400% deposit bonuses can be far and few between at UK online casinos. But, if you come across the right one, you’ll know you’ve found a real gem. On this page, we share all of the essential information about this rare casino bonus. This way, you’ll know exactly what to do when you find one. Here, you’ll also find links to the best easier-to-spot bonuses so that you have plenty of viable options to get your casino journey started.
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.
First-time depositors only (18+ country restrictions apply). Min deposit: £10. Max offer: £20 Games Bonus & 100 Free Spins (on a game of our choice). Promo code: SPINIT. Any Games Bonus winnings, if applicable, must be wagered 60x before withdrawal. Any Free Spins winnings, if applicable, will be credited as bonus funds and capped at £10. FS are valid for 7 days and any winnings must be wagered 40x before withdrawal. Games Bonus win cap: £100 + original bonus amount. Wagering contribution varies by game. We reserve the right to deny bonuses based on abusive bonus activity across sites operated by the Company. Deposit balance is available for withdrawal at any time (UK only). General withdrawal restrictions & full T&Cs apply. Valid until 31.12.2022
First-time depositors only (18+ country restrictions apply). Min deposit: £10. Max offer: £20 Games Bonus & 100 Free Spins (on a game of our choice). Promo code: SPINIT. Any Games Bonus winnings, if applicable, must be wagered 60x before withdrawal. Any Free Spins winnings, if applicable, will be credited as bonus funds and capped at £10. FS are valid for 7 days and any winnings must be wagered 40x before withdrawal. Games Bonus win cap: £100 + original bonus amount. Wagering contribution varies by game. We reserve the right to deny bonuses based on abusive bonus activity across sites operated by the Company. Deposit balance is available for withdrawal at any time (UK only). General withdrawal restrictions & full T&Cs apply. Valid until 31.12.2022
New players only. Min Dep £20. Max Bonus Bet £5. Offer: 100% of 1st deposit up to £250 + 100 Yoo Spins on Starburst, Book of Dead, Fire Joker, Gonzo's Quest, & Big Bass Bonanza respectively (first 20 credited on 1st deposit; rest credited at 07:00GMT at 20/day). Spins expire after 23:59GMT on day they’re credited. Winnings from each 20 spins capped at £50 & credited as bonus. Bonus funds expire after 30 days, are separate to Cash funds, & subject to 35x wagering of bonus + deposit amounts. Only bonus funds contribute to wagering requirements. Bonus funds can only be used on slots.
New players only. Min Dep £20. Max Bonus Bet £5. Offer: 100% of 1st deposit up to £250 + 100 Yoo Spins on Starburst, Book of Dead, Fire Joker, Gonzo's Quest, & Big Bass Bonanza respectively (first 20 credited on 1st deposit; rest credited at 07:00GMT at 20/day). Spins expire after 23:59GMT on day they’re credited. Winnings from each 20 spins capped at £50 & credited as bonus. Bonus funds expire after 30 days, are separate to Cash funds, & subject to 35x wagering of bonus + deposit amounts. Only bonus funds contribute to wagering requirements. Bonus funds can only be used on slots.
100% bonus on first deposit up to £50 & 20 Bonus Spins. Bonus spins are credited immediately and are valid for Rich Wild and the Book of Dead slot only. Min first deposit £20. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply. Further Terms Apply
100% bonus on first deposit up to £50 & 20 Bonus Spins. Bonus spins are credited immediately and are valid for Rich Wild and the Book of Dead slot only. Min first deposit £20. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply. Further Terms Apply
For new UK customers who registers via mobile; Wager £10 on Slots to release 40 Free Spins in Gladiators Go Wild; Opt in via the Promotions page to claim 10% weekly Slots Cashback; Free Spin stakes not returned; No wagering requirements on winnings; £100 max free spin winnings; 10 no deposit Free Spins credited in Gladiators Go Wild upon first login; T&C’s apply; 18+. T&C's Apply. Please bet responsibly. begambleaware.org
For new UK customers who registers via mobile; Wager £10 on Slots to release 40 Free Spins in Gladiators Go Wild; Opt in via the Promotions page to claim 10% weekly Slots Cashback; Free Spin stakes not returned; No wagering requirements on winnings; £100 max free spin winnings; 10 no deposit Free Spins credited in Gladiators Go Wild upon first login; T&C’s apply; 18+. T&C's Apply. Please bet responsibly. begambleaware.org
£10 min deposit. £5 max bet using bonus. 60x (40x referred player) wagering applies. Bonus valid for 14 days. 30 spins on pre-selected games will be credited instantly + then 30 per day for 9 days. Free spins valid for 72 hours from credit. Max free spins winnings £100. Ewallets excluded.
