The Best 300% Casino Bonus on British Online Casinos

As a new player, you always want to pick a casino site with an incredible 300% casino bonus. All gambling sites feature slot machines and table games, and most offer live casino products. But what sets them apart are different match deposit bonuses.

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By Lars Wahlström - Updated 2023-09-11

Reading Time: 14 minutes

300% Casino Bonus: The Essentials

If you want a 300% casino bonus, Casinoclaw will make your search easy. Our primary focus is on valuable casino offers for players like you. With our 300% bonuses, you'll discover hidden gems that will make your gaming experience three times more enjoyable.

In truth, these platforms are committed to top-notch customer satisfaction. Bonus casinos are reliable, respect players, and reward them immensely.

Getting a 300% casino bonus on your first deposit will put you on the path to making real money. Of course, you must play many casino games because bonus funds come with wagering requirements. After all, that's what you are there to do anyway.

Online casino bonuses can earn you considerable money by spinning the reels on slot games. So, register your new account today and start playing at a 300% welcome bonus casino.

300% Casino Bonus Banner

300% Deposit Bonus

A 300% casino welcome bonus can be had on some of the most trusted British online casinos. You can get them in your welcome package as a new player or as a reload bonus. But the best part is that you can claim these massive deals on dozens of gambling sites.

You can take full advantage of them by calculating how much you can win and betting on big-payout casino games. So long as you stay inside the betting limits and don't let the bonus expire, we are sure you will do great.

Find the best 300 first deposit casino bonus today and watch your balance grow!

The Best 300 Casino Deposit Bonus Deals in the United Kingdom for 2023

Many of the best online casinos present 300 casino bonus offers and loads of free spins. They feature low minimum deposit requirements, fair bonus terms, and many payment methods.

Image for the section The Best 300 Casino Deposit Bonus Deals in Canada for 2023. It shows the Casinoclaw mascot, a 'best choice' banner, and the number 300.

With this in mind, here are our best welcome packages with a 300% casino bonus:

300 Match Bonus CasinoSign-Up Bonus and Deposit Offers
💣 Mr Bet Casino400% deposit bonus of up to £2250 (for the 1st deposit, 2nd deposit, 3rd deposit, and 4th deposit).
💣 Stelario Casino300% initial deposit bonus of up to £1600 and 275 free spins.
💣 VIPSlotClub300% matched bonus amount up to £4200 and 300 extra spins.
💣 Lady Linda Slots300% matched new casino bonus of up to £1000 on crypto and fiat deposits.
💣 BurningBet290% bonus money for deposits up to £850 and 300 free spins.
💣 Izzi Casino300% match bonus up to £1500 and 500 free spins.
💣 Wheelz Casino400% first deposit boost up to £20.

What is a 300% Casino Bonus?

Firstly, there are different kinds of casino welcome bonuses for online gambling. The deposit bonus with an optional bonus code is a common one. That is when the casino matches a portion of your deposit amount with house money. Thus, you have a bigger initial bankroll to gamble with.

Welcome packages for new players come in various forms. Still, the most popular and lucrative types are deposit and no-deposit bonuses.

A deposit bonus is usually a match bonus for new players. It means the casino will match your deposit to a certain percentage. However, reload bonuses, like the second deposit bonus, are also frequent.

Typically, casino providers match bonuses flat out. If you deposit £100, they give you £100 and some bonus spins. In this case, you have £200 as a mixture of your money and bonus cash.

On the positive side, some sites offer a casino 300 bonus on deposits. If you claim bonuses like that, your £100 will earn you £300 in bonus funds. That £400 combo of a first deposit bonus and your real money will get you a long way. It's even better because only £100 of it was yours.

In our opinion, a 300 deposit bonus casino is the best bonus available.

It's an excellent way to boost your casino account bankroll and give yourself a better chance to cash out big.

What is a 300% Casino Bonus?

Why Does a Gambling Site Offer a 300% Casino Bonus?

Both high rollers and new players can fully utilize a casino bonus 300 match offer. There are numerous reasons why such promotions exist.

  • They allow you to test new casinos without investing significant money.
  • Jackpot games and exclusive bonuses are the best ways to attract new players and turn them into loyal customers.
  • A 300 deposit bonus casino is also perfect for testing new games you have yet to become familiar with.
  • By giving you bonus funds, online casinos lengthen your gameplay.
  • A 300% casino bonus builds trust and shows respect toward bettors.
  • Finally, they enable players with shallow pockets to sign up and play on multiple casino sites.

