Is online gambling legal in Montana?

Winnings are subject to the state's graduated income tax at 4.7% to 5.65%, and 24% federal withholding applies on wins over $5,000. If a problem is not resolved, you can file a formal complaint with the Montana Lottery.

Only what is listed as legal above is licensed. Anything else offered to you online is unlicensed and gives you no protection.

Online sports betting is only partly legal in Montana (partial). Online casino is banned in Montana. Online poker is banned in Montana. The lottery is legal on sites licensed in Montana.

The minimum age on record for gambling in Montana is 18+.

24% federal withholding on wins over $5,000. Gambling winnings are subject to the state's graduated income tax, with rates from 4.7% to 5.65%.

Always verify a casino holds a valid Montana Lottery (Sports Betting); Gambling Control Division, Dept. of Justice (Other Gambling) licence before depositing.

If a site isn't on the regulator's licensee register, ask the regulator before you play: an unlisted site is usually not licensed here (a register can lag behind a new licence). An unlicensed site is outside the regulator's supervision, so you cannot complain to the regulator about it.

1. 1

   1. Contact the Retailer or Sports Bet Montana

   For issues with wagers or payouts, the first step is to resolve the dispute directly with the licensed retail location where the bet was placed or through the customer support channels for the Sports Bet Montana app.

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   2. Escalate to the Montana Lottery

   If the issue cannot be resolved directly, players can file a formal complaint with the Montana Lottery, which is the ultimate regulator for all sports wagering activity in the state.

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   3. Escalate to the Gambling Control Division (Non-Sports Betting)

   For disputes related to Video Gambling Machines or live card games, players should file a complaint with the Department of Justice's Gambling Control Division, which regulates these verticals.

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  Look for the Official "Sports Bet Montana" Brand

  The only legal way to bet on sports is through the state-run "Sports Bet Montana" platform, either on the official app or a retail kiosk. Any other brand claiming to be legal in Montana is an illegal offshore operator.

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  Verify You Are Inside a Licensed Lottery Retailer

  Legal mobile betting only works inside an authorized location. These are typically bars, taverns, and casinos with a valid Montana Lottery retailer license. If you can place a bet from home, the site is illegal.

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  Check for a DOJ Permit on Video Machines

  Every legal Video Gambling Machine must have a permit decal from the Montana Department of Justice's Gambling Control Division clearly displayed. Absence of this permit is a major red flag.

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  Never Deposit with Cryptocurrency

  Licensed gambling in Montana is strictly fiat-based. Any site that accepts Bitcoin or other cryptocurrencies is an unregulated, illegal offshore platform and was explicitly targeted by 2025 legislation (SB 555).

• Myth

  I can use the Sports Bet Montana app to bet from my couch.
  Reality

  False. While you can manage your account from anywhere, state law requires you to be physically inside a licensed lottery retail location (like a bar or casino) to place any wager. The app uses geolocation to block bets placed outside these venues.

• Myth

  Since sports betting is legal, online poker and casino sites are probably fine too.
  Reality

  False. Montana has one of the strictest laws in the US and has explicitly made online casino and poker participation illegal since 2005. A 2025 law (SB 555) made operating such a site a felony, which shows the state's aggressive enforcement stance.

• Myth

  Sweepstakes casinos are a legal way to play online slots.
  Reality

  False. As of October 1, 2025, Montana became the first state to pass a law specifically banning sweepstakes casinos, which closed this perceived loophole entirely. Participating in or operating such games is illegal.

All advertising for sports betting is controlled by the state monopoly, the Montana Lottery. No competitive pressures drive promotional offers. Rules for Video Gambling Machines are much stricter and explicitly ban any reference to "slot machines."