California Prediction Markets – The Honest Take for California Players In 2026
If you came to GamblingCalifornia.com to figure out what is going on with California prediction markets, this is the right page. Prediction markets like Kalshi and Polymarket have exploded in popularity over the past two years, and they are technically available to California residents. They have also become one of the most legally embattled corners of the entire US gambling and gambling-adjacent industry, with state attorneys general suing operators, the federal government suing back at the states, criminal charges flying in Arizona, and a real possibility that the whole sports contracts side of the industry gets shut down by the Supreme Court within a year or two. I am writing this page to give you the straight story, not to push you toward signing up.
I want to be clear upfront: I do not recommend prediction markets to California players. That is not because I think they are a scam or because they are blatantly illegal in California today. It is because the legal status is genuinely unsettled, the platforms have shown some serious vulnerabilities around insider trading, and California specifically has a track record of moving aggressively against unregulated forms of online gambling. The state just banned sweepstakes casinos with AB 831, which I cover on the California sweepstakes casinos page, and prediction markets fit a similar profile. If you are looking for a way to bet on sports or events from California, I think there are better options. But this page covers the topic honestly so you can decide for yourself.
What Are Prediction Markets and How Do They Work?
A prediction market is an online platform where users buy and sell contracts tied to the outcomes of future events. Each contract represents a “yes” or “no” position on whether something will happen by a certain date. If the event happens as predicted, the “yes” contracts pay out at $1 each. If it does not, the “no” contracts pay out instead. The price of each contract fluctuates based on what users think the probability of the outcome is. A contract priced at 65 cents is essentially the market’s collective estimate that the event has a 65 percent chance of happening.
The kinds of events you can trade on prediction markets are wide-ranging. Sports outcomes (will the Lakers beat the Warriors tonight?), elections (will candidate X win the primary?), economic indicators (will the Fed cut rates this month?), entertainment events (will this movie cross $200 million at the box office?), weather (will it rain in Los Angeles tomorrow?), and even more unusual stuff like geopolitical events and crypto prices. The variety is huge and growing, although in practice sports contracts dominate the volume on every major platform.
The mechanics work differently from traditional sports betting. Instead of placing a bet at fixed odds with a sportsbook, you are buying a contract from another user (or from market makers) who is taking the opposite side. You can also sell contracts mid-event if you want to lock in profit or limit losses, similar to selling a stock before it matures. Prediction markets describe themselves as financial exchanges rather than gambling platforms, and that distinction is at the center of the legal fight.
Are Prediction Markets Legal in California?
The honest answer is “currently yes, but it is complicated and could change.” Prediction markets operate at the federal level under the Commodity Futures Trading Commission, which is the same agency that regulates futures contracts on commodities like oil, corn, and currencies. The CFTC has approved several platforms (including Kalshi and the entities Polymarket acquired to enter the US market) as Designated Contract Markets, which is a legal status that allows them to offer event contracts to US users. Under federal law, when an exchange is approved by the CFTC, it can generally operate nationwide.
California has not specifically banned prediction markets, and there is no California Attorney General opinion or executive order that declares them illegal for residents. Governor Newsom signed an executive order on March 27, 2026, but that order specifically targets state officials (gubernatorial appointees) using non-public information on prediction markets. It does not affect regular California residents who use these platforms. So as of mid-2026, you can sign up for Kalshi or Polymarket from California, deposit money, trade contracts, and withdraw winnings without any state law specifically prohibiting it.
The complicated part is that the legal status depends on whether the federal CFTC framework actually preempts California’s authority to regulate these platforms as gambling. That question is being litigated all over the country. A federal appeals court (the Third Circuit) ruled in April 2026 that Kalshi can operate in New Jersey based on federal preemption. The Ninth Circuit, which covers California, was hearing arguments in April 2026 and reportedly leaned toward Nevada’s side in a similar case. If the Ninth Circuit rules against the prediction markets, California could potentially move against these platforms in ways it currently has not. The Supreme Court is widely expected to take up the issue within the next year or two to resolve the conflicting circuit decisions. For more on the federal regulatory framework, you can check the Commodity Futures Trading Commission’s official website.
The CFTC vs. States Jurisdictional Fight
This is the central legal battle that will determine whether prediction markets remain available in California and other states. The dispute is essentially about who has authority to regulate these platforms.
