Best Online Slots UK

Last Updated: 17/09/2020

Online slots are soaring in popularity across the UK by offering fast-paced entertainment, captivating gameplay and the potential to win life-changing prizes. Players now have a dazzling array of online slots at their disposal, from classic 3-reel and 5-reel slots to 3D slots and progressive jackpot games. Hundreds of online casinos are vying for your business, and they all try to entice you with attractive bonuses and exciting new games.

This page will help you identify the best online slots sites in the UK. We will explain the different types of online slots on offer, how to play them and the average returns you can expect to receive. We will also shine a light on the exciting bonus offers you can choose from, and explain the pros and cons of the different payment methods. Ultimately we will steer you towards reputable, trustworthy online slots sites that will treat you fairly, pay you out on time and keep you entertained with a strong array of games. Read on to learn more about the best online slots UK players can enjoy.

We only feature websites and apps that are fully regulated and legal in the UK. Terms and Conditions apply for all bonuses. Must be +18 to participate.


Casino ProviderBonus OfferReview
1

100% Welcome Bonus up to £500 + 50 Bonus Spins

18+. New players only. 1 bonus offer per player. Min. deposit £20. Max. bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire in 30 days, unused bonus funds will be removed. Welcome Offer is 100% match up to £500 + 50 bonus spins on your 1st deposit, 25% match up to £100 + 50 bonus spins on your 2nd deposit, and 50% match up to £500 + 25 bonus spins on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds count towards wagering contribution. Terms apply. BeGambleAware.org

2

100% Welcome Bonus up to £400 + 50 Bonus Spins

18+. New players only. One bonus offer per player. Minimum deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. Bonus funds are 100% match up to £400 on your 1st deposit, 40% match up to £3000 on your 2nd deposit, and 60% match up to £1500 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute towards any wagering requirements. Terms apply. BeGambleAware.org

3

100% Welcome Bonus up to £300 + 100 Zee Spins + 500 Zee Points!

18+. New players only. Valid for 15 days after 1st deposit. Min Deposit £20 Max Bonus Bet £5 Winnings from spins capped at £50 First 100 Zee spins: 10/day. Spins must be used within 24 hours, Funds within 30 days. Bonus funds are separate to Cash funds, and are subject to 35 wagering (bonus + cash). 18+. T&Cs apply. BeGambleAware.org

4

100% Welcome Bonus up to £250 on Classic Slots

100% buy in bonus. Min £20 cash buy in to be eligible. Max bonus £250. Offer only available on classic slot games. Max £2 stake. 20x wager requirements on total of buy in bonus and bonus amount. Bonus valid for 7 days. Keep it fun - set your deposit limit. T&Cs apply.

5

50 Extra Spins

18+ Only | | 50 Extra Spins on Book of Dead | Min. deposit is £10. This offer is only available for first time depositors | Also after your First Deposit you may claim an additional 30 Extra Spins by visiting the Kicker Section | Game: Book of Dead | Spin Value: £0.10 | OJO’s Rewards and Game Play policy applies | T&C's Apply

6

100% Welcome Bonus £100 + 10% Cashback

18+ New Players only. T&C's Apply. Gamble responsibly. www.begambleaware.org

7

100% Welcome Bonus up to £200 + 25 Extra Spins

18+. New players only. Extra Spins (FS) expire in 14 days. FS wins credited in bonus. FS & bonus valid for selected games only. Bonus wins capped at £500. 30x wagering -req. vary by game- in 90 days. UK only - deposit balance available for withdrawal at any time. General withdrawal restrictions & full T&Cs apply.

8

200% Welcome Bonus up to £500

18+. New players only. £20 min deposit, excluding deposits by Skrill or NETELLER. Get 200% up to £500 Bonus Bonus wins are capped at £500. To withdraw bonus & related wins, wager 50 x (bonus amount) within 21 days. Wagering req. vary by game. This offer may not be combined with any other offer. Deposit balance is available for withdrawal at any time. General withdrawal restrictions & full T&Cs apply.

9

£20 Welcome Bonus + 110 Extra Spins

First depositors only. Deposit & Stake £20 on Midnight Wilds slot game: Get 110 Bonus Spins on Midnight Wilds slot at 5p (5 lines x 1p) per spin. Jackpot cannot be won when using extra spins. Customers will also be eligible for existing standard sign up bonuses if they stake an additional £10 on Bingo, see T&Cs for details. £5 min. withdrawal on winnings. T&Cs apply. 18+ BeGambleAware.org. Please play responsibly.

10

50% Welcome Bonus up to a £200

50% deposit offer up to £50 x 4 claims. Total of four (4) cash bonuses available. 35x real money cash wagering of deposit offer amount must be met (30 days from deposit) before bonus amount is credited in cash.

