Discover the Latest 400% Casino Bonuses
BET £10 GET £50 AT BOYLESPORTS CASINO
£10
40X (Bonus)
500%
2007
After registering at BoyleSports Casino, you can deposit £10 and get a 250% up to £25 bonus. You can use the funds to play many game types, such as slots, table games and live dealer games.
Remember that you must complete a 40x wagering requirement before cashing out. After that, you may withdraw up to £500.
Pros & ConsPros
- You can play several game types with the bonus
- High maximum cashout of £500
Cons
- The 40x wagering is on the higher side
We recommend this welcome bonus for its gaming versatility, as you can play slots, table games or even live delaer games. Moreover, we appreciate the high maximum cashout of £500. The only downside is the slightly high wagering of 40x.
£10
5X (Bonus)
400%
2006
When you join Mecca Bingo Casino, you can deposit £10 and claim the welcome offer.
The match promotion has a 5x bonus wagering requirement. Once you complete the conditions within 28 days, you can cash out everything you win.
The deposit spins are available on a Blueprint slot game. These rounds expire in 21 days and have no rollover conditions. Also, players can withdraw all the winnings.
Pros and ConsPros
- An extended lifetime of 21 days for the rounds and 28 for the match bonus
- You can withdraw all the winnings from the spins and match promo
- Low wagering of 5x bonus
- No rollover requirements for the spins
Cons
- Only one game to use the free spins
If you’re a new player at Mecca Bingo, we recommend you claim the first deposit offer thanks to its limitless winnings withdrawal feature. Moreover, the promotion fits all types of players since the match bonus has a small rollover, and there are no wagering conditions for the Blueprint deposit spins. Still, the promo might not fit players who want diversity because the spins are available on only one game.
Exclusive Offer
Only by email
Your e-mail will not be shared with any third parties. By adding your e-mail you agree to receive daily casino promotions, and this will be the sole purpose it will be used for.
Claim a Top 400% Deposit Bonus UK at Unibet Casino
Take advantage of the Unibet 400% deposit bonus offer to enhance your gaming experience. Deposit £10 and receive an extra £40 in bonus funds to get you started.
Pros
- Enjoy a substantial match of £40 on a modest £10 deposit.
- Bonus funds can be used on any slot games available on their platform.
- The long validity period of 30 days is great.
Cons
- The bonus funds come with a high wagering requirement of 50x.
Our Verdict on Unibet’s Offer
Our team finds this offer to be highly appealing for UK players, considering it’s coming from the renowned Unibet Casino. The 400% deposit bonus is a rarity in the UK market, making it a standout deal.
However, it’s crucial to note the 50x wagering requirement attached to the bonus, which could be challenging for some. Such high deposit matches are generally better suited for experienced British punters familiar with meeting promotional conditions. If high wagering requirements are daunting, we suggest exploring our list of low-wagering bonuses.
If you find the wagering challenging, we also included no-wager free spins in our database for a more suitable alternative.
Why Choose Unibet as Your 400% Deposit Bonus Casino?
We recommend Unibet Casino to players who appreciate flexible payment options. With a minimum deposit of just £5 and equally low minimum withdrawals, it’s accessible for all. You can explore a vast collection of over 1900 slots and 250+ live tables. Additionally, their 24/7 live chat support ensures you can resolve any account issues at any time.
On the downside, there is no VIP program for existing player rewards. Also, Unibet processes withdrawal requests within approximately 24 hours, which is way faster than the industry average of 2 days. If fast payouts are essential for you, consider our other recommendations for quick payout casinos.
For more detailed information on the top-notch gaming website, refer to our comprehensive Unibet Casino review.
Foxy Games Welcome Bonus – Best Alternative
If you want to explore other similar alternatives to our first pick, Unibet. You can browse our ranking or go straight to the promotion page of Foxy Games. You will find a similar 400% match offer with a slightly less challenging rollover of 40x and 40 wager-free spins to make your journey on the website seamless.
400% Bonus Casino: Our Reviewing Process
Want to know more about how we review casinos with 400% bonuses? We have simplified our criteria to help our subscribers understand our research methods. Vlad George Nita has gathered factual data to show you that we provide the best 400% casino bonuses.
