Has Missouri sued Kalshi or ordered it to stop?

Yes. Sept. 16, 2026: The attorney general demanded each operator stop offering sports contracts to people in Missouri, or obtain a Gaming Commission license, pay the 10% wagering tax and fees, and bar under-21 users, within 30 days; the letters were announced Sept. 18, 2026.

How old do you have to be to use Kalshi in Missouri?

18. That is Kalshi's minimum age, and it lists no different rule for Missouri.

Is sports betting legal in Missouri?

Legal online. Retail and mobile sports betting; the market launched Dec. 1, 2025 after 2024 voter approval.

Which court will decide whether Missouri can regulate Kalshi?

Federal appeals from Missouri go to the Eighth Circuit, where an appeal on the question is pending. 3 petitions now ask the U.S. Supreme Court to settle the question nationally.

MO · Kalshi · Checked Oct. 21, 2026

Is Kalshi legal in Missouri?

No restriction found Missouri: In litigation

The short answer

Kalshi does not publish a list of states where it is unavailable, and we found no court order, regulator action or Kalshi notice that stops it from serving Missouri as of Oct. 22, 2026.

Missouri has 2 public actions on record that name Kalshi. The latest (Oct. 7, 2026): Missouri's attorney general signed an Ohio-led amicus brief, joined by 38 other states and DC, asking the U.S. Supreme Court to grant New Jersey's petition in Flaherty v. KalshiEX (No. 26-299).

Federal appeals from Missouri go to the Eighth Circuit, where an appeal on the question is pending.

Availability: Kalshi Help Center: Signing Up as an Individual (updated March 10, 2026), checked Oct. 22, 2026. A summary of public actions, not legal advice.

Follow Missouri

Cite this page

Bluebook

Is Kalshi Legal in Missouri?, Prediction Market Laws (last updated Oct. 22, 2026), https://predictionmarketlaws.com/platforms/kalshi/missouri.

APA

Prediction Market Laws. (2026, October 22). Is Kalshi Legal in Missouri?. https://predictionmarketlaws.com/platforms/kalshi/missouri

What Missouri has done about Kalshi

Oct. 7, 2026
Other development
Missouri's attorney general signed an Ohio-led amicus brief, joined by 38 other states and DC, asking the U.S. Supreme Court to grant New Jersey's petition in Flaherty v. KalshiEX (No. 26-299).
Source: Ohio et al. amicus brief, U.S. Supreme Court No. 26-299
Sept. 16, 2026
Cease-and-desist
The attorney general demanded each operator stop offering sports contracts to people in Missouri, or obtain a Gaming Commission license, pay the 10% wagering tax and fees, and bar under-21 users, within 30 days; the letters were announced Sept. 18, 2026.
Source: Missouri Attorney General letter to KalshiEX LLC

All 5 actions in Missouri

Court cases

We track no case between Kalshi and Missouri.

The legal backdrop in Missouri

State status: In litigationThe state and a prediction market operator are actively in court, and no order blocking the operator is in force.
Online sports betting: Legal onlineRetail and mobile sports betting; the market launched Dec. 1, 2025 after 2024 voter approval.
Federal appeals court: Eighth CircuitAppeal pending.
Who regulates: Missouri Gaming Commission; Missouri Attorney General
Laws and bills: None specific to prediction markets

Using Kalshi in Missouri

Minimum age: 18
Identity checks: Kalshi requires legal name, date of birth and a residential address (no commercial addresses or PO boxes) that match a government ID. It asks for a live in-app photo of a driver's license or passport. It may also ask for proof of address, employment information or source of funds. It may request a Social Security number at any point after signup, which it uses for identity verification and tax reporting; an SSN is not required to deposit. (Help articles updated June 30 and August 25, 2026.) Source
Tax forms: Kalshi says users who meet IRS reporting thresholds get Form 1099-INT (interest), 1099-MISC (credits and rewards), 1099-B (proceeds from crypto transfers) and 1099-DA (digital asset reporting from ZeroHash). The forms appear under Tax Info in the Account tab, and some are emailed through Zenwork. Kalshi gives no dollar thresholds or issue dates. Trading profit-and-loss statements are in the documents tab (help article updated June 22, 2026). SourceWhat the platform says it reports; not tax advice.

Other platforms in Missouri

KalshiNo restriction found
Polymarket USNo restriction found
Gemini PredictionsNo restriction found
RobinhoodNo restriction found
Crypto.comNo restriction found
CoinbaseNo restriction found
WebullNo restriction found
DraftKings PredictionsSports blocked
FanDuel PredictsSports blocked
UnderdogOffered
PrizePicksSports blocked
Fanatics MarketsNot offered

Questions people ask

Is Kalshi legal in Missouri?: Kalshi does not publish a list of states where it is unavailable, and we found no court order, regulator action or Kalshi notice that stops it from serving Missouri as of Oct. 22, 2026. Missouri has 2 public actions on record that name Kalshi. The latest (Oct. 7, 2026): Missouri's attorney general signed an Ohio-led amicus brief, joined by 38 other states and DC, asking the U.S. Supreme Court to grant New Jersey's petition in Flaherty v. KalshiEX (No. 26-299). This summarises public actions; it is not legal advice.
Has Missouri sued Kalshi or ordered it to stop?: Yes. Sept. 16, 2026: The attorney general demanded each operator stop offering sports contracts to people in Missouri, or obtain a Gaming Commission license, pay the 10% wagering tax and fees, and bar under-21 users, within 30 days; the letters were announced Sept. 18, 2026.
How old do you have to be to use Kalshi in Missouri?: 18. That is Kalshi's minimum age, and it lists no different rule for Missouri.
Is sports betting legal in Missouri?: Legal online. Retail and mobile sports betting; the market launched Dec. 1, 2025 after 2024 voter approval.
Which court will decide whether Missouri can regulate Kalshi?: Federal appeals from Missouri go to the Eighth Circuit, where an appeal on the question is pending. 3 petitions now ask the U.S. Supreme Court to settle the question nationally.