400% Bonus Sites

What is a 400% Deposit Bonus?

A 400% deposit bonus is exactly what it sounds like — the casino gives you four times the amount you deposit in bonus money. So if you make a £10 deposit, you’ll get an extra £40 in bonus funds, giving you a total of £50 to play with.

These bonuses are typically offered as part of a welcome bonus for new players and are one of the most generous online casino promotions you’ll find. Some casinos may offer the full 400% on your first deposit, while others spread the bonus across multiple deposits as part of a package.

It’s important to understand that this is a deposit bonus, meaning you must deposit real cash to claim it — this isn’t a no deposit casino offer. And like all casino bonuses, it comes with terms and conditions, including things like wagering requirements, game restrictions, and bonus expiry limits.

While the bonus value might be high, always check if there’s a maximum bonus cap. For example, some sites might say “400% up to £100”, meaning if you deposit £25, you’ll get the full £100 in bonus cash — but any deposit over that won’t get extra.

A 400% bonus gives you a solid head start — just make sure you check how far that bonus money really goes before you dive in.

Benefits of the Casino 400% Deposit Bonus

A 400% casino bonus is a special offer from online casinos. It aims to attract new players and reward current ones. This bonus matches the player’s deposit amount by 400%, giving them additional funds as a first deposit bonus.

The benefits of a 400% casino bonus are numerous. Firstly, it significantly increases your chances of winning by providing more funds. Secondly, it extends your gameplay, allowing you to enjoy your favourite casino games for longer. Lastly, it offers the opportunity to try out new games without risking too much of your own money.

This makes the 400% deposit bonus an attractive option for all players wanting to make their casino account funds go further. Who doesn't?

Minimum Deposit

The minimum deposit to claim a 400% casino bonus usually starts at £10, though some online casino sites might set the bar slightly higher at £15 or £20. This is the initial deposit you need to make to trigger the offer — and yes, it must be real deposit money, not bonus funds or free credits.

For example, if a casino offers “400% up to £100” and the minimum deposit required is £20, you’ll need to deposit at least that to unlock £80 in bonus money. Deposit less, and you might miss out — or worse, not qualify at all.

It’s also worth checking the minimum deposit limit for bonus eligibility specifically, as some casinos let you fund your account with less, but won’t apply the bonus unless you meet the full threshold.

And remember: not all payment methods are accepted for bonuses. If you're using e-wallets like Skrill or Neteller, double-check that they’re eligible — otherwise, your bonus cash might not be credited even if you meet the deposit amount.

Always read the bonus terms before you hit that deposit button — you don’t want to miss out over something small.

Free Spins

Some 400% casino bonuses don’t just boost your balance — they also come with free spins and a free bonus thrown in. These are usually part of the same welcome bonus, either unlocked with your first deposit or spread across your first few deposits as part of a package.

A typical offer might look like “400% up to £100 + 50 Free Spins on Starburst.” The number of spins can vary, and so can the slot they’re tied to — usually a specific slot game like Book of Dead, Big Bass Bonanza, or Fishin’ Frenzy.

Before you get spinning, always check the small print. Some casinos treat free spins as a separate bonus, with their own wagering requirements, bonus expiry, and maximum win limits. For example, free spins winnings may be capped at £20 or may need to be wagered 35x before withdrawal.

➡️ You’ll also want to confirm:

If spins are credited all at once or in batches

Which slots are eligible games

Whether you need a bonus code to activate them

Free spins bonuses are great for trying out new slot games without burning through your own money, but make sure you understand what happens with any bonus winnings before you start.

How the 400% Bonus Works

A 400% casino bonus multiplies your first deposit by four, giving you a massive head start without needing to commit much own money up front. So if you deposit £10, you’ll get £40 in bonus money, meaning you’ll start playing with £50 in total.

Sounds great, but here’s the bit most UK players miss: you’ll usually need to meet specific wagering requirements before that bonus cash becomes withdrawable. For example, a bonus with 40x wagering on the bonus amount would require you to bet £1,600 if you received £40 in bonus funds.

