20+
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How we review
Every casino and bonus is personally tested by our team before being featured (we deposit $50 to each casino). All reviews are independently written by gambling industry professionals and updated regularly to reflect the latest changes. Read more about our review principles.
Affiliate disclosure
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Matti Slotte Written by M.Slotte
Jean-Pierre Lemoine Reviewed by J.-P. Lemoine

Online casino bonuses in the United Kingdom

One of the things I’ve heard most from people who come to KasinoBonus is that they know they should be claiming online casino bonuses—but they don’t know how to actually find them. With thousands of online casinos operating today, and tens of different bonuses, choosing ones with fair terms and generous amounts can seem darn-near impossible!

That’s exactly why I decided to write this page: to help you find the best casino bonus in the UK, understand how these bonuses work—and show you my personal favorite recommendations that you can claim right now.

Best Online Casino Bonuses 2025

To make it as easy as possible for you to find the best online casino bonuses in the United Kingdom, I’ve compiled a table of my favorite offers below. Here, you can see the casino I recommend and information about the bonus they’re currently offering.

CasinoJoy

4.8/5
Aggregated Rating: 49.8
Trustpilot rating: 1.9
CasinoGuru rating: 1.8
AskGamblers rating: 4.7
CasinoOrg rating: 4.8
Established date: 2025
Payout rate: 95.55%
Withdrawal time: 0-3 Days
CasinoJoy review
  • Play on Android, iOS, and desktop
  • Live chat support is available 24/7
  • VPN allowed
20 FREE SPINS no deposit on Book of Helios
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BEST ENGAGEMENT

Jackpot Raider

4.8/5
Aggregated Rating: 69.5
Trustpilot rating: 3.4
Established date: 2022
Payout rate: 96%
Withdrawal time: 0-3 Days
  • Deposit Bonus 225% UP to 450£ + 250 FS ON YOUR FIRST 3 DEPOSITS
250 free spins on your first 3 deposits
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Wheelz

Wheelz

4.5/5
Aggregated Rating: 76.8
CasinoGuru rating: 9.7
Established date: 2020
Payout rate: 96.5%
Withdrawal time: 0-3 Days
  • FREE 20 freespins no deposit
  • Deposit Bonus 100% 300€
20 FREE SPINS NO DEPOSIT - John Hunter and The Book of Tut
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Use Code: 50FS

BetsBunny

4.6/5
Aggregated Rating: 51.5
Trustpilot rating: 2.6
CasinoGuru rating: 2.1
AskGamblers rating: 6.3
Established date: 2023
Payout rate: 96.20
Withdrawal time: 0-3 Days
BetsBunny review
  • 50 no deposit free spins with promo code 50FS
  • Solid lineup of providers — Pragmatic, Nolimit City, Relax
  • Quick withdrawals and decent support
50 No Deposit FREE SPINS on 9 Coins
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WillBet

4.8/5
Aggregated Rating: 77.0
Trustpilot rating: 4.5
CasinoGuru rating: 7.2
AskGamblers rating: 7.6
Established date: 2024
Payout rate: 97%
Withdrawal time: 0-3 Days
WillBet review
  • Built‑in crypto wallets with support for over 20 coins
  • 4,000+ games
  • Tiered VIP ladder offering
No deposit bonus: 5 FREE SPINS for BGaming slots
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Use code: FOR20

Stupid Casino

4.6/5
Aggregated Rating: 61.0
Trustpilot rating: 2.5
CasinoGuru rating: 5.4
AskGamblers rating: 7
Established date: 2023
Payout rate: 96.5%
Withdrawal time: 0-3 Days
Stupid Casino review
  • Home to more than 80 gaming providers
  • 24/7 live chat
  • Excellent selection of payment methods
20 FREE SPINS on Tower of Fortuna
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Use Code: KBSPIN555

SpinBetter

4.8/5
Aggregated Rating: 80.0
Trustpilot rating: 3.8
CasinoGuru rating: 8.4
AskGamblers rating: 9
Established date: 2019
Payout rate: 96,07%
Withdrawal time: 0-3 Days
  • Regular players can benefit from their loyalty program
  • No deposit bonuses can be activated
  • Their online slots include titles with progressive jackpots
  • For bettors, they provide a sports betting section
150 Free Spins Without Deposit With Our Promo Code (x25 Wager)
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Rollino

4.5/5
Aggregated Rating: 70.0
Established date: 2023
  • Total value of free spins: €2 (20 spins at €0.1 per spin)
  • Wagering criteria: 40X
  • Maximum bet: €0.5 (wagering)
20 FREE SPINS on Take Olympus (Betsoft). Verify his email to activated the NDB.
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SlotsStars

