Best RTP Slots UK - Highest Paying Slot Games in 2026

Discover the best RTP slots in the UK. These are the best payout slots to play for the highest return to player percentages.

Best RTP slots are listed in the table below:

Table of Contents

Top 15 Best RTP Slots

The top 15 best RTP slots have return rates going from 97.3% all the way up to 99.9%. Here are the currently highest RTP slots you can play in the UK.

The best paying slots are listed below:

1. Money Carlo - 99.9%
2. Mega Joker - 99.0%
3. Book of 99 - 99.0%
4. Jackpot 6000 - 98.9%
5. Thrones of Persia - 98.8%
6. 1429 Uncharted Seas - 98.5%
7. Madam Lucky - 98.1%
8. Marching Legions - 98.1%
9. Multi Bricks - 98.1%
10. Money Vaults - 98.1%
11. Money Cart 2 - 98.0%
12. Madame Mystique Megaways - 98.0%
13. Blood Suckers - 98.0%
14. Jokerizer - 98.0%
15. Starmania - 97.8%

1. Money Carlo – 99.9%

Money Carlo is an oddity in the world of best RTP slots. Designed by Storm Gaming, it has the highest RTP in the world at 99.99%. This means that in the long run, the game barely makes any money for the casino.

The game is a simple, stylish slot that has an Art Deco theme. It is a luxurious game with symbols relating to the finer things in life, well, in the 1920s, anyway.

There is a little issue, though. This game is not available basically anywhere. With an RTP this high, no casino seems to want it in their game library.

Even though the game is from a UK-licensed developer, it is nearly impossible to find a casino that lets you play it.

2. Mega Joker – 99.0%

Mega Joker is generally seen as the UK's highest RTP slot, as this game is actually available for people to play. It may be one of the oldest 99% RTP slots, but not the only one.

The game has a huge 99% RTP value.

Mega Joker was made by NetEnt and is a classic retro-style slot. The game is very fast-paced but simple to follow.

It has two tiers, where the wins from the lower tier can be used to play the top one. At the top, the wins are much bigger, but getting to play there is not easy.

Just make sure you check the game information for which RTP version the casino is using, as it has a variable RTP setting for casinos.

3. Book of 99 – 99.0%

Relax Gaming went above and beyond with their Book of 99 slot. Although this game is not part of the original Book of series, it has some similar features.

As the name would imply, this slot comes with an RTP of 99%.

The game has a historical Greek theme and stands out from the crowd. Out of the games with ultra-high RTP, Book of 99 is the most complex game and feels like a proper modern video slot. It even has all the familiar features, like free spin rounds and expanding symbols.

4. Jackpot 6000 – 98.9%

Jackpot 6000 is a classic slot from NetEnt that was released all the way back in 2011. It is a retro slot in both age and style.

The biggest draw of this game is the high RTP, and it was the first one of its kind. For the longest time, Jackpot 6000 was the highest RTP online slot, only to be taken over by Mega Joker.

As a game, Jackpot 6000 is very basic. You have three reels, and the only thing you can call a feature is the Supermeter, where you can put your wins and use that money to go for even bigger versions of the same wins.

5. Thrones of Persia – 98.8%

Tom Horn Gaming released Thrones of Persia in 2016. This game is set in historic Persia and is a highly volatile slot, which is common at this RTP range.

The game has a limited number of features, all revolving around the scatter symbol. Getting at least three of those will trigger the Ziggurat of Babylon Bonus Game, which lets you increase the amount of free spins and their multiplier.

This slot is notorious for having varying RTP values on casinos. If you want to play it, just make sure you check what the RTP setting is from the game info screen or ask the casino for the data.

6. 1429 Uncharted Seas – 98.5%

Thunderkick joined the ranks of high-RTP slot developers when they released 1429 Uncharted Seas. This stunning slot is popular but often banned for bonus wagering due to its high RTP. Fortunately, 1429 Uncharted Seas casinos often offer various other bonus types besides regular deposit bonuses.

The slot is beautiful, which wasn't really a surprise when you consider that it is from Thunderkick. They are known to create games where the visuals really stand out.

The game has a limited number of special features. The expanding wilds are the more common ones, and hitting 3 compasses will trigger the free spin feature.

7. Madam Lucky – 98.1%

Madam Lucky is a mystical game from Synot that was released in 2023. It looks great and is packed with classic features, like free spins, multipliers and scatters. The game has mid to high volatility and a 3,500x maximum win.

