Best Slots Bonus in the UK: May 2024

Slots bonuses can really enhance your experience when playing at UK slot sites. Online-Slot.co.uk breaks down all the necessary information on the best slot bonus available for UK players. This includes the top list, how we rank and evaluate bonus offers, the types of slot bonuses available and what slot games they are available on.

Intended for beginners, seasoned players and avid slots players, we first deep-dive into the top-rated sites offering these slots bonuses.

  1. Duelz Casino
    5/5
    Based on our expert’s review. Reviewed by
    100% Bonus up to £100 + 100 Free Spins
    1000+ Slots
    6 Minute Cashouts
    UK Licence: 48695

    • 10% Weekly Cashback
    • PayPal friendly
    • 24/7 Customer Support
    Providers:
    microgaming
    netent
    nolimit-city
    play-n-go
    pragmatic-play
    relax-gaming
    Payments:
    debit-cards
    muchbetter
    neteller
    paypal
    paysafecard
    trustly
    T&Cs Apply 18+ new players only. Minimum deposit: £20. Maximum £100 bonus. Max bet with an active bonus: £2. Wagering requirement 100% match bonus: 30 times sum of deposit + bonus. Max redeemable from welcome bonus: £500. 100 Free Spins are given out 20 per day on Book of Dead for 5 days in a row, log in each day is required. Max Free Spins winnings: £100. Winnings from Free Spins are credited as bonus money with a wagering requirement of 45 times. Free Spins expire after 3 days. Some games may not be played with a bonus. Games may contribute differently when wagering a bonus. Play Responsibly! www.begambleaware.org. #ad
  2. Casumo Casino
    4.5/5
    Based on our expert’s review. Reviewed by
    100% Bonus up to £100 + 20 Bonus Spins
    2,100+ Slots
    Within 48 Hours
    UK Licence: 39265

    • Loyalty Program
    • Plenty of Promotions
    • iOS + Android Mobile Apps
    Providers:
    igt
    netent
    nolimit-city
    play-n-go
    push-gaming
    relax-gaming
    Payments:
    apple-pay
    muchbetter
    neteller
    paypal
    paysafecard
    skrill
    T&Cs Apply 18+. New customers. Opt-in required. 20 Bonus Spins on “Sahara Riches Cash Collect” at 10p per spin and 100% Deposit Bonus up to £100 on first deposit (payment method and play restrictions apply). Min. deposit £10. 30x wagering for Bonus Spins and Deposit Bonus (game weighting applies). Max. £5/spin or £0.50/line. 30 days expiry. Please gamble responsibly • www.begambleaware.org #ad
  3. Playzee Casino
    4.5/5
    Based on our expert’s review. Reviewed by
    100% Bonus up to £300 + 150 Zee Spins
    3,700+ Slots
    2-24 Hours
    UK Licence: 52894

    • Zee Daily Offers
    • Weekend Cashouts
    • Zee Points + Zee Club
    Providers:
    big-time-gaming
    elk-studios
    netent
    nolimit-city
    play-n-go
    push-gaming
    Payments:
    apple-pay
    debit-cards
    muchbetter
    neteller
    paypal
    paysafecard
    T&Cs Apply 18+ New players only. Min Dep £20. Max Bonus Bet £5. Offer: 100% of 1st deposit up to £300 + 150 Zee Spins on Starburst (first 60 credited on 1st deposit; rest credited at 07:00GMT at 10/day) + 500 Zee Points. Spins expire after 23:59GMT on day they’re credited. Winnings from each set of spins capped at £50 & credited as bonus. Bonus funds expire after 30 days, are separate to Cash funds, & subject to 35x wagering of bonus + deposit amounts. Affordability checks apply Full Terms Apply BeGambleAware.org #ad
  4. Jackpot Casino
    4.3/5
    Based on our expert’s review. Reviewed by
    50 No Wager Free Spins on Bigger Bass Bonanza
    1,000+ Slots
    Within 72 Hours
    UK Licence: 49262

    • 50+ Megaways Slots
    • UK Customer Support
    • Playtech Games
    Providers:
    microgaming
    netent
    play-n-go
    playtech
    pragmatic-play
    quickspin
    Payments:
    boku
    muchbetter
    neteller
    paypal
    paysafecard
    trustly
    T&Cs Apply Terms and Conditions Apply. New players only. 18+. Minimum deposit and play £15. No wagering requirements. Max cashout £100. Gambling can be addictive, please play responsibly. #ad
  5. Party Casino
    4.3/5
    Based on our expert’s review. Reviewed by
    Exclusive 120 Free Spins on NetEnt's Starburst
    3,800+ Slots
    6 Hour Cashouts
    UK Licence: 54743

    • Fantastic Mobile App
    • Loyalty Program
    • Numerous Slot Tournaments
    Providers:
    elk-studios
    hacksaw-gaming
    nolimit-city
    pragmatic-play
    red-tiger-gaming
    yggdrasil-gaming
    Payments:
    apple-pay
    g-pay
    muchbetter
    neteller
    paypal
    skrill
    T&Cs Apply 18+. New depositors only. UK residents only. Minimum deposit $10. Free Spins are valid only on Starburst and expire in 7 days. 10x wagering apply. Certain deposit types are excluded. T&Cs apply. #ad
  6. Jackie Jackpot
    4/5
    Based on our expert’s review. Reviewed by
    50 No Wagering Spins + Regular Promotions
    1,500+ Slots
    0-2 Days On Average
    UK Licence: 39483

    • 24/7 Live Chat
    • PayPal Casino
    • Search slots by provider
    Providers:
    blueprint-gaming
    elk-studios
    hacksaw-gaming
    microgaming
    netent
    nolimit-city
    play-n-go
    pragmatic-play
    quickspin
    red-tiger-gaming
    yggdrasil-gaming
    Payments:
    astropay
    bank-transfer-general
    debit-cards
    muchbetter
    paypal
    paysafecard
    skrill
    T&Cs Apply New players only. 18+. Min Deposit £10. Max Bonus 50 Spins on Big Bass Bonanza. No Wagering Applies. Spins Available for 24 Hours After Being Credited. Promo Code: BBB50. Valid Until 31.12.2023 #ad
  7. LeoVegas Casino
    4.5/5
    Based on our expert’s review. Reviewed by
    Up to £100 + 50 Wager-Free Spins
    3,000+ Slots
    Within 24 Hours
    UK Licence: 39198

    • iOS/Android Mobile Apps
    • Exclusive Slots
    • Award-winning Customer Support
    Providers:
    big-time-gaming
    netent
    nolimit-city
    play-n-go
    push-gaming
    relax-gaming
    Payments:
    apple-pay
    bank-transfer-general
    debit-cards
    paypal
    T&Cs Apply 18+ begambleaware.org, T&Cs apply. New reg only. Opt in & deposit £10, £25 or £50 within 7 days & further 7 days to wager cash stakes 35x to unlock reward (£50 on 2 deposits). 3 day exp. Wagering/game contributions vary. 25 wager-free spins x10p to added to Big Bass Splash with each qualifying deposit, 3 day expiry. #ad
  8. Lottoland Casino
    4/5
    Based on our expert’s review. Reviewed by
    50 Free Spins On Rainbow Jackpots
    1,800+ Slots
    48 Hours on Average
    UK Licence: 38991

    • £1 Minimum Deposits
    • Plenty of Existing Customer Promos
    • 80+ Megaways Slots
    Providers:
    microgaming
    netent
    nolimit-city
    play-n-go
    pragmatic-play
    relax-gaming
    Payments:
    debit-cards
    muchbetter
    paysafecard
    trustly
    T&Cs Apply 18+, New customers only, register, deposit and stake £10 on Rainbow Jackpots, and receive 50 Free spins on Rainbow Jackpots. 7 day bonus expiry. Ends 30/06/24 at 23:59 GMT. Full T&Cs Apply. begambleaware.org. #ad
  9. Mr Vegas Casino
    4.2/5
    Based on our expert’s review. Reviewed by
    100% Bonus up to £200 + 11 Wager Free Spins
    4,000+ Slots
    0-2 Day Cashouts
    UK Licence: 39380

    • Slots Tournaments
    • Regular Promotions
    • Live Chat Support
    Providers:
    netent
    nolimit-city
    play-n-go
    pragmatic-play
    push-gaming
    relax-gaming
    Payments:
    bank-transfer-general
    debit-cards
    neteller
    paypal
    paysafecard
    skrill
    T&Cs Apply New Players only. Min deposit: £10, Wager req: 35x deposit bonus,  Bonus will be paid out in 10% increments to your cash account. Account balance is withdrawable at any time. Upon withdrawal, any remaining bonus is forfeited. Max bet is: £10. Play responsibly. #ad
  10. MrQ Casino
    4.4/5
    Based on our expert’s review. Reviewed by
    75 No Wager Free Spins Promo Code OSLOT
    1,000+ Slots
    6 Hours on Average
    UK Licence: 51250