4.6/5
Aggregated Rating: 64.3
Trustpilot rating: 2.5
CasinoGuru rating: 7.8
AskGamblers rating: 5.9
Established date: 2018
Payout rate: 92.33–97.15%
Withdrawal time: 0–3 days
  • Operate under UKGC and MGA
  • Live chat available
  • Mobile friendly design
  • Top tier software providers
125 no deposit free spins with registration
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Use Code: 50FS

Froggybet

4.5/5
Aggregated Rating: 66.5
Trustpilot rating: 2.5
AskGamblers rating: 7.6
Established date: 2025
Payout rate: 97.5%
Withdrawal time: 0-3 Days
Froggybet review
  • Supports 9 languages
  • Many responsible gambling tools
  • Extensive game collection
  • 24/7 live support
50 FS No Deposit + 50 FS on Gonzo’s Quest with 1st Deposit
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NationalBet

4.5/5
Aggregated Rating: 58.8
Trustpilot rating: 2.1
CasinoGuru rating: 5.3
Established date: 2020
Payout rate: 96.5%
Withdrawal time: 1-4 Days
  • No wagering: 50 free spins without wagering for Gates of Olympus when you make a deposit.
  • Deposit bonus: 250 free spins for 3 first deposits
250 free spins for 3 first deposits + 50 free spins after a deposit
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Spinz

4.6/5
Aggregated Rating: 73.8
Trustpilot rating: 2.7
CasinoGuru rating: 9.7
AskGamblers rating: 7.4
Established date: 2018
Payout rate: 96.5%
Withdrawal time: 0-4 Days
  • FREE 100 freespins (deposit needed)
  • Deposit Bonus 100% 300€
100% Bonus to 300€ + 100 Freespins
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BassWin

4.0/5
Aggregated Rating: 57.0
Trustpilot rating: 3.1
CasinoGuru rating: 5.1
AskGamblers rating: 4.5
Established date: 2024
Payout rate: 92-98%
Withdrawal time: 0-7 Days
  • Extensive game selection from over 150 software providers
  • Mobile-optimised website
  • Offers both traditional sports betting and eSports
No Deposit Bonus: 50 FS in Lucky Dama Muerta
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Bonus code: W20TOF

Wolfy

4.6/5
Aggregated Rating: 55.3
Trustpilot rating: 2.2
CasinoGuru rating: 3
AskGamblers rating: 7.7
Established date: 2020
Payout rate: 95.3%
Withdrawal time: 0-2 Days
Wolfy review
  • Multiple payment options
  • Home to leading software providers
  • Live chat is available
20 FREE SPINS no deposit for Tower of Fortuna
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Use code: 50FS

Cipher Wins

4.0/5
Aggregated Rating: 66.5
Trustpilot rating: 2.9
AskGamblers rating: 6.8
Established date: 2025
Payout rate: 96%
Withdrawal time: 0-3 Days
  • Home to more than 5,000 games
  • 24/7 live chat
  • Multi-lingual support available
50 FS no deposit on Wilds of Fortune
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FatPirate

4.5/5
Aggregated Rating: 61.0
Trustpilot rating: 2.4
CasinoGuru rating: 7.1
AskGamblers rating: 5.5
Established date: 2024
Payout rate: 97%
Withdrawal time: 0-3 Days
  • Welcome bonus 100% up to €500 + 200 FS
Welcome bonus 100% up to €500 + 200 FS
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Casinolab

4.5/5
Aggregated Rating: 42.8
Trustpilot rating: 1.7
CasinoGuru rating: 2.5
AskGamblers rating: 4.2
Established date: 2021
Payout rate: 96%
Withdrawal time: 0-3 Days
  • Welcome bonus 100% up to €500 + 200 FS + 1 Bonus Crab
  • Weekly Reload 50 Free Spins
  • Weekend Reload Bonus €700 + 50 Free Spins
Welcome bonus 100% up to €500 + 200 FS + 1 Bonus Crab
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EXCLUSIVE

BetFury

4.9/5
Aggregated Rating: 80.0
Trustpilot rating: 3.8
CasinoGuru rating: 9.8
AskGamblers rating: 7.6
Established date: 2019
Payout rate: 97%
Withdrawal time: 0-3 Days
  • FREE 100 freespins no deposit needed (Betfury Bonanza, Joker Stoker, Bastet, Cats)
  • Deposit Bonus 200% to 500$ USE CODE: KASINOBONUS
100 Freespins NO DEPOSIT!
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EXCLUSIVE

Slotland

4.8/5
Aggregated Rating: 77.5
Trustpilot rating: 4.3
CasinoGuru rating: 8.8
AskGamblers rating: 6.4
CasinoOrg rating: 3.6
Established date: 1998
Payout rate: 95%
Withdrawal time: 0-3 Days
  • FREE 32$, no deposit bonus, use code FREE32KASI
  • Deposit Bonus 250% match bonus
32$ NO DEPOSIT BONUS - Use Code FREE32KASI
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BC Game