Getting the Most Out of Your 300% Casino Bonus

There's no doubt that a 300 sign up bonus casino are superb for boosting your bankroll. But they can be slightly confusing. Knowing which is right for you with many bonuses can be tricky. Here are a few tips to help you make the most of your 300 casino bonus:

  • Before doing anything else, read the T&Cs carefully and familiarize yourself with the bonus specifics.
  • Assess and determine the potential winnings from your 300% bonus to understand what to expect.
  • Apply thoroughly tested strategies to increase your odds of winning with massive promotions.
  • After that, check the game selection to see which ones you can use your bonus on.
  • Take full advantage of reload bonuses. These 300 welcome bonus casino promos are available when you fill your account with more money. They help you recover and come back if you hit a losing streak.
  • Complete the wagering requirements before the 300 casino deposit bonus expires.
  • Stay within the 300% casino bonus betting limits.
  • Lastly, don't be afraid to ask for help. If you need help with how a particular bonus works, contact customer support; they'll gladly assist you.

By following these tips, you will get the most out of your next 300 casino welcome bonus.

Getting the Most Out of Your 300% Casino Bonus

Estimating Your Potential Winnings

New players need help figuring out how a 300% deposit bonus works. After you top up your casino account, you will get a matched bonus that increases your final balance. As a result, your wallet will hold a real money deposit + bonus money.

Look at the following two examples for more details:

Initial Deposit300% Match BonusFinal Balance

Increase the Odds of Winning with a 300% Casino Bonus

Playing with 300% bonus amounts significantly improves your chances of winning big. In addition to the money you came with, you have three times that amount at your disposal. That guarantees lengthy gaming sessions and more ways to trigger jackpots.

Consider the below methods to get the most out of your casino 300 bonus:

  • Use the bonus on high-RTP games with the biggest payout rates. We don't suggest games below 95% in our casino reviews.
  • Manage your wagers, ensuring you are always within the allowed betting limits. You can make smaller or bigger bets depending on how much of a risk-taker you are.
  • Learn the rules of the casino games you play and use a winning strategy.
  • Activate a 300% casino bonus on a site with low wagering requirements. For instance, we like bonuses with playthrough requirements of 30x or less.
  • Remember to use cashback offers if you lose. They are an additional opportunity to win.

Read the Bonus Terms and Conditions Before Activating and Claiming a 300 Casino Welcome Bonus

First and foremost, read the Casino Bonus T&Cs carefully. Every online casino has different wagering requirements. In either case, you must bet a certain amount of money to withdraw your winnings. Keep in mind that gambling sites have different rules about wagering contributions from casino games.

Most online casinos also have restrictions for minimum deposits to claim a promo. Usually, these are pretty low, and the deposit amount shouldn't be a problem. Check beforehand to avoid uncertainties.

Additionally, many casino sites limit the games you can play with bonus funds. Some providers exclude table games, progressive jackpots, or live dealer games from their welcome bonuses. That's because table games like Blackjack, Roulette or Baccarat typically have a lower house edge.

As such, it's essential you are aware of the Casino Bonus Terms and Conditions to benefit from a 300% casino bonus.

Check Which Games are Eligible for the Bonus

Many 300 deposit bonus casino platforms have a list of previously selected casino games that qualify for promotions. If you admire a specific title, research to see if you can play your bonus on it.

All in all, the grandest casino bonus offers usually work best on slot games. You might be out of luck if you intend to apply it to roulette or video poker. We advise our players to read the accompanying documentation where the casinos list the accepted games.

Pick one you know and feel comfortable with to land you the biggest wins.

Complete all Wagering Requirements Before the 300 Casino Welcome Bonus Expires

Casino promotions aren't endless and come with an expiration date. Once you activate it, the countdown starts running, and you must roll the bonus over in time. You can read about the specific time requirements in the rules and T&C.

Certain 300% casino bonus deals require entering a promo code during sign-up or activation. We keep track of the latest bonus codes on

Major deposit bonuses are usually valid for 30 days after activation. That isn't a rule, as the expiration date can arrive much faster. Some casinos require that you play through the bonus funds within 10 or 20 days.

Casino 300 bonus deals often come with free spins as part of the welcome package. Don't be surprised if these extra spins expire faster than the bonus money.

