Best Online Slots UK 2024 - UK Slots Sites

Online Slot Casinos

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#AD New customers only, min deposit £10, wagering 40x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Full T&C’s apply. +18, Please Gamble responsible. BeGambleAware.org

2

#AD New customers only, 10 free spins on registration (max withdrawal £100), 100 free spins after first deposit, min deposit £20, wagering 35x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Full T&C’s apply

3

New depositing players only. Min. deposit: £10. Max. bonus: £200 + 25 Bonus Spins on Book of Dead. Offer valid on the first deposit. No wagering is required on Bonus Spins. Wagering Required on Bonus Cash: 40x. The match-up bonus that requires a deposit must be wagered 40x.

4

18+. New Players Only. Spins are given as follows: 50 Spins upon a first deposit of minimum £10. Spins may only be used in specific games. The game allowed: Book of Dead. Wagering Requirement: 35x. Spins expire after 24 hours. Promotion available for 72 hours.

5
18+ new players only. Maximum £50 bonus. Minimum deposit: £20. Deposit Bonus wins are capped at £500. Max bet with active bonus: £2. Wagering requirement 100% match deposit bonus: 30 times sum of deposit + bonus. Winnings from Free Spins are credited as Real Money without wagering requirement. Some games may not be played with an active bonus. Games may contribute differently when wagering a bonus. Deposit Bonus expires after 30 days if wagering requirement has not been met. Free Spins expire after 3 days. One bonus allowed per person, address, device, IP. www.begambleaware.org For full bonus terms and conditions, please read below. Responsible Gaming
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18+, WELCOME BONUS: NEW PLAYERS ONLY, 1ST DEPOSIT, MIN DEPOSIT: £10, MAX £80. WAGERING REQUIREMENTS APPLY 35X.

7

New UK based customers only. You must opt in (on registration form) & deposit £20+ via a debit card to qualify. Offer valid 7 days from registration. Welcome Bonus: 100% match up to £100 on 1st deposit. 50x wagering applies (as do weighting requirements). Free Spins: Awarded on Gold Blitz once you have staked £20 on any Global Game. Spin value = 10p. No wagering requirements on free spin winnings. 

8

New Customers only. Opt-In Required. 100 Spins awarded on God of Fire, valued at 20p per spin. Spins awarded on 1st deposit of £20+. 30x Wagering applies as do weighting requirements. Debit card deposits only. The offer is valid for 7 days from your new account being registered. Irregular gameplay may invalidate your bonus - Full Terms apply

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18+. New players only. Min. deposit £20. Max. bonus 100% on 1st deposit. 66 spins on Big Bass Bonanza on 2nd deposit. 35x wagering applies, within 21 days. Max. wins from spins £100. Spins expire after 24 hours. Full T&Cs apply.
10

18+, New customers only, register, deposit and stake £20 on Big Bass Bonanza within 7 days, and claim 100 Free spins on Big Bass Bonanza. Free spins expire 30 days after credited. Ends 30/06/24 at 23:59 GMT. Full T&Cs Apply. begambleaware.org.

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o qualify for this promotion players must enter FREESPINS at registration. To activate the free spins, you must deposit and stake £10 or more on your first day’s play at QuinnCasino. 50 free spins (£0.10 per spin) will be credited by 4 pm the day after qualifying and must be used in full within 7-days. T&Cs apply | 18+ New UK Customers Only | BeGambleAware.org | Gamble Responsibly

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New bettors; Use code CASINO; Wager bonus 50x to release bonus winnings; Valid 30 days; Stake contribution, games and payment method exclusions apply; T&C apply; 18+

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Welcome bonus for a new players only | Maximum bonus is 100% up to $/€/£ 123 | Min deposit is $/€/£ 10 | No max cash out | Wagering is 50x bonus | Maximum bet while playing with a bonus is $/€/£ 5 | Eligibility is restricted for a suspected abuse | Skrill and Neteller deposits excluded |

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New customers only aged 18+. Minimum deposit £10. Get a Casino Bonus matched to your first deposit, up to £100, after you stake £20 on slots, credited within 48 hours. Bonus expires in 7 days and has a 40x wagering requirement. Additional T&Cs apply. Please bet responsibly.

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New customers & 18+ only. Min. deposit of £10. Qualifying real money bet of £10. Min odds greater than or equal to 1.5 required. E/W bets excluded. Offer credited within 48 hours. Additional T&Cs apply. Please gamble responsibly.

Welcome to the weird and wonderful world of casino slots! Online slot games come in all shapes and sizes with a variety of interesting and exciting gameplay features, making them an appealing gaming option for UK players.

Online Slots Overview 

To guide you through everything you need to know about online slots, we’ll be covering the best slots sites UK, the variety of slots on offer, how to play online slots, and so much more! 

Online slots are undoubtedly one of, if not the most, popular casino games amongst UK punters. While these games started out as an online version of the classic slot machines you see in your local casino, they’ve grown to be so much bigger.

The sheer number of unique games is unrivalled in any other genre of casino game, meaning that slots fans always have something new to play. These games are extremely popular due to the diverse range of themes, designs, and gameplay features they can offer. No two slots are ever exactly the same, meaning there are thousands of games offering a unique gaming experience. 