    • iOS + Android Mobile Apps
    • No Wagering Casino
    • Highest RTP Rates for Online Slots
    Providers:
    microgaming
    netent
    nolimit-city
    play-n-go
    push-gaming
    relax-gaming
    Payments:
    bank-transfer-general
    debit-cards
    pay-by-mobile
    paypal
    T&Cs Apply First deposit only. Min deposit & spend £20. Max 75 spins on The Goonies Megaways at 10p per spin. Spins credited upon spend of £20. 18+ Full T&Cs apply.18+; Play Responsibly! www.begambleaware.org #ad
  11. Casushi Casino
    5/5
    Based on our expert’s review. Reviewed by
    100% Bonus up to £50 + 50 Bonus Spins
    1,000+ Slots
    Within 24 Hours
    UK Licence: 39398

    • Loyalty Programme
    • PayPal Casino
    • Search slots by provider
    Providers:
    big-time-gaming
    elk-studios
    microgaming
    netent
    nolimit-city
    play-n-go
    Payments:
    apple-pay
    debit-cards
    paypal
    paysafecard
    skrill
    trustly
    T&Cs Apply 18+. New players only. 100% bonus on first deposit up to £50 & 50 Bonus Spins (30 spins on day 1, 10 on day 2, 10 on day 3) for Rich Wilde and the Book of Dead slot only. Min first deposit of £10. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply  Further Terms Apply #ad
  12. Fever Slots
    4/5
    Based on our expert’s review. Reviewed by
    Up to 500 Free Spins On Starburst
    2,500+ Slots
    24 Hours on Average
    UK Licence: 39175

    • Fun Loyalty Program
    • Plenty of Existing Customer Bonuses
    • A-Z Slot Sorting
    Providers:
    4theplayer
    hacksaw-gaming
    netent
    nolimit-city
    play-n-go
    pragmatic-play
    Payments:
    debit-cards
    neteller
    pay-by-mobile
    paypal
    paysafecard
    skrill
    T&Cs Apply New players only, £10 min fund, Free spins won via mega reel, 65x bonus wagering requirements, max bonus conversion to real funds equal to lifetime deposits (up to £250). Full T&Cs apply #ad
  13. Regal Wins Casino
    4/5
    Based on our expert’s review. Reviewed by
    100% up to £300 + 50 Free Spins
    800+ Slots
    10 Minute Cashouts
    UK Licence: 39022

    • Loyalty Program
    • Fast Payouts
    • Invite Only Bonuses
    Providers:
    microgaming
    netent
    novomatic
    play-n-go
    playtech
    Payments:
    apple-pay
    debit-cards
    paypal
    paysafecard
    T&Cs Apply 1st dep. of £20-£300, max bonus £300 on selected slots; 50x wagering on the sum of deposit & bonus applies. Max convertible 5x bonus amount received. Free Spins: Use code: REGAL when depositing in the cashier. 5 Batches of 10 FS Daily. Winnings capped at £10 per batch. T&C’s Apply.18+; Play Responsibly! www.begambleaware.org #ad
  14. NetBet Casino
    4.5/5
    Based on our expert’s review. Reviewed by
    20 No Deposit Free Spins + up to 500 Free Spins
    3,000+ Slots
    Under 24 Hours
    UK Licence: 39170

    • iOS + Android Mobile Apps
    • Players Club (Loyalty)
    • UK focused operation
    Providers:
    microgaming
    netent
    novomatic
    play-n-go
    playtech
    pragmatic-play
    Payments:
    apple-pay
    boku
    debit-cards
    g-pay
    paypal
    trustly
    T&Cs Apply 18+. New UK certified players | Valid mobile number required | No minimum deposit | 20 Book of Dead spins allocated | 40 times wagering on winnings | Ends 30.06.24 | T&Cs apply #ad
  15. BetMGM Casino
    4.1/5
    Based on our expert’s review. Reviewed by
    Up to £200 + 100 Wager Free Spins
    2,000+ Slots
    Average 24-48 Hours
    UK Licence: 39198

    • Loyalty Program
    • PayPal & Apple Pay
    • 24/7 Support
    Providers:
    4theplayer
    hacksaw-gaming
    netent
    nolimit-city
    play-n-go
    relax-gaming
    Payments:
    apple-pay
    debit-cards
    paypal
    T&Cs Apply ustomers only. Opt in & deposit £10+ within 7 days & wager 35x to get up to £100. Wagering contributions vary. 7 day expiry. Receive 10 – 50 Free Spins worth 10p on Big Bass Splash. 3 day expiry. Eligible on 2 deposits. 18+ Play responsibly. BeGambleAware.org #ad

Best UK Slot Bonuses in 2023 Ranked

Below at the best UK slots bonus offers. Our team here at Online-Slot.co.uk have claimed 100s of slot bonuses over the years so we know exactly what to look for. We’ve broken down the top offers by category using our tried and tested evaluation process.

