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🔥 Best Paying Slots Based on the Highest RTP

Slot Game RTP Value Game Provider
🎰 Ugga Bugga 99.07% Playtech
🎰 Mega Joker 99% NetEnt
🎰 Ooh Aah Dracula 99% Barcrest
🎰 Jackpot 6000 98.86% NetEnt
🎰 1429 Uncharted Seas 98.6% Thunderkick
🎰 The Catfather 98.10% Pragmatic Play
🎰 Jokerizer 98% Yggdrasil
🎰 Rainbow Riches Pick n Mix 98% Barcrest
🎰 Blood Suckers 98% NetEnt
🎰 Guns N’ Roses 96.98% NetEnt

Players always want the best value for money. Identifying the best RTP slots and understanding how the payout percentage can impact your gambling session can help you adjust your gaming strategy.

Remember that a game’s RTP rating does not guarantee winnings but it can provide an educated guess about your gameplay experience.

At JohnSlots, our team reviews top online gambling sites, casino bonuses, and promotions to help you choose the right new casino based on its offerings and how well it aligns with your gambling style.

High RTP slots are highly attractive and lucrative for players, as they can improve their chances of winning and help them avoid online slot games with less favourable payout rates.

Find out below which online slot games and software developers have the highest Return to Player, and where you can play the best-paying slots in the UK.

1. Ugga Bugga by Playtech – RTP: 99.07%

Ugga Bugga slot from Playtech

RTP: 99.07% | Volatility: Low

Ugga Bugga is an African-themed online slot game released in 2006 by Playtech. It has a unique layout with 3 reels, 10 rows, and 10 paylines where each reel spins independently of the others.

This Playtech slot features tropical fruits, tribal masks, and bongos. Although it has low volatility, it has a high RTP. The Wild symbol is the only bonus feature.

Due to its combination of high RTP and low volatility which make it among one of the best RTP slots it is rare to find Ugga Bugga available to play with real money these days. You can still play our free demo of Ugga Bugga to try it out for fun.

2. Mega Joker by NetEnt – RTP: 99%

Mega Joker slot from NetEnt

RTP: 99% | Volatility: High

With its classic fruit machine style and a progressive jackpot, the Mega Joker slot from NetEnt has been a fan favourite since its release in 2013. Much like the old slot machines, it takes its inspiration from, Mega Joker is fairly simple – 3 reels, 3 rows, and 5 paylines.

However, there’s a lot more to this slot than meets the eye. Aside from the high RTP, it also has a progressive jackpot. And if there’s one phrase that is more exciting to players than ‘high RTP’, it’s ‘progressive jackpot’!

Play at: VideoSlots – This slots website has Mega Joker and much more, and a good welcome bonus on top.

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3. Ooh Aah Dracula by Barcrest – RTP: 99%

Ooh Aah Dracula slot by Barcrest

RTP: 99% | Volatility: Low

We love the catchy title on this Barcrest slot! Ooh Aah Dracula (it’s just so fun to say!) was released in 2015 and features an equally lively soundtrack to match its whacky design.

Built on a 5×3 reel set, this game has 10 bet lines, a medium variance, and free spins, Wilds, and a pick-and-click bonus game. There’s also a high-roller option that triggers 5 spins at the given stake. Though perhaps saying the word ‘stake’ around vampires may be a little insensitive. Considering all of the above, we can say Ooh Aah Dracula is among the best RTP slots out there.

Play at: PlayOJO – You can try out Ooh Aah Dracula as you register and play for real money, or even the free demo from their site.

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4. Jackpot 6000 by NetEnt – RTP: 98.86%

Jackpot 6000 Slot

RTP: 98.86% | Volatility: High

With 5 reels, 3 rows, and a familiar classic slot appearance, Jackpot 6000 may not appear to be all that exciting. But look closer and you’ll notice not just a high RTP but an in-game jackpot too!

The Supermeter feature is where the fun is at. When a win is struck, players are given the option to use those winnings to play the Supermeter, which costs more but can be rewarded with up to 6,000 coins when two jokers land on the reels to reveal a mystery prize.

Play at: Casumo – They have free spins offers and Jackpot 6000 slot available in the game lobby!

