Best Online Slot Sites
See our selection of the best slot sites in the UK and make sure to explore some of the great bonus offers available.
- 1
Established 2018100% Up To £300 bonus + 150 bonus spins on eligible Netent Games
18+. New players only. One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£100: max £100 bonus + 150 spins on selected games; £101-£200: max £200 bonus + 100 spins on selected games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins credited as bonus and capped at £100. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute to wagering requirement. Bonus funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org." - 2
Established 1997
100% Welcome Bonus up to £250
18+. UK players only. New customers only. Minimal initial deposit £10. Once the offer is claimed players have 30 days to release equivalent to initial deposit as a cash reward up to £250. 50x wagering requirement before cash rewards applied. Certain deposit options are excluded. T&Cs apply - 3
Established 1997
£88 Free No Deposit Needed + 100% Welcome Bonus up to £100
New players only • No Deposit Offer: Claim in 48 hrs • 14 day expiry • FP wins are credited as bonus and capped at £10, exc. JP win • 50x wagering • Deposit Bonus Offer: £20 min deposit • Valid for selected games • Bonus wins capped at £500 • 30x wagering – req. vary by game • Bonus expires within 90 days • Withdrawal terms, No Deposit Offer terms & Deposit Bonus Offer terms apply. - Full Terms Apply - 4
Established 2015
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. - 5
Established 2017
100% Welcome Bonus & Up to £200 On Your First deposit + 50 Bonus Spins
18+. New players only. Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org - Full Terms Apply - 6
Established 2004
Play £10, Get 30 Extra Spins on Double Bubble
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. **£10 lifetime deposit for Daily Free Games. - 7
Established 2019
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., 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. - 8
Established 2021
Deposit £10 , Get 30 Extra Spins
New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. Extra Spins: on Secrets of the Phoenix Megaways. Spins value: 20p each. Play Responsibly. BeGambleAware.org. 18+. £10 lifetime deposit for Daily Free Game. Full T&Cs apply. - 9
Established 2012
100% Welcome Bonus up to £100 + 10% Cashback
Welcome bonus for new players only | Maximum bonus is 100% up to £100 | Min. deposit is £20 | No max cash out | Wagering is 35x bonus | Maximum bet with an active bonus is £5 | Eligibility is restricted for suspected abuse | Cashback is cash with no restrictions | Skrill & Neteller deposits excluded | Cashback applies to deposits where no bonus is included - Full Terms Apply - 10
Established 2020
Welcome Package of 100 spins + up to £200 bonus
Applies only to new depositing players. 18+. Minimum deposit: £10. 35x Wagering requirement applies to match up bonus. Spins credited in specific games. Spins expire after 24 hours. Wagering requirement applies to spins. Terms and Conditions apply.
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Our Picks for Best Online Slot Sites
Before we get on to anything else, we’re diving straight in with our top choices for the best UK online slot sites. Our slots experts at Gambling.com will always give you the real deal, with upsides and downsides for each casino we recommend so you can trust our reviews.
Rainbow Riches
Rainbow Riches hasn’t been around for a long time, but it’s quickly climbed to the top of the very best online casinos around. Apart from all the traditional casino games, live dealer games, bingo, and Slingo, slot players can also find around 150 slot games on offer. Granted, this doesn’t seem like a big number, but it’s got all the leading titles, adding more each day.
If you love playing the top online slots, you’ll also love the Rainbow Riches welcome bonus offer where you’ll get 30 free spins when you make a £10 deposit. If you’re a current Rainbow Riches player, make sure to check out its bonus and promotions for existing players as these can range from special prize draws to cashback offers.
Play £10 Get 30 Extra Spins on Rainbow Riches
PartyCasino
If you’re looking for a wide game selection from leading slots software providers, head over to PartyCasino and check out its slots selection. There are over 1,000 online slot games to choose from, as well as loads of other casino games – all powered by leading developers such as Pragmatic Play, NetEnt and Play’n GO.
The PartyCasino bonus welcome offer is great, with matching your first deposit 100% up to £250. Slot fans who already have an account can enjoy promotions such as the Free Spins Prize Wheel and the Daily Drops, Weekly Wins offers.
100% Welcome Bonus up to £250
Dream Vegas
Dream Vegas has managed to get over 3,000 games in its portfolio in just 3 years, all coming from the best game developers. In addition, Dream Vegas also has one of the best sign-up offers since it spans over your first three deposits. For your first deposit, you'll get a 200% deposit bonus of up to £2,500 plus 50 free spins for any game by NetEnt. On your second deposit, you'll get a 40% deposit bonus up to £3,000 and 30 free spins for any NetEnt game, and on your third deposit, you'll have 60% of your deposit matched up to £1,500 and 40 free spins on any NetEnt game.
Current players can take advantage of other Dream Vegas promotions, such as the Car or Cash? offer, which will give you the chance to win a Range Rover or its equivalent in cash.
