Top 22 UK Slots Bonuses in 2021 → [Definitive List]


Slot machines are among the most popular types of games in the United Kingdom’s gambling industry, with more players interested in them than ever. They attract gamers thanks to their appealing designs, unique features, and even classic layouts that remind players of the ones in land-based casinos. Playing slot machines online, however, comes with an extra perk – slot bonuses. Find out everything about how an online slots bonus works, which ones are the best, and how to get them!

What are online slots and how to pick the best one

Online slots are the online version of slot machines found in brick-and-mortar casinos. They have spinning reels covered in symbols and from 1 payline all the way to 3125 ways to win per spin. The reels number can also vary from 3 to 7, and some even have unique features that unlock more reels.

In July 2020, a total of 1,140,743 slot machines existed in the world, and their number is only increasing. They come with various designs and themes that cater to all types of players, from the most classic and traditional ones to modern and innovative kinds.

How to choose the perfect slot machine

how to choose the perfect slot machine

With so many options at hand, it may be challenging to decide which one is better. The most important thing that matters when making your choice is, of course, your preference. Start by determining what type of game you would like to play and if you would like a classic or a modern-looking one. Once that is out of the way, here is what you should pay attention to:

  • Special features – these are a lot of fun and can keep you entertained for a long time, so make sure your chosen slot machine comes with at least one of these;
  • Bet limits – depending on your playing style, check the minimum and maximum bet you can make in the game. If you are a high roller, look for one that allows a bigger bet, and if you are just starting, check out the lowest sum you can wager;
  • Jackpots – some slot machines come with either fixed or progressive jackpots, while some come with none. The jackpot can be won on any spin, regardless if you have landed a winning combination or not. If you would like that, go for games that offer such jackpots;
  • Gamble feature – this is a classic feature that has been around for a long time. It allows you to gamble the winnings you have obtained from a combination of symbols and either double it or lose it. It is an excellent feature to have, even if you are not going to use it every time;
  • RTP – Return to Player is a figure that shows what percentage of the wagered money is returned to the player over a long period of time. Games with a higher RTP will, in time, give back more money than those with a lower RTP. Therefore, it is always good to choose one with a higher percentage.

Be aware: A slot machine’s RTP does not apply to every spin. It is calculated over tens or hundreds of thousands of spins. Therefore, a 99% RTP does not mean you will get back £99 out of £100. You can make more than that or lose it all!

Important: Progressive Jackpot slots are high volatility games. This means that, over a period of time, they give out fewer but bigger wins. Their counterparts are low volatility slots, which involve a lower risk by giving out smaller wins over time.

What is an online slot bonus and how to claim it

An online slot bonus is a type of promotion created by casinos that can only be used in slot machines. Casinos have three types of such deals:

  1. Usable on any slot machine on the platform;
  2. Usable on a series of slots or the slots created by a specific software provider;
  3. Usable on one slot machine only or one of two choices.

These are great, as they allow players to either discover new slots from the platform, discover a new software provider or enjoy the products of their favourite one, or play the newly launched or most popular slots.

Slots bonuses can consist of money, extra rounds, or both, and they come in different forms such as:

  • No deposit deals;
  • First deposit bonus;
  • Welcome package;
  • Temporary or recurring promotions;
  • Deals received from a VIP program or tournament.

New players will often start with the no deposit deals and move on to deposit bonus slots or a welcome package that extends over two or more deposits. The existing players of a platform can enjoy promotions such as the temporary or recurring ones and the ones they get from being part of the VIP program or participating in a tournament.

Quick guide on how to claim a slots bonus

Quick guide on how to claim a slots bonus

The only difference between a slots bonus and other types of bonuses being the game type limitation, the claiming process remains the same. Follow these simple steps to get any promotion from this page:

  1. Register an account with the online casino;
  2. If the promotion comes with a code, use it either when registering or when making a deposit;
  3. Check the list of games that are excluded from the promotion and pick any other slot machine available on the website or, if the bonus only works on a specific game, open it and start playing!

Tips: If you prefer to have more options to use your bonus on, pick promotions that are not tied to a single game!

Be aware: Pay attention to the promotion’s code and read the instructions on how to use it! You can type the code in either during registration or during payment if the promotion is credited upon deposit. Make sure you write the code exactly as it is displayed, or copy and paste it into the respective text box!

Important: If you perform the KYC right after registration, the cashing out process will be a lot quicker after using the promotion.

Types of slot bonuses you can find here

On this page, you will find a variety of promotions hand-picked by our gaming experts. They are designed for new players, and they include no deposit deals, extra spins, first deposit bonuses, and welcome packages.

