Best Slots Sites Online

Trying to find the best slot sites can be somewhat of a challenge in today’s marketplace, however, here at, we have got you covered because our experts possess decades of industry experience between them and understand what makes the top slots sites.

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Last Updated on by James King

This means that we only list the most reputable and the top UK slots sites for our readers and subsequently make sure that each one is licensed by the UK Gambling Commission. There are also many factors that we take into account when analysing an online slot site and understand that players do not necessarily value all of the same ones. That is why all of the information that we provide is first and foremost balanced, objective and well-reasoned. As a result, we believe fairness is upheld in this way.

In this guide, we have compiled a number of elements that we believe are important in our decision making process for choosing the best slot sites.

Casinos With Highest Slot Payouts

Without a doubt, this is one factor that we have realised players rank highly on their list of priorities when it comes to looking for the top slot websites. While customers get a substantial amount of entertainment from playing online slots, the main reason that they participate is to try and win as much as they can.

As a result, there are a number of variables which help to contribute towards the highest slot payouts, such as RTP (Return-to-Player), slot variance and slot volatility. Typically, when choosing slots that have a higher RTP, at least over 96 percent, this invariably means that you can be positive that a substantial percentage of real money that you wager will be returned to you. This though is usually over a certain amount of time.

What you will often find is that the best slot sites have a variety of different slots with differing RTP percentages and from a wide variety of software providers. As a result, this means that you can be sure of a combination of quality and value across the board.

What to Consider When Choosing the Best Online Slots Sites UK

There are many different things to think about when making a decision regarding which slots websites to sign up to. As a result, our reviews go into an extensive amount of detail and cover so many different factors. Let’s take a look at what we believe you should weigh up before making your decision, though we do understand that it may ultimately come down to personal taste.

Appearance & Theme: This can count for a lot because the aesthetics of a site often relate to the brand itself, such as the colour scheme, graphics and images. Many people underestimate how important this element is, especially in the online gambling industry because it can lead to countless conversions and new customers. Some operators base their entire brand on the appearance of their site, because they know that this will appeal to a certain demographic. For example, there are sites which are based around aliens and space to encourage sign-ups from science fiction fans who also may be fans of gambling.

Welcome Bonus: These are often one of the biggest selling points for an operator and while many sites compete with each other to try and offer the most attractive signup offers and as a result change them every couple of months, there are others who focus on consistency. What this means, is that they will decide on one and stick with it so that players do not become disillusioned. Sometimes, in order to provide choice, sites will have more than one welcome offer all with their own benefits, while they may also have wagering requirements attached. This means that new players have to wager 10 or 20 times their initial deposit before their bonus is unlocked.

Promotions: Some sites will also have ongoing promotions that their customers can get involved with and in many cases, this helps with branding. In addition, there may also be different themed promotions, such as one every day or promotions surrounding new slot games as and when they are released. The reason why promotions are popular with the best UK slot sites is that they form part of the wider strategy particularly in relation to customer retention.

Software Providers: The best UK slots sites work with a wide variety of the industry’s best software developers who provide them with the top UK slots and games. Such developers include top names like Microgaming, NetEnt and Playtech as well as an array of more boutique companies like Elk Studios and Yggdrasil Gaming. Also, there are sites which only work with one provider and as such only offer games which are developed by this company. Generally speaking though, these are usually not as popular, because customers like to play games from a range of different software providers.

Slots and Games: Understandably, this is one factor that contributes towards the success of an operator. The best slot sites are usually defined by the quality of their slots and games, while the quantity also comes into play as well. Sites which offer a variety of different themed slots (such as being based on Ancient Greece/Egypt, blockbuster movies as well as traditional classics like Starburst), are usually the most popular. Casino table games also play a part, which is why good slot sites have a choice of blackjack, roulette, baccarat and poker.

Progressive Jackpot Slots: Some of the best slot casino sites provide players with an attractive number of these and they have become some of the most attractive products in the industry. This is because players have the chance to win up to millions in prize funds, knowing that it could be won randomly at any time. These slots are created and offered courtesy of a combination of software developers.

Live Casino: Sites which offer this are also just as popular. Over the last decade (especially since 2010), this has grown significantly in popularity because players want the genuine casino experience with a live dealer, from the comfort of their own surroundings. As a result, the best online casinos which offer this, work hard to make sure that this service meets their customer’s expectations.

VIP/Loyalty Scheme: Arguably the best online slot sites have the most appealing loyalty or VIP schemes for their players and these will usually work in tiers. What this typically means is that the more funds that you deposit, the more benefits that you will receive in the form of bonus cash, entry into exclusive tournaments and access to slots which would not be available to non-VIP players.