11

Play £10, Get 30 Extra Spins on Rainbow Riches

New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit.18+. Extra Spins: on Rainbow Riches. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. **£10 lifetime deposit for Daily Free Game.

12

Spend £10, Get 30 Extra Spins on Monopoly Paradise Mansion

New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. 18+. Extra Spins: on MONOPOLY Paradise Mansion. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply.

13

Play £10, Get 30 Extra Spins or £50 of Free Bingo

New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. 18+. Extra Spins: on Double Bubble. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply.

14

100% Welcome Bonus up to £100 + 50 Extra Spins

18+ New Players only. Gamble responsibly. www.begambleaware.org

15

Welcome Bonus up to £400

New Customers. Deposits between £20-£100 (max 4) wagered 35x (% game weightings apply) within 30 days on qualifying slot games will unlock cash bonuses of an equal amount.15 days to accept/opt into each bonus. Full T&Cs Apply

16

100% Welcome Bonus up to £100 + 10% Cashback

18+ Only Welcome Bonus for new players only | Max bonus is 100% up to £100 | No Max cash out | Wagering is 35x Bonus | Max bet while playing with a bonus is £5 | Cashback is cash with no restrictions | Bonus excluded for players that deposit with Skrill or Neteller | Full T & C's Apply | Begmbleaware.org

17

Deposit £200, Get 200 Extra Spins

18+. 1st deposit only. Open to GB and Northern IRE. Only 1 of 3 offers can be claimed. Available 14 days from registration. 3 day spins expiry applies. Any winnings credited as cash. Paypal, Moneybookers, Skrill and Neteller payment methods are excluded. Further eligibility and T&Cs apply. begambleaware.org

18

300 Extra Spins

For players registering from 24/02/2020 to 31/12/2020. Registration = 100 Crystals & 500 Vollars. Max Rewards on 1st Dep = 300 Book of Dead cash Spins, 2,500 Vollars & 1,000 Crystals. Only on 1st Dep of min £/€20. Dep needs to be wagered x1. Every €10 on 1st Dep = 10 Cash Spins, x5 Vollars & x2 Crystals. No wagering On Cash Spins wins. Max wins = £/€300. Neteller & Skrill deps. excluded. Listed gameplay excluded on 1st dep. Further T&Cs apply.

19

100% Welcome Bonus up to £800 + 100 Extra Spins

Min. deposit: £20. Offer valid on first deposit. Offer only applies to new players. Bonuses that require a deposit must have the bonus wagered 35 times. Winnings won with extra spins that require a deposit, have to be wagered 35 times your extra spins winnings, unless stated otherwise. Bets on different games contribute differently to the compliance of the wagering requirements: Wagering Bonus Policy Min. deposit: £20. Max. bonus: £850. 18+ T&C's Apply

20

100% Welcome Bonus up to £100 + 25 Extra Spins

18+. New players only. One bonus offer per player. Min deposit £20. Max bonus bet £5. Offer is a 100% deposit match up bonus to £100 plus 25 bonus spins on Aloha! Cluster Pays. Bonus spins winnings are credited in the form of bonus finds and are capped at £50. Bonus finds are separate to Cash funds and are subject to 35x wagering the total of cash + bonus funds. Only bonus funds count towards wagering contribution. Once claimed, funds must be used within 30 days, spins within 10 days, otherwise any unused shall be removed. Terms apply. BeGambleAware.org

21

200% Welcome Bonus up to £500 + 100 Extra Spins

18+ New Players only. T&C's Apply. Gamble responsibly. www.begambleaware.org

22

100% Welcome Bonus up to £50 + 50 Extra Spins

18+ new players only. Maximum £50 bonus. Minimum deposit: £20. Max bet with active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Winnings from Extra Spins are credited as Real Money. Some games may not be played with an active bonus. Games may contribute differently when wagering a bonus. Bonus expires after 30 days if wagering requirement has not been met. One bonus allowed per person, address, device, IP. Bonus Winnings capped at £500. Full T&Cs apply. BeGambleAware.org

23

100% Welcome Bonus up to £100

18+. Minimum deposit: £20. 100% bonus up to £100 valid on first deposit only. Wagering on bonus: 80x. Wagering must be completed within 30 days. Max bonus bet £5. Bonus is valid for a total of 21 days. Game weighting, payment method and standard bonus terms apply.

24

10% Cashback, No Strings Attached

10% Cashback, No Strings Attached! No Bonus Casino offers an unique service of 10% cash back to all our appreciated players. This ensures that you will not be down and out after you played through your last deposit.

