Missouri Amendment 2 legalized sports betting statewide by adding Section 39(g) to Article III of the state constitution, and regulated wagering launched on December 1, 2025. If you are at least 21 and physically inside Missouri, you can now place bets through licensed mobile apps, at retail sportsbooks inside the state’s riverboat casinos, or at betting windows inside professional sports stadium districts. The Missouri Gaming Commission oversees the whole system, and winnings are taxable income.
What Amendment 2 Actually Did
The amendment did not create a new article of the constitution. It added subsection 39(g) to the existing gambling section, expanding a framework that already covered the state’s excursion gambling boats.1Missouri Revisor of Statutes. Missouri Constitution Article III Section 39(g) The language calls for a “well-regulated sports wagering industry” that generates tax revenue for Missouri schools, and it hands the rulemaking and enforcement job to the Missouri Gaming Commission.
Because sports betting sits in the constitution rather than in ordinary state law, the legislature cannot repeal or substantially change it without another statewide vote. That cuts both ways: the framework is locked in, but so are its weaknesses.
Where and How You Can Place a Bet
There are three legal channels.
Mobile apps and websites from licensed operators are the most accessible. You do not need to be a Missouri resident, but you must be standing inside Missouri when you place the wager. Every platform runs a location check when you log in and again at least every 30 minutes while you are active, and it must detect and block VPNs or other spoofing tools.2Secretary of State. Missouri Code of State Regulations 11 CSR 45-20 – Sports Wagering
Retail sportsbooks operate in person inside the state’s excursion gambling boats. Professional sports stadiums can also host betting, but only inside a “sports district” defined as the venue plus the area within 400 yards of it.1Missouri Revisor of Statutes. Missouri Constitution Article III Section 39(g) Walk a few blocks past the parking lot and you are back to mobile-only territory.
Who Can Bet and What Bets Are Off-Limits
You must be 21 or older. Mobile operators verify your age and identity with personal information and a government-issued ID before you can fund an account or place a wager.1Missouri Revisor of Statutes. Missouri Constitution Article III Section 39(g)
Some bets are prohibited outright:
- Any wager on youth or high school events involving minors.
- Individual player propositions on games involving Missouri college teams. You can bet the outcome of the game itself, but not on how many points a specific player will score or hit other personal statistical marks.
- Traditional fantasy sports contests are governed separately and do not fall under the sports wagering rules.
Everything else that a licensed sportsbook offers is fair game: point spreads, moneylines, totals, parlays, and in-game props on professional and non-Missouri college events.
How Your Winnings Are Taxed
Sports betting winnings are taxable income at both the federal and state level, whether or not you receive a tax form.
Federally, operators must issue a Form W-2G when payouts hit certain thresholds. For 2026, the reporting threshold for most gambling payouts is $2,000, and it adjusts for inflation in later years.3Internal Revenue Service. Instructions for Forms W-2G and 5754 Not getting a W-2G does not make smaller winnings tax-free; it only means no one filed a form on your behalf.
You can deduct gambling losses, but the rules are narrow. You have to itemize on Schedule A, and your loss deduction cannot exceed the gambling income you report. Losses do not create a net deduction, and they do not carry forward to another year. The IRS expects you to keep detailed records of every bet: date, type, amount wagered, and result. Account statements, app transaction histories, and receipts all qualify as documentation.4Internal Revenue Service. Gambling Income and Losses
A practical example. If you win $3,000 and lose $4,000 over a year, you still owe tax on the $3,000 in winnings. Itemize and you can offset the full $3,000 with losses, but the extra $1,000 disappears. Take the standard deduction instead and you cannot deduct any losses at all, so the full $3,000 remains taxable.
The 10% Operator Tax and School Funding
Licensed operators pay a 10% tax on adjusted gross revenue, which is total wagers minus payouts to winners, promotional credits, voided bets, and federal excise taxes.1Missouri Revisor of Statutes. Missouri Constitution Article III Section 39(g) The promotional credit deduction is uncapped, which means the “free bet” offers operators use to attract customers reduce the taxable base without limit.
The tax money flows in a specific order. First, the Gaming Commission reimburses itself for the cost of regulating sports betting. Second, at least the greater of 10% of annual tax revenue or $5 million goes to the Compulsive Gaming Prevention Fund. Only what remains after those two obligations flows to elementary, secondary, and higher education.1Missouri Revisor of Statutes. Missouri Constitution Article III Section 39(g) Fiscal analysts estimated the amendment would generate somewhere between $0 and $28.9 million annually for schools, a range wide enough to signal real uncertainty about what will actually reach classrooms.
Self-Exclusion and Problem Gambling Help
Missouri runs a statewide self-exclusion program through the Gaming Commission. If you feel you cannot control your gambling, you can voluntarily add yourself to the list. Enrollment is lifetime, though you can apply for removal after five years.5Missouri Gaming Commission. How Do I Get on the Problem Gambling List
You can apply online through the Commission’s portal, in person at any Gaming Commission office located at a licensed Missouri casino, or at the Commission’s Jefferson City headquarters during business hours. You will need a government-issued photo ID and a current photograph, and you cannot sign up while under the influence of alcohol or drugs.
Once you are on the list, licensed operators must make reasonable efforts to stop you from placing bets, but the legal responsibility for staying away from gaming areas is yours. The Compulsive Gaming Prevention Fund set up by Amendment 2 guarantees at least $5 million a year in state money for counseling, treatment programs, and grants to organizations that help problem gamblers.1Missouri Revisor of Statutes. Missouri Constitution Article III Section 39(g)
Filing a Complaint Against an Operator
Complaints go to the Missouri Gaming Commission. If something happens at a physical sportsbook, ask to speak with the Gaming Commission agent on duty at that location as soon as possible after the incident. Otherwise, call the Commission’s Jefferson City office at (573) 526-4080 or submit a written complaint form.6Missouri Gaming Commission. Casino Gaming Complaint Procedure
After you file, the Commission reviews whether the issue falls within its authority, assigns an agent to investigate, and mails you a summary of findings when the investigation closes. Customer service disputes about promotions or account credits usually have to be worked out with the operator first. The Commission steps in when there is an apparent violation of law or gaming regulation, not when you disagree with a company’s bonus terms.