Payment Methods: This has become an important factor in the industry over the last few years, because sites have realised that players want more deposit and withdrawal options. Particularly popular has been the development of online payment gateways such as Neteller and Skrill which have made transactions faster and even more secure. While all operator sites have the SSL encryption technology to keep customer’s details safe, online payment gateways typically add another layer of protection. In addition, many also offer more advanced deposit methods such as Paybyphone and Paysafecard.

Mobile Functionality: With many players now preferring to use their smartphones (or tablets) for their online gambling experience, mobile has become more important than ever in the industry. In fact, operators prioritise their mobile sites over desktop because they know that the highest proportion of users will be gambling with their handsets so they make sure that the functionality and navigation are as good as it can be. Developed to the highest standards, often by the best software providers, some even have their own apps that can be downloaded that are compatible with both iOS and Android devices.

Customer Support: Many operator sites have some of the best trained customer service representatives available for players. The most popular and arguably most effective form of customer support is Live Chat, which in some cases works over 24 hours/day, while there is also an email address, phone number and a comprehensive FAQ section for customers who prefer to use this method.

Why play slots online?

There are a wide range of benefits to playing slots online, especially compared to a land-based casino. Let’s take a look at some of the reasons why customers opt to do this and how they can make the most of this experience.

Convenience: Being able to play from anywhere via a tablet or smartphone is arguably the biggest selling point for gamblers, because instead of going to an actual casino they have immediate access. One of the most important factors for a UK slots site is to make sure that they can deliver an immersive experience for the customer, while still being easily accessible and it is fair to suggest that the vast majority do this.

Range of Slots: While land-based casinos do have a wide variety of slots for their customers to play, only one can play at a time. The best slot sites meanwhile have hundreds of titles available that cater to thousands of players simultaneously. All of the most revered casino slot sites provide their customers with slots which have all been hand-picked with a lot of market research, because they know what their target audience appreciates.

Bigger Prizes: It is often the case that when you play online, there are much bigger prizes available for the customers, especially if the site is owned by one of the household names in the industry. This is because they have huge revenues which means that they can offer big jackpot prizes and subsequently, their sites attract more players.

Quick Registrations: The best slot sites pride themselves on ensuring that a new customer can sign up with ease, while still covering all of their bases with regards to responsible gambling. In some cases, this is by offering sign up bonuses which don’t require players to make a deposit, although it is more common that the new player needs to make a min deposit and wager a certain number of times to unlock their bonus funds. A lot of time and effort goes into making sure that new players don’t have to click more times than they have to in order to complete their sign up process, as they are aware that users want to get this over and done with as soon as they can.

Aesthetically Pleasing: Online slot websites are focused on ensuring that their sites are attractive to the customer and as a result the most visually appealing often get more registrations. A lot of investment is put into graphics and a great deal of research goes into making sure that the branding of the websites is on point.

How to play at online slots

The very first thing that you need to do before you can play at an online site is to find the one which appeals to you. This might be for a variety of reasons, such as the signup offer or the quality of slots that are on offer.

Once you have found a site that meets your expectations, you can then follow the registration process and while each one might differ in terms of the steps that players need to take and how long this might last, there are still mandatory elements which are involved such as the opportunity for players to opt-out.

Following your registration (and deposit if you have signed up to an offer), you are then able to start your online gambling experience at the site that you joined. As a result, depending on where you have signed up, there will be plenty of slots and games available for you to enjoy, while these will also allow you to use them via a demo mode if you are not comfortable gambling immediately until you become familiar with these.

Some sites may even allow you to enter tournaments which they may have on a weekly or even daily basis where you can win big prizes and play against a lot of other users.

How You Can Maximise Your Online Slot Site Experience

Many of the best slot sites offer customers a wide selection of features that they can enjoy, first and foremost by having a range of titles from many highly regarded developers in the industry. As a result, it is worth trying out each of the different ones that are available so that you can get a feel for what you might like, though one way of doing this before you commit any funds is to try this on demo mode.  The most well respected slot games sites allow their customers to do this and it means that you can find out which ones you like and understand how to play them.

Furthermore, a number of the best online UK slots operators have a good range of casino games such as blackjack, roulette, baccarat and poker for their users to enjoy and this considerably adds to the overall experience. Including this aspect to a UK slot site helps to set it apart from others who just have slots and as a result, it means that players get a more authentic experience.

In addition, another way to enhance your gameplay is to make the most of tournaments that are on offer, with some having both daily and weekly ones with great prizes that can be won. Some of these even attract a large number of players, especially the top UK slot sites meaning that you can test your skill against a greater volume of people.

The different types of slot machines

There are a number of different kinds of slot machines that players can choose from and these can be categorised in quite a few ways. This includes technical elements such as RTP (Return-To-Player), slot variance and slot volatility. Also, they can be differentiated by the number of paylines and reels that they may have. However, possibly the most common way is by the different types of slots that they are, which relates more to functionality.