25

121% Welcome Bonus up to £300

18+. New players only. Minimum deposit of £10. Bonus funds are 121% up to £300 and separate to Cash funds. 35x bonus wagering requirements. £5 max bet with bonus. Bonus must be used within 30 days otherwise any unused bonus shall be removed. Terms Apply. Gamble responsibly. www.begambleaware.org

26

100% Welcome Bonus up to £500 + 50 Extra Spins

18+. New customers only. Bonus split over first 3 deposits: 1st: 100% bonus up to £500+ 50 Bonus Spins; 2nd: 50% bonus up to £200; 3rd: 125% bonus up to £500. Extra spins are valid on the games : 108 Heroes and the Phantom of the Opera. £20 deposit minimums. Debit cards only. Bonus not awarding if your balance is greater than £1, or you have a pending withdrawal request. 30X wagering on deposit + bonus. Slots only. Some slots not allowed. Max bet £5. Betting on non allowed games or exceeding max allowed bet while playing with deposit funds disqualify you from withdrawing bonus winnings. £5000 max payout. Bonus and bonus winnings may be expired if not played or payout of winnings is not requested within 7 days. Full T&C Apply. Gamble responsibly. Begambleaware.org

27

100% Welcome Bonus up to £200

18+ new customers only. 100% Bonus up to £200 on first deposit only. Min Dep £10, Max bonus £200, 40x wagering, Max 5x conversion. Full T&Cs apply.

28

200% Welcome Bonus up to £100 + 100 Extra Spins

18+. New players only. Up to 10 (20p) extra spins on Super Win 7s for 10 days. Winnings paid as bonus credit. Expire 00:00 every day. Max withdrawal from extra spins bonus winnings £200. Up to 200% deposit match of first deposit (Min £10). Max £100 awarded as bonus credit. 20X wagering on bonus credit. Withdrawing Unspent Qualifying Deposit will exclude the player from these promotions. T&Cs apply. BeGambleAware.org

29

100% Welcome Bonus up to £500 + 30 Extra Spins

18+. New players only. 1 bonus offer per player. Min. deposit £20. Max bonus bet £5. Extra spins on selected games only- must be used within 72 hours. Winnings from Bonus spins credited as bonus funds and capped at £20. Bonus funds expire in 30 days, unused bonus shall be removed. Bonus funds are 100% match up to £500 + 30 extra spins on 1st deposit, 25% match up to £800 + 25 extra spins on 2nd deposit, and 50% match up to £200 + 50 extra spins on 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 40x wagering the total bonus & cash. Only bonus funds count towards wagering contribution. Terms apply. BeGambleAware.org

30

100% Welcome Bonus £1500 + 100 Bonus Spins

18+. One bonus offer per player. Minimum deposit £20. Max bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds must be used within 30 days otherwise any unused bonus shall be removed. Bonus funds are 100% match up to £300 on your 1st deposit, 25% match up to £800 on your 2nd deposit, and 50% match up to £400 on your 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute towards any wagering requirements. Terms apply. BeGambleAware.org

31

100% Welcome Bonus up to £200

18+ | New Customers Only | BeGambleAware.org | Full T&C's Apply

32

100% Welcome Bonus up to £300 + 50 Extra Spins

Max bet limitations per spin apply. 35x wagering requirements apply (i.e the bonus x35). Higher wagering requirements may be applied depending on the games played. 18+.T&C apply, See Below.

33

100% Welcome Bonus up to £99 +99 Extra Spins + 10% Cashback

New customers only. Min deposit £20. Wagering 40x bonus. Max bet £5 with bonus funds. 100% up to £99 bonus + 99 extra spins on 1st deposit. Eligibility is restricted for suspected abuse. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Full T&Cs apply

34

100% Welcome Bonus up to £200 + 100 Extra Spins

Applies to new depositing players. Min deposit £10. Wagering requirements apply 35x. 100 spins require 3 deposits. Full terms apply

35

10 Extra Spins No Deposit + 100% Bonus up to £100 & 20 Extra Spins

Full T&Cs apply. No deposit required & new players only. Claim from “My Offers” within 3 days of registration & 3 day expiry. 10 extra spins worth £0.10 each on Book of Dead, winnings paid as cash. Full T&Cs apply. New players only across two deposits. Cash rewards: 7 days from registration to opt-in from “My Offers” page & each with 7 days wagering. Deposit £10, £25 or £50 & wager 35x. Only cash stakes qualify & wagering contributions vary. 10 extra spins worth £0.10 to be claimed within Book of Dead with each qualifying deposit, 3 day expiry.18+BeGambleAware.org

36

100% Welcome Bonus up to £50 + 100 Extra Spins

18+ New Players only. T&C's Apply. Gamble responsibly. www.begambleaware.org

37

1000's of Slot Games

18+ T&C Apply.