The CFTC’s position is that prediction markets are financial derivatives exchanges, not gambling platforms. Event contracts fall under the definition of a “swap” in the Commodity Exchange Act, which gives the CFTC exclusive federal jurisdiction. When a CFTC-licensed exchange offers event contracts, the agency argues, states cannot apply their gambling laws to that activity because federal law preempts state regulation in this area. The CFTC has filed lawsuits against multiple states (including Arizona, Connecticut, and Illinois in April 2026) specifically to block state enforcement actions.
The states’ position is that prediction markets, especially the sports contracts that make up most of the volume, are functionally identical to sports betting. Sports betting is regulated under state authority following the 2018 Supreme Court ruling that struck down PASPA. States argue that allowing prediction markets to offer sports contracts creates an unregulated parallel sports betting market that bypasses the state licensing, taxation, consumer protection, and tribal exclusivity frameworks that apply to traditional sportsbooks. More than a dozen state attorneys general have sent cease-and-desist letters or filed lawsuits.
The court rulings have gone both ways. Kalshi has won preliminary injunctions in New Jersey and Tennessee, where federal courts found the company likely to succeed on its preemption argument. Maryland ruled in the other direction, finding that state gaming authority can coexist with CFTC regulation. Nevada won a preliminary ruling against Kalshi at the federal district court level and the Ninth Circuit cleared the way for the state’s restrictions in March 2026. Massachusetts has required Kalshi to geofence sports markets pending an appeal at the state Supreme Judicial Court. The result is a genuine legal mess with conflicting outcomes across jurisdictions, which is exactly the kind of situation that ends up at the Supreme Court.
Major Prediction Market Platforms
The prediction market space has consolidated around a handful of major operators, with traditional sportsbooks recently launching their own competing products.
Kalshi is the largest US-regulated prediction market and the company at the center of most of the litigation. Kalshi was founded in 2018 and received CFTC approval as a Designated Contract Market. The platform offers contracts on sports, elections, economics, weather, entertainment, and a wide range of other events. Kalshi reports billions of dollars in monthly volume and recently received a valuation of $22 billion. The company is the lead defendant or plaintiff in cases across at least a dozen states.
Polymarket was originally a crypto-based offshore prediction market that gained massive attention during the 2024 US presidential election. The platform was banned from operating in the US by the CFTC in 2022 over compliance issues, but returned to the US market in late 2025 after acquiring CFTC-licensed entities QCX LLC and QC Clearing LLC. The relaunch began with a waitlist in December 2025. Polymarket has roughly $20 billion in valuation and is partnered with Major League Baseball.
DraftKings Predictions launched in December 2025, with the major sportsbook entering the prediction markets space. The product is available in 38 states with sports markets in 17 of those.
FanDuel Predicts launched in January 2026 as FanDuel’s competing prediction markets product. Like DraftKings, FanDuel sees prediction markets as a way to enter states like California that have not legalized traditional sports betting.
Robinhood and Crypto.com have both launched prediction market products, although their offerings are smaller than Kalshi and Polymarket. Robinhood has been the subject of state cease-and-desist actions in some jurisdictions.
I am not linking to any of these platforms because I am not recommending them. If you want to research them yourself, they are easy to find through any search engine.
How Prediction Markets Differ From Sports Betting
Prediction market operators argue their products are fundamentally different from sports betting, but for the average user the practical experience can feel pretty similar. Here is how the technical differences break down.
At a sportsbook, you place a bet at fixed odds. You put $100 on the Lakers at -110 and you either win $90.91 if they win or lose $100 if they lose. The odds are set by the sportsbook and reflect their margin (the vig). On a prediction market, you buy a contract that represents a “yes” or “no” position. If you think the Lakers will win, you might buy a “yes” contract at 50 cents, which would pay $1 if they win and $0 if they lose. The price moves continuously based on supply and demand from other traders. You can sell your contract before the game ends to lock in profit or cut losses, which is something traditional sportsbooks generally do not allow except through cash-out features that include a worse price.
The financial exchange framing is what allows prediction markets to operate under CFTC oversight rather than state gambling regulators. The CFTC sees event contracts as analogous to futures contracts on commodities. The states see sports contracts as bets dressed up in financial market language. From an outcome perspective, betting “yes” on the Lakers winning is functionally the same as placing a moneyline bet on the Lakers. The economic exposure is identical. Whether the wrapper around it changes the legal analysis is the question that has launched dozens of lawsuits.
