California Online Gambling Guide
Legal status across sweepstakes casinos, licensed operators, and prediction markets · Last reviewed: May 2026
Legal Status Overview
Statutory ban effective January 1, 2026. Governor Newsom signed AB 831 on October 11, 2025, prohibiting all dual-currency sweepstakes casino operations. Passed unanimously in both chambers. All major platforms exited by December 31, 2025. Criminal penalties apply to operators and supporting businesses.
No legal online sports betting or online casino. Voters rejected Prop 26 and Prop 27 in November 2022 by 70%+ margins. CA AG opined paid DFS is illegal under state law (July 2025). Tribal leaders confirmed no 2026 ballot measure — 2028 is the earliest realistic window.
Kalshi and Polymarket US are available in California. Federal courts denied tribal gaming injunctions against Kalshi (November 2025). California state government has not issued enforcement action against prediction market platforms. Newsom's March 2026 executive order restricts only state employees, not consumers.
California's online gambling landscape in 2026 is defined by two major closures and one notable opening. Sweepstakes casinos are banned by statute — California was the largest sweepstakes market in the US at an estimated 17% of national revenue, making AB 831 the most economically significant ban enacted anywhere. Online sports betting and casino gaming remain unavailable, with voters having rejected legalization in 2022 and tribal leaders confirming no near-term ballot initiative. The one category that remains open is CFTC-regulated prediction markets, where Kalshi and Polymarket US are accessible following federal courts rejecting tribal gaming injunctions. For California players, prediction markets currently represent the only regulated online betting alternative available in the state.
California Law Breakdown
California gambling law is governed by the California Gambling Control Act (Business and Professions Code § 19800 et seq.), the Penal Code gambling provisions (§§ 319–337o), and a network of tribal-state compacts under the Indian Gaming Regulatory Act. The California Gambling Control Commission licenses and regulates non-tribal gaming, including approximately 80 commercial cardrooms. The state's 70+ tribal casinos operate under separate tribal-state compacts regulated jointly by the CGCC and individual tribal gaming commissions. Online gambling of any form requires a constitutional amendment approved by California voters — a structurally high bar that explains why the state remains one of the few large US markets without legal online sports betting. In 2025–2026, the state's primary legislative gambling actions were the sweepstakes casino ban (AB 831) and the AG's formal opinion on DFS legality.
Defines "online sweepstakes game" as any game, contest, or promotion that utilises a dual-currency system allowing a player to become eligible for prizes, awards, cash, or cash equivalents, and simulates casino-style gambling including slots, video poker, table games, bingo, and sports wagering simulations. Makes it unlawful for any person or entity to operate, conduct, offer, or promote an online sweepstakes game in California. Critically extends liability to any financial institution, payment processor, geolocation provider, gaming content supplier, platform provider, or media affiliate that knowingly and willfully supports the operation. Violations are criminal misdemeanors: fines from $1,000 to $25,000 per violation, up to one year in county jail, or both. The bill explicitly preserves lawful operations of CGCC-licensed gambling enterprises and the state lottery — the ban targets the sweepstakes model specifically. Also amends Business and Professions Code § 17539.1 to cover web and app-based gambling simulations under unfair business practice provisions.
Establishes the California Gambling Control Commission as the primary licensing and regulatory authority for controlled gambling in California. Defines "controlled gambling" as any game played for money, credit, or any representative of value where the house receives compensation in the form of a percentage of wagers or a fee. Licensed gambling establishments are limited to cardrooms offering banked card games and certain non-banked games. The Act does not authorise online gambling of any form — no online casino, no online sportsbook. Any expansion of gambling in California that exceeds the constitutional limits requires either a tribal-state compact negotiated under IGRA or a constitutional amendment approved by California voters. This constraint, not a simple legislative majority, is why California remains without legal online sports betting despite years of legislative interest.
Establishes the foundational criminal prohibitions on gambling in California. § 330 prohibits banking and percentage games at locations other than licensed cardrooms. § 337a prohibits bookmaking, pool selling, and related betting activity. § 319 defines lotteries (prize, chance, consideration) and makes operating an unlicensed lottery a misdemeanor. The Los Angeles City Attorney relied on existing Penal Code provisions — specifically § 337a's prohibitions on betting schemes — when filing a first-of-its-kind civil lawsuit against Stake.us and several of its vendors in August 2025, before AB 831 took effect. That action demonstrated that California prosecutors were willing to pursue sweepstakes platforms under pre-existing statutes even before the dedicated ban was signed into law.
In July 2025, California AG Rob Bonta issued a formal legal opinion concluding that paid daily fantasy sports contests are prohibited under existing California law. The opinion characterises paid DFS as illegal sports wagering under CA Penal Code § 337a, which prohibits pool selling and related betting on sporting events. The opinion is not binding law — it does not change statute — but it materially changes the enforcement risk for operators and signals the AG's willingness to act. DraftKings, FanDuel, and Underdog continue to operate DFS in California, but the opinion creates ongoing legal uncertainty. Underdog filed a lawsuit in July 2025 to stop the AG from releasing the opinion, highlighting the operator community's concern about its implications.
Sweepstakes Casinos in California
Licensed Operators in California
Online casino gaming and online sports betting are not legal in California. No licensed online operator — including FanDuel, DraftKings, BetMGM, or Caesars — holds authority to accept online sports or casino wagers from California residents. The California Gambling Control Commission licenses approximately 80 commercial cardrooms for in-person card games. California's 70+ tribal casinos operate slots, table games, and poker under tribal-state compacts — in person only. Horse racing wagering is available online through platforms like TwinSpires and TVG. Online expansion requires constitutional amendment via statewide voter referendum.
