Best Prediction Market Promos and Sign-Up Offers

Prediction market promos can vary greatly from platform to platform. That's why our team of SI prediction experts has tested all the best prediction market welcome offers and ranked our top choices for trading flexibility, ease of use, and overall value.

This way, you can decide which bonus works best for you and get started with a new prediction market promo today.

My reviews of the best prediction market promos will help you find easy-to-use trading bonuses, higher-valued referral offers, and bonuses you'll be able to clear simply by completing your first few trades on prediction markets. 

I'll also review the best trader fits and top features for each bonus offer. Discover the prediction promo that suits you best, then get started claiming today.

1. Kalshi promo - Best prediction market promo for mobile trading
2. Polymarket promo - Best prediction market promo for versatile traders
3. OG.com promo - Best prediction market promo for sports trading
4. Crypto.com promo - Best prediction market promo for referrals

Kalshi offers an extremely easy way to earn $10 in bonus credit on its industry-leading prediction market app, making this a great promo to target mobile traders. To unlock this offer, complete the sign-up process using promo code SIBONUS, deposit $1+, and complete $10+ in trades. 

My take on the lower value of the Kalshi promo offer? They're confident that their product will do the talking. The hassle-free bonus is still enough to let you test their world-class trading app, and I personally found the Kalshi prediction platform to be one of the most intuitive to use, with some of the deepest sports offerings in MLB, NBA, and Golf, whether you're on desktop or mobile. 

Check out the Kalshi welcome bonus now to make your own call on whether it fits the bill as our top promo for mobile event trading.  

Kalshi welcome promo top features 

• Low up front investment — $1+ deposit will get you access
• Great for newbies — free trades let you try out a top-rated mobile trading platform
• Long expiry date — up to 30 days to use bonus

Kalshi shines with its highly rated mobile prediction app (4.8/5 on the App Store) and real-world event offerings, including political event outcomes such as the upcoming price of U.S. tariffs on foreign countries. However, Kalshi truly excels in sports outcomes, making it one of our top World Cup prediction market apps to check out for soccer's biggest tournament in 2026.

The Polymarket promo code SIBONUS will allow you to claim one of the fairest welcome offers among our top trading apps: a $50 trading bonus unlocked by a deposit of $20 or more on the Polymarket mobile app. The simplicity and higher total value of this promo make it a standout option for us, for all styles of traders, but especially versatile ones who value variety. With Polymarkets' deep real-world offerings, you'll be able to use your bonus to trade sports in niche markets like the UFC and PGA Golf, while also buying event contracts on elections and awards.

Just complete your registration with promo code SIBONUS and make your first deposit of $20+. Then you'll be free to start choosing from one of the deepest selections of real event trading markets in the world.

Polymarket welcome promo top features 

• Simple to claim — unlocks with just a $20+ deposit
• High flexibility — use it to trade on anything (sports, politics, and crypto)
• No strings attached — easy to clear 1x wagering requirement

Once on Polymarket, you can access long-term prediction contracts on major sporting events, such as Super Bowl 61, as well as short-term contracts, such as Bitcoin price discovery over five-minute intervals. Polymarket also has a solid selection of niche sports markets, including Formula 1, Rugby, and Boxing. 

OG.com offers a welcome bonus of up to $100 for new users. From a value perspective, the bonus is ideal for sports-focused traders accustomed to larger signup bonuses from traditional sportsbooks, who still want high-level game and player markets to trade on. 

The OG promo code requires a multi-step process to access the full bonus amount, but the milestones won't be onerous for frequent sports traders, thanks to OG's focus on event contracts for MLB, the NBA, and other major sporting leagues. Additionally, I liked that OG.com unlocked portions of the bonus after certain milestones were hit, so anyone who doesn't have the bankroll to reach $500 in settled trades will still get a piece of the reward.

• Trade and settle $10: Unlocks $10
• Trade and settle $100: Unlocks $15
• Trade and settle $250: Unlocks $25
• Trade and settle $500: Unlocks $50

OG.com welcome promo top features

• High value offer — largest total value among our featured welcome offers
• Straightforward terms — milestones are clear, well-laid out, and can be unlocked in minutes
• Social rewards — signing up will allow access to OG leaderboards and rewards

OG.com is one of the best prediction market sites for leaderboards, social integration, and sports trading. They offer event trading on all sorts of real-world events, including the 2028 presidential election, but sports are always a major focus on their homepage. Find out for yourself by claiming the OG offer today.

