Best payout slots at UK online casinos 2024

How do you give yourself a better shot at winning cash prizes worth more than £1 million? The answer is simple: play the best payout slots. That’s easier said than done if you don’t know which slots offer the biggest payouts. 

Fortunately, I’ve spun my way around the block more than a few times, and I know what the highest payout slots are. More importantly, I know where to find them, and if you stick around for the next few moments, I’ll reveal all.

🎰 Slots with the highest RTP at UK online casinos

My strategy when it comes to finding the highest payout slots in the UK focuses on two metrics: RTP values and jackpots. I’ll talk about the top-paying slots jackpots and how they work in the next section. 

Before that, we need to discuss the importance of RTP values. Otherwise known as Return to Player (RTP), this value tells you the house edge for a given game. For example, if the RTP is 97%, the house edge is 3%. In practice, this means you’ll win, on average, 97% of the time. So, if you bet £1 for 1,000 spins, you’d expect to get £997 back. 

Now, I know what you’re thinking. If you wager £1,000 and get £997 back, you’ve lost £3. True, but it’s important to understand that RTP values are theoretical averages. This means results in any given session fluctuate. They converge around the average over time, but in a single session, you could have an RTP of 150%. 

That’s what makes it possible to win when you play slots online. From this, logic tells us that you should play slots with the highest RTP values. A higher average RTP means the potential highs will be higher, and the potential lows won’t be as detrimental to your bankroll. That’s why I’m giving you my top 10 high RTP slots.

1. Mega Joker

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• RTP: 99%
• Jackpot: 2,000x
• Volatility: High
• Special Feature: dual gameboard and super metre

Any slot that combines entertainment with a sky-high RTP has to be top of my list. Taking inspiration from old-school fruit machines, this fun-filled slot brings the heat with a 99% RTP and 2,000x jackpot. Those are impressive stats, particularly when you consider Mega Joker has three reels and a dual gameboard set-up. 

2. Triple Bar 

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• RTP: 98.15%
• Jackpot: 40x
• Volatility: Medium
• Special Feature: none

Simplicity is a quality that often gets overlooked in today’s gaming world. Don’t get me wrong, I love high-paying slots with tons of fancy features and animations. However, I’m also a traditionalist. I enjoy slots like Triple Bar that have three reels, no bonus features and a classic design. Yes, the jackpot isn’t very big. However, in terms of RTP values, it’s one of the top slots UK players can play.

3. Madam Lucky

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• RTP: 98.15%
• Jackpot: 3,500x
• Volatility: Medium to High
• Special Feature: red/black gamble game

Madam Lucky is responsible for some of the best slots payouts online. The mystical gypsy theme is fun, and I love the fact that you can take a certain amount of control by playing the red/black game. By this, I mean that you can choose to gamble any prizes you win by playing the red or black bonus game. This feature contributes to Madam Lucky’s higher-than-average RTP.

4. Marching Legions

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• RTP: 98.12%
• Jackpot: 10,000x
• Volatility: High
• Special Feature: marching stacks and nudges

Marching Legions at Mr Vegas has one of the most visually entertaining designs I’ve seen. Unlike other best-paying slots, you’re looking down on the reels from above. This creates a unique dynamic that’s made even more interesting by the fact that you’re in the middle of the Roman Empire. In keeping with the theme, soldiers are a big part of the game and appear as standard symbols and part of marching stacks of symbols. 

5. Aztec Jaguar Megaways

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• RTP: 98.11%
• Jackpot: 6,250x
• Volatility: Medium
• Special Feature: Megaways paylines

I’ve been spinning slots for more than a decade, and I fully embrace the Megaways revolution. However, as entertaining as it is to have the number of paylines change on every spin, this feature lowers the average RTP value. Therefore, I was surprised to see that Aztec Jaguar Megaways, complete with its 117,649 paylines, offer some of the highest payouts in the UK.

6. Golden Chance

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• RTP: 98.11%
• Jackpot: 5,000x
• Volatility: High
• Special Feature: respins, wild and gamble feature

Three-slot machines often have high RTP values, and Golden Chance is a great example of this. The average slot RTP at UK online casinos is 95%, so this game is way above the norm. I love the tombola-style design, and the respin feature is a nice touch. For me, the real reason to try this high-RTP slot is its 5,000x jackpot. 

