400% Deposit Welcome Bonus 2024

If you are searching for a massive casino bonus, then welcome to Casino Martini! Our expert team reviews and tests all casino bonuses to ensure you receive the most out of your opening deposits. Casino bonuses that offer up to 400% of a bonus amount have been favoured by punters since the birth of online gambling.

Having the ability to quadruple your deposited amount is exciting for both new and seasoned casino fanatics. These bonuses often come in the form of deposit match bonuses whereby a player can receive a percentage of their deposit back in bonus funds up to their 4th deposit. The percentage is often broken down, which allows players to wager for longer presenting more opportunities of winning big.

Our veteran research team comprised of gambling experts from all walks of life presents its comprehensive findings within the UK gambling industry. Once you are finished reading, you will be a 400% bonus expert ready to claim big and win even bigger!

100% Bonus up to £200 + 100 Bonus Spins
  • Live Chat
  • Mobile friendly games
  • Numerous payment options
Up to £300 Deposit Bonus + 100 Spins
  • New Casino
  • Quick Registration
  • Spin the wheel for bonus spins
Up To 1000% Match Bonus
  • UK gaming License
  • Many payment options
  • Home to a number of top gaming platforms
100% Up to £100+200 extra spins
  • Quick withdrawals
  • Accessible on any device
  • Excellent Customer Support
Up to £100 match bonus+ 200 Spins
  • Popular Jackpot Slots
  • Great Live Dealers
  • Well-optimized mobile-friendly site
Get up to £250
  • 1,500 games provided by top developers
  • Highly secured online gambling
  • Easy to use
100% Up to £100 + 100 Bonus Spins
  • Unlimited withdrawals
  • 0-24 hour withdrawal timeframes
  • Live chat is open 24/7
£100 Bonus + 300 Spins
  • New Casino!
  • A total of £1500 bonus
  • 18+ Terms and Conditions apply
UP TO £1000
  • Generous welcome bonus
  • Over 2000 slots and table games
  • Best game providers
100% up to £150 + 50 Free Spins on Big Bass Splash
  • Slots, Bingo & Live Casino Games!
  • Top Game Providers
  • Range Of Jackpot Slots
Get up to 500 bonus spins
  • New Casino
  • Free Spins on Starburst
  • 100's of Slots
Up to £100 Bonus + 100 Bonus Spins
  • Brand New Casino
  • Huge Jackpot Pools
  • Live Dealer Games
50 Bonus Spins on First Deposit
  • No wagering welcome offer
  • Great incentive for players
  • Professional and friendly support team
100% Up to £50 + 100 Spins
  • VIP Loyalty Program
  • Range Of Top Games
  • Multiple Deposit Methods
100% Up to £100 + 100 Spins
  • Leading software providers available
  • Mobile-friendly
  • Games proven fair
100% Match up to £300
  • Available on both desktop and mobile
  • Contains two live dealer casinos with more than 8 distinct games total
  • Features a wide variety of Microgaming slots and other casino games

What is a 400% Deposit Match Bonus?

400% casino bonuses are offered to players upon arrival at an online casino, the purpose of the match bonus is to entice players to create an account and make a deposit. The casino then rewards the process by not only matching your opening deposit but quadrupling it and presenting you bonus funds to enjoy once you have played through your initial deposit.

These casino deposit bonuses are a high-rollers dream allowing them to make out on their opening deposit and receive thousands in return to wager at the casino site. Let’ take an example to break down this bonus offer. If an online casino offers a welcome bonus of 400% up to £200 and a player deposits the maximum amount, then a player will receive their initial £200 plus an additional 400% of this amounting to £800. The punters will then have a total of £1000 to wager across the online casino.

Read: The Latest UK New Casinos 2022

How to Find the Best 400% Bonus

The search certainly isn’t difficult, players can simply scroll up to the top of this page and feast their eyes upon a number of 400% bonus offers. Finding the perfect 400% first deposit bonus to suit your preference is a different story.

All players have various likes and dislike while wagering at an online casino, checking the terms and conditions and the allocated games to the associated free spins can aid in selecting the best bonus. Furthermore, checking out the casino itself is vital to the success of your bonus. Make sure the departments within are to your fancy from the slots to the live casino section and all other relevant fields.

Read: Find All The Best UK Live Dealer Casinos

The minimum deposit shouldn’t be an issue for most players preparing to claim such a substantial welcome bonu. Yet, thee maximum withdrawal amount will be a factor to consider and although this is not apart of the bonus itself it will benefit you in the long run.

How to Claim a 400% Casino Welcome Package?

UK players can rejoice in the fact that 400% casino deposit bonuses are easier than ever to claim. Gone are the days of a singular large deposit amount needed to claim such an enormous casino offer. Bonus minimum deposits are now set at £20 varying slightly from between casino sites. This permits all gambling fans the possibility of claiming some substantial bonus funds that are relevant to their personal bankrolls.

