Best Prediction Market Promos for May 2026

What are the best prediction market apps?

As I see it, the best prediction market promos right now come from Polymarket, Kalshi, OG, and Crypto.com. Here's an overview of the different sign-up bonuses available from these industry leaders, and how you can claim them now:

Top prediction market promos reviewed and explained

Nearly all prediction market apps now feature new user promos. Take a look at my top five welcome offers right now, with an emphasis on minimum deposits that earn maximum bonuses.

Kalshi 🟢 - Best array of available markets

Kalshi has been my go-to prediction market app since its 2021 launch. The platform features everything from popular sports to niche events related to politics and pop culture. 

I particularly love Kalshi’s Predictive Insights feature, which provides data-driven probabilities for various events, making it especially useful if you’re looking to go beyond casual trading and make highly informed predictions.

As for the welcome offer, you get a $10 bonus after making a deposit of at least $1 and trading at least $10 in event contracts. You must input our exclusive Kalshi promo code SBR during registration to earn your bonus funds.

You can use the Kalshi promo code in most states, except for a handful of restricted ones. Read our Kalshi review for more information. For a direct comparison between Kalshi and Polymarket, check out our Kalshi vs. Polymarket page. Or, if you'd rather an alternative, take a look at other apps like Kalshi.

Polymarket 📈 - Best overall prediction market app

Getting $50 in bonus funds just for making a deposit of $20+ and inputting the Polymarket promo code SBR provides unrivaled value.

While the bonus is excellent, my favorite feature of Polymarket is its infrastructure. The platform runs on the Polygon blockchain and uses USDC for all transactions. Fees are close to negligible, and there’s no standard trading fee, with only a 0.01% fixed charge on taker orders.

While Polymarket isn’t particularly bonus-heavy, it does offer something called Liquidity Rewards, which rewards users who provide liquidity and keep certain markets active.

The platform provides deep market coverage, especially in politics, global affairs, and other non-sports markets. You also won't find any trading size limits, which gives experienced traders more room to operate.

For more information about this platform, check out our full Polymarket review.

If you're looking for other apps like Polymarket, we have some good suggestions. 

OG 🅾️ - Best for trading on sports

OG is offering a $100 welcome bonus to new customers who complete specific trading milestones. You'll get the first $10 after making any trade of $10 or more, but the whole $100 bonus requires $500+ of trades in the first seven days. 

Only trades using your cash balance count towards the bonus, so you can't use any bonus funds towards the next round of trading. Check out additional details on our OG promo code page. 

Crypto.com 🪙 - Best for cryptocurrencies

Crypto.com is available in most states, offering $50 in bonuses for signing up and referring friends to the platform. No Crypto.com promo code is needed to land this offer.

There are plenty of markets to choose from, including the NBA, MLB, NHL, and European soccer leagues. However, where Crypto.com separates itself is in the number of available cryptocurrencies for purchase and redemption.

The platform allows users to make purchases with over 400 cryptocurrencies and fiat options. This makes it one of the most easily accessible platforms in the industry.

Underdog 🐶 - Best for variety

Underdog is probably best known for DFS and Pick 'Em style games, but the platform also has a predictions platform available in 32 states. This gives users in states like California and Texas, where traditional sportsbooks aren't available, the opportunity to enjoy Underdog and make predictions for various sporting events.

There are available markets for over 20 sports, including big ones like the NFL and MLB, and niche ones like esports. And right now, new users who sign up and use the Underdog promo code will be able to play $5 and get $50 in bonus funds.

Other prediction market platforms

While we've highlighted our top five prediction market promos, we also recommend checking out the Coinbase promo code, Gemini predictions promo code, Sleeper Markets promo code, Fanatics Markets promo code, FanDuel Predicts promo code, and DraftKings Predictions promo code.

Which prediction market app has the best promo?

The best prediction market welcome bonus comes from Polymarket promo code SBR. Simply sign up for the platform and deposit $20, and $50 in bonus funds will be added to your account.

How we rate and review prediction market promos

We carefully analyze each platform and its best promos, focusing on both the overall value of the offer and the quality that the given prediction app can provide in the long run.

Here’s a more detailed breakdown of what we look at:

• Bonus value: The overall value of the bonus plays a big part in how we judge it, but it's not the only thing to consider. Still, $100 is more than $20, and that still matters.
• Spending/Trading Requirements: Aside from the bonus value, the next important factor to consider is deposit or trading requirements. For example, a $50 bonus that only requires you to trade $10+ might actually be better than a $100 bonus that requires you to trade $100 or more.
• Market depth: A good sign up promo is only meaningful if the platform gives you a diverse range of markets to use it on. We evaluate coverage across sports, politics, finance, and real-world events to see if you have enough trading options.
• Platform fees: Expenses matter more than bonuses, so we always emphasize the total cost of participation over any single promotional perk.
• Banking structure and trading limits: Deposit and withdrawal flexibility, speed, supported currencies, and trading caps are all considered.
• UX and beginner-friendliness: We assess how intuitive the platform is from sign up to trade execution, ensuring that newcomers can take full advantage of the promos and features without getting lost.