A few things to keep in mind:

⚠️ Maximum bonus caps may apply, even if you deposit more

⚠️ Some offers include free bets or bonus spins, but these may have their own terms

⚠️ Not all games will count the same toward wagering (spoiler: slot games usually do, live dealer games often don’t)

⚠️ Also, check for things like max bet limits, bonus expiry, and bonus balance conversion caps (e.g. max win of 5x the bonus).

Understanding how your bonus amount behaves is key. Otherwise, you risk turning your generous 400% deal into a lesson in frustration.

Eligible Games

Before you race off to play anything and everything, check which casino games you’re actually allowed to use your 400% bonus on. Not all games qualify — and some barely count toward your wagering requirements at all.

For most UK online casinos, your bonus balance will be limited to slot games. These usually contribute 100% toward wagering, which makes them the easiest way to clear a bonus. Popular titles like Book of Dead, Starburst, and Big Bass Bonanza are often on the list of eligible games.

If you’re into live casino games or table games like blackjack, roulette, or baccarat, things get trickier. Many casinos let you use your bonus on them, but only a small portion of your bets — sometimes as little as 10% or 20% — will count toward wagering. And in some cases? They won’t count at all.

It’s also common for some specific slot games to be excluded from bonus play entirely, or to have capped max wins.

‼️ TL;DR? Always read the game contribution table in the bonus terms, so you don’t accidentally blow through your balance on games that don’t move the needle.

Other Casino Bonuses

A 400% bonus sounds big — and it is — but it’s just one type of the many casino promotions and other bonuses you’ll find at online casino sites.

Here’s how it stacks up against the usual suspects:

✅ Match Deposit Bonuses

The most common type. These match a percentage of your first deposit — typically 100% casino bonus, 200%, or even 300%. A 400 casino bonus just pushes that to the extreme, giving you more bonus cash with less deposit money.

✅ No Deposit Bonuses

Rare these days, but still floating around. You get a small amount of bonus money or free bets credited to your account just for signing up — no deposit needed. Great for testing a site, but bonus values tend to be low and the bonus terms are often strict.

✅ Free Spins Bonus

Either standalone or bundled into a welcome bonus. You’ll get a set number of spins on a specific slot game, often with bonus winnings capped or subject to wagering requirements.

Or, some casino sites offer free spins no wagering requirements, so those are well worth a look.

✅ Reload Bonus

Reload bonuses are incentives for returning players, offering benefits such as a 50% or 100% deposit match on your second or third top-up. Some casinos provide reloads as part of a weekly casino promotion.

✅ Cashback Bonus

Less flashy, but simpler. Instead of getting a bonus balance, you get a percentage of your losses returned as cashback bonus — sometimes with no wagering.

Every casino site handles bonuses differently, so whether you’re after free spins, bonus play, or straight-up bonus money, always compare the bonus terms before claiming.

Which Games Can I Use My 400% Deposit Bonus On?

When you claim a 400% deposit bonus at an online casino, the games you can play with your bonus depend on the platform's rules. Most top online casinos clearly outline the eligible games, so checking this before you start playing is important.

For UK players, bonus funds usually focus on slot games. This is because slot games often have a 100% contribution to wagering requirements. Every pound you bet on slot machines counts fully toward meeting the playthrough terms. Popular titles like Starburst, Big Bass Bonanza, and Book of Dead are frequently included as eligible options for casino bonuses.

The situation might be different if you prefer live casino games, such as blackjack or roulette. While some UK casino gambling platforms allow you to use your online casino bonus on these games, they often have a lower contribution percentage (e.g., 10% or 20%) toward wagering requirements. This means a smaller portion of your bets will count toward clearing the deposit bonus.

For fans of casino table games or speciality games, it’s worth noting that not all casino games contribute equally. Some games may not count towards deposit bonus play. Always check the casino’s game contribution list to avoid surprises.

