Updated
1/22/2025

All Current 400% Casino Bonus UK Offers

Jaw-dropping 400% casino bonus campaigns are luxury-something, hence they are a big rarity for the UK market. Subsequently, on this page, youā€™ll mostly find promotions with alternative percentages that give Brits the closest possible experience. Most importantly, all the deals come from proven and tested casinos with a coveted UKGC licence. All brands follow local gambling laws and regulations.

Bonuses Bonuses Free Spins Free Spins
United States of America Available in your country
Welcome Bonus: 200% up to £200 on 1st Deposit
Promo code:
Not needed
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User ratings:
šŸ’” Detailed information
#Ad 18+. T&Cs apply. BeGambleAware. UK and Ireland only. First-time depositors. Min deposit Ā£10. Claim within 48 hours. Expires in 90 days. 30x wagering; valid on selected slots. ...more
šŸ’µ Minimum deposit
10 GBP
šŸ’« Wager requirements
x30
šŸ•‘ Activation period
2 days
āŒ›ļøValidity
90 days
United States of America Available in your country
Welcome Bonus: 100% up to £300 + 150 FS
Promo code:
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šŸ’” Detailed information
#Ad 18+ Full T&C apply. BeGambleAware. New UK players only. Offer: 100% bonus match on 1st deposit + 150 bonus spins on eligible NetEnt Games. Minimum deposit amount is Ā£200+. ...more
šŸ’µ Minimum deposit
200 GBP
šŸ’« Wager requirements
x35
šŸ’ø Maximum bet size
5 GBP
āŒ›ļøValidity
7 days
United States of America Available in your country
Welcome Bonus: 100% up to £200 + 100 FS
Promo code:
Not needed
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User ratings:
šŸ’” Detailed information
#Ad 18+ Full T&C apply. BeGambleAware. New UK players only. Offer: 100% bonus match on 1st deposit + 100 bonus spins on Starburst, Gonzo, Aloha or Twin Spins by NetEnt. Minimum deposit amount is Ā£100. ...more
šŸ’µ Minimum deposit
100 GBP
šŸ’« Wager requirements
x35
šŸ’ø Maximum bet size
5 GBP
āŒ›ļøValidity
7 days
United States of America Available in your country
Welcome Bonus: 100% up to £100 + 50 FS
Promo code:
Not needed
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User ratings:
šŸ’” Detailed information
#Ad 18+ Full T&C apply. BeGambleAware. New UK players only. Offer: 100% bonus match on 1st deposit + 50 bonus spins on Starburst or Aloha by NetEnt. Minimum deposit amount is Ā£20. ...more
šŸ’µ Minimum deposit
20 GBP
šŸ’« Wager requirements
x35
šŸ’ø Maximum bet size
5 GBP
United States of America Available in your country
Welcome Bonus: 100% up to £50 on 1st Deposit
Promo code:
Not needed
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User ratings:
šŸ’” Detailed information
#Ad 18+. T&Cs apply. BeGambleAware. New UK customers only. Debit card deposits only + exclusions. Min. deposit: Ā£10. Wager bonus 50x. Offer valid for 7 days from registration. ...more
šŸ’µ Minimum deposit
10 GBP
šŸ’« Wager requirements
x50
āŒ›ļøValidity
7 days
United States of America Available in your country
Welcome Offer: 100% up to £100 + 50 FS
Promo code:
Not needed
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User ratings:
šŸ’” Detailed information
#Ad 18+ Full T&C apply. BeGambleAware. New UK customers only. Opt-in required. 50 Bonus Spins on Big Bass Bonanza at 10p per spin and 100% Deposit Bonus up to Ā£100 on first deposit (payment method and play restrictions apply). Min. deposit Ā£20. Max. Ā£5/spin or Ā£0.50/line. 30 days expiry. ...more
šŸ’µ Minimum deposit
20 GBP
šŸ’« Wager requirements
x30
šŸ’ Free spins value
0.1 GBP
United States of America Available in your country
Welcome Offer: 100% up to £200 + 50 FS
Promo code:
Not needed
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User ratings:
šŸ’” Detailed information
#Ad 18+ Full T&C apply. BeGambleAware. UK new players only. Min deposit: Ā£20. Offer: 100% up to Ā£200, 50 FS on Book of Dead and 500 LP on 1st deposit. Wager 35x. Bonus funds expire in 30 days. Spins must be used within 72 hrs.  ...more
šŸ’µ Minimum deposit
20 GBP
šŸ’« Wager requirements
x35
šŸ’ø Maximum bet size
5 GBP
United States of America Available in your country
Welcome Bonus: 100% up to £100 + 100 FS
Promo code:
Not needed
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User ratings:
šŸ’” Detailed information
#Ad 18+ Full T&C apply. BeGambleAware. New UK based customers only. Min. deposit: Ā£20+ via a debit card. Valid 7 days from registration. Free Spins on Gold Blitz once youā€™ve staked Ā£20 on any Games Global game. Spin value = 10p. ...more
šŸ’µ Minimum deposit
20 GBP
šŸ’« Wager requirements
x50
āŒ›ļøValidity
7 days
United States of America Available in your country
Welcome Bonus: 100% up to £100 + 100 FS
Promo code:
Not needed
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User ratings:
šŸ’” Detailed information
#Ad 18+. T&Cs apply. New players only. Min. deposit: Ā£20. Wager bonus 50x, for FS is not required. Valid 7 days. Stake contribution, games and payment method exclusions apply. ...more
šŸ’µ Minimum deposit
20 GBP
šŸ’« Wager requirements
x50
United States of America Available in your country
Welcome Bonus: 100% up to £100 + 100 FS
Promo code:
Not needed
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User ratings:
šŸ’” Detailed information
#Ad 18+. T&Cs apply. New players only. Min. deposit: Ā£20. Wager bonus 50x, for FS is not required. Valid 7 days. Stake contribution, games and payment method exclusions apply. ...more
šŸ’µ Minimum deposit
20 GBP
šŸ’« Wager requirements
x50
āŒ›ļøValidity
7 days
United States of America Available in your country
Live Casino Welcome Bonus
Promo code:
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User ratings:
šŸ’” Detailed information
#Ad 18+. T&Cs apply. BeGambleAware. New UK customers only. Match bonus of 100% up to Ā£50. Debit card deposits only. Deposit Ā£10 or more is required. For live casino games participants. ...more
šŸ’µ Minimum deposit
10 GBP
šŸ’« Wager requirements
x50