£10 min deposit. £5 max bet using bonus. 60x (40x referred player) wagering applies. Bonus valid for 14 days. 30 spins on pre-selected games will be credited instantly + then 30 per day for 9 days. Free spins valid for 72 hours from credit. Max free spins winnings £100. Ewallets excluded.
£10 min deposit. £5 max bet using bonus. 60x (40x referred player) wagering applies. Bonus valid for 14 days. 30 Spins will be credited instantly upon qualifying deposit + then 30 per day for 9 days on pre-selected games. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Ewallets excluded.
£10 min deposit. £5 max bet using bonus. 60x (40x referred player) wagering applies. Bonus valid for 14 days. 30 Spins will be credited instantly upon qualifying deposit + then 30 per day for 9 days on pre-selected games. Free Spins valid for 72 hours from credit. Max Free Spins winnings £100. Ewallets excluded.
Opt-in required. This offer is valid for selected customers only, until 25th August 2021 23:59 TCS. 50 Bonus Spins are awarded upon successful 1st deposit. 10% match bonus up to £50 on 1st deposit of £10+. 10 bonus spins credited on a daily basis for 5 days. Winnings from bonus spins are subject to wagering of 30x playthrough requirements. Irregular gameplay may invalidate your bonus. Debit card deposits only. This offer is valid for 7 days from when your new account being registered. Other conditions apply. Bet The Responsible Way.
Opt-in required. This offer is valid for selected customers only, until 25th August 2021 23:59 TCS. 50 Bonus Spins are awarded upon successful 1st deposit. 10% match bonus up to £50 on 1st deposit of £10+. 10 bonus spins credited on a daily basis for 5 days. Winnings from bonus spins are subject to wagering of 30x playthrough requirements. Irregular gameplay may invalidate your bonus. Debit card deposits only. This offer is valid for 7 days from when your new account being registered. Other conditions apply. Bet The Responsible Way.
Min. deposit £10. Bonus: 1st deposit 100% up to £300 + 30 bonus spins (Reactoonz), 2nd deposit 50% up to £500 + 50 bonus spins (Book of Dead), 3rd deposit 25% up to £200 + 20 bonus spins (Legacy of Egypt). Spins on specified games only. Bonus money is separate to Cash funds & subject to 35x wagering requirement. £5 bonus max. bet. Bonus must be used within 30 days, spins within 10 days, otherwise any unused will be removed. Only bonus funds contribute towards wagering requirements.
Min. deposit £10. Bonus: 1st deposit 100% up to £300 + 30 bonus spins (Reactoonz), 2nd deposit 50% up to £500 + 50 bonus spins (Book of Dead), 3rd deposit 25% up to £200 + 20 bonus spins (Legacy of Egypt). Spins on specified games only. Bonus money is separate to Cash funds & subject to 35x wagering requirement. £5 bonus max. bet. Bonus must be used within 30 days, spins within 10 days, otherwise any unused will be removed. Only bonus funds contribute towards wagering requirements.
Min deposit £20. Bonuses to a max of £100 + 50 bonus spins. Wagering bonus 35x. Wagering bonus spins 35x. Max bonus bet £5. The winnings must be wagered within 7 days. Bonus T&Cs apply.
Min deposit £20. Bonuses to a max of £100 + 50 bonus spins. Wagering bonus 35x. Wagering bonus spins 35x. Max bonus bet £5. The winnings must be wagered within 7 days. Bonus T&Cs apply.
Min Deposit £20 Max Bonus Bet £5 Winnings from spins capped at £50 100 Zee Spins valid on Starburst (first 10 credited immediately upon first deposit; rest credited at 07:00 GMT at 10/day). Spins must be used by 23:59 GMT of the day on which they are credited to player account, any unused shall be removed. Bonus funds must be used within 30 days. Bonus funds are separate to Cash funds, and subject to 35x wagering (bonus + cash). Terms apply. Play Responsibly.
