Best UK online slot sites & real money slot games 2024
Play 15,000+ free slot games from market-leading game providers, like Netent and Pragmatic Play, and win real money at top slot sites offering over 100 free spins to claim. We've got you covered whether you're looking for jackpot slots, classic slots or something a bit different.
Every now and again, we come across a casino that we recommend you avoid playing on. We have a strict 25-step review process, looking at things like a site’s software, promotions, how easy the banking process is, security and more. When any of these steps fall below our standards, the casino is added to our list of sites to avoid.
"Having worked extensively within a top UK operator and testing 1,000+ games from over 30+ of the most recognisable game providers worldwide, you really get an understanding of what makes a slot game special. The UK market is bursting with new games almost daily meaning there's always new bangers on the horizon to slot into your 'must play' list like Big Bass Bonanza, Eye of Horus or Gold Blitz. Do your research and understand what really appeals to you; whether it be juicy jackpots, high RTP titles or a truly exciting bonus round including top mechanics like free spins, Hold & Win or special original bonus games."
Not ready to play for real money? Try our top slots for free!
At Casino.org, we've got over 15,600+ slots and casino games from the best studios around.
You can play for free here to get an idea of what you like and then play for real money at our top recommended sites when you are ready.
Here are some of our expert team's personal favourites to get you started:
The best UK online casinos for real money slots 2024
Need help looking for your perfect online casino? We've done the research and given you a handy list of all of the best casinos based on what you'd be looking for when choosing a casino site.
Check out the table below and get started with the highest number of games, best bonuses and the fastest withdrawals in the UK, selected by yours truly just for you:
Betway (125 Free Spins with no wagering requirements)
The best 10 online slots reviewed 2024
With so many games to choose from, there are always a few titles that grab your attention. These are the online slots that are the 'certified bangers' of the batch that you should give a shot. Learn why our experts chose these as their top 10 slots for UK players.
🎣 Biss Bass Bonanza - Pragmatic Play
Pragmatic Play's premiere title, Big Bass Bonanza packs the boat with more than a few bass-cinating reasons to play. Featuring up to a 200x max win in the base game, and a whopping 2,100x in the free spins mode, Big Bass Bonanza has cemented itself as a top pick for slots players with 5 of our 10 top listed slots selecting it as part of their welcome bonus.
💡 Editor's insight: "An instant hit that has led Pragmatic Play to release a series of variations and competitors to create various imitations. It is hard to beat the original though and is one of my favourite slots of all time. Just last weekend I racked up a £200 win on Big Bass Vegas Double Down Deluxe." William Macmaster, Casino Expert
🕹️Player Review: "Whether you're a beginner or a pro, Big Bass Bonanza has something for everyone. The game is easy to pick up, yet there's enough depth to keep experienced players engaged. Highly recommend!" Brian, GB. 30th August 2024, TrustPilot.
Expanding on the Wild West action of the original, Money Train 2 adds even more to its arsenal by upgrading the total number of bonuses from 5 to a whopping 11 in the bonus game. The title also boasts one of the highest RTPs in the UK market with 98% and coupled with its 50,000x max win; there are chances to bag some big wins.
💡 Editor's insight: "A big win max win and a high RTP should already be enough to convince you to play this slot. It is one of my personal favourites and its unique concept contributes to that. There are a few sequels to this slot so try these out if you like what you see." Lewis Crane. Casino Expert
🕹️Player Review: "Money Train 2 is a highly volatile game, so the results are very up and down. However, it's usually very consistent with this if your sample sizes are large enough. It's consistently volatile I guess you could say." User Reddit, September 2021
Expanding on the established mechanics of Novomatic's Book of Ra, Play'n Go expands the action in Book of Dead. Featuring a boosted RTP of up to 96.21%, the title has a much higher chance of spinning a winner than Novomatic's original 92.13%.
💡 Editor's insight: "An all-time classic. The first of the Rich Wilde slot series, Book of Dead has been engaging players for 8 years and remains a popular favourite. The slot is one of the most popular slots to pick up free spins on too, so there is always a chance to get some bonus gameplay on it too." Lewis Crane, Casino Expert
🕹️Player Review: "Whether you're a beginner or a pro, Big Bass Bonanza has something for everyone. The game is easy to pick up, yet there's enough depth to keep experienced players engaged. Highly recommend!" Hungry_Honey_6485, June 2024, Reddit
⭐ Casino.org rating: 4.6/5 | 🏅 Best slot for: High volatility
Starburst is considered a staple of the UK slot scene - and for good reason! Load the rocket and blast off to an adventure beyond the stars that offers 10 potential paylines to match up to 250x in real cash prizes. The title's Low volatility makes it a favourite as the chance of wins are frequent on every spin.
