Best UK Online Casinos List 2021

Welcome to Bonusfinder UK - the most comprehensive real-money online casino & sports betting bonus guide for UK punters.

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Online casinos are sites where you can play real-money games online. You'll find the best online casino sites, no-deposit, and first deposit bonuses on Bonusfinder. We have amazing promotions for online slots, sports betting, and online bingo in Great Britain. We've listed all the best online casinos where UK players can play and compiled reviews of the bunch.

List of top casino sites that are safe and secure and give generous no deposit free spins and casino bonuses to casino players.

We found 55 bonuses worth £13,535
  • Captain Spins Casino Of the Month
    520 Bonus Spins
    For Book of Dead
    18+, new UK players only, be GambleAware.
    New players only. One welcome package per player. Max bonus bet £5, Min deposit £20 1st deposit: get 100 bonus spins, 2nd Deposit: get 120 bonus spins, 3rd deposit: get 140 bonus spins, 4th deposit: get 160 bonus spins. All spins are on slot game Book of Dead only. Bonus funds must be used within 30 days and bonus spins within 7 days. Max winnings from bonus spins are equivalent to the number of spins awarded. Spins winnings credited as bonus. Bonus funds separate to Cash funds, and are subject to 35x wagering and withdrawal requirements. Full Terms Apply BeGambleAware.org
  • Casino.com
    20 No-Deposit Spins
    For Age of Gods
    180 Bonus Spins
    For Age of the Gods
    £100 Bonus
    This bonus is 100% up to £100
    18+, new UK players only, be GambleAware.
    New customers. Spins: 20 on registration, 180 after deposit, winnings given as bonus funds, 20x wagering. Spins and bonus wagering on Age of the Gods 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. See T&C for details.
  • 50 Bonus Spins
    For Promotional games
    £300 Bonus
    This bonus is 100% up to £300
    18+, new UK players only, be GambleAware.
    Opt in required. New customers to Casino page only. 1x per customer. Min. Buy in £10. Bonus value 100% of Buy in. Max. Bonus £300. 40x Wagering, Max Redeemable £4,000. 50 Free Spins with x35 wagering will be awarded after the Buy in Bonus is completed, Max Redeemable £1,000. Bonus expires after 7 days. Stake contributions, player, country, currency, game restrictions and terms apply.
  • 300 Bonus Spins
    For Starburst, Finn and the Swirly Spin, Finn’s Golden Tavern
    Deposit between £10-£19.99 and you will get 100 Bonus Spins. Deposit £20-£49.99 and you will get 200 Bonus Spins.
    18+, new UK players only, be GambleAware.
    New players only. First deposit only. Min deposit £10. Min 100 bonus spins, max 300 bonus spins on selected slots only. 30x wagering. 4x conversion. T&C's Apply
  • 25 Bonus Spins
    For Millionaire Genie, Irish Riches, Pirates Millions or Rise of the Pharaohs
    £200 Bonus
    This bonus is 100% up to £200
    Use code SPINSON
    18+, new UK players only, be GambleAware. Full Terms Apply
    New players only • £20 min deposit, excluding deposits by Skrill or NETELLER • Get 100% up to £200 Bonus and 25 Free Spins [FS] • FS valid on selected games & expire in 14 days • FS wins credited in bonus • Bonus wins are capped at £500 • To withdraw bonus & related wins, wager 30 x (bonus amount) within 90 days • Wagering req. vary by game • This offer may not be combined with any other offer • Deposit balance is available for withdrawal at any time • General withdrawal restrictions & full T&Cs apply.
  • Zodiac Casino Recommended Bonus
    80 Bonus Spins
    For Mega Moolah
    £480 Bonus
    + 100% up to £100 + 50% up to £80 + 50% up to £150 + 50% up to £150
    18+, new UK players only, be GambleAware. Full Terms Apply
    The 80 chances are credited as a £20 signup bonus, and players can spin 80 times at £0.25 on the Mega Moolah progressive slot game. The minimum first deposit required is £1, and for all subsequent deposits the minimum deposit is £10. A sixty times wagering requirement applies on the first welcome bonus, and a thirty times wagering requirement applies on subsequent casino bonuses and certain games contribute a different percentage to the wagering requirement.
  • 10 No-Deposit Spins
    For Selected games
    50 Bonus Spins
    For Book of Dead
    £50 Bonus
    This bonus is 100% up to £50
    18+, new UK players only, be GambleAware. Full Terms Apply
