Best RTP Slots | Best Payout Slots in the UK

Ever wondered which slot games offer the highest returns to players like you? Good news - it's easy to find out, and I’m here to give you the answers. On this page, you’ll find my top recommendations for the best payout slots and where to play them. Let’s get started!

Slots are the most fun part of any casino, but we all know it doesn’t matter how much fun a game is. That will always be secondary to winning. Casinos can have thousands of slots, so to help you out, I'll take you through the 10 best payout slots in the UK.

The "Book of" series is a casino favourite, and "Book of 99" stands out as one of the highest payout slot machines with an impressive 99% RTP. This slot game takes you on a Greek adventure where only the toughest warriors can take on the gods. The goal? Collect 99 books! Plus, with the chance to win up to 5,000 times your bet, it's a thrilling game to play any day. 

Pros:

• High winning potential: You can win up to 12,000x your stake.
• Easy-to-understand gameplay: Simple mechanic makes it perfect for beginners and experienced players.
• Expanding Symbols: As they cover more reels, expanding symbols can increase your winning chances.

Cons:

• Limited Availability: Not all casinos offer the game in its highest 99% RTP form.

If you're looking for top paying slot machines casinos have to offer, Money Cart 2 ranks high with an impressive 98% RTP. Here, the Mad Max-style train brings back familiar faces - Payer, Collector, Sniper, and Necromancer - in an even faster-paced game. Your goal is to unlock all reels and fill every position to win 500 coins. With a massive 5,000x win potential, it’s time to get spinning!

Pros:

• Popular series: A spin-off from the popular Money Train 2.
• High RTP: An impressive RTP of 98% offers great potential for returns.
• High-reward game: You can win up to 5,000x your stake on any spin.

Cons:

• Intense bonus features: The nine modifiers can be overwhelming for newcomers.

One of the best slot games to win regularly is 1429 Uncharted Seas, thanks to its RTP of 98.6%. Take a trip back in time to the 15th century and dive into choppy waters. The game includes five reels and 25 magical paylines. 

The symbols include the sun, moon and stars, some cool mythical sea creatures, and the elusive mermaid. The max payout is 670x your stake, which isn’t huge, but the high RTP% coupled with the chance to win up to 50 free spins makes up for this.

Pros:

• Widely available: You can play it at many UK online casinos.
• Low volatility: Perfect for new slot players looking for a steady pace with easier wins.
• Free spins bonus round: Win up to 50 free spins and keep spinning without draining your budget.

Cons:

• Varying RTP rate: The RTP can be lower at some casinos, so check the settings before playing.

The carnival has come to town, bringing one of the best winning online slots in Jokerizer. You can explore this fun carnival-themed game with some great animations while hunting for the 6000-coin max mystery win. With an RTP of 98%, Jokerizer is right at the top end of the best payout slots in the UK. Any win you have in the game activates Jokerizer mode, which gives you a chance to win a mystery prize if you land two jokers.

Pros:

• Pays both ways: The game mechanic allows wins to pay both ways, increasing your chances of hitting a payout.
• Mystery wins: Adds a surprise element to your gameplay.
• Classic look: A fruit-themed slot that's perfect for fans of classic, retro-style games.

Cons:

• Flexible RTP: The RTP can vary, with some casinos offering it as low as 94%.

What do you need to win a battle? I would say numbers and Marching Legions agree! This game involves a large group of warriors running into battle for you and triggering respins in their wake. With an RTP of 98%, it is one of the best slot machines to win on consistently.

There are lots of cool extra features, and you can get free spins if you collect five marching stacks that lead to new territories. In the free section, you can stay hot - hitting three special symbols gets you even more spins!

Pros:

• Exciting gameplay: Packed with nudges, free spins, and a collection mechanic.
• High winning potential: Win up to 10,000x your stake on any spin.
• Immersive design: Features Relax Gaming’s signature visuals for intriguing gameplay.

Cons:

• Availability: It can be hard to find at UK online casinos, limiting access.