100% Up To £300 bonus + 150 bonus spins on eligible Netent Games
Playzee
Wither over 1,000 games, 24/7 customer supports, and great bonuses for new and existing players, Playzee just had to make our list. Slot players will not only get to enjoy all the top online slots, but they can also look for lesser-known games by niche developers like Neon Valley Studios or try their hand at one of Playzee’s over 80 progressive jackpot games.
The design of the online casino is minimalist, but this works well if you’re looking to focus on the game you’re playing. Besides, with a 5-tier Zee Club VIP program, lucrative Playzee bonuses and sign-up offers, this seems like quite a small thing.
100% up to £300 + 100 Spins
MONOPOLY Casino
MONOPOLY Casino is a unique online casino site dedicated to the popular MONOPOLY board game. A lot of the games are themed, and some are even exclusive, such as the MONOPOLY 250K slot game and the thrilling live dealer MONOPOLY game. The selection of slot games on offer isn’t as big as at some of the other casinos on this list, but you’ll still be able to find the most popular titles, with new slot games frequently added.
MONOPOLY Casino also gives you the choice to play at either the website or by downloading the casino app, which has all the games on the site. Either way, make sure to check out MONOPOLY Casino’s welcome bonus offer and keep returning to the casino for other great offers such as guaranteed Box Bonanzas, cash backs, and prize draws, to name a few.
Spend £10, Get 30 Extra Spins on MONOPOLY Paradise Mansion
Casimba
Casimba is fast becoming one of the most renowned online casinos in the UK. This is due to the thousands of games on offer, efficient customer support, and a multi-faceted welcome offer that spans across your first three deposits.
Casimba bonus offers are available upon signing up, and apart from having a percentage of your first three deposits matched, you will also get a number of free spins each time. Mobile players will be happy to know that they can play all of Casimba’s casino games on the go through the casino app.
100% Welcome Bonus & Up to £200 On Your First deposit + 50 Bonus Spins
Virgin Games
Virgin Games has been around for quite a while now and has gained the trust of many UK online casino players. Apart from being a reputable casino, Virgin Games Casino boasts over 200 slots among many other casino games such as blackjack, poker, and roulette. Its progressive jackpots are also known to hit the five figures when entering the bonus rounds in the slot.
Both the Virgin Games website and app are very user-friendly. Each game has its own ‘how to play’ feature, and the Virgin Games welcome bonus offer is available through either. Unfortunately, if you’re a high-roller, there is no VIP program available, but the game experience at this casino is quite incredible, with all the games being fully-optimised.
Play £10, Get 30 Extra Spins on Double Bubble
BetVictor
Sports betting and casino enthusiasts are sure to be familiar with BetVictor. BetVictor Casino is also a dream for online slot fans, with more than a thousand top-quality games and over 60 progressive jackpots (most of them in the seven-figures!) available from more than two dozen software providers.
For BetVictor Casino bonus, new players at BetVictor casino can get £70 when placing a £10 wager - £20 casino bonuses for slots and tables games, and three £10 bonuses for blackjack, roulette, and game show titles. At the time of writing, there are no bonuses running for existing players, but there are promotions on offer from time to time.
Wager £10, Get £30 + 100 Extra Spins
Mr Green
If you prefer playing your favourite slots on mobile, Mr Green is the casino for you. With a slick design, impressive graphics, and a wide range of slot software providers, you’re sure to find a slot to suit your taste. The only downside we can think of is having to go on a separate page when altering your bet level in the slot games, but that seems like a small price to pay in comparison with all the custom-built mobile options from Mr Green’s game developers.
Apart from that, new players can take advantage of a 100% deposit match bonus of up to £100, and existing players can take advantage of other promotional offers like the chance to win free spins every day!
Best Slot Sites in the UK
Over the years, online slot games have become increasingly popular, and there seems to be no slowing down on the horizon. Because of this, more and more casino sites are offering slot games online, and it can seem quite daunting to separate the best from the worst.
However, we’ve done the work for you. The best independent slot sites will all hold a licence from the UK Gambling Commission (UKGC) or a respective jurisdiction. They will offer attractive online slot offers, many including a free spins bonus, and their games will all be fully optimised for mobile play. Apart from that, the best slot sites that we recommend will have a huge selection of banking options, with fast withdrawal times for you to get your winnings.
Good Slot Sites for New Players
If you’re just starting out in the slot world, we recommend looking for English casino sites which are run by fair and trustworthy operators. The best slot sites in the UK will also have enticing sign-up offers and a wide variety of games to choose from. All the online slot sites we recommend on this page fulfil these requirements, so we encourage you to go ahead and start this fun journey with one of the casino sites on this page.
All Slot Sites
Whether you’re an inexperienced or regular player, you can rest assured that any slot site mentioned on this page will follow all regulations for players in the UK and will be licensed by the UK Gambling Commission. At Gambling.com, we review all the slot sites and cover all the bases so that you can go ahead and play confidently, knowing what to expect and exactly what you’re getting.
Why Play Slots Online?
