are gambling income, ordinary income, capital gains, or something governed by the Section 1256 rules for certain commodities. A product routed through a broker may be reported differently from one traded on a native exchange, so the answer can vary by platform. Michigan taxes its residents’ income as well, so state reporting is in play on top of the federal question. Anyone with meaningful activity should keep detailed records and consult a professional rather than assume a tidy form will arrive.

The thin consumer safeguard is the part Michigan’s regulator cares about most, and it is real. Trading on a CFTC-registered exchange puts you outside the safety net Michigan built for gambling. There is generally no access to the state’s self-exclusion registry, no Gaming Control Board complaint desk to escalate a dispute to, and a minimum age that commonly sits at 18 rather than the 21 Michigan requires for licensed betting — the exact gap Judge Aquilina highlighted. Those omissions are the same ones the board cited when it walked away from the national problem-gambling council. The sector’s notable exception is FanDuel Predicts, which voluntarily builds in deposit limits, self-exclusion, and behavioral-health referrals; but because Michigan already has a legal FanDuel sportsbook, the most consumer-protective product in the space is the one Michiganders are least likely to reach for sports in the first place.

Michigan sits in the aggressive-enforcement camp, but its case has a signature none of the others quite share.

What Michigan added to the national picture is the head-on collision between a state court and the CFTC. Other states litigated the jurisdictional question in briefs and appeals; Michigan lived it, with Judge Aquilina and Chairman Selig issuing contradictory commands to the same company within two weeks. That makes Michigan the cleanest example of why this dispute cannot stay in the lower courts forever — eventually someone has to decide which order wins.

• Michigan Attorney General, “AG Nessel Secures Order Temporarily Halting Unlawful Kalshi Michigan Operations” (June 29, 2026): michigan.gov/ag
• Order Granting Temporary Restraining Order, Michigan v. KalshiEX, Circuit Court for the 30th Judicial Circuit, Ingham County (Judge Rosemarie E. Aquilina, June 29, 2026): michigan.gov/ag
• Michigan Gaming Control Board, “MGCB reacts to temporary restraining order against KalshiEX” (June 30, 2026): michigan.gov/mgcb
• Commodity Futures Trading Commission — emergency directive and event-contract posture (July 15, 2026): cftc.gov
• Michigan v. KalshiEX docket materials trackable via CourtListener: courtlistener.com
• Michigan Gaming Control Board — internet gaming and sports betting revenue reports and operator list: michigan.gov/mgcb
• Lawful Internet Gaming Act and Lawful Sports Betting Act (2019), MCL chapter 432, via the Michigan Legislature: legislature.mi.gov
• Reporting: The Detroit News, CBS Detroit, Axios Detroit, Michigan Advance, Bloomberg Law, and CNN Politics coverage of the Michigan-Kalshi dispute (June–July 2026).

The legal picture changes almost weekly. The dates and case postures on this page are current to August 2, 2026; confirm the latest status of the Michigan injunction, the CFTC conflict, and the merits case before acting on anything here.