38

100% Welcome Bonus up to £200 + 100 Extra Spins

18+ New Players only. T&C's Apply. Gamble responsibly. www.begambleaware.org

39

100% Welcome Bonus up to £500 + 100 Extra Spins

18+ New Players only. T&C's Apply. Gamble responsibly. www.begambleaware.org

40

£50 Welcome Bonus + 20 Extra Spins

New UK & IRL Customers only. Min deposit £10 . Deposits made with e-wallets are not valid for this promo. Bonus wagering x35 on eligible games. Winnings from bonus capped at £500. Spins available after bonus is redeemed/lost. 10 per day with no wagering. Full terms & conditions apply.

41

Deposit £10, Get £50

18+. New customers only. Min spend £10 on qualifying games. Certain deposit types excluded. £50 Bonus on selected games subject to 40x wager req. Must accept within 7 days, valid for 30 days. Player restrictions and T&Cs apply.

42

Play 100s of Slot Games at Guts

18+ T&C Apply.

43

100% Welcome Bonus up to £800

18+ New customers only. Opt-in required. 1st deposit bonus 100% up to £200. 2nd deposit bonus 50% up to £200, 3rd deposit bonus 25% up to £200, 4th deposit bonus 25% up to £200. Min deposit £10. 40x wagering, 30 days to complete wagering, eligibility, game weighting and game restrictions apply. Max Bet with bonus funds £5. Max withdrawal from bonus funds is £2000. Eligibility restrictions apply, cash balance can be withdrawn at any time. T&C's Apply. Gamble responsibly. www.begambleaware.org

44

100% Welcome Bonus up to £123 + 10% Cashback

New players only, Maximum bonus is £123, Max bet with bonus is £5, No max cash out, Wagering is 50x - Skrill & Neteller excluded, Eligibility is restricted for suspected abuse, Cashback is cash, so no wagering, Cashback applies to deposit where no bonus is included. Full T&C’s apply

45

150% Welcome Bonus up to £150 + 50 Extra Spins

Opt in required. Min deposit $10. Max bonus $150. 40x wagering requirements on bonus funds. Bonus and spins expire 7 days after opt in. Spins available on selected games only. Max redeemable $2,000 from deposit bonus. Max redeemable from spins $10. New customers only. Player currency, country, game restrictions & Terms Apply.

Guide to the Best Slot Sites

Online slots offer an extremely convenient way to bring the excitement of the casino floor into your home. They have become increasingly popular in recent years, leading to a proliferation in the number of sites offering slots online. The world’s largest bookmakers and land-based casinos now target UK players with online slot games, putting them in direct competition with specialist online casinos. They are all seeking to secure your business, and it can be difficult to know which sites to choose.

Fortunately we have done your homework for you. Our expert team of reviewers constantly assesses the relative strengths and weaknesses of all the online slots UK sites, allowing us to recommend only the best online slots providers. It is important to stick to the respectable, trustworthy sites that we recommend on this page, as a number of shady, unlicenced operators will also try to lure you in. We can help you separate the honest sites from the scammers and help you find online slots providers that offer great bonuses, fast payouts, impeccable software and superb customer service.

This article explains how we rate the best online slots sites UK, the types of online slots you can enjoy and how the bonuses work. We also highlight exciting new online slots, the best mobile slots and the leading software providers. You will learn what terms like RTP (return to player), RNG (random number generator) and progressive jackpot mean, find out more about the top-rated online slots of 2020, learn how to play the games, discover the payment methods at your disposal and absorb the fascinating history of online slots. Once you have read this article, you will be armed with all the information you need to enjoy the best online slots in the business.

How We Rate The Top Slots Sites in the UK

The CasinoSource team of expert reviewers performs a thorough assessment of all the different online slots sites before making recommendations. They sign up for an account at each site and monitor the simplicity of the process, while also assessing the level of security provided. They test the bonus offers and compare them against rival sites to see how much value they offer players. Our reviewers will make deposits via various methods and play the games on offer, testing them for fairness, speed, graphics and usability. They make withdrawals and assess how long it takes for payouts to arrive, while also interacting with customer service representatives and gauging how polite, professional, helpful and friendly they are.

The key criteria they look for are game variety, game quality, user experience, bonuses and the types of slots on offer. They give each online casino a star rating for these five categories, while also breaking each review down into bonuses and promotions, registration, deposits and withdrawals, experience, mobile play, software, game choice, VIP programs, customer support, security, responsible gambling and more. Then they give an overall score to each video slots online site, allowing you to compare them and find the best online slots.