One of the key differences between online and brick-and-mortar casinos is the ability to play online slot games from the comfort of your own home. We live in an age where people have less time than they ever have, meaning that getting out to a casino to play slot machines is not as accessible as it maybe once was.
The online element allows a player to log in and start playing as and when they choose. The development of the mobile slot game has allowed us to take this one step further and play slots whilst on the go. We talk more about this later in the article, but there is no doubt that the mobile extension has been as popular as online was.
A key point that many people overlook when looking at playing any online UK slots is Return to Player (RTP) percentages. The RTP percentages are higher online than in most casinos, offering a much better deal for the player.
For context, most leading independent slot sites offer online slot games with an RTP of between 93 and 98%. Most land games that you play will be around the 90% mark, but it’s common to see a decent number down toward 80%, which is a huge difference, giving the casino an incredibly high edge with these games.
Finally, the rate that new slot games are released means this is an exciting and constantly moving sector of an online casino. They come out almost daily these days, which means it never stagnates.
Online Slot Games Variations
One of the major developments in casino slots online UK has been the variations in which they are now developed. Slot game types come in all shapes and sizes, so it’s important to know which ones to look out for and which ones are going to best suit your eye.
Branded Slots
Branded slots are now some of the most popular games that you can play online. These are the games that are attached to the likes of movies, TV shows, game shows, sports teams and any other brand you can think of.
You’re going to find that branded titles are a little more polished than your average video slot. There are a couple of reasons why this is.
The first is that the budget to make the slot is often higher given that they’ve got the financial backing of a successful brand behind them. This means that they can push technologies and therefore create more immersive games.
Next, branded games need to be of a certain standard as they need to reflect the brand. For example, if you’ve got a slot called “Jewels” which is rubbish, people will just avoid the game and think nothing much of it. However, if the game is Monopoly, people will associate this with the brand, devaluing it.
Standout games include The Dark Knight, The Simpsons, Batman, Scarface, Jumanji, and Jimi Hendrix.
Video Slots
Video slots are what we like to refer to as the “bread and butter” of the online slots UK section. The majority of games that you see online are video slots.
These games often come with features such as pay lines, slots bonus rounds, side games, great graphics and even mini-games. They’ve taken the classic slot game and then applied modern-day technology to make them more immersive and more exciting to play.
Games are going to range in terms of RTP and variance, which makes them exciting for both players and developers.
Standout games include Gonzo's Quest, Starburst, Dead or Alive, and Twin Spin.
Jackpot Slots
The jackpot games are the big money slots. This is where you can win life-changing sums of money from just a simple spin of the wheel. As a result, they are often the most popular variety of online slot games.
There’s a lot of confusion about how these work and that’s because there are two types of jackpot games; progressive and standard.
Your standard jackpot game is usually hosted by either the casino or the developer. They set up a jackpot for that game and this will be triggered when the player hits the winnings combination. Once won, the jackpot is reinstated, and the game plays out again.
A progressive jackpot slot is a game that sees its potential jackpot continue to rise the more players play the game. They take a small cut of every spin, and this sum goes into the jackpot.
These games are the biggest jackpot games, as they are often hosted by the game developer. This allows the jackpot to grow across multiple casinos via the same game, massively increasing exposure and, therefore, increasing the jackpots on offer.
We’ve gathered the biggest jackpot slot games below. Have a look at our list to find out which games are the best to win and what their RTP is.
- Mega Moolah – RTP: 88.12% - Jackpot Value: £1,000,000 min.
- Gladiator – RTP: 94.10% - Jackpot Value: £2,000,000 min.
- Book of 99 – RTP: 99.00% - Jackpot Value: £500,000
- Millionaire Genie – RTP: 95.02% - Jackpot Value: £1,000,000 min.
- Hall of Gods – RTP: 95.50% - Jackpot Value: £4,314,000
- Millionaire’s Club III – RTP: 94.55% - Jackpot Value: £175,000
- Deal or No Deal: The Banker’s Riches – RTP: 95.21% - Jackpot Value: £250,000
- Monty Python’s Spamalot – RTP: 93.99% - Jackpot Value: £1,000,000 min.
- Major Millions – RTP: 96.88% - Jackpot Value: £250,000 min.
- Mega Fortune – RTP: 96.00% - Jackpot Value: £500,000
| Brand | Slot Providers | Total Jackpot Slots | Total Slots | Mobile Slot Providers X | Visit Site |
|---|---|---|---|---|---|
Established 2018 | 112 | 107 | 1421 | 100 | Visit Site |
| 18+. New players only. One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£100: max £100 bonus + 150 spins on selected games; £101-£200: max £200 bonus + 100 spins on selected games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins credited as bonus and capped at £100. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute to wagering requirement. Bonus funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org." | |||||
Established 2018 | 109 | 88 | 1672 | 107 | Visit Site |
| 18+. New players only. min deposit £20. Max bonus £5. Winnings from spins capped at £50. 100 Zee Spins valid on Starburst (first 10 credited immediately upon first deposit; rest credited at 07:00 GMT at 10/days). Spins must be used by 23.59 GMT of the day on which they are credited to player account, any unused shall be removed. Bonus funds must be used within 30 days. Bonus funds are separate to cash funds, and subject to 35x wagering (bonus + cash). Full terms apply. BeGambleAware.org | |||||
Established 2017 | 103 | 70 | 1386 | 100 | Visit Site |
| 18+. New players only. Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org | |||||
Classic Slots
The classic slots games are stripped-down online slots UK, often mimicking games from a bygone era. The games have fewer pay lines, fewer features and generally have fewer winning combinations.
