Best payout slots online 🎰 May 2024

Marching Legions


Top rated high payout slot:

  • RTP: 98.12%
  • Max win: 10,000 x stake
  • 243 ways to win

Our recommended US slot sites

Disclaimer: We have noticed you are visiting this page from outside of the relevant state, you may not be able to access the partners on display

Rank Casino Bonus Offer Main points Play Online
#1 Top Rated Casino
us flag
  • Exclusive promo code: CORGBONUS
  • Win cash prizes on the MCJACKPOT
  • Transfer your VIP level to McLuck
us flag
  • Accepting US players
  • Over 300 slot games
  • 24/7 Customer Support
us flag
  • Use Exclusive Promo Code: CORGBONUS
  • Pragmatic Jackpot Play + Over 700 Slots Games
  • Free Daily Coins Reward

The 10 best payout slots for May

If you’re looking for slots with great graphics, bonus features, and plenty of opportunities to win big, these are the top ten slots for you.

Slot Name Provider RTP (%) Max win (per spin)
Ugga Bugga
1,000 x stake
Book of 99
Relax Gaming
5,000 x stake
1429 Uncharted Seas
670 x stake
Marching Legions
Relax Gaming
10,000 x stake
Blood Suckers
1,014.6 x stake
Tombstone R.I.P
Nolimit City
300,000 x stake
Starburst XXXtreme
200,000 x stake
Money Train 4
Relax Gaming
150,000 x stake
San Quentin xWays
Nolimit City
150,000 x stake
Robin Nottingham Raiders
Peter & Sons
121,500 x stake
Editor's note

The slots in the table above are picked by experts and updated regularly. To choose them, we look at a set of 10+ data points, including RTP, maximum win amounts per spin, hit frequency rate, volatility, bonus features, graphics, and overall entertainment. Bookmark this page and, if a new high payout slot launches, you’ll be the first to know.

Best RTP slots to play

We’ve rounded up our top five slots with the highest RTP rates. From a range of leading providers and with unique features, find out what makes them a great choice below.

1. Ugga Bugga – 99.07% RTP

Ugga Bugga slot screenshot

The Ugga Bugga slot by Playtech has an unconventional layout of 10 reels, 1x3 in size. Each reel has its own payline too, so you essentially get 10 chances to land a winning combination on each spin. It also comes with a hold and spin feature and a tribal mask wild symbol. Naturally, the main attraction here is the fact it boasts an unprecedented RTP rate of 99.07%.

💡 Editor’s insight: Although Ugga Bugga tops all of the highest RTP slots lists, it’s not an attractive game. It now looks dated and, with max wins of only 1,000 x your stake, we suggest opting for another high RTP game instead.

📈 RTP rate
💰 Max win
1,000 x stake
🎯 Hit frequency rate
Not provided

2. Book of 99 - 99% RTP

Book of 99 slot screenshot

Created by Relax Gaming, Book of 99 launched in 2021 and has an ancient Greek theme. Played over five reels with 10 paylines, the game centers around the free spins feature. As the name suggests, this uses a ‘Book of…’ mechanism, providing you with expanding symbols, unlimited retriggers, and of course, a 99% RTP rate.

💡 Editor’s insight: Book of 99 would be a playable slot even without the super RTP rate. While the graphics aren’t up to Relax Gaming’s usual standards, the slot stands out from the ‘Book of…’ crowd thanks to a collection feature. With this, you can collect wilds in the base game to trigger free spins.

📈 RTP rate
💰 Max win
5,000 x stake
🎯 Hit frequency rate

3. 1429 Uncharted Seas - 98.5% RTP

1429 Uncharted Seas slot screenshot

One of the best-looking games on this list, 1428 Uncharted Seas by Thunderkick comes with five reels, 25 paylines, and a pirate theme. Besides a generous 98.5% RTP rate, the slot also offers expanding wilds in the base game and a free spins feature. Trigger the latter and you can grab up to 100 free games.

💡 Editor’s insight: I’m a big fan of 1429 Uncharted Seas and I love the design. Although the max wins are limited (670 x stake per spin), it’s a low variance game with a high hit frequency rate. This makes it perfect for players who want to play for longer.

📈 RTP rate
💰 Max win
670 x stake
🎯 Hit frequency rate

4. Marching Legions - 98.12% RTP

Marching Legions slot screenshot

The second Relax Gaming title on this list, Marching Legions is a Roman themed slot with quirky pixelated graphics – a little like Minecraft. Played over five reels with 243 ways to win, it also offers respins, a nudge feature, and a free spins round. The legionnaire symbol also appears stacked, which can lead to sizeable wins.