💡 Editor's insight: "A staple of the slot world. The shine that Starburst once had may be fading but it remains a popular slot for purists. For those looking to spice up an old favourite, you can try Starburst XXXtreme which has higher volatility and 200,000 x stake max win." Adam Volz, Casino Expert
🕹️Player Review: "Starburst might not be the favourite for everyone, but its cool looks, easy gameplay, a chance to win big, and good reputation have made it super popular. " Zein101, March 2024, Reddit
Slot fans have been going barking mad for The Dog House due to its inviting animal theme and whopping 6,750x max win. The High volatility also appeals to players as the chances of hitting big wins on any successful spin are much higher than titles like Starburst or Big Bass Bonanza.
💡 Editor's insight: "One of the most popular Megaways slots around and another top choice from the team at Pragmatic Play. The game is packed with multipliers attached to wild symbols which encourage consistent wins. The free spins round can be tricky to trigger but a good round there can make all the difference" Ian Zerafa, Casino Expert
🕹️Player Review: "The Dog House is a high-volatility slot that’s all about the Free Spins feature. When it hits, the sticky wilds and multipliers can deliver some hefty payouts, but getting there can be a grind. " Hungry_Honey_6485, August 2024, Reddit
It's time to go ape with the premiere primate in King Kong Cash from Blueprint. This primate packs a punch with up to a 50,000x max win and up to an impressive 14 unique bonus games to unlock. The Low-Med volatility also means it doesn't take long before a player can record a winning spin; with prizes much juicier than the likes of other low-volatility slots like Da Vinci Diamonds or Butterfly Staxx.
💡 Editor's insight: "I must admit this is not my favourite slot but it could be right for you. The reason for this is simple. The max win. With such a high amount on offer, big-win hunters will be hard-pushed to find a better alternative. I would advise the sequel "Even Bigger Bananas" for an upgraded experience. " William Macmaster, Casino Expert
🕹️Player Review: "If you’re looking for a slot game that offers excitement and potential big wins, King Kong Cash is not it. It might have been fun back in the day, but now it just feels outdated and stingy with payouts." Hungry_Honey_6485, August 2024, Reddit
Like Starburst, another Netent slot on our top slots 10 list, Gonzo's Quest is a well-established fan favourite in the UK. The 3D graphics of Gonzo and the innovative Avalanche reels feature have cemented the game as a top title for UK players. Gonzo's Quest also features special multipliers in both the base game and free spins meaning you have the chance to unlock additional bonuses right from the first spin.
💡 Editor's insight: "A mainstay of the casino world. Gonzo's Quest has lasted the test of time with many of its innovative features still holding up to this day. Plenty of potential from this slot and one that I anticipate to be popular for a while longer." Lewis Crane Casino Expert
Sweet Bonanza offers players plenty to sink their teeth into! The title is an innovator of the popular 'Pay Anywhere' feature where symbols can pay regardless of position on the reels. Sweet Bonanza's Medium volatility also means there's a fair chance to trigger a win on any given spin; with cascading reels on every win for even more chances to match consecutive wins when they trigger.
💡 Editor's insight: "A slot with an impressive max-win this has been spurred on by the impressive multipliers the game boasts. Bright, colourful and fun, playing this game is always sweet." Adam Volz, Casino Expert
🕹️Player Review: "I’d say *Sweet Bonanza* is definitely worth a try, especially if you’re into colorful and dynamic slots. The cascading wins make each spin feel more engaging, and the free spins feature with those juicy multipliers really gives you something to look forward to." BabyHalf5196, Reddit, September 2024
⭐ Casino.org rating: 4.7/5 | 🏅 Best slot for: Multipliers
🤞 Volatility - Med-High
✖️ Max payout - 21,100x
💸 RTP - 96.60%
🎰 Best casino to play: Jackpot City (100% up to £100)
A favourite of the land casino, Rainbow Riches has cemented itself as an easily recognised slot in the game. The game features 3 highly interactable bonus games that have you rolling dice, spinning wheels or picking pots giving players a bit more than just a set of reels to spin. The Medium volatility also makes the title very accessible as every spin has a decent chance of triggering a win with up to 500x up for grabs.
💡 Editor's insight: "Rainbow Riches has been on the casino circuit for a whopping 15 years and so it sometimes feels antiquated. That doesn't stop players from flocking to it every day. So much so that the slot led to the conception of a full online casino sharing the same name. A retro slot with lots of character." Lewis Crane, Casino Expert
🕹️Player Review: None available at this time.
⭐ Casino.org rating: 4.75 | 🏅 Best slot for: Luck of the Irish theme
🤞 Volatility - High
✖️ Max payout - 500x
💸 RTP - 95%
🎰 Best casino to play: Rainbow Riches Casino (30 no deposit free spins)
The sequel to the massively popular Gold Blitz, Gold Blitz Extreme takes the solid foundation of 2022's original and supercharges it with brand-new features and a boosted max win of up to 5,500x (500x more than the original). The title retains the High volatility and 96% RTP of the original also, meaning that all of the additional features come without any compromise on what made the original so iconic to players.