400% Casino Bonus ā€“ What is It?

The purpose of 400 casino bonus offers is to give clients additional money for play as gratitude for their deposit. In this case, the incentive will be 5 times bigger than the payment you make. For instance, if you add 20 GBP to your account, the operator will hand out 80 GBP as a bonus, which brings you a total of 100 GBP to gamble with.

Sounds too good to be true? And this is no accident: 400% casino bonuses come with predefined terms and restrictions that punters should be aware of. Most often, these promotions have an ā€˜up toā€™ condition, meaning your deposit will be matched up to a certain mark. If the ceiling is Ā£500, and you contribute Ā£150, youā€™ll still only receive Ā£500 on top. There may be a long list of requirements, which we recommend checking in advance ā€“ 400 per cent proposals donā€™t always play in our favour.

Availability of 400% Bonus in UK Casinos

These mouth-watering propositions improve gamblerā€™s chances of hitting a solid win noticeably. Yet, as expected, they are super rare for the British market. Weā€™ve inspected dozens of sites that hold a UKGC licence and can say with enough confidence that the typical size is 100% casino bonuses. If you happen to find higher percentages, these promotions will likely be reserved for big-volume punters.

Possible Ways to Get 400% Deposit Bonuses

Deposit match offers are a simple way to promptly boost your bankroll and feel more confident at the helm. Theyā€™re commonly found at online casinos open to Great Britain, but, as we mentioned earlier, itā€™s infrequent to locate one promising a bonus as high as 400 per cent.

This scenario would be more or less possible if an operator included a 400% deposit bonus in a welcome pack, chunked it in parts, and gave it in a series of payments: 1st, 2nd, 3rd, etc. Often, greeting packages embrace a mix of rewards ā€“ bonus cash and bonus spins. Or, such massive proposals may sometimes knock on high rollersā€™ doors who, for some reason, didnā€™t show activity for a while, inviting them to reload. VIPs are also among potential candidates for a casino bonus of 400%.

400% Bonus Terms You Must Know About

T&Cs surrounding 400 casino bonuses can drastically impact their value to British players. Therefore, it is essential to browse through these rules carefully before you accept any bonus-related proposal so that you are aware of any of its requirements or restrictions. You should be extra attentive to what is written in small print because the most tricky issues are usually hidden there. Weā€™ve prepared a brief outline of what to look for in T&C articles:

Minimum Deposit for 400 Casino Bonus

To collect a 400% casino bonus UK residents will most likely need to fund their gaming balance with some pounds sterling. The least amount required in welcome offers for this market is usually Ā£10 ā€“ Ā£20; youā€™ll rarely see exceptionally low demands of 5 pounds. Existing high rollers pay around Ā£50 for their exclusive bonuses.

Wagering Conditions

A good 400 deposit bonus has player-friendly playthrough terms. If the multiplier surpasses the mark of 35x, it will be arduous for a budget player to convert bonus funds into real ones. For novices, wagering needs are specific rules set by gambling operators that prevent scenarios where punters just take that extra cash and run. So a person has to play on with what the casino gives on top of the deposit for a certain sum before they can request a withdrawal.