It may sound pretty dull, but the games are designed to remove all the “noise” that comes with video slots and allow players to enjoy the simplicity of these games for what they are. It’s worth noting that some of the classics can have the highest RTP.
Standout games include Super Nudge 6000, Break Da Bank, Double Whammy, and Red Hot Wild.
Real Money Slots
While playing online slots is fun on its own, the thrill is always higher when there’s a chance to win some real money. There are thousands upon thousands of real money slots out there, but not all of them are as lucrative.
Our team at Gambling.com has taken the initiative to find the most paying slots, and from our testing, we’ve come up with a mix of what we think are some of the best games in the business right now.
Best UK Real Money Slots
Here’s our list of the top 10 real money online UK slots. The games below aren’t just all video slots either, with a nice mix to get your juices flowing.
- Starburst – You’re going to need to get to know Starburst well if you start to claim any bonus spins from your online casino. The majority of them are targeted towards this game and as a result, is a great beginner slot with a friendly 96.08% RTP.
- Book of Dead – This slot is part of the popular Riche Wilde series from Play’n GO. Launched over 5 years ago, Book of Dead remains one of the best games to play with all the features and free spins on offer. The RTP is a decent 96.21% and you can win up to half a million pounds if all works in your favour.
- Bonanza – Another hit from Big Time Gaming, Bonanza offers loads of exciting gameplay with an unusual grid layout, a mini bonus game, and unlimited multiplier wins and other features. It is highly volatile and has an RTP of 96%, but if you’re looking for a thrilling, high-risk game, this is the one for you.
- Wolf Gold – A visually stunning game, Wolf Gold also comes with multiple bonus features and a jackpot that offers Mini, Major, or Mega prizes. Every player is in with the chance of winning 250,000 coins, and it is a medium volatility slot, making it perfect for players who have never played a jackpot slot before.
- Gonzo’s Quest – This is one of the most iconic video slots in the industry. It started life as a NetEnt catalogue game but is now arguably a brand of its own. A slot packed with features, slot bonus rounds, free spins, and a great storyline. What more could you want?
- Big Bass Bonanza – One of the most popular slots ever, let alone by Pragmatic Play, Big Bass Bonanza offers a fun and simple base game, and an action-loaded free spins round. The RTP is a pleasing 96.71%, and you can get up to 2,100x your stake.
- Legacy of Dead – Legacy of Dead is part of an ancient Egyptian-themed slot series by Play’n GO. The graphics are beautiful, you can get up to 10 free spins, and there is an array of features you can trigger. It is a highly-volatile game suitable for those who dare, and comes with an optional gamble feature that could see you doubling or quadrupling your wins.
- Primate King – This is a game with an exciting theme and an equally exciting protagonist. The primate king (the gorilla) has the ability to smash away lower paying symbols in the Primate Smash bonus, allowing for even bigger wins. The RTP is a bit on the lower side at 95.66%, but that’s offset by the valuable wild upgrade feature.
- Gonzo’s Quest Megaways – This slot takes a classic, Gonzo’s Quest, and upgrades it with the Megaways mechanics. This means that you get all the fun features from the original slot and a mega number of ways to win with the Megaways software. The RTP is 94.66% but you can win great prizes in both the base game and the bonus rounds.
- Sweet Bonanza – Sweet Bonanza has a good RTP of 96.48%, and gives players the chance to win over £2,000,000. It is definitely one of the most modern games with no traditional paylines and the ability to customise the volatility level in the bonus games. This makes it suitable to all players regardless of their bankroll, and with its colourful graphics, it’s hard not to give in to the temptation!
Online Slot Sites Software
We’ve spoken a couple of times in this article about game providers and we wanted to add a little more information about that. The first thing to note is that almost all casinos get their games from 3rd party casino software providers. These companies create the games and then sell off the rights to the casinos.
There are a couple of reasons why casinos do this. The first is that it saves investing in the huge costs that come with game development and the research and development that comes with them.
The second is that it’s one less job to look after. They know they can sign an agreement, often with several developers, and then the games are ready to go within their casino.
This is now a highly competitive marketplace and there is a huge emphasis on improving existing games and coming up with new, exciting titles. It’s big money for the developers, but the rewards are there as well, should they succeed.
Below we’ve listed several of the leading software developers for online slots UK.
