Discover 400% casino bonus offers in the UK. Our casino experts have found 400% deposit bonuses to make your search easier; see them all on this page.
While these bonuses are rare, there are some 400% bonus offers available for British gamblers. These deals are some of the highest value welcome offers available on the market.
Each of the featured 400 bonus casinos is UKGC licensed and verified to be safe by our casino experts.
Browse our list of casino sites with 400% match bonus offers to find the latest deals. We have personally tested each offer, and update the list whenever new 400% deposit bonus offers come up!
Casinos with a 400% casino bonus are listed below:
| 1st deposit bonus | 400%/£40 |
|---|---|
| Wagering requirements | 50x (B) |
| Forfeitable 1st deposit bonus | Yes |
| Minimum deposit for bonus | £10 |
| Bonus code | - |
Unibet is one of the most well-known international brands in the gaming industry and has also gained great popularity in the UK. Kindred Group ltd, the company behind Unibet is ... Unibet casino review »
Are you ready to get your hands on a 400% bonus from the best casino sites? Here, we have highlighted the top 400% casino bonuses.
Best 400% bonus casinos in December 2024 are listed below:
Unibet is the best casino with a 400% deposit bonus.
Unibet is a legend; there's no doubt about that. Founded all the way back in 1997, they are one of the longest-running online casinos in the world. And you don't get to be this old without knowing what players want.
One of the best features of this casino is that they are the perfect all-rounder. They have slots, table games, sports betting, bingo, poker, and pretty much everything gambling-related under one roof. You don't have to decide where to play which game, as they are all right there.
Unibet also knows how to welcome a player. Their offer is a spicy one.
You can read more about the casino by checking the Unibet casino review, or hop right on in and claim the bonus.
Play on Unibet »
We rate 400% bonuses by evaluating the bonus terms, including maximum bonus, wagering, bonus terms and withdrawal limits. After this, we compare the bonus to other current offers and industry benchmarks to give you a complete overview.
Our seasoned casino experts have been reviewing casinos and bonuses for years and are very familiar with what is available in the UK.
When testing and reviewing casinos and their bonuses, these are the features we look for:
You can learn more about our casino reviews and what is important by reading our online casino review guidelines.
A 400% casino bonus is a promotion that gives you bonus funds to use at the casino relative to your deposit. The bonus percentage, in this case, 400%, and the maximum bonus listed tell you how much money you can get.
A standard bonus offer is usually 100%, so getting a 400% deposit bonus is a big deal. These offers are rare, and a casino website with such offer not easy to come by.
Big bonus percentages often translate to small maximum bonuses. This is why you often see these relatively small casino sign up offer deals that then pack a huge punch.
Use our 400% deposit bonus calculator and see how wagering requirements and other features may affect your bonus.
Your deposit:
£ 0
Bonus amount:
£ 0
New casinos are always interesting and from time-to-time, fresh ones can offer you as high as 400% bonus. These offers are not easy to come by though and finding new casino websites that have them is not easy.
Check out the list below anyway for some of the newest UK casinos that have 400% deposit bonuses or other very big bonus offers.
1. Find a 400% casino bonus from our list
Here, we have listed tested and reviewed casinos with a 400% welcome bonus. Take a look at the casino list, see what is available for UK players and pick your favourite.
2. Read the casino review
After picking a casino, you can read the casino review and see what our seasoned experts thought about the site. Let their experiences on the site help you make a decision.
3. Go to the casino
On every casino review, there is a big green ‘PLAY HERE' button that takes you straight to the casino. If the bonus is an exclusive special offer, then this button is your way to get that deal.
4. Sign up and claim your bonus
When you get to the casino, you need to sign up and create a casino account. Just fill in the required information, and you are ready to deposit and claim your bonus. Just make sure you read the bonus terms.
Find 400% casino bonuses
Like all other bonus offers, 400% casino bonuses have their own terms and conditions. They are basically the same as with smaller bonuses, but certain numbers might be tweaked a bit differently.
Here are the terms that are especially important:
By knowing these terms, you are ready to handle most of the bonus offers on the market. It is still always good to double-check the bonus terms and see what each bonus offer is all about.
Even though big welcome bonuses look good, they do have their own pros and cons. Here are some of the biggest perks and flaws of 400% bonuses.
Perfect for trying out a casino
Low minimum deposit requirements
Simple bonus concept
Maximises the value of your deposit
Maximum amounts are usually small
Terms can be more difficult
Big bonus percentages are rare
Deposit bonuses come in all shapes and sizes. It is true that the bigger the bonus percentage is, the rarer they are on the market. Getting a 400% match bonus is not easy, but if you go lower, you will get plenty more options.
Check out some of our other deposit bonus pages and see what offers are available for each.
A 100% deposit bonus is the most common and straightforward offer at online casinos. It doubles your deposit amount, providing a balanced boost to your bankroll. This type of bonus is ideal for players who prefer a direct and simple approach with friendly terms.
You can discover the best deals on our 100% deposit bonuses page.
Moving up the scale, a 200% deposit bonus triples your deposit, offering a more significant boost. While the terms might be slightly heavier, these offers usually have reasonable conditions with some added punch.
You can explore the casinos with 200% deposit bonuses to find a bonus that matches your preferences.
A 300% deposit bonus quadruples your deposit amount, providing you with a huge uplift to start with. The casinos offer these generous bonuses mainly for newcomers, and you want to keep an eye out for conversion caps that may limit your winnings.
Our experts have listed the top 300% deposit bonuses to help you. Check out the reviews and details of their terms before choosing your bonus.
At the high end of the scale, a 500% bonus offers a massive increase, multiplying your deposit by six. These bonuses are rare and often come with specific conditions but provide the biggest match percentage.
Check out the 500% deposit bonuses page to find deals of this calibre. Remember to evaluate the terms and conditions before your decision.
Find 400% casino bonuses