Before we look at how we rate slot sites, below are our top choices for the best UK slot sites. Our experts at Online-Slot.co.uk will look at the good, the bad and the ugly to give you comprehensive and unbiased reviews.

🎁 Best UK Slots Bonus 2024 Mr Vegas Casino
🎁 Top Free Spins Slot Bonus PlayOJO Casino
🎁 Best No Deposit Slot Bonus PokerStars Casino
🎁 No Wagering Slots Bonus MrQ Casino
🎁 Weekly Slot Bonuses Fun Casino
🎁 Cashback Slot Bonuses Duelz Casino
🎁 NetEnt Slots Bonus Party Casino
🎁 Play ‘n GO Slots Bonus Casushi Casino
🎁 Pragmatic Play Slots Bonus Jackpot Casino
🎁 Playtech Slots Bonus Casumo Casino

#1 Mr Vegas Casino: Best Slots Welcome Bonus 2024

mr-vegas-casino-best-uk-slots-bonus

  • 100% slots bonus up to £400
  • + 150 Starburst welcome spins

Positives: Our number 1 UK slots bonus is from Mr Vegas Casino. With over 4,000 online slots to choose from, Online-Slot.co.uk readers are treated to an exclusive offer. Deposit £10+ to get a 100% match bonus up to £400! You will also receive 150 free spins on NetEnt’s Starburst.

Wagering requirements for the bonus are 20x whilst the free spins wagering requirements are 25x. You can also use any payment method, including PayPal, to avail this exclusive bonus. When you withdraw, expect your cashouts within 12 to 24 hours with no fees. What more could you want?

Negatives: With no dedicated iOS or Android apps (play through your smartphone’s browser), the Mr Vegas website looks a little dated even though it’s easy to navigate. There is no FAQs section on their site which is a minor grumble.

Our Verdict: There is no UK site that offers a top slots bonus like this. It includes a very high bonus of up to £400 plus free spins on one of the most popular slot games in Starburst. Finally, the wagering requirements are very low compared to other slot site offers.

#2 PlayOJO Casino: Top Free Spins Slot Bonus

playojo-casino-top-free-spins-slot-bonus

  • Exclusive 80 Book of Dead no wager free spins

Positives: PlayOJO Casino is a no wager slot site and this begins with their exclusive welcome offer. Available to Online-Slot.co.uk readers, there are 80 Book of Dead free spins when you deposit £10+. You’ll get 50 free spins right away and 30 more when you head to the Kickers section. There are no wagering requirements or max cashout limits either.

Offering more than 3,000 slot games from the top providers like Relax Gaming, Play ‘n GO and Pragmatic Play, you can enjoy this generous portfolio of slots in your browser as well as iOS and Android mobile apps. With payment methods like PayPal and Apple Pay, cashouts are free and quick (within 24 hours). PlayOJO also gives you free cash every time you play with OJOPlus.

Negatives: There are only 6 payment methods available with no Google Pay and Trustly. Being pick, they have no Playtech slot games.

Our Verdict: PlayOJO Casino offers a top free spins slots bonus which requires a £10 deposit. Available on the popular Book of Dead by Play ‘n GO, the no wager slot site has no wagering requirements on any promotions or offers, ever.

#3 PokerStars Casino: Best No Deposit Slot Bonus

pokerstars-casino-best-no-deposit-slot-bonus

  • Exclusive 100 no deposit free spins
  • 100% welcome bonus up to £200 (code: FIRST200)

Positives: Exclusive to Online-Slot.co.uk, sign up to get 100 no deposit free spins (20 within 30 minutes, 20 within 36 hours and 60 within 72 hours). What is even better is that this no deposit slots bonus has no wagering requirements or cashout limit. When you make your maiden deposit using code FIRST200, you’ll get a 100% bonus up to £200. Deposit £20-£200 to get a 100% match bonus.

With 2,500+ slot games, PokerStars Casino boasts lots of exclusive releases, especially from Pragmatic Play. Available on mobile apps, they have a wide range of payment methods (PayPal, Apple Pay and Google Pay) as well as under 1 hour e-wallet cashouts.

Negatives: Whilst the welcome offer is great, you can only use a debit card to claim the exclusive bonus. There is also no full portfolio of Novomatic slots.

Our Verdict: No deposit slot bonuses are rare these days but we’ve teamed up with PokerStars Casino to offer you this exclusive offer. Coupled with a generous welcome bonus, the reputable UK site has so many slot games including exclusively-produced titles. Playable on iOS and Android mobile apps, cashouts are very fast with lots of payment methods available.

