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 Massachusetts as of Oct. 22, 2026. A January 2026 state-court injunction against Kalshi's sports contracts in Massachusetts was put on hold pending appeal in February 2026. CBS Sports reported on October 21, 2026 that Kalshi still awaits a Supreme Judicial Court ruling. A Gambling.com headline from August 25, 2026 said the ban was in force, so current status is conflicting.
Massachusetts has 9 public actions on record that name Kalshi. The latest (Oct. 7, 2026): Massachusetts'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 Massachusetts go to the First Circuit, where an appeal on the question is pending.
Is Kalshi Legal in Massachusetts?, Prediction Market Laws (last updated Oct. 22, 2026), https://predictionmarketlaws.com/platforms/kalshi/massachusetts.
APA
Prediction Market Laws. (2026, October 22). Is Kalshi Legal in Massachusetts?. https://predictionmarketlaws.com/platforms/kalshi/massachusetts
What Massachusetts has done about Kalshi
Other development
Massachusetts'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).
The Supreme Judicial Court heard argument on Kalshi's appeal (SJC-13906); reports described the justices as skeptical of Kalshi. No decision had been reported as of Oct. 19, 2026.
The Supreme Judicial Court moved the appeal to its own docket (SJC-13906), invited amicus briefs on federal preemption and set an expedited briefing schedule; the stay stayed in place.
Appeals Court Justice Sabita Singh (No. 2026-J-0143) granted Kalshi's motion to stay the injunction pending appeal, without expressing a view on the merits, and expedited the appeal.
Judge Barry-Smith entered the injunction and denied Kalshi's emergency motion to stay it, allowing 30 days for compliance so Kalshi could seek a stay from the Appeals Court.
Suffolk Superior Court granted the attorney general's preliminary injunction barring Kalshi from offering sports event contracts in Massachusetts without a state license.
Massachusetts Gaming Commission; Massachusetts Attorney General
Laws and bills
None specific to prediction markets
Using Kalshi in Massachusetts
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.
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 Massachusetts as of Oct. 22, 2026. A January 2026 state-court injunction against Kalshi's sports contracts in Massachusetts was put on hold pending appeal in February 2026. CBS Sports reported on October 21, 2026 that Kalshi still awaits a Supreme Judicial Court ruling. A Gambling.com headline from August 25, 2026 said the ban was in force, so current status is conflicting. Massachusetts has 9 public actions on record that name Kalshi. The latest (Oct. 7, 2026): Massachusetts'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 Massachusetts sued Kalshi or ordered it to stop?
Yes. Feb. 17, 2026: Appeals Court Justice Sabita Singh (No. 2026-J-0143) granted Kalshi's motion to stay the injunction pending appeal, without expressing a view on the merits, and expedited the appeal. Feb. 6, 2026: Judge Barry-Smith entered the injunction and denied Kalshi's emergency motion to stay it, allowing 30 days for compliance so Kalshi could seek a stay from the Appeals Court. Jan. 20, 2026: Suffolk Superior Court granted the attorney general's preliminary injunction barring Kalshi from offering sports event contracts in Massachusetts without a state license. Oct. 28, 2025: Judge Richard Stearns of the District of Massachusetts (No. 1:25-cv-12595) remanded the case to state court after Kalshi tried to remove it. Sept. 12, 2025: The attorney general sued Kalshi in Suffolk Superior Court, alleging it offers sports wagering in Massachusetts without a license.
How old do you have to be to use Kalshi in Massachusetts?
18. That is Kalshi's minimum age, and it lists no different rule for Massachusetts.
Is sports betting legal in Massachusetts?
Legal online. Retail and mobile sports betting; mobile launched March 10, 2023.
Which court will decide whether Massachusetts can regulate Kalshi?
Federal appeals from Massachusetts 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.