💡 Editor’s insight: With an impressive RTP rate of 98.12% and 10,000 x bet max wins, Marching Legions is one of the best payout slots around. It’s also fun and visually great, although it is quite volatile.

📈 RTP rate
💰 Max win
10,000 x stake
🎯 Hit frequency rate

5. Blood Suckers - 98%

Blood Suckers slot screenshot

Although Blood Suckers came out way back in 2009, it’s become something of a classic. Created by NetEnt, this vampire themed title boasts five reels, 25 paylines, and two bonus features. In the Vampire Slaying bonus feature you must choose a coffin to reveal an instant cash prize, whilst the free spins round carries a 3x multiplier. This is your best chance at unlocking bigger wins.

💡 Editor’s insight: Blood Suckers is a cult slot for a reason. The 98% RTP combines with a decent max win limit, a low volatility, and a 44.9% hit rate to create a top paying online slot. Thanks to these stats, however, most US casinos don’t allow Blood Suckers wagers to contribute towards wagering requirements.

📈 RTP rate
💰 Max win
1,014.6 x stake
🎯 Hit frequency rate
Not provided

Highest paying slots by max win

As we noted earlier, you can categorize high paying slots in a number of ways. Below, we've rounded up the top five titles with staggeringly high max win amounts. Each can pay over 100,000 x your stake per spin.

1. Tombstone R.I.P - 300,000 x stake

Tombstone R.I.P slot screenshot

Perhaps one of the scariest slots ever, Tombstone R.I.P offers max wins of 300,000 x your stake per spin. Created by Nolimit City, it comes with five reels, 108 paylines, and a gory Wild West theme. Bonus features include xNudge Wilds, xSplit Wilds, Reel Split Wilds, and two free spins features.

💡 Editor's Insight: Tombstone R.I.P is not for the faint-hearted, both in terms of the graphics and gameplay. The slot's volatility has been rated 'insane' by Nolimit City themselves, and some might find the gruesome murders and hangings a little gratuitous. If you're not squeamish, however, we recommend letting the carnage (and big wins) commence.

💰 Max win
300,000 x stake
📈 RTP rate
🎯 Hit frequency rate

2. Starburst XXXtreme - 200,000 x stake

Starburst XXXtreme slot screenshot

Based around the incredibly popular Starburst, Starburst XXXtreme ups the ante, offering 200,000 x stake max wins. Created by NetEnt, of course, the slot also comes complete with five reels, nine paylines, and Starburst Wilds with added multipliers. The bright space theme looks as appealing as ever too.

💡 Editor's insight: The key to reaching those eye-watering max wins is to land multiplier Starburst Wilds. Alone, these can carry multipliers worth up to 150x, but they also combine to reach a total multiplier of 450x.

💰 Max win
200,000 x stake
📈 RTP rate
🎯 Hit frequency rate

3. Money Train 4 - 150,000 x stake

Money Train 4 screenshot

The last and the highest paying in the Money Train series, Money Train 4 is a grid slot with attitude. Played on a 6x6 grid with a scatter pays mechanism, it has a high volatility, three bonus features, and you can win up to 150,000 x your stake on every spin.

💡 Editor's insight: Money Train 4 is one of the best slots I've ever played. The graphics are great and the features work together to create those huge wins. I didn't think Relax Gaming could top Money Train 3, but they have! Hats off to them.

💰 Max win
150,000 x stake
📈 RTP rate
🎯 Hit frequency rate

4. San Quentin xWays - 150,000 x stake

San Quentin xWays slot screenshot

Another Nolimit City title, San Quentin xWays is set within the prison of the same name in California. The slot has five reels, 243 regular ways to win, and uses the provider's xWays mechanism. Razor Split symbols can give you up to 13,189,257,216 ways to win too, whilst the Lockdown Spins feature offers multipliers worth up to 512x.

💡 Editor's insight: If Tombstone R.I.P gave you the heebie jeebies, then we recommend this Nolimit City title instead. The max win amount is slightly lower, but the volatility is still 'insane' and the graphics are somewhat more palatable.

💰 Max win
150,000 x stake
📈 RTP rate
🎯 Hit frequency rate

5. Robin Nottingham Raiders - 121,500 x stake

Robin Nottingham Raiders slot screenshot

Created by Peter & Sons, Robin Nottingham Raiders is a high volatility slot with five reels and 20 paylines. It has a cartoon design, in a classic Peter & Sons style, a wild symbol collection feature, and a free spins round. To achieve the max win of 121,500 x your total stake, you need to land a screen full of wild symbols, plus a 243x multiplier.