Payment Method Restrictions

Some 400% bonus casinos impose sanctions on which banking solutions UK customers can use during the 1st deposit if they wish to put their hands on a welcoming reward. Our experience shows that electronic wallets Neteller and Skrill are the most common candidates to be excluded from such promotions. While debit cards are almost always a surefire way to pass this qualification.

400% Casino Bonusā€‹

Valid 400% Deposit Bonus Code

This isnā€™t always necessary, but sometimes youā€™ll come across 400% casino bonuses with this offbeat condition. Codes associated with new player offers will be displayed in the T&C appendix on your operatorā€™s official website or here on this page. But you may also find them in promotional emails that bring individual reload deals.

Disallowed Games

Every online casino hands out a 400% bonus on a pre-selected range of entertaining titles. Itā€™s often the case that products sourced from a particular developer company donā€™t qualify for playing with extra money. Eligibility restrictions may also apply to specific parts of the gaming lobby, but usually, Brits have a lot of freedom in this respect and access diverse games (from slots to tables with live dealers).

Expiry Periods

400% first deposit bonuses serve just within an allotted time interval, for example, 30 days of joining the site. Once a punter grabs the incentive, they should stick to a certain timeframe of using it. Finally, thereā€™s a fixed expiration date by which the playthrough process must be finished. Our experts pick resources that provide customers with ample time for every stage.

    How to Claim 400% Casino Welcome Bonus

    Now that you all understand the T&C intricacies that may trap you in the future and can screen out trash offers, it is time to see how the actual claiming process works. It is dead simple and doesnā€™t vary much from one gambling venue to the next. Any industry novices here? Below are general steps to activate your welcome casino bonus of 400 per cent:

    Step 1
    Step 1

    Find a few credible UKGC-regulated online casinos, which run this promotion, and compare them. You can do a bit of research on your own or see our list of the best 400% casino bonuses weā€™ve curated to help you narrow down your variants.

    Step 2
    Step 2

    Make sure all terms of the offer align with your particular capabilities. Keep an eye on wagering normative: turnover size, suitable betting range, deadline, etc. Check whether you should play through only extra pounds or also winnings if youā€™re lucky enough to collect any. Never neglect this step!

    Step 3
    Step 3

    Once you've spotted the right 400% first deposit bonus for you, set up an account on that site. Registration forms are similar across all resources and request standard contact and personal details. Don't worry! We feature the safest online casinos, and they incorporate harsh security measures to shield your information.

    Step 4
    Step 4

    Think of a deposit amount you want to add as it will affect your eventual reward. Select a suitable payment method you trust and know to use. Take all necessary actions to complete the transaction; remember to input a bonus code if this move is among the conditions.

    Step 5
    Step 5

    See if your 400 casino bonus UK successfully reached your balance. Now you can explore the platform and play unfamiliar or beloved games with your boosted bankroll. Do you have any problems with charging the reward? Customer support is always there to help you!

    Payment Methods To Use for 400% Bonuses

    Casboxes of UK online casinos that payout are brimming with payment services, so Brits will not run out of choices. But, gamblers shouldnā€™t lose sight of the fact that some gateways might not qualify for 400% deposit bonus claims. (For the record, e-wallets normally fall in this category.) Or, vice versa, only a specific banking method will be suitable, often this is a debit card. Here are the ubiquitous options that work most of the time:

    Debit cardsThe usability of the Mastercard and Visa cards is beyond debate: many Brits use them daily. They are probably the best choices for those who want to benefit from 400% casino bonuses. A quick reminder: credit cards should not be used to pay for iGaming activities following local laws.
    Mobile payment appsUKā€™s top-ranked mobile casinos add applications like Apple Pay and GPay to their cashiers. No wonder, as using smartphones everywhere is now common practice. And whatā€™s more, youā€™ll encounter resources that accept payments made via a phone bill, though rarely.
    PayPalAlthough 400% casino bonus UK campaigns arenā€™t always friendly to e-wallet deposits, PayPal joins the restricted list less frequently. Its finest encryption and security benefits have made it popular with the British audience.
    TrustlySuper handy service that enables a gambler to carry out payments through his or her online bank account. God save the Swedish company behind its development. šŸ˜‰
    Bank transfersAvailable at almost every 400% bonus casino; typical method for claiming deposit match offers. However, we should outline that bank wire transfers work more slowly, so consider this fact when handling your replenishments.