#4 MrQ Casino: No Wagering Slots Bonus

mrq-casino-no-wagering-slots-bonus

  • 30 no wager free spins
  • Bonus code: SPLASH30

Positives: MrQ Casino offers UK players with a no wagering slots bonus. Deposit £10 using the promo code SPLASH30 to get 30 free spins on Pragmatic Play’s Big Bass Splash slot. With no wagering requirements and max cashout limits, there is no wagering on all offers and promotions.

Offering 1,000+ slot games from the top providers, MrQ is a high payout slot site with the best RTP rate on all their slot games. Playable on iOS and Android apps, there’s an abundance of payment methods (including PayPal and Pay by Mobile) with cashouts within 24 hours.

Negatives: Other slot sites offer more online slots with more jackpot games available elsewhere. There is are no Playtech or Yggdrasil Gaming slot games, unfortunately.

Our Verdict: MrQ Casino offer you a simple website which is available on dedicated mobile apps. Guaranteeing the best RTP rates on all slots, there are no wagering requirements on all slots bonuses.

#5 Fun Casino: Weekly Slot Bonuses

fun-casino-weekly-slot-bonuses

  • 100% bonus up to £123
  • Weekly reload bonuses + bonus spins every Friday

Positives: Fun Casino is a reputable UK slots site which welcomes new players with a 100% bonus up to £123. They have a Fun Friday promotion every week where there are reload slot bonuses and bonus spins up for grabs. On top of this, they are fun spins and no deposit offers for existing customers.

With more than 1,300 online slots, there are slot tournaments available. With a wide range of payment options, you can use PayPal, MuchBetter and Trustly amongst others. Cashouts are within 1 working day but processed much quicker normally.

Negatives: The minimum withdrawal is £20 across the board. In terms of slot games, you won’t find Playtech, Quickspin or Push Gaming titles.

Our Verdict: Fun Casino is a trusted site with weekly slot bonuses in the form of reload bonuses and bonus spins. Focusing on slot tournaments, they offer you the most popular payment methods with cashouts processed within 24 hours.

#6 Duelz Casino: Cashback Slot Bonuses

duelz-casino-cashback-slot-bonuses

  • 100% bonus up to £100 + 100 Book of Dead free spins
  • 10% weekly cashback every Friday

Positives: Duelz Casino welcomes new UK players with a 100% bonus up to £100 plus 100 free spins on Play ‘n GO’s Book of Dead. More importantly, they offer cashback slot bonuses in form of 10% weekly cashback every Friday. With cash tournaments every 15 minutes, you can take on other players with Duelz Prizes which are free to take part in.

With over 1,000 slot games from the best providers, they have lots of payment methods. However, where Duelz stands out is that they offer 6 minute average cashouts, with no fees.

Negatives: The minimum deposit is £20 and there are no iOS or Android mobile apps. Furthermore, their slots portfolio isn’t the biggest compared to other UK slot sites.

Our Verdict: Duelz Casino is a top slots site and for good reason. With a solid welcome offer which includes a bonus and Book of Dead free spins, your loyalty is rewarded with 10% weekly cashback every Friday. There are free slot tournaments, Duelz Prizes and instant withdrawals.

#7 Party Casino: NetEnt Slots Bonus

party-casino-netent-slots-bonus

  • Exclusive 120 free spins on NetEnt’s Starburst

Positives: Party Casino has a top NetEnt slots bonus for Online-Slot.co.uk readers. This consists of 120 free spins on the Starburst slot (NetEnt’s most popular game). All you need to do is deposit £10+ using a debit card, Apple Pay or PayPal. With slot tournaments, Party Jackpots and cashback, there is a loyalty programme via their Party Prizes wheel.

With a huge slots portfolio that is 3,800+ strong, they have more than 165 exclusive slots from top providers. Boasting iOS and Android mobile apps, you have many payment methods to choose from including £5 Apple Pay and Google Pay deposits. Cashouts are very quick too and practically instant.

Negatives: All payment methods are not valid for the exclusive slots bonus and you cannot search through their extensive slots library by slot provider.

Our Verdict: The UK-focused Party Casino has a top slot bonus on NetEnt’s Starburst. With so many slot games, you can play on dedicated mobile apps. Cashing out is a doddle with lots of payment methods and instant withdrawals the cherry on top of the cake.

#8 Casushi Casino: Play ‘n GO Slots Bonus

casushi-casino-play-n-go-slots-bonus

  • 100% bonus up to £50
  • + 50 bonus spins on Play ‘n GO’s Book of Dead

Positives: Operating in the UK for 10+ years, Casushi Casino welcomes new players with a 100% bonus up to £50. Once you deposit, you will get a Play ‘n GO slot bonus of 50 Book of Dead bonus spins. Existing customers can climb aboard the Sushi Train which is their excellent loyalty programme. Points will lead to Bonus Spins which can be used on popular slot games, including Play ‘n GO ones.