With the Crypto.com referral code, you can earn a $50 bonus in CRO (Cronos), the site's native cryptocurrency, just for signing up through one of our links. Plus, you can earn up to $2,000 USD in CRO and 50% of your friend's trading fees, for a limited period, when your friend signs up using your unique referral link. 

How much you can earn with the Crypto.com referral code depends entirely on how much CRO your friend stakes.  

Claim up to a $50 bonus today, and get access to Crypto.com's referral bonus and a prediction market platform that will allow you to trade on sports, crypto, and more.

Crypto.com referral code top features 

• Higher value offer — referral offer allows for larger, long-term earnings
• Scaling opportunity — earn more through frequent referral stakes or trades
• Crypto-focused — rewards provided in native CRO, which can be used for staking or trading on the exchange

Crypto.com is the premier landing spot for real-world event traders who want to trade sports and cryptocurrency on their phones (over 400+ cryptocurrencies supported). Its mobile prediction platform has easy-to-read event contracts, with implied probabilities for each game clearly displayed on the app.

The leading prediction apps typically offer new users promos that include small amounts of bonus money or site credit after they complete registration, and make their first trade or deposit. In general, prediction promos have very simple terms and can often be cleared quickly, allowing users to try event contract trading with the aid of some site credit.

This differentiates them from the welcome bonuses offered by larger sportsbooks that try to impress with big totals but are often tied to difficult terms or confusing conditions. 

Here are the most common forms of prediction market promos for event trading right now. 

🎁 Deposit matches

A simple promo structure that asks you to deposit a certain amount, which will then be matched in cash or site credits. Polymarket currently has the highest-value deposit match on the market, with a 'Deposit $20+, get $50' match offer. 

↔️ Trade and get

A trade-and-get offer requires users to make a deposit and complete their first trade to unlock a bonus. While these offers do require an extra step, the rewards can often be larger than simple deposit matches. Kalshi has a very simple trade-and-get offer, where users get $10 after completing a $10 trade. 

🪜 Laddered promos

Laddered promos are promos whose value increases as you complete certain steps or milestones. With a laddered welcome promo, a site increases the value of your offer as you complete specific tasks or stages. Both Crypto.com and OG.com feature laddered welcome promos, with OG.com offering up to $100 in bonuses after users settle trades up to $500. 

Prediction market promos are a valuable tool for anyone who wants to start trading on sports or real-world events. They are almost always easy to claim and offer a helping hand on your first trade or two as you try out apps like Kalshi and other platforms.

Most traders who benefit from prediction promos will be new users trying out prediction trading for the first time, or potentially comparing new sites. However, other specific traders can benefit from prediction market promos as well, including:

• Traditional sports bettors who want to speculate on real-world events such as politics or finance. 
• Sports bettors who want to benefit from the no vig/low fee model of prediction markets.
• Event contract traders who want access to site-specific markets, such as politics or geopolitical event trading (war, diplomacy, etc) on Polymarket.
• Traders wanting an alternate platform for hedge trading purposes, or for trading crypto assets specifically.
• Anyone who wants to speculate on sports such as MLB or the NFL and lives in a state where sports betting is banned, such as Texas or California.

Most people will find welcome offers and bonuses on prediction platforms and apps like Polymarket useful. However, there are those who may not find the promos to be much help. 

Since prediction market promos tend to be lower-valued, low-commitment bonuses, anyone seeking to unlock a larger sportsbook-style bonus in their startup may need to reconsider. Prediction market bonuses won't provide you with a large boost, and for traders with a big bankroll, they will hardly register at all. 

Others who not benefit from prediction market promos include:

• Those seeking regular profit boosts for trading. Prediction sites offer little for existing users in this area compared to a sportsbook.
• Anyone who prefers sportbook-style odds to the implied probabilities used in prediction markets.
• Sports bettors who would prefer not to learn about trading and would rather stick with simple sportsbook dynamics, including bookmaker-created odds.
• Bettors who only want access to specific sports and game props and aren't typically interested in speculating on areas outside of sports.

Major prediction market promotions from platforms are generally considered safe and legitimate. Our top-rated prediction platforms, such as Kalshi or Polymarket, are all regulated by federal agencies, including the CFTC, and are designated contract markets.