Min Deposit £20 Max Bonus Bet £5 Winnings from spins capped at £50 100 Zee Spins valid on Starburst (first 10 credited immediately upon first deposit; rest credited at 07:00 GMT at 10/day). Spins must be used by 23:59 GMT of the day on which they are credited to player account, any unused shall be removed. Bonus funds must be used within 30 days. Bonus funds are separate to Cash funds, and subject to 35x wagering (bonus + cash). Terms apply. Play Responsibly.
100% bonus on first deposit up to £50 plus 50 Bonus spins (30 spins on day 1, 10 on day 2, 10 on day 3 for Rich Wilde and the Book of Dead slot only. Min first deposit £20. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply. Further Terms Apply.
100% bonus on first deposit up to £50 plus 50 Bonus spins (30 spins on day 1, 10 on day 2, 10 on day 3 for Rich Wilde and the Book of Dead slot only. Min first deposit £20. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply. Further Terms Apply.
100% up to £100-300 + 50-150 Free Spins (Depending on How Much You Deposit)
One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st
deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£99: max
£100 bonus + 50 spins on selected games; £100-£200: max £200 bonus + 100 spins on selected
games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins
credited as bonus and capped at £100. Bonus funds are separate to cash funds & subject to wagering
requirement (35x deposit + bonus). Only bonus funds contribute to wagering requirement. Bonus
funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Terms Apply. Please
gamble responsibly.
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Dream Vegas
TOTAL WELCOME PACKAGE
Up to £300 + 150 Free Spins
1ST DEPOSIT BONUS
100% up to £100-300 + 50-150 Free Spins (Depending on How Much You Deposit)
One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st
deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£99: max
£100 bonus + 50 spins on selected games; £100-£200: max £200 bonus + 100 spins on selected
games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins
credited as bonus and capped at £100. Bonus funds are separate to cash funds & subject to wagering
requirement (35x deposit + bonus). Only bonus funds contribute to wagering requirement. Bonus
funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Terms Apply. Please
gamble responsibly.
Min £10 deposit & wager. 30 day expiry from deposit. Free Spins: on Double Bubble. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply.
Min £10 deposit & wager. 30 day expiry from deposit. Free Spins: on Double Bubble. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply.
No Deposit Bonus: Register and get up to 30 free spins (FS). 10 FS x 3 on selected slots over 3 days (10 FS per day upon log in). Must be claimed by 23:59 on day of grant & valid for 7 days once claimed. FS wins granted in bonus after all FS used: wins set at £1-4 (per 10 FS). Reg bonus wins capped at £100 exec. jp. wins. Wagering req apply: 30x bonus funds (vary by game). 1st Deposit Bonus: Offer only valid on a player's 1st deposit at Wink Slots. Min deposit £10 o get 100% bonus (max £100) + 30 free spins (FS). FS available on specific games for 7 days. FS wins are granted in games bonus after all FS used. Bonus wins capped at £400. To withdraw games bonus & related wins, wager 30x the amount of bonus. Wagering req vary by game. Deposit balance can be withdrawn at any time.
No Deposit Bonus: Register and get up to 30 free spins (FS). 10 FS x 3 on selected slots over 3 days (10 FS per day upon log in). Must be claimed by 23:59 on day of grant & valid for 7 days once claimed. FS wins granted in bonus after all FS used: wins set at £1-4 (per 10 FS). Reg bonus wins capped at £100 exec. jp. wins. Wagering req apply: 30x bonus funds (vary by game). 1st Deposit Bonus: Offer only valid on a player's 1st deposit at Wink Slots. Min deposit £10 o get 100% bonus (max £100) + 30 free spins (FS). FS available on specific games for 7 days. FS wins are granted in games bonus after all FS used. Bonus wins capped at £400. To withdraw games bonus & related wins, wager 30x the amount of bonus. Wagering req vary by game. Deposit balance can be withdrawn at any time.
