Online Slots Bonus UK

By Lauri Hannelin. Updated:

Slots sign-up bonus can bring you heaps of extra money to play online slots with. Bojoko brings you all the necessary information about the best slot bonuses in the UK.

On this page, we explain thoroughly what a slot bonus means, how to claim a slots welcome bonus, and what casinos are offering the best slots offers right now!

List of slots bonuses in the UK

Below you can find a complete list of slots bonuses for UK players. Bojoko experts have reviewed all these sites that are offering different kind of slot offers. Use the quick filters or set your own filtering to get exactly those casinos and slots promotions you are looking for!

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  1. 20 bonus spins
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  2. 300%/£40 + 50 bonus spins
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    Number of slots 1080
    Wagering requirements 35x (B)
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    New Players Only 18+. Minimum Deposit: £10. Maximum Offer: 300% Bonus up to £40 & 50 Spins on Book Of Dead. Bonus & Spins winnings must be wagered 35x before withdrawal. Spins expire after 24hrs. Promo Code: 300. Withdrawal & full T&Cs apply. Valid until 31/12/2024. Full and Bonus terms apply.

best slot bonus UK includes various offers

Best slots welcome bonus

The best slots welcome bonus depends on your preferences. However, consider these key factors:

  • Ensure the slots bonus is generous and doesn't limit your winnings or come with high wagering requirements.
  • Look for more than just a basic deposit match slots welcome bonus.
  • Opt for substantial offers like a 200% slots deposit bonus over a standard 100% one.

Here are our top recommendations for the best slots welcome bonuses.

LeoVegas slots welcome bonus

LeoVegas gives you a versatile slots welcome bonus

LeoVegas, the king of the Jungle, gives you a diverse slots welcome bonus to start with. Known as the leading mobile operator, LeoVegas is an all-in-one gambling destination that suits all types of players.

Your adventure begins with the following slots bonus, exclusive to Bojoko's users through the green button below:

The slots welcome bonus is also favourable when it comes to its terms, with reasonable conditions that allow you to benefit from it to the fullest extent.

LeoVegas will definitely offer something new for even the most seasoned players. Have a look at our LeoVegas casino review for more information, or head to the casino and give it a shot.

Play on LeoVegas »


Mr Vegas casino offers a deposit bonus and wager free spins

Mr Vegas was launched in 2020 and has ever since provided its players with a captivating online casino experience. There are over 5,000 games to discover, with a diverse lineup of first-rate game providers to cater to all tastes. 

The Mr Vegas slots welcome bonus is a hidden gem:

The slots deposit bonus is not credited to your account in a traditional manner; instead, you complete the wagering first and receive the funds as real withdrawable funds as you keep playing.  As you play on the site, you will receive the bonus in 10% increments. To put it simply, you are constantly rewarded as you play. 

You can read our Mr Vegas casino review for more information, or you can visit the casino by clicking the green button below.

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All British Casino has a classy first deposit package

All British Casino, one of the most well-known online casinos on the market, is a complete package with an all-around high-quality casino environment. You can't really go wrong with this casino.

Compared to the previously mentioned duo, All British Casino takes a more traditional route with their welcome offer. However, a closer look at the offer reveals the reason why so many UK players have picked the online casino as their go-to site. 

You can benefit from the following slots sign up bonus at All British Casino:

The slots welcome bonus complements the elegant ambience of the casino while still giving you a sizable bonus. Furthermore, the offer's terms are excellent. 

If you are looking for the best traditional online slot bonus, this might be the perfect match for you. Take a look at our All British Casino review for the details, or simply launch the casino and get into it.

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How we rate the best slot bonuses

Rating the best slots bonus UK

We rate the best slots bonuses by looking at them from every angle. Bojoko's experts thoroughly assess and compare slots bonuses to provide you with a clear verdict and a simple breakdown.

We consider the following factors when rating slots bonuses:

The best slots welcome bonus would ideally excel in all of these areas. However, you should not overlook the other factors, like game variety, when selecting a casino. Have a look at our casino slot games page to find out what to look for in terms of slots and game providers.

Top UK slots sites

Slots bonuses are a key indicator when looking for slots sites. Nevertheless, evaluating the site as a whole is equally important. At Bojoko, we make this process as easy as possible.

Our slots sites page highlights the overall best slot sites for UK players. You'll find expert insights on what makes them stand out from the rest, including the elements that contribute to our ratings.

Different types of slots offers

Find it all from deposit bonus slots to free spins,

There are various types of slot offers available, each with its own set of perks and benefits. The best slot sites go above and beyond to give their players an unforgettable experience. As a result, a slots welcome bonus may include two or more bonuses, with various types combined to form a complete welcome package.

Slots deposit bonus

A deposit bonus, the most common and traditional offer type, can significantly boost your balance. The concept is simple, the casino matches your deposit with a specified amount of bonus funds, which you can convert into real money by wagering them. 