For a typical user, the user experience differences are real but modest. Prediction markets often offer better pricing than sportsbooks (because the spread between yes and no prices can be tighter than the vig at a sportsbook), the ability to sell positions mid-game, and access to markets that traditional sportsbooks do not offer (politics, weather, entertainment events). On the other hand, prediction markets often have less liquidity on smaller markets, more complex interfaces, and account verification processes that resemble brokerage accounts rather than sportsbook signups.
The Role of Sports Contracts in Prediction Market Volume
Here is the open secret of the prediction markets industry. Despite the marketing as platforms for trading on a wide range of events, sports contracts dominate the volume by enormous margins. According to a Congressional Research Service report, sports made up almost 90 percent of bets on Kalshi in the year ending February 2026. On Polymarket, sports were 38 percent of contracts but the largest single category. Reports suggest sports wagers accounted for over 85 percent of all bets on Kalshi during March Madness 2026, with the platform earning $25 million in fee revenue from one four-day stretch.
This matters because it undermines the central legal argument that prediction markets are financial exchanges rather than gambling platforms. If the platforms were primarily about trading on economic indicators, election outcomes, and weather, the financial exchange framing would be more credible. When 80 to 90 percent of the volume is on NFL games, NBA games, MLB games, and college football, the platforms look a lot more like unlicensed sportsbooks. State regulators have repeatedly cited the sports volume as evidence that prediction markets are gambling operations dressed up in derivatives clothing.
It also means that whatever happens with sports contracts will basically determine the future of the industry. If the Supreme Court eventually rules that sports event contracts are not federally preempted, or that they require state licensing as sports betting, the entire prediction markets business model collapses. Kalshi’s $22 billion valuation and Polymarket’s $20 billion valuation are both heavily dependent on the assumption that sports contracts will continue to be allowed nationwide. That is a risky bet given the state of the litigation.
Newsom’s March 2026 Executive Order
California Governor Gavin Newsom issued an executive order on March 27, 2026, addressing prediction markets, although the order is narrower than some headlines suggested. The executive order prohibits California gubernatorial appointees from using non-public information they learned through their official duties to trade on prediction markets. It does not ban prediction markets, does not ban California residents from using them, and does not affect platforms’ ability to operate in the state.
The order was prompted by growing concerns about insider trading on these platforms. The CFTC issued an advisory on insider trading in February 2026, and there have been multiple high-profile cases of suspected insider activity throughout 2025 and 2026. The executive order is California’s first formal response to the prediction markets industry, and it suggests the state is paying attention even if it has not moved to broader restrictions.
For everyday California residents, the practical effect of the order is essentially zero. You are not affected unless you are a state appointee with access to non-public information. But the symbolic significance is real. The Newsom administration has signaled that prediction markets are on its radar, which matters when you remember that the same administration signed the AB 831 sweepstakes casino ban a few months earlier.
Other States Cracking Down on Prediction Markets
To understand where California might be headed, look at what other states have done. The list of states that have moved against prediction markets is long and growing.
Nevada issued a cease-and-desist to Kalshi in March 2025. A federal district court ruled for Nevada in November 2025, and the Ninth Circuit cleared the way for the state’s temporary ban in March 2026. The Ninth Circuit’s decision affects the entire western US, including California, although it does not directly require California to take any action.
New Jersey tried to block Kalshi but was overruled by the Third Circuit in April 2026, which found that sports event contracts are swaps and federally preempted. This is the strongest ruling in favor of prediction markets so far.
Massachusetts required Kalshi to geofence sports markets pending appeal. The state Supreme Judicial Court was scheduled to hear arguments on May 4, 2026.
Arizona filed a 20-count criminal information against Kalshi on March 17, 2026, alleging illegal gambling operation and election wagering. The CFTC sued Arizona on April 2, 2026, and a federal judge halted the criminal case on April 10, 2026.
Illinois sent cease-and-desist letters to more than a dozen operators starting in April 2025. The CFTC sued Illinois on April 2, 2026.
Michigan filed a civil enforcement action against Kalshi on March 4, 2026.
Tennessee sent cease-and-desist letters in late 2025, but Kalshi obtained a preliminary injunction blocking enforcement.
Maryland went the other way, with a federal court denying Kalshi’s preliminary injunction request in August 2025.
Connecticut issued cease-and-desist orders in December 2025.