Madam Lucky may not be the most innovative game out there. The gameplay is similar to slots we saw ten years earlier, but when something works, why fix it?

What makes this game interesting and puts it on this list is the RTP. Madam Lucky has a maximum RTP setting of 98.15%, which is remarkably high. However, the game does come with multiple settings, and the casino might not use the best one. So, check the game information to see which one is being used.

8. Marching Legions – 98.1%

Marching Legions is Relax Gaming's slot that looks more like a mobile game than a slot. It is a stylish game with something unique to it.

The legions of soldiers are the wilds in this game. They are stacked, they nudge, and they march, meaning the stacks will trigger additional spins while the symbols move one reel to the left. And when enough soldiers have marched off the screen, you get free spins with even more soldiers.

This is the point where games mostly stop being just about the RTP value and start having unique features. As an RTP 98 slot, it was an easy pick for this category of slot games.

9. Multi Bricks – 98.1%

Multi Bricks is a return to the classic style of slots. This game by Synot Games is a three-reel machine with old-school symbols and five paylines.

The special feature mainly revolves around the stacked multiplier wilds. The multiplier can be up to 3x per symbol and a total of 27x per line. There is also scatters that can trigger the free spin mode.

If you want to play Multi Bricks, make sure you check the RTP your casino of choice uses. The game has a wide range of options for casinos where to set the value.

10. Money Vaults – 98.1%

Money Vaults is a treasure trove of gems and cash piles with massive payouts from Synot Gaming.

Money Vaults was released in 2023, and while it may look like a bit of an older game, it packs quite a punch. The main feature is the locking symbols, which are re-rolled until no new winning symbols are added. If you get enough of the reels filled, you get a multiplier of 3x, 4x or 5x.

Where things get interesting is the bonus game. It is a hold-and-win style feature, where you have three spins. If you hit a new symbol, those spins are reset. You keep going until you either have three consecutive non-winning spins or fill the entire screen.

One thing you need to be aware of when playing Money Vaults is that the game has a wide RTP range. While the best option is 98.07%, it can be as low as 85%. Check the RTP of the version you are playing before you start.

11. Money Cart 2 – 98.0%

Money Cart 2 is a stylish and somewhat unique slot concept from Relax Gaming. This mechanic has been seen before as a bonus game, but Relax made a whole slot around it.

The game is an all-or-nothing type of a slot with no paylines. You just need at least 3 bonus symbols to start the free spins, which rack up more symbols on the screen, constantly adding to the score. There are coin symbols and special symbols to mix things up.

The predecessor of this slot also had a high 98% RTP, but unfortunately the third iteration has dropped it down to 96% breaking away from the tradition.

12. Madame Mystique Megaways – 98.0%

Pragmatic Play has released multiple versions of their mystical fortuneteller slot. Madame Mystique Megaways is the one with the highest RTP, and also the one that is the hardest to find.

The game features the famous Madame in a simplistic but volatile setting. The slot features the Megaways mechanic and, of course, the RTP that can top up to 98.03%. The game does have an adjustable RTP setting, meaning that not all casinos have it at this high setting.

If you have played Madame Destiny Megaways, you know what this game is all about. If not, it is a cascading Megaways slot with multiplier wilds. There isn't much more than that, because that is all you need.

13. Blood Suckers – 98.0%

Blood Suckers is a legendary slot from NetEnt released in 2013. For the longest time, it was the go-to game for many players, as it had both an interesting gameplay and a high RTP.

For its time, Blood Suckers was a fine slot, though nowadays the features are a bit dated. The game is still a fun one to visit, but by today's standards, it is by no means unique.

The slot has all the classics, wilds, a bonus game with bonus symbols and a free spin feature with scatters. This is exactly the same as what most slots of that era had.

14. Jokerizer – 98.0%

Yggdrasil released Jokerizer in 2016 and it was a popular slot on many casinos due to its high volatility, high RTP and, thus, high potential for bigger wins.

The game has a slight resemblance to Mega Joker and Jackpot 6000. When you win something, you can play the money in the Jokerizer mode, where there are additional Joker symbols for even bigger wins.

You could say that this is the more modern version of those games in terms of visuals and gameplay.

15. Starmania – 97.8%

Starmania was NextGen Gaming's attempt to bring the classic slot to the modern age.