You’ve probably guessed from the name - with Blood Suckers, we enter the world of vampires and one of the slots with the best odds to win. With a high RTP of 97.99%, it’s time to gather your courage and go on a vampire-slaying rampage! 

The game is a 5x3 layout with 25 paylines and a max win of 1,014.6x your stake. If you land three or more bonus symbols, you’ll enter the bonus round, where slaying vampires reward you with cash bonuses!

Pros:

• Recognisable slot series: NetEnt’s most iconic slot, known for its high RTP and lasting popularity.
• Heart-racing bonus features: The ‘pick bonus’ feature brings excitement and suspense.
• Seasonal appeal: Perfect for playing around Halloween to add a spooky touch to your gaming.

Cons:

• Visuals: The graphics are starting to feel slightly outdated, especially compared to newer slots.

As you can tell, I’m a big fan of the Money Cart games, but the numbers speak for themselves. With an RTP of 98% and a max payout of 5,000x your stake, Money Cart Bonus Reels definitely earns its spot on the list. 

If you have played the popular Money Train, all your favourite characters are back in this frantic and high-paced game. The Collector, Ms. Payer, and The Widener all carry a prize on their heads, and if you catch all three, you win the top prize. Easily one of the best payout slots.

Pros:

• Irresistible series: Superb adaptation of the smash-hit slot Money Train.
• More forgiving base game: Bonus games trigger more easily compared to its predecessor.
• The crew returns: All the modifiers you loved in Money Train are back.

Cons:

• Extreme volatility: Rated 4 out of 5 for volatility, it can make gameplay challenging, even for experienced players.

Just like Alice, it is time for you to explore the wonderland that is the White Rabbit Megaways. One of the casinos' biggest payout slot machines, White Rabbit, has an RTP of 97.24%. Where it really stands out though is its massive win potential of 13,000x your stake. 

Plus, this slot comes packed with four awesome bonus features and an even more exciting Megaways mechanic, giving you up to 248,832 ways to win on every spin. Now that’s what you call big-win potential! 

Pros:

• Megaways mechanic: With up to 248,832 ways to win on every spin, there's good potential for big payouts.
• RTP can increase: The base game has an RTP of 97.24%, but it can rise to 97.77% with the Feature Drop purchase.
• Superb graphics: BTG has created a visually stunning slot with impressive animations.

Cons:

• A lot going on: With its many features, it might feel too complicated for beginners to enjoy.

Jack Hammer 2 may be your standard 5x3 reel slot game, but what sets it apart is its incredible 99 paylines! That makes it one of the biggest payout slot machines in online casinos. 

Your goal as Jack Hammer is to save Pearl from drowning and you’ll be aided by the sticky win feature from the original game that returns for this version. You just need three matching symbols along a line to win, with Jack himself being the most valuable. With a 97.07% RTP and low volatility, you can expect frequent payouts to keep you going.

Pros:

• Play without using your cash: Win up to 20 free spins with eight or more scatters and play without draining your balance.
• Sticky wins: Every winning spin activates sticky wins, creating more chances for winning combos.
• Comic-book theme: Perfect for comic-book fans, featuring a fun and vibrant theme.

Cons:

• Lesser potential: Offers a smaller max win than the original Jack Hammer title.

Discover the lost city of Atlantis and hopefully get some big payouts with Secrets of Atlantis. The sunken city game offers an RTP of 97.07% with a big maximum payout of 3,200x your stake. 

There are a lot of different symbols, including animals and jewels, that combine in the 40 different ways you can win by playing this slot. The Oyster’s Pearl is the most valuable of the symbols, but make sure you watch for the Mermaid Nudge Wild. No matter when the reel stops she helps you cover the whole column.

Pros:

• Balanced wins: Medium volatility ensures a good mix of frequent smaller and occasional big wins.
• Exciting bonus features: Includes stacked wilds, nudges, highlighted reels, colossal symbols, and respins.
• Fantasy setting: A calming and mesmerising oceanic world brought to life with stunning visuals.