7. Multi Bricks

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• RTP: 98.1%
• Jackpot: 500x
• Volatility: Low to Medium
• Special Feature: multiplier wilds and free spins

Slots from SYNOT aren’t widely available in the UK, but Mr Vegas has a few of them. That’s handy for anyone wanting generous slots payouts because games such as Multi Bricks have high RTP values. This particular offering has a 98.1% RTP that’s backed by multiplier wilds, free spins and a gamble feature. 

8. 8 Fruit Multi

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• RTP: 98.02%
• Jackpot: 2,500x
• Volatility: Medium
• Special Feature: avalanche wins

Another SYNOT slot worth checking out at some of the top UK online casinos, including Mr Vegas, is 8 Fruit Multi. I could make the joke that it gives you more than the recommended five servings of fruit per day, but I won’t because it offers much more than that. As well as a heady RTP and 2,500x jackpot, the avalanche feature makes it possible to turn single spins into a service of wins. 

9. 27^th Cabaret

20

• RTP: 98.02%
• Jackpot: 500x
• Volatility: Medium
• Special Feature: expanding wilds

27^th Cabaret is a classic three-reel slot with a nice selection of modern features. There’s a gambling game that gives you a chance to double any prize up to 10 times. Your payout potential is also given a boost by an expanding wild, which appears in the form of a glamourous showgirl. This combination of features contributes to an RTP way above the industry average. 

10. Moonlight Fortune 50

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• RTP: 98.01%
• Jackpot: 1,000x
• Volatility: Medium
• Special Feature: stacked wilds and free spins

The final game in my list of the 10 best payout slots is Moonlight Fortune 50. This game’s forest-themed mystical vibe is great, and I like the fact that you’ve got free spins and stacked wilds helping you along. For me, the main reason it stands out among the highest-paying slots online is its volatility. A medium volatility rating, in tandem with a 1,000x jackpot and high RTP, makes Moonlight Fortune 50’s odds better than other slots. 

🤑 Online slots by maximum wins

The top-paying slots always have progressive jackpots. Some fixed jackpot slots, such as Sweet Bonanza at Neptune Play Casino, have six-figure prizes. However, as impressive as £100,000 payouts are, they pale in comparison to progressive jackpots worth more than £1 million. 

Before I reveal my favourite online slots, I’ll quickly talk about jackpots and how you can find the highest payouts. There are three types of progressive jackpots:

• Standalone: although they’re less common than they used to be, standalone progressive jackpots are still available at the best UK online casinos, including MrQ and Duelz Casino. In fact, standalone progressive jackpots are often the biggest because they’re linked to a single game and, therefore, hit less frequently. That’s why famous examples from this category, including Mega Moolah, are the highest-paying slots in the world. 
• Networked: there are various progressive jackpot networks, including Jackpot King and Mega Jackpots. Slot developers and UK online casino operators plug into these networks, which means thousands of players across hundreds of sites are adding to the prizepool. Therefore, when a popular video slot such as Fishin’ Frenzy is added to the Jackpot King network, it becomes one of the best-paying slot games online. 
• Promotional: progressive jackpots offered as part of a promotion are great because they’re added to popular video slots. For example, Pragmatic Play’s Drops & Wins progressive jackpot promotion gives you a chance to win random payouts from a £10 million prizepool. Similarly, you can play for in-house daily jackpots at talkSPORT BET Casino. Both of these promotions improve the payout potential of ordinary slots.

Now that you know a bit more about progressive jackpots, here are the 10 best-paying slots in the UK:

1. Mega Moolah

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• RTP: 88.12%
• Jackpot: Over £1 million
• Volatility: Medium
• Special Feature: free spins and four jackpots

It’s no coincidence that the central character in Mega Moolah is a lion. The king of the jungle reflects the fact that Mega Moolah rules that slot world. It might not have the same amount of razzmatazz and bonus features as other jackpot slots, but Mega Moolah remains the king of big-money payouts. 

There are four progressive jackpots to play for, and the largest starts at £1 million. However, owing to this game’s popularity, it’s responsible for the highest payouts in online casino gaming history, including a world record jackpot worth over £17.9 million.  

I recommend checking out the Mega Moolah spinoffs, including Mega Moolah Immortal Romance, at talkSPORT BET Casino.

2. Major Millions

20

• RTP: 89.37%
• Jackpot: Over £250,000
• Volatility: Low
• Special Feature: classic three-reel slot

Another classic standalone jackpot slot is Major Millions. Released in 2009, Major Millions remains one of the best-paying jackpot slots in the world. The seed amount for this game (i.e. the smallest amount you can win) is £250,000. However, like Mega Moolah, Major Millions is responsible for some of the best slots payouts in history. I’ve seen it offer jackpots topping £2 million at Mr Vegas Casino. The highest payout ever for this game is more than £2.8 million.

