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Best UK online slot sites & real money slot games 2024

William Macmaster
William Macmaster
Updated 19 Nov 2024
Content Editor

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.

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Big Bass Bonanza
5.0

Best in-game bonus slot for 2024

  • 4000x your bet max-win
  • Wild collection feature
  • Above average RTP (96.71%)
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Play at our top picks for December

#1 TOP RATED CASINO
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MagicRed
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All British
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Payout1-3 days
Win Rate98.13%
Deposit options include
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  • 100% UK Focused
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Dream Vegas
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100% up to £300 + 150 Bonus SpinsBonus
Payout2-3 days
Win Rate96.62%
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Grand Ivy
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Win Rate96.80%
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JackpotCity Casino
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Luna Casino
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Win Rate96.59%
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Fun Casino
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Win Rate96.76%
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Betway Casino
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Win Rate97.16%
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UK online slots casinos to avoid

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.

Expert Rating
1.5/10
Why you should avoid
  • Unprofessional customer support
  • Site operators linked to questionable practices
  • Not paid players their winnings
Expert Rating
1.2/10
Why you should avoid
  • Reports of players not receiving winnings
  • Misleading claims of licensing
  • Unresponsive to customer complaints
Expert Rating
1.5/10
Why you should avoid
  • 18+ months for withdrawal
  • Locked-out accounts
  • Slow response times
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Lewis Crane | Assistant Gaming Specialist

"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 19000+ 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, when ready, play for real money at our top recommended sites.

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:

CategoryOur recommendations
Highest number of slots HeySpin (1,700+ games)
Fastest withdrawal slot casinoBetway (1-2 days)
Highest payout slot casinoDuelz Casino (98.72% average win rate)
Best mobile slots casino (dedicated app)All British Casino (4.3 & 3.1 on iOS and Android app store)
Best Free Spins casino bonusBetway (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.

Casino.org rating: 5/5 | 🏅 Best slot for: Overall gaming experience

🤞 Volatility - Med-High

✖️ Max payout - 2,100x

💸 RTP - 96.71%

🎰 Best casino to play: Betway (125 wager-free spins)

Big Bass Bonanza
Pragmatic Play

💰 Money Train 2 - Relax Gaming

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

Casino.org rating: 4.7/5 | 🏅 Best slot for: Win potential

🤞 Volatility - High

✖️ Max payout - 50,000x

💸 RTP - 98%

🎰 Best casino to play: Jackpot City (100% up to £100)

Money Train 2
Relax Gaming

🤠 Rich Wilde and the Book of Dead - Play'n Go

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

🤞 Volatility - High

✖️ Max payout - 5,000x

💸 RTP - 96.21%

🎰 Best casino to play: HeySpin (100 free spins)

Book of Dead
Play'n GO

🌟 Starburst - NetEnt

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

Casino.org rating: 4.6/5 | 🏅 Best slot for: Cult classics

🤞 Volatility - Low

✖️ Max payout - 500x

💸 RTP - 96.01%

🎰 Best casino to play: Simba Slots (500 free spins)

Starburst
NetEnt

🐕 The Dog House - Pragmatic Play

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

Casino.org rating: 4.7/5 | 🏅 Best slot for: Wild multipliers

🤞 Volatility - High

✖️ Max payout - 6,750x

💸 RTP - 96.51%

🎰 Best casino to play: MyriadPlay (Daily free spins)

The Dog House
Pragmatic Play

🦍 King Kong Cash - Blueprint

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

Casino.org rating: 4.7/5 | 🏅 Best slot for: Wild multipliers

🤞 Volatility - Low-Medium

✖️ Max payout - 50,000x

💸 RTP - 95.79%

🎰 Best casino to play: All British Casino (10% cashback on slot deposit losses)

King Kong Cash
Blueprint Gaming

🪙 Gonzo's Quest - NetEnt

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

🕹️ Player Review: None available at this time.

Casino.org rating: 4.4/5 | 🏅 Best slot for: Cascading reels

🤞 Volatility - Med-High

✖️ Max payout - 3,750x

💸 RTP - 95.79%

🎰 Best casino to play: Pub Casino (100% up to £100)

Gonzo's Quest
NetEnt

🍬 Sweet Bonanza - Pragmatic Play (96.60% RTP)

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)

Sweet Bonanza
Pragmatic Play

🌈 Rainbow Riches - Light & Wonder

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)

Rainbow Riches
Barcrest Games

💫 Gold Blitz Extreme - Fortune Factory Studios

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)

Gold Blitz Extreme
Fortune Factory Studios
William Macmaster
Expert insight: How did we choose these slots?
William Macmaster | Content Editor

"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
Money SleighRelax Gaming
🔥Out Now
Diamond DoggiesRed Tiger
🔥Out Now
Money MayweatherNeon Valley Studios
🔥Out Now
Eternal Empress Freeze TimePragmatic Play
🔥Out Now
Big Bass Xmas ExtremeReelPlay
🔥Out Now
Winter ChampionsRelax GamingNovember 19th 2024
MunchiesNoLimit CityNovember 19th 2024
EmberfallSlotmillNovember 19th 2024
Saint Nicked 2 LucksomeNovember 20th 2024
Split HappensThunderkickNovember 20th 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!