How We Choose The Top Online Slots 

As there are thousands, if not tens of thousands of online slots available to play, finding the best games to recommend to our readers can be tricky. That’s why we employ a team of veritable casino experts with years of experience in the industry to pick out the very best slot games UK, allowing you to have the best possible online slot experience.

When reviewing slots, our experts work from a pre-approved list of features, ensuring that we find the best online slots UK for you to enjoy.

  • Themes and Graphics - We look for games that have cutting-edge graphics and well-designed themes, giving you a top-class visual experience.
  • Payout Rate (RTP) - Slots that have higher RTP rates payout more often, making them more appealing to the average player. That’s why our experts look for the best payout slots with high RTP rates, giving you a better chance of receiving a payout.
  • Volatility - As well as RTP rates, we also check the volatility of a slot to see how often it pays out; high volatility slots pay out larger amounts less frequently, whereas low volatility slots pay out lower amounts more frequently.
  • Features - Games that offer a diverse range of features, such as Wild symbols, free spins, and bonus rounds, are much more likely to make our list of recommendations.
  • Bet Limits - We know that the bankrolls of our readers come in all shapes and sizes; to help everyone enjoy our recommendations, we look for slots with low minimum and high maximum bet limits.
  • Bonuses and Promotions - When claiming an online casino bonus, you want to know that you’re going to be able to use it on the best games. Our experts check the T&Cs of casino bonus offers to determine which slots can be played with your bonus funds.
  • Jackpots - Everyone dreams of winning a huge jackpot and riding off into the sunset, which is why our experts look for the slots offering the biggest jackpots around!
  • Mobile Compatibility - With mobile gaming becoming increasingly popular, it’s important that an online slot can be played on both Android and iOS devices. Our team tests each slot on multiple mobile devices to ensure full compatibility.
  • Demo Versions (Free Play) - Not everyone wants to play online slots for real money, so it’s important that a game offers a demo version that allows players to enjoy the game without risking any of their hard-earned cash.
  • Software Provider - When evaluating an online slot, naturally we take a look at the software provider behind it. Games that come from recognised software developers with a reputation for creating quality games are more likely to be good enough quality to make our list of recommendations.

Slots To Avoid

Due to the large number of slot games available at real money casinos, it’s only natural that there are a few duds out there that you should avoid. If you want to avoid these games and only play the very best games, avoid slots with a combination of these features.

  • Low RTP - Slot games with a low RTP rate without accompanying features like large jackpots should be avoided as they do not pay out as frequently as other slots. Games with an RTP rate below 85% fall into this category.
  • Low Maximum Win - Games that have a low maximum win offer little incentive for you to play them. There are hundreds of games with huge potential winnings on offer, so don’t waste your time on low-win games.
  • Basic Design - Online slots have developed rapidly in the last twenty years, so there is no excuse for a game to have poor graphics or a basic design.
  • Not From Licensed Developer - If the game is made by a developer without a gaming licence, there is a risk that the game can be manipulated, causing increased losses. 

Tips For Choosing The Best Online Slots UK

Picking the best UK slots may seem like a difficult task, but our team of experts are here to provide helpful tips that you can choose while looking for your next online slot game.

  • Play At Licensed Casinos - One of the best ways to ensure that you only play the top UK slots is to play at licensed casinos. These casinos only offer fair and trustworthy games from legitimate developers, giving you peace of mind while playing.
  • Examine Features - Before you play an online slot, take a look at the features that it has to offer. Examine the volatility, RTP rate, and bonus rounds to see if it’s a slot worth playing.
  • Play For Free - If the game has a demo mode, try it out for free before playing for real money. By trying the game first, you get to see whether or not it fits your tastes before spending your hard-earned money.
  • Read Reviews - Another great way to determine the quality of a slot is to read slots reviews by casino experts and other casino players. The more positive reviews there are, the better the slot is likely to be. 

Analyzing the Pros and Cons of Online Slot Games

Playing online slots brings thrills and spills like no other casino game. These games come in all shapes and sizes, but like with any game, there are pros and cons. Here are the perks and drawbacks of playing online slots UK.

Pros
Cons
  • You can play online slot games for free, which is not possible at land-based casinos. The free play offers the same experience, but you are betting with free credits.
  • You can claim bonus offers and enjoy more funds to bet on slot games.
  • Online casinos have a much more diverse range of slot games, so you’ll be spoilt for choice.
  • The slots online are built in mobile-friendly technology so you can take all the action on the move.
  • At online casinos, getting your winnings is not instant, unlike playing at a real brick-and-mortar casino.
  • Playing slots online doesn’t offer any social interaction.
  • Getting money in and out of your online casino account to play slots can mean additional charges.

How to Play Online Slots

One of the great things about online slots is that they’re often really easy to play. You don’t need to learn any complex strategies or memorise the value of different cards, you can simply load the game and start playing. This low barrier to entry is another reason why online slots are so popular in the UK; they can be enjoyed by all casino gamblers, no matter your experience.

If you’re new to the world of online slots games and want to know where to begin, you’re in the right place! We’ve created a step-by-step guide that will walk you through playing online slots for the first time.