The best online slots UK sites work well on a number of devices, provide a compelling range of bonuses and offer a wide range of different banking methods. They have a history of paying customers on time, treating them with respect and keeping personal and financial details secure. We only recommend trusted sites that tick all these boxes. Our reviewers also constantly pay attention to the new online slots sites that are launched, as exciting new operators continue to muscle into this space. They revisit sites on an ongoing basis to check that they maintain the highest standards, ensuring that you receive up-to-date information at all times.

Types of Online Slots

The online slots sector has grown increasingly sophisticated in recent years. Players now have a thrilling array of different games to choose from, and many of them follow entertaining themes, but they can be broadly divided into five key categories:

  • Video slots | These are the original online slots games and they continue to dominate the online slots industry. Video slots online include the classic 3-reel and the more elaborate 5-reel slots, which can contain exciting features like wilds and scatter symbols, with live-action backgrounds and animations to keep you entertained. The best video slots of 2020 include Kingdoms Rise: Captain’s Treasure, Wheel of Fortune, Starburst and Mega Joker.
  • 3D Slots | Online slots have been given another exciting dimension with the advent of 3D slots, which are growing increasingly prevalent. The play is exactly the same as video slots, but the graphics have been given an update, there is a stronger narrative and the overall experience is more immersive. Top 3D slots of 2020 include The Rift, Turning Totems, Gonzo’s Quest and Jungle Jim El Dorado.
  • Progressive Jackpot Slots | These games have proved extremely popular, as they offer players the chance to win huge prizes off relatively small stakes. A small portion of each player’s stake contributes to the jackpot, which continually rises until a player finally triggers it. There have been many instances of players receiving seven-figure and even eight-figure prizes lately. Top progressive slots of 2020 include Mega Moolah, Age of the Gods and Mega Fortune.
  • Fruit Machines | These slots mimic the machines that you will find in bars and arcades across the UK, featuring 3 reels and a payline in the middle. Symbols generally include classics like fruit, bells and the number 7. They give you the option to hold or nudge reels, adding another layer of intrigue. The best fruit machine games at online slots sites for 2020 include Fruit Shop, Booming 7 and Fruit Fiesta.
  • Branded Slots | The trend for themed slot games has accelerated over the past few years. They are similar to video slots, but they follow a narrative based on a famous movie, TV show or band. Some of the best for 2020 are Game of Thrones, Britain’s Got Talent, Rocky and Guns’N Roses.

Online Slots Bonus Options

Most sites use an online slots bonus in a bid to attract new customers. They are varied, and they come with different wagering requirements attached, so it pays to shop around for the best offers. For example, one site might offer a 200% welcome bonus up to £500, plus 50 bonus spins, meaning you will receive £750 to play with and 50 extra spins if you deposit £250 of your own money. A rival site might offer a 100% welcome bonus up to £300, plus 300 extra spins. That would give you £600 to play with, along with 300 bonus spins, if you deposit £300 of your own money.

Another important factor to bear in mind it the wagering requirement, otherwise known as the rollover requirement. This refers to the number of times you need to play this bonus credit before you can think about making a cash withdrawal. You might have a 35x rollover requirement attached to the 200% welcome bonus up to £500, and a 40x rollover requirement attached to the 100% welcome bonus up to £300 promotion. Many players like to the lowest wagering requirements for bonuses on online slots.

Ideally you want the largest matched deposit bonus possible, as many free spins as possible, and the lowest rollover requirements possible. You generally have to make a compromise when selecting casino bonuses, but some sites offer a really compelling, rounded bonus in a bid to attract new customers. Some online slots sites also offer a free online slots no deposit bonus. If you ever see a free online slot no deposit offer, it is well worth accepting, as you do not need to deposit any of your own money, and you could earn a cash withdrawal if you are successful.

UK Mobile Slots Sites

The best online slots UK sites now bring a myriad of exciting gaming experiences directly to the palm of your hand. This is very convenient, as you can play the very best video, 3D, progressive jackpot and branded slots while lying on the sofa, sitting on your lunch break, travelling to meet friends or anywhere else. The first mobile slots sites offered a minimal range of games, the graphics were rudimentary and there were frustrating lag times, but now the sector is extremely sophisticated. Some UK mobile slots sites are now actually better than their desktop counterparts.

Most online slots sites are now adapted with HTML5 to be played on any mobile and tablet and any OS including iOS, Android, Windows Phone. Some can be accessed via your mobile browser, but many of the best online slots casinos now have dedicated mobile apps. Mobile use among Brits continues to skyrocket with each passing year, and mobile casinos are growing in popularity too. New online slot sites are launched on a regular basis, and many of these online slot sites now have a mobile-first strategy.

