400% Deposit Bonus on purple background

Find the Best 400% Deposit Bonuses at JohnSlots!

Finding the best deposit bonuses is easy with JohnSlots. Our team of experts are the dedicated gatekeepers of our recommendations list. They update it when they find a site that matches their rigorous criteria. Here’s how they do it:

Minimum Deposits – No matter your experience level at online casinos, you deserve a chance to start your online gaming journey without too many risks. Our top-rated casinos have a wide range of minimum depositing options for everyone.

Varied Bonus Amounts – We cater to casino players of all budgets by offering them a wide variety of match bonuses from standard 100% to huge 400% casino bonuses.

Eligible Games – We never judge a casino by its amount of games. With the right slots and other titles, a high quality 300+ games library can outperform a 1,000+ games lobby.

Wagering Requirements – Our casino experts will always point out if the wagering requirements are way too high and the bonus terms unreasonable.

  • Selling Point-1 Easy site navigation
  • Selling Point-2 Generous welcome bonus
  • Selling Point-3 Fast Payments


  • Selling Point-1 Classic slots
  • Selling Point-2 Easy registration
  • Selling Point-3 Editor's choice

100% Bonus up to 200 + 100 Free Spins

  • Selling Point-1 Suitable for mobile
  • Selling Point-2 Live Chat
  • Selling Point-3 Bingo and Slots

Bonus up to 70 Free Spins

  • Selling Point-1 Fast payouts
  • Selling Point-2 Tablegames
  • Selling Point-3 Mobile Casino

100% up to 200 + 30 Extra Spins

  • Selling Point-1 Live Casino
  • Selling Point-2 Live Casino Bonus
  • Selling Point-3 sports betting

Up to £100 Cash and 25 Free Spins

  • Selling Point-1 Free Spins
  • Selling Point-2 Live Casino
  • Selling Point-3 Jackpot slots

100% up to €1,000

  • Selling Point-1 Multiple Payment Methods
  • Selling Point-2 Cashback
  • Selling Point-3 Classic slots

100% Up to €150 + 250 Bonus Spins

  • Selling Point-1 Great offers & promotions
  • Selling Point-2 VIP
  • Selling Point-3 Live Casino


  • Selling Point-1 24/7 Support
  • Selling Point-2 Large selection of games
  • Selling Point-3 Tablegames

Up to 50 Bonus Spins on Starburst

400% Deposit Bonus on purple background

What Is a 400% Deposit Bonus?

A 400% deposit bonus is bonus money given to you as a new player for signing up with the casino. It boosts your bankroll by multiplying your initial deposit 5x. If you deposited £10 for a 400% bonus offer, you’d be able to play with £50.

With the extra bonus funds, you could play slots and table games. Sometimes, you can play live casino games with bonus money after you’ve used up your real money balance.

It’s a rare gift at any UK online casino. Therefore, it’s usually split up over multiple deposits, which you will have probably seen more often.

Why Choose a 400% Casino Bonus?

If you’re questioning whether a 400% deposit bonus is a good option for you, we’ve got three good reasons for claiming this monster of an offer:

  • Play for longer using your bonus money.
  • Use your match bonus to play slots, scratch cards, jackpots, roulette, blackjack, video poker and, at some casinos, even live dealer games.
  • Give yourself more chances to win.

How to Claim a 400% Bonus?

Whether you are claiming a 100% bonus offer or a 400% deposit offer, the process is pretty much the same at most casinos. Here are the necessary steps:

Clicking a bonus offer on a green background
  1. Find a casino that offers a 400% deposit bonus. You can browse our list for some ideas.
  2. Join the casino by creating a new account, and be sure to read the bonus terms.
  3. Register your preferred payment methods for depositing/withdrawals.
  4. Deposit at least the minimum required amount.
  5. If required, enter a promotional bonus code supplied by the casino.
  6. Activate your bonus by loading your chosen slot or table game in the games lobby.
  7. When the real money balance runs out, you can carry on playing with your bonus money.
  8. Had enough fun? Complete any wagering requirements to convert your bonus winnings into cash and go to the withdrawals page to claim your prize.