Play the best new UK slots now

How we rate UK slots sites

  • Game selection

    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?

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  • 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.

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  • 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.

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  • 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.

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  • 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.

    colour-approved

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.

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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.

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    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.

      magic red filter games

      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.

        big bass paytable

        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.

          big bass betsize

          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.

            big bass payout

            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.

              big bass bonanza bonus round

              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:

                FeatureHow 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.
                PXL_20240513_144116024.MP.jpg
                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.

                Three-reel Classics Slots

                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:

                RankSlot GameDeveloperRTP
                11429 Uncharted SeasThunderkick98.50%
                2BloodsuckersNetEnt98%
                3Money Train 2Relax98%
                4Blood Suckers MegawaysRed Tiger97.66%
                5Aztec PowernudgePragmatic Play97.57%
                6Sugar Rush 1000Pragmatic Play97.50%
                7Wild SwarmPush Gaming 97.03%
                89k Yeti4ThePlayer97%
                9Fruit WarpThunderkick97%
                10Gorilla Gold MegawaysBlueprint97%

                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.
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                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 spins

                  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

                  Typical wagering: 50x

                  ▶️Available at: Aladdin Slots. Cash Arcade, Slots Animal

                • Wager free spins

                  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.

                  Typical wagering: 0x

                  ▶️Available at: Betway, Magic Red

                • Bonus cash

                  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

                Online slot game software providers

                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.

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                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

                Fishin' Frenzy
                Merkur

                Big Bass Splash - Pragmatic Play

                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

                Big Bass Splash
                Pragmatic Play

                Big Fishing Fortune - Inspired Gaming

                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:

                ✅ 2,500x max win

                ✅ 94.80% RTP & Medium volatility

                ✅ Unlimited free spins bonus game

                Big Fishing Fortune
                Inspired Gaming

                Best Irish slots

                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

                9 Pots Of Gold
                Gameburger Studios

                Luck O' The Irish Go For Gold - Blueprint

                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

                Luck O' The Irish Go For Gold
                Blueprint Gaming

                Rainbow Riches Megaways - Light & Wonder

                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

                Rainbow Riches Megaways
                Barcrest Games

                Best Ancient Egyptian online slots

                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

                Eye Of Horus
                Blueprint Gaming

                Book of Ra Deluxe - Novomatic

                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.

                Book of Ra Deluxe
                Novomatic

                Cleopatra - IGT

                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

                Cleopatra
                IGT

                Top 6 tips for playing online slots UK

                • Choose your slot carefully

                  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.

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                • 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.

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                • 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.

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                • 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.

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                • 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.

                  [New FE Test] Free spins no deposit
                • 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.

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                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
                Video Poker
                Try video poker for free and learn the basics of the game. Choose from over 40 free games from leading providers like NetEnt and Betsoft right here.
                💰RTP: 99%-100%
                Popularity: Medium
                📈 Difficulty: Medium
                🎲 Popular games: Jacks or Better, Joker's Wild, Decuses Wild
                Roulette
                Play roulette for fun and hone your strategy with our free roulette games. Practise popular variants like American and European Roulette now.
                💰RTP: 97.30%
                Popularity: High
                📈 Difficulty: Easy
                🎲 Popular games: French Roulette Double Ball Roulette, Lightning Roulette

                UK slots FAQs

                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.

                References

                • United Kingdom Gambling Commission- The authorities on all gambling-related legislation and laws.
                • eCogra- Focused around casino and gambling regulation and certification.
                • BeGambleAware- For all info on player safety in relation to gambling & gambling addiction.
                • GamCare- Gambling harm support with important info on how to protect vulnerable gamblers and gambling habits.
                • Global Gaming Awards- Independent awards body specialised in online and land-based casino titles.
                • EGR Operator Awards- Awards body highlighting operator's exceptional achievement in player safety and products.

                Slot game reviews

                Still want a little more information before choosing your game? Check out our slot reviews to discover one that’s just right for you.