Microgaming
Microgaming is probably the biggest slot game provider, both in terms of the number of games on offer and the number of casinos that use its platform. It covers all bases and it is one of few that are used as a standalone software developer, such is the scale of the corporation.
In terms of its best slots, the jackpot games rank among the best, given they are big as you can find in the industry. Mega Moolah leads the line here. Branded games also play a huge role and Microgaming has been able to sign lucrative contracts with the likes of Jurassic Park, Game of Thrones, and Hitman. Some of its games have been so popular they are now their own brands, including Immortal Romance, Thunderstruck, and Avalon.
NetEnt
NetEnt is a Swedish based company that has had to work hard to get to the top of the tree. It’s been the game innovation that’s allowed it to succeed, and with it has created a range of slots that are now iconic.
Two standout games from its ever-increasing back catalogue are that of Gonzo’s Quest and Starburst. The former now figureheads the NetEnt brand, whilst Starburst is recognised as one of the go-to online slots for most bonus spins offers.
Playtech
Another of the big hitters is that of Playtech. Playtech was one of the original casino game developers back in 1999 and has been in since the ground up.
Playtech is one of few providers able to power whole casinos on its own, highlighting the range of games that it offers. There are a plethora of standout titles, including a huge range of branded slots. Some of these include Justice League, The Dark Knight, and Frankie Dettori’s Magic Seven.
Yggdrasil Gaming
Yggdrasil Gaming is one of the many success stories that you hear about within the game software sector. The company was formed back in 2013 but has quickly cemented itself as one of the best in the business.
Yggdrasil doesn’t get the accolades that the bigger brands do, but the quality of games, particularly slots, is second to none. Games such as Vikings Go Wild, Vikings Go Berserk, and Blood Moon Wilds are three of its marquee titles.
Play’n GO
Play’n GO is another Scandinavian brand doing well in the online slots section. Formed in 2007, it has now a wealth of games at its disposal and has been able to put a precedence on making sure that RTP rates are high as they can be.
Standout games from the brand include the likes of Troll Hunters 2, Rich Wilde and the Shield of Athena, and Rally 4 Riches. What’s noticeable about each of these games is that they follow an exciting story as you play, unlocking a max bonus round and features that many of Play’n GO’s competitors don’t have.
IGT
IGT has been able to specialise in themed games, as well as branded slots over the last decade or so. The company splits its work between online and live casinos, creating a huge number of slot machines that you see all over the world in brick-and-mortar casinos.
Online, it has got a massive range of slots to choose from. What’s epic about IGT is that any games that are dated or are no longer up to scratch either get refurbished or ditched. This is rare, but from a user experience perspective, something that is highly welcomed.
Standout games here include the likes of Family Guy, Ghostbuster, Baywatch, Cleopatra, and Wheel of Fortune.
Novomatic
Novomatic may not be the first brand that you think of when it comes to software developers, but it is the oldest in this list, dating back to 1980. The company not only has a great range of online slots but also over 2,000 land-based casinos that are hosting its games.
Games wise, the Book of Ra is what it is best known for, but other games include Lord of the Ocean, Dolphin’s Perl, and Sizzling Hot, each adding to a strong package that’s on offer from Novomatic.
Online Slots Bonuses and Free Spins
One of the most lucrative parts of online casinos is that of the welcome offers that you’re able to access. If we are being honest, a lot of casinos are pretty similar these days, which is down to the sheer volume that there are to choose from.
To differentiate from the crowd and to lure players in, the casino will offer some sort of welcome offer, usually in the form of a welcome bonus or free spins.
The amount you can claim here will depend on the online slot offer that you are eligible for. This may range in terms of the wagering requirement, the amount in your first deposit and how many deposits you want to make.
A key thing to note here is that this is very rarely just free money. A welcome bonus, for example, is bonus money that is initially handed out by the casino, but for you to then withdraw the cash, you need to meet a certain criterion in terms of gameplay. These are commonly known as wagering requirements.
When you’re given the bonus, you will then be told that you need to wager through that bonus a certain number of times before you are eligible to withdraw the money. This can be anywhere between 20x and 50x the bonus amount.
So, if you were given a bonus worth £100 and the casino asked you to wager through that bonus 20x before you can withdraw, you would need to place £2000 worth of wagers (20 x £100) before that cash was technically yours to use as you wish.
You will also find that games will be limited when it comes to wagering. This might mean that only a percentage of every £1 you wager will count towards this clearing rate. However, with online slots, almost all bonuses will be targeted towards these games and they usually come with a 100% contribution.
Other things to look out for include the amount of time you have to clear the bonus before it expires, the games that you can play to clear the said bonus, if the clearance rate is just for the bonus amount or the bonus and deposit amount, and which deposit methods will be eligible to claim the offer.
Free spins are a little more straightforward than most slots bonuses. The casino will give you bonus spins for certain slots and then any winnings you get from this, you can usually keep.
