300% Casino Bonus and Up!

Welcome to the ultimate destination for high rollers and bonus hunters! If you’re looking for the biggest and boldest casino bonuses on the market, you’ve come to the right place. We specialise in bringing you the best 300% and up bonuses from the most trusted online casinos.

But we’re not just about the numbers, and we know that a great bonus is about more than just the percentage. That’s why we hand-pick only the best offers with fair terms and high-quality casinos.

What is a 300% casino bonus, and how is it calculated?

A 300% casino bonus is a promotion online casinos offer to attract new players or reward loyal ones. It means that for every pound you deposit, the casino will add 3 pounds to your bonus balance, up to a specific limit. For example, if you deposit 50 pounds, you will receive an additional 150 pounds in bonus funds for 200 pounds to play with.

To calculate the bonus amount, you can use the following formula:

Bonus amount = Deposit amount x Bonus percentage

So, in the example above, the bonus amount would be calculated as follows:

Bonus amount = 50 pounds x 300% = 150 pounds

Keep in mind that most casino bonuses come with specific terms and conditions that you must meet to be able to withdraw any winnings. These may include a minimum deposit amount, a wagering requirement, and a maximum cashout limit.

The Top Casinos with 300% Deposit Bonuses

Betfred Sports

Betfred Sports

Welcome Bonus

Deposit £10 and get £30 Bonus + 50 Bonus Spins

  • Payment PayPal, paysafecard + 9 more
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Welcome offer Stake £10 Get £40 in Bonuses, given as £30 in Free Bets and 50 Free Spins. New 18+ UK customers only. Register using the promo code WELCOME40, deposit and place first bet of £10+ on Sports (cumulative Evens+) within 7 days of registration. First bet must be on Sports. £30 in Free Bets and £10 in Free Spins (50x20p) credited within 10 hours of bet settlement. The 50 Free Spins can only be used on the following titles at Betfred Games: Eye of Horus, Eye of Horus Megaways, Fishin’ Frenzy, Fishin’ Frenzy Megaways. Free Bet stakes are not included in any returns. Bonuses have a 7-day expiry. Payment restrictions apply. SMS verification and/or Proof of I.D and address may be required. Full T&Cs apply.

BetVictor Casino

BetVictor Casino

Welcome Bonus

Deposit £10 and get £30 Bonus + 100 Bonus Spins

  • Games Providers Microgaming, NetEnt + 19 more
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Welcome offer wager £10 and get £30 in bonuses and 100 Free Spins for Fishin ‘Frenzy. 18+ New customers only. Opt in and wager £10 on selected games within 7 days of registration. Get 3 x £10 bonuses for selected games with up to 40x wagering plus 100 Free Spins on Fishin’ Frenzy. Bonuses expire in 30 days. Maximum redeemable from bonuses is £750. Card payments only. T&C’s Apply. begambleaware.org. Please gamble responsibly

Cash Spins

Cash Spins

Welcome Bonus

300% Bonus Up To £1,000 + 75 Bonus Spins

  • Games Providers Microgaming + 39 more
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Welcome offer 300% bonus up to £1000 and 75 zero wager spins on 7 Fortune Frenzy. New players only. This is part of a welcome package worth up to £1750 and 150 spins over 1st 3 deposits. Minimum deposit £20. Cash spins have no wagering requirement. The Welcome Package is subject to 33x wagering requirement at each stage of the 3 bonuses. Full terms apply.

Eclipse Casino

Eclipse Casino

Welcome Bonus

300% Bonus Up To £3,000

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    Welcome offer 300% Slots Match up to £3000 and 100% Cashback on first 3 deposits. Use code ECLIPSE300. Valid on the first three deposits. Minimum deposit £25+ on slots and specialty games only. PT X 40, no maximum cashout. Cashback is given in the form of a Free Chip, PT x50, maximum cash out x5, to be claimed in Live Chat. Terms apply.

    Golden Lion Casino

    Golden Lion Casino

    Welcome Bonus

    300% Bonus Up To £3,000

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      300% Welcome Bonus up to £3000 and 10% Cashback on 1st deposit using code ROAR300. Code is valid once for new players only, on deposit £25. PT x40, no maximum cash-out, valid on slots and specialty games only. Cashback is given in a form of a Free Chip, PT x50, maximum cash out x5, to be claimed in Live Chat. Terms apply

      Harry’s

      Harry’s

      Welcome Bonus

      300% Bonus Up To £2,500

      • Payment Klarna + 13 more
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      Welcome package offering 650% up to £5000 over 3 deposits, starting with 300% Bonus up to £2500 on 1st deposit. New players only. Opt in required. Minimum deposit £25. Welcome Casino Package Bonuses are subject to WR 50x within 10 days of bonus activation. Welcome Casino Package is only for Slots for the providers: Egt, Amatic, Netent. Full terms apply

      Lady Linda Casino

      Lady Linda Casino

      Welcome Bonus

      300% Bonus Up To £1,000

      • Payment Klarna + 13 more
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      Welcome offer 300% up to £1000. New players, 1st deposit only. Opt in required. Minimum deposit £25. Welcome Casino Bonus can be used on slots and only on the following Providers: Egt, Amatic, Netent. Welcome Casino Bonus is subject to WR 45x. Full terms apply.

      Luck of Spins

      Luck of Spins

      Welcome Bonus

      300% Bonus Up To £1,200

      • Payment Klarna + 7 more
      • Games Providers NetEnt, Microgaming + 54 more
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      Welcome offer 300% Bonus up to £1200. New registrations only, