Are Prediction Markets Legal in Michigan?

Last updated September 27, 2026. Snapshot — not legal advice.

As of September 27, 2026, Michigan has a restriction on prediction-market platforms currently in effect.

Prediction markets in Michigan

Restriction in effect (preliminary injunction)

Michigan has turned back every platform that has challenged it. Three CFTC-regulated venues and brokers sued the Attorney General and the Gaming Control Board pre-emptively and lost their injunction motions: Polymarket US and Robinhood Derivatives in June 2026, and Coinbase Financial Markets in August. All three are on appeal to the Sixth Circuit, which on September 25 rejected the same preemption theory in Kalshi’s Ohio and Tennessee appeals, in a published decision that binds those panels. Robinhood (September 4) and Coinbase (September 23) have since agreed in court-approved stipulations to stop offering sports contracts in Michigan while their appeals run. Kalshi arrived the other way round — the state sued it in Ingham County (Nessel v. KalshiEX), and on September 1, 2026 the court turned its June restraining order into a preliminary injunction barring Kalshi’s sports contracts in Michigan, with a $500,000-a-day penalty for failing licensed geolocation and notice to every broker that offers them.

Litigation affecting Michigan

Nessel v. KalshiEX LLCJudge Aquilina converted the June TRO into a preliminary injunction on September 1, 2026, barring Kalshi’s sports contracts in Michigan with a $500,000-a-day geolocation penalty and notice to every broker that offers them.

Preliminary injunction in effect

QCX, LLC (d/b/a Polymarket US) v. NesselJudge Maloney denied Polymarket US a preliminary injunction (June 2026), holding sports event contracts are not swaps under the Commodity Exchange Act.

Injunction denied; on appeal (6th Cir.)

Robinhood Derivatives, LLC v. NesselJudge Maloney denied Robinhood Derivatives a preliminary injunction (June 2026) in an opinion issued alongside the Polymarket US denial.

Injunction denied; on appeal (6th Cir.)

Coinbase Financial Markets, Inc. v. NesselJudge Kumar denied Coinbase Financial Markets a preliminary injunction (August 2026), completing a four-for-four sweep for Michigan across two federal districts.

Injunction denied; on appeal (6th Cir.)

Which platforms are available in Michigan?

Each platform’s own published availability list, checked September 24, 2026. This table covers the platforms whose complete list we could verify from a primary source: Kalshi, Polymarket (international), DKeX (DraftKings Predictions), Underdog (Underdog Predict), Novig.

Platform availability in Michigan
Platform	Status in Michigan	Source
Kalshi	Offered, with sports restricted	Court order · Case
Polymarket (international)	Unavailable here	Platform’s list
DKeX (DraftKings Predictions)	Financial markets only	Platform’s list (archived Sep 16)
Underdog (Underdog Predict)	Unavailable here	Platform’s list
Novig	Unavailable here	Platform’s list

Sports betting & gambling in Michigan

Legal — Online & Retail

Legalized December 2019; retail March 2020, online January 2021 The market is regulated by the Michigan Gaming Control Board. Tribal gaming: Significant (numerous tribal operators statewide).

The federal-vs-state fight

Every entry in this fight turns on the same question: does a prediction-market platform's federal regulation by the CFTC preempt a state's gambling law, or does the state retain authority to restrict it? Courts around the country are answering that question differently — sometimes for the platform, sometimes for the state — and almost every ruling so far is preliminary and under appeal. Treat this page as a snapshot, not a final word.

This page is informational, not legal advice. Nearly every litigation entry referenced here is a preliminary ruling under appeal. Always verify a platform's current, location-specific eligibility directly with the venue before relying on this page.