Limitations from this online slot offer generally include things like the maximum stake per spin, the number of spins allowed and the games that you’re able to use your free spins on.
Best No Deposit Slot Sites
The no deposit bonus offer is so good, it had to have a section of its own. A no deposit bonus means that new players are rewarded with extra funds simply for signing up, and just like the name suggests, the player is not required to deposit a wager! The only thing you need to do is find an online slot site that offers a no deposit bonus, sign up and verify your account, and the casino will credit your balance with the bonus money. Just like that!
Naturally, since this kind of offer is so lucrative, it can be very rare to come by. However, we won’t have you scouring the internet to try and find one as we’ve got the best one right here. LeoVegas will give you 10 Free Spins for signing up, without you needing to deposit any of your money. Better yet, the winnings are paid in cash!
Best Slot Sites with Low Wagering Bonus Requirement
The aim of the game for any casino bonus is to find the one with the lowest wagering requirements for their bonus. These are the ones that give the players the most chance of getting money out of the casino within a reasonable timescale.
Before you start looking at independent slot sites, you first need to work out a plausible figure that you’re able to reach in terms of the deposit amount and how much you’re expecting to play. A good timeframe to work on for this is 30 days, given that most offers expire after this time. However, weekly amounts are useful as well, with some casinos giving less than 30 days to clear.
If you are new to online slots, then this is going to be tough to know straight off the bat. It’s for this reason that you need to find the smallest wagering amount over the longest period.
You could argue that this is what you need to look for with each bonus, but sometimes the bigger offers are less user friendly, but still not out of reach.
To plan for this, decide what you want to deposit into your account and then a rough amount that you want to wager each week. Remember, this isn’t just the amount that you will win or lose as games will balance out the more you play.
Once you have a rough idea, it’s time to bonus hunt. Check for the casinos that have a high deposit amount, a long clearance timeframe and a low wagering amount.
What are good numbers, we hear you ask?
Well, any timeframe over 30 days is pretty good for a casino bonus. Any bonus that is a 100% match or better is good value and you can target money worth £100 or more for this.
The amount wagered is a key area to check. Anywhere around the 30x mark is good and anything lower is really good. However, it’s key that you find out if this number includes both your deposit and your bonus, or just one of these. You want to avoid casino bonuses that include both as it’s twice as much money that you need to clear to get your bonus.
Finally, you need to check the games that contribute to clearing the bonus. Most have slots as a 100% contribution, but it’s worth checking, just to make sure.
Play Free Slots Online
Lots of game developers and casinos offer free games that you’re able to play online. They were originally designed to be a “try before you buy” type of deal and it was something that we would recommend most new players utilise.
These types of games or demo play features are still about, but it’s worth noting that players from the UK won’t be able to access them. The reason is that they’ve been banned by the UK Gambling Commission who’s deemed they are too accessible for problem gamblers.
As a result, UK players no longer have access to these free slots online. It’s worth noting that if you are from the UK and you do get access to them then you need to be questioning the integrity of the casino and that they will be going against regulations from their licensee to do this.
Those of you outside of the UK will still be able to continue playing slots for free. We also still recommend that if you can get access, to use them and learn how a certain slot game will work in terms of pay lines and bonus offer features.
Mobile Slot Sites
As life gets busier, more and more people are turning to their mobile phones instead of their desktops. Online casinos and game software developers know this, so most games are now developed with a mobile-first strategy in mind. This means that the games are actually designed to fit and be played on your phone, and then adapted to online, instead of the other way around. We will even dare to say that some of the best mobile casino sites in the UK are even better on mobile than on the desktop version.
Most slots are developed using HTML 5 coding, meaning that the game can be accessed on a multitude of devices including Android, iOS, and Windows. For the most part, the games are able to fit any screen size or resolution. This will allow you to play your favourite slot while you’re going about your day, maybe on your commute, or even a quick cheeky game on your lunch break.
Players can choose to access the slots on their mobile browser, but most of the best mobile slot sites will have their own mobile casino app which can be downloaded through the casino’s website, Play store, or the App Store. What’s more, new UK online slot sites, which are popping up all the time, will all be designed with the mobile-first approach we talked about previously.
| Brand | Total Mobile Slots | Mobile Slot Providers | Visit Site |
|---|---|---|---|
Established 2018 | 1672 | 107 | Visit Site |
| 18+. New players only. min deposit £20. Max bonus £5. Winnings from spins capped at £50. 100 Zee Spins valid on Starburst (first 10 credited immediately upon first deposit; rest credited at 07:00 GMT at 10/days). Spins must be used by 23.59 GMT of the day on which they are credited to player account, any unused shall be removed. Bonus funds must be used within 30 days. Bonus funds are separate to cash funds, and subject to 35x wagering (bonus + cash). Full terms apply. BeGambleAware.org | |||
Established 2018 | 1421 | 100 | Visit Site |
| 18+. New players only. One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£100: max £100 bonus + 150 spins on selected games; £101-£200: max £200 bonus + 100 spins on selected games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins credited as bonus and capped at £100. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute to wagering requirement. Bonus funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org." | |||
Established 2017 | 1386 | 100 | Visit Site |
| 18+. New players only. Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly. BeGambleAware.org | |||
How to Maximise Experience with Online Slots Tournaments
Slots tournaments are a relatively new feature to online casino games, and they are still very much undervalued from within the community. The concept is as the name suggests, a tournament of online slots, rewarding players for being able to play through a set amount of coins in the fastest time.