However, it is important to note that prediction markets do function differently from sportsbooks. Instead of wagers that use odds set by a bookmaker, prediction sites offer financial derivatives that trade event shares priced from $0 to $1 and act as "all-or-nothing" contracts.

This binary payout system means that if you are wrong, you lose the entire value of your trade, making prediction trading very similar to sports betting in many regards, and (overall) riskier than traditional stock investing.

How to tell if a prediction market promo is legit?

Legit prediction market promos (such as those from Polymarket or Kalshi) are usually structured as deposit matches, trade-and-get, laddered rewards, or profit boosts for regulated event contracts. These sorts of promos are often easily verified by checking the site's CFTC registration.

The best prediction market promos are legal. However, the availability of prediction promos depends on the platform's standing as a federally regulated trading site under the Commodity Futures Trading Commission (CFTC).

All of our featured prediction market platforms are legitimate operators, federally regulated to operate in the US, and legal in up to 50 states (although some small state-by-state restrictions may apply). This means that residents of California, Texas, and Florida, where sports betting is not currently legal, can use prediction markets and claim prediction market promos.

Most promos from legitimate prediction market sites are easy to claim and come with clear terms. However, always ensure you review the conditions before claiming.

1. Create and verify your account

Use our reviews to select the best prediction market promo for your style of event trading. Follow the links on this page to sign up on the platform. Complete identity verification (KYC) and secure your account by providing the necessary details, such as name, date of birth, and SSN, to verify your identity and location.

2. Claim the Promo

Enter the current promo code at registration or activate the offer simply by tapping any of the verified links on this page. Read the terms carefully (minimum deposit, wagering requirements, withdrawal restrictions) so you'll be ready to clear the exact steps needed to unlock the full value of your promo.

3. Fund your account

Deposit at least the minimum required amount using your preferred payment method (bank, card, crypto, etc.). Most deposits will be processed instantly, but check transaction times to avoid disappointment. Once finished, if you're claiming a deposit match bonus, confirm your bonus credits have been applied.

4. Place your first trade

Browse the available event contract markets on your site. Select from a variety of options, including sports, real-world events, and currency forecasting. When ready, select a prediction position 'Yes' or 'No', set your trade size, and confirm the order. 

5. Withdraw your winnings

Once the market settles and all promo conditions are met, navigate to the withdrawal page, choose your payout method, and cash out your funds. Be sure to check withdrawal policies and speed before beginning the payout process. 

The best prediction market promos differ from top sportsbook promos in several important ways, with terms and bonus allocation being key differences.

Here’s the main differences to consider when claiming a prediction app promo vs. a traditional sportsbook promo.

Note: We're in the process of acquiring an Underdog promo code.

Prediction market promos expose you to higher-risk binary contracts on platforms, where you can speculate on almost anything. While the offers themselves are a nice starting bonus its still prudent to be mindful when claiming these offers and using prediction market sites. 

Here's my list of tips that will help you use an event contract promo responsibly from the get-go:

📜 Review the terms and conditions

Although they’re easier to claim and often have clearer terms than sportsbook bonuses, prediction market promos can still include fine print that requires you to follow certain procedures closely. Do your own due diligence before you sign up.  

🏦 Only deposit what you're comfortable with

Prediction markets aren't the same as investing. They may present themselves differently from sportsbooks, but binary trading is very similar to placing a sports bet, as you can lose your entire investment on any single trade. Don’t overlook the fact that trading predictions on real-world events carries a lot of risk.

📊 Understand implied probabilities and how trading works

Since they’re not sportsbooks, prediction platforms generally display current prices as percentages that represent the implied probability of an event occurring. Make sure you understand what these percentages represent so you can better interpret price action and historical data, and make smarter trades.

👉👈 Understand the concept of peer-to-peer trading

Unlike sportsbooks, prices on prediction platforms aren’t controlled by bookmakers employed by the site. Instead, price action is driven by the collective buying and selling activity of market participants (traders). Make sure you understand how supply and demand affect the price of an outcome before investing.

💡 Develop a trading plan based on your knowledge base

Keep your world small as you start out. While it will be tempting to invest in the most trending topics, trading in areas you're familiar with will likely lead to better results, at least initially. Avoid FOMO'ing into trades at all costs.