3. Mega Fortune

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• RTP: 96%
• Jackpot: Over £1 million
• Volatility: Low
• Special Feature: free spins and Wheel of Fortune bonus wins

Mega Fortune was NetEnt’s 2009 attempt to compete with the highest-paying slots online, including Mega Moolah and Major Millions. Its progressive jackpots have been known to reach £15 million, but that’s not the only reason I like this game. The design is great, and it has more features than a lot of the top slots in this category. The real selling point, though, is the RTP. At 96%, you’ve got a better theoretical chance of winning prizes from Mega Fortune than you have with many of the highest-paying jackpot slots. 

4. King Kong Cash Go Bananas Jackpot King

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• RTP: 93.49%
• Jackpot: Over £1 million
• Volatility: Medium to High
• Special Feature: cash collect, free spins, prize multipliers

King Kong Cash has become one of the most entertaining slot franchises in the UK over the last decade. One of the latest instalments was released in 2023 and added to the Jackpot King network. This means you not only get to spin in the jungle and play for free spins and cash-collect symbols but progressive jackpots worth more than £2 million.  

5. Fishin’ Frenzy Jackpot King

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• RTP: 93.32%
• Jackpot: Over £1 million
• Volatility: Low
• Special Feature: free spins fishing bonus

Like King Kong Cash Go Bananas, Fishin’ Frenzy is part of a franchise. The original game was fun, but its 500x jackpot didn’t make it one of the UK’s best-paying slots. Fortunately, the developers added it to the Jackpot King network, which means you get to fish for free spins and three progressive jackpots worth upwards of £1 million.  

6. Book of Atem: WowPot

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• RTP: 93.5%
• Jackpot: Over £1 million
• Volatility: High
• Special Feature: expanding symbols, free spins, multi-tiered jackpots 

I’d never seen Book of Atem until I joined talkSPORT BET Casino. Developed by All for One Studios and released in 2019, the original game contains a variety of features, including magic free spins, which can unlock payouts topping £125,000. A year later, it was added to the little-known but extremely generous WowPot network. This pushed Book of Atem’s payout potential beyond the £1 million mark.

7. Diamond Jackpots

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• RTP: 94.12%
• Jackpot: Over £1 million
• Volatility: High
• Special Feature: mega prize multipliers

Diamond Jackpots has some of the highest payouts I’ve seen at talkSPORT BET Casino. It’s a retro slot machine, which I like. However, because it was released in 2017, it’s full of modern features. OK, so it’s not as innovative as the likes of King Kong Cash. However, with multipliers and the ability to play for £1 million jackpots for just 10p per spin, it’s right up there with the best slots for big wins. 

8. King Spin Deluxe

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• RTP: 96.08%
• Jackpot: Over £1 million
• Volatility: Medium to High
• Special Feature: randomly activated progressive jackpots

King Spin Deluxe is a fruit machine with a twist. That twist comes in the form of three progressive jackpots provided by Jackpot King. The reason I love this slot is the fact that you can win over £1 million on any spin. That means you can bet any amount you like (from £0.10) and secure a massive payout.  

9. Temple Tumble 2 Dream Drop

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• RTP: 94.8%
• Jackpot: Over £1 million
• Volatility: High
• Special Feature: free spins, multipliers and exploding symbols

If you’re looking for the best payout slot that flies under the radar, I recommend Temple Tumble 2 Dream Drop. The Dream Drop network means you can win one of five progressive jackpots, which is great. Temple Tumble 2 is also packed with more features than other progressive slots, including free spins, multipliers and exploding symbols. 

10. Winstar

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• RTP: 96%
• Jackpot: Over £500,000
• Volatility: Medium
• Special Feature: mystery symbols

Winstar looks a bit like Starburst, which is a positive. The negatives are that it doesn’t have any free spins or respin features like Starburst. If that’s the case, why is it one of my 10 best payout slots? Firstly, the 96% RTP means you’ve got good odds. Secondly, there are mystery symbols that give you a shot at jackpots topping 50,000x. Add progressive jackpots to the mix and you’ve got a stellar slot.  