💡 Editor's insight: "The new and improved version of "Gold Blitz" takes things up a notch with a few extra features that the original lacked. If you liked the classic version, this will be the perfect step up." William Macmaster, Casino Expert
🕹️Player Review: "Gold Blitz Extreme is a thrilling game if you enjoy the high-risk, high-reward scenario. Just be prepared for some nerve-wracking moments and have a good strategy for managing your bankroll." BabyHalf5196, Reddit, June 2024
⭐ Casino.org rating: 4.3 | 🏅 Best slot for: Jackpots
🤞 Volatility - High
✖️ Max payout - 5,500x
💸 RTP - 96%
🎰 Best casino to play: Neptune Play (100% up to £100)
"The games selected are the cream of the crop for UK online slots based on their popular themes and exciting mechanics. These are the titles that sit at the top of most UK casino lobbies and will sometimes make part of their welcome bonus. Big Bass Bonanza is a particular favourite of mine and makes up part of the welcome offers for top casinos like HeySpin and Mr Mega."
The best new slot releases for 2024
Every single day brand new slots hit casino game libraries across the UK. Here are some top picks you should look out for in the coming weeks and months.
🎰Slot
⚙️Software Provider
📅Release Date
Oodles of Noodles
Reel Kingdom
🔥Out Now
San Quentin 2: Death Row
NoLimit City
🔥Out Now
Egypt Clusterbuster
Red Tiger Gaming
🔥Out Now
Odin Lightning Blitz
ReelPlay
🔥Out Now
Wisdom of Athena 1000
Pragmatic Play
September 30th, 2024
Twister
NetEnt
October 1st, 2024
Dog House - Mutley Crew
Pragmatic Play
October 3rd, 2024
Los Muertos Locos
Max Win Gaming
October 9th, 2024
Howling for Gold
Booming Games
October 10th, 2024
Ms Robin Hood
NetEnt
October 15th, 2024
Discover the best new slots
Want to try something new? Our new slots page has the info you need about new slot games and sites that bring you the most cutting-edge and innovative experiences in the UK!
Naturally, the slot game selection offered is a crucial element in our rating system for UK slot sites. Our benchmark for a slot site to be considered one of the best is 1000+ games to give players the widest possible selection. Sites like Pub Casino and All British Casino house an extensive collection that continues to grow almost daily; so why settle for any less than the best?
Bonuses and promotions
Every online casino has something to offer and we make it a priority to recommend only the best available.
For a slot site, Free Spins are what we look for first and foremost with sites offering on top titles like Big Bass Bonanza.
When it comes to bonus cash amounts, 100% up to £100 is the standard, so we like to see that as a welcome bonus to get the ball rolling - with anything over that being a major plus to any casino.
Mobile compatibility
Since 2020, over 50% of all casino users are spinning on their favourite titles on the go. Therefore, mobile compatibility sits as of particular importance when it comes to how we evaluate a casino.
While a mobile site is a great start, a mobile app will help a slot casino score highly! The best mobile casinos in the UK like All British Casino offer native app functionality that can further streamline your casino play and get you right into the action in seconds.
Customer support
If you ever have any queries or issues at one of our recommended slot sites, they can be resolved quickly and easily by their experienced customer support team who will be on hand to help you out.
All will offer an email support system, with many offering round-the-clock live chat or a telephone number to talk to someone directly. Both of these additional customer support methods go a long way as solidifying a casino as a top choice for UK players as it streamlines the experience and gives options on how to get the best solution for your query.
Reputation and regulation
Reputation and regulation are vital to how we recommend online casinos. We are always looking for licensing from the United Kingdom Gambling Commission and proof of regulation from eCOGRA to ensure we are only recommending the most legitimate casinos in the market.
How to play online slots
Slots are the #1 most popular type of online casino game in the UK and it's not hard to see why. Online slots are simple, fun, and can be packed with tons of unique features and bonus games. Whether you're a slots veteran or delving in for the first time, check out our step-by-step guide and you'll be spinning like a pro in no time.
Step 1 - Choose one of the top-rated slots sites from our toplist
Complete their sign-up process by registering your details. Most will come with a bonus for new sign-ups like free spins or bonus funds to help get you started.
Step 2 - Explore the casino's slot library
Once signed up, access the "Games" section of the casino to see what slots they have available for you to play.
Step 3 - Find the perfect slot for you
Filter slots based on game providers, slot type, or theme. Select a game of your choice and wait for it to load up.
Step 4 - Understand the game mechanics
Check the paytable options on any game to get an understanding of how to play, the available paylines, and all of the exciting bonus features to discover.
Step 5 - Choose bet size and spin
Choose your bet level by using the '+' or '-' or press spin to begin. Higher bet values do mean higher potential wins, but it makes bigger losses more likely too! Play responsibly and always stay within your means.
Step 6 - Inspect your spin outcome
Once the reels have finished spinning, wins are calculated with 3 or more matching symbols being a standard for triggering a win.
Step 7 - Look for bonus rounds to trigger bigger wins
Some slot games can include bonus base game features that can trigger on any spin including win multipliers, cascading reels or special Wilds that will substitute for any symbol in a win.
