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Quick answer: A 400% casino deposit bonus gives you five times your deposit to play with, so a deposit of 100 becomes a 500 balance. These are among the largest match offers around, which means plenty of playtime but also the highest wagering requirements, so the terms are everything.
400% casino deposit bonuses are regarded by some as the holy grail of welcome offers. It is hugely popular, and it is easy to see why. A match this size lets you enjoy long sessions without worrying about your balance running low, giving you room to try all sorts of games and even run several sessions at once.
A good deposit bonus can shape your whole casino experience, and operators know it. These welcome packages, aimed mostly at new players, often bundle in extra perks alongside the headline match. We keep the list below current, adding operators and updating offers as they change, so what you see reflects the deals genuinely worth claiming right now.
The biggest 400% casino deposit bonuses are not just the ones with the largest headline percentage. The operators worth your time pair the match with fair wagering, a reasonable minimum deposit and a validity window long enough to clear the bonus comfortably. The list above is filtered with exactly those factors in mind. To compare match sizes, see our 200% deposit bonuses and 300% deposit bonuses pages.
Because a 400% match gives you five times your deposit to play with, the attached terms carry serious weight. A strong offer keeps the wagering multiplier sensible, applies it to the bonus where possible, and lets slots contribute fully towards the playthrough. Those details decide whether a generous looking bonus is realistic to clear.
Always review the minimum qualifying deposit, the maximum bonus amount and the list of eligible payment methods before committing. A deposit below the threshold will not trigger the offer, and some operators exclude certain e-wallets from bonus eligibility.
Hot Casino
Rated 83 of 100%
welcome bonus
400% up to €2200 + 350 FS
Best Casino 2025
Rated 98 of 100%
welcome bonus
400% Up to €2200 + 350 FS
Big Bonus
Rated 74 of 100%
welcome bonus
450% up to €4500 + 60 FS
Best Casino Silver
Rated 98 of 100%
welcome bonus
400% up to €2200 + 350 FS
Hot Casino
Rated 93 of 100%
welcome bonus
400% up to €2000 + 150 FS
Hot Casino
Rated 95 of 100%
welcome bonus
400% up to €2200 + 350 FS
New Casino
Rated 92 of 100%
welcome bonus
400% up to €2200 + 350 FS
Quality Brand
Rated 91 of 100%
welcome bonus
400% up to €1000 + 200 FS
Rated 86 of 100%
welcome bonus
400% up to €1600
Rated 97 of 100%
welcome bonus
400% up to €2200 + 350 FS
Rated 98 of 100%
welcome bonus
400% up to €2000 + 230 FS
Rated 97 of 100%
welcome bonus
400% up to €2150+ 300 FS
Industry News
Signing up and opening an account with one of the operators listed above is the quickest way to claim one of the 400% casino deposit bonuses on this page. The registration process is simple and straightforward, and every casino we review is certified, reputable and holds one or more active licenses.
Your account has to be confirmed before you can access the games. That means verifying your identity and uploading a personal document or two, which is a legal requirement every licensed operator must follow. The whole process rarely takes more than a few minutes.
The path to claiming a 400% bonus is short and consistent across operators:
The bonus is credited as soon as your deposit is confirmed. Worth knowing: the match is usually capped at a maximum amount, and a minimum deposit is required to qualify, so a small deposit may unlock only part of the headline figure. The same care applies to your first deposit and second deposit bonuses.
The key to withdrawing what you win from a 400% bonus is meeting the wagering requirements in full. Once you have played the bonus through the number of times the casino specifies, the terms are satisfied and your winnings become withdrawable. A bigger balance gives you more chances to win, but it also means a larger total to wager, so plan your sessions accordingly.
Not every game counts equally towards the requirement. Slots usually contribute 100%, so a 100 bet on slots counts as the full 100. The idea of a wagering requirement is standard across the industry. Many card and table games, such as blackjack, baccarat and video poker, often count only around 10%, which means they clear the bonus far more slowly. Sticking to full contribution games is the fastest route through the terms.
Like any welcome offer, a 400% deposit bonus is optional. You can play with your own deposited funds only, with no bonus active on your account. If a particular offer carries conditions that feel too steep for how you play, declining it is always a valid choice. The same logic applies across bonus types, from no deposit casino bonuses to cashback casino bonuses. If gambling ever stops being fun, free and confidential support is available through BeGambleAware.
The clearest way to judge one of the 400% casino deposit bonuses is to run the numbers. A 100 deposit with a 400 bonus turns into a 500 balance, but how much you must wager depends entirely on whether the requirement applies to the bonus only or to the deposit plus the bonus.
Deposit 100, claim a 400% bonus and you receive 400 in bonus funds. With a 35 times requirement on the bonus only, you multiply 400 by 35, which gives 14,000. That is the total you need to play through before any winnings can be withdrawn.
Take the same deposit and bonus, but now the 35 times requirement applies to the deposit plus the bonus, which is 500. Multiply 500 by 35 and you get 17,500. The headline offer is identical, yet the playthrough is 3,500 higher, which is exactly why the wagering basis matters so much on large bonuses.
Use this checklist when weighing one 400% offer against another. The factors on the left make a large bonus realistic to clear, while the ones on the right are worth a closer look before you commit.
| Factor | Player friendly | Less favourable |
|---|---|---|
| Wagering basis | Bonus only | Deposit plus bonus |
| Wagering multiplier | 25x to 35x | 40x or higher |
| Maximum bonus | High and clearly stated | Low cap on a big percentage |
| Validity period | Two weeks or more | A few days |
| Game contribution | Slots count 100% | Card games count around 10% |
A 400% casino deposit bonus matches your deposit at four times its value. Deposit 100 and you receive 400 in bonus funds, giving you a 500 starting balance subject to the offer terms.
It depends on the multiplier and the wagering basis. With a 35 times requirement on a 400 bonus you would wager 14,000 if it applies to the bonus only, or 17,500 if it applies to the deposit plus bonus.
A 400% bonus gives a lot of extra playtime, but it also comes with the highest total wagering. It is worth it when the terms are fair, the multiplier is sensible, the maximum bonus is generous and slots count fully.
Slots usually contribute 100% towards the wagering requirement, so they clear the bonus fastest. Card and table games such as blackjack or baccarat often count only around 10%, which is much slower.
Yes. Each offer sets a minimum qualifying deposit, and a deposit below that amount will not trigger the bonus. The match is also usually capped at a maximum amount, so check both before depositing.
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