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Author: Steve Ashwell, Last Updated: November 1th, 2021

400% First Deposit Bonus UK Casinos

The bigger the bonus, the more you can play. So if you’re looking for a 400% first deposit bonus, you’ve come to the right page. We’ve rounded up a whole bunch of platforms that are capable of giving such generous rewards.

We’ve made this ranking, so you don’t have to waste time looking for the platform you want. All of the gambling brands in it accept players from the UK. So if you are registered on the Gamstop register, you can still play casinos from our ranking!

We rank top platforms with high protection of customer data, with legal licenses and certificates. All games are certified by the vendors, which means their maths, RTP is 100% honest.

➡️ 400% Bonus Casinos List Updated: November 2021
➡️ Casinos are licensed and tested by independent gambling auditors eCOGRA ✅ iTech Labs ✅ Gaming Laboratories International

 

1
KaboomSlots
100%
TOTAL SCORE

450% Bonus for First Deposits ✅✅✅ New Highest-Quality Casino

Kaboom Slosts Not Connected To GamStop

18+ New players only begambleaware.org

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2
Pyramid-spins-casino
100%
TOTAL SCORE

Bonus 450% Deposit Package Up To €3000

Pyramid Spins Casino not Blocked by Gamstop

18+ New players only begambleaware.org

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3
admiral shark casino without gamstop
100%
TOTAL SCORE

450% Bonus Package Up to £3000

Admiral Shark Casino Not on Gamstop

18+ New players only begambleaware.org

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4
Capitan-marlin-casino
100%
TOTAL SCORE

Bonus 475% Up To €3000

Captain Marlin Casino Not Covered by Gamstop

18+ New players only begambleaware.org

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5
imgonline-com-ua-Resize-cKoTwCXn6f2b
100%
TOTAL SCORE

400% UP TO £1000

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6
Slots-Charm-Casino
100%
TOTAL SCORE

450% Bonuses Up To £3000 - €40 Min. Deposit

Slots Charm Casino Gamstop Free

18+ New players only begambleaware.org

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7
Mister X Casino Not Covered by Gamstop
100%
TOTAL SCORE

450% Bonus Package

Mister X Casino Non Gamstop

18+ New players only begambleaware.org

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8
Win-Diggers-Casino
100%
TOTAL SCORE

450% Promotion Package

Win Diggers Casino not Using Gamstop

18+ New players only begambleaware.org

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📌 Number of Сasinos With 400% Bonus8+
🏆 Best 400% Bonus CasinoKaboom Slots
🎯 Bonus400%
 Accepting Gamstop Players?Accept
💂 Accepting UK Players?Accept
⌛ Withdrawal Times15 min – 3 days
🔒 Safe and Legal YES – Licences
🎫 LicencesMalta Gaming License, Curaçao 
🎲 Accessible GamesSlots, Poker, Bingo, Roullete, Lottery
🎰 Type Gambling SitesCasino, Betting, Live Games

Best of 400% Casino Bonus Offers

Team experts pick on the 400 Casino Bonuses UK. Then, they research the gambling brands on their own: checking sites’ performance, customer support, quality and RTP of gaming products. We also carefully look for the T&C of advertised welcome bonuses.

400% first deposit bonus

Thus, the gambling brands with the high marks and nice website features make our ranking.

The Best Gambling Platforms from Our List:

TOP 5 Casinos With 400% Deposit Offer

We have selected dozens of platforms with a 400 casino bonus. But we want to draw your attention to the best websites to test first. So check them out, play some demos and decide whether or not you should stay with them.

Kaboom Slots

The platform has been up and running since September 2021. You can play casino products, lotteries, bet on sport games, esports. The minimum deposit is €40. Here you can earn a 400% welcome bonus and no dep prizes for registration (cash and free spins).

Pyramid Spins

An even bigger reward is available here – a 450% bonus on your first 3 deposits! The platform has been running since 2021 and offers many Egyptian-themed games. It hosts games created by more then 80 providers. The min deposit to activate the prize is €40.

Admiral Shark Casino

Here you will find more than 1000 gaming products from Playtech, NetEnt, Quickspin and other manufacturers. A deposit of €50 is required to activate your bonus.

Captain Marlin Casino

Another new brand launched in 2021. The brand specializes in slots, tables and live games. The newbie kit is divided into 3 deposits. The maximum you can get is €3,000. To activate the reward, you should to deposit 20 euros.

Black Magic Casino

The brand was launched in August 2021. The welcome bonus is 400% up to £1,000. The minimum deposit is £25. That platform operates following a Curacao licence and offers nearly 1,000 casino games.

Other cool bonuses to 400% Casino Promos

If this 400% casino bonus doesn’t meet your expectations in any way, you may check out the platform with other bonuses.

Check out these pages for ratings of quality platforms:

Major Sides of Brands Having 400% Bonus3

Without a doubt, the 400% deposit bonus is an offer for improving the gambling pastime Thanks to the increased cash and free spins, you can play more games or make bigger bets. Both improve your odds on winning!

In addition, platforms with these bonuses have several other benefits:

  • Operators operate independently of UK legislation.
  • Thanks to an international license, the platforms are well protected.
  • The games are available in Europe and the United Kingdom.
  • The platforms are not connected to Gamstop.
  • Thousands of quality games from well-known manufacturers.

Sites provide easy registration using the email address or social media accounts.

Minuses of Brands With 400% Deposit Match

Attractive casinos with 400% deposit slots bonuses have disadvantages:

  1. Some have significant wagers that are difficult to play.
  2. In addition, prizes can be sticky, meaning they cannot be withdrawn from your account. You can use them inside the casino.
  3. A limited set of payment systems.

Because the platforms operate under an international license and are not subject to a local regulator, legal issues can be strained.

Fast Answers to Questions

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Tell me, what's a 400% casino bonus?

It's a welcome bonus that you get for 1 or more initial deposits. That is, if you deposit €100, you get €400. So the sum at your disposal is 500 euros. Pay attention to the maximum amount of winnings from the bonus that you can withdraw from the site. That and other parameters can be found in the description.
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If I reside in the UK, can I get a 400% casino bonus?

We've gathered online casinos that offer rewards to all UK players. These international brands provide services to all residents of the country with no restrictions. Thanks to GamStop's no-registration scheme, you can play on these websites even if you are banned from other platforms.
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Tips to find sites with a 400% match?

The easiest way to find a site with a generous bonus is to check our ranking. We select the best platforms with the highest quality user experience.
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How to claim a 400% bonus several times?

You cannot claim multiple bonuses on the same gambling platform. But it is possible to register on several websites and get 1 bonus from each of them.
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What's the minimum sum to get a 400% bonus?

The minimum deposit depends on the conditions of the gaming platform. For example, some ask for £20, while others inflate the minimum to £50.
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Can players keep winnings when they earn a 400% bonus?

It depends on the requirements specified in the promotion. If you can meet the conditions and you still have winnings on your balance - then you can safely withdraw it to your card or wallet.
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