We started from a list of 20 bonuses, and after testing each site, the selection was trimmed down to 4. Our experts check each site for at least 5 hours, aiming to meet the wagering and cashout.
Please take a look at our tools of expertise.
| Review Criteria | Our Way | Final Outcome For You |
|---|---|---|
| Evaluate Minimum Deposit and Bonus Value | We examine the minimum deposit required to activate the bonus, ranging between £5 and £20 across different casinos. | It ensures you can activate the bonus with a low initial deposit, making it accessible to casual players. |
| Check Payment Options | We assess the variety of payment methods allowed for bonus activation, focusing on debit cards and popular e-wallets. | It guarantees that you can choose a payment method that suits your preference, but some methods, like Skrill, may be excluded. |
| Analyse Wagering Requirements | We carefully review the wagering requirements, which typically range from 40x to 50x for 400% bonuses. | It helps you understand how easy or hard it will be to meet the bonus conditions before withdrawing winnings. |
| Review Eligible Games | Our team checks which games contribute fully to the wagering requirement, prioritising casinos with flexible options. | It ensures you can play a variety of games, from slots to tabletop games, without facing severe restrictions. |
| Examine Maximum Cashout Limit | We verify the maximum cashout limits imposed on the bonus winnings, often 5-10x the initial deposit. | Clarifies the maximum amount you can withdraw, so you don’t expect to cash out more than allowed. |
| Test Real-World Casino Performance | We create accounts, deposit real money, and play with the bonus to verify game performance and overall user experience. | Ensures the gaming experience is smooth and reflects what a typical player would encounter. |
| Check Customer Support and Policies | We test customer support by asking about bonus terms, withdrawal issues, and technical queries. | Guarantees you’ll have reliable support if you run into problems with the bonus or your account. |
| Look for Additional Bonus Availability | We verify if the casino offers other promotions, such as reload bonuses or VIP perks, to enhance your experience. | Ensures you can benefit from ongoing promotions even after claiming the initial 400% bonus. |
How KingCasinoBonus Tests 400% Casino Bonus Offers
Without exception, our Best UK casino bonuses must pass a multi-step testing procedure. A closer view of our process will help you decide whether you should deposit and get a 400% bonus. Check the following section to understand better how we keep you safe when visiting an online casino presented in this page: 
- Research phase: Our team first gathers a list of operators that give out 1st deposit bonuses with a 400% match percentage. Then, the list is filtered only to feature legit United Kingdom casino operators.
- Account creation and KYC: The first step of the actual review process is creating and verifying an account following the casino’s terms and conditions.
- Real money deposit: When all prerequisites are met, we casino with a 400 the minimum eligible amount and activate the 400% bonus. This way, our testing phase mirrors the average British player’s experience.
- Playing different casino games: With 400% bonuses, your bankroll multiplies 5 times so you can play quite a few games even with a low deposit. That’s what our experts do. We play the resulting balance in different games, noting the technical performance.
Our Tips on Choosing The Best 400% Deposit Bonus
Because we want you to always grab the best 400% deposit casino bonus, we will show you a comprehensive successful recipe that will help you an informed, smart decision on choosing the best bonus at ta top-tier UK online casino:
Check for a Licensed and Regulated Casino
- Always select a casino licensed by trusted authorities like the UK Gambling Commission (UKGC) or Malta Gaming Authority (MGA).
- Tip: Playing at a licensed casino protects your funds and personal data.
Look for Low to Medium Wagering Requirements
- Choose a casino that offers manageable wagering requirements, preferably under 40x, which will make it easier to meet the terms.
- Tip: High wagering requirements (50x or more) make it harder to withdraw your winnings, so prioritise lower standards.
Ensure a Variety of Games
- Select a casino that offers a wide range of games, including slots, table games, and live dealer options, to enjoy your bonus fully.
- Tip: Look for reputable game providers like NetEnt, Play’n GO, and Pragmatic Play to ensure high-quality gameplay.
Check the Contribution of Table Games and Live Casino
- If you like playing table games (blackjack, roulette), ensure they contribute towards the wagering requirements, even if at a lower rate.
- Tip: Many casinos only allow slots to contribute fully to wagering, so if you prefer table games, look for casinos with flexible contribution rates (e.g., 10%-20% for table games).