What Is the Minimum Deposit to Claim a 400% Bonus?

The minimum deposit required to claim a 400% casino bonus varies depending on the online casino you’re playing at. Generally, it falls somewhere between £10 and £20, but don’t take that as a given—each site sets its own rules, so always check the welcome bonus promotion details before you commit your first deposit.

If a casino is offering a 400% deposit bonus, it means that whatever you put in will be multiplied by four. So, if the minimum deposit is £10, you’ll receive £40 in casino bonus funds, giving you a total of £50 to play with. Sounds great, right?

Well, before you get carried away, remember that terms and conditions apply—not all games will contribute equally to wagering requirements, and some promotions may only be valid on specific eligible games like slots rather than table games.

UK players should also look out for bonus value caps, which can limit the maximum bonus amount you can receive. A 400% bonus sounds fantastic, but if the casino caps the welcome bonus funds at £100, you won’t get extra even if you deposit more. Likewise, if there are high wagering requirements, turning those bonus funds into withdrawable cash might take longer than you’d like. Game contributions vary. The game contributions can be different for live casino games. Keep an eye on the bonus expiry and wagering terms for every bonus you receive.

While a 400% first deposit bonus is a great way to boost your account balance, always check the fine print, including wagering requirements to ensure you’re getting the best deal.

Wagering Requirements for a 400% Bonus

Casino bonuses always come with strings attached, and a 400% deposit bonus is no exception. Wagering requirements are the casino’s way of making sure you actually play games before withdrawing online casino bonus funds. Simply put, you need to bet a certain multiple of your welcome bonus (or bonus + deposit) before you can cash out any winnings.

Let’s break it down. Say you claim a 400% casino bonus with a £10 deposit, giving you a £40 bonus balance. If the wagering requirements are 40x the bonus amount, you’d need to wager £1,600 (£40 x 40) before withdrawing any winnings. Sounds a bit brutal, right? Well, that’s why it’s always worth checking the terms and conditions before jumping in.

Games Contribute Differently

Not all games contribute equally towards wagering requirements. Slots usually count 100%, meaning every £1 wagered knocks £1 off your requirement. Table games and live dealer games often contribute less—sometimes only 10% or nothing at all. That means betting £10 on blackjack might only reduce your wagering by £1. Check the games' contributions before planning your gaming sessions.

Bonus Codes and Promo Codes

Some 400% deposit bonuses require a deposit bonus code or promo code when making your first deposit. If you forget to enter it, the bonus might not apply, and customer support may not be able to add it afterwards. Always double-check before depositing.

If we list a 400% casino bonus, we will let you know if there is a promo code that you need. Check out our exclusive offers page for anything we can offer that you won't find as a standard bonus offer.

Bonus Period and Expiry

Most casino bonuses come with a bonus period, meaning you have a limited time to meet the wagering requirements. This is usually between 7 and 30 days. If you don’t meet the requirements in time, the bonus balance and any winnings may be forfeited.

How to Track Wagering Progress

Most casinos have a section in your account settings where you can track your deposit bonus wagering progress. If you’re unsure whether you’re close to completing it, it’s always a good idea to contact customer support. They can confirm exactly how much you’ve wagered and how much more you need to go.

Is a 400% Casino Bonus Worth It?

While a 400% casino bonus can give you loads of extra funds to play with, the financial risk comes in meeting those wagering requirements. If they’re too high, you might find it tough to turn deposit bonus funds into real cash.

New customers should especially be cautious and always check the fine print before signing up.

Responsible Gaming with a 400% Bonus

A 400% casino bonus can be a great way to stretch your balance — but it’s still real money you’re playing with, even if it feels like free chips. Set a budget, stick to it, and don’t fall into the trap of chasing losses just because there’s bonus money involved.

Before you start spinning, make sure you’ve actually read the bonus terms, including the wagering requirements and max withdrawal rules. If the numbers look like a slog, don’t convince yourself it’s “just play money” — it’s still your time and money on the line.