Eligibility for 400% Bonuses

There’s one more essential step to claiming your bonuses, and that’s checking the eligibility. This means that you should take note of the bonus terms included in the offer. The initial bonus advert will have all the significant terms, but you should also browse the full T&Cs to be fully prepared. Here’s what eligibility usually entails:

  • 18+ only – only players 18 years or older are allowed to play casino games and claim bonuses.
  • New UK players only – you’re only eligible for the welcome bonus if you are a UK resident and haven’t previously registered an account with the casino.
  • Verification needed for UK players – before allowing players to claim bonuses, some casinos require that you submit documentation confirming your identity and residential address beforehand.
  • E-wallets excluded – Due to the strict Gambling Commission regulations, some e-wallets like Skrill and Neteller, are not eligible for claiming bonuses. You can instead use bank cards or any other payments permitted to use by the casino.

400% Bonus – Only for New Players?

Incentives such as a 400% deposit bonus are usually available to new players only. However, that doesn’t mean that there isn’t anything else available for existing customers. As a loyal player, you can get:

  • Reload Bonuses
  • VIP Offers
  • Tournament & Competition Prizes

If you’re planning to return to a casino, check out their promotions page dedicated to fun affairs such as tournaments, various competitions and reload bonuses. The reload bonuses can be beneficial after you’ve used up your welcome bonus. They offer the second, third, fourth or even fifth chance at extending your gameplay and possibly winning again.

If you enjoy playing for real money and play more than one game at a time, checking out any VIP or rewards programs can be a good idea. Many casinos acknowledge their loyal customers with exclusive promotions and are more than happy to offer customised bonuses in return.

Wagering & Max Cashout on a 400% Bonus

Wagering & Max Cashout on a 200% bonus

The wagering and the max cashout is where this match bonus significantly differs from the smaller offers. Almost always, a bonus as big as 400% will have higher wagering requirements and a smaller max bonus compared to a 100% bonus. For example, the playthrough can be as high as 50x or more. While the max bonus money can be limited to about £40.

Whenever possible, look for casinos with higher winning limits and lower wagering requirements to get the most out of your bonuses.

Discover More Deposit Bonuses at JohnSlots!

Now that you know what to expect from a 400% bonus, you can start looking for these rarest of bonuses. We currently don’t have any UK casinos with this bonus, but we have plenty of other equally effective offers at the ready that could work just as well for you. Claim a 100% casino bonus or 200% deposit bonus and enjoy the play! Check back for regular updates!

What does John have to say?

In my opinion, a 400% deposit bonus, though rare, is an extraordinary find in the UK online casino landscape. When you come across one, it feels like striking gold because of the significant boost it gives your initial deposit, enhancing your playing time and chances to win big. However, it’s crucial to approach these bonuses cautiously due to potentially high wagering requirements that can sometimes accompany them.


Leonard Sosa

100% up to €300 + 25 Free Spins on Book of Dead

Visit Site See full T&Cs for more detail. 18+ Please Play Responsibly.

400% bonus is a rare find and not all casinos offer it.

Not all high bonuses are the best as they usually come with high wagering requirements.

+5 Years of Experience
Leonard Sosa - Casino Bonus Expert photo

Casino Bonus Expert

32 Articles

Leonard Sosa is a trusted Casino Bonus Expert with a deep understanding of the intricacies of online casino bonuses. He analyzes and evaluates the terms and conditions associated with different bonuses, guiding players to make informed decisions. Leonard specializes in no wager no deposit bonuses and provides valuable insights on maximizing their benefits. His expertise helps players unlock the true value of casino bonuses and optimize their gaming experience.

More info on Leonard Sosa arrow