    Core Benefits and Drawbacks

    Claiming matchup offers is followed by noticeable advantages, which makes them a bountiful catch for UK gamblers. Below we highlight a few key reasons why playing with a 400% casino bonus is worth it:

    • Boosted bankroll extends playtime, enabling novices and savvies to relax and have fun for longer intervals.
    • Prolonged gameplay brings with it more chances to take something home.
    • Punters can change their bet sizing and go higher while staying free from fear of suffering financial meltdowns.
    • New player casino bonus of 400% often involves supplementary perks, such as bonus rounds in slots or loyalty points.
    • After all, youā€™re not risking your own pounds, which is already a wonderful scenario.

    Main Disadvantages

    Clearly, 400% deposit bonuses deserve attention, yet still, it's essential to remember that these offers sometimes come with defects. For example:

    • The fine print can be intricate, with endless restrictions and imperatives. Therefore, the T&C pages of casino promotions require careful scrutiny.
    • They are not reoccurring offers, so Brits cannot take advantage of them weekly, or even monthly.
    • Might include an unbeatable playthrough multiplier. Proposals with more than 35x wagering do not favour gamblers.

    How We Choose 400% Bonus Casino Promotions

    Our dedication to providing UK citizens with valuable content is reflected in our casino ranking method, specifically adapted to those promising 400% casino bonuses. About the promos under review, we compare offerings and their key features on different sites and then weigh them against industry standards. Our experts first look at min and max reward amounts, top-up limits, turnover needs and validity frames. We read accompanying terms from beginning to end to ensure our readers wonā€™t need to jump through redundant hoops to get bonus money as much as 400% of the upfront payment.

    Whatā€™s our ultimate goal? Here at Cardmates, we strive to empower you with all the insights needed to make informed choices about 400% first deposit bonus casino deals and their alternatives. This is what, in our view, largely secures a delightful, safe and rewarding gaming experience.

    UK Casinos With 400% Deposit Bonus Alternatives

    Jackpot City Casino
    United States of America Available in your country
    3.6 / 5.0
    Good
    reputation
    by cardmates.co.uk
    Welcome offer
    Welcome Bonus: 100% up to £100 + 100 FS

    #Ad 18+ Full T&C apply. BeGambleAware. New UK based customers only. Min. deposit: Ā£20+ via a debit card. Valid 7 days from registration. Free Spins on Gold Blitz once youā€™ve staked Ā£20 on any Games Global game. Spin value = 10p.

    Playzee Casino
    United States of America Available in your country
    3.8 / 5.0
    Good
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    by cardmates.co.uk
    Welcome offer
    Welcome Package: Up to £300 + 100 FS + 500 Points

    #Ad 18+ Full T&C apply. BeGambleAware. UK new players only. Min Dep Ā£20. Max Bonus Bet Ā£5. Offer: 100% of 1st deposit up to Ā£300 + 100 FS on Starburst + 500 Points. Winnings from each 10 spins capped at Ā£50 & credited as bonus. Bonus funds expire after 30 days, are separate to Cash funds, & subject to 35x wagering of bonus + deposit amounts.

    Spin Casino
    United States of America Available in your country
    4.5 / 5.0
    Excellent
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    by cardmates.co.uk
    Welcome offer
    Welcome Bonus: 100% up to £100 + 100 FS

    #AdĀ 18+. T&Cs apply. New players only. Min. deposit: Ā£20. Wager bonus 50x, for FS is not required. Valid 7 days. Stake contribution, games and payment method exclusions apply.

    FAQ

    šŸ‘€ Is 400% casino bonus a scam?

    No, but itā€™s essential that you register and place deposits on gambling sites that hold a valid UKGC licence. When you use percentage matches from regulated operators, you can be sure everything will be safe and fair. Always read the T&Cs of propositions before accepting any, as well as our expert casino reviews. Thatā€™s primarily because 400 per cent bonuses are not typical for the UK sector, and scam resources might simply trap you with such sweet proposals.

    šŸ’· What is the minimum deposit to claim a 400% bonus?

    Thereā€™s no one-stop lower limit, the minimal required amount changes from site to site. But, given our experience, 10 and 20 pounds sterling appear on the terms page of deposit match promotions more frequently than other sums.

    šŸ‘› Can I retain my profits from 400% casino bonuses?

    Yes, but you will be told to complete the wagering process first (in most cases). If you need a reminder, this involves placing a required number of stakes. Strive to go for bonus offers with low wagering; or, those that impose no wagering at all.

    šŸ§© Is 400% first deposit bonus available at any UK casino?

    No, absolutely not! The situation is the opposite: deposit matches of such volume are ubiquitous for British casinos. So, youā€™ll rarely come by one. Normally, your investment will be covered 50% or 100% up to the maximum amount.

    šŸ—æ Can existing players claim anything at a 400% bonus casino?

    In theory, yes this is possible. Returning customers might get matchup proposals with different percentages within reload or exclusive promos. But, typically, similar offers are more about rewarding new depositors.

    iGaming Expert on Cardmates