These are the only legal gambling options available to California residents. No online casino or online sportsbook is authorised. Horse racing wagering via ADW platforms (TwinSpires, TVG) is the only legal form of real-money online wagering beyond the state lottery. DFS remains in a legal grey area following the AG's July 2025 non-binding opinion that paid DFS is illegal under current law.
Prediction Markets in California
CFTC-regulated prediction market platforms are available in California as of May 2026. Unlike in New York, the California state government has not issued cease-and-desist orders against Kalshi or other prediction market operators. Three California tribal gaming groups sued Kalshi and Robinhood in federal court in July 2025, alleging violation of tribal gaming compacts under IGRA — but the Northern District of California denied their injunction request in November 2025, ruling that federal law exempts CFTC-regulated transactions from the tribal challenge. Governor Newsom signed an executive order in March 2026 banning state employees from using inside knowledge to bet on prediction markets, targeting conflicts of interest — this does not restrict consumer access to prediction market platforms.
Fully accessible in California as of May 2026. Federal court rejected tribal gaming injunction in November 2025. No California state enforcement action identified. Covers sports, politics, economics, and other event contracts.
Returned to US market via QCEX in December 2025. Available in California, currently in limited invite-code beta with sports markets. Mobile only at present.
Active Legislation
2025 Session — Enacted Legislation
Introduced February 2025 and backed from the outset by a coalition of California tribal gaming interests including the California Nations Indian Gaming Association (CNIGA) and San Manuel Band of Mission Indians. Tribes argued sweepstakes platforms violated their exclusive gaming rights under tribal-state compacts. Passed unanimously: Senate 36-0, Assembly 63-0. Signed by Governor Newsom October 11, 2025. Effective January 1, 2026. Adds CA Penal Code § 337o and amends Business and Professions Code § 17539.1. LA City Attorney had already filed a civil action against Stake.us and vendors in August 2025 under pre-existing statutes, demonstrating the enforcement environment before AB 831 took effect. California's sweepstakes market was the largest in the US at approximately 17% of national revenue and approximately $1 billion in annual sales.
Governor Newsom signed an executive order on March 27, 2026 prohibiting California state employees from using non-public government information — inside knowledge — to place trades on prediction market platforms. The order was framed as an anti-corruption measure targeting the conflict of interest created by state officials having advance access to government decisions that are traded as event contracts on platforms like Kalshi. The order does not restrict consumer access to prediction markets. It does not constitute state enforcement action against prediction market platforms themselves. Newsom explicitly criticised the Trump administration's permissive approach to prediction markets in his signing statement, calling the situation one where "big corporations" are prioritised over consumer interests. This is the first California-specific action relating to prediction markets — it targets public ethics, not platform legality.
Player Guidance
California players face one of the most restricted online gambling environments of any large US state. Sweepstakes casinos are banned by statute with criminal penalties. Online sports betting and casino gaming are unavailable with no legal path until at least 2028. Prediction markets currently represent the only regulated online alternative for event-based wagering — and the only category where federal courts have actively protected access against state and tribal challenges.
CA Penal Code § 337o prohibits not only platform operators but also the payment processors and geolocation providers that support them. Criminal misdemeanor penalties apply to operators and supporting businesses, not individual players — but attempting to circumvent the ban via VPN violates platform terms of service and creates additional risk. There are no legal dual-currency sweepstakes alternatives in California.
CFTC-regulated prediction markets are accessible in California and operate under federal derivatives law independent of California's gambling statutes. Federal courts have rejected tribal gaming challenges to Kalshi in California. The platforms cover sports, politics, economics, entertainment, and other event contracts. For California sports fans who have no legal sportsbook option, prediction markets currently offer the only regulated way to stake money on sports outcomes from within the state.
Tribal leaders have confirmed no 2026 ballot initiative. The earliest realistic window for a sports betting ballot measure is November 2028, and that requires tribal and commercial operator alignment that has not yet been achieved. Offshore sportsbooks remain illegal, unregulated, and offer no consumer protection if disputes arise. If you want to bet on sports legally while in California today, prediction markets are the only available regulated option.
California AG Rob Bonta issued a formal opinion in July 2025 concluding that paid DFS is illegal under existing state law. The opinion is not binding — DraftKings, FanDuel, and Underdog continue operating in California — but it signals a meaningful enforcement risk shift. Underdog is currently challenging the opinion in court. If you participate in paid DFS in California, be aware this legal uncertainty exists and monitor developments.
Unlike Florida and Texas, California has a state income tax with a top rate of 13.3%. All gambling and prediction market winnings are subject to both federal income tax and California state income tax. Tribal casino wins may be subject to different reporting requirements. Prediction market platforms typically do not issue formal tax documents — keep your own records of all trades, deposits, and withdrawals. View Regulation Tracker →
Change Log
| Date | Version | Update |
|---|---|---|
| May 2026 | 1.0 | Page published. Legal status research completed May 2026. Sources: CA Penal Code § 337o (AB 831, signed Oct 11 2025); CA Business and Professions Code § 19800; CGCC — cgcc.ca.gov; CA AG opinion July 2025; N.D. Cal. tribal injunction denial Nov 2025; Governor Newsom EO March 27, 2026; CFTC DCM registration records. |