Best Casino Sites for Playing Online Slots

Online Slots

Of all the online casino games that exist, slots have arguably embraced new technology more than any other! This is why working out which is the best online casino for slots can be very tricky. However, our team love a challenge! We also love slots and we bring this passion to help you find the ideal fruit machine site.

It doesn’t matter if you are a total newbie to online slots or a seasoned veteran, our slot articles will guide you through everything you need to know to enjoy the best online slots experience. Countless hours of playing the top UK sites give us the confidence to recommend our favourite 10 online casinos where you can play.

The Best 10 Real Money Slot Sites in the UK

As the majority of casino sites count slots as a 100% towards the wagering requirements, many players love to play them to clear any outstanding requirements. We compare sites based on what is important to you, the player. Bonus amounts, wagering requirements, types of payment methods, game selection, ability to test games before you play for real money (Tip: has a great selection of all popular online slots) are just a few of the things we look for when comparing real money slot sites. At the end we came to the conclusion that these are the best slot sites in the UK:

Enjoy the high adrenaline experience of online fruit machines. In the following video we present our countdown of the top 5 casinos that bring the best slot action direct to your computer, tablet or mobile phone.

The Top Rated Slot Bonuses and Promotions

Although there are not many initial welcome bonuses that are specific to slot players, as mentioned before a huge advantage that slot fans have over other casino players is that almost all slots count 100% to the casinos wagering requirement. Percentages for other games such as roulette can count as little as 5% and in some cases not contribute at all. When you also consider that the RTP (return to player) percentage in your local pub or club is normally around 75%, online casinos that offer slots look even more attractive, as there the average RTP is over 90% which makes for a massive difference.

Our top choice for generous slot offers has to go to Betfair, Betfair has not just one great offer for fruit machine lovers but two! Firstly they offer £5 for new casino customers to try out their fantastic range of online games. When you are ready to sign up and deposit they offer a huge 200% match up bonus up to the value of £1000. You can read our great in-depth review of Betfair by clicking here.

Where to Play Online Slots with No Deposit?

Whilst Betfair gets the nod for their excellent exclusive slots matched deposit, 888 Casino should also stand up and take a bow for their great £88 free offer. When you register an account with 888 Casino they give you £88 no deposit to play a selection of games. When you are ready to deposit they also offer a not too shabby ‘up to £100′ matched first deposit bonus. Although any winnings from the no-deposit offer are capped at £15, this does not apply if you win the jackpot on Millionaire Genie! So without risking a single penny of your own money, you have the chance to win a fantastic, life-changing amount of money.

Another thing we really love about 888 Casino is that you will find games that are unique and totally exclusive to 888 Casino. When you spend as much time as we do researching different games at casinos then it is a refreshing change to see different games that are not available anywhere else. So for variety as well as offering a risk-free trial, we highly recommend 888 Casino.

Play Online Slots for Fun to Find Your Favourite

Whether you are new to online slots or not, the huge selection available may seem a bit daunting at first. This is where ‘freeplay’ or ‘play for fun’ mode is a great help. Almost all of the top UK online casinos allow you to try many of the games for free. This does really help you find a perfect match as not all slots are made the same.

Some people love having fewer wins but when they do win they like their wins to be bigger, this type of slot can dent your bankroll very quickly but the rewards are also very high. Other people like regular small wins or features that ensure they keep playing and the bankroll requirements for this type of slot tend to be smaller.

Below we have selected the best free to play slot to help you get to a good start. As they are in freeplay mode the currency is virtual and you are not required to deposit. If at any time you wish to play for real money then you will find an option to play real cash slots within the game. If you, on the other hand, want to learn more about the game before you try it, then make sure to also check out our detailed review of 888’s Millionaire Genie slot.

Frequently Asked Player Questions

How can I be sure that the slots are fair and safe when I play at an online casino?

All the slots listed on our site are absolutely safe and you can be assured that all the companies we recommend are both fully licensed and regulated with the Gambling Commission within the UK. All the companies we feature are also subject to external testing companies such as Technical Systems Testing (TSTGlobal) and eCOGRA. These companies are independent to the casino operators and test that the random number generator used is indeed random and totally fair. You can view the extensive criteria that TST use by clicking here. All online slot casinos we feature accept totally safe deposit methods such as Visa and Mastercard. Many also accept e-wallet services such as Ukash, Neteller, PayPal, Skrill plus many others.

What are the best online slots to play in the UK?