Each bonus comes with a full description containing information about the platform that offers it, what the bonus consists of, how to claim it, and some highlights from the Bonus Rules and Terms and Conditions.

By clicking on the Details button on each offer, you gain even more insight into the promotions. We will present you with information such as:

  1. The software providers available and on which games’ you can use the promotion;
  2. The payment methods you can use to claim the bonus;
  3. All the game types the offer can be used on;
  4. Date from which the promotion becomes available and date on which it expires;
  5. The minimum deposit required for the deal.

For a smoother navigation and to save you more time, we put at your disposal filters at the top of the page. With their help, you can sort the bonuses to quickly find what you are looking for in categories like:

  • New casino – here, you will find slot bonuses from new casinos in the industry;
  • Lastest added – use it to browse newly added promotions every day;
  • No deposit – only shows promotions that are credited right after registration, with no need to make a payment;
  • No wagering – shows only bonuses that have no wagering requirements;
  • Cashback – displays cashback bonuses that can be used on slot machines.

Also, check out our collection of best welcome bonus slots for more promotions created especially for new players. They come with both spins and money so that they may be the perfect match to a great slot machine.

Important: Always read the Terms and Conditions and Bonus Rules yourself as well! Casinos may change them as they please, at any moment. We do our best to keep every offer up to date, but modifications can appear at any time, and it is better to check before claiming a deal!

Top slot machine software providers in the United Kingdom

#Software ProviderNumber of gamesYear LaunchedMost popular slots
1MicrogamingOver 1,5001994Mega Moolah, Immortal Romance, Break Da Bank
2NetEntOver 2001996Twin Spin, Gonzo’s Quest, Mega Fortune, Starburst
3PlaytechOver 6001999Desert Treasure, Top Gun, American Dad, Nostradamus
4International Game Technology (IGT)Over 1501981Wheel of Fortune, Da Vinci Diamonds, Cleopatra Slots
5BetsoftOver 1301999A Night in Paris, Good Girl Bad Girl

These are the top 5 major players in the United Kingdom online gambling industry regarding software development. They create a variety of games, but the majority of them are slot machines. For their games, online casinos often make promotions because they know British players appreciate them.

These are the most prolific software provider in the industry, and almost any gamer has played at least one of their games. If you have not, this table is an excellent place to start, as you will be playing some of the most popular slots in the industry. Their titles come with a multitude of different themes and features. Besides, they launch new products almost every month, so you will not have enough time to get bored of their catalogue.  

The best slot sites in UK

Variety is great, but having too many choices may leave you more confused than satisfied. There are hundreds of slot sites in the UK, and we are here to help you choose the best one for you. To start with, you should know that the platforms presented on our website are thoroughly verified and tested by our team of gaming experts. Therefore, they are all legit, feature-packed, and focused on giving each player a good experience. But here are some suggestions of the best slot sites you might want to check out.

Top 3 NetEnt Casinos

#Casino NameNetEnt SlotsSlots Bonuses Available
1VideoSlots Casino140
3Generation VIP64

NetEnt is one of the industry giants when it comes to slot machines, and it collaborates with many online casinos. In the table above, you may see the top 3 NetEnt slot sites that we recommend for you after extensive research and testing. They offer many slot machines created by this famous software provider and promotions you can use on them.

Aside from these, they also come with multiple features you will be able to enjoy, such as VIP programs or loyalty schemes, many payment options, and some even come with a mobile app.

Top 3 Casinos with slots from many software providers

#Casino NameSoftware ProvidersSlots number
2Temple Nile1051000+
3Jackpot Village1021200+

Here are the top 3 casinos that collaborate with the most software providers in order to put at their customers’ disposal over a thousand slot machines. These are some of the best platforms and are already popular among players, thanks to everything they have to offer.

If you are looking for the latest casinos to try, check out the new slots sites in the UK, and you will find many options there.


Slot machines are only becoming more popular each day, in land-based, but especially online casinos, as players may also benefit from slot bonuses. A core part of gambling, slot machines have to be available on every online casino, but some walk the extra mile and offer their customers products from a multitude of software providers. With new games being launched every month and casinos ready to create promotions for each new slot machine in order to attract players, we can only expect them to gain even more popularity from now on.

References and Methodology

Some of the information used in this article comes from our experts’ observations, as well as market analysis. Additional information comes from the following sources:

See our list of hand-picked slot bonuses

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New casino

♛ Welcome Package: Up to 100 No deposit Spins + up to £300 Bonus + 100 Extra Spins

Bonus Boss is a newly launched casino from InTouch Games and comes with impressive graphics and mobile responsivity.