Best Slots Software Providers

The online slots industry is blessed with a wealth of extremely talented software providers. They all compete to launch the most exciting games each year, and the real winner is the player, as the top online slots are continually improving. These are the most important online slots software providers:

  • Microgaming | The Isle of Man-based firm is one of the world’s largest online slots providers. It supplies hundreds of titles, including Mega Moolah, Game of Thrones, Mermaids Millions and Thunderstruck II.
  • Playtech | The Matrix, Superman, Top Gun and American Dad are some of the exciting branded slots that Playtech has produced. It is also famous for making Age of the Gods and Frankie Dettori's Magic Seven, among many others.
  • NetEnt | This Swedish software supplier is responsible for some of the best online slots games of all time, including Starburst, Gonzo’s Quest and Mega Fortune. It has also produced branded video slots such as Gordon Ramsay’s Hell’s Kitchen, and NetEnt casinos are very popular among players.
  • Play’n GO | This is another Swedish company with a wealth of exciting online slots to its name. Play’n GO is responsible for hits such as Troll Hunters 2, Book of Dead and Mystery Joker.
  • IGT | International Game Technology is a multinational firm headquartered in London, with offices in Las Vegas, Rhode Island and Rome. It is a pioneer in the field of branded video game slots, and its biggest hits include Family Guy, Da Vinci Diamonds, Pharaoh’s Fortune and Cleopatra.
  • SG Digital | The digital division of Scientific Games produces a number of exciting slots after purchasing providers NYX Entertainment and NextGen. They include Raging Rhino Megaways, Lucky Lanes and Prisma Blast.
  • Novomatic | Austrian software provider Novomatic celebrated its 40th birthday in 2020. It works with several of the best online slots UK sites and releases new online slots on a regular basis. They include Sizzling Hot, Book of Ra and Lord of the Ocean.
  • Betsoft | This software firm is renowned for quirky releases such as The Slothfather and Good Girl Bad Girl. It has a particular focus on mobile casinos and 3D slots.

Online Slots Tournaments

The best online slots sites that we recommend often host tournaments based on a particular slot – typically either a classic game or a hot new release. You can join this tournament and bid to complete the challenges in order to climb up the board and win prizes. Exciting prizes include cash, trips, cars and gadgets. These online slots tournaments are generally hosted in collaboration with the software provider in order to boost the profile of a particular game. They provide players with a great opportunity to earn valuable prizes and they are always worth seeking out at the top online slots UK sites.

Payouts and RTP

The key concept you have to familiarise yourself with when playing slots online is RTP, which stands for return to player. This percentage refers to the amount of wagered money a particular slot will return to you over a prolonged period of time. It essentially refers to the house edge. If a slot has an RTP of 94.75%, it means the average will eventually get back £94.75 for every £100 staked.

However, slots are games of chance, so some players will make a profit and others will make a loss in a playing session. The RTP gives you an idea of the average return you can expect. You should look for as high an RTP as possible. NetEnt’s Mega Joker has offered an RTP of up to 99%, while Jackpot 6000 goes up to 98.8%, making them some of the best games for players.

You should be presented with a payout table when you browse the games at the best online slots sites. It should tell you the symbol values, the special values and the paylines, while explaining the features and providing any relevant jackpot information. Payout tables should list the prizes either as a cash amount or as a multiplier. For example, if you see “100x”, it means you stand to win 100 times the size of your single line bet. It should inform you of the online slots bonus rounds and the minimum and maximum prizes. You can use this information to determine your projected payouts at new online slots.

Online Slots Rules: How to Play Online

Use our comparison tool to find your perfect match, click on the link to visit the site and then set up an account by following these steps:

  • Click the button that reads “Sign Up”, “Join Now” or “Register”.
  • Provide your personal details, select your username, choose a strong password and select GBP as your currency.
  • Agree to the terms and conditions and confirm your age.
  • You will need to verify your email address by clicking through on a link, and follow a KYC procedure to confirm your ID. You generally need to provide a copy of photo ID and proof of address.
  • Choose your online slots bonus if applicable.
  • Visit the cashier and make a deposit using your preferred payment method.
  • Select a slot that appeals to you, paying careful attention to the payout table.
  • Set your bet and hit the spin button. Set the maximum bet per line if you are playing a progressive jackpot slot.
  • Keep playing until you decide to make a withdrawal. Remember that all wins read from left to right.
  • Visit the cashier to make a withdrawal. Choose your preferred withdrawal method, enter your amount and confirm. Withdrawals are never instant, and wait times should be made clear in the terms and conditions.