Fast and Secure Withdrawals
- Choose a casino with quick withdrawal processing times and a variety of payment options, such as PayPal or e-wallets, which usually offer faster payouts.
- Tip: Avoid casinos with long withdrawal times (over 5 days) or hidden processing fees that could cut into your winnings.
Prioritize Strong Customer Support
- Opt for casinos that offer 24/7 customer support, preferably with live chat options, to ensure you can resolve issues quickly.
- Tip: Test the responsiveness of the customer support before you commit. Having fast, helpful support makes a big difference when claiming bonuses or resolving issues.
Check Bonus Terms for Hidden Restrictions
- Carefully read the bonus terms to spot any maximum bet limits, restricted payment methods, or game exclusions that could affect your bonus usage.
- Tip: Some bonuses may look great upfront but have restrictive terms (e.g., max cashout limits or short timeframes to meet wagering).
Multiple Payment Methods
- Look for casinos that offer a variety of payment methods (credit cards, e-wallets like Skrill, PayPal, etc.) and ensure that your preferred method is eligible for the bonus. Also, check fast withdrawal casinos for a better waiting time.
- Tip: Some casinos exclude certain payment methods (e.g., Neteller) from bonus eligibility, so always check before depositing.
Mobile-Friendly Platform
- Choose a casino that provides a mobile-friendly platform or dedicated mobile app, allowing you to enjoy the bonus on the go.
- Tip: Ensure that the casino’s mobile version has the same range of games and features as the desktop version for seamless gameplay.
Terms & Conditions of 400 Match Bonuses to Be Aware of
| Terms and conditions | Explanation |
|---|---|
| Limited bonus value | The value of a 400% bonus rarely goes over £100 in bonus funds, which may be lower than 300% or lower percentages. |
| Potentially high wagering requirement | Since the deposit multiplier is so high, you can expect to wager the bonus 40 times or more |
| Excluded slots from bonus wagering | Playing excluded games will lead to your bonus winnings being cancelled. |
| Low contribution to wagering in table games and video poker | Table games may sometimes be excluded entirely from wagering, or they will contribute around 5 to 15%. |
| Limited contribution to wagering in live dealer games | For most 400% casino bonuses, the bets you place in live games will only count around 2-10% of their value. |
| Excluded bets | Some bets may cancel your bonus, for example, even money in roulette and doubling in slots. |
| Maximum bonus bet amount | Generally, you should bet less than 10% or £5 to stay on the safe side. You can only keep what you win if your bets do not exceed this limit. A few UK casinos may have a £2.5/bet limit. |
| Restrictions on payment methods | Debit cards are likely the only accepted form of payment. The most common restrictions are Skrill and Neteller, which cannot be used to claim promos at many casinos. |
| Maximum cashout limit | Your final payout will be capped if you complete the wagering and win more than the limit. |
The key to making the most of 400% deposit bonuses in the UK is to pay close attention to the fine print. Before diving in, we recommend you take the time to thoroughly review the terms and conditions of any offer, so you can grasp exactly how it works. Typically, you can find these details either below the bonus description or in the promotions section of the website.
After finding them, compare the wagering requirements, eligible games, maximum bet, and other rules across a few sites from the UK to see which offer best suits your playstyle and wishes.
Keep an eye out for any excluded slots that don’t contribute to the wagering requirement. Additionally, take note of any restrictions or reduced contribution rates for table games. Usually, the contribution for such game types is around 5 to 15%, which is not exactly lucrative.
Apart from game limitations, be mindful of factors like maximum cashout limits, minimum deposit requirements, casino bonus codes, and time constraints that may apply.
Understanding these terms upfront allows you to assess whether the 400% bonus suits your gaming style and budget before signing up. If you’re unsure about anything, we recommend you don’t hesitate to reach out to customer support for clarification.
Best Slots to Play With a 400% Deposit Bonus
You can play many low-stakes slots with a 400% casino bonus, but remember to check the terms and conditions for game contributions and excluded games.
High-rollers looking to profit the most off creating their account for the first time can benefit from 400% deposit bonus percentages. However, remember to keep your stakes on the low end to avoid being classified as a bonus abuser because generous bonuses come with high responsibility.