  1. Choose a casino - Pick an online casino that offers online slot games that you would like to play. You can find a list of recommendations right here on this page!
  2. Check out the site - Once you’ve picked a casino, take a look at the website, evaluate its features, and see if it’s somewhere you’d like to play.
  3. Create an account - Click the Sign Up or Register button and fill out the forms provided to create your account.
  4. Make a real money deposit - Go to the deposit page and make a real money deposit using one of the approved payment options.
  5. Choose a slot game - Pick a game that you’d like to play from the list of available options.
  6. Set your bet amount - Select how much you’d like to bet each spin. Some games also let you choose how many betting lines you’d like to use.
  7. Click the Spin button - Once you’ve selected how much you’re betting each spin, simply click the Spin button to start playing! 

Online Slots Tips & Strategies

Online slots are a game of luck rather than a game of skill, meaning that there are no strategies that you can use to win in the long run. However, our experts have provided some helpful tips that will help you maximise your online slot experience.

  • Read the rules - It’s important to read and understand the rules of each slot game before you play. Some offer special features and bonus rounds when you meet certain criteria; understanding the rules of these features will help you maximise your returns.
  • Use bankroll management - When playing online slots, you should consider how much money you have in your bankroll. By making bets that are appropriate for your bankroll size, you are able to extend your gameplay session.
  • Play high RTP slots - Slots with a higher return to player (RTP) rate will pay out more frequently than slots with a lower RTP rate. Look for slots with RTP rates of 96% or higher to increase your chances of a payout.

Varieties of Online Slot Machines and Game Types

One of the reasons online slots are so popular is due to the incredible variety on offer at even the most basic online casino sites. Almost all sites in the UK will offer hundreds of online slots, each with its own design, themes, animations, features, and gameplay, giving you unparalleled choice.

To give you an idea of just how broad the variety is, we’ve highlighted the most popular varieties of online slot games that you can find at the average online casino.

  • Classic Slots: Classic slots are what the average person thinks of when they think of online slot machines. Often called three-reel slots, this type of online slot is inspired by the original mechanical slot machines. These games have three reels with basic symbols such as bars, fruit, bells, and sevens. You’ll find that these games offer a lower number of paylines than modern slots and don’t have as many bonus features, leading to a more simplified gaming experience.
  • Video Slots: Video slots are one of the most popular modern variations of online slots. These games put significant emphasis on their design and themes, creating an enhanced visual experience for the player. Video slots offer a diverse range of themes, with some slots recreating your favourite movies and TV shows, with others drawing inspiration from ancient civilisations. You can expect these games to offer state-of-the-art animation and complex symbol designs, as well as improved sound effects that match the tone of the slot. These games typically have five reels, creating the opportunity for hundreds of potential paylines. You will also find that video slots offer more features, such as Wild symbols, Scatter symbols, and bonus rounds.
  • Progressive Slots: If you’re a fan of huge prizes, then progressive jackpot slots are the game for you. These online slots offer jackpots that increase incrementally, with a small part of each player’s wager contributing to the prize pool. Typically, there are four jackpots a player can win; Mini, Minor, Major, and Grand. The Mini Jackpot is the smallest, whereas the Grand Jackpot is the biggest jackpot a player can win in that game. Some progressive slots have jackpots that rise into the millions of pounds, giving you a huge incentive to play. These games typically use a 5x3 reel structure and offer features such as bonus rounds, Wild symbols, and free spins.
  • 3D Slots: 3D slot games are built around their ability to offer enhanced graphics. They use 3D graphics, animations, and symbols to create an immersive playing experience that can’t be matched by basic 2D slots. The reel structure, themes, and gameplay features will vary from game to game, but the key feature that remains the same is the cutting-edge 3D graphics.
  • Fruit Machines: Fruit machines are a sub-category of the classic slot games and are one of the most popular slots of that variety. These games are reminiscent of the old one-armed bandits that you would see in the olden days, using a 3x3 reel structure and a limited number of paylines. The symbols of these games are almost entirely themed around fruit, including grapes, lemons, oranges, and cherries. Fruit machine slots have a basic design and limited gameplay features, relying on nostalgia to attract an audience.
  • Megaways Slots: Megaways slots offer a unique payout structure with a variable number of symbols on each reel. The number of paylines available will vary depending on where the reels land. The most paylines you can see at any one time is a staggering 117,649, giving you plenty of opportunities to find a winning match.
  • Mobile Slots: While many online slots can be played on mobile devices, mobile slots are specifically optimised for mobile gaming. These slots offer increased performance, better graphics, intuitive controls, and touchscreen functionality, allowing you to game on the go without hindrance.
  • Multi-Payline Slots: Multi-payline slots have multiple paylines that allow you to win multiple times in one spin. While these games may offer increased chances of winning, they come with an increased risk, as you must make larger bets to cover all of the available paylines. Many of the best multi-payline games will allow you to choose how many bet lines you’d like to play, giving you full control over the amount you bet.
  • Interactive Slots: Interactive slots offer a more engaging gameplay experience thanks to the mini-games and bonus rounds they offer. These mini-games require player participation, either through skill-based games or decision-based games, giving players influence over their results.
  • VR Slots: VR slots or virtual reality slots are a modern variation of the traditional online slot that utilises virtual reality technology to offer players a truly immersive playing experience. When playing these games with a VR headset, you are transported to an entirely different world, giving you an unmatched gaming experience. 

Online Slot Features 

Online slots offer a variety of features that enhance the gaming experience. While there are dozens of unique features available, we’ve highlighted the most popular features found in the best UK slot games.