Of course, high rollers can still max out the casino bonus and obtain funds for the day but now more than ever casino deposit bonus offers are accessible to all new players entering the online gambling world.

Follow this step by step guide to claim a 400% deposit bonus today – From start to finish!

  1. Enter the casino by clicking the “Claim Bonus” button beside the bonus of your choice.
  2. At the casino site hit “Register”.
  3. Fill out the signup form with basic information such as name, email address, mobile number, and create a password.
  4. Verify your casino account and select a payment method within the “cashier” section.
  5. The amount you deposit will amount to the sum of bonus funds you receive in return.
  6. Confirm deposit and enjoy your new online casino bonus.

This simplistic process permits players to claim a 400% deposit bonus instantly. The terms and conditions will automatically be accepted upon first deposit, make sure to read through and ensure you agree to all terms.

Read: Find All The Best UK Live Dealer Casinos

Bonuses for Existing Players

Although 400% welcome bonus offers are only created for new customers, an existing member at various online casinos has the opportunity to receive casino deals. 400% casino bonuses can also be found within VIP clubs for loyal casino members. These deposit bonuses are presented in the form of cashback bonuses and VIP bonus offers often providing bonus spins too.

Pros & Cons of 400% Casino Deposit Bonuses

Before claiming a 400% casino bonus its always a good idea to weigh up the pros and cons, we have listed each here for you to aid in your decision process.


The benefits of a 400% bonus will span for weekly through your casino gameplay. These bonuses not only provide players with huge amounts of bonus funds but also permit players to test out new slots and learn new games without the risk of losing your own hard-earned cash. Here are the advantages of obtaining a 400% casino bonus.

Read: Find All The Best UK Live Dealer Casinos

  • Risk-free wagering
  • Easy to claim
  • Allows players to wager for longer
  • Multiples your deposit by 4
  • Perfect for a Highroller and also accessible for low rollers.
  • Often come with bonus spins

Its clear the benefits of these bonuses are expansive. New players and exciting players can utilize these bonuses at online casinos and test out various games with reasonable wagering requirements for most match bonus offers.


The advantages heavily outweigh the disadvantages, nonetheless, there are a few points worth noting. These two aspects within the terms and conditions of these casino bonuses have hindered new players in the past.

  • Higher wagering requirements
  • Short expiration dates

All casino bonuses implement these conditions yet $400% casino bonus offers can be sustainably higher, carefully read through before completing your first deposit,

Terms & Conditions – What to Expect

The terms and conditions of a 400% casino bonus offer often determine how players will use the bonus funds within the casino. Educating yourself on the vital terms will benefit you not just for your next bonus offer but for every bonus then after. We take the pleasure in breaking down the important terms to give you the expert knowledge while claiming your next massive welcome package.

These terms are in most online casinos, welcome bonuses will vary between casinos and bonus money will also. Ensure you understand the following terms before diving into your next 400% casino bonus!

Wagering Requirements

The wagering requirements of a casino bonus are unavoidable, this figure will determine if you will be able to hold on to your bonus funds. Wagering requirements are put in place to give the online casino the chance of claiming back the funds it has given out. This wagering requirement figure will be stated beside the casino bonus in our top list amounting to 40x to 60x.

Expiry Date

Deposit bonus offers and free spins don’t last forever, in an ideal world we could come and go from a casino and our bonus funds would be untouched. Check the expiry date to ensure you don’t lose out on your received bonus funds or winnings by not adhering to the wagering requirements in time.

Minimum & Maximum Amounts

The minimum deposit amount of 400% casino bonuses often matches the gambling site min amount. This is usually set at £20 with some exceptions being as low as £10. The maximum amount will vary between casinos, high-roller can be glad to hear that this amounts in the thousands at casinos with 400% deposit bonuses.

Free Spins (If Applicable)

Free spins are attached to most welcome bonus offers, they can be claimed and enjoyed across selected slot games. These bonus spins are a perfect addition to all 400% bonuses allowing players to test out the latest slots without having to tap into their bonus funds. .

Read: Our Complete List Of UK Free Spins Offers For 2022

If this list of a bit slim pickings for you, it’s important to remember that these types of bonuses rarely come up and when they do, the terms and wagering requirements can often be very restrictive. Check out our research on all the 100% deposit match bonus offers for a greater variety of brands.

400% Welcome Bonus at Online Casinos FAQ’s

Do all casinos offer 400% casino bonus offers?

Unfortunately not, the most common form of the deposit match bonus is a 100% bonus offer. This doesn't mean that they are not still present, check out our 400% casinos here at Casino Martini.

Are there free spins attached to 400% welcome bonuses?

Yes, nearly all welcome bonuses present bonus spins in the United Kingdom and 400% bonus offers are no different.

What is the wagering requirement of a 400% bonus?

Every casino differs within their wagering requirement figure, a player can expect to wager their bonus from 30x to 70x depending on the casino.