The Top 10 UK Online Casino Bonuses of 2021

If you've been searching for top online casino bonuses in the UK, you're in the right place. Our chart provides you with rankings, ratings and reviews based on our research and industry expertise, along with bonus information, to help you compare and find the best online casino for you.

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sun-casino
Welcome Bonus
100% Bonus up to £300
Rate it! (4676)
8.7
Top Slots Sites of {year}
Top Slots Sites of 2021
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Exclusive Offer
32red
Welcome Bonus
150% Bonus up to £150
+32 Super Spins
18+. BeGambleAware.org. New customers only. Min. £10 depo...18+. BeGambleAware.org. New customers only. Min. £10 deposit, debit card only. Up to 50x wagering, game contributions vary, max. stake applies, 7 day expiry. Full T&C's apply.View full terms & conditions
Starburst
Starburst
Starburst

Starburst

There's a reason it's one of the most popular slots worldwide, with free spins and bonuses galore.

Play Now
Who Wants to be a Millionaire
Who Wants to be a Millionaire
Who Wants to be a Millionaire

Who Wants to be a Millionaire

The popular TV game show from the UK has finally made it onto the slot reels.

Play Now
Mega Moolah
Mega Moolah
Mega Moolah

Mega Moolah

World-famous for a reason, see what all the fuss is about in this African-themed slot.

Play Now
Rate it! (4356)
9.8
mr-q
Welcome Bonus
Deposit £10
Get 30 Free Spins
New customers only. 18+ T&Cs and wagering requirements ap...New customers only. 18+ T&Cs and wagering requirements apply.View full terms & conditions
Starburst
Starburst
Starburst

Starburst

There's a reason it's one of the most popular slots worldwide, with free spins and bonuses galore.

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Gonzo's Quest
Gonzo's Quest
Gonzo's Quest

Gonzo's Quest

Follow Gonzo's adventure to Eldorado – the legendary lost city of gold – and follow your heart's desires.

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Rainbow Riches
Rainbow Riches
Rainbow Riches

Rainbow Riches

Somewhere over the rainbow lies a pot of gold - will you be able to find it in this exciting slot game?

Play Now
Rate it! (5769)
9.5
buzz-bingo
Welcome Bonus
Spend £20
Get 110 Bonus Spins
on Midnight Wilds
First depositors only. Deposit & Stake £20 on Midnight Wi...First depositors only. Deposit & Stake £20 on Midnight Wilds slot game: Get 110 Bonus Spins on Midnight Wilds slot at 5p (5 lines x 1p) per spin. Jackpot cannot be won when using free spins. Customers will also be eligible for existing standard sign up bonuses if they stake an additional £10 on Bingo, see T&Cs for details. £5 min. withdrawal on winnings. T&Cs apply. 18+ BeGambleAware.org. Please play responsibly.View full terms & conditions
Kingdoms Rise
Kingdoms Rise
Kingdoms Rise

Kingdoms Rise

Explore the Kingdoms Rise universe. What will you find in this special fantasy world?

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Age of the Gods
Age of the Gods
Age of the Gods

Age of the Gods

Travel back to Ancient Greece for a progressive, historical win!

Play Now
Gladiator
Gladiator
Gladiator

Gladiator

Will it be a thumbs up or down? Play this progressive slot and find out.

Play Now
Rate it! (4625)
9.3
Top Live Casino Sites of {year}
Top Live Casino Sites of 2021
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Popular Live Casino Site
grosvenor
Welcome Bonus
200% Bonus up to £700
New customers only. 18+ T&Cs and wagering requirements ap...New customers only. 18+ T&Cs and wagering requirements apply.View full terms & conditions
Rate it! (4593)
9.8
sky-casino
Welcome Bonus
Join & Spend £10
Get a £60 Bonus
18+. New customers only. Opt in required. Min £10 staking...18+. New customers only. Opt in required. Min £10 staking requirement applies. Max bonus £60 with a x40 wagering requirement, to which table & card games contribute 20%. 30 day bonus expiry period applies. Staking rules apply. Eligibility restrictions apply. Further Ts&Cs applyView full terms & conditions
Rate it! (4932)
9.4
party-casino
Welcome Bonus
Deposit £10, Get 120 Free Spins
New customers only. 18+ T&Cs and wagering requirements ap...New customers only. 18+ T&Cs and wagering requirements apply.View full terms & conditions
Rate it! (1242)
9.2

