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400 Casino Bonus UK Casinos

Are you looking for quality casinos with the best casino bonus? You’re in the right place if what you’re looking for is a 400% casino bonus or one that offers up to £400 in bonus funds.

Naturally, we’ll explain how these promotions work and what they have to offer. You’ll also learn why you should choose a 400 bonus casino and list both of its pros and cons.

List of All 400% Deposit Bonus Casino Sites

Unfortunately, there aren’t a lot of 400 bonus casino UK sites out there. For one, this type of bonus is not as common as a 200% deposit bonus or another kind of offer promising lower amounts. It’s simply too big and covers so much cash that not all casinos can afford to offer it.

This is why we went above and beyond, checking countless UK and non-UK casinos that accept UK-based players to find the ones with this bonus. You can find the results of our hard work below.

Casino
Rating
Reasons to Join
Bonus and Code
4.2 / 5
  • Accepts cryptocurrencies
  • Not on Gamstop
  • Five-part casino welcome bonus
  • Accepts cryptocurrencies
  • Not on Gamstop
  • Five-part casino welcome bonus
4.2 / 5
  • Not committed to Gamstop
  • Gambling with credit cards
  • Swift & neat KYC verification
  • Not committed to Gamstop
  • Gambling with credit cards
  • Swift & neat KYC verification
4.7 / 5
  • Non-Gamstop
  • Curacao license
  • Accepts credit cards and Bitcoin
  • Non-Gamstop
  • Curacao license
  • Accepts credit cards and Bitcoin
4.1 / 5
  • Not on Gamstop
  • Credit cards allowed
  • Simple verification
  • Not on Gamstop
  • Credit cards allowed
  • Simple verification
4.2 / 5
  • Not on Gamstop
  • Payments with credit card
  • Swift KYC process
  • Not on Gamstop
  • Payments with credit card
  • Swift KYC process
4.8 / 5
  • Curacao license
  • Accepts cryptocurrencies
  • 3.000+ games
  • Curacao license
  • Accepts cryptocurrencies
  • 3.000+ games
4.6 / 5
  • Not part of Gamstop
  • 190+ table games
  • Great welcome bonus
  • Not part of Gamstop
  • 190+ table games
  • Great welcome bonus
4.2 / 5
  • Credit cards allowed
  • Not part of Gamstop
  • 35+ live tables
  • Credit cards allowed
  • Not part of Gamstop
  • 35+ live tables
4.6 / 5
  • Not part of Gamstop
  • 90+ providers
  • 4000+ Games
  • Not part of Gamstop
  • 90+ providers
  • 4000+ Games
4.3 / 5
  • No-Gamstop casino
  • Accepts credit cards
  • Accepts cryptocurrencies
  • No-Gamstop casino
  • Accepts credit cards
  • Accepts cryptocurrencies
4.5 / 5
  • Up to 725 free spins
  • Slots & lottery competitions
  • Open to the UK
  • Up to 725 free spins
  • Slots & lottery competitions
  • Open to the UK
4.3 / 5
  • 475% bonus on first deposits
  • Weekly prizes
  • Free spins
  • 475% bonus on first deposits
  • Weekly prizes
  • Free spins
4.1 / 5
  • Huge selection of games
  • Dedicated sportsbook
  • Not on Gamstop
  • Huge selection of games
  • Dedicated sportsbook
  • Not on Gamstop
4.0 / 5
  • 90+ software providers
  • Fantastic 525% welcome package
  • 4000+ casino games
  • 90+ software providers
  • Fantastic 525% welcome package
  • 4000+ casino games
4.4 / 5
  • Not signed on Gamstop
  • Credit cards accepted
  • Simple verification process
  • Not signed on Gamstop
  • Credit cards accepted
  • Simple verification process
4.0 / 5
  • Not on Gamstop
  • Credit cards and crypto accepted
  • 4000+ games
  • Not on Gamstop
  • Credit cards and crypto accepted
  • 4000+ games
4.0 / 5
  • Not registered in Gamstop
  • Visa and Mastercard payments
  • Fast verification process
  • Not registered in Gamstop
  • Visa and Mastercard payments
  • Fast verification process
3.9 / 5
  • Is not part of Gamstop
  • Games from 90+ providers
  • Great welcome package
  • Is not part of Gamstop
  • Games from 90+ providers
  • Great welcome package