Eligible slot games at most UK casinos
- Immortal Romance (Microgaming)
- Finn and the Swirly Spinn (NetEnt)
- 9 Masks of Fire (Microgaming)
- Fire Joker (Play’n Go)
- Starburst (NetEnt)
- Rainbow Riches (Barcrest)
- Book of Dead (Play’n Go)
UK casinos with 400% deposit bonuses let you play these slots without exception. Claim Book of Dead spins with no deposit before you commit financially.
Frequently excluded slots
- 1429 Uncharted Seas (Playtech)
- Blood Suckers (NetEnt)
- Untamed Wolf Pack (Microgaming)
- Dead or Alive 2 (NetEnt)
- Beautiful Bones (Microgaming)
- The Wish Master (NetEnt)
- Eye of the Kraken (Play’n Go)
Explore Live Dealer Games With 400% Bonuses
UK players who prefer card games or roulette can play with their 400% deposit bonuses. Still, the wagering progress will be more challenging due to the limited game contributions.
The highest contributions for live games may reach 10%, and you’ll find them at the best live dealer casinos in the UK.
Live Dealer Casino Welcome Package Alternatives
Our experts have tested diverse live dealer casinos’ welcome offers in the UK industry to provide you with more quality casinos with different bonuses. All you have to do is visit those casinos and make your first deposit. The prizes are very generous, and you don’t need a promo code.
| Best Top Live Dealer Casino | Bonus Type | Wagering | Max. Withdrawal |
|---|---|---|---|
| Mr.Play Casino | 200% up to £40 | 35x | Not Mentioned |
| Voodoo Dreams | 100% up to £50 | 30x | £500 |
| 21.co.uk Casino | 100% up to £50 + £6 live casino chips | 40x | £50 from chips |
While these bonuses match your deposit by 400, some of the bonuses we recommended have a relatively high minimum deposit of £20. Play with a lower 10-pound minimum deposit amount on a live casino that’s equally good.
Live dealer games wagering contribution
| Live dealer games | Wagering contribution |
|---|---|
| Immersive Roulette (Evolution) | 50% (Caxino Casino) |
| Lightning Roulette Live (Evolution) | 10% (Dunder Casino) |
| One Live Blackjack (Pragmatic Play) | 10% (888 Casino) |
| Speed Roulette Live (Evolution) | 8% (JackpotCity Casino) |
| Speed Baccarat Live (Evolution) | 50% |
| Dream Catcher (Evolution) | 50% |
| Deal or No Deal Live (Evolution) | 50% |
Payment Options You Can Find at 400% Deposit Casinos
| Payment service | Deposit range | Cashout range | Cash-out processing time |
|---|---|---|---|
| VISA | £1 – £10,000 | £1 – £10,000 | 1-3 days |
| Mastercard | £1 – £10,000 | £1 – £10,000 | 1-3 days |
| PayPal | £1 – £5,000 | £1 – £5,000 | Instant – 1 day |
| Skrill | £1 – £5,000 | £1 – £5,000 | Instant – 1 day |
| Neteller | £1 – $5,000 | £1 – £5,000 | Instant – 1 day |
Remember that to qualify for the 400% welcome bonus, your first deposit must be made using an approved payment method. Accepted methods include credit/debit cards, bank transfers, and a few selected e-wallets. However, please note that deposits made via Skrill, Neteller, and prepaid cards do not qualify for the bonus.
Furthermore, if your initial deposit is made at a PayPal casino, your maximum bet may be reduced to £2.5 while clearing wagering requirements. For additional details on payment requirements, you can use the table below to double-check the restrictions associated with the 400% welcome bonus.
How to Avoid Bonus Abuse?
Pay attention to these strategies offered by our team of experts because, based on our 9+ years of experience, we understand some issues that can lead you to bonus abuse. Avoid it at all cost because, after all, your funds must not be wasted in vain by not being aware of some essential rules:
Use One Account Only
- Stick to using one account per casino.
- Why: Creating multiple accounts to claim bonuses is a common form of abuse and can result in all your accounts being banned, along with any winnings forfeited.
Don’t Cash Out Without Playing
- Always play through the bonus funds by placing real bets before trying to cash out.
- Why: Attempting to cash out your bonus without playing will be flagged as abuse, and you’ll lose the bonus.
