California Prediction Markets: Best Sites & Legal Platforms 2026

Are prediction markets legal in California?

Yes, prediction market apps are currently legal in California, even though the state does not allow traditional sports betting. These platforms operate under a different legal framework and are federally regulated by the Commodity Futures Trading Commission rather than by state gambling authorities. Instead of betting against a sportsbook, users trade predictions against other participants on an exchange-style market.

However, the regulatory outlook could change as the debate over California sports betting continues. The California Department of Justice has said it is monitoring legal challenges in several states, and outcomes could influence future regulation. Tribal groups, such as the California Nations Indian Gaming Association, have also urged regulators to restrict prediction markets, arguing that they bypass the Indian Gaming Regulatory Act, though their legal efforts have not succeeded so far.

California prediction market apps reviewed

Since California prediction markets can operate legally, there isn’t any shortage of options for sports fans in the Golden State, complete with prediction market promos. Check out our favorite CA prediction markets below:

Kalshi - Best prediction market app
Crypto.com - Best crypto prediction app
Underdog - Best for pick-em style
Polymarket- World's largest prediction site
FanDuel Predicts- Best for beginners

1. Kalshi - Best California prediction market app

4.8

My expert analysis

Kalshi was the first prediction market platform to let Californians buy and sell event contracts, and it remains one of the most popular. The CFTC-regulated platform provides a decent $10 welcome bonus, accepts minimum deposits of just $1 using either fiat or crypto, and offers a wide range of markets on sports, politics, culture, and more. It’s a great platform to join if you’re just getting your feet wet with trading event contracts.

Kalshi at a glance

	Kalshi
Kalshi sign-up bonus	$10 Trading Bonus
Kalshi promo code	COVERS
Top feature	Legal sports trading
Minimum deposit	$1
Eligible states	Most states + DC
Legal age	18+
Kalshi mobile app	iOS & Android
Offer expiry	Ongoing

Read more in our comprehensive Kalshi review to learn about one of the top prediction market apps of 2026 and the Kalshi promo code 'COVERS'.

2. Crypto.com - Best crypto prediction market app

4.7

My expert analysis

Crypto.com has a smaller selection of markets than the other platforms, and is primarily focused on sports-related contracts for now. As the name suggests, the platform is crypto-focused and allows you to trade and store hundreds of crypto coins in your account. Crypto.com is a good choice if you are a keen crypto user or interested in that world, but you also want to try your hand at some sports predictions.

Crypto.com offers the top welcome bonus among the prediction market platforms listed here. It offers up to $50 in new plate credits and lets you claim up to 1 BTC in CRO tokens when you meet certain trading milestones in your first month on the platform.

Crypto.com at a glance

	Crypto.com
Crypto.com sign-up bonus	$50 Bonus
Crypto.com referral code	Applies automatically
Top feature	Legal sports trading
Minimum deposit	$10
Eligible states	Most states + DC
Legal age	18+
Crypto.com mobile app	iOS & Android
Offer expiry	Ongoing

Learn more in our Crypto.com review and all about the Crypto referral code offer.

3. Underdog - Best for pick'em-style predictions

4.8

Ends: Dec. 31, 2026

My expert analysis

Underdog is a prediction-focused platform built for sports fans who enjoy player-based “pick’em” style markets. Users make simple yes/no or over/under predictions on player stats, game outcomes, or prop bets, often in a fantasy-style format. What sets Underdog apart from platforms like Kalshi and Polymarket is its casual, gamified approach: instead of complex event contracts or crypto-centric trading,

Underdog emphasizes easy-to-understand, fast-turnover predictions that appeal to everyday sports fans rather than professional traders. Its focus on accessibility, short-term engagement, and player props makes it uniquely suited for casual, daily sports interaction.

Underdog at a glance

	Underdog
Underdog sign-up bonus	Play $5, Get $50 in Bonus Entries (DFS only)
Underdog promo code	COVERS
Top feature	Legal sports trading
Minimum deposit	$5
Eligible states	AK, AL, AR, AZ, CA, CO, FL, GA, IL, IN, KS, KY, MA, MI, MN, MO, MS, NC, ND, NE, NH, NJ, NM, NY, OH, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WI, WV, WY
Legal age	18+ (19+ in AL + NE, 21+ in AZ + MA)
Underdog mobile app	iOS & Android
Offer expiry	Ongoing

Dig into all the key features and promotions associated with the Underdog promo code 'COVERS'.

Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog Fantasy operates. Terms apply. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit www.ncpgambling.org. NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369)

4. Polymarket - World's largest prediction site

4.2

My expert analysis

Polymarket is expected to enter the U.S. market soon, and users can get early access with the invite code 'COVERS' to try one of the most anticipated prediction market apps of 2026. More crypto-centric than Kalshi, the platform supports a wide range of cryptocurrencies (with the option to purchase crypto on-site using fiat) and features extensive markets focused on trending stories, breaking news, crypto developments, and major events through simple “Yes” or “No” contracts — making it appealing to both data-driven traders and traditional sports bettors.

Polymarket at a glance

	Polymarket
Polymarket sign-up bonus	Coming Soon
Polymarket promo code	Invite Code: COVERS
Top feature	Trade real-world events instantly
Minimum deposit	N/A
Eligible states	All 50 states + DC except for AR, AZ, CT, IL, LA, MA, MD, MI, NV, and OH.
Legal age	18+
Polymarket mobile app	iOS & Android
Offer expiry	N/A

Explore our in-depth Polymarket promo code page for everything you need to know about this impactful operator.

5. FanDuel Predicts - Best for beginners

My expert analysis

FanDuel Predicts is one of the newest prediction market platforms, but it has already made its mark in California. It offers a standalone app separate from its online sportsbook and casino apps. It also gives you access to all of its biggest markets, including sports, economics, finance, and commodities.

It’s one of the few prediction market platforms that operates seamlessly in all 50 states, and it will be perfect if you’re searching for a platform with an easy-to-navigate app. Existing FanDuel users will appreciate its familiar design, too.

FanDuel Predicts at a glance

	FanDuel Predicts
FanDuel Predicts sign-up bonus	Coming Soon
FanDuel Predicts promo code	Applies automatically
Top feature	Fully integrated platform
Minimum deposit	$5
Eligible states	All 50 states plus D.C. (sports trading available in 18 states)
Legal age	18+ (19 or 21 in some)
FanDuel Predicts mobile app	iOS & Android
Offer expiry	N/A

How to trade prediction markets in California

No matter which California prediction markets you choose to sign up for, you will be pleasantly surprised to see how simple it is. These platforms have simplified the process for beginners, so you don’t need any special expertise to start trading.

Here’s our step-by-step guide to help you:

Choose a prediction market platform

Begin by deciding which prediction market platform you wish to join. Make sure the platform accepts users in California and offers the markets that you are interested in. Other factors to consider include which deposit and withdrawal methods it accepts, the fees it charges, how many users it has, and whether the CFTC regulates it.

Complete identity verification

Even if you don’t need to complete identity verification right away at a CA prediction market, you will need to do so before you can withdraw any money. We recommend getting this step out of the way as soon as you sign up. Prepare to send your personal information, a government-issued photo ID, and any other documents a platform may request to fully verify your identity. All platforms must meet KYC requirements.

Enter a promo code

Some prediction market platforms automatically provide a welcome offer, similar to sportsbook promos, when you sign up for a new account without a promo code. Others ask you to enter a code to be eligible to collect one. If you have a promo code, make sure you enter it during registration or afterwards in your account to unlock your bonus. If in doubt about how to use your code, contact customer support.

Fund your account

Most California prediction market platforms will ask you to deposit funds into a new account before providing a sign-up bonus. You can usually use a variety of deposit methods to add to your balance, including credit/debit cards, ACH bank transfers, and wire transfers. Some platforms allow you to use cryptocurrencies to add funds to your account.

Start trading event contracts

As long as you’ve taken the necessary steps, you can begin trading event contracts within a couple of minutes. Most prediction markets base their event contracts around simple Yes/No questions, such as “Will the Boston Celtics win the NBA Championship?” Contracts are usually priced from $0.01 to $1.00, with higher prices indicating a higher probability of an outcome occurring. After you buy some contracts, you can hold them until the outcome, at which point they are paid out at $1 per contract, or you can sell them earlier if you prefer.