With more than 1,000 slot games, they have more than 70 progressive jackpot games. There is a search function by slot provider making it easy to find your favourite games. Withdrawals are free and quick with a wide range of payment methods including PayPal and Trustly.

Negatives: With no slots from Push Gaming, Playtech or Blueprint Gaming, they don’t have mobile payment methods such as Google Pay and Apple Pay.

Our Verdict: Casushi Casino is our overall top-rated slot site in the UK. Their welcome offer comprises on both a deposit bonus and Play ‘n GO free spins.

#9 Jackpot Casino: Pragmatic Play Slots Bonus

jackpot-casino-pragmatic-play-slots-bonus

  • Exclusive 50 No Wager Spins on Pragmatic Play’s Bigger Bass Bonanza

Positives: Jackpot Casino’s welcome offer comprises of a Pragmatic Play slots bonus with 50 no wager free spins on the Bigger Bass Bonanza slot. Just deposit and play £15 or more. The max cashout is £100 and you need to make the deposit in 1 go.

With a full selection of Playtech slots, they have a UK-based customer support team. Free withdrawals and 24 hour cashouts are on offer too.

Negatives: There are no iOS and Android mobile apps and they don’t offer a full allocation of NetEnt and Microgaming slot games.

Our Verdict: Jackpot Casino is a simple but great UK slot site with a good selection of slots. With an exclusive offer for Online-Slot.co.uk readers, they conduct themselves appropriately with free and quick cashouts.

#10 Casumo Casino: Playtech Slots Bonus

casumo-casino-playtech-slots-bonus

  • 100% bonus up to £100
  • + 20 bonus spins (Playtech’s Sahara Riches Cash Collect)

Positives: Founded in 2012, Casumo Casino welcomes UK players with a generous 100% slots bonus up to £100. Once you deposit, you will get 20 bonus spins on Playtech’s Sahara Riches Cash Collect slot. The bonus and bonus spins come with 30 x wagering requirements too. You’ll find jackpots on their most popular slots as well as slot tournaments that awards £1.4 million annually.

Boasting 2,100+ online slots, they have all Playtech games. Available to play on iOS and Android mobile apps, there’s a vast selection of jackpot slots (140+). With instant cashouts with no fees from all the most popular payment methods like PayPal and Apple Pay, they are trusted in the UK amongst slot players.

Negatives: Casumo could add some more payment options (like Google Pay) as well as free telephone support for UK players.

Our Verdict: Casumo is a great place to play if you’re a slots player. With a huge selection of games, they are our top mobile slot site with iOS and Android apps. Cashouts are free and fast too.

How we Evaluate the Best Slots Bonuses

evaluating-the-best-slot-bonuses

With all sites offering online slot bonuses, it’s hard to identify which are the best on show. We’ve done the hard work here at Online-Slot.co.uk with our criteria outlined below.

You’ll find the factors we considered when ranking the bonuses including wagering requirements, game restrictions and all terms and conditions. Hopefully, our extensive list below will become your go-to guide for finding the best slot bonuses:

  1. UKGC License and Safety: First and foremost, we check if the slot site offering the bonus has a UKGC licence and if it’s trustworthy. For some slot site bonuses we can consult user reviews and feedback, whilst others we need to dig a little deeper. This is often the case with new slot sites. In those cases, we look at the company owners and more.
  2. Wagering Requirements: With more no wager offers available these days (in the form of no wager free spins), most bonuses have wagering requirements. They are the number of times you need to play through a bonus before it’s available to be withdrawn. With the standard being 35 x deposit plus bonus, you would need to wager/bet the bonus plus deposit amounts 35 times to cash out the bonus and any winnings.
  3. Game Restrictions: slots bonuses can normally be used on 1 particular slot game (like Book of Dead or Starburst) or a group of slots (i.e. on NetEnt slots). Furthermore, some slot games may only contribute 50% or less to the wagering requirements. Slots with high RTP rates and jackpot slots tend to be excluded from wagering requirements altogether.
  4. Deposit Limits: Even the best slots welcome bonus with no wagering will come with deposit limits. The minimum deposit is normally £10 but can be up to £20 in order to qualify. You will also find a maximum deposit limit which will give you the maximum slots bonus (i.e. deposit £100 to get a 100% match bonus of £100).
  5. Time Limits: All slot bonus offers will come with expiry dates or time limits. Some will require you to deposit or avail the bonus within 24 hours, 3 days or even 30 days. This may also apply to wagering requirements which need to be completed in the specified timeframe.
  6. Maximum Cashout Limits: Also known as maximum payouts, some bonuses will have a maximum limit of what you can win with the bonus or free spins. This is put in place to limit the site’s liability. The best deposit slots bonuses don’t have any restrictions though.
  7. Payment Methods: A lot more common than some of factors outlined above, slot sites will allow you to claim a bonus but only if you use a certain payment method. Debit cards are allowed for all slot bonuses as a rule of thumb with PayPal being valid on many. Other e-wallet solutions like Neteller and Skrill are normally restricted for any welcome offers.
  8. Bonus Codes: With exclusive slot bonuses, a way for players to claim these offers is via bonus or promo codes. You need to enter the specified code when you register an account or make your first deposit. This is stated in all our reviews where applicable. That said, most codes are automatically populated where needed.
  9. Terms and Conditions: The fine print encompasses all factors outlined above. As per the Competition and Markets Authority’s guidance, the “terms and conditions of promotions should be clear and given to you in good time”. This includes any restrictions on how to use the slots bonus.