As such, players might more enjoy the traditional, classical slots which have been around for a couple of decades, while others might have a preference for themed slots based on historical periods such as Ancient Greece or Ancient Egypt. On the other hand, customers may have an affinity for the ever increasingly popular movie and TV series themed slot titles.

Then again, players may be attracted by those slots which have the most bonus rounds where they are awarded spins that enable them to be in with a chance of winning considerable sized bonuses.

Possibly one of the most popular forms of slot, however,  are the progressive titles, where players can win millions at a moment’s notice.

How are the best UK Slots Sites decided?

There is a lot to take into account when trying to decide the best slot sites. The most important thing crucially, is objective impartiality because all players have different tastes.

However, to be able to make this decision our experts here at test every aspect of each site by firstly signing up to see what the registration and deposit process is like. Some operators have a minimum deposit that they require customers to make each time, while for the first deposit, they may be able to go much higher in order to get the max bonus amount. For example, the best slot sites UK listings will have signup offers as much as a 200 percent matched deposit bonus up to £200.

Following this, we try each slot and game so that we can give our honest assessment, scoring them on different variables. These include payout frequency, gameplay elements such as graphics and audio as well as the amount of different bonus rounds that are included in each slot. For table games, because some of the top 10 slot sites UK portals have a wide array, the same process is undertaken which allows us to ascertain how easy it is to win and what the gameplay is like and whether there is a max bet on any of them.

In the online casino industry, another important element that players value is having a selection of payment options, especially with the number of that are now available. As a result, in order to give our honest assessment, we deposit and withdraw using as many methods that we can on each of the sites that we review and all good UK online slot sites have these on offer. While it is not possible to use credit card as a payment method, the best slots sites UK listings provide enough options for their players. Let’s take a closer look at which ones are typically available.

Debit Card: All online slots UK operators typically offer players the chance to deposit via debit card, either Visa, Maestro or Mastercard with most major banks on board.

PayPal: This is one of the most popular online payment gateways and also arguably the easiest to use. All you need to do is register your email to set up an account with a username and password, before linking your bank card to your PayPal. You can make deposits and withdrawals quickly and easily this way.

Neteller: Another online payment gateway that has a number of fans this method is similar to PayPal, though not as popular. Again, simply register using your email and set up a password, before linking your desired bank account.

Skrill: While not all top online slots UK operators have Skrill, it still does appear as an option on some of the top 10 slots sites. The signup method is literally the same as Neteller.

ecoPayz: A secure online payment service, this is now available with most of the best slots UK sites, however, there is more of a signup process than the others with more fields needed to be filled in.

Paysafecard: A unique way of making deposits, this is where you can purchase one of these from all registered online and physical stores. You are given a three-digit pin which you are prompted to enter when you choose this as a deposit method on your chosen operator site and your balance is automatically credited with the amount that you purchased it for. Even the best slots website also has this as a payment method.

PayByPhone: Some newer sites also allow you to deposit using your phone, by leveraging industry technology such as Boku. This is particularly convenient if you are in the middle of playing a slot and you want to quickly make a deposit.


While we have endeavoured to cover all of the points, we understand that there still may be things that there is a chance that we have missed. As such, we have attempted to answer these as succinctly as possible below.

What is the best online slot site?
There isn’t necessarily a right or wrong answer to this question, because everyone has their own interpretation of what makes the best slot site. For example, some people might focus more on an attractive signup bonus, while others might have more of a preference for slots and may want to play a certain title or by extension, use slots that have been created by a particular software provider.

Which online slots payout the most?
Again, when it comes to online slot games, there are people who might have a better experience with some slots than others and as a result, base their choice on this. This can be related to technical elements such as the RTP of a slot, because those with a higher percentage statistically payout more often, however, this is typically based on 100 gameplay actions. It is hard to argue though with the fact that progressive slots have the biggest payouts because players are in with the chance of being able to win millions at complete random, however, not all slot sites will offer these.

Which is the best online casino in the UK?
Everyone will have their own preference when it comes to deciding which online casino they like the best. All slot sites in the UK, especially that we list are some of the best ones in the industry and have a vast number of selling points, first and foremost being highly reputable. We only list and review the sites that we think that our target audience and readers will get the most value from and as a result of this, you can be confident that you will find this here at CasinoSites.Org.

Are Slots rigged?
Every site that we list and review is licensed by the UKGC which means that they have to adhere to a certain set of procedures and legislation. For this reason, it means these sites are constantly monitored to make sure that they are employing best practice. Ultimately, slots use an RNG (Random Number Generator) which means that each slot functions at random, though checks are carried out on a regular basis to make sure that everything is all above board.