4.7/5
Aggregated Rating: 51.3
Trustpilot rating: 1.3
CasinoGuru rating: 7.2
AskGamblers rating: 1.9
CasinoOrg rating: 4.4
Established date: 2019
Payout rate: 97%
Withdrawal time: 0-3 Days
  • Crypro payments
  • Instant withdrawal casino
Up to 470% deposit bonus + 400 free spins
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Caxino

4.7/5
Aggregated Rating: 70.0
Trustpilot rating: 1.8
CasinoGuru rating: 9.7
AskGamblers rating: 7.7
Established date: 2018
Payout rate: 96.5%
Withdrawal time: 0-3 Days
  • FREE 100 free spins (deposit needed)
  • Deposit Bonus 100% 200€
100% Bonus to 200€ + 100 Freespins!
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NO WAGER

Chipz

4.7/5
Aggregated Rating: 81.3
Trustpilot rating: 4.3
CasinoGuru rating: 9.7
AskGamblers rating: 7.2
Established date: 2021
Payout rate: 96%
Withdrawal time: 0-3 Days
  • FREE Deposit 10€ -> Get 100 Freespins - NO WAGER!
Deposit 10€ -> Get 100 Freespins - NO WAGER!
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CRYPTO CASINO

Jackbit

5.0/5
Aggregated Rating: 82.0
Trustpilot rating: 4.4
CasinoGuru rating: 8
AskGamblers rating: 9
Established date: 2022
Payout rate: 97%
Withdrawal time: 0-3 Days
  • Deposit Bonus 100 wager free spins (50$ deposit needed)
  • 10% Cashback Sportsbetting
100 Wager Free Spins (50$ deposit needed) - Admiral Nelson
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EXCLUSIVE

Win A Day Casino

4.6/5
Aggregated Rating: 75.5
Trustpilot rating: 4
CasinoGuru rating: 9
AskGamblers rating: 6.2
Established date: 2015
Payout rate: 95.5%
Withdrawal time: 0-3 Days
  • FREE 30$ (25$ deposit needed)
  • Deposit Bonus 250% match bonus
30$ FREE, use code FREE32KASI (25$ deposit needed)
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Use Code: KB300

BetMaximus

4.6/5
Aggregated Rating: 50.0
Trustpilot rating: 2.1
CasinoGuru rating: 7.8
AskGamblers rating: 1
Established date: 2023
Payout rate: 96.5%
Withdrawal time: 0-3 Days
  • FREE 25 Freespins to Book of Dead - NO DEPOSIT. IMPORTANT - USE Promo Code: BOOK25 after registration to get the spins!
  • Deposit Bonus Deposit bonus 300% up to 300 EUR. Use code KB300. 35x wager
First Deposit Bonus 300% up to 300 EUR. Deposit 100 EUR play with 400 EUR!
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I’ve spent years compiling a list of the best casino bonuses—and I’m always careful to make sure this table is updated regularly. What’s more, any casino/bonus I recommend on KasinoBonus is one that I’ve personally claimed and tested.

How We Review Casinos

Here at KasinoBonus, I’ve made sure that our review process is as detailed, transparent, and in-depth as possible. As a player, I know how important it is to be able to access unbiased, factual information about casinos you’re thinking of joining—and that’s why I can guarantee that you’ll never find fake, untrue, or biased content here.

Our process begins with very detailed research to explore the ‘basics’ of what the casino has to offer. This includes looking at who owns the brand (and whether any previous companies have operated them in the past), which online gambling they hold, and what the general security of their website is like.

Top Bonuses in July

Here at KasinoBonus we’re always on the lookout for the best casino bonuses available to UK players. That’s why, each month, our team goes through – and finds – the best UK-specific bonuses and promotions that are available to claim – and if you’re curious about our top picks for July, you can find a list of recommended bonus offers, below!

CASINOBONUS OFFER
Paddy PowerDeposit £10 → 60 Free Spins (no deposit) + 100 Spins on deposit
BetMGM UK100% up to £200 + 100 Free Spins
Sky Vegas50 Free Spins (no deposit, no wagering) + Deposit £10 → 200 Free Spins
Virgin BetStake £10 on slots → 100 Free Spins

Types Of Casino Bonus

I going to describe each casino bonus type below.

Terms and Conditions

When reviewing or claiming any online casino bonus, you should be aware that almost every bonus you claim will come with terms and conditions attached. Some of the key ones to be aware of include: 

How Casino Bonuses Work

Casino bonuses are promotions offered by most – but not all – online casinos that are designed to attract new players and reward loyal customers. These bonuses can come in a variety of different forms – including free spins, deposit matches, cashback, and no-deposit promotions. Despite the multiple formats, however, all of these bonuses share one thing in common: they’re designed to give you more value – and time to play.