This 97 RTP slot was released in 2015, and obviously, Starmania does borrow slightly from another popular slot of that time, Starburst. Though, Starmania's claim to fame is its high RTP, which clocks in at almost 98%. That is noticeably bigger than Starburst's 96%.

The gameplay is simple, as the game has only a handful of features. It has scatters for free spins and stacked wilds, which there are more of during said free spins, to rack up wins. Speaking of wins, they are also counted from both ways.

Where to Play the Best Paying Slot Games

List of the highest payout online slots sites for January 2026. Each best paying online casino Verified by Bojoko experts to have over 96% return to player percentage.

Best RTP slots sites are listed below:

Highest Payout Online Slots by Max Win

The highest paying slots by maximum win amount come from Nolimit City. Their Tombstone Slaughter slot features a max win up to 500000x your bet per spin.

Here are the highest payout online slots by max win in 2026:

Rank	Online Slot	Provider	Max Win	RTP	Launch Date
1	Tombstone Slaughter		500,000x	96.01%	28.01.2025
2	Tombstone RIP		300,000x	96.08%	11.01.2022
3	San Quentin 2: Death Row		200,000x	96.13%	24.09.2024
4	Starburst XXXtreme		200,000x	96.26%	15.07.2021
5	Peking Luck		180,000x	96.5%	30.08.2018

What Does RTP Mean in Slots?

RTP means Return To Player, and as the name implies, it means how much of the money players put in the game is given back as wins. Return To Player is a percentage, and that is how players will win after a long period of time. The closer it is to 100%, the better it is for you.

Running a casino is a business, so it is obvious that you can't give more than is put in, otherwise your business will go under in a heartbeat. That is why casinos need to find a balance between keeping a cut that is big enough to keep the business afloat and small enough to keep players wanting to gamble.

Before the era of online video slots, physical slot machines used to have an RTP of around 65-75%, which by today's standards is abysmal. When players could play without leaving their homes, the number of played rounds increased dramatically, and the casino edge could be reduced.

• As competition grew amongst online casinos, the RTP of games got higher.

This was the starting point of high-RTP slots that we know and love today. Having games with high RTPs is now a selling point for a casino. This is why the best paying casinos scour every high-RTP video slot on the market and take them in.

For a slot today, an RTP of 96% is considered good. Anything above that is excellent, and between 93 and 95 is still fine, as variance plays a bigger part in the short term.

Most new releases are not going to have extremely high RTPs, but you can check the new slot games and see what developers have been making lately.

As a player, you should be watchful of the RTP value of the games you are playing. It's not an end-all-be-all solution, but something worth a check. RTP is calculated from millions of spins, but it does tell something about the game. 

Pros and Cons of High RTP Slots

Choosing only games with high RTP values sounds good, but it does have some downsides. For example

Here are the pros and cons of playing high-RTP slots:

Other Casino Games With High RTP

When you want to find and play high-RTP games, slots aren't your only option. You can come across plenty of casino games with high RTPs. For example, baccarat and blackjack are both games that can have over 99% RTP.

Baccarat

Baccarat has an extremely high theoretical RTP, but this is not always the case. Some casinos will take a bigger fee on the banker's hands. Baccarat has always been a favourite of many high-rollers because of the high chance of doubling your bet. It is like betting on red or black in Roulette, but without that zero sector to mess things up. Learn more and find an online baccarat casino.

Blackjack

Another excellent choice for high RTP is blackjack. Blackjack using Basic Strategy can have a Return-To-Player as high as 99.39%. Our page for finding an online blackjack casino discusses options like splitting, doubling down and insurance that can have an impact on RTP.

Roulette

Roulette, in general, has a high RTP. However, it varies in different game variations. French Roulette might have an RTP as high as 98.65%, whereas with American Roulette, you might see as low as 94.74%. We've compil

ed an article for choosing an online roulette casino that highlights factors affecting the RTPs.

Crash Games

Crash games are known for their naturally high RTPs. Take, for example, Spribe's Aviator, boasting an impressive RTP of 97.00%. This makes it not only an adrenaline-packed game but also a high-paying one.

In crash games, your goal is to predict when the multiplier will peak and then cash out your winnings. You can play it safe, securing smaller 2x wins frequently, or take the risk for a chance at a massive multiplier win.

For the best crash gambling games and casinos for UK players, check out our crash betting games page. See our tips and decide how you want to play these high RTP games.

