Best Online Casino Bonus Codes April 2024

An online casino bonus code is a little key that can unlock great bonuses.  Like with an ordinary key when you have access to it, it is easy to unlock doors that might lead to great online casino fun and fabulous riches. Find out how you infuse more fun and excitement into your game with the help of online casino bonus code, why casino use these ‘keys’ and how you can get your hands on these casino bonus codes.

Play with £88 Free (no deposit) + 100% up to £140 Bonus on your 1st deposit
T&Cs apply
No Deposit Offer: Claim in 48 hrs • 14 day expiry • FP wins are credited as bonus and capped at £10, exc. JP win • 50x wagering • Deposit Offer: £20 min deposit • Claim in 48 hrs • Valid for selected games • Bonus wins capped at £500, excl. JP wins • Pre-1st deposit only: Bonus wins & max redeemable amount capped at £100, excl. JP wins • 30x wagering – req. vary by game • Bonus expires in 90 days • Payment method & country restrictions apply • Withdrawal terms, No Deposit Offer terms No Deposit Offer terms & Deposit Bonus Offer terms Deposit Bonus Offer terms apply apply. 18+ BeGambleAware
  • Great selection of games
  • Rotating daily bonuses
  • Good mobile apps
100% up to €/£300 with Free Spins
T&Cs apply
18+. New UK customers only. Opt-in required. 30 free spins on Book of Dead game upon registration with NO wagering requirements or deposit required for spins AND 100% deposit bonus up to €300: Min deposit €10 and 30x wagering requirements apply on bonus (game weighting applies). Max bet applies. T&C Apply.
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  • Substantial Bonuses
  • Persistent innovations in terms of mobile gaming
  • Live chat & 24/7 email support
Unlock up to £100 and 50 Free Spins on Big Bass
T&Cs apply
Casino Welcome offer
+18 Significant terms:

Full 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. 18+

  • 24/7 Customer Support
  • Fast Withdrawals
  • Won numerous prestigious awards
100 % up to €200 +100 free spins
T&Cs apply
18 +. 1st Deposit Bonus for new players only. If you're a new player a minimum deposit of £10 is required.
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  • Loyalty program
  • Variety of games & Live casino
  • 24/7 Customer Support
100% up to €/£300

New players only, min deposit £10, wagering 45x, max bet £5 with bonus funds, 100% up to £100 bonus on 1st deposit, 50% up to £200 on 2nd deposit. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Full T&C’s apply

T&Cs apply
1st deposit bonus.100% match bonus up to £/€/$ 100 on first deposit. Second deposit bonus 50% match bonus up to £/€/$ 200 on second deposit. A minimum deposit of £/€/$ 10 is required. Maximum bonus offered will be communicated in the details of each specific promo.

The welcome bonus is available to players from the following countries: United Kingdom, Austria, Canada, Germany, Ireland, Norway, India, New Zealand, South Africa and Switzerland. Unless other rules are specified, bonuses are valid for 30 days and are subject to the X45 wager requirement.

Slots and Other Games apply towards the wagering requirement. Table games, Video Poker and Live Casino do not count towards the wagering requirements. Bonuses cannot be used in the Live Casino. Bonus Terms Apply
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  • Nice live casino of more than 100 games
  • Excellent welcome bonus: €/£300
  • Always 10% cashback with 0x wagering requirement

What is an online casino bonus code?

An online casino bonus code is a word or phrase consisting of a word with a or several numbers or a combination of letter and numbers. When you use a particular code when signing up at an online casino and/ or making your first deposit it gives you access to a certain bonus, either a no deposit or deposit bonus or both. You can compare it to a password that gives you access to a certain device, app or location. You have no deposit bonus codes and bonus codes you can apply to claim a bonus on top of your deposit.

Why do online casinos use these bonus codes?

Online casino bonus codes are an easy way for an online casino to organise different bonuses in one system. When you apply a casino bonus code linked to a certain bonus when you register a new account or make a deposit, the payment system at the online casino immediately knows which bonus to credit to your account. Bonus codes are also used to keep a bonus exclusive. Online casinos make exclusive deals with certain websites and influencers or want to offer exclusive deals in their communications with players in their newsletters or on their social media page. With an exclusive online casino bonus code, you can get something extra most other players don’t have access to.

Why are online casino bonus codes useful?

An online casino bonus code can be most useful as it gives you access to a bonus of any type, whether a deposit bonus or a bonus for which you don’t need to make a deposit. In quite a few cases a bonus code gives you access to an exclusive bonus that is not available to the majority of players. No deposit bonus casino codes can give you access to great deals you receive when you sign up at a new online casino or just log on to your account. As you can guess from the name, with no deposit bonus casino codes you can claim great treats for which you don’t need to make a deposit.

How do I get access to these online casino bonus codes?

Sometimes it is easy to get your hands on an online casino bonus code. These codes may be published on the online casino website or otherwise widely available. On other occasions it pays to keep an eye on communications from online casinos in the form of email or SMS. On some occasions an account manager can contact you offering an attractive bonus, which you can only access with a bonus code. You can also follow online casinos on social media to get access to great deals for which you need a bonus code.


An online casino bonus code can give access to all types to all sorts of bonuses. A bonus codes works a bit like a key as it can unlock a great bonus for which you don’t have to make a deposit or an extra treat when you fuel your account. A bonus code can be a simple a word, a word with a few numbers or a phrase that is a combination of letters and numbers. Online casino bonus codes are used to make it easier for online casinos to allocate bonuses to their players. These bonus codes are also used for exclusive bonuses that are not available to all players. You can find lucrative bonus codes by staying up to date with any promotional news through the online casino newsletter, social media pages and online casino forums, comparison websites and news outlets. An online casino bonus code can give you access to a fabulous exclusive bonus or sometimes it is the only way to claim a no deposit bonus or something extra on top of your deposit. Apply the casino bonus code on the registration page and/ or payment page to make sure to receive your bonus.

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How do you use online casino bonus codes?

Using online casino bonus codes is very simple. When you want to claim the bonus linked to the no deposit bonus casino code, make sure to fill it in on the registration form to claim a no deposit bonus. If the bonus code is linked to a deposit bonus, then don’t forget to quote the bonus code in the designated section it on the payment page of the online casino and apply. After you have made payment your bonus will be credited to your online casino account instantly unless stated otherwise.