Take breaks, avoid playing when tired or annoyed, and if things stop feeling fun, step back. All UKGC licensed online casinos offer responsible gaming tools like deposit limits, time-outs, and self-exclusion. Use them.

End of the day, this is entertainment — not a payday.

❌ Bonus Abuse and 400% Bonuses

Let’s be clear: bonus abuse is a fast way to lose your account — and yes, casinos are watching. A 400% bonus is generous, but try to bend the rules and you’ll likely get flagged.

What counts as abuse? Creating multiple accounts, placing max bets when the terms don’t allow it, using bonus funds on restricted games, or doing anything else that looks like you’re trying to game the system instead of just, you know, playing games.

Casinos take it seriously — and if they catch you, they won’t just void your bonus. You could lose your winnings, your account, and any shot at a future casino promotion.

So don’t guess your way through it. Read the bonus terms, check game restrictions, and if anything’s unclear, ask support before you start. A little caution beats having your balance nuked over a technicality.

Play fair, stay smart — and enjoy the bonus like it’s meant to be enjoyed.

Start Playing with Your 400% Casino Bonus

Claiming a 400% casino bonus is usually straightforward, but there are a few things to double-check before you hit that deposit button.

Here's how to claim it:

➡️ Choose a casino from our list that offers a 400% casino bonus

➡️ Register an account — make sure your details are accurate

➡️ Deposit money using an accepted method (check for exclusions like Skrill or Neteller)

➡️ Enter a bonus code or promo code if required — some offers won’t apply without it

➡️ Check that the bonus amount is credited to your casino account

From there, you can start playing right away — either with your bonus balance, or a mix of cash and bonus funds, depending on the casino’s rules.

⚠️ Don’t forget to read:

➡️ The wagering requirements

➡️ Bonus expiry (some only last 7–30 days)

➡️ Max bet limits while using bonus money

➡️ Eligible games for bonus play

Some sites also offer deposit deals like free spins or cashback on top of the bonus. Just make sure you’re clear on what you’re getting and how to use it before spinning those reels.

Always be GambleAware.

Looking for an even Bigger Casino Bonus?

Check out our list of - 

➡️ 500% casino bonus sites

FAQs for 400% Deposit Bonus

 

What is a 400% deposit bonus?

A 400% casino bonus is a type of deposit bonus where the casino matches your deposit amount by 400%. For example, if you deposit £10, the casino will add £40 in bonus funds. This gives you a total of £50 to play with.

Are there any wagering requirements for a 400% casino bonus?

Most 400% bonuses come with strict wagering requirements. This means you’ll need to bet the bonus amount a certain number of times before you can withdraw any winnings. Always check the terms and conditions to understand how much you’ll need to wager. There may be withdrawal limits on bonus winnings as well as a bonus expiry date. Some casinos now offer no wagering bonuses, but the bonus value is likely to be less.

Can I use a 400% casino bonus on any game?

Not always. Many platforms limit the online casino bonus to certain games, such as specific slots or table games. Slots often contribute 100% to wagering requirements, while other games, such as live dealer games, blackjack or roulette, may contribute less. Be sure to check which games are eligible at the online casinos before using your deposit bonus.

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

The minimum deposit needed for a 400% bonus changes from one online casino to another. It is usually between £10 and £20. The amount for the online casino bonus will be stated in the promotion details, so always check the gaming platform's qualifying deposit requirement before signing up.

Are 400% bonuses better than other casino bonuses?

A 400% bonus is great if you want a big boost to your initial deposit. It gives you more bonus money than lower percentages offered at most online casinos, like 100% or 200%. Higher bonuses can be generous rewards. However, it’s important to consider the wagering requirements and terms. This will help you decide if it’s the right one of the casino bonuses for you.

What about eligible payment methods?

This will depend on the casino platform, always check what deposit methods the online casinos accept before making your first deposit.