While the terms and conditions of these offers differ from casino to casino, the best slots deposit bonus has reasonable wagering requirements and limitations. These bonuses are frequently included as part of the slots welcome bonus, with a 100% deposit match bonus being the most common offer. However, as previously stated, some sites go even higher, with multiple casinos on the market offering 200% deposit bonuses.

Free spins

Casinos often combine their deposit bonuses with bonus spins to spice up the offer. While bonus spins require a deposit, free spins are exactly what their name implies: spins that are given to you for free. Casinos provide these bonuses to both new and existing players.

These bonuses give you a chance to test the casino without risking any of your own money. Winnings from these spins are typically credited as bonus funds, which can be converted into withdrawable cash by wagering. 

Our free spins slots page goes into detail about these offers and presents the best casinos offering these types of bonuses. 

No deposit bonuses

A no deposit bonus is one of the most sought-after bonus types, and it's easy to see why. You get the opportunity to try a casino without making a deposit while still having the chance to win money in the process. 

These bonuses can range from bonus funds to free spins, with some casinos offering up to £20 without requiring a deposit. The main difference between no deposit bonus funds and no deposit free spins is that bonus funds can typically be used on several different games, whereas free spins are typically limited to just one. 

If these are the types of slot offers you're looking for, you're in luck. We have listed the latest no deposit casino bonuses UK, for your convenience.

New slots bonus

The online casino industry is highly competitive, with each site trying to win players' loyalty. As a result, these casinos are constantly coming up with more creative ways to reward their players, most notably with substantial new slots bonuses. 

The most recent slots sign up bonuses typically have a low minimum deposit requirement, allowing you to benefit from them without risking a larger sum. If you're looking for the most recent slots welcome bonus, look no further. The full library can be found from our new slot sites UK page.

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Terms and conditions for slot bonuses

A slots bonus, no matter what type it is, will come with some terms and conditions you must know before accepting the offer. While some bonuses have almost no limitations, others may ruin the entire bonus and render it useless to the player.

These terms vary significantly from one casino to another, but there are some fundamentals that you should check before choosing your online slots bonus.

The wagering requirement tells you how many times you must match the value of the bonus offer before you can receive it in real money, and is generally the most important aspect of bonus terms. A strict wagering requirement can make it impossible to convert your bonus into withdrawable funds, while a lax requirement can work in the player's favour.

A bonus is considered to have a higher-than-average requirement if the wagering requirement is greater than 35 times the bonus amount. Our wagering requirements explained page features a wagering calculator which you can use if you want to double-check any details of your slot bonus.

The 35x wagering requirement is considered the industry gold standard.

The slots bonus may also be subject to various restrictions. For instance, no deposit bonuses frequently have a maximum winnings cap that sets a limit on the amount you can withdraw, regardless of how much you've won. Or if your bonus is sticky, you can't withdraw the original bonus sum. A non sticky bonus is better in this case.

Other restrictions include game weightings and prohibitions, which are essentially there to disqualify and limit the amount certain games can contribute to the wagering. Casinos usually notify you if a game you're playing isn't contributing to your wagering, but it's always a good idea to check the terms ahead of time if you plan to play a specific game.

Finally, before you activate the slots bonus, you should be familiar with its fundamentals. What is the minimum deposit accepted, how long do you have to claim the bonus and complete the wagering, and how much can you withdraw? You can learn more about these core details on our UK casino bonus page.

Types of slots to play with bonuses

While you can usually use your bonus to play the majority of slots, there are some games that you should prefer over others. First and foremost, the game must have a 100% wagering contribution. Live casino games often do not contribute at all, or contribute only a small percentage, such as 5%, making them a poor choice for a slot bonus.

Because the goal is to meet the wagering requirement, it's best to choose a low variance slot. These games do not have as high a single win potential, but they pay out winnings frequently. As a result, your balance is more likely to remain constant or increase when compared to a high volatility slot, which could drain your balance in minutes.

Another factor to consider is the game's RTP (return to player). The best RTP slots can return up to 99% to their players over time, so these games are naturally better suited for wagering bonuses as well.

These are some of the best types of slots to play with bonuses:

Blood Suckers by NetEnt

Blood Suckers is a great game for best bonus slots

Blood Suckers, a true NetEnt classic, is the ideal match for those looking for the best bonus slots. The 25-pay line, vampire-themed slot constantly rewards you with in-game bonus features, wilds, and tasty wins.

The game has two bonus features: a more frequent Burial Chamber bonus and a Vampire Bride free spins feature with the potential for big wins. In addition to its low volatility, the slot boasts a huge 98% RTP, making it one of the highest-paying NetEnt slots.

If you like a spooky atmosphere or simply want the best game to complete your wagering with, this is the one for you.

Esqueleto Explosivo by Thunderkick

Esqueleto Explosivo is a fun bonus slot

Esqueleto Explosivo is themed around the Mexican Day of the Dead. There are five main symbols, which are represented by colourful skulls that sing a Mexican celebratory song each time you land a win. 

This low variance title has 5 reels and 17 pay lines, as well as action-packed features such as Mucho Multipliers, cascading wins, and a massive RTP of 97.60%. As a result, it's an ideal bonus slot for anyone trying to complete their wagering requirement.