Avoid Bonus Cycling
- Don’t request a payout immediately after completing the wagering requirements just to claim another bonus.
- Why: This practice is often considered unfair use of promotions and may lead to the cancellation of your bonus eligibility.
Play Real Bets, Avoid Bots or Scripts
- Use your bonus naturally by placing real bets and avoid using automated bots or scripts to exploit the bonus.
- Why: Casinos can detect unusual betting patterns, and using bots may result in the loss of your bonus and even account closure.
Read the Bonus Terms Carefully
- Make sure you fully understand the terms and conditions before opting in for a bonus.
- Why: Missing a crucial term, such as the wagering requirement or max bet limit, could lead to your bonus being voided.
Avoid Hedging Bets
- Don’t place multiple bets to cover all possible outcomes (e.g., betting on both red and black in roulette).
- Why: Hedging bets to guarantee a win goes against fair play, and casinos often restrict this type of wagering in their terms.
Don’t Collude with Other Players
- Avoid teaming up with other players to swap or combine bonus funds.
- Why: Casinos consider collusion fraud, which will immediately suspend all accounts involved.
Stay Within the Maximum Bet Limit
- Always follow the casino’s maximum bet rule when playing with bonus funds.
- Why: Exceeding the maximum bet limit (typically around £5) will result in losing your bonus and any winnings earned.
Explore Casinos With Different Deposit Matches
While 400% deposit bonuses have potential, they can also impose very high wagering requirements and limiting terms, which is where the best alternatives may become interesting for you. For many players, clearing a 400% bonus is unrealistic and takes away all the magic of the 400% deposit bonus.
Similarly, some inexperienced players may simply want to start with a smaller multiplier like the 300% bonus or 200% deposit offer or 100% deposit offers to test out a new casino and become more confident in their gambling skills.
Regardless, our KingCasinoBonus experts selected other casino bonuses with different deposit match percentages, so you can choose which one is the best for you.
- 250% up to £35 at Kaiser Casino – Use bonus code “250” on your £10 first deposit to unlock the 250% match. While not the largest bonus, the reasonable 35x playthrough helps offset the lower cap. This bonus is worth claiming if you want to get both lower wagering and high match.
- 200% up to £40 + Spins at Trada Casino – Enter “200UK” with your £20 deposit to claim a 200% bonus plus 100 Book of Dead spins. Despite high 60x wagering, the free spins available on one of the most popular slots in the UK add significant value. However, if you are not necessarily fond of Book of Dead and you want better terms for bonus funds, you should check out other 200% match bonuses.
- 100% up to £200 at MadSlots Casino – This very common 100% match gives you 2x your deposit up to £200. With only 30x rollover, this bonus makes it easier to withdraw your funds. We recommend all beginners start out with this low wagering promotion, then move on to up to 500% match casino bonuses.
400% Deposit Bonus Casinos: King’s Final Verdict
When reviewing 400% welcome bonuses, our KingCasinoBonus.uk experts take a meticulous approach to analyzing the terms and conditions. While the multiplier is always thrilling, the reality often reveals strict wagering requirements, game restrictions, and low withdrawal limits attached.
A typical 40-50x playthrough on just slot bets means clearing these bonuses requires a great deal of experience. Moreover, casual players may struggle to redeem winnings if you consider the low 5 to 10% table game and live dealer contributions. While bonus funds are typically meant to be used on a multitude of game types, the low wagering contributions on these game variations will clearly keep you from exploring them.
While possible, cashing out from a 400% match is statistically unlikely for the general player. Our advice is to target 100 to 250% offers boasting more favourable terms overall.
Pros
- By claiming a 400% welcome bonus, you’re getting a large match to your initial deposit, increasing your balance significantly.
- With extra bonus funds in your account, you can try out more games and gain a better understanding of the casino.
- When redeeming deposit match bonuses, you’re not limited to just one game. You can use the 400% match to explore a variety of options and find the ones that suit your style best.
Cons
- Meeting the 40 to 50x wagering requirements can be quite difficult, especially if you don’t have much experience with casino bonuses
- In general, higher deposit matches have lower maximum cashouts. If your bonus winnings exceed the cap, you will only get the max cashout amount.