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The Best 300% Casino Bonuses

Any gambling site with a 300% casino bonus will surely impress prospective players. But which casinos actually grant this promotion, which is considered to be among the best online casino bonuses, and is quadrupling your initial deposit worth the strings attached? Read through our guide to find out all about this substantial offer!

Best Casinos Offering 300% Welcome Bonus

Not every online casino site has a 300% bonus; in fact, these promotions are quite rare. Luckily, though, we've done the searching and heavy lifting for you in our below list.

All the casinos we've recommended above are fully licensed and regulated, support trustworthy and convenient payment options, and are packed with loads of highly entertaining games!

What Is a 300% Bonus?

While a 100% bonus will double your deposit and a 200% bonus will triple it, an online casino 300% deposit bonus will go even further by making it four times your original amount! If you are fortunate enough to find an online casino with an offer of this type, chances are it is being presented as a one-off welcome bonus for new members.

This kind of offer is far less common than the standard 100% bonus, but with operators all in competition with each other to provide the very best casino bonuses around, do not be too surprised to find more and more casinos giving out 300% deposit offers to attract new members.

Bear In Mind Bear In Mind

Usually, these bonuses are available for a short time or require you to fulfil certain criteria (like signing up), and have terms and conditions you must meet before you are eligible to cash out.

Offers that are as generous-seeming as a 300% deposit bonus casino will never come without a few strings attached, so take a look to see what wagering requirements or time limits might apply before committing to depositing. The basic idea behind a 300% bonus is simple enough – your qualifying deposit will be multiplied by 300%.

Depositing €/£20 at a 300% casino means you get €/£60 in bonus funds, so you’ll get to play with €/£80!

In some cases, the bonus funds may only be used on certain casino games.

How To Claim a 300% Welcome Bonus Casino

The exact manner in which you claim a 300% bonus at an online casino will vary depending on the site. Having said that, the bonus in question is very likely to be a welcome offer intended specifically as a one-time gift for new members.

With that in mind, here are the steps towards activating the promotion:

  1. Browse through our above list of recommended casinos and pick one that suits you.
  2. Register a new account at the casino site.
  3. Read and understand all the bonus terms and conditions.
  4. Pick your preferred payment method and make a qualifying deposit. Then enter the bonus code if available.
  5. Visit the game lobby and play any of the eligible games.
  6. Complete the bonus wagering requirements and other terms of use.
  7. Cash out your bonus and winnings.

Top Tips on Using a 300% Bonus

Once you’ve got your hands on a 300% bonus, you will almost certainly be wondering about the best way to put this offer to good use to make sure that it is not wasted. Below is our overview of the nitty-gritty when it comes to both finding and getting the most out of this promo.

Different Types of 300% Bonuses

While it might seem that one 300% casino bonus will be much the same as another, in practice, there are several variables involved. For example, some might also come with free spins, while others will consist only of bonus cash. The maximum size of the deposit will be another factor to take into account.

<strong>Maximums Aren’t Obligatory!</strong> Maximums Aren’t Obligatory!

Of course, if you find a 300% bonus gambling site with a very large maximum bonus offered, there’s no obligation to deposit enough to earn that max. Always pay within your means, ultimately it’ll lead to a more enjoyable casino experience.

In addition, an increasing number of online casinos have adopted a “Wheel of Fortune” approach to welcome bonuses, where a new member will spin a wheel and win a randomly chosen promotion.

This might conceivably take the form of a 300% casino bonus, but it could also be something smaller, like a 100% or 50% bonus. On the other hand, it might turn out to be something even bigger. These days, even 400% welcome bonuses are not unheard of.

Finding the Top Casinos With a 300% Bonus

We have already recommended some of the best online casinos that offer this promotion. While compiling this list, we looked for:

  • the variety of games on offer;
  • the amount of payment methods accepted;
  • the size of the accepted withdrawal limit; and
  • how reliable the customer support is.

The good news is that there is nothing stopping you from registering at multiple casinos, meaning that you can take advantage of more than one 300% casino bonus!

<strong>Check the Terms of Use</strong> Check the Terms of Use

Different sites will have different terms and conditions, with some more lenient than others. Remember to pay close attention to the small print to make sure that the casino you are signing up to is right for you.

Additional Bonuses at 300% Casinos

When it comes to casino bonuses, the welcome bonus — even one as large as 300% — will typically only be part of the story. Most online casinos offer ongoing promotions, and these tend to vary significantly from casino to casino.

Some will be handed out daily, others weekly, and others will be seasonal. Certain promotions might grant free spins, or they could be ‘reload bonuses' that offer match bonuses on deposits (generally never up to 300%, of course — expect these to be lower sums, like 50% per week with a modest cap).

Online casinos sometimes even come with VIP schemes for loyal players that can award you additional perks.

So, when you select a 300% bonus gambling site to sign up to, do not forget to take a look at the other bonuses and promotions that are on offer. You might well be able to bag yourself some free spins and other perks on the side.