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5. 1429 Uncharted Seas by Thunderkick – RTP: 98.6%

1429 Uncharted Seas slot by Thunderkick

RTP: 98.6% | Volatility: Low

Travel back in time and far out to sea with this exploration slot that boasts a high return to player value. Thunderkick has created a unique-looking slot that looks like it is being played across the surface of an old map.

1429 Uncharted Seas has 5 reels and 3 rows, with 25 paylines to aim for. 1429 Uncharted Seas also features free spins and expanding Wilds. All of these features make it one of the best RTP slots available in the market.

Play at: Barz Casino – They have an amazing slot selection and a super nice hybrid welcome bonus that you can grab.

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6. The Catfather by Pragmatic Play – RTP: 98.10%

The Catfather slot screenshot

RTP: 98.10% | Volatility: Low

Ever wondered what it would be like if the mafia was run by cats? You can find out in this quirky slot from Pragmatic Play!

The developer has given us a slot we just can’t refuse with this title. On top of the great payout rate and the crazy slot theme, The Catfather slot has a free spin round, win multipliers, and stacked wilds. See if you have what it takes to win some money from the cat boss!

Play at: MrQ Casino – Not many casinos have this top RTP classic, but we’ve found the one that offers it.

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7. Jokerizer by Yggdrasil – RTP: 98%

Jokerizer slot by Yggdrasil

RTP: 98% | Volatility: High

This top RTP game from Yggdrasil brings classic fruit machines into the modern world, with sharp graphics and exciting features. Jokerizer was released in 2016, so it still looks mighty fresh and its high variance is also appealing.

Built on a standard 5×3 reel set and replete with familiar fruit symbols, Jokerizer changes the game with its Jokerizer Mode and the Mystery Win feature.

Play at: Casilando– They have Jokerizer and a ton of other slots in the game lobby so you’ll never get bored.

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8. Rainbow Riches Pick ‘n’ Mix by Barcrest – RTP: 98%

Rainbow Riches Pick n Mix

RTP: Up to 98% | Volatility: Medium

Rainbow Riches Pick N Mix is a 2016 sequel that offers new bonus features and an RTP of up to 98% due to the Big Bet feature which makes it one of the best RTP slots out there. This feature allows players to increase their wager and activate three bonus features for the next set of free spins.

There are many variations of Rainbow Riches, each with different RTP, in-game features, and variance levels.

Play at: LeoVegas – They offer a wide range of slot games, and they also have Rainbow Riches.

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9. Blood Suckers by NetEnt – RTP: 98%

Blood Suckers by NetEnt

RTP: 98% | Volatility: Medium

Blood Suckers is a popular vampire-themed slot game that was first released in 2013, and it has been followed up by multiple sequels, including Blood Suckers 2 and Blood Suckers Megaways.

This slot game with 98% RTP and medium volatility features creepy Victorian violin music, free spins, and a macabre pick-and-click bonus game where players have to dispatch all the undead to win.

Expect a spooktacular time as you spin your bonus spins and chase vampires for large payouts.

Play at: Betway Casino – People forget that Betway is actually a really good casino with a decent slot selection, it’s not only a sportsbook.

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10. Starmania Slot by NextGen Gaming – RTP: 97.87%


RTP: 97.87% | Volatility: Low to Medium

Starmania is a space-themed online slot game by NextGen Gaming. It has 5 reels, 3 rows, and 10 paylines that pay both ways. It’s one of the best paying slot games with an RTP of 97.87% and you can win up to 1,000x your stake.

Landing bonus scatter symbols can trigger the free spins bonus round. When this happens, you can win up to 20 free spins and play with 30 extra wilds on the three middle reels.

Play at: DreamVegas Casino – Get treated like royalty when you sign up. Enjoy a 100% bonus match on 1st deposit + 150 bonus spins!

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How We Rate Top RTPSlots?

We understand that the RTP is vital for slot players looking for the best value and highest likelihood of winning. Our detailed rating process guides players through selecting top RTP slots that provide exciting gameplay and a higher probability of returns over time.