PRO: Low minimum deposit, fast processing payout time.

CON: Short list of games.

New players can claim a welcome bonus that consists of:

  • Up to 100 registration spins on The Spinfather;
  • 200% up to £100 + 50 spins on 1st deposit on Supernova Crush;
  • 100% up to £200 + 50 spins on 2nd deposit on Coins of Fortune.

The offer comes with a 40x wagering request. The registration spins are available for seven days, and they are capped at £50. The bonus expires in 30 days. Withdrawals of amounts lower than £10 comes with a £3 administrative fee. Players must validate their phone number in order to create a valid account and qualify for this deal. You have no deposit limits, unless you deposit by phone.

New players only. No Deposit: Available via Feature Game. Free spins (18p) locked to The Spinfather. Expires 7 days after registration. Winnings paid as bonus credit (40x WR). Max withdrawal from bonus winnings is £50. Deposit: Min Deposit £10. Deposit Bonuses expire after 30 days. First Deposit: Up to 200% (Max Bonus £100), Up to 50 Free Spins (15p) locked to Supernova Crush. Second Deposit: Up to 100% (Max Bonus £200), Up to 50 Free Spins (20p) locked to Coins of Fortune. Winnings paid as bonus credit (40x WR). Withdrawing qualifying deposit excludes player from promotion., 18+ T&C's Apply

♛ 500 No Wagering Spins as First Deposit Bonus

Players that decide to join can claim up to 500 extra spins on your first deposit. To become eligible, you must follow the next steps:

1. Press the promotional button;

2. Fill up the registration form;

3. Make a payment over £50.

The casino will credit the spins when you lose £50 from your first deposit on slots. Gamblers can use the rounds only on predetermined games. Keep in mind that the offer comes with payment method restrictions. The winnings from the spins can be withdrawn without being rolled over. If £50 from the first deposit is lost on slots games, the bonus spins will be added to the players's account. More details about the promotion and the rules that comes with it can be found in the T&C section.

New depositing customers on only 23.04.20 - until further notice. 500 bonus spins, value: £0.10 each, valid for 7 days, to be used on selected NetEnt slots only (Starburst, Scudamore's Super Stakes, Finn and the Swirly Spin, Twin Spin Deluxe, Aloha! Cluster Pays). First deposit min. £50. Bonus spins credited if £50 is lost on slots, from the first deposit amount Bonus spins 500 max. No wagering requirements on bonus spins winnings. Offer active for 14 days from registration. Deposit method restrictions. Full T&Cs apply., 18+ T&C's Apply

♛ 20 Spins on Registration and 100% up to £100 + 200 Spins as Welcome Bonus

Slots Heaven is a Mansion Europe Limited brand. It runs on a custom-made platform.

PRO: 24/7 support; numerous payment methods, including Instant Payments by Citadel and PayPal.

CON: There are no more than 400 games.

If you sign up with Slots Heaven, you may play with 20 extra spins. After depositing, you can claim a match bonus + 200 rounds. 40 spins will automatically load to your account, and the other 160 will be issued in bundles of 20 for 8 consecutive days.

Know that the bonus funds expire in 30 days, and each package of spins must be used 24 hours from their issue date. Slots Heaven will ask a customer to identify themselves both when claiming bonuses and when withdrawing – failure to do so might result in cancellation of the bonus and account closure. It’s possible to withdraw real cash while having an active promo, but this will cancel the said offer.

New customers. Spins: 200 in total with 40 given on first deposit, winnings given as bonus funds, 20x wagering. Spins and bonus wagering on selected aotg games only. Welcome bonus: £20 min deposit, max bonus £100, wagering 40x. Game weighting applies. Betting limits: slots - £5 all other games – 10% of bonus amount. Payment restrictions apply, 18+ T&C's Apply

♛ Welcome Package: 77 Bonus Spins + 100% up to £200

777 casino is a part of the 888 UK Limited family of online casino business, which rounds up half a million players world-wide.

PRO: in-house slots, live dealer games, VIP club

CON: no live chat

At registration, new users can claim 77 bonus rounds, and after making their first deposit over £20, they will receive a match bonus of 100% up to £200. As with all casino bonuses, wagering requirements have to be met before cashing out. The bonus shall work on selected games, available after the user logged in and got the bonus. The game selection of the 777 casino lobby is diverse, and it includes popular providers such as Microgaming, NetEnt and Pragmatic Play.

This offer can be claimed just once per IP or household. Players are advised to stick to the specific terms to avoid losing their bonus funds.