  • Wild Symbols - These are symbols that can replace almost any other symbol on the board, making it easier to find a winning combination.
  • Expanding Symbols - These symbols will expand across entire reels or even multiple reels, giving you a higher chance of finding a winning combination.
  • Free Spins - Some slots offer free spins with real money winnings if you find a specific number of Scatter symbols on the game board.
  • Bonus Rounds - Other slots offer bonus rounds where players can win instant cash prizes.
  • Bet Limits - Each slot has a minimum and maximum bet limit in place, allowing you to determine how much you want to risk each spin.
  • Auto Spin - To save you from having to click the Spin button dozens of times in a row, some slots offer auto-spin that allows you to repeat the same spin for a set number of times.
  • Bonus Buy - Tired of spinning for hours and not finding bonuses? Some online slots allow players to buy their way into a bonus round, giving them instant access to potentially huge rewards.
  • Double or Nothing - Some slot games allow players the opportunity to gamble their winnings at the end of each spin in a fun double-or-nothing game. 

What You Should Know Before Playing Casino Slots

Once you are ready to give the slots a spin, you should consider the points below. These tips will help you get the most out of your online slot experience.

  • Always pick a trustworthy and reputable online casino operator. The casino should be fully licensed and regulated by the UKGC. The certifications can be found in the footer of the casino site. 
  • Take some time to explore the various bonus offers, such as no deposit bonuses, free spins, reload bonuses, cashback, and more. Make sure you read the terms and understand the bonus value first. 
  • Check out the different banking options to make sure that the casino has payment services you are familiar with. The best casinos will accept a choice of bank cards, eWallets, prepaid vouchers, and more. 
  • UK casinos require players to verify their accounts by providing government-issued ID. There is usually a withdrawal restriction on unverified accounts. Check the verification process and make sure you understand the requirements.
  • You will be required to pass over sensitive information, such as your address, date of birth and more. Check that the casino is SSL-secured and has a water-tight privacy policy. 
  • Many online slot games have adjustable RTP ranges. You should double-check the RTP before you start spinning the reels. 
  • Not all slot games contribute towards the wagering requirements. If you are playing with bonus money, always make sure you are aware of the restricted slot games.
  • Many casinos run slot tournaments. The tournament games often give you an extra chance of winning prizes. These are great games to play, as you can enjoy regular and tournament wins. The available slot tournaments will be displayed in the promotions section. 
  • Consider turning your marketing notifications on. Many casinos will notify you of bonus offers, tournaments and other rewards, so you don't miss out!
  • Now that you have all the information, you can confidently enjoy playing the best slots casinos.

10 Key Considerations and Quick Slots UK Strategy Tips Before You Play

As online slot machines are all about luck, there is no tried and tested strategy to implement. However, there are a few things you can do to get the most out of your gambling experience.

  1. Check the Pay Table: All online slot games have a pay table available to view. This is unique to every game and displays what each symbol is worth and what you need to create wins.
  2. Look for high RTPs: The RTP (return to player) percentage varies, and anything over the industry average of 96.5% will give you a better chance of cashing out a profit.
  3. Find the best bonus rounds: Some slot games are jam-packed with rewarding bonus features. Once you have triggered a bonus round, you are almost sure to hit decent wins. Try and find games with lucrative bonus rounds.
  4. Check out the classics: The traditional slot games often have a higher payout percentage. There is a reason why these games are still super popular amongst slot enthusiasts!
  5. Hit up smaller jackpots: Playing games with regular jackpots over progressive jackpots will offer a better chance to land bigger wins.
  6. The variance: Playing high volatility slots gives you a bigger chance of hitting a big win, while low volatility offers more regular smaller prizes.
  7. Budget control: You should set a budget and stick to it. You should also consider increasing the bet limit if your budget allows. The bigger the bet, the bigger the win.
  8. Do your research: There are plenty of sites that offer in-depth information on online slot games. Some slot games have legions of fans because of the win potential and gameplay.
  9. Avoid the gamble feature: Many slot games have a gamble game where you can risk your winnings for a double-or-nothing bet. It’s always best to avoid this feature.
  10. Play smart: You should only gamble and play slots when you’re in the right frame of mind. You should avoid playing when on alcohol or feeling stressed.

Slots Online Security and Trust

Safety and securityCasino.com UK is dedicated to providing the best sites, and ensure each site we recommend is fully regulated in both the UK. We also make sure that all the games are 100% fair. All of our recommended sites work with leading casino game developers like Playtech, NetEnt, Pragmatic Play, Realistic, Blueprint, Microgaming, Play N’ Go, Red Tiger, Quickspin, and more. These developers all use a sophisticated Random Number Generator to ensure that the odds of winning are fair.

Casino.com UK takes player privacy very seriously and we endeavour to only recommend the very safest sites. We look for sites that accept payment methods from a variety of leading payment providers, with all transactions being heavily encrypted to guarantee that your funds arrive safely and your data isn’t compromised along the way.

Top Casino Slots Online UK 

With so many online slots on the market, each offering unique features and themes, it can be hard to know where to begin. Rather than letting you wade through dozens of mediocre slots before finding the diamonds in the rough, our experts have listed their top three UK slots for you to enjoy. So, if you’re looking to play a new online slot game, check out the titles below.