  1. Initial RTP Verification
    Our team verifies the RTP percentages provided by game developers. We ensure these figures are consistent with those reported by independent auditing bodies.
  2. In-Depth Game Testing
    We play each slot to test the real-world payout performance and see if it matches the reported RTP.
  3. Comparison With Industry Standards
    We compare slots against industry averages and benchmarks. We highlight slots offering the highest RTP.
  4. Player Feedback Integration
    We incorporate player reviews and feedback into our ratings. A slot might have a top RTP, but player experiences about the game’s frequency of payouts and bonus features are also critically assessed.
  5. Volatility and Gameplay Balance
    While RTP is important, we also consider the balance between RTP and volatility.
  6. Updates and Re-evaluations
    Our ratings are not static. We constantly update our reviews based on new information, ensuring our readers have access to the most current and accurate information.
  7. Accessibility and Play Options
    Finally, we assess where these high RTP slots are available and recommend casinos that offer these top RTP games.

Why Trust Us

JohnSlots team dedicates:

  • 3 people to find top RTP slots
  • 28 hours a month to finding the highest RTP slots
  • spends 15 hours a month updating information

What Are High RTP Slots and How Do They Work?

High RTP slots offer higher returns to players by giving back a bigger percentage of wagers placed over a certain period.

This means that the casino house edge is smaller on these games, which increases the winning chances since the casino’s advantage is considerably reduced.

They also provide lower risk and extend gameplay sessions due to more frequent wins and better returns.

However, the best RTP slots may not offer the same opportunities to win big as lower RTP and higher volatility slots. Despite offering larger individual payouts, high-variance slots can be frustrating due to long periods without a payout.

When discussing top RTP slots, a high RTP is typically considered as anything above 96%, while mid-range or average RTP falls between 95% and 97.99%, and anything below 94.99% is considered low.

The choice to play the best RTP slots depends on personal goals and tastes in gambling, considering the preference for frequent or large payouts. As always, only wager what you can afford to lose.

How to Choose the Right One for You?

We hope you now have a better understanding of how RTP slots work – the next step is to find the one that you like to play.

Many factors can contribute to an enjoyable gaming experience, and the RTP is just a small part of a slot’s make-up. Other elements include game mechanics, big-win potential, bonus features, and graphics. Check our table below for a more succinct breakdown:

Slot Theme If you’re just starting out, the world of slots can seem infinitely huge! One of the things people tend to stick to when choosing a slot to play is their favourite themes. Slots can have similar features but an Egyptian slot will be very different from a Sports slot. Test different themes of slots for free before parting with real money to see what suits you best.
Volatility/Variance Whether you appreciate volatility depends on the type of gamer you are. The higher the volatility, the greater the risk – as you tend to win less often, but the bigger wins tend to be explosive.
Slot Features The video slot has evolved ever since they first came to our computer and mobile screens. Where once, a basic free spins round was all you could expect – you can now trigger random features, unlimited multipliers, reel modifiers, and much more.
Slot Developer Each gaming provider has their own specific style, employing different mechanics, notable designs, and an identifiable soundtrack.
Reels and Paylines The style of a slot can dictate the experience of a player. For example, if you appreciate the classic 3×3 reelers of years gone by, then you may not enjoy the innovative technologies that some of the newer slots employ. 3 reel slots normally have between 1 and 10 paylines. 5 reel slots can have up to 243 paylines and Megaways slots pay up to 117,649 ways! The more paylines there are, the more likely you are to win. However, the payouts tend to be less than those games with fewer paylines. Some games allow you to modify your paylines.

👍👎 Pros & Cons of Playing High RTP Slots

Now that you know what some of the best RTP slots are available, let’s turn our attention to the pros and cons of playing such games. After all, you may want a good overview of what to expect.

  • Thumbs-Up Lower house edge
  • Thumbs-Up Longer gameplay
  • Thumbs-Up Lower risks
  • Thumbs-Up Better long-term profits
  • Thumbs-Up More frequent wins
  • Thumbs-Down Lower jackpots
  • Thumbs-Down Smaller payouts
  • Thumbs-Down Possibility of getting bored
  • Thumbs-Down Variety is limited
  • Thumbs-Down The danger of chasing losses

✅ Advantages explained

One of the biggest advantages of high RTP slots is that they are profitable over time. This is beneficial, especially when playing with bonus funds or free spins, as they help fulfil wagering requirements. Other factors like deposit bonus size and wagering requirements also play a role, but with average or low requirements and some luck, meeting them is possible.

❌ Disadvantages explained

Some of the best slots with high Return to Player (RTP) have low volatility. This means they can pay out smaller amounts. There are not many high RTP slots available in the market. It’s possible to lose track of time and end up placing more bets than you can afford, which could result in the loss of your bankroll.