Top Rated Online Slots Games 2020

The best online slots are a matter of personal preference, as everyone has different tastes, but some slots have proved universally popular over the years. They include classics like Gonzo’s Quest, Mega Moolah and Rainbow Riches. A number of new online slots have also drawn considerable praise from players since launching in 2020:

  • Happy Riches
  • Immortal Glory
  • Mayan Eagle Nobleways
  • Nyjah Houston Skate for Gold
  • Gems of Adoria
  • Age of Conquest

Online Slots with the Biggest Progressive Jackpots

A number of UK slots players have won life-changing sums by playing progressive jackpot slots at the best online slots UK sites in recent years. The most famous triumph came in 2015, when an English soldier called Jon Heywood won a cool £13.2 million playing Mega Moolah. He staked just 25p on his final spin and landed the jackpot, which saw him land a place in the Guinness Book of World Records.

A Finnish player has since topped it by playing Mega Fortune, but many British slots lovers are bidding to claim a new record each day. There are many more examples of players winning multimillion-pound payouts from online slots UK, and these are the online slots with the biggest progressive jackpot payouts:

  • Mega Moolah
  • Major Millions
  • Arabian Nights
  • Hall of Gods
  • Beach Life

Slots Payment Methods

The best online slots sites will offer you a wide range of payment methods for making deposits and withdrawals. Credit and debit card payments are popular among visitors to online slot sites UK. You can alternatively use an e-wallet such as Neteller or PayPal, but you will probably not be allowed to claim a bonus if you opt for Neteller or Skrill. This is designed to prevent bonus abuse. Vouchers such as a PaySafeCard are accepted at many new online slots sites, along with other prepaid cards, while you might also see niche methods.

Withdrawal times vary depending on the online casino you play at and the withdrawal method you choose. As a rule, bank transfers are normally a lot quicker than receiving a cheque in the post. You should expect to receive withdrawals via the same method you used to make a deposit, as this is a licensing condition designed to stamp out money laundering.

Slots RNG (Random Number Generator) and How it Affects the Games

A random number generator is used to calculate the result each time you hit spin on an online slot game. An RNG is also used on physical slots found in casinos and arcades, and it is also used to determine the results of online casino like roulette and blackjack. The RNG produces a random number at the software underpinning the game each time you hit spin.

This random number goes through the game software and produces a tangible result, resulting in a win or loss for the player. All licensed operators targeting UK players will fall under the jurisdiction of the UK Gambling Authority, which monitors the RNG technology that online slots sites use to ensure it remains fair and unaffected by any activity outside of the game engine.


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Slots Selection at Online Casinos

There are several trustworthy casinos with attractive welcome bonuses, slick software and great customer service. What often sets them apart is game variety. Not all online casinos are created equal, and you will find a much broader choice of exciting games at some of the best online slot sites. UK players have a wealth of options to choose from, so it makes sense to identify an online slots site with a great selection of games. Some players do not mind a small, streamlined selection, but it can grow boring after a while. The best online slots casinos list thousands of different games, created by multiple software providers, ranging from industry titans like NetEnt and Microgaming to small, independent studios.

History of Slot Machines

The first online casinos launched in the UK back in the mid-1990s, with a limited selection of basic video slots and virtual table games. Players were faced with rudimentary graphics, lag times, games cutting out and a poor selection. However, the industry quickly matured. Major high-street bookmakers like William Hill and Ladbrokes piled in, land-based casino launched video slots online and digital sportsbooks branched out into casino games.

Increased competition forced operators to launch increasingly attractive online slots bonus promotions, and broaden their ranges. That led to an explosion in the number of software providers working in the space, and the overall level of quality and variety on offer soared. By the mid-2000s, progressive jackpots went past the £4 million mark, inspiring millions more UK players to get involved in the action.

The growth in online slots accelerated with the launch of iOS and Android in 2008, and mobile casinos have continued to grow ever since. Now 3D slots are pushing the sector in intriguing new directions, and virtual reality promises to make the best online slots even more exciting in the years ahead.

FAQ

What is the best online slot site?

Some players prefer sites with a wide variety of games, while others place more emphasis on bonuses or betting limits, so it really is a matter of opinion. However, you should always look for trustworthy, reputable operators that provide a quality experience, treat you fairly and pay you out on time. With that in mind, some of the best online slots real money sites include PlayOJO, Casimba, All British Casino, Dream Vegas, PlayZee, Sloty and 888 Casino.

Which slot sites offer the best odds?

The overall profitability of each site is determined by the return to player percentage, while many players also look out for the maximum payout on the pay table. You should therefore find a site that hosts online slots games with a high RTP and progressive jackpot games that offer you the chance to win a fortune. The best online slots sites carry hundreds or thousands of games, so you should look at the potential payouts on a game-by-game basis.

Which slots have the biggest payouts?

Progressive jackpot slots offer the largest potential payouts. Look out for slots like Mega Moolah, Mega Fortune, Jackpot Giant and Hall of Gods. Players have received multimillion-pound payouts by playing these games at the best online slots sites.