Starburst Slot Game

Created by leading software developer NetEnt, Starburst slot is one of the most popular slot machines in the UK. This game has a 96.06% RTP rate with low volatility, meaning that it frequently pays out. There are only 10 paylines available and a maximum win of 500x. The game can even be played on mobile devices, allowing you to have fun while on the move.

The game offers a variety of features, including Expanding Symbols, Bothways Payouts, Sticky Wilds, ReSpins, and many more! We love the variety of features on offer and the high RTP rate, but we’d like to see a higher maximum win on offer. 

Our Slot Casino Choice:

Betzone Casino
20% Cashback on First 7-Day Losses on Selected Games.

New customers or invitation only. Must join with promo code: BETZONESLOTS. Cashback available only for losses on select games. This promotion is available to qualifying customers from 00:00 on 15/10/2023 – 23:59 on 31/12/2024. UK residents using debit card. Wagers are capped by individual game limit at either £5, £10 to £20 – see full terms for details per game. Max cashback £50. Restrictions + T&Cs apply. Please gamble responsibly.

Book of Dead Slot Game

Developed by Play’n Go in 2016, Book of Dead is loosely based on the Book of Ra slot machine; arguably one of the top physical slot machines ever created. The game has a 94.25% RTP rate and a high volatility level but makes up for it with a 5,000x max win. The bet ranges start from as little as £0.01 and rise up to £100, allowing players of all bankroll sizes to enjoy this game.

The game uses a traditional 5x3 reel layout with a total of 10 paylines. Book of Dead is available to play on both PC and mobile devices, allowing you to enjoy the game from anywhere. Players can enjoy a variety of features, including Free Spins, Expanding Symbols, and Wild Symbols.

The design of the game is fantastic and we love the 5,000x maximum win, but we’d like to see more paylines and a slightly higher RTP rate. 

Our Slot Casino Choice:

Pub Casino
100% UP TO £100 WELCOME BONUS

#AD New customers only, min deposit £10, wagering 40x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Full T&C’s apply. +18, Please Gamble responsible. BeGambleAware.org

Mega Moolah Slot Game

Known as the slot with the biggest jackpots in the world, Mega Moolah slot game is a firm favourite amongst online slot players. Developed by Games Global in 2006, Mega Moolah is responsible for paying out world record jackpots, with the biggest score being €19,430,723.60 in 2021! The game uses a progressive jackpot system, with a small part of each bet contributing to the prize pool.

Mega Moolah has an 88.12% RTP rate and medium variance. The minimum bet is £0.25 and the maximum bet is £6.25. Mega Moolah has an interesting safari theme and uses a 5x3 reel structure. Some of the features it offers include Free Spins, Multipliers, and Wild Symbols.

We absolutely love the huge potential payouts of this game, and while we’d like to see a higher RTP rate, we still think this game is well worth checking out. 

Our Slot Casino Choice:

Fitzdares Casino
Join&get up to £100 casino bonus

New customers only aged 18+. Minimum deposit £10. Get a Casino Bonus matched to your first deposit, up to £100, after you stake £20 on slots, credited within 48 hours. Bonus expires in 7 days and has a 40x wagering requirement. Additional T&Cs apply. Please bet responsibly.

Online Slots UK Bonuses and Promotions

Bonus and promotions When playing slots for real money at UK online casinos, you get to take advantage of the various bonuses and promotions on offer! These casino bonuses can offer great value for money and allow your deposit to last longer.

Let’s take a look at some of the casino bonus offers you can use to enjoy your favourite online slots.

  • Welcome Bonus - Almost all UK casinos offer a welcome bonus to attract new players. The most common form of the welcome bonus is a matched deposit bonus that matches a percentage of your deposit with bonus funds. For example, if you claimed a 50% matched deposit bonus with a £100 deposit, you’d receive an extra £50 in bonus funds that you could use to play online slots.
  • No Deposit Bonus - A no deposit bonus is an online casino bonus that provides rewards such as bonus funds and free spins without having to make a deposit. Typically, a no deposit bonus requires you to create and verify a new casino account, upon which your rewards will be automatically added to your account.
  • Free Spins Bonus - A free spins bonus is a slot-specific bonus that offers free spins on specific slot games when you make a deposit. Once you have made a qualifying deposit, your free spins will be added to your account, giving you the chance to play some of the most popular online slots for free.
  • Slot Tournaments - Another slot-specific promotion that a casino may run is a slot tournament. These tournaments encourage players to play specific slots games UK, earning points as they do so. The players who earn the most points at the end of the tournament can be rewarded with cash prizes or bonus funds.
  • Referral Bonus - Some casinos may offer referral bonuses that reward you for signing up a new player to the casino. Once the new player has created an account, made a deposit, and played some casino games, you will be rewarded with bonus funds or free spins.

Wagering Requirements

While using your casino bonus, it’s important to be aware of the wagering requirements in place. Wagering requirements (or playthrough requirements as they’re sometimes known) dictate how much you need to use your casino bonus before any winnings are eligible for withdrawal.

For example, if I receive £10 in bonus funds with 30x wagering requirements, I would need to play £300 worth of casino games before I can make a withdrawal. If you try to make a withdrawal before clearing the wagering requirements, your bonus funds won’t be available for withdrawal, and you may risk losing your bonus.

The wagering requirements of a casino bonus are typically 20x-40x, although some special offers have wagering requirements as low as 1x, whereas other casinos have requirements of 50x or greater. 