That's why it's essential to read the terms and understand the conditions of the claimed bonuses. If the promo deals expire and you don't meet the wagering requirements, the casino will take back the free bonus cash.

Respect the 300% Casino Bonus Betting Limits

Wagering limitations are integral to most welcome bonuses and promotions. The rules explicitly state how much you can or can't bet as part of the promo deal. There are minimum and maximum betting limits that you must stay within. Betting above or below these margins can result in a forfeit of the bonus.

Here is an example to make this as clear as possible:

Betting LimitWhat is AllowedWhat Isn't Allowed
£0.10 – £10£0.10, £0.50, £2, £5, £10£0.01, £0.05, £20, £50, £100

The Latest and Greatest 300% Casino Bonuses

New Online Casino300 Casino Welcome Bonus
BC Game CasinoA 240% welcome bonus with 35x wagering requirements.
SlotsNBets Casino800% bonus money for deposits up to £3000.
Conquestador Casino200% match bonus and 200 free spins.

There are many reasons new online casinos may attract players. Maybe the feeling isn't there at your favourite gaming destination anymore. Or you have gotten bored of the casino game offering and want a change.

Nevertheless, one of the most common reasons is these casinos' welcome bonuses. New players are super important if you start an online casino.

There is no better way to attract gamblers than a juicy, exciting 300 casino bonus.

Casinos that have been operational for years are not equally as dependent on new players. That's why the best bonuses are waiting for you in new casinos. Many new gambling sites now offer s 300% casino bonus. It's a generous offer that can significantly boost your profit margins.

We have collected the best new 300 match bonus casino sites in our thoroughly curated list. A 300% deposit bonus as a little extra value when signing up at a new casino can be hard to resist.

The Latest and Greatest 300% Casino Bonuses

How to Claim a 300 Casino Welcome Bonus in 5 Steps

You might think claiming and using a 300% deposit bonus is hard, but it isn't. It's pretty straightforward, and we will explain it in 5 simple steps you can follow.

  1. Create your casino account.
  2. Deposit money using a safe payment method suitable for Brits.
  3. Receive and use your deposit bonus.
  4. Apply our tips and recommendations to complete the wagering requirements for your 300% casino bonus.
  5. Cash out your winnings.
How to Claim a 300 Casino Welcome Bonus in 5 Steps

Create a Casino Account to Recieve your Bonus

The first step is self-explanatory and requires selecting a suitable casino from our list. For this reason, we write casino reviews to make your job as pleasant as possible.

Registering an account takes a short time. When signing up, enter your personal information (name, address, age, email, phone number, etc.). Another mandatory step in most online casinos is going through KYC and verifying your identity. Depending on the site, you must do it while registering or requesting your first withdrawal.

Deposit Money Using a Popular Payment Method

A 300 match bonus casino offer becomes available after making an acceptable deposit to your account. You must be aware of what the minimum deposit amount is to claim your promotion. Online casinos support dozens of excellent banking options. For example:

E-WalletsSkrill, Neteller, WebMoney, MuchBetter, PayPal, Jeton, EcoPayz, EcoCard
Credit and Debit CardsMasterCard, Visa, American Express, Discover
Wire Transfers and Instant BankingiDebit, Citadel, eCheck
CryptocurrenciesBitcoin, Ethereum, Litecoin, Bitcoin Cash, Ripple, Dogecoin, Tether
Prepaid CardsRevolut, Paysafecard, AstroPay, Neosurf

Receive and Use Your 300% Casino Bonus

With attention to 300 deposit bonus casino promotions, there are usually two ways to claim them. You can place a tick to activate the bonus when depositing, or you must enter a bonus code.

Soon after you receive your bonus money, you can begin playing and wagering through it. Contact customer support if you have questions or if the casino didn't credit your bonus correctly.

Image for the section Receive and Use Your 300% Casino Bonus. It shows the Casinoclaw mascot, a wallet with a question mark next to it, and a claim form.

Tips and Recommendations for Completing Wagering Requirements

Completing the wagering requirements is the only way to turn bonus funds into real money. Hence, you need to know how to do that. The playthrough rules state how many times you must wager the bonus to safely put it in your pockets.