Slot game symbols and bonus features you should know
There are two elements of online slot gameplay, the base game and bonus rounds!
🎰 Base game
The base game in a slot is where you start whenever you load up an online slot. In this mode, you will attempt to turn your spins into cash by lining up symbols on the slot reels in what is known as "paylines" or "win lines".
Different symbols will have money values with higher-value symbols offering you better payout amounts if you line them up. Paylines and symbols will vary from game to game with some offering more than others.
As well as standard paying symbols, most slots also have special symbols that can add extra surprises to your gameplay. The most common you can find on any spin are "Wilds", "Multipliers" and "Scatter Symbols".
"Wilds" can be found on most slot games and can act as any paytable symbol when a win is triggered on the reels. Wilds can also sometimes have cash values of their own and be matched as their own symbol type.
"Multipliers" can appear in popular slot titles as part of existing symbols or as their own unique symbol. When matched on a winning spin, Multipliers can add to your total win value by adding a times multiplier to the value. No need to bust out the calculator as you can see your wins doubled, tripled, or even supercharged with up to a 10x win multiplier.
"Scatter Symbols" can be found on many slot games and are the key to unlocking special free spins modes or bonus games. Match 3 or more anywhere on the reels and you've punched your ticket to some extra games.
🏆 Bonus rounds
Bonus rounds come in many forms and generally take the form of a "free spins" round. You will be awarded a number of spins that do not deduct from your cash balance and tick down by 1 each time you spin.
During a free spins round, any number of other special features can trigger to boost your overall winnings during the round. At the end of the free spins round, you will be awarded the total amount won in the free spins round directly into your casino credit.
Titles like Big Bass Bonanza or Immortal Romance further spice up the experience with additional features unique to their free spins mode. Big Bass Bonanza features an exclusive 'Cash Collect' feature that allows for up to 2,000x in instant prizes while Immortal Romance has up to 4 unlockable free spins modes; each with their own set of character-themed bonuses like multipliers and Wild symbols.
During a bonus round, you can activate a number of additional features including:
Stacked Wilds - Prominent in titles like Book of Dead and Eye of Horus, some bonus rounds will add Wilds that will stack to turn entire reels Wild; covering multiple paylines for wins.
Unlockable Reels - Some bonus rounds will give you even more space to spin with additional reels and expanded paylines for even more chances to win.
Random Modifiers - These can be found in a number of titles and will add special enhancers to your spins including random Wilds, win multipliers, giant paytable symbols, extra spins and more.
Win Boosters - Games like Enchanted Prince and Sugar Train award an instant multiplier for every win during the free spins mode to help boost your total values.
Other slot game features
The below features can appear either in the base game or the bonus round, depending on the game you are playing. Many online slots will offer some of these features but each game is different and will offer varying features including:
Feature
How it works
💧Cascading Reels
Symbols that disappear when matched in a payline causing the reels to drop down and add even more symbols onto the reels. These new symbols can then cause a medley of winning combinations with each consecutive win adding even more symbols.
📈Win Multipliers
An element of the game where winnings are multiplied gradually (1x each win) as your number of consecutive symbol matched grows.
🔄Respins
A free new spin that occurs after a paid or bonus spin due to an in-game event, giving you a second chance to win on that spin.
↕️Expanding Wilds
Wilds that extend to cover whole reels when triggered to turn the entire reel Wild and give a higher chance of activating a winning payline.
💥Exploding Wilds
Wilds that explode when triggered, causing new symbols to appear on reels close to the exploding wild.
What our experts say
Lewis Crane, Assistant Gaming Specialist
"Be mindful that not all slot games offer bonus rounds. Classic slot titles like 7s Deluxe or Burning Wins streamline the experience with just 5 available paylines and no bonus game to keep that retro slot machine feel. Always check the paytable to get an idea of what a game has on offer when it comes to bonus rounds."
Types of UK online slots
There are over 28,000+ available online slot games and they all come in different shapes and sizes. Each slot is its own adventure and can differ greatly from game-to-game. Take a look at the varieties below for an introduction to the different types of online slots in the UK.
Classic slots
Three-reel slot games are based on classic fruit machines found in land casinos. This type of slot machine usually features classic symbols like fruit and playing cards. To win, simply line up three matching symbols on a single payline. Three-reel games generally do not include a bonus game and use additional symbols like Wilds very sparingly.
Multi-reel or multi-payline slots give multiple winning combinations across the reels. Typically, the number of paylines can be anything from 25 to well over 100 and stretch diagonally, horizontally, in a V-shape or even zigzag over the reels. Tap below to play slots online for free and try out plenty of multi-reel games!
Video slots are another form of online slot machine. This type of slot tends to offer a more immersive experience and allows players to win through interactive bonus features or 3D animation. Most online casinos will have a good range of video slots including games like Wheel of Fortune, Thunderstruck II and Wizard of Oz.