About Casino Bonuses

It probably isn’t a good idea to choose an online casino purely because of the available bonuses, but it is certainly something you will want to take into account. Ideally, you want a venue that offers the games you like, creates a suitably entertaining environment, treats you well, and offers great promotions. A casino bonus is a reward that you receive for completing a certain action. The most common types include:

  • Sign-up
  • First deposit
  • No deposit
  • Payment method
  • Monthly
  • Welcome
  • ‘Refer a friend’ 
  • High-roller 
  • Reload 
  • Matching deposit 

The Best Online Casino Games

One of the biggest misunderstandings about casino bonuses is the idea that this credit is somehow worthless. It is true that there can be restrictions on how this credit is used, but otherwise it is treated the same as the money you add to your account. In order words, if you don’t take advantage of your casino bonus, it does mean you will be losing out. The main reason so many of us underestimate the value of free casino bonuses is that it sounds too good to be true. Why would these online venues give away something for nothing? The reality is that there is a great deal of competition between the various casinos, and they are part of the price required to win your custom.

What to Look for When Choosing Casino Bonuses

One of the most important considerations when considering casino bonuses is the restrictions that apply to it. The less repeatable casinos can have so many strings attached to this free credit that it makes it almost worthless. One of the advantages of using a website like this one is we tell you the real value of the offers so you can base your decision on more than just hype. The most common types of restrictions that apply include:

  • Sticky – can never be cashed out; this credit stays in your account but you can withdraw any winnings you accumulate using it
  • Phantom – disappears as soon as you cash out
  • Cashable – you can turn this credit directly into cash although there may be wagering requirements that apply to it
  • Non-cashable – e.g. sticky or phantom 
  • Time-limited – you need to use it within a certain time limit
  • Insurance – this is given as a percentage of your losses

There are many players who have become obsessed with bonus hunting. It is always nice to get something for nothing, but you don’t have to waste too much time on this type of activity. We provide all the latest information you need about available bonuses here. You can use our comparison charts to quickly find the latest best deals – we recommend you check these charts regularly if bonuses are important to you. Some casinos can be generous with their first-deposit promotion but a bit stingy otherwise. We suggest that you consider the full package of bonuses before choosing one of these venues. If you are going to be returning to the same venue regularly, your loyalty should be rewarded.

The Advantages of a Casino Bonus

A casino bonus means you get to play with some free credit. It allows you to play more games, so it increases the likelihood of you hitting the jackpot – it also means that you get to spend more time playing. The availability of so many attractive promotions is one of the advantages of online casinos, and you can do well out of these special offers if you know what you are doing. You can use the information on our website to find the best casino bonuses as well as other important information you will need when choosing a venue.

WHY CHOOSE William Hill?

inspirational-image
Our Score:
9.8
Top Highlights:
  • Trusted brand since 1934
  • Won multiple gaming awards
  • Wide range of casino games
Special Welcome Bonus:
Join & Spend £10
Get a £50 Bonus
Get Bonus
What Our Expert Has To Say:
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Top 10 Staff
"If you’re seeking out an established name in the gambling world for your next online casino site, you could scarcely hope for a finer example of the breed than William Hill; back when it was founded in 1934, it wasn’t even legal to gamble in Britain. Even the brand’s online casino arm has been around since 1998, amounting to more than two decades’ experience on the web in which to place your trust."

WHY CHOOSE Sky Vegas?

inspirational-image
Our Score:
9.6
Top Highlights:
  • Highly familiar and trusted Sky brand
  • Hundreds of top-notch casino games
  • Free spins with no deposit needed
Special Welcome Bonus:
Deposit £10
Get 500 Free Spins
Get Bonus
What Our Expert Has To Say:
inspirational-image
Top 10 Staff
"Sky Vegas has long been Sky’s main online casino division, and its colourful and vibrant site certainly suggests a fun, constantly stimulating place. Its ‘no deposit, no wagering’ approach to its new customer bonus, however, helps to make it stand out even more. As for the games, those include both generic and branded slots, jackpots and Megaways games, as well as table games."