This really is down to personal preference but the best operators have slots to suit all audiences. As featured on our page the most popular slots at the moment are the progressive slots, because they are on a network the prize money can be a life changing amount. Although the game features tend to pay less than non networked games, the excitement of potentially winning millions makes up for this.

Video slots are also immensely popular and make up a large majority of the slots you will find at online casinos. Many of the bonus rounds play just like a video game and make the slot really immersive and provide hours of fun.

3D slots are very popular and are among the most played slots and although very similar to video slots but the reels have a pseudo 3d effect to add depth. These slots create a feel of realism and are fun and engaging to play.

3 Reel Slots are the traditional looking fruit machine type games. These types of slots have less interactive features and are idea for more traditional slot players and for slot fans who want a simple but engaging experience.

5 Reel Slots: Back in the beginning of slot machines most of them had 3 reels. With the advancement of computing technology, game designers could make more sophisticated games with 20 and more pay-lines. 5 reel machines are pretty much the standard in video slots.

Classic SlotsClassic slots are a blast from the past with their old school symbols and 3 reels. Traditionalist will feel right at home with these machines. Nostalgic fun without the complications of other, more modern slots.

What is the best online casino for slot machines payout?

Just like a real slot machine that you may find in your local Wetherspoons, online slots pay-out is calculated as return to player (RTP). An RTP figure shows the odds of winning a prize from playing the game. It is not calculated on an individual spin but rather over a large and significant number of game plays. For example, if an online slot shows 90% then you wouldn’t expect to receive back 90p for every £1 put in but over a long duration of say 100,000 plays the machine would average 90% payout.

When looking for the top internet fruit machines that offer the best return to player, it is not as easy as it is with a static slot. On the fruit machines you find in pubs and clubs the minimum % payout has to be displayed by law. With online casinos offering slots, the information is displayed on the website but it’s not always easy to find. The great news however is that online slots tend to offer a much higher RTP than fruit machines in pubs, clubs and casinos.

Our recommendation is to open a few accounts with different casinos, this way you can take advantage of any special welcome promotions which will increase your bankroll and give you longer to play. You can also search the website of casino operators to find the last audited RTP for a slot you like.

Should I play ‘Instant Play’ or download software?

When the first online casinos were created, almost all the casinos required that you download the client software. This enabled better graphics as the internet speeds and structure was not adequate enough to provide the bandwidth required to play. However things have changed dramatically over the last couple of years and online casino operators have been quick to take advantage of this by introducing ‘instant play’ games that run in the browser. Many of the instant play games are identical to the download versions of the games but with the added advantage that you don’t need to download the client software. Many of the online slot casino games use HTML5 technology to enable the games to be played ‘on the go’ so the games will look the same, no matter what phone, tablet or pc you use.

It is worth pointing out that some game providers still require a software download to enable you to play the full range of titles that they provide but this is becoming less common. The download software for all our recommendations is fully tested against viruses and malicious software so you can install with confidence.

What are the top online slot games for free?

Many of the top game producers such as Playtech, Netent and Microgaming among others allow many of their games to be played in free-play or free mode. This is a great way to test out a game and get used to its features before you invest any cash. Most of our sites give you the chance to play the games for free before you play online slots for real money.

What is the difference between RTP (return to player) and Variance?

If you have visited many casino sites the chances are you have encountered these terms. Without going into too much detail, let’s summarise the difference.

100% minus the return to player can be considered the ‘house edge’. Bigger house edge percentage equals bigger profit. So if a slot machine has a 95% return to player, the theoretical profit made is 5%.

Variance: Imagine if you created a graph with every spin you played on a slot. The vast majority of time you would mark 0 as you didn’t win. If you marked when you won the difference between the highs and lows is the variance.

Low variance slots equals good playtime, bankroll should last a while, relatively low risk, but hard to win big (can also be described as low risk, low reward potential).

High variance slots equals far bigger wins to be had, but at the cost of far greater risk of quick bust outs with very little playtime (can also be described as high risk, high reward potential).

Is it legal to play on real money online slots?

In December 2014 the law was changed in the UK with regards to online gambling, a new point of consumption tax was introduced that would mean that any company that offers gambling services to UK residents would be liable to pay a 15% levy. Before this law change, gambling operations would be based in countries with lower tax demands and be regulated by that country. This law change means the UK gambling commission is responsible for licensing and regulating the companies no matter where they are based if they accept UK players. So in effect, many companies will be subject to dual regulation. One can only imagine that this will be beneficial to the UK customer. It is totally legal to play real money online slots.