Other states with active enforcement or litigation include New York, Ohio, and Wisconsin. As of mid-2026, more than 20 active lawsuits are pending across at least 14 states.
The Insider Trading Scandals
One reason I am not enthusiastic about prediction markets is that the platforms have shown some real vulnerabilities around insider trading and market manipulation. The cases that have come out over the past year are concerning.
The most prominent case involved a US Army Special Forces soldier who was indicted by the Justice Department in 2026 for allegedly making approximately $400,000 on Polymarket by betting on US military strikes in Venezuela using classified information he had access to through his military duties. The trades were executed shortly before the strikes occurred, and the suspicious timing was flagged by reporters before the indictment came down. The soldier had used his personal email to open the Polymarket account, which is how he was eventually identified.
Kalshi suspended and fined three candidates for elected office for trading on contracts tied to their own campaigns. The penalties were described as the platform’s first major insider trading enforcement actions. Kalshi also penalized an employee of YouTube creator Mr. Beast for trading on contracts tied to the Mr. Beast YouTube channel based on inside information about the channel’s performance.
Beyond these specific cases, there have been multiple instances of suspiciously well-timed trades on Polymarket related to military strikes, world leader changes, and major policy announcements. None of these have led to criminal charges yet, partly because most Polymarket users trade through cryptocurrency wallets that obscure their identities. Polymarket’s structure, where wallet addresses do not directly link to real-world identities unless the user provides them, makes insider trading enforcement particularly difficult.
The platforms have responded with public commitments to market surveillance and integrity. Both Kalshi and Polymarket maintain that the vast majority of trading is legitimate and that they are committed to identifying and penalizing bad actors. Whether that is sufficient to address the structural issues remains to be seen. From a player perspective, the insider trading concerns matter because if you are trading against people with non-public information, you are at a systemic disadvantage that is hard to overcome.
Why I Don’t Recommend Prediction Markets to California Players
Here is my honest take on why I am not enthusiastic about California players using prediction markets, even though they are technically available.
The legal status is unsettled. Prediction markets exist in a state of active litigation. The Supreme Court could take a case, rule against the platforms, and effectively shut down sports contracts within months. State-level enforcement could expand to California specifically. The platforms could be forced to exit California suddenly, leaving you scrambling to redeem balances. This is similar to what happened with sweepstakes casinos when AB 831 took effect on January 1, 2026.
California has shown a pattern of cracking down. The state just banned sweepstakes casinos. The state Attorney General just declared daily fantasy sports illegal. The same tribal coalition that drove both of those actions has prediction markets in its sights. CNIGA Chairman James Siva specifically cited prediction markets as a reason for the tribes’ renewed push for sports betting legalization in 2028. If California decides to follow the sweepstakes path with prediction markets, the platforms could go from available to banned in a matter of months.
The insider trading vulnerabilities are real. Trading against people with non-public information is a losing proposition for casual users, even when the platforms are operating in good faith. Until the industry has a stronger track record of identifying and removing bad actors, the structural disadvantage for regular users is meaningful.
Better alternatives exist. If you want to bet on sports from California, offshore sportsbooks have been operating in the same gray area for over twenty years and have established track records. If you want exposure to entertainment events or political outcomes, those markets exist at offshore sportsbooks too. If you want a financial exchange experience, regulated stock and options brokers offer that without the legal uncertainty. Prediction markets sit awkwardly between these categories without offering a meaningful advantage over alternatives.
The platforms are not licensed in California. Even though they are CFTC-regulated at the federal level, California state regulators have no oversight, no consumer protection authority, and no dispute resolution process for California users. If something goes wrong with your account, your options are limited.
None of this means prediction markets are inherently bad or that you cannot use them legally today. It means I think the risk-reward calculation does not favor casual California users, especially when alternatives exist that have been more thoroughly tested over time.
The Likelihood of a California Ban
Could California follow the sweepstakes path and ban prediction markets specifically? The honest answer is “yes, eventually, although the legal complications are different.”
The case for a California ban is straightforward. The same tribal coalition that just won the AB 831 fight is publicly hostile to prediction markets. Tribes argue that prediction market sports contracts violate their exclusivity rights under Proposition 1A in the same way they argued sweepstakes casinos did. The Newsom administration has shown willingness to act on tribal priorities. The Attorney General has been active on online gambling issues. The California legislature has shown unanimous willingness to pass restrictive online gambling legislation.