💡 Editor's insight: With a hit frequency rate of 25.46%, wins are pretty regular despite the volatility. That said, the chances of landing the max win are 1 in 249,999,999. That's a lot of spinning.

💰 Max win
121,500 x stake
📈 RTP rate
🎯 Hit frequency rate

The biggest progressive jackpot slots

Finally, some would argue that progressive jackpot titles are the best payout slot machines. This is quite simply because you can win huge amounts of money from a single spin. Discover some of the highest paying jackpot slots below.

1. Mega Moolah

Mega Moolah slot screenshot

Often called the "millionaire maker", Mega Moolah is a classic progressive jackpot slot by Microgaming. With a safari theme, it boasts five jackpot prizes. The highest of these is the Mega Jackpot, which seeds at $2 million and is won every 8 weeks on average.

💡 Editor's insight: Microgaming has expanded its Mega Moolah jackpot network to include over 15 slots. This means you can play slots with different themes whilst competing for the same Mega Jackpot prize.

🤑 Mega Jackpot seed amount
$2 million
🏅 Biggest win ever
💰 Max payout (excluding jackpots)
1,955 x stake

2. Mega Fortune

Mega Fortune slot screenshot

Created by NetEnt, Mega Fortune is a progressive jackpot slot with a luxury theme. The trappings of wealth are a bit on the nose, but the three jackpots on offer are not to be sniffed at. The biggest seeds at $150,000 and this is typically claimed every 105 days.

💡 Editor's insight: Even if you don't manage to grab a jackpot prize, Mega Fortune has a decent math model. With a low volatility, a 96.6% RTP rate, and 2,162 x stake regular wins, it's still worth a spin.

🤑 Mega Jackpot seed amount
🏅 Biggest win ever
💰 Max payout (excluding jackpots)
2,162 x stake

3. Age of the Gods

Age of the Gods slot screenshot

Created by Playtech in 2016, Age of the Gods is still an exciting progressive jackpot title. With 4 reels and 20 paylines, the jackpot round is triggered randomly but, once in, you're guaranteed a prize. The Ultimate Power jackpot is the one you want, seeding at $100,000.

💡 Editor's insight: Although Playtech now boasts a wide range of Age of the Gods slots, I still find the original title the best. The graphics look a little tired, but there's max regular wins of 50,000 x your stake to aim for too.

🤑 Ultimate Power Jackpot seed amount
🏅 Biggest win ever
💰 Max payout (excluding jackpots)
50,000 x stake

New and upcoming high payout slots

As software providers are always releasing new slots, we've searched high and low for the best paying slots of 2024. Below, you can find newly released high RTP slots and progressive jackpots, as well as upcoming releases from our favourite providers.

  • Fire in the Hole 2 by Nolimit City (65,000 x bet max wins)
  • Kenneth Must Die by Nolimit City (69,000 x bet max wins)
  • Space Miners Dream Drop by Relax Gaming (Progressive jackpot)
  • Trigger Happy by Big Time Gaming (50,000 x bet max wins)
  • Colt Lightning Firestorm by Play'n GO (50,000 x bet max wins)
  • Sugar Rush 1000 by Pragmatic Play (97.5% RTP)
  • Cash Truck 3 by Quickspin (40,000 x bet max wins)
  • 4 Fantastic Fish Gold Dream Drop by Relax Gaming (Progressive jackpot)
  • Break Da Bank Again Mega Moolah by Games Global (Progressive jackpot)

What is RTP?

RTP, or return to player, is a key metric in the world of slot machine payouts. It represents the percentage of all wagered money that a slot will pay back to players over time.

Simply put, the higher the RTP, the better your chances of winning in the long run. For instance, a slot with an RTP of 95% will, theoretically, return $95 for every $100 wagered.

It's important to know that the RTP rate doesn't mean you will definitely get $95 back for every $100 you wager. After all, if that were true, how would US online casinos make money? RTP is a theoretical value, calculated over millions of spins.

Keep in mind that individual gaming sessions can vary widely from this average due to the randomness of slot outcomes. For instance, if you wager $100 and lose everything, your personal RTP rate is simply 0%. Winners, on the other hand, could have a personal RTP rate of 200%.

When hunting for the best slot machine payouts, you can prioritize games with higher RTPs, though this isn't the only thing to look out for. In the following sections, we look at the connection between RTP rates and other slot stats.

⚖️ RTP and volatility

An online slot's RTP and volatility are connected. Volatility measures the risk associated with playing a slot. High volatility slots tend to offer larger payouts but less frequently, while low volatility slots provide more frequent but smaller wins.

High volatility slots, therefore, are riskier as your bankroll can be swallowed up before you even land a win. That said, the payout from a single spin can be worth waiting for.

