Michigan Judge Bars Kalshi Sports Bets, Threatens $500K Daily Fine

A Michigan judge has delivered a significant blow to the prediction market platform Kalshi, issuing a preliminary injunction that bans the company from offering sports-related contracts to Michigan residents. Ingham County Circuit Judge Rosemarie Aquilina signed the order on September 1, 2026, establishing a hefty $500,000 daily fine for non-compliance, according to reports from Decrypt and Crypto News.

This preliminary injunction escalates Michigan's legal battle against Kalshi, replacing a Temporary Restraining Order (TRO) from June 2026 that carried a smaller, yet still substantial, $120,000 daily penalty. The decision reinforces Michigan Attorney General Dana Nessel's assertion that Kalshi operates a "sports betting operation masquerading as an investment opportunity."

Why did Michigan target Kalshi?

Michigan Attorney General Dana Nessel filed a lawsuit against Kalshi in March 2026, alleging violations of the Michigan Lawful Sports Betting Act. Judge Aquilina found that Kalshi's operations posed "immediate and irreparable harm" to Michigan and its "most vulnerable residents." Key concerns highlighted by the judge included the platform's acceptance of 18-year-olds, circumventing Michigan's 21-and-over requirement for bettors.

Furthermore, the judge found that Kalshi sidesteps patron protections inherent in Michigan's regulatory framework for sports betting. This avoidance, she determined, undercuts crucial funding streams for schools, compulsive gambling prevention programs, and first responders, and deprives Michigan Tribes of revenue while ignoring their sovereignty. The ruling also pointed out that Kalshi gained an unfair advantage over licensed sports betting operators who adhere to Michigan's established regulatory structure.

Attorney General Dana Nessel underscored the state's position, stating, "Kalshi long attempted to pass itself off as a legitimate gaming operation in our state, and I am relieved that this order further protects Michigan residents from its predatory, unlicensed practices."

What does the injunction require Kalshi to do?

The preliminary injunction imposes strict requirements on Kalshi regarding its operations within Michigan:

• Kalshi is barred from offering, listing, executing, or settling any sports contracts for individuals located in Michigan.
• This prohibition extends to products "functionally similar" to sports betting, including moneyline, parlay, over-under, in-game, and proposition contracts.
• The platform cannot accept deposits from anyone in Michigan.
• Kalshi is forbidden from advertising through apps, push notifications, influencers, affiliates, or paid placements in Michigan.
• Account creation or funding by Michigan residents is now prohibited.
• Kalshi must utilize a third-party geolocation service provider licensed by the Michigan Gaming Control Board (MGCB) that meets MGCB geofencing specifications.
• Within three business days of the order, Kalshi must send the order to every futures commission merchant offering its sports contracts, along with contact details for Michigan's lawyers, though Kalshi will not be liable for the firms' subsequent actions.

What is the broader context of this legal action?

Michigan's action is not an isolated incident. Prediction markets like Kalshi have historically operated outside state-level sports betting and iGaming controls, avoiding state tax laws and the stringent regulatory oversight faced by licensed operators. This jurisdictional ambiguity has led to a nationwide pushback.

More than a dozen states have challenged prediction markets over sports contracts. Kalshi has faced similar legal challenges and enforcement actions in New York, Washington, Massachusetts, Kentucky, Baltimore, and Nevada. Notably, a Washington judge ordered Kalshi to drop most markets there in August 2026, and Kalshi lost its Nevada appeal on August 28, 2026, with the Ninth Circuit upholding the state's ability to apply gaming laws to its sports contracts. Baltimore and Kentucky also filed lawsuits against Kalshi and Polymarket in August and June 2026, respectively, with Baltimore's complaint naming major financial platforms like Coinbase, Robinhood, and Webull for distributing sports event contracts.

This trend highlights a growing conflict between state authorities, who view these contracts as illegal gambling, and federal regulators like the Commodity Futures Trading Commission (CFTC), which oversees Kalshi's operations and even used emergency powers to keep Kalshi trading days after the Washington ruling, as reported by The Block.

What happens next for Kalshi in Michigan?

The preliminary injunction will remain in effect until the Ingham County Circuit Court issues a final order in Michigan's lawsuit against Kalshi. The Attorney General's March 2026 lawsuit is proceeding toward that final ruling. Kalshi's defense team, which includes former acting U.S. solicitor general Neal Katyal, has yet to issue a new direct official statement specifically in response to this September 1, 2026, preliminary injunction, beyond their general stance against being "bullied by interests that care more about protecting their monopolies than their consumers," a statement made in response to the June TRO.