The case against a quick California ban is the federal preemption issue. If the courts ultimately rule that CFTC oversight preempts state gambling laws on prediction markets, California cannot simply pass a ban without running into federal supremacy issues. The state would either have to wait for the courts to rule against preemption or pass legislation that targets specific aspects of the platforms in ways that survive constitutional review. That is harder than simply banning sweepstakes casinos, which had no federal regulatory framework to claim preemption from.
My best guess is that California will move against prediction markets within the next 12 to 24 months, but the timing depends heavily on how the federal court cases play out. If the Supreme Court rules against the platforms or if the Ninth Circuit issues a strong ruling for Nevada, California will likely move quickly. If the courts rule for the platforms, California might wait longer or pursue a narrower approach focused on specific issues like insider trading or contract types.
Legitimate Alternatives for California Players
If you have been using prediction markets primarily for sports action, several alternatives exist that are more established and arguably safer for California residents.
Offshore sportsbooks have served California players for over two decades. They operate in the same kind of gray area as prediction markets, but with much longer track records, established consumer protection through public reputation, and broader market coverage. The major established brands have been paying California winners for over twenty years. For more on these, see our California sportsbooks page.
Offshore online casinos cover the casino-style gambling that some prediction market users are looking for. The same gray-area legal status applies, but with even longer track records than sportsbooks. See our California online casinos page.
Licensed advance deposit wagering for horse racing is fully legal in California through state-licensed operators. If you want to bet on sporting events from California with no legal questions, horse racing is the only category where you have a clear legal path. See our California horse betting page.
The California State Lottery offers various games for California residents, although nothing that resembles event-contract trading.
If your interest in prediction markets is specifically about non-sports contracts (politics, weather, economic indicators), the alternatives are thinner. Some offshore sportsbooks offer entertainment and political prop bets. Stock and options trading through brokers like Robinhood, Schwab, or Fidelity gives you exposure to economic outcomes through actual financial markets. None of these is a perfect substitute, but they cover most of the practical use cases.
5 FAQs About California Prediction Markets
1. Can I get in trouble for using Kalshi or Polymarket from California?
Practically speaking, no. The platforms are operating under CFTC approval and there is no California law that specifically prohibits residents from using them. There are no known cases of California residents being charged for trading on prediction markets. The legal exposure, if any, is on the operators and the supporting infrastructure (payment processors, geolocation providers), not on individual users.
2. Will I owe taxes on prediction market winnings?
Yes. Any income from prediction market trading is taxable at the federal level and in California. The tax treatment is currently unclear (whether profits are ordinary income, capital gains, or gambling winnings), and Kalshi has not been issuing 1099-B forms as of 2026. The IRS has not issued formal guidance. You should consult with a tax professional and report your winnings either way. The lack of automatic reporting does not mean you do not owe taxes.
3. How old do I have to be to use prediction markets in California?
Most prediction market platforms require users to be 18 or older. Some platforms require 21 in jurisdictions with specific age requirements for gambling. Kalshi and Polymarket both have age verification as part of their account creation process.
4. Could the federal government shut down prediction markets?
Yes, if the courts rule that the CFTC overstepped its authority by approving event contracts on sports outcomes. The Supreme Court is widely expected to take up this question within the next year or two. Multiple bills in Congress would also restrict or ban certain types of event contracts, especially on elections, military actions, and sports. The probability of a near-term federal ban is moderate but real.
5. What happens to my account if California bans prediction markets?
Based on what happened with sweepstakes casinos under AB 831, you would likely have a wind-down period to redeem your balance before the platform restricted California access. The exact timeline would depend on the specific legislation or enforcement action. The risk is that you could be left with a balance you cannot easily access if a ban happens suddenly. This is one of the practical reasons I do not recommend keeping significant funds on these platforms.
One more thought as we wrap this up. Prediction markets are marketed as a sophisticated way to trade on real-world outcomes, but the reality is that for most users they function as gambling with extra steps. The legal uncertainty, the insider trading risks, and the structural disadvantage of trading against better-informed users all add up to a worse risk-reward profile than the alternatives I would point you to. If you are using prediction markets, treat the money as gambling money, not investment capital, and only put in what you can afford to lose entirely. If gambling of any kind is becoming more than entertainment for you, the California Office of Problem Gambling has free, confidential support 24/7 at 1-800-GAMBLER or online at problemgambling.ca.gov. The next contract will always be there.