🎯 Does hit frequency matter?

Hit frequency refers to how often a slot machine pays out wins. Hit frequency rates are shown as percentages, for example 25%. A 25% hit frequency rate means that every one in four spins will be a winner.

While hit frequency may seem crucial, especially when searching for the best paying slots, it doesn’t directly impact a game’s RTP or overall profitability. This is because one sizeable win can be worth a lot more than 20 wins from another slot.

🤑 Jackpot slots and RTP

When searching for the highest payout slots, it might seem tempting to play progressive jackpot slots, due to their massive potential payouts. However, their RTPs are often much lower. This is because a portion of each wager contributes to the jackpot.

For instance, Mega Moolah has an RTP rate of 93.42%. 88.12% is for the slot without the progressive jackpot, whilst 5.3% for what you wager goes towards the progressive jackpots.

How to find high paying slots

Besides using pages such as this one, there are a few things you should pay attention to if you want to find high paying slots. Below, our experts share a few ways you can find out whether a new online slot is worth it:

  • Prioritize games with generous RTPs, typically above 96%
  • Always check the paytable for the maximum amounts
  • Look for slots with features like progressive jackpots, lucrative bonus rounds, and high volatilities, as these tend to offer the chance for significant wins
  • Keep an eye out for our reviews and recommendations to identify video slots with high payouts
Editor's tip - avoid branded slots

Slots based around movies, TV series, or celebrities often have lower RTP rates to offset the licensing costs. For instance, the fairly recent The Goonies Hey You Guys slot by Blueprint Gaming has a minimum RTP of just 93%. Avoid branded slots and look out for originals instead.

How to find the RTP rate of a slot

Licensed and trustworthy slot providers are required to provide the RTP rate of their slots to players. This information must be easy to find and clear. As such, you can usually find the RTP rate in the paytable. Alternatively, the casino might have a dedicated page to listing slot RTP rates.

In the US finding RTP rates can be a little more complicated, as sweepstakes casinos do not need to be licensed and so aren't as forthcoming. If you're struggling, follow our simple step-by-step guide.

1. Check the slot's paytable

Open the slot you want to play and open the paytable. You can usually do this by clicking the '?' or 'i' button. The RTP may be listed in the paytable itself or the help section.


    2. Read our expert slot reviews

    In all of our slot reviews, we list the games' RTP rate, alongside other important facts. In addition, we give our expert verdict to save you time and money.

      3. Look at the software provider's site

      Software providers also list the RTP of their slots online. Once a slot launches, simply go to the software provider's website to find it.


        4. Check auditor reports

        If you're still stuck, the next step is to check the auditor's reports. Third-party testing agencies such as eCOGRA inspect online casinos to make sure their games are fair and random. You can find the audit results on the casinos’ websites.

          Do RTP rates change from site to site?

          Whilst a slot's RTP rate shouldn't really change depending on where you play it, some slots providers do offer casinos a range of different RTP rates to choose from. For instance, NetEnt creates four different RTP versions of its slots. The casino is then free to pick whichever version of game they want. Unfortunately, a lot of online casinos in the US now choose the lower RTP versions.

          High payout slots and casino bonuses

          As you probably know, slot sites offer casino bonuses to new and existing players. These come with several terms and conditions, including wagering requirements.

          Wagering requirements are the number of times you need to wager the bonus before you can withdraw. They're usually listed as a multiplier, e.g. 30x. If you claim a $20 bonus, therefore, you must wager $600 (20 x 30) before you can cash out.

          Playing high RTP slots can make it easier to clear wagering requirements. You can wager the same amount of cash but you can expect a higher return. To avoid this, online casinos often exclude certain slots from bonuses. Blood Suckers by NetEnt is a common example.

          Always read the small print before opting in for a bonus. If you know you want to play high payout slots, it might be worth not claiming the bonus altogether.

          Where to play the best payout slots

          So, you now know which slots are most likely to win the most, but where should you play them? At, we've reviewed and rated hundreds, if not thousands, of US online casinos. This includes both sweepstake and real money sites.

          We review all sites using our 25-step rating process, which looks at a range of criteria including slot libraries, fairness, and bonuses. With our help, you can find truly great and trustworthy slot sites.

          Browse the list below to find a great slot site now, or read on to find out what we look for when rating sites.