Customer Support

The terms and conditions attached to any casino bonus can be hard to get your head around, so it's a good idea to make sure that your chosen casino has reliable customer service that you can turn to in case you have any questions.

Check the “Contact Us” page or equivalent to see what methods of contact are provided (phone, email, or live chat) and when they are available (ideally, 24/7).

<strong>Using</strong><strong> Unlicensed Casinos</strong> Using Unlicensed Casinos

It goes without saying that licensed casinos are by far the most reliable and, at the end of the day, the only ones worth your time. If you don't see these credentials displayed at the bottom of the site, then avoid signing up, no matter how attractive the offers might seem.

Things To Keep in Mind: Hidden Costs & More

As any savvy casino player will be fully aware, bonuses never come free — even if online casinos sometimes tend to imply the opposite. To start with, you will typically need to deposit a certain amount of money.

Another thing to watch out for is that casinos that advertise having 300% bonuses might actually provide something quite different. For example, when you look at the details, these turn out to be split over two deposits: 100% on your first deposit, followed by 200% on your second deposit.

Wagering Requirements

Any wagering requirements attached to the bonus will need to be fulfilled before you can withdraw your bonus funds, with 300% deposit offering no exception to this rule.

So, let's say you've picked up £/€100 worth of funds with a wagering requirement of 30x. This means that you will need to wager at least £/€3,000 to fulfil the requirements.

There is also the possibility you have ended up with what is called a “sticky bonus“, in which case the wagering requirements will also include your initial deposit. So, if you deposited £/€25 for a 300% bonus that earned you an additional £/€75, you will still need to wager £/€3,000 to fulfil the requirements on the £/€100 total.

Always Check the Game Contributions Always Check the Game Contributions

Not all casino games contribute the same amount to wagering requirements. Typically, slots will contribute the most, while table and live dealer games contribute very little. To be absolutely sure, check these terms before claiming the bonus.

Withdrawal and Time Limits

Any casino bonus will typically come with an expiry date by which the promotion must be activated and the funds used – often, a space of seven days. If you have not wagered your bonus money by then, it will be deducted from your account.

Casinos also tend to put limits on cashing out your winnings: your withdrawal sum will need to fit into an accepted range before it can be processed.

What Games Can You Play With a 300% Casino Bonus?

There is a chance that your newly-claimed 300% deposit bonus will be limited to a specific set of games. Some sites restrict their welcome bonus to slot games, for example, while others will only allow you to use it on the live dealer games. Once again, make sure you check the terms and conditions of the online casino in question before making your first deposit to know exactly what you are obtaining.

Other Matched Deposit Bonuses to Check Out

If you like the sound of this bonus, then there are others you can check out.

Pros & Cons of a 300% Welcome Bonus

As we have shown throughout our article, while a 300% welcome bonus casino may sound like a dream, there will always be strings attached. It is a good idea, then, to weigh up the positives and negatives of the bonus before committing. The specifics will depend on the casino you have chosen, but here are the general pros and cons:


  • Quadruples your deposit amount
  • Sometimes comes with additional perks (e.g. free spins)
  • Easy to claim
  • Often average wagering requirements


  • Not easy to find
  • Strict terms and conditions


Armed with this knowledge, you can now venture forth and claim the offers at the 300% bonus gambling site that fits your needs most! Always remember to carefully check any strings attached, including any wagering requirements and potential limitations on the games you can spend your bonus cash on.

Above all, remember that playing online casino games should be fun! Never spend beyond your means, and always make sure you have a good bankroll management strategy in place.

300% Casino Bonus FAQs

Yes, you can. Just be sure that you check which games are eligible to play with the bonus beforehand by checking the attached T&Cs.

Yes, some online casinos offer free spins as part of their 300% welcome bonus.

Check out our full list above to find some of the best 300% casino bonus offers available!

You can claim a 300% sign-up bonus offer by creating an account at the site in question. In some cases, you may need to enter a promo code.

You need to check if the site is licensed by a trustworthy body, such as the Malta Gaming Authority or the UK Gambling Commission. Additionally, you can read user reviews online to find out what other players such as yourself think about the casino, and whether or not they had a good experience.

If you see different casinos with different bonus sizes or percentages, consider how much you will need to deposit in each one to qualify for the bonus. This should help you to decide. Note that certain casinos effectively decide for you by providing randomly chosen “wheel of fortune” welcome bonuses.

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Jake Schembri

Jake Schembri

Author Expert

With well over a decade’s worth of writing experience under his belt, Jake has created content for some of the most prominent casino operators in the industry, most notably Betsson and Betsafe. He enjoys getting into the nitty-gritty of what an operator is all about, leaving no stone unturned when it comes to providing candid, comprehensive, and objective insights.


ticksEditor since: 2023
ticksTotal posts: 242
ticksLanguages: English and Maltese


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