New players only • No Deposit Offer: Claim in 48 hrs • 14 day expiry • Free Spins (FS) wins credited as bonus & capped at £10, exc. JP win • Deposit Bonus Offer: FreePlay (FP) wins credited as bonus & capped at amount received, exc. JP win • Valid for selected games only • Bonus wins capped at £500 • 50x wagering - req. vary by game - in 90 days • UK only - deposit balance available for withdrawal at any time • Withdrawal restrictions & T&Cs apply: No Deposit Offer & Deposit Offer, 18+ T&C's Apply

♛ Welcome Offer: £10 on Registration + Deposit £10, Play with £20

The Sun Bingo is a multiple award-winning online casino that gets its name from the famous newspaper.

PRO: The casino is mobile-friendly; the deposit and withdrawal limit is £5.

CON: Customer support isn't available at all times.

New users are eligible for a registration bonus of £10 and ten more pounds on their first qualifying deposit. They must also spend £10 on tickets to be eligible for this. When claiming the sign-up offer, you will be asked to verify your account via SMS.

As these are bingo bonuses, they correspond to a 4x wagering requirement. Each bonus must be wagered in 7 days.

Real funds are subject to wagering before bingo bonus funds.

Bingo bonuses cannot be withdrawn, but they serve as means of purchasing more tickets. If you have a pending withdrawal, you won't qualify for any offers.

£10 Free: New customers only. Offer runs until 31/05/2021. Opt in, agree to receive promotional marketing, enter the One Time Code and claim a £10 Bingo Bonus. Bonus non-withdrawable, valid for 7 days & has 4 x wagering that must be completed in this time. 1 bonus per player. Deposit £10 Play With £20: Players must deposit and spend £10 cash on bingo. Min £10 deposit. £10 bonus is a bingo bonus which must be wagered x4 before withdrawal. Bonus expires 7 days after receipt if not used entirely. Please play responsibly., 18+ T&C's Apply

♛ Welcome Package at Temple Nile

Temple Nile was established in 2018 and comes with safe deposit methods and games from plenty providers.

PRO: Over 1200 games at your disposal, 24/7 live chat support.

CON: The Customer Support team doesn’t take calls.

Players that just registered here can claim the welcome package, which consists of:

  • 1st deposit: 100% up to £500 + 30 spins on Wild Scarabs;
  • 2nd deposit: 25% up to £800 + 25 spins on Gonzo’s Quest;
  • 3rd deposit: 50% up to £200 + 50 spins on Book of Dead.

The bonus will load into your bonus balance after you deposit. In order to give you a more detailed outlook, we will also mention that:

  1. Only the bonus funds wagers contribute to meeting these requirements;
  2. The maximum limit per bet stands at £5;
  3. It’s possible to withdraw anytime, but the bonus will be revoked should you not meet the wagering constraints.
  4. Different games contribute differently to this requirement. Slots and Scratchcards generally contribute 100%, although there are some exceptions for the slots.
New players only. 1 bonus offer per player. Min. deposit £20. Max bonus bet £5. Extra spins on selected games only- must be used within 72 hours. Winnings from Bonus spins credited as bonus funds and capped at £20. Bonus funds expire in 30 days, unused bonus shall be removed. Bonus funds are 100% match up to £500 + 30 extra spins on 1st deposit, 25% match up to £800 + 25 extra spins on 2nd deposit, and 50% match up to £200 + 50 extra spins on 3rd deposit. Bonus funds are separate to Cash funds, and are subject to 40x wagering the total bonus & cash. Only bonus funds count towards wagering contribution, 18+ T&C's Apply

♛ Up to 20 Sign Up Spins + Up to £20 No Deposit Bonus + Welcome Package up to £300 + 400 Extra Rounds

Casino 2020 aims to do away with all the unnecessary steps and bureaucracy of online gaming. It presents a clean theme platform and a diverse welcome package for new players.

PRO: mega jackpot games, live chat replies fast, call back option

CON: few games available

This casino is a place to enjoy InTouch Games and their Jackpot opportunities. Players can consult gaming tips from the site’s terms. You can rely on the help team for a fast reply, especially on live chat.