Is it possible to win real money on online slots?

You can most certainly win real money by playing online slots. The games on offer for UK players should all be online slots real money games, as free online slots are not permitted in this country. The maximum payout varies from slot to slot, but you can win more than £10 million in real money if you get lucky.

Which is the best slot game?

You can choose from a wide range of slot games falling into various different categories, from classic 3-reel slots to 3D slots, so it really depends on personal preference. Some players prefer the streamlined nature of 3-reel slots, while others like the potential to win big at progressive jackpots and some players are all about the branded slots like Game of Thrones. Slot games that regularly prove popular include Starburst, Mega Joker and Wheel of Fortune.

Can I play online slots for free?

Free online slots are not permitted in the UK, so it is not possible to play free slots online with a reputable operator. All sites licensed by the UK Gambling Authority will not permit any free slots online, as they could lose their licenses. You should therefore be wary of anyone offering free online slots games or free online slots no deposit offers, as they could be unregulated and unsafe.

What are the top 3 progressive jackpot slots?

The top 3 progressive jackpot slots are Major Millions, Arabian Nights and Beach Life, while Hall of Gods is also vying for a top 3 spot. The number of progressive jackpot online slots has proliferated in recent years, so you now have plenty of intriguing options to choose from as you bid to strike it rich.

Are online slots fair and trustworthy?

All licenced and regulated online slots are fair and trustworthy. Look out for games designed by leading software providers and reputable online casinos that fall under the jurisdiction of the UK Gambling Authority. The UKGA regularly tests the random number generators underpinning legal online slots to ensure they are fair and trustworthy. Stay away from unregulated sites with a bad reputation, as they could simply scam you with unfair, untrustworthy games.

Where can I find new slot games online?

You should find a steady stream of exciting new online slot games if you sign up for an account with leading sites, as they constantly refreshing their offering to ensure player satisfaction. Casino Source regularly provides updates on all the newest slot games for UK players, so you will know exactly what to look out for.

How to win at online slots?

There are various steps you can take in order to boost your chances of winning at online slots. You should always take advantage of online slots bonus offers and free spin promotions, as they can make all the difference when it comes to turning a profit. Conduct plenty of research and stick to slots with a high RTP at trustworthy sites, always check the pay tables and learn to quit when you are ahead. You should always check the volatility of each game, as it is often easier to win on a high volatility game.

Is it possible to play online slots on mobile?

A number of great mobile casinos bring thousands of slots direct to your fingertips. You can either download an app or access the mobile casino via your browser, and then enjoy a wealth of different games. They are all optimised for mobile use, and the whole process should be seamless at the best online slots UK mobile sites.

Which slot sites can give a no deposit bonus?

Several online slots sites have given out no deposit bonus offers in the past. They rotate their promotions on an ongoing basis, but Casino.com, 888 Casino and Slots Heaven have offered free online slots no deposit promotions.

How to get a free sign-up bonus on slot sites?

The online slots UK sector is extremely competitive and some operators will therefore give you a sign-up bonus without requiring you to deposit your own money. The idea is that you will be blown away by the range of exciting games and then become a long-term customer. Remember that the no deposit bonus offers will come with wagering requirements attached, so you would need to jump through several hoops before facing the possibility of withdrawing real money.

Can the free spins bonus be used on all slots?

It varies from casino to casino, but a free spins bonus is usually restricted to certain slots. You can check the bonus terms and conditions to learn if any slots are included in the promotion or excluded from it.

Why should I consider slots RTP?

This is a crucial consideration for players, as it determines how profitable each slot is overall. You should try to find online slots with the highest possible RTP, as that offers you the best chance of generating an overall profit.

Should I choose a low volatility or a high volatility slot?

The odds of winning when playing a high volatility slot are below average, but the wins pay more. If you incorporate the correct strategy, high volatility slots can be more rewarding than low volatility slots. Low volatility slots offer a higher chance of winning, but the winning combinations are lower and winning combinations do not result in the highest payouts.

Are slots sites licensed in the UK?

Several slots sites are licensed in the UK, but there is always the danger of unlicensed sites trying to lure you in. You should always remain vigilant and stick to the best online slots UK sites recommended on this page. We only recommend licensed, trustworthy operators.

Contributor

Lena Sciberras
Lena Sciberras
Reviewer since 07/2020
Lena Sciberras is our Casino Content Manager. Lena has been covering online casino and gambling related topics in multiple online publications. She believes in delivering fresh, useful, in-depth and unbiased information, tips, reviews and guides to the casino players around the world. Her main priority is to educate the readers about the best online slots, their mechanics and payouts.
Interests: Poker, Online Slots, Casino