Cons:

• Limited availability: Not as widely available at UK online casinos as some other NetEnt slots.

When I talk about the highest payout slot machines, I’m referring to slots offering the highest return on your money. Not in the short term, but on average, over time. This means playing games with the best RTP (Return to Player) percentage at the best slot sites.

Let’s take Mega Joker by NetEnt as an example. With an impressive RTP of 99%, it’s one of the best payout slots. In theory, you’d expect it to pay out £99 for every £100 you wager. But keep in mind that the RTP percentage is a long-term average based on all players' bets and winnings.

Of course, you could win much more than 99%, but you could also end up with nothing. That’s the nature of these games, whether they’re the top payout slots or not. Still, it’s worth playing slots with the best payouts because, when you do win, the rewards are bigger.

The best way to think about high RTP slots is that they’re generally more generous than low RTP titles. But luck will always determine whether you’re the one to take home a share of that cash pot. There’s never a surefire guarantee, so keep that in mind when playing the highest payout slots.

I want to make sure you know that casinos can adjust RTP settings within a given range. It’s up to the site to choose which RTP they use, so it’s important to research this before playing. Finding casinos that offer the highest RTP can make a big difference in your potential profits.

Here's a quick table to help you visualise varying RTPs:

RTP is crucial because it tells you how much money you could expect back on your bets on average, making it an essential factor in assessing a game’s value. Factors like volatility and bonus features also affect gameplay, but RTP remains the main metric. It helps to understand a game’s payout potential.

Before a slot game is released, its RTP is calculated over millions of spins, and this percentage varies between games. This information is available to everyone, so it’s worth checking before playing.

Every online casino game has an RTP, including table games and live dealer titles. While slot RTPs often fall between 94% and 96% at UK casinos, table games like blackjack can have even higher RTPs. Choosing top payout slots can improve your chances of getting better returns.

Studying the payouts of each game is the easiest way to check the RTP for the best online payout slots. Here are my top tips:

• If it's a game we've written a review for, follow the link to the dedicated page. We'll tell you the RTP rate and detail gameplay features, bonuses, and other key stats.  
• If we don't have a review for the game, visit the casino site you know and trust. We list some of the best online casinos in the UK on this site, so take your pick. 
• Find the slot you want to play and click the ‘i’ icon in the paytable. Scroll past symbol payouts and bonus feature descriptions. Providers usually state the default RTP percentage under the game rules section.  
• If the paytable doesn’t have this information, visit the game developer’s website and check the RTP there. Most game studios make this information public.

In the previous sections, I explained why RTP is important - it provides valuable insight into your expected returns. Now, let’s explore other key metrics that make the best payout slots stand out.

RTP and volatility are best friends. RTP helps you find the highest payout slots, while volatility influences how often and how much you can win.

High volatility signals risky gameplay and low volatility slots offer fewer risks. These are the three main types: 

• High volatility: prepare for dry spells – these slots are budget eaters. But the potential payout can be very rewarding when a jackpot hits. 
• Medium volatility: medium volatility slots can offer small and big wins. 
• Low volatility: low volatility slots deliver modest but frequent wins - perfect for small budgets.

Most slot paytables will tell you how volatile the game is. If not, read our online slot reviews – we always include RTP and volatility.

Jackpot slots come in two types: fixed and progressive. 

Fixed jackpot slots offer in-game prizes that don’t increase in value. Progressive jackpots grow as more people play the game and often snowball into millions. For example, Jon Heywood won a record-breaking £13.2 million jackpot with a mere £0.25 on Mega Moolah. 

This is possible because a small percentage of each bet from millions of players worldwide is put aside and added to the jackpot prize total. The jackpot will reset and climb when someone like Jon wins it. 

With the potential for large jackpots, progressive slots are often seen as some of the best payout online slots UK casinos offer. But as the jackpot pool grows and more people play, your chances of winning the top prize decrease. High volatility and lower RTP also make wins less predictable

Here are the three progressive jackpot slots I recommend trying.