Now, at most online casinos, when you sign-up and join, you’ll be presented with a welcome bonus. This might be a match bonus (e.g. 100% up to £100), meaning the casino will match your first deposit up to a certain amount – or it might be free spins. It can, in some instances, be a combination of both, too! Of course, these welcome bonuses are designed to attract new sign-ups, but existing players can also enjoy a variety of perks. 

Active players, for example, may be offered things like reload bonuses, cashback on losses, loyalty rewards – or even entry into VIP or loyalty programs!

Popular Online Slots with Free Spins Bonus

ONLINE SLOTGAME PROVIDERBONUS FREE SPINSRTPCASINO BRAND
Sweet BonanzaPragmatic Play2096.51 %Rollino
Book of MuseumGameArt2596.10 %Horus Casino
Angry DogsGameArt2596.36 %Kryptosino
HollywoofGameArt2596.10 %Vegaz Casino
Sweet BonanzaPragmatic Play3096.51 %Megapari
Book of DeadPlay’n GO2596.21 %BetMaximus
Ruby Win Hold the SpinGamzix2596.00 %LevelUp Casino
Betfury Catch BonanzaNetGame10096.05%BetFury
Joker StokerEndorphina10096.00%BetFury
Bastet and CatsBetfury10096.20%BetFury
Doors Of FreshBGaming5096.85 %Fresh Casino
Gates of OlympusPragmatic Play5096.50 %Campeonbet
Alien FruitsBGaming5097.00 %Drip Casino

Jackpots in Online Slots Today

Name Amount Details
1 Betsoft Gaming
€1,851,014
2 iSoftBet
€441,074
3 Microgaming
€10,720,105
4 Netent
€219,152
5 Play'n GO
€168,904
6 Playtech
€3,983,442
7 Yggdrasil
€402,884

Why Trust KasinoBonus.ai?

At KasinoBonus.ai, trust is the foundation of everything we do. Here’s why thousands of readers rely on us:

  • 50,000 readers every month
  • 150 online casinos are tested
  • 400+ hours per month spent on casino research and content creation
  • Every casino we list is personally tested by our team (screenshots of accounts, deposits, and wins).
  • Our reviews are written and reviewed by iGaming professional Matti Slotte with 18 years of experience in poker, casino operations, and European gambling regulation.
  • We talk openly about our affiliate partnerships and never accept payment for positive reviews.
  • We update our rankings and bonus details every month to show the most accurate and up-to-date information available.
  • We recommend only licensedsafe, and responsible online casinos.

Responsible Gambling, Addiction – and Resources

Here at KasinoBonus, we strongly believe that gambling should always be an enjoyable and recreational activity – and never a source of stress, financial difficulty, or emotional harm. That’s why we fully support and promote responsible gambling. For example, we strongly suggest setting limits on your time and spending, only gambling with money you can afford to lose – and, recognising when it’s time to take a break. 

Every casino we list is licensed by reputable regulatory bodies, like the UK Gambling Commission, which require operators to provide tools like deposit limits, reality checks, time-outs, and self-exclusion.

However, we also recognise that for some individuals, gambling can become problematic – after all, gambling addiction is a recognised behavioural disorder that can affect anyone – regardless of age, background, or experience level. It may start with chasing losses, gambling more frequently, or using gambling as an escape from stress or low mood. Warning signs include hiding gambling activity, borrowing money to gamble, or feeling anxious or irritable when trying to cut back. If you suspect that gambling is no longer under your control, it’s important to seek help as early as possible.

There are many excellent resources available for those who need support. In the UK, organisations such as GamCare, BeGambleAware, and the National Gambling Helpline offer confidential, professional assistance. You can also access free tools like GAMSTOP, which blocks access to all UK-licensed gambling sites. Some resources are listed below:

Responsible gambling and gambling addiction warning

Online gambling is an entertainment with the purpose of having a good time, but is not intended for financial gain. You should not pursue winning. Gambling addiction is a behaviour that can have very serious consequences for your life. If you feel you can not stop gambling, seek help immediately - all the contacts you need can be found on our Gambling Addiction page.

Gambling Foundation offers free and confidential support to anyone suffering from problem gambling in Finland.

Matti Slotte
Author Matti Slotte

Matti Slotte is a seasoned iGaming professional from Kuopio, Finland, with 17 years of experience in online casino reviews, affiliate marketing, and regulatory trends in the European gambling space. As the founder and Editor-in-Chief of KasinoBonus.io, he combines hands-on experience with deep industry insight to provide players with trustworthy and up-to-date casino bonus information. Matti regularly tests casinos firsthand, evaluates their bonus mechanics, and follows international gambling regulations to ensure transparent and safe recommendations. Matti Slotte is an expert in online gambling, poker, online casinos.

LinkedIn Biography page: Matti Slotte

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