Your 300 welcome bonus casino may require a 30x rollover. In essence, you will have to wager the money you received for free 30 times. A 300% match deposit of £100 requires reinvesting the funds to a total of £3000. Thus, to complete the wagering requirements as quickly as possible, do the following:

  • Play online slot machines, as they contribute 100% to the rollover rules compared to live dealer games or table games.
  • Pick an online casino with a 300% casino bonus and the lowest possible wagering requirement. In our opinion, 10-30x is good; 50-70x is not worth it.
  • Track your progress and spending to know how far you have come and how much more you need to wager.
  • Combine high-variance slots with low-volatility ones. In short, a winning strategy is getting a big payout and then playing it safe on slots that pay frequently.
  • Only request a withdrawal once you are 100% sure you have met the wagering requirements. A premature withdrawal invalidates the casino bonus 300 and cancels the winnings that came with it.

Cash Out Your Winnings After Completing the Playthrough Requirements

The last step is indeed the sweetest. It involves withdrawing your winnings into your private wallet. If you haven't undergone KYC yet, it's at this step that the casino site will ask you to do it. After all, their goal is to protect honest players and ensure the right people are getting paid.

Casinoclaw research shows that some casinos request that you withdraw using the same payment method you deposited with. Suppose the initial deposit to a 300 welcome bonus casino came from Skrill.

In that case, that's also where your winnings need to be heading. The site might not allow you to use a different payment method, like Bitcoin or PayPal casinos.

Justified reasons to switch banking options exist, and you should talk to customer support about it if needed. None of our list's 300% casino bonus platforms will restrict you from using alternative withdrawal options, though.

Pros and Cons of 300 Match Bonus Casino Promotions

We spent a long time going back and forth between the best 300 welcome bonus casino brands. Due to our experience, we noticed and noted many benefits and minor disadvantages relating to these bonuses. We will discuss that in more detail in the sections that follow.

Pros and Cons of 300 Match Bonus Casino Promotions

Pros of a 300% Casino Bonus

  • Players can bet using three times more money than what they came with.
  • You can place higher wagers thanks to your new and increased bankroll.
  • A 300 casino bonus results in longer playing time compared to lower-matched deposits.
  • New players and existing ones can claim this welcome bonus.
  • They are best for low-stake players who play with minimum amounts.
  • You can play a wider selection of games because you have more cash.
  • Playing with house money enables you to try new strategies and betting styles.
  • Because of the bigger casino balance, you don't need to fear running out of money.
  • Wagering, depositing, and winning more can give you access to VIP perks.
  • A casino bonus 300 coupled with low wagering requirements promises great fun and massive winning potential.
  • Matched bonuses usually go hand in hand with free spins, cashback, and similar deals.

Cons of a 300 Casino Deposit Bonus

  • 300% casino bonus promos have (sometimes high) wagering requirements you must meet.
  • Online casinos can place an upper withdrawal limit on how much you can withdraw. I.e., regardless of what you win, you can only withdraw up to £100.
  • You must meet the rollover conditions before the bonus expires.
  • A Casino 300 bonus might not be eligible for your favourite casino games.
  • Table games or live casino games contribute only 10% to 30% to the wagering requirements.
  • You must read and understand the bonus terms to know the ins and outs of your bonus.
  • Playing with the casino's money, you can lose track of how much you are betting and wager more than you can afford to lose.


What is the best 300% casino bonus in the United Kingdom?

VIPSlotClub offers gamblers a match bonus of up to £4200 and 300 free spins.

Can I get a bigger match deposit than 300%?

Yes. Some casinos, like Mr Bet Casino, offer a 400% matched deposit bonus.

Do I need a bonus code to claim a 300% casino deposit bonus?

Some online sites require that the player enters a promo code to activate a bonus. More information about that is available on the website and the bonus Terms & Conditions.

What is the best alternative to a 300% deposit bonus casino?

To drastically improve your chances of winning, you can get a 200% casino bonus on deposits.

Who can claim 300% matched bonus offers?

The promotion is available to new players and existing ones, regardless if you are a small-time gambler or a high roller.

Are 300% casino bonuses only eligible for the first deposit?

Not necessarily. Some gambling sites offer the same bonus for the 1st, 2nd, and 3rd deposit.

Can I withdraw the bonus after the casino gives it to me?

You can withdraw as soon as you have met the bonus terms and wagering requirements.

Which games can I use my 300% casino welcome bonus on?

Casino sites usually have a list of qualified games that you must inspect. Generally, you need to play slot games or a selection of table games.


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