Slots Volatility and RTP

Slot machine volatility, or variance, refers to the risk level and payout frequency of a casino game. Understanding the importance of variance is crucial to grasp how casino games work. It’s important to consider both Return to Player (RTP) and slot variance when selecting the best slots to play. While RTP gives a general long-term outlook on potential returns, slot variance informs you about the risk level and frequency of wins in the short term. They operate on different scales and shouldn’t be confused.

RTP slots

How to Find the Slot’s RTP Rates?

Finding out the RTP of an online slot game is essential for players who want to make informed decisions about their gameplay. Licensed and regulated software game developers are required, under the strict guidelines of their gambling licence, to provide this information. A quick search or looking up the slot reviews here at JohnSlots should yield these results. You can also:

1. Check the Slot’s paytable

The most straightforward way to find a slot’s RTP is by having a glance at the game’s paytable. Here, you will be able to find all sorts of information, including the value of the symbols, in-game features and number of paylines. In many modern online slot games, the RTP is listed within the paytable. Here are two examples from providers Yggdrasil and NetEnt:

2. Check our Slot Reviews

Another more convenient option to find out a game’s RTP is to refer to our slot reviews. Our reviews break down the game’s features, volatility as well as payout percentage. Simply use the ‘Search’ tab to look up any specific games.

3. Calculate RTP

If you cannot find access to this information, you can calculate it yourself. You would need to calculate the total amount won divided by the total amount wagered. This option is less practical for individual players, but those who have access to historical data and time can happily analyse the performance of slot games.

Total amount paid by the slot £9,500
Total amount wagered £10,000
RTP= 95% £9,500 / £10,000 x 100

How is RTP calculated in slots?

The Theorical RTP is based on the game’s algorithms and probability models, not on actual player betting activity. It shows the percentage of money that a slot machine will pay back to players over time. Game developers use software and statistical methods to simulate millions of spins to estimate the RTP as accurately as possible before a game is released.

🧮 Here’s how the Theoretical RTP is calculated:

  1. Game Design and Probability: The RTP comes from the game’s design. Each outcome in a slot game (like symbols lining up in a certain pattern) has a probability of occurring. The game developers calculate the likelihood of these outcomes using probability theory.
  2. Payout Ratios: For each possible outcome, there’s a defined payout (how much the player wins). Developers calculate the expected payout for each outcome by multiplying the probability of the outcome by the payout amount associated with it.
  3. The Sum of All Outcomes: The RTP is calculated by adding up the expected payouts of all possible outcomes. This sum represents the total amount of money that would theoretically be returned to players.
  4. Percentage Calculation: Finally, the RTP percentage is obtained by dividing the total expected return to players by the total amount wagered, then multiplying by 100 to get a percentage.


Let’s consider a simple hypothetical slot game with three outcomes:

  • Outcome A occurs with a probability of 0.1 (10%) and pays 5 times the bet.
  • Outcome B occurs with a probability of 0.2 (20%) and pays 2 times the bet.
  • Outcome C (losing outcome) occurs with a probability of 0.7 (70%) and pays 0 times the bet.

The RTP calculation would be:

  • RTP from Outcome A = 0.1 (probability) × 5 (payout) = 0.5
  • RTP from Outcome B = 0.2 × 2 = 0.4
  • RTP from Outcome C = 0.7 × 0 = 0

Adding these together:

  • Total RTP = 0.5 + 0.4 + 0 = 0.9 (This is the expected return per unit bet)

To find the RTP percentage:

  • RTP % = (0.9 / 1) × 100 = 90%

The game has a theoretical RTP of 90%, which means that over a long period of time and many rounds of play, the game is expected to give back 90% of all wagered money to the players.

For example, if a slot game has an RTP of 90%, and a total of £10,000 is wagered over some time, the expected payout would be £9,000.

In online slots, these calculations are much more complex due to a larger number of possible outcomes and combinations. Based on this theoretical RTP, players can estimate how much a game will pay out over time.

Varying RTP Rates

You may come across a few online slot game reviews of games that have different RTP options. Most game providers such as Pragmatic Play have three different RTP options, while game provider Play’n GO has as many as five different RTP options.