Withdraw earnings

Once you're ready to withdraw, return to the cashier, select 'Withdraw,' enter the amount, choose your preferred banking method, and click “Confirm” to complete the request. The top prediction market sites typically process withdrawals within an hour, though it should be completed within 24 hours at most.

Upcoming sports events to trade on

Since sports betting still isn’t legal in California, just about all of the prediction market platforms that operate in the state offer sports-related contracts. They generally cover a wide range of popular sports, including many of the same topics you would find at real-money sportsbooks.

What's more, the markets are updated in real time based on user interests. You can expect March Madness betting sites to take over the sports section soon, while the FIFA World Cup betting sites will dominate the summer of 2026.

Sport	League	Event	Date
Basketball	NCAAB	March Madness	March 17-April 6
Basketball	NCAAB	Women’s March Madness	March 18-April 3
Golf	PGA	The Masters	April 9-12
Football	NFL	NFL Draft	April 23-25
Basketball	NBA	NBA Playoffs	April 18-June 19
Soccer	FIFA	World Cup	June 11-July 19
Tennis	Tennis	AELTC/LTA	June 29-July 12

Prediction markets vs. sports betting in California

Although prediction markets and traditional sports betting share similarities, they operate under different models — particularly in how markets function, how prices are set, and how platforms generate revenue.

🤝 Market structure: peer-to-peer vs. the house

Prediction markets are peer-to-peer platforms where users trade event contracts directly with each other. When you take a position on an outcome, another participant is typically taking the opposite side. The platform simply facilitates the market and does not set prices or probabilities.

Sports betting works differently. When you place a wager at a sportsbook, you are betting against the operator (the “house”). The operator sets the odds, complete with California sportsbook promos, and can adjust them as needed to balance betting action and protect profitability.

📊 How pricing and odds are determined

In prediction markets, contract prices are determined entirely by supply and demand. As users buy and sell positions, prices shift to reflect the market’s collective belief about the likelihood of an event.

Sportsbooks set their own odds using internal models and traders. While lines may move based on betting activity, the operator ultimately controls the pricing.

💰 How platforms make money

Prediction market platforms typically earn revenue through small transaction fees whenever users buy or sell contracts. Sportsbooks profit by including a margin — known as the “vig” — in their odds, which helps ensure they make money regardless of the outcome.

🔄 Trading flexibility and legality

Prediction markets operate more like exchanges, allowing users to buy and sell contracts both before and during events as prices change. This means positions can be closed early if desired. Sports bets are usually placed with the intention of waiting for the final result, though some sportsbooks offer early cash-outs at a premium.

Another key difference is legality. Trading event contracts is currently permitted in California, while traditional sports betting remains illegal. Even so, prediction markets still cover familiar sports outcomes, such as the Super Bowl winner or the top scorer in the FIFA World Cup.

What prediction markets can Californians trade?

Californians can trade event contracts on prediction market platforms for all kinds of things. There is significant overlap among the major platforms, but some have their own niche markets, too. Here’s what you can expect:

🏈 Sports prediction markets

Sports prediction markets are very popular. Since legal sports betting still isn’t available in California, platforms attempt to fill the void by allowing you to buy and sell contracts for sports events.

Although less detailed, sports prediction markets cover many of the same topics as sportsbook betting lines, including moneylines, point spreads, totals, and props.

For example, a typical market might ask you to answer the question, “Will the Los Angeles Lakers beat the Los Angeles Clippers?” The Lakers have been a significantly better team than the Clippers throughout the 2025-26 NBA season, so the price for “yes” will likely be lower than the price for “no.” This shows that “no” is the more probable outcome.

Best platform for sports predictions

FanDuel Predicts is our top recommended platform for sports fans in California. It does a great job of simplifying the trading process for beginners, and its mobile app is among the best. It also has the same general design as the FanDuel sportsbook, which brings a nice sense of familiarity.