Even though the concept sounds easy, it’s harder than it looks, which in turn adds a bit of skill to the games. There are also variations in terms of the games, prize pool and timeframe of each of the casino tournament that you can enter.
The number of casinos that are including this game type is growing in the UK. Mr Green is one of the biggest and best. A typical example of how this would work comes in the form of their Reel Thrill Slots Tournaments.
To enter this all you need to do is play on the Reel Thrill games playing any real money slots from within the series. Once in, the game will then take your percentage of profit from your 20 spins and then combine this into a score. Whilst playing you can see the live leader board and the winner after 20 extra spins will be the player with the highest number of points.
The game will reset every 15 minutes and you are free to come and go as you wish. The top 5 places on the leader board will then be eligible for a cash prize, which will be applied straight to their account.
Mr Green isn’t the only casino that’s offering these game types. Others include Unibet, BGO, 32Red, Paddy Power, William Hill, and many more.
The games often differ based on the number of spins that can be made within a certain timeframe or, like the example above, the highest percentage won by an individual player. They use percentages to allow players of all bankrolls to enter here and keep it one level playing field.
Prizes are also going to vary. Some of the bigger tournaments can include things cruises, 5* holidays, gadgets, cars, latest tech, bonuses, cash, and even free spins. You will find they are used to promote new games into the casino and get a bit of buzz created around it.
Best Slot Sites for Winning
If you only look for one stat from an online UK slot, make sure it’s the games payout percentage. This is often referred to in the industry as the RTP (Return to Player).
In layman’s terms, this is the amount of money that is paid out per £1 that is invested. So, if you put £1 into a slot machine with a 97% RTP, then you can expect to get 97p of that £1 back.
As you can imagine, things aren’t as straight-forward as that, and we need to take into consideration variance. This means that events occur that are contrary to the mathematical route.
For example, the odds of flipping a coin are 50% chance for heads and 50% chance for tails. But, the possibility of flipping heads 10 times in a row is very plausible given it’s a low sample size. The more you flip, the more even the results will be, thus reducing the variance for that bet.
Slots work in much the same way. If for every single £1 we entered to the slot we only got back 97p, then no one would ever play. People play for the variance in the hope to win more than they invested.
As a player, we want to be looking to take the highest RTP possible. Most slots only range somewhere between 92% and 98% RTP. The higher the RTP, the more it’s going to give back to the player.
Some online slots allow you to change variables in the game, which in turn affect the RTP for that game. Things like the pay lines and even the stakes can change a game’s RTP. This is a perfectly legal feature.
At Gambling.com, we include the RTP for every slot and progressive slot that we review. This is such an important stat that it’s imperative we do not leave it out and you, as the player, are aware of the style of game you are playing.
Just as a final note on this, the lower RTP games don’t always mean they are poor games. It means they offer a different game style than other slots, which is why so many of them differ.
If you looked at progressive jackpot games, these are commonly around the 93% RTP mark, which is low. However, they are the only games that allow you to win millions of pounds, which is the trade-off that comes with these games. Higher payout casinos are always more preferable to play at when taking into account the huge figures up for grabs.
Best Slot Games – What are They?
Of course, what makes the best slot games is not just the RTP as other factors need to be taken into consideration. One of these is finding games developed by the top software providers. The best online casinos in the UK will carry games from multiple providers and might also have exclusive slots which you will not find at any other casino. The best slot games will also provide players with a thrilling gaming experience, keeping the player involved. This comes in the form of stunning visuals, fun themes, spins, bonus rounds, and other exciting features.
For a perfect example of the best slot games, have a look at our list of the 10 most popular online slot games. All the slots on our list are entertaining, interactive, and give you the chance to win some real money.
UK Slot Sites that Take PayPal
Independent slot sites have come a long way over the last decade or so, and one of the biggest innovations has been the number of ways that you can get your money in, and most importantly, out of the casino.
With PayPal, gone are the days of having to wait sometimes even more than a week to be able to access your winnings. UK slot sites that take PayPal are becoming increasingly popular since PayPal is usually the fastest way to get your money out. Withdrawals can be back into your account as quickly as within 24 hours, and most of the time, you can get your cash immediately if you need to. Another benefit to using PayPal is that it is secure and your payments will remain semi-anonymous since you won’t have to give the casino your banking details. Having said that, you will still need to verify your PayPal account.