Progressive slots offer a jackpot that increases every time a bet is made and won. Essentially, a small percentage of every winning bet goes towards the jackpot. For top games, the final prize can reach well into the millions including jackpot mechanics like Jackpot King or WowPot. Most online casinos will differentiate between a classic slot and a jackpot slot. To try progressive slots for yourself, head to our free games section below.
When Megaways began appearing on online slot site game libraries courtesy of Big Time Gaming, players instantly went crazy for the ability to benefit from more paylines than ever before. Thanks to a random reels modifier, with each spin you make, the paylines change. This equates to a massive 177649 total possible ways to win when you play on Megaways slots!
Keep your eyes peeled for the special Megaways tag on certain slot games to try them out for yourself including Bonanza, The Dog House Megaways and Big Bass Bonanza Megaways.
Must, Daily and Mega Drop Jackpot slots
Coming from the masterminds at Red Tiger, these twists on the classic progressive jackpot style mean that players can better predict slots that are about to pay huge winnings to lucky players. Must Drop jackpots indicate a slot where the winnings must be won before hitting £1000, Daily Drop jackpots mean that prizes are guaranteed before 22:00 GMT each day, and Mega Drop Jackpots will drop before a maximum value - which can max out as high as £15,000!
High volatility slots
For those looking to play the long game, high volatility slots are perfect for them. These use a mechanic where wins come less frequently but when they do come, they provide much larger win amounts. Hence, while you may not get a win for a while, when it does come, it will be worth the wait.
3D slots
3D slots take the impressive graphics of online slot games a step further with cutting edge 3D graphics that take the game to a whole new level.
Immerse yourself in your slots fun in a whole new dimension on titles like The Rift and Jungle Jim or browse the list below.
Maximum win slots
Maximum win slots are the best of the best when it comes to winning potential. All slots offer a limit to how much can be won but max win slots are games that blow other slot winnings out of the water. Ranging from as high as 200,000-300,000x your bet amount, they can see even modest bets pay out significant sums!
Keep in mind that, for most maximum win games, the top payouts are only available when playing at the highest potential bet levels. Ensure that you always play responsibly and only up your bets when you feel comfortable to do so.
Bonus buy slots
Many online slots offer a bonus round which gives players the chance to potentially win more when it is triggered. With bonus buy slots, players can pay to bypass the normal gameplay and dive straight into the bonus round giving them the chance to play the bonus round and potentially cash in. Please note though that these types of slots are prohibited in the UK.
Read more about slots strategies
Online slots are entirely reliant on chance, but that doesn’t mean there aren’t things you can do to put yourself in a better position to win. Experienced players follow a distinct strategy, like only playing games with the highest payout percentages, practising their bonus rounds and knowing their paylines inside and out. Follow these guides to give yourself the best possible chance to win.
What is a payout percentage?
As a slots player, the payout percentage (RTP) indicates to you how much of your money bet will be paid out in winnings. Every slot and casino game has an RTP percentage that can be found in the paytable with most slots in the UK having an average of 95%-96%+ depending on game and provider.
💡Expert insight: "Remember that RTP is calculated on average over 1,000,000+ spins and is a guideline on what you could win. Your personal RTP can be higher or lower depending on how you play as RNG still plays the biggest factor on if a spin will be a winner or not."
Check out the table below for a clear understanding of how RTP & volatility can affect your average slots experience including what makes them different.
Online slots by highest RTP in 2024
Every online slot has a built-in RTP percentage that is different for each game played. In the UK, 95%+ is seen as the standard for a solid game RTP with titles frequently hitting the 96%+ range to better cater to players.
The following slots offer some of the highest RTP (Return-To-Player) in the UK to help maximise your chances of spinning a winner. Spin on the best RTP online slots including:
Rank
Slot Game
Developer
RTP
1
1429 Uncharted Seas
Thunderkick
98.50%
2
Bloodsuckers
NetEnt
98%
3
Money Train 2
Relax
98%
4
Blood Suckers Megaways
Red Tiger
97.66%
5
Aztec Powernudge
Pragmatic Play
97.57%
6
Sugar Rush 1000
Pragmatic Play
97.50%
7
Wild Swarm
Push Gaming
97.03%
8
9k Yeti
4ThePlayer
97%
9
Fruit Warp
Thunderkick
97%
10
Gorilla Gold Megaways
Blueprint
97%
RTP vs Volatility - what's the difference?
Understanding game, odds, and payout mechanics is crucial for all areas of online gambling. For slots, there are two key aspects to understand. Return to Player rate (RTP) and "Volatility" also known as variances. Our experts have broken them and compared them so you know the difference.
RTP (Return to Player)
Volatility
RTP indicates the average monetary return a player can expect when playing a slot game over a long period of time.
Volatility indicates the likelihood of a slot triggering a win on any given spin and also has a factor in determining the total win value of each successful spin.
RTP is calculated as a percentage out of 100% with most slot games ranging from 88%-96%+ depending on market and configuration.
