Is Kalshi legal in Maine?

What Maine has done about Kalshi

1. Oct. 7, 2026

   Other development

   Maine'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

Court cases

We track no case between Kalshi and Maine.

The legal backdrop in Maine

State status

No public action foundWe found no public enforcement, litigation or enacted law. Pending bills may still be listed on the state's page.

Online sports betting

Legal onlineMobile-only market (no retail) launched Nov. 3, 2023.

Federal appeals court

First CircuitAppeal pending.

Who regulates

Maine Gambling Control Unit; Maine Attorney General

Laws and bills

None specific to prediction markets

Using Kalshi in Maine

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 Maine

• 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 PredictionsNot offered
• FanDuel PredictsOffered
• UnderdogOffered
• PrizePicksOffered
• Fanatics MarketsOffered

Questions people ask

Is Kalshi legal in Maine?

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 Maine as of Oct. 22, 2026. Maine has one public action on record that names Kalshi. The latest (Oct. 7, 2026): Maine'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 Maine sued Kalshi or ordered it to stop?

Not that we have found. We have no cease-and-desist letter, state lawsuit, court order or settlement in Maine that names Kalshi, as of Oct. 21, 2026.

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

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

Is sports betting legal in Maine?

Legal online. Mobile-only market (no retail) launched Nov. 3, 2023.

Which court will decide whether Maine can regulate Kalshi?

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

Sources

1. Kalshi Help Center: Signing Up as an Individual (updated March 10, 2026)
2. Ohio et al. amicus brief, U.S. Supreme Court No. 26-299
3. Maine sports betting status