Invented by Big Time Gaming, Megaways is a pretty cool slot mechanic. It gives you up to 117,649 different ways to win on every single spin. 

Dragon Born was BTG’s first Megaways game, but Bonanza made this engine famous. Many developers have remastered popular titles into Megaways versions to meet the demand for such slots.

Visually, they’re like the usual video slots online but don’t use the standard paylines. Instead, each time you spin, the size of the reels will change – each reel can have up to seven symbols. This means that sometimes you’ll have more symbols and rows, and other times you will have fewer.

Sounds complicated? It is, and it isn’t. You win if you match three or more symbols in a row on neighbouring reels. It’s even better if Megaways slots have tumbling reels, as they can offer many wins on the same spin. 

If you’re looking to play Megaways slots, here are some titles I’d point you in the direction of: 

• The Dog House Megaways
• Bonanza Megaways 
• Big Bass Bonanza Megaways 
• Gonzo’s Quest Megaways
• Eye of Horus Megaways

Spins bonuses are a game-changer when it comes to making your funds go further. They’re like little gifts you get from the casino on sign-up or when you deposit. 

When joining a new casino with a free spins bonus, you can play slots without dipping into your own funds. Spending less money at the outset is always a good tactic for tipping things in your favour right from the get-go. 

Many of our favourite online casinos offer them for free as extra promotions to keep the fun going. Some are free from wagering requirements, so you can keep what you win.

While you’re here, check out these three of the best free spins promos available right now. But before claiming any spins promo, always remember to check the bonus terms. Not all slots qualify for free spins promotions. 

Moreover, only certain payment methods may unlock the offer. Plus, you'll usually need an initial deposit to kick things off. Still, these deals are an excellent way to get some extra bang for your buck - just check that small print. 

Want to compare games? We designed this tool to help you choose the slot games that best suit your playing style.

To get started, select a few games from our lists above or any other titles you know and like. The tool will create a side-by-side comparison so you can choose based on the best payouts and other stats.

Note: slot comparison tool will open in a new window. 

Our top online casinos partner with reputable software providers to fill their libraries with the the best payout slots. The more studios a site partners with, the more high-RTP slots it can offer, increasing your chances of winning prizes.

It’s wise to pick a casino with multiple game developers offering higher RTPs and payouts. The industry names listed below are known for their generosity.

It’s all well and good finding a big payout slot game, but how do you play it smart? Here are the top tips from our casino experts on how to make the most of these titles.

Looking for free bonuses is always a good idea. 

The best paying slots sites often offer free spins as part of a welcome offer. Some may even have no wagering requirements, allowing you to keep all your winnings.

Still, always remember to read the small print to check the rules, such as game exclusions, validity, and winning caps.

Playing slots in demo mode is smart, whether it’s time-tested titles or new releases. This way, you can test every bonus round and feature without risking your money. And if you don’t like it, you haven’t spent a penny on these free slots in the UK.

Not all casinos offer demo play, but if you can, play for fun to see how the game behaves and only then bet real money.

It’s tempting to keep playing even when you are losing. But setting a budget and sticking to it is more fun than chasing losses. 

If you keep landing false or empty spins, it’s time to step back and reevaluate your strategy. You can always try using the casino’s deposit limit tools to help you manage your spending.

Don’t follow the crowd; play games that are right for you.

Work out what kind of games suit your playing style and budget. Do you prefer high-risk games that pay out big but rarely, low-risk games that pay out small but often, or something in the middle?

Choosing a suitable level of volatility will only improve your gameplay experience.

Remember to gamble responsibly. The best strategy you can have is to know your limits. It’s easy to get over-excited about landing prizes, but make sure you’re not losing more than winning. 

Play smart by setting limits and keeping your budget in check. Gambling is meant to be fun, but if it’s not anymore, be ready for a quick cool-off.