As a rule of thumb, the best slot bonuses should display transparent and detailed Terms and Conditions. Even though we specify all the ins and outs in our detailed reviews, make sure to check a particular site’s T&Cs before claiming any offer. If in doubt, contact their customer support teams for further clarification.

Types of Online Slot Bonuses

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There are various types of slot bonuses in the UK available, each offering its own set of benefits and advantages. Top slot sites will open their doors with a competitive offer and continue to offer their customers a wide range of bonuses to keep them happy. Below are the main ones you’ll come across with an explanation of each:

Welcome Bonuses

Also known as a slots sign up bonus or deposit bonus, most offers are a 100% match bonus up to a certain amount (normally £100). For a 100% welcome bonus up to £100: if you deposited £100, you’d get a £100 bonus.

This means the site will match you deposit amount with a bonus of the same amount. Once you complete the wagering requirements, the bonus will be available to cashout, as well as any winnings.

Some slot sites will spread welcome offers over 2 more deposits so the headline figure may be higher than you’d get on your first deposit. The better offers are 200% slots bonuses but the top bonus figure tends to be lower than 100% bonuses.

No Deposit Bonuses

A no deposit slots bonus is very sought after as you don’t need to deposit any funds when you try your luck at a UK slots site. Most no deposit bonuses tend to be small ranging from £5 up to £20.

However, there will be certain restrictions like high wagering requirements, eligible slot games and maximum win limits. Don’t be alarmed if a certain no deposit bonus isn’t valid from one week to the next as they are used sparingly and for mainly trial purposes.

Free Spins

More common these days, free spins bonuses require you to make a deposit to receive a certain number of free spins. These are valid on 1 slot game usually with the usual suspects Book of Dead (Play ‘n GO) or Starburst (NetEnt) to eligible slots.

No Deposit Free Spins

Like no deposit bonuses, no deposit free spins will give you free spins on a certain game without having to deposit any of your own funds.

Again available on the most popular slots, depositing £10 will normally give you around 50 free spins. These will inevitably come with high wagering requirements and max cashout limits.

No Wager Free Spins

No wager free spins are free spins that come with no wagering requirements. This means that any winnings are yours to keep and withdraw. Becoming increasingly popular in recent times, they tend to be offered by the top slot sites.

They also offer a small amount of wager-free spins (i.e. 10 or 20). Again, they will be available on slots like Starburst, Book of Dead or Big Bass Splash (Pragmatic Play). Check out our list of no wager free spins offers from top UK sites.

Reload Bonuses

Like welcome bonuses, reload bonuses will give you a matched amount up to a certain figure. Slot sites will use these to encourage existing players to try a new slot game or in order to get you playing again.

Used as a reward, reload bonus offers will normally require a bonus or promo code. One advantage with these kind of offers is they tend to offer lower wagering requirements compared to welcome bonuses. The best slot sites will offer monthly, weekly or even daily reload bonuses.

Cashback Bonuses

Less common these days, cashback bonuses will see you receive a percentage of your losses or play over a pre-defined period of time. Normally awarded weekly or monthly, you will get up to 20% of your losses as way of rewarding your loyalty.

If you take Duelz Casino, UK players receive 10% cashback every week, on a Friday. Party Casino give you 0.25% cashback on slots and 0.5% cashback on progressive jackpot slots even if you win or lose.