Using the Best RTP Slots for Bonus Wagering

You want to play for as long as possible when you wager casino bonuses. The more you win, the more spins you can get for a set amount of money and the more wagering you complete. So, picking a game that doles out the most wins is obvious. RTP value plays a significant role in bonus wagering; it's a reason for choosing a specific game and avoiding some.

But if we can figure this out, the casinos have already considered this. This is why slots with the highest RTP are commonly listed as games you can't use for wagering. So, always check the bonus terms for what games you can play. Usually, the games with roughly an RTP of 97.5% or higher are not eligible for wagering.

Now that you know the main ins and outs of utilising high RTP slots for completing wagering requirements, it's time to check out some main bonus categories.

First Deposit Bonus

The first deposit bonus is a type of promotion casinos offer for a player's initial deposit. It typically matches the deposit to a certain percentage, with a maximum limit on the bonus amount. These bonuses are exclusively for the first deposit and might be lost if not claimed. Most UK casinos offer first deposit packages – see our dedicated page for first deposit bonuses.

Cashback Bonus

Cashback bonuses in online casinos offer players a return on their losses or wagers. They can be daily, weekly, or monthly and are often part of loyalty programs. These bonuses provide a percentage of money back based on net losses or total deposits. While some cashback offers have wagering requirements, the most favourable ones return cash without any conditions. Check Bojoko's list of reviewed and ranked cashback casinos.

Free Spins

Free spin offers are bonuses allowing you to spin slot game reels without using your funds. Free spins are split into two categories: ones that don't require a deposit and ones that do need one. See our list of free spins with no deposit that is continuously updated. While free spins provide an opportunity to win real money, they often come with wagering requirements and other terms.

No Deposit Bonus

No deposit bonus offers in online casinos are bonuses given without requiring a deposit. They attract new players and provide a risk-free way to try out casino games. No deposit casino sites may include bonus money, spins, or fortune wheels, allowing players to win real money in multiple free ways. The main appeal of no deposit bonuses is the opportunity to win without depositing your money.

Reload Offers

Reload bonuses in online casinos reward existing players after they have made their initial deposit. These bonuses provide additional bankroll or spins to boost the gaming experience. They differ from welcome bonuses in that they are aimed at existing players and might be smaller but more frequent. See our page for the latest reload offers.

Slot RTP Might Vary in Slot Sites

As the RTP is one of the more crucial features of a slot, casinos and developers have worked together to make things a bit difficult for players. A single slot can have multiple RTP values.

When a developer creates a game, they add a back-end control that allows the casino to set the RTP to one of a couple preset values. The developer will advertise the slot as having the highest RTP possible, but casinos might simply set it lower.

This is a bit of a nuisance, as you need to manually check where the RTP has been set on UK slot websites. The range depends on the game, but can vary over ten percentage points, which is a huge difference.

If you are specifically hunting for games with high RTPs, you should always check the game's information page to see what the value is before you start.

Slots RTP vs Variance and Volatility

RTP tells you how much a slot pays back in the long run, but it doesn't explain what happens while you're actually playing. That's where variance and volatility come in.

Variance describes the short-term swings in your results. If slots only followed RTP perfectly, you'd get tiny, predictable wins and losses, but real slot play jumps up and down so that some players win big and others don't. That short-term fluctuation is variance.

Volatility is the developer-rated scale that tells you how strong those swings will be.

• Low volatility slots pay wins more often, but they are smaller.
• High volatility slots might not give that many wins, but when they do, they are bigger.

In short, RTP is the long-term average payout. Variance and slot volatility determine what your play session feels like.

Return To Player and Responsible Gambling

Return To Play value is a good starting point to understanding slot odds, but it is not a guarantee. That statistic is calculated over millions of spins, and doesn't scale down to short-term gameplay.

It is important to remember that gambling is always risky, and in the long run, the casino will win. You should never look at gambling as a way to make money or fix any financial problems.

Gambling is a form of entertainment. Play only with money you can afford to lose.

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About the Author

Article by:

Ville Saari

Ville is an iGaming industry veteran who has written thousands of gambling-related reviews and articles since 2009. He is an IT engineer with a passion for game and strategy optimisation and for teaching the world to play better.

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Edited By:

Lauri Hannelin

Lauri is a casino enthusiast who began his career in the gambling industry in 2019. His journey has spanned various facets of the iGaming world, from technical and commercial roles to innovative positions in online casino and sports betting companies. This diverse experience has not only deepened his understanding of the industry but also shaped him into an all-around expert in online casinos.

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