          The best US slot sites for 2024

          Slot site Welcome bonus No. of games Payout rate Play now
          Exclusive Offer: 107,500 Gold coins & 35 FREE Sweepstakes coins
          WOW Vegas
          1.5 million WOW Coins + 35 Free Sweepstake Coins
          Hello Millions
          245,000 Gold Coins + 117.5 Free Sweepstakes Coins
          High 5 Casino
          5 Sweeps Coins, 250 Game Coins, and 600 diamonds
          $ 25 Free Stake Cash + 250,000 Gold Coins
          Fortune Coins
          20,000,000 Gold Coins + $50 Of FREE Coins
          Get up to 367,000 Gold Coins + 32.3 FREE Sweepstakes

          Unlimited free chance to win BTC/ETH/USDT
          Get 400,000 Coins + 1,000 FREE Entries
          30,000 Gold Coins + 2 Sweepstakes Coins Free + 20 Free Spins Upon Sign-Up

          How we find the best slot sites

          Our in-depth rating process dives deep into a slot site so you don't have to. Our team registers at the site, makes a deposit, and plays the slots. We look for sites with extensive slots libraries with games from the best providers, plus fair bonuses for slots players like free spins.

          The site must also be easy to use, offer an array of payment methods, and be completely mobile friendly. It's this process that allows us to guarantee these are the best slot sites for US players. Check out the importance we place in each area below.

          How we rate slot sites at

          Expert tips for playing high payout slots online

          If you've got to this point of the page, chances are you're now a bit of a high payout slots expert yourself. To boost your knowledge further, always remember these top tips from our slots specialists.

          • Check the RTP rate and stats

            Always look for slots with RTP percentages of 96% or higher, as these generally offer better payouts in the long run. You should also consider the hit frequency rate and the max win amount.

          • Play the max bet (if possible)

            Some high payout slots offer larger payouts or progressive jackpots when you bet the maximum amount. If your budget allows it, consider playing max bet to qualify for bigger prizes

          • Play demo versions first

            Most online casinos offer demo versions of their high payout slots. Take advantage of these to familiarize yourself with the game and its mechanics before risking real money. You can also play free slots here at

          • Manage your bankroll

            Before you start playing, set a budget and stick to it. High payout slots can be enticing, but they can also eat up your bankroll quickly if you're not careful.

          • Check the bonus T&Cs

            As high RTP slots might not contribute to wagering requirements, it's always important to read the small print. Make sure you can play high RTP slots with your bonus or consider avoiding the bonus in favour of playing the games you love.

          • Follow jackpot trackers

            If progressive jackpots are your thing, make sure to follow online jackpot trackers. These trackers combine information from various online casinos to give you real-time updates, and historical data. They can even tell you when the jackpot is likely to drop.

          • Keep your emotions out of it

            Don't let emotions dictate your gameplay. Stay calm and focused, even during winning streaks, to make rational decisions about your bets.


          As an avid slots fan, my best tip is to follow software providers on social media. They usually leak details about new slots before anyone else, and can provide you with the payout data you need.

          Daisy Harrison

          Should you pay attention to slot machine payouts?

          Yes, it's definitely beneficial to consider payouts when choosing which slot to play. Focusing on stats like RTP rates and max win amounts can help you maximize your wins, but it's important to put everything into perspective.

          Although it can be tempting to only play high payout slots, the outcomes of each game are always random. For this reason, I think it's important to consider other factors too. The slot's theme, bonus features, and animations are all equally important. Enjoy the thrill of each spin and don't get too weighed down by the numbers.

          What is the standard payout for slot machines?

          Online slot machines have a standard payout of around 96%. However, in recent years this has dropped to around 94%. Remember that these payout rates are theoretical, based over millions or billions of spins.

          What slot machine has the best payout odds?

          The slot machine with the best payout odds is Ugga Bugga by Playtech. It has a 99.07% RTP rate, although it's not available at many casinos. Other high payout slots include Book of 99 (Relax Gaming), Mega Joker (NetEnt), and 1429 Uncharted Seas (Thunderkick).

          How do you pick a winning slot machine?

          To pick a winning slot machine you can consider various stats such as RTP rate, max win amount, and hit frequency rate. However, it's important to remember that these stats are based on averages. Your personal rates may vary.

          What are the best RTP slots?

          Any slot with an RTP rate of 97% or higher is considered a high RTP game. Check out our list of the 5 best RTP slots which features the likes of Book of 99 and Marching Legions.

          How do you know if a slot machine is hot?

          Unfortunately, there's no way to tell if an online slot machine is hot. Online slot machines payout at random, and spin outcomes are selected by a RNG (random number generator). This makes online slots fair for all players, so it's not a bad thing.


          Written by Daisy Harrison

          Badge verified
          Content Editor

          A slot fanatic, Daisy Harrison boasts over 9 years of experience writing about online casinos and games. Having worked with both providers and players, she knows what makes slots stand out from the crowd, and where to find them. At, Daisy is on a mission to share her expert slots knowledge.