Real Money Slots vs. Free Online Slots 

When playing online slots you can choose to either play for real money or play for free. Both of these methods have their pros and cons, but before we do a full comparison, let’s take a closer look at what it means to play slots for free and real money.

Real Money Slots

When playing online slots for real money, you’re risking your hard-earned money to potentially win some of the casino’s money. You need to understand that these games have a built-in house edge, meaning that the casino will always win in the long run. However, many players prefer playing slots for real money, as it offers an increased emotional investment, as well as the chance to walk away a winner in the short term.

Free Slots

When playing free online slots, you are not risking any real money while you play. However, this also means that any winnings you earn aren’t real and cannot be withdrawn. Many players use free slot games as a way to familiarise themselves with a new game or to test out a new betting strategy.

If you’re new to online slots, we recommend that you play free slots before playing for real money.

Comparison: Free Slots vs. Real Money Slots

Now that we know a little more about playing online slots for free and for real money, let’s take a look at a comparison of the two. 

Real Money Slots
Free Online Slots
  • Potential to win real money
  • Risk of losing real money
  • Access to casino bonuses and promotions
  • No opportunity to practice or test a game without the risk of losing money
  • No potential to win real money
  • No risk of losing real money
  • No access to online bonuses and promotions
  • Players can test new strategies and try new games with zero risk

Jackpot Slots

Jackpots are special prizes that can be won when playing specific online slots. Not all slots offer jackpot prizes, which is why there is a specific sub-category of slots called Jackpot Slots. There are several different varieties of jackpot slots available to play, but we’re going to cover the three most popular types.

  • Fixed Jackpots - These games offer a specific jackpot amount that never changes. To trigger the jackpot, you typically need to match a specific combination of symbols on your game board. For example, if you match five jackpot symbols across one of the available paylines, you will win the jackpot. Fixed jackpots are the same for all players, regardless of the bet size.
  • Daily Jackpots - Some slot games offer daily jackpots that must be won within a 24-hour time frame. These jackpots are progressive, which means that the total increases as more players play the slot, but also have a guaranteed minimum amount that you can win each day.
  • Progressive Jackpots - Progressive jackpots are jackpots that grow over time and are typically much larger than fixed jackpots. A small percentage of each bet is added to the prize pool, increasing the amount you can win over time. These games typically offer multiple jackpot prizes, with the highest jackpot available to players who bet the maximum.

Best Jackpot Slots

If you want to try and win one of these huge jackpot prizes, you’ll want to play one of the top UK jackpot slots. Our experts have listed their top three jackpot slot games in the table below, so give them a try and see if you’re one of the lucky winners! 

Slot Name RTP Progressive? Features 
Mega Moolah 88.12% Yes Free Spins 
Multipliers 
Wild Symbols 
Dead or Alive 95.03% NoFree Spins 
Sticky Wilds 
Jackpot Giant 91.25% Yes Wild Symbols 
Bonus Game 
Free Spins 

UK Slots Mobile Experience

Mobile CasinoDue to the popularity of mobile casino gaming, we’ve seen a marked increase in the number of online casinos offering online slots on a mobile gaming platform. However, not all mobile casinos are created equal, and there are some sites that offer a much better mobile gaming experience than others. 
 
If you’re considering playing online slots at a mobile casino, here are a few things to consider.

  • Game Selection - Not all casinos offer the same selection of games on their mobile gaming platform as they do on their PC gaming platform, so take a look at the differences and check that they still offer the games you want to play.
  • Website Layout - It’s easy to make optimisation mistakes when creating a website for a smaller screen, leading to text overlap, distorted images, and other issues that make a site difficult to navigate. Before committing to a mobile casino, see how the site runs on your device.
  • Performance Optimisation - As they offer lower processing power, getting good performance when playing an online slot on a mobile app can be difficult. Many slot providers intentionally optimise their games for mobile devices, so check to see whether or not your favourite games are suitable for mobile play.
  • App Availability - Many of the top online casinos offer dedicated mobile gaming apps that allow you to enjoy hundreds of slot games. Apps are often better optimised for both layout and performance, making them a desirable option for mobile slot players. 

Online Slot Payout & RTP 

A slot’s payout and RTP rate are two important things to consider when choosing which online slot to play. While many people use the terms interchangeably, the two terms have different meanings:

Payout - A slot’s payout refers to the amount of money a player can expect to receive when they win. Many slots have varying payouts depending on the symbols matched, leading to a minimum and maximum payout.

RTP (Return To Player) - A slot’s RTP rate is a percentage that represents the amount of money that will be paid back to the player in the long run. While the payout of a slot will vary from spin to spin, the RTP rate looks at what happens across hundreds, if not thousands of spins. For example, if a slot has a 96% RTP rate, it means that in the long run, each player will receive back £96 for every £100 they wager.

High RTP Slots

To save you the effort of looking at the RTP rate of every single slot, our experts have collected ten of the most popular high RTP slots available at UK casinos. So, if you want to try out a high RTP slot, take a look at our options below. 