Loyalty Bonuses

Finally, loyalty bonus offers vary in format. They can be deposit or no deposit bonuses, free spins, no deposit or no wager free spins and cashback. Most of these offers will depend on how much a customer plays. If you were to lose £1,000 a month for example, you’d receive lots of loyalty offers whilst playing and losing £20 will likely get you nothing.

Slot sites will have VIP tiers or a ranking system where the rewards are greater the higher up you go. This can include other benefits such as birthday bonuses, gifts, tickets to sporting events and quicker cashouts.

 

Best Slots to Play with Slot Bonuses

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With slot bonuses being focused on slot games, you’ll notice that the various types of bonus offers are valid on the same online slots. For example, a slots welcome bonus will normally involve Book of Dead or Starburst whilst free spins slot bonuses are valid on a range of Pragmatic Play slots. Here’s a look at the top slot games you’ll play with slots offers:

Book of Dead (Play ‘n GO)

One of the internet’s most popular games, Book of Dead has been ever present in sites’ slots bonuses since its launch in 2014. With Play ‘n GO offering the functionality to give away free spins on their flagship game, many slot sites will offer 10 to 20 free spins on this ancient Egyptian favourite.

With 5 reels and 10 paylines, it’s all about the Free Spins feature where a special expanding symbol will take over reels. If you get a high-value symbol on enough reels, you can land payouts of up to 5,000 times your total bet on every free spin.

Starburst (NetEnt)

Released in 2012, the Starburst slot from NetEnt is also a popular choice for players and online slots sites alike. This outer space-themed game is played with 5 reels and 10 paylines from just 10p per spin. Mesmerising graphically with simple gameplay, the focus is on Starburst Wilds.

When they land on any of the 3 middle reels, they expand to give you a wild reel which then triggers a free respin. This can lead to 3 fully wild reels which can result in 500 times bet payouts per respin.

Big Bass Splash (Pragmatic Play)

The fishing-themed slot from Pragmatic Play has featured in various slot welcome bonuses lately. Big Bass Splash is a 5 reel, 10 payline game that, you guessed it, focuses on the Free Spins feature. With lots of modifiers available landing fisherman wilds and fish money symbols will result in cash prizes.

Playable from 10p a spin on all devices, Big Bass Splash comes with a high RTP rate of 96.71% and max wins of 5,000 times your total bet. It’s also one of the best ‘Big Bass’ slots from Pragmatic Play’s popular series.

Age of the Gods (Playtech)

The Age of the Gods slot is Playtech’s flagship game and has a Greek mythology theme. With 5 reels and 20 paylines, it comes with plenty of bonus features. This includes 4 free spins features each based on a god. They offer multipliers up to 5x, up to 5 wilds on each free spin, expanding wilds and increasing multipliers. This can lead to 50,000 times bet payouts on each free spin.

There’s also the small matter of 4 progressive jackpots. The Ultimate Power Jackpot pays out an average of £488,000 every 40 days with the biggest win £852,000.

Slot Bonuses Summary

Claiming slot site bonuses is actually quite straightforward. Hopefully, our ultimate guide to the best slots bonuses online has been comprehensive and simple enough to understand. The key is to claim offers from UKGC-licensed sites that prominently and clearly display all the relevant terms and conditions.

This page will be updated regularly with the latest information. Finally, remember that playing slots online for real money is only available to those 18 or over and may be illegal in your country or jurisdiction.

FAQs

What is a slots bonus?

A slots bonus is an incentive a slot site offers to new or existing players as a way of rewarding them. The most common is a slots welcome bonus when a new player joins.

What is a free spins slots bonus?

A free spins bonus is an incentive used by sites where you get a certain amount of free spins on a particular slot game. They are normally valid on Book of Dead (Play ‘n GO) and Starburst (NetEnt).

How do I find the best slots bonuses in the UK?

Check out our list of the best UK slot bonuses which are all from UK-licensed sites. They’ve been carefully vetted using our selection criteria.

What types of slot bonuses are there?

Slot sites offer many types of slot bonuses. They include welcome, deposit, no deposit, reload, cashback and loyalty bonuses as well as free spins which can be no deposit and no wager. A combination of various types will constitute a solid offering.

What should I consider for slot bonuses?

As with all casino and slots bonus offers, you need to consider wagering requirements, game restrictions, deposit limits, time limits, max cashout limits, payment methods, bonus codes and Terms & Conditions. Check out our How we Evaluate the Best Slots Bonuses section for more details.

Which slot games have the best bonuses?

Slot bonuses in the UK tend to be on popular slot games such as Starburst (NetEnt), Book of Dead (Play ‘n GO), Big Bass Splash (Pragmatic Play) and Age of the Gods (Playtech).

Author
Chris Taylor
Review by
Last updated: May 07, 2024

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