Volatility is measured on a scale of Low-High with each slot having 1 of 5 preset volatility levels from Low, Low-High, Medium, Med-High, or High
Higher RTP games are objectively better for your gameplay than lower RTP slots as the chances to win are statistically higher on average.
While volatility has an impact on your playing experience, no specific volatility is objectively better and will depend on what you prioritise as a player between frequent wins and high value wins.
For example: A slot with an RTP of 98% will, on average, return £98 for every £100 spent on bets.
For example: A low volatility slot will have a higher chance of triggering a win on any given spin but the overall payout values will be lower than a high volatility slot.
My one top tip for playing online slots?
Steve Bourie - Author of the American Casino Guide
"Don't overbet your bankroll. The point of playing in a casino is entertainment. You want your money to last as long as possible. Don't go betting $10 a spin, or buying $50 bonus rounds if you only have $200 to play with. Also, find a game that matches your play style. If you like lots of small wins, find a game that is low volatility, if you like bigger wins less often, find a high-volatility game."
Slot bonuses and promotions in the UK
Free spins
Sometimes referred to as "Bonus" or "Extra" spins, free spins are a number of spins a casino will award you when you make a deposit. You can generally get between 50-200 free spins when you make a deposit to use on selected slots.
💡 Example: Deposit £20 and earn 100 free spins on Book of the Dead
✖ Typical wagering: 35x
▶️Available at: Neptune Play, Grand Ivy, Dream Vegas
No deposit free spins remove the need for a deposit to earn bonus spins. Register your details and you will earn a small number of free spins on selected games.
💡Example: Register your details at a new casino and earn 5 free spins on Diamond Strike
Wager free spins remove the need for wagering so you can keep what you win. Make a deposit and earn your spins. Any winnings you make will then be yours to withdraw.
💡Example: Stake £20 and earn 100 wager free spins on Fire Joker.
These offers are all about bonus cash. Make a deposit and the casino will match your deposit with a bonus percentage. You will then have your deposit amount plus the bonus cash.
💡Example: A 100% up to £100. Deposit £100 and get £100 in bonus cash. Making your total balance £200.
✖ Typical wagering: 35x
▶️Available at: Pub Casino, Jackpot City, All British Casino
The online casino scene in the UK is packed with iconic titles from some of the most recognisable software providers worldwide. When it comes to video slots, these guys know their stuff with high production value and a wealth of experience that goes into the creation of every curated online slot game.
💡Expert insight: "Remember that not all slots are the same as each provider loves to add their own signature touches to each title. Play a variety and you might start picking up on some of the flavours that separate a Pragmatic Play slot from a Blueprint slot".
Here are some of our favourites to look out that can showcase an outstanding games library at a top online casino:
Blueprint
Hitting the gaming scene in 2001, Blueprint has cemented itself as one of the UK's top software providers with top-performing titles like Fishin' Frenzy and Eye of Horus. They have also successfully converted film and TV shows, like The Goonies and Rick and Morty, into thrilling slot games. The provider has also solidified itself in the slots market with its legendary Jackpot King progressive jackpot feature that has risen to over £1,000,000.
📍 Established: 2007
🎰 Number of slots: 200+
🌟 Popular slots: Fishin' Frenzy, King Kong Cash, Eye of Horus
Playtech
The world's largest supplier of online games, Playtech has stamped its mark in over 40 regulated jurisdictions and has a presence in over 180 countries worldwide. The provider boasts over 300 original slot game titles including the legendary Age of the Gods series and a plethora of licensed slot titles based on some of your favourite properties like Superman, Gladiator and The Matrix.
📍 Established: 1999
🎰 Number of slots: 300+
🌟 Popular slots: Age of Gods, Buffalo Blitz, Epic Ape
Apricot (formally Microgaming)
One of the leading gaming providers in the industry, Apricot Games, formally known as Microgaming, boasts over 1,300 games from over 40 independent gaming studios. Each studio brings a unique flavour to the iGaming world and includes studios like JustForTheWin, Gameburger, and PearFiction.
📍 Established: 1994
🎰 Number of slots: 1300+
🌟 Popular slots: Mega Moolah, Thunderstruck II, Immortal Romance
Pragmatic Play
A relative newcomer in the online gaming scene, Pragmatic Play have wasted no time in becoming one of the most recognisable casino brands in the UK market. Boasting a collection of over 500 original slots and casino games, the provider has taken the gambling world by storm with its Big Bass Bonanza series which still regularly appears as part of top casino's welcome offers.
📍 Established: 2015
🎰 Number of slots: 500+
🌟 Popular slots: Big Bass Bonanza, The Dog House, Gates of Olympus
Light & Wonder (formally Scientific Games)
This Las Vegas-based outfit is one of the oldest software providers in the UK and has more than a few iconic titles under its belt. UK punters need not go far to come across a few recognisable titles from the provider including Spartacus, 88 Fortunes and the iconic Rainbow Riches which now boasts over 25 original titles in the series alone.