After someone creates a new gaming profile, they will receive two types of no deposit deals: up to 20 rounds to be played on Cleopatra’s Prizes and up to £20 no deposit funds. Further in their gaming experience, the first two deposits will bring forth the following:

  1. 100% up to £100 + 400 spins on Cleopatra’s Prizes on the course of 20 days, for a deposit of over £10.
  2. 200% up to £200, for the second deposit of more than £10.
New players only. Up to £20 bonus and up to 20FS (18p) locked to Cleopatra's Prizes at registration (Max withdrawal £50). Up to 400 FS on first deposit for Cleopatra’s Prizes over 20 days, Min dep £10. Expires 00:00 daily, Up to £300 deposit match. Min deposits £10. Dep1: Up to 100%, Max £100. Dep2: up to 200%, Max £200. Bonus and FS winnings subject to 40x wagering requirement. Withdrawing qualifying deposit excludes player from promotion., 18+ T&C's Apply
Code: KING200

♛ 200% up to £50 + 50 Spins on Ninja Master on First Deposit

If you press our promotional button and sign up with Megacasino, you may claim a first deposit offer catering to new users. There are a few extra rules to remember during the redemption process:

  • Insert the KING200 bonus code when registering;
  • After making a qualifying deposit higher than £20, you may claim the promotion – you should be able to see it in your player account.

From this point on, you should remember a few essential rules:

The extra spins are locked to Ninja Master;

  1. You will need to wager both the bonus funds and any winnings from the extra spins 60 times;
  2.  The time limit for completing the wagering requirement is of 30 days;
  3.  This bonus is claimable only once every 72 hours across all Skill on Net platforms.
  4.  You may not bet on more than £5 or 10% of your promo balance.

You can find out more about Megacasino’s policies by accessing their T&Cs page.

First Deposit Only. Min. deposit: £20, max. Bonus £50. Game: Ninja Master, Spin Value: £0.10. WR of 60x Bonus amount and Free Spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the free spin winnings and bonus amount or £5 (lowest amount applies). Free Spins must be used before deposited funds. First Deposit/Welcome Bonus can only be claimed once every 72 hours across all Casinos., 18+ T&C's Apply

♛ Up to 20 Registration Spins + Welcome Package up to £1000 + 100 Extra Spins on Fire and Gold

Dr Slot is a modern online casino, ready to deliver a selection of promotions to its players. Newly registered players at this site have the option to access a welcome package.

PRO: live chat, phone line & call back options, Pay by phone payments.

CON: few games.

Dr Slot is powered by InTouch Games, meaning that their lobby is powered and populated exclusively by them. New games are added periodically, in accordance with the portfolio expansion. Gaming sessions can be personalized by each player from their account settings.

As a new member, you shall receive up to 20 spins on registration. Afterwards, a welcome package is at stake, where the first 5 deposits are credited in accordance with the Dr Slot bonus policy: match bonuses and extra slot rounds. All bonus spins are available on Fire and Gold, exclusively. Match bonuses are triggered by a payment that goes over £10.

New players only. Up to 20 (18p) free spins (FS) on Fire and Gold at registration (Max Withdrawal £50). Up to 100 FS on first deposit, awarded in sets over 10 days. 24hr expiry. Locked to Fire and Gold. Up to £1000 deposit match on first 5 deposits. Min £10 deposit. Dep1: up to 300%, Max £50. Dep2: up to 200%, Max £100. Dep3: up to 100%, Max £150. Dep4: up to 100%, Max £200. Dep5: up to 50%, Max £500. Bonuses and FS winnings subject to 40x wagering requirement. Withdrawing qualifying deposit excludes player from promotion., 18+ T&C's Apply

♛ Up to £10 No Deposit Bonus + up to 100 Extra Spins + up to 200% Bonus up to £100

mFortune offers trustworthy banking options and promotions suitable for all types of players.

PRO: Fast processing payout time, live chat available 24/7.

CON: Small selection of games.

mFortune UK offers to its fresh-registered players a welcome bonus that consist of:

  1. £10 no deposit bonus;
  2. Up to 100 extra rounds;
  3. 200% deposit match up to £100.

The promotion has a wagering requirement of 20 times. Players must know from the start that this offer comes with some rules:

  • The bonus rounds are available only on Super Win 7s;
  • The max cashout for both spins and registration bonus is £200.

Offers can be claimed only after the identity verification is done. Cashing out unspent qualifying deposit will exclude players from the offers. The casino allows players to automatically enroll in the Bingo Loyalty Scheme, using the account created to play. Also, deposits can be made by using Pay by Phone.

New players only. Welcome bonus expires after 7 days. Up to 10 (20p) free spins on Super Win 7s for 10 days, Min Deposit £10. Winnings paid as bonus credit. Expire 00:00 every day. Max withdrawal from free spins and welcome bonus winnings £50. Up to 200% deposit match of first deposit (Min £10). Max £100 awarded as bonus credit. 20x wagering on bonus credit. Withdrawing Unspent Qualifying Deposit will exclude the player from these promotions., 18+ T&C's Apply

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