Fire Joker by Play'n GO

Fire Joker is one of the more fast-paced bonus slots

Looking for a more traditional slot hall experience? Fire Joker is a 3-reel slot that is one of Play'n Go's all-time classics.

This game heats up quickly; land two full reels for a re-spin feature, or win with a full screen of the same symbol to get a chance on the Wheel of Multipliers.

This slot has one of the lowest variances out there, with a fairly high RTP of 96.15% by default. The upbeat music and fast-paced feel of the game make it a great choice to spin your wagering through with.

Games you can't play with slots bonuses

As mentioned before, some games are prohibited when you are playing with a slots bonus. Casinos prohibit the use of certain games for bonus purposes due to their high RTP, which could make the wagering process too easy from the casino's perspective.

These games are listed in the terms of the offer and usually feature completely banned, non-contributing, and partially contributing games. For example, Thunderkick's 1429 Uncharted Seas has a whopping 98.5% RTP, which is so high that most casinos will not let you wager a bonus on it. Some instant and live casino games allow you to place safe bets, which allow you to wager large sums of money while only losing a small percentage of your wager. This is considered bonus abuse, and as a result, these games are on the banned list for slots bonuses.

While the contributing games vary by casino, you usually cannot use your bonus funds to play jackpot slots, live casino games, or table games. Therefore, it's important that you check the list beforehand.

Summary - How to get online slots bonuses

Getting your slots promotions is actually quite simple. The difficult part is finding the right match for yourself, which is why we list and review various casinos and their offers for you.

Find the best slot bonuses from our casino list

1. Find the best slot bonuses from our casino list

At Bojoko, we provide you with the best slots offers at UK-licensed casinos. Browse our selection or filter the results to your own preferences to find the right casino for you..

Read the expert reviews

2. Read the expert reviews

After choosing your preferred casino, you can take a look at our expert reviews to get further insights about the slots bonus. Our experience will tell you what to expect from the bonus..

Go to the casino

3. Go to the casino

Every review page has a green ‘PLAY HERE' button that will take you straight to the casino. It will also activate any special bonus offers we might have for that particular casino.

Register and claim your bonus

4. Register and claim your bonus

When you get to the casino, register an account by filling out the required details. Deposit and claim your bonus. Remember to check if the bonus requires a bonus code.

Find Slots Bonuses

Alternative bonus options

Using bonuses to play slots is the most common way of doing things on online casinos, but it's not the only way. You can enjoy other games as well with bonus funds.

Casino bonus

A general casino bonus offers a versatile way to enhance your gaming experience across various games.

These bonuses are not restricted to specific game types like slots or table games, making them perfect for players who enjoy a bit of everything.

With a general casino bonus, you have the freedom to explore the entire spectrum of the casino's offerings, from the latest slot releases to classic table games. Discover the best casino bonuses to find your match!

Roulette bonus

Roulette bonuses are a great way of getting more out of your table game session.

Roulette is a classic, no doubt about that. When people think of casino gambling, roulette is often the first thing that comes to mind.

Bonuses for roulette are not that common, which is why we have gathered the best offers in one place.

Check out our roulette bonuses page to see more.

Blackjack bonus

Blackjack bonuses can help you get started.

Blackjack is one of the most strategic table games, which is why it is so popular. A bonus is a good way to boost your bankroll and help you practice the different strategies.

Take a look at our blackjack bonuses page for the best offers.

No wagering bonus

No wagering bonus lets you keep what you win right away.

Bonus wagering has been a part of casino bonuses forever and is something we come to expect. But that's not the case with these bonuses. There are bonuses available that pay all their winnings in cash.

You can find the best no wagering bonuses right here on Bojoko.

Reload bonuses

What happens when you've already taken your welcome offer? That is when reload bonuses start to kick in.

These are bonus offers that are given to you after you have already started playing and depositing. A good reload bonus will be a repeatable perk.

Here, you can find all the best casino reload offers.


A slot bonus is something that a casino can give to its players as a way of rewarding them. You can get these bonuses when you sign up for a new casino or simply by playing at a site that rewards its loyal players.

To find the best slots bonuses in the UK, browse our list of slot bonus casinos and further compare them by reading our reviews and using our filtering tools.

There are various types of slots bonuses, such as deposit bonuses, free spins, and wager-free bonuses. The most common and popular type of offer is a slots deposit bonus, which is usually the first deposit bonus at casinos.

The best slot sites with welcome bonuses vary depending on who asks the question. It depends on what you would expect from a bonus to make it the best. Compare your options and select the one that best suits your preferences.

About the author

Lauri Hannelin

Article by:

Lauri Hannelin

Lauri, a passionate casino enthusiast, embarked on his journey in the gambling industry in 2019. His career has spanned various facets of the iGaming world, from technical and commercial roles to innovative positions in online casino and sports betting companies. This diverse experience has not only deepened his understanding of the industry but also shaped him into an all-around expert in online casinos.

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