📍 Established: 1973
🎰 Number of slots: 100+
🌟 Popular slots: Spartacus, 88 Fortunes, Rainbow Riches
Netent
A powerhouse in slot game innovation, most of the top 20 UK slots played every year have come from their studio, including classics like Gonzo's Quests and Starburst. In 2020, Netent was merged into the Evolution casino brand to bolster its slots portfolio alongside other studios like Red Tiger and NoLimit City.
📍 Established: 1996
🎰 Number of slots: 200+
🌟 Popular slots: Starburst, Dead or Alive II, Gonzo's Quest
Best online slot themes
One of the biggest factor that help determine the popularity of an online slot is the wide variety of slot themes available. Whether you're looking to dive below the waves, explore ancient temples in search of Egyptian treasure, or fancy a jaunt over the Irish hills; there's a slot to fit every tastes.
Need a hand getting started? Check out some of the top titles below centred around some of the most popular slot themes in the UK.
What our expert says
Lewis Crane, Assistant Gaming Specialist
"Slot themes have more of an impact for UK players in picking their favourite games than any other factor. From my experiences working within UK operators, fishing and Irish slots are particularly popular with titles like Big Bass Splash and 9 Pots of Gold frequently appearing in an online casino's top 50 best performing games."
Best fishing slots
Fishing games are the undisputed king of the UK slots gaming scene with more than a few worth hooking for your list of faves. Check out some of the most popular fishing slot titles including:
Fishin' Frenzy - Blueprint
One of the first big fishing games to hit the UK slot scene, Fishin' Frenzy was the inspiration for other top fishing titles including Big Bass Bonanza and Wild Wild Bass 2. Check out what makes this title a standout including:
✅ 50,000x max win
✅ 96.12% RTP & Low volatility
✅ Free spins mode with instant cash collect symbols
Fans of Big Bass Bonanza should be right at home in this supercharged version of the original title. Featuring tons of extra bonuses, Big Bass Splash upgrades the Big Bass Bonanza formula including:
✅ 5,000x max win (2,900x more than Big Bass Bonanza)
✅ 96.71% RTP & High volatility
✅ Upgraded free spins mode with additional win modifiers & features
The fishing action just got bigger with one of the most popular titles from UK casino staple; Inspired Gaming. Check out what makes this Inspired's premiere fishing title including:
Irish games are another popular slot theme with plenty of ways to go over the rainbow in search of gold. Some of the earliest slot machine titles are Irish-themed and the trend continues in some of the most popular online slots including:
9 Pots of Gold - Games Global
One of the premiere slot titles from Gameburger Studios, 9 Pots of Gold adds plenty of pots to turn into cash prizes. Check out all of the key features that make this a top title including:
✅ 2,000x max win
✅ 96.24% RTP & Medium volatility
✅ 2 bonus games including free spins and Epic Strike instant cash prizes
One of Blueprint's most popular Irish slot series, Luck O' The Irish has cemented itself as a player favourite with more sequels than you can shake a rainbow at. Check out what makes this a top title including:
✅ 2 bonus games including an instant prize wheel with up to 2,000x in cash prizes
✅ 95% RTP & High volatility
✅ 13+ games in the series including Megaways, Jackpot King and sequels with additional bonus games
Expanding on the Rainbow Riches mega-hit, Rainbow Riches Megaways boosts the action with some new features and ways to win. Check out all of the improvements including:
✅ 117,649 ways to win (Only 20 in the original)
✅ 95.90% RTP (95% in the original)
✅ New free spins mode with an unlimited win multiplier on every win
Indiana Jones isn't the only lover of ancient Egyptian treasures as players love stepping back into the tombs of the past. From desert sands to abandoned tombs, to gods and forgotten royalty; Egypt hides many secrets to enjoy. Grab your adventurers hat and check out some of the top titles including:
Eye of Horus - Blueprint
Eye of Horus, and its Megaways counterpart, stand as some of the most popular Egyptian-style slots in the online gaming scene. Featuring up to 20 available paylines and 50,000x your total bet in real cash prizes, there's plenty to enjoy including:
✅ 96.31% RTP & Medium volatility
✅ Free spins mode with upgradeable Wild symbols
✅ Sequels including Megaways and Jackpot King variants
Before there was Book of Dead, Book of Ra was innovating the slot game with the special 'Book of' bonus feature. Upgrade the experience in Book of Ra Deluxe with the following improvements:
✅ 95.10% RTP (Up from 92.53% for the original)
✅ 10,035x max win (Up from 5,000x for the original)
✅ Multiple bonus games including free spins and a 50/50 win gamble feature.
One of the most popular Egyptian titles since its release in 2012, Cleopatra has retained its cult status due to its accessibility and easy gameplay loop. Discover why the queen of Egypt rules the scene including:
✅ 95.70% RTP & Medium volatility
✅ Free spins mode with all wins tripled for the duration
✅ 8+ Cleopatra titles including sequels and progressive jackpot variations
There are thousands of slots available and no two are exactly alike. Get familiar with the game's mechanics, payouts and bonus features to figure out what works best for you. Don't be afraid to walk away if the game doesn't fit your tastes.