This may be confusing for some bettors. Of course, everyone wants the best RTP slots, but what do these different versions of RTP rates mean? Since software game developers collaborate and partner up with online casinos, the casinos can choose which RTP they are going to opt for. This means that if a game has three RTP rates, such as 96%, 95% and 94%, and a casino chooses 94%, then that’s the payout percentage that will be used in that specific game at that specific online casino.

As players, there is no way of knowing which payout percentage you will benefit from. Since the payout percentages can vary considerably between one and the other, it is always best to play it cautiously and manage your bankroll properly.

What’s the Difference Between RTP and Payout?

The main difference between RTP and payout is that RTP gives you an average over time of how much a slot machine might return to all players, while payout tells you how much you can win in one game.

💸 Top 5 Best Payout Slots

Here are 5 online slots known for offering the highest RTP:

  1. Mega Moolah by Microgaming – In September 2018, a player from the UK won a massive £18.68 million ($23.5 million converted to pounds) on Mega Moolah after playing less than 50 times. Each spin cost only $0.75, or about £0.60. Known for its high RTP, this game often leads to high payouts.
  2. Mega Fortune by NetEnt – This slot game has a return to player (RTP) of 96.6%.It is one of the top RTP slots available, where one of the biggest wins occurred when a Finnish player won €17.8 million, which is approximately £15.664 million, in January 2013, with a bet of just $0.25 per spin.
  3. Absolootly Mad Mega Moolah by Microgaming – A player from Belgium landed a giant jackpot of £23.6 million on this slot, which increases your winnings with a 5x multiplier for each consecutive win. This game showcases high RTP rates which enhance winning probabilities.
  4. Hall of Gods by NetEnt – Neil, a player from Scotland, deposited only £30 and won a stunning £6.3 million on his first play in a UK online casino. his slot’s RTP rate contributes to its frequent large payouts.
  5. Jackpot Giant by Playtech – In October 2018, one lucky player won £9.4 million, striking it rich with just a few spins. Its highest RTP makes it a favorite among players looking for big wins.

Casino Bonuses Available at Highest RTP Slots

Even if you have found the best RTP slots, you need to be mindful of any casino bonuses and promotions you are claiming. The right RTP can only take you so far, but if you are claiming casino bonuses that may be overly generous in size but come with bad terms and conditions, such as impossibly high wagering requirements, your odds of cashing out any winnings diminish considerably.

You also have to remember that the house edge, even if it is lower when it comes to high RTP online slot games, still plays an essential role in depleting the bankroll of the player. It is of the utmost importance then that all factors are taken into consideration, and simply not only opting for online slot games with a high payout percentage.

Shopping around for the best casino bonuses based on their fine print is crucial. Another key term to factor in when it comes to casino bonus terms is the eligibility of games. Some casino bonuses omit some if not all, types of high RTP slot games. You can generally see the entire details and list of games that are generally exempt from contributing to the wagering requirements on the terms and conditions page.


Here’s the list of most common questions regarding slots’ RTP:

Generally, yes. Online slots often have an RTP ranging from 95-99%, while land-based slots usually hover around 88-92%. This illustrates why many players seek out high RTP online slots for potentially better returns.


Generally, yes. The best RTP slots are typically found online, where their payout percentage varies on average between 95 and 99%. Slot machines at brick-and-mortar casinos have an RTP that hovers around 88 to 92%, making the top RTP games more accessible online.


In some cases, the RTP may increase your chances of triggering bonus features. For example, you are more likely to trigger the in-game features more frequently in games such as Blood Suckers by NetEnt. Since this game has a highest RTP of 98%, you can expect more bonus rounds and increased returns.


The RTP (Return to Player) rate is initially tested by independent agencies before a slot game is released. After launch, it undergoes periodic audits which can be monthly, quarterly, or annually, depending on regulatory requirements. These checks ensure that the game continues to operate fairly and matches the stated RTP rates.


Yes, the RTP of a released slot can be changed, but this requires approval from regulatory authorities and involves a thorough testing process to ensure fairness. Changes must be clearly communicated to players. This situation may occur when adjusting games to offer a higher RTP to remain competitive in markets with players seeking high RTP slots.


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Online Slot Expert

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Leanna Madden is an expert in online slots, specializing in analyzing game providers and evaluating the quality and variety of slot games. With her extensive knowledge, she guides players to the best slot options, including high RTP slots and those with exciting bonus features. Leanna's insights help players make informed decisions and enjoy rewarding slot experiences at online casinos.

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