🕵️ Finding the slot RTP: A step-by-step guide

How did I find the highest payout slots? I might be an industry expert, but the process of finding slots with seven-figure jackpots is actually very easy…

• Step 1: read our UK online casino reviews. 
• Step 2: find a UK casino site you like the look of, such as BetMGM, and use our secure sign-up link to unlock an exclusive welcome bonus. 
• Step 3: log into your account and make a deposit. Making a deposit is important because it releases your welcome bonus and gives you the chance to play for cash prizes. 
• Step 4: go to the slots lobby and tap one of the following filters: video slots or jackpot slots.
• Step 5: order the slots by popularity (this filter might be listed as “hot”). What I’ve found over the years is that the top-rated and most popular slots are the ones with the highest payouts. 

How to know the RTP for online slots

You can find the RTP for online slots in two ways:

1. You can visit the developer’s website and read through the slot’s game description. 
2. You can log into your favourite UK casino, load up a slot, and tap the settings icon to get an overview of its rules and RTP. 

One trick I’ll reveal right now is that RTP values can vary. Most slots have a fixed RTP, but some have ranges. Casino operators can adjust RTP values within these ranges if they wish. Therefore, you might find that the same slot has a different RTP at different casinos. That’s why it’s often a good idea to join a variety of online casinos and compare RTP scores for slots you enjoy.

🪙 RTP for other casino games

The odds for slots aren’t as good as table games, but the jackpots are significantly higher. Indeed, when you look at the highest payouts ever recorded, they’ve all come from slots such as Mega Moolah rather than table games such as blackjack. Based on this, let’s take a closer look at how RTP values differ between casino games.

RTP for jackpot slots

Progressive jackpot slots typically have lower RTP values than video slots and table games. Mega Moolah is a perfect example of this. The upside, however, is that these games offer the best payouts because everyone is contributing to a communal prizepool. What I will say is that newer jackpot slots, such as Fishin’ Frenzy, have higher RTP values than classics like Major Millions. 

RTP for table games

Table games give you the best odds. I can rephrase this and say blackjack games have the lowest house edge. Winnings aren’t guaranteed, of course. However, if you want the best shot at banking small prizes on a consistent basis, table games are the answer. My tip is to play blackjack and baccarat because they have the highest RTP values (over 99%).

RTP for live games

Live table games match their digital counterparts in terms of RTP values. This means you can play blackjack and enjoy a 99% RTP. Game shows and novel variations of roulette, such as Lightning, have lower RTP values. However, the positive to these live games is the fact they have payouts topping 1,000x your bet. 

🧑‍💻 Payout slot software providers

Which software providers consistently publish the best-paying slots? Based on my research and the games listed in this guide, the following providers come out top in the payout stakes:

1. Games Global (Microgaming)

My top slots from Games Global are Mega Moolah and Major Millions. 

2. SYNOT

The highest RTP slots from SYNOT are Multi Bricks, 8 Fruit Multi and 27^th Cabaret.

3. NetEnt

The world’s leading slot provider is responsible for a ton of top-paying slots, including Mega Fortune.

4. Blueprint

All of the highest payout slot games within the Jackpot King, including Fishin’ Frenzy and King Kong Cash, come from Blueprint. 

5. Relax Gaming

Relax Gaming slots such as Marching Millions are packed with features and animations, as well as having high RTP values. 

🙋 High payout slots FAQ

I want you to get maximum value from the best-paying slot games online. So, to help tie up any loose ends and guide you in the right direction, here are three final things to consider. 

1. What is the biggest RTP for slots in UK casinos?

The best payout slots in terms of RTP values in the UK are Mega Joker, Triple Bar and Madam Lucky. These online slots have RTP values in excess of 98% and are available at top-rated UK online casinos such as Mr Vegas. 

2. What was the biggest-ever payout on a UK online slot game?

The biggest-ever payout for a UK online slot game is £13,209,300. Jon Heywood from Cardiff won the record-breaking jackpot in 2015 by spinning in the winning combination on Mega Moolah at Betway. Globally, the biggest ever online slot jackpot is $23.5 million (£17.9 million).

3. What is the lowest RTP for an online casino game?

The lowest RTP for an online casino game is under 90%. Mega Moolah is one of the most popular games with a low RTP value. It’s popular, despite its low RTP, because it offers the highest slot payouts worth more than £1 million. 

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A responsible gambler is someone who:

• Establishes time and monetary limits before playing
• Only gambles with money they can afford to lose
• Never chase their losses
• Doesn’t gamble if they’re upset, angry or depressed
• Gamcare – www.gamcare.org.uk
• GambleAware – www.gambleaware.org

Find our detailed guide on responsible gambling practices here.

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