Consider your bets
Your betting behaviour can have a massive impact on your playing experience. Find the right balance between budgeting to play responsibly and seeking those bigger wins when the time is right. Ensure you always play within your means and only up your bet values when you feel comfortable.
Practice with free games
Playing with free games allows you to test out a variety of games available at top UK slot sites. Playing for free gives you the chance to learn and get comfortable with a game without the risk of losing money.
Take advantage of bonuses and promotions.
Grabbing bonuses and promotions is one of the most lucrative elements available at online slot sites. Take advantage of promotions like no-deposit deals, first-deposit bonuses, or free spins to get the most of your online casino sign-ups.
Understand RTP & Volatility
When selecting a game to play, it is important to understand the maths behind the game. Check out the top slot sites to see what high RTP games they offer to maximise your potential winnings when you spin for real money.
Choose a top UK slot site
Choosing the right UK slot site for you will have a substantial impact on your playing experience from your first day and far into the future too. Using our casino reviews can help you with this and using our recommended casinos are guaranteed to provide an impeccable experience for players.
Other casino games
Blackjack
Play blackjack for fun with more than 35 free blackjack games on this page. Play variants like double exposure and multi hand blackjack instantly.
💰RTP: 99.5%
⭐Popularity: High
📈 Difficulty: Easy
🎲 Popular games: Multihand Blackjack, Blackjack Switch, Spanish 21
The basic concept of slots is to spin the reels and match up the symbols along paylines to win. When you're playing slots online at any of our top online casinos, you can find the instructions on how to play in any game's paytable options.
Can I play slots for free?
Yes. Most online slots sites will offer players the option to play some free slot games. This means you won't have to deposit any money to get started, you can simply enjoy the game for fun. Keep in mind that playing free slots does not allow you to play for real money; meaning any winnings are purely for fun.
What should I look for in an online slot casino?
After security and legitimacy (there are unfortunately a lot of rogue online casinos out there) you want to look at the payout percentage of an online slot. This is the percentage of the wagers paid in that the casino pays out in winnings. This is especially important if you're planning on playing for real money. A higher payout percentage generally means more money back in your pocket.
What’s a progressive jackpot?
This is a jackpot that builds up over time and then pays out a big sum of money to a single player. Most online slots casinos offer progressive jackpot slots so it's worth keeping an eye on the jackpot total and how frequently the game pays out. Progressive jackpots include mechanics like WowPot, Dream Drops and Jackpot King.
Can I win real money playing online slots?
Yes you can. All online casino sites offer a wide selection of real money slots winnings can be withdrawn for real cash prizes. Just make sure you play within your means and understand how factors like RTP can affect the total payout potential.
How do welcome bonuses work?
Welcome bonuses reward players when they make their first real money deposit. The exact terms and requirements vary from casino to casino and some offers that seem too good to be true probably will be. Before you commit your cash, we recommend checking the wagering requirements of the online slots casino you're planning to play at. These will explain how much of your money you're required to deposit upfront, and what you can expect to receive in return.
Are online slots rigged?
No, all regulated online slot machines are completely fair. Slot machines are rigorously tested before being assigned an RTP value to ensure that the results are random on each and every spin. To guarantee fair play, only choose slots from approved online casinos, such as those we list on this page. Playing at any of these will give you a fair chance of winning.
Does the amount I deposit at a slots site influence the payout?
Bigger bets have no affect on the chances of winning but can mean you return more winnings when wins are recorded. Paytable values are calculated based on your bet level meaning that wins at a higher bet level will return more cash. Be mindful to always play within your means and only play at high bet levels if your bankroll allows it.
Do people actually win money with online slots?
Of course. People are winning money on slot machines every single day - with some earning big prizes. Every slot that is properly regulated and on the books of a licensed casino has a chance to award cash prizes on every single spin with some slots having top payouts of over 100,000x depending on the results.
Are there specific UK slot site regulations?
As per UKGC regulations, there are several elements of slots that are banned at UK slot sites. For example, Quick Spin and Auto-Play features, which allow for the game to play with little input from the player, are banned on UK slots. Bonus and feature buys are also prohibited.
Aside from these in-game regulations, players cannot use credit card payments to fund their UK slot site accounts as to avoid players gambling with money they might not have.
William Macmaster is a casino expert who has spent his career connecting players from across the world with unforgettable experiences at safe and reliable online casinos. You can rely on him to provide you with the knowledge you need to get more out of your online gambling experience.
Ian grew up in Malta, Europe's online gaming hub and home of top casino regulators and auditors such as eCOGRA and the Malta Gaming Authority. After completing his Master's degree in Glasgow, he returned to Malta and started writing about casinos. He's worked on hundreds of casinos across the US, New Zealand, Canada, and Ireland, and is a go-to authority for Casino.org's team.
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