Montana gambling law changes https://gamblingatlas.org/states/montana/ New laws, launches, tax changes and enacted bills on gambling in Montana. en-us Mon, 12 Oct 2026 12:00:00 GMT Division rules Kalshi's event contracts are illegal gambling and threatens criminal charges; Kalshi sues in federal court https://gamblingatlas.org/states/montana/#timeline event:MT:2026-04-06:Division rules Kalshi's event contracts are illegal gambling Mon, 06 Apr 2026 12:00:00 GMT SB 555's expanded internet-gambling ban takes effect https://gamblingatlas.org/states/montana/#timeline event:MT:2025-10-01:SB 555's expanded internet-gambling ban takes effect Wed, 01 Oct 2025 12:00:00 GMT Gov. Gianforte signs SB 555, banning online casinos and dual-currency sweepstakes platforms under the internet-gambling law https://gamblingatlas.org/states/montana/#timeline event:MT:2025-05-23:Gov. Gianforte signs SB 555, banning online casinos and dual Fri, 23 May 2025 12:00:00 GMT Gambling Control Division sends Kalshi a cease-and-desist letter https://gamblingatlas.org/states/montana/#timeline event:MT:2025-03:Gambling Control Division sends Kalshi a cease-and-desist le Sat, 01 Mar 2025 12:00:00 GMT Sports Bet Montana launches with GeoComply on-premises geofencing and Intralot technology https://gamblingatlas.org/states/montana/#timeline event:MT:2020-05:Sports Bet Montana launches with GeoComply on-premises geofe Fri, 01 May 2020 12:00:00 GMT Gov. Steve Bullock signs HB 725, making Montana Lottery the sole sports-wagering operator, effective immediately https://gamblingatlas.org/states/montana/#timeline event:MT:2019-05-03:Gov. Steve Bullock signs HB 725, making Montana Lottery the Fri, 03 May 2019 12:00:00 GMT Ch. 284, L. 2019 Montana Lottery sells its first ticket https://gamblingatlas.org/states/montana/#timeline event:MT:1987-06-24:Montana Lottery sells its first ticket Wed, 24 Jun 1987 12:00:00 GMT Video Gambling Machine Control Law enacted, setting the 15% VGM tax https://gamblingatlas.org/states/montana/#timeline event:MT:1987:Video Gambling Machine Control Law enacted, setting the 15% Thu, 01 Jan 1987 12:00:00 GMT Ch. 603, L. 1987 Voters approve Legislative Referendum 100, creating the Montana Lottery https://gamblingatlas.org/states/montana/#timeline event:MT:1986-11-04:Voters approve Legislative Referendum 100, creating the Mont Tue, 04 Nov 1986 12:00:00 GMT