Online Slot RTP Rate Software Provider 
Starburst 96.09% NetEnt 
Reel Rush 96.96% NetEnt 
Jack Hammer 96.96% NetEnt 
Joker Strike 96.46% Quickspin 
Guns N’Roses 94.07% NetEnt 
Butterfly Staxx 94.05% NetEnt 
Fruit Shop 94.05% NetEnt 
Mega Joker 95.05% Novomatic 

Online Slot Machine Volatility 

When talking about the RTP rate of a slot, it’s also important to talk about a slot’s volatility. While the two concepts are different, they do interact with each other to influence the game. A slot’s volatility level can be split into five categories:

  • Low
  • Low/Med
  • Medium
  • Med/High
  • High

If a slot has a low volatility level, it will pay out more frequently but for lower amounts. In contrast, a slot with a high volatility level will pay out less frequently but will pay out higher amounts. Volatility and RTP rates are often linked; slots with a lower RTP rate will often have higher volatility, whereas high RTP slots will often have lower volatility.

When deciding whether high-volatility or low-volatility slots are right for you, it’s important to determine your overall risk level. If you aren’t risk-tolerant, then you should play low-volatility slots, whereas players with a high risk tolerance may prefer high-volatility slots. 

Slots Online Software Providers 

When evaluating online slots, it’s important to look at the software provider who has made the game. Certain companies have created reputations for creating top-quality casino games, so if you see a new game from this developer, you can try it with the confidence that it’s likely to be of a similar quality.

To give you an idea of the companies to look out for, we’ve listed five of the biggest online slot developers in the industry.

  • NetEnt - Having launched back in 1996, NetEnt has been creating top-quality online slots for more than 25 years. They’ve become renowned as one of the best slot developers in the world, creating a variety of popular titles such as Starburst and Gonzo’s Quest.
  • Play’n Go - Play’n Go is another slot developer that’s been around for years, having launched in 2005. They started out with the ambition to be the best gaming entertainment supplier around, and you could certainly argue that they’ve achieved that goal! With dozens of well-known slot IPs such as Book of Dead and Rise of Merlin, they can be relied on to create high-quality online slots.
  • Pragmatic Play - A relatively new face in the casino development world, Pragmatic Play was founded in 2015 but has quickly grown to be one of the most recognisable game developers. With popular titles such as Wolf Gold, Sweet Bonanza, and Great Rhino under its belt, Pragmatic has found success with simple, well-designed slots that offer interesting features.
  • Quickspin - A Swedish game developer that started in 2011, Quickspin is known for its range of innovative slot games that combine engaging gameplay with immersive storylines. Games such as Big Bad Wolf, Sticky Bandits, and Sakura Fortune are commonly found at the best UK slot casinos and are a favourite amongst UK punters.
  • Thunderkick - Thunderkick launched in 2012 out of a tiny studio in Stockholm with a dream of creating fun, exciting casino games. Thunderkick games are easily recognisable due to their distinctive designs and quality animations. Popular Thunderkick titles include Pink Elephants, Birds on a Wire, and Esqueleto Explosivo. 

How To Choose Online Slots Casinos 

Now that you know everything there is to know about the world of online slots, it’s time to start playing! With so many different online casinos offering slot games in the UK, finding the best slots sites can be a time-consuming process - even more so if you’re just getting started.

To help you cut through the noise and find the best online slots casinos, our experts have created a list of key features that you should evaluate when checking out a casino for the first time.

  • Slot Library - One of the most important things to consider when choosing an online slot casino is the variety of slot games they have available. Make sure you check out their slot library and examine the quantity, quality, and variety of games on offer.
  • Payout Rates - When evaluating the casino’s online slots games, you should pay close attention to the payout rates. The higher the RTP rates, the more likely it is that you will receive a payout when you play.
  • Licensing & Security - All of our recommended casinos are fully licensed and regulated, but you should always check the licensing status of any casino before signing up. We also recommend that you check out the security features in place to ensure your funds and data will remain secure while you play.
  • Bonuses & Promotions - Bonus offers and casino promotions can add significant value to your deposit, so we encourage you to shop around and find the best deals before signing up.
  • Mobile Gaming - If you want to enjoy your favourite slot games on the go, you should check out the mobile gaming options available at your casino. Some sites offer dedicated apps whereas others offer mobile-optimised websites, so familiarise yourself with the platforms before making your decision.
  • Banking Options - Being able to quickly, securely, and efficiently move your money on and off an online UK slots casino is extremely important. We recommend looking at the available payment options, as well as the fee structure and withdrawal times to get an idea of how easy it will be to manage your bankroll. 

Slot Themes 

Another reason why online slots are so popular is the variety of different themes and designs they can offer. While most table games use the same generic background, online slots can be themed on a diverse range of topics, from nature to sports to popular video games. To learn more about the different themes offered by online slots, make sure to check out our slot themes page, but to give you an idea of how varied slot themes can be, we’ve created a list highlighting the most popular themes.

  • Jungle Slots
  • Horror Slots
  • Jewel Slots
  • Candy Slots
  • Film Slots
  • TV Slots
  • Animal Slots
  • Magic Slots
  • Music Slots
  • Sport Slots 

Responsible Gambling 

We at Casino.com always encourage our readers to gamble responsibly and to never bet more than they can afford to lose. Remember, online gambling should be a fun pastime and not a way to make money.

If you want to learn more about responsible gambling, many online casinos offer dedicated responsible gambling pages with links to resources such as GamCare and Gambler’s Anonymous. Here you can also find information on responsible gambling tools, such as time outs, deposit limits, and self-exclusion, that can help you keep in control while gambling.