WHY CHOOSE Buzz Bingo?

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Our Score:
8.9
Top Highlights:
  • VIP special rewards
  • Enticing monthly jackpots
  • Fun general knowledge quizzes
Special Welcome Bonus:
Spend £20
Get 110 Bonus Spins
on Midnight Wilds
Get Bonus
What Our Expert Has To Say:
inspirational-image
Top 10 Staff
"Buzz Bingo was born in the 2010s, and is known for its physical bingo clubs dotted around the UK. Its online bingo arm offers a bonus for existing members of these clubs, as well as fun and vibrant 75-ball, 80-ball and 90-ball bingo rooms. It also showcases various Slingo games – these being a cross between slots and bingo."

WHY CHOOSE 32Red?

inspirational-image
Our Score:
8.7
Top Highlights:
  • Multiple Customer Awards
  • Unique bonuses & promotions
  • Popular with UK players
Special Welcome Bonus:
150% Bonus up to £150
+32 Super Spins
Get Bonus
What Our Expert Has To Say:
inspirational-image
Top 10 Staff
"32Red appeals to players seeking a broad assortment of slots, roulette, blackjack, jackpot and poker games, as well as some less common options, such as Slingo. Its promotions and bonuses are also more varied and quirky compared to many obvious competitors, with both weekly and personalised promos on offer. "

WHY CHOOSE Sun Casino?

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Our Score:
8.7
Top Highlights:
  • In-depth range of slots
  • Awards loyalty points
  • The Sun newspaper branding
Special Welcome Bonus:
100% Bonus up to £300
Get Bonus
What Our Expert Has To Say:
inspirational-image
Top 10 Staff
"The Sun is one of the most recognised brands in the UK, thanks to its association with the tabloid newspaper of that name – and since the summer of 2019, it’s also had this fun-looking online casino to its credit. The site is operated by VF2011 Limited, and presents a broad assortment of jackpots, slots, roulette, blackjack and other casino games for its members. The variety of titles on offer – especially slots – is a strong one, and the site design is casual and colourful. "

WHY CHOOSE Poker Stars?

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Our Score:
8.5
Top Highlights:
  • Many exclusive slots games
  • Various branded slots
  • Highly informative help pages
Special Welcome Bonus:
Bet £10, Get 100 Free Spins
Get Bonus
What Our Expert Has To Say:
inspirational-image
Top 10 Staff
"Although it’s obviously much better known as a poker destination, PokerStars also has an online casino arm that users can access with the same member account. Here, a vast range of slots can be played, including Megaways, jackpot and high-roller options. So, if you’re really into both poker and slots, this might be the ideal one-stop-shop. "

WHY CHOOSE Virgin?

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Our Score:
8.4
Top Highlights:
  • Operated by highly trusted Gamesys
  • Daily free games
  • Exclusive Virgin-related offers
Special Welcome Bonus:
Play £10, Get £10
+30 Free Spins
Get Bonus
What Our Expert Has To Say:
inspirational-image
Top 10 Staff
"An obvious reason to sign up to Virgin Games is the special offers it gives you that draw upon other parts of the colossal Virgin empire. But the site presents a nice range of regularly changing promos in general, while the games encompass both familiar and more obscure jackpots, slots, roulette, blackjack, poker, bingo and live casino games."

WHY CHOOSE Paddy Power?

inspirational-image
Our Score:
8.2
Top Highlights:
  • Varied, quirky, regularly-updated promotions
  • Downloadable casino software
  • Both common and lesser-spotted games
Special Welcome Bonus:
Bet £10, Get 250 Free Spins
Get Bonus
What Our Expert Has To Say:
inspirational-image
Top 10 Staff
"Paddy Power is one of the longest-established and best-known bookmakers, with its online casino arm being just one part of a broader gambling empire encompassing a sportsbook, virtuals, bingo and more. With the promos and games constantly changing – the latter including both branded and generic titles – you can be sure of always being stimulated here."