    New customers only Min £10 dep. 100% up to £50 in Bonus. Neteller/Skrill excl. Max bonus £50. Wagering 40x on bonus amount within 30 days. Bonus max bet £5. Spins paid 10 per day on Book of Dead and valid for 24 hours. Game weighting and T&Cs apply.
  • Dr Slot
    20 No-Deposit Spins
    For Fire and Gold
    100 Bonus Spins
    For Fire and Gold
    £1,000 Bonus
    This bonus is 300% up to £50 + 200% up to £100 + 100% up to £200 + 100% up to £200 + 50% up to £450
    18+, new UK players only, be GambleAware. Full Terms Apply
    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. T&Cs apply, BeGambleAware.org
  • 500 Bonus Spins
    For Book of Dead
    18+, new UK players only, be GambleAware. Full Terms Apply
    18+. New players only. One welcome package per player. Max bonus bet £5, Min deposit £20, 1st deposit: get 100 bonus spins, 2nd Deposit: get 75 bonus spins, 3rd deposit: get 125 bonus spins, 4th deposit: get 50 bonus spins, 5th deposit: get 150 bonus spins. All spins are on slot game Book of Dead only. Bonus funds must be used within 30 days and bonus spins within 7 days. Spins winnings credited as bonus. Bonus funds separate to Cash funds, and are subject to 35x wagering and withdrawal requirements. Terms Apply. BeGambleAware.org.
  • Pokerstars Casino New Bonus
    50 Bonus Spins
    For Tomb of Ra Classic
    18+, new UK players only, be GambleAware.
  • Kerching
    150 Bonus Spins
    For Starburst, Aloha! Cluster Pays, Finn and the Swirly Spin
    £500 Bonus
    This bonus is 100% up to £100 + 50% up to £100 + 50% up to £300
    18+, new UK players only, be GambleAware. Full Terms Apply
    First 3 deposits only, Min deposit £10, max total bonus £500 & 150 spins, 30x wagering (dep + bonus), 30x on spins, 4x conversion, Bonus and spins valid on selected slots only, Full T&Cs apply.
  • £800 Bonus
    This bonus is 100% up to £200 + 50% up to £200 + 25% up to £200 + 25% up to £200
    18+, new UK players only, be GambleAware. Full Terms Apply
    New customers only. Opt-in required. 1st deposit bonus 100% up to £200. 2nd deposit bonus 50% up to £200, 3rd deposit bonus 25% up to £200, 4th deposit bonus 25% up to £200. Min deposit £10. 40x wagering, 30 days to complete wagering, eligibility, game weighting and game restrictions apply. Max Bet with bonus funds £5. Max withdrawal from bonus funds is £2000. Eligibility restrictions apply, cash balance can be withdrawn at any time. Full bonus terms apply
  • 50 Bonus Spins
    For Starburst
    Use code WELCOMEBONUS
    18+, new UK players only, be GambleAware.
    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
  • MrQ
    30 Bonus Spins
    For Valhalla
    Use code V30  No Wagering on Free Spins
    18+, new UK players only, be GambleAware. Full Terms Apply
    First deposit only. Min deposit & spend £10. Max 30 spins on VALHALLA at 25p per spin. Spins credited upon spend of £10. Full T&Cs apply.
  • 10 No-Deposit Spins
    For Book of Dead
    100 Bonus Spins
    + Book of Dead + Book of Dead + Book of Dead + Book of Dead
    £50 Bonus
    This bonus is 100% up to £50
    18+, new UK players only, be GambleAware. Full Terms Apply
    First deposit only. Minimum deposit £10. Maximum bonus £50. Wagering attached to bonus Is 25x. Maximum bet per spin while using a bonus £3.99. Bonus funds expire in 21 days. Game contributions to wagering vary. Please check T&C’s for more information. Standard bonus terms apply. Please gamble responsibly.
  • Casino 2020
    400 Bonus Spins
    For Cleopatra's Prizes
    £300 Bonus
    This bonus is 100% up to £100 + 200% up to £200
    Up to £20 welcome bonus & up to 20 free spins upon registration and verification
    18+, new UK players only, be GambleAware. Full Terms Apply
    Up to 400 (18p) free spins on first deposit, awarded over 20 days. Expires 00:00 daily. Locked to Cleopatra’s Prizes. 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. T&Cs apply. BeGambleAware.org
  • Pink Casino
    £10 No-Deposit Bonus
    10 Bonus Spins
    For Book of Dead
    £100 Bonus
    This bonus is 100% up to £50 + 100% up to £50
    18+, new UK players only, be GambleAware.
  • £150 Bonus
    This bonus is 150% up to £150
    18+, new UK players only, be GambleAware. Full Terms Apply
    New accounts only. Min. £10 deposit, debit card only. Up to 50x wagering, game contributions vary, max. stake applies, 7 day expiry. See full terms.
  • 50 Bonus Spins
    For Starburst
    £100 Bonus
    This bonus is 100% up to £100