To ensure you gamble responsibly, follow our helpful tips below.

  • Set a bankroll and stick to it
  • Use deposit limits
  • Never play when tired, emotional, or upset
  • Never chase your losses
  • Never gamble more than you can afford to lose 

Online Slots Payment Methods 

When playing online slots for real money, you need to make a real money casino deposit. Many of the top UK slot sites offer a variety of payment methods that you can use to fund your account and withdraw your winnings. Let’s take a look at the most popular options below.

  • Visa - One of the world’s leading debit card providers, Visa offers secure, convenient, and easy deposits and withdrawals.
  • Mastercard - Mastercard is world-renowned as one of the top debit card providers and offers UK players fast, secure, and convenient casino transactions.
  • PayPal - PayPal is an online e-wallet that allows you to make instant deposits to your casino account. It also offers extremely fast withdrawals, making it a preferred option amongst UK players.
  • Paysafecard - Paysafecard is a prepaid card company that allows you to make online casino deposits without a bank account. Simply purchase the card with cash and use the unique 16-digit code to make your casino deposit.
  • Bank Transfer - Bank transfers are an extremely secure way to make an online casino transaction. Thanks to instant banking apps such as Trustly, players using bank transfers now get the benefit of fast withdrawals.
  • Skrill - Skrill is another online e-wallet that is accepted at the majority of UK casinos. They offer fast and secure deposits and withdrawals to and from your casino account.

Online Slots UK Glossary

Here are some key terms for punters to know before playing casino slots online.

  • Bonus Feature and Spins: One of the more exciting aspects of online slot games UK are extra features that can either be triggered at random, or by landing several bonus or scatter symbols. The features can range from free spins, pick-and-click games, a new set of reels with different symbols and much more.
  • Fixed Jackpot: Unlike a progressive jackpot that grows with each spin, a fixed jackpot is usually based on a paytable and has a set payout.
  • Multiplier: This will increase the size of a win by the multiplier. For example, £2 win with a 3x multiplier will payout £6
  • Maximum and Minimum Bet: All online slot games have a minimum and maximum bet that you can wager per spin.
  • Return to Player (RTP): Based on thousands of games, the RTP is the average expected return to the punter. The average RTP is around 96.5%, which means that if you played with $100, you could expect to finish playing with $96.50. It’s important to note that the RTP doesn’t guarantee that you’ll end up with 96.5% of your, where’s the fun in that, but if you took a look at all the punters playing this game, that would be the average return.
  • Grid vs. Payline: These are the two main types of slot games. A game with a set number of paylines will require that symbols are aligned on that payline to create a win. In a grid, or Ways to Win system, the matching symbols just have to land on adjacent rows to create a win.
  • Payout: This is the value of a symbol, the more symbols you have in a row, the higher the payout.
  • Reels: This is taken from the one-armed bandit slot machines that had 3 reels with the symbols on them. Online slot games don’t technically use reels in the mechanisation but kept the terminology.
  • Scatter: A symbol that pays out without having to be along a payline or on adjacent reels. Scatter symbols can often only appear on certain reels and can trigger a bonus feature.
  • Volatility: Also known as variance, this is a way to measure whether a slot game will pay out small wins frequently or has bigger wins but less often. A game with a high volatility is considered a higher risk than low volatility games since they don’t pay out as often.
  • Wild: It can substitute for any regular symbols to create a win. Some slot games have special wild symbols that can expand or multiply, but that depends on the specific game.

UK Slot Games FAQ

Whether you’re playing in a payline or grid style, to win at online slots, you’ll need the symbols to land in a certain formation to trigger a payout. There are some features and jackpots that can be awarded at random, but this will vary per game.

As online slots are purely a game of chance, there are no strategies you can use to win in the long term. However, by fully understanding the rules, using bankroll management, and picking favourable slots, you give yourself the best opportunity to win in the short term. 

Any time you get a matching set of symbols in a winning combination, it will trigger a payout based on the value of the symbol. The paytable will typically be based on the line bet, as opposed to the overall bet. What this means is that if you’re playing a 20 payline game,  make a bet with a  £1 coin, meaning your total bet is  £20 and get 5 symbols in a row with a payout of 100x the payout will be  £100 as opposed to  £2,000.

Unlike progressive slot games that have a constantly changing jackpot, Flat Top machines have a fixed top jackpot.  

No. All the sites we recommend are regulated and licensed in the UK, ensuring fair play. All the slot games use a Random Number Generator (RNG) which is an algorithm making sure the slot game conforms with the preset odds and RTP.

With thousands of slot games offering unique themes, designs, and gameplay features, it’s hard to specify a “best-ever slot.” In reality, the best online slot game is the one you most enjoy playing, so give them a try and see which ones you like the most. 

There are many top online slot casinos available to UK players, each offering a diverse slot portfolio, generous bonuses, and helpful support. The “best” casino comes down to personal preference, so take a look at our recommendations to see which one is your favourite. 

Conclusion 

To sum up, online slots are one of the most popular forms of online casino gaming thanks to the wide variety of designs, themes, gameplay features, and prizes on offer. Each game offers something unique, and the straightforward gameplay makes online casino slots accessible for gamblers of all skill levels. There are many online casinos offering top-quality slot games, so make sure you check out our recommendations for the best places to play!