Min deposit £10. Welcome package splits over 3 deposits. 35x wagering requirement applies to match up bonus. Offer valid for 1 week. 100 spins split to 20 spins a day for 5 days. 50x wagering applies to spins.
Min deposit £10. Welcome package splits over 3 deposits. 35x wagering requirement applies to match up bonus. Offer valid for 1 week. 100 spins split to 20 spins a day for 5 days. 50x wagering applies to spins.
100% bonus on first deposit up to £100 & 50 Bonus Spins for Book of Dead slot only. Min first deposit of £20. Max bonus £100. 50 Bonus Spins credited on first deposit. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expire after 48 hours. Game restrictions apply. Further Terms Apply.
100% bonus on first deposit up to £100 & 50 Bonus Spins for Book of Dead slot only. Min first deposit of £20. Max bonus £100. 50 Bonus Spins credited on first deposit. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expire after 48 hours. Game restrictions apply. Further Terms Apply.
100% bonus up to £100 + 50 bonus spins on Book of Dead
Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly.
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Casimba
TOTAL WELCOME PACKAGE
Up to £150 + 50 bonus spins
1ST DEPOSIT BONUS
100% bonus up to £100 + 50 bonus spins on Book of Dead
Min deposit £20. Max bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £200 + 50 Bonus spins on your 1st deposit, and 50% bonus match up to £50 on your 2nd deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly.
One bonus offer per player. Minimum deposit of £20. Max bonus bet £5. This offer gives you a 125% match bonus up to £100 and 100 bonus spins. Bonus spins are valid on the following game(s) only: Gonzo’s Quest and Starburst. Bonus spins to be credited at a rate of 20 bonus spins per day over five days, triggered on your first deposit. Bonus spins winnings credited in the form of bonus funds and capped at £50. Bonus funds must be used within 30 days and bonus spins within 10 days, otherwise any unused shall be removed. Bonus funds are separate to Cash funds and are subject to 35x wagering on the bonus funds only. Affordability checks apply. Terms apply. Play Responsibly.
One bonus offer per player. Minimum deposit of £20. Max bonus bet £5. This offer gives you a 125% match bonus up to £100 and 100 bonus spins. Bonus spins are valid on the following game(s) only: Gonzo’s Quest and Starburst. Bonus spins to be credited at a rate of 20 bonus spins per day over five days, triggered on your first deposit. Bonus spins winnings credited in the form of bonus funds and capped at £50. Bonus funds must be used within 30 days and bonus spins within 10 days, otherwise any unused shall be removed. Bonus funds are separate to Cash funds and are subject to 35x wagering on the bonus funds only. Affordability checks apply. Terms apply. Play Responsibly.
Min. deposit £20. Max. bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £300 + 50 Bonus spins on your 1st deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly.
Min. deposit £20. Max. bonus bet £5. Bonus spins on selected game only and must be used within 72hrs. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire within 30 days. Offer is 100% bonus match up to £300 + 50 Bonus spins on your 1st deposit. Bonus funds are separate to cash funds & subject to wagering requirement (35x deposit + bonus). Only bonus funds contribute towards wagering requirement. Affordability checks apply. Terms apply. Please gamble responsibly.
100% bonus on first deposit up £50 & 100 Bonus spins (50 spins on day 1, 25 on day 2, 25 on day 3) for Book of Dead slot only. Min first deposit of £20. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expire after 48 hours. Game restrictions apply. Further Terms Apply
100% bonus on first deposit up £50 & 100 Bonus spins (50 spins on day 1, 25 on day 2, 25 on day 3) for Book of Dead slot only. Min first deposit of £20. Max bonus £50. Max bonus bet £5. Max bonus cash-out £250. 40x wagering requirements. Bonus expiry 30 days. Bonus spins expire after 48 hours. Game restrictions apply. Further Terms Apply
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:
Find a casino that offers a 400% deposit bonus. You can browse our list for some ideas.
Join the casino by creating a new account, and be sure to read the bonus terms.
Register your preferred payment methods for depositing/withdrawals.
Deposit at least the minimum required amount.
If required, enter a promotional bonus code supplied by the casino.
Activate your bonus by loading your chosen slot or table game in the games lobby.
When the real money balance runs out, you can carry on playing with your bonus money.
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
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!
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