How prediction market promos differ from sportsbook bonuses

Prediction market bonuses are structured quite differently from the ones you'll find on your favorite sportsbook app.

Since prediction platforms don’t run on fixed odds and use probability-based contracts instead, prices can shift more dramatically, effectively creating a very different environment for promotions.

You won’t see typical odds boosts or bonus bets, and nearly all prediction market promos require placing a deposit and making an initial trade. Platforms like Polymarket even offer incentives for providing liquidity and keeping markets active, which is something that simply doesn’t exist in a sportsbook setting.

Another distinction lies in market eligibility. Sportsbook bonuses are sometimes tied to specific markets or events, with additional terms like minimum odds requirements and rollover. In contrast, prediction market bonuses are often applied to all markets without any demanding wagering requirements.

Trading mechanics matter as well. Bonuses in prediction markets often require you to actively trade or maintain positions rather than simply placing a single wager. This aligns the promo with the platform’s goal of encouraging engagement and liquidity, making the reward more about learning and participating than chasing a one-off payout.

That said, prediction market promos tend to be smaller at face value, usually applicable to smaller beginner trades. While a sportsbook like BetMGM covers your first wager losses up to $1,500 in bonus bets, the best you can hope for at trading platforms is a first-trade match up to $25.

Are prediction market promos legit & legal?

Most U.S.-based prediction markets are CFTC-approved, which provides an extra layer of regulatory oversight and helps ensure fair play. However, promo availability often depends on user location.

The best way to determine a bonus's legitimacy is to check that the platform has provided details on promo eligibility, minimum deposit, trade limits, maximum bonus, expiration dates, and more.

I also recommend looking into a platform's reputation. Established names like Kalshi, Polymarket, and DraftKings are widely recognized for compliance and operational reliability. They also offer clear settlement rules, so you always know how your trades and rewards are calculated and paid out.

Understanding the value of prediction market promos

Don't just chase the headline number of a promo. $25 might look better than $10, but that’s only part of the picture. It’s important to consider how easy the promo is to claim, whether it comes with restrictive conditions, if certain markets are excluded, and how fees and platform mechanics affect the overall benefit.

The best value comes from a platform that's easy to use, offers good liquidity across markets, and keeps costs low, with the promo simply adding a little extra incentive to get started. The bonus at OG.com, for example, is relatively easy to claim. You get half of it just for creating your account and verifying your contact details. 

Prediction market promos and market liquidity

Even if a promo comes with no market restrictions, it won’t be very useful unless there’s sufficient liquidity to keep trades flowing.

You’ll have no issues with high-liquidity markets, where trades are executed quickly, prices are adjusted smoothly, and your promo credits can be used effectively to enter and exit positions without unexpected slippage.

Low-volume markets can limit how much you can trade with a given promo, with some trades remaining dormant for a long time (if they fill at all), making it harder to capitalize on the promotion.

Choosing a platform based on promo structure

Welcome promos are a great way to get traders in the door, but available markets, trade volume, regulatory standards, and more should all factor into your registration decision.

To choose the best prediction platform for you, visit our page highlighting the best prediction market apps and learn more about all that the predictions industry has to offer.

Who prediction market promos are best for

Since the prediction market is still relatively new, most of the platforms use promos to target beginners. If you’re new, they will provide you with a low-risk way to test the waters, learn trading mechanics, and experiment without putting too much of your own money on the line.

The promo credits can also be effectively used to hedge (take an opposing position on an outcome) and offset risks or to explore alternative markets that might otherwise be avoided.

When prediction market promos may fall short

Prediction market promos aren’t perfect for everyone. Sure, they can be a great way to get started, but probability-based trading can feel tricky for beginners, and if you're not careful, you can easily see your bonus funds go down the drain.

They are also generally not designed for serious traders chasing large payouts. The bonuses are relatively small and won’t make a meaningful impact on high-stakes positions.

Additionally, some promos may come with market-specific constraints, limiting which contracts you can trade or how much bonus credit you can use at once.

How to use a prediction market promo responsibly

You should keep in mind that these bonuses are primarily designed to help you explore a given platform, so treat them as learning tools rather than guaranteed profit.

Bonus or no bonus, understanding probabilities and pricing mechanics is essential before you jump into the prediction market game. Every contract reflects the market’s current estimate of an event’s likelihood, and prices fluctuate in real time as others make trades. Therefore, always take the time to learn how positions gain or lose value before committing your bonus funds.

Finally, avoid overspending your promo on high-risk trades just to maximize it. It’s much smarter to use it on small trades across different markets to test strategies and learn the nature of liquidity, fees, settlement rules, and other mechanics.