There are a series of other payment methods that you can access as well. These include:
- Paysafecard
- Neteller
- Skrill
- Bitcoin
- Apple Pay
- Google Pay
- Revolut Card
- Debit Cards
Best Online Casino Game Sites
Online casino game sites are different from online slot sites because just as the name implies, online slot sites will only offer online slot games. The upside to this is that the game selection is usually much bigger, with more different kinds of slots on offer. Additionally, the bonuses also target slot games, so you might be able to get your hands on free spins and tournaments.
The downside to online slot sites is that you’ll be restricted to playing online slots. If you ever feel like changing it up and trying out something new, an English online casino that carries a range of table games as well as slots is a better option for you. These casinos will typically offer slot games, and traditional casino games such as roulette, blackjack, poker, baccarat, and more. The bonuses and promotions will most often include a matched deposit, the funds from which can then be played on slots or table games.
| Brand | All Games | Slots | Live Games | Avg Min Dep Casino | Visit Site |
|---|---|---|---|---|---|
Established 2003 | 1094 | 1023 | 33 | 10 | Visit Site |
| New Customers only; Min. deposit £15 (no Skrill/Neteller); Wager bonus 40x within 15 days; Max winnings = 10x bonus; Extra spins validity: 7 days; Extra spins max. winnings = £100. Stake contribution as per eligible games; See full terms; Terms apply; 18+ | |||||
Established 2012 | 1293 | 1176 | 44 | 10 | Visit Site |
| Welcome bonus for new players only | Maximum bonus is 100% up to £100 | Min. deposit is £20 | No max cash out | Wagering is 35x bonus | Maximum bet with an active bonus is £5 | Eligibility is restricted for suspected abuse | Cashback is cash with no restrictions | Skrill & Neteller deposits excluded | Cashback applies to deposits where no bonus is included | |||||
Established 2001 | 659 | 640 | 19 | 20 | Visit Site |
| Deposit and stake £10 on eligible Casino games to get a £50 bonus. Wager the bonus 40 times on eligible games to make the bonus balance withdrawable. Time limits, game restrictions and T&Cs apply. | |||||
Best Online Slot Sites UK – The Verdict
Although online slot sites seem to be sprouting every day in the UK, we all know that not all of them deserve our and your time and money. Since it is important for us that you don’t fall for any traps, our Gambling.com team makes sure to only recommend the top online UK slot sites.
By checking out any of the slot sites recommended on this page, you can be sure that you’ll be enjoying the best online slot offers with the best real-money games, all in the safest gambling environment possible.
References
FAQ
Is it easy to learn online slot rules?
All slots will come with dedicated rules that are applied to that game. They should be easy to follow and highlight things like winnings combinations, paylines and multipliers.
What are the best Progressive Jackpot slots?
The biggest progressive jackpots are the likes of Mega Moolah, Major Millions and Arabian Nights. Each consistently has jackpots over £1million and above.
Where do I find the newest slot games?
We have all the latest slots listed as they come out. We also offer a list of new slot sites that you can claim a bonus from when you join.
What is slots RNG, and can it be trusted?
RNG stands for Random Number Generator. This randomly creates an algorithm of which then proceeds the symbols being drawn for that slot. This is a process that is governed and tested by the UK Gambling Commission and is highly trustworthy.
Which slot site offers the best payouts?
There is no single slots site that offers the best payouts. This will depend on the games that you are playing which can span across multiple sites.
Can I win real money on online slots?
Yes, you can win. You will need to have some luck, but it’s very possible to win huge sums of money from online slots.
How to find the best slot games?
The best way is to read our reviews on Gambling.com. Each game is different, and our reviews will be able to highlight the game and online slot site that best suits you.
Can I play free slots online?
Not in the UK, unfortunately. However, this feature is still accessible for a slots player outside of the UK on casinos that have this feature.
How to avoid rigged online slots?
You need to make sure that the casino you are playing on is fully licensed by the UK Gambling Commission. Game safety is one of their highest priorities and as a result, are most definitely not rigged.
Any tips to win at online slots?
Apply bankroll management and target games with a higher RTP.
Can I play all online slots on mobile?
Yes. Almost all online casinos have a mobile version, be it a downloadable app or a mobile version of their online platform.
Where to find a no deposit bonus for slots?
You can find these offers throughout our site at Gambling.com. However, they are rare, so the chance to start with an online casino with bonus funds doesn’t pop up all that often.
Can free spins be used on any slot I wish?
No, free spins are almost always limited to a single game, as highlighted by the casino. Starburst is often a popular one for these types of offers.
How does slot volatility affect my winnings?
Slot volatility reflects the number of times a slot pays out and the multipliers on their wins. A highly volatile slot pays out big, but less often than a lower volatile slot, paying smaller, but more often.
Are the top slots sites licenced in the UK?
Yes, all the top slots are fully licensed and regulated in the UK.
Contributors
Hi, I'm Lee James Gwilliam
"With over 10 years as a poker player and 5 in the casino industry I’m here to share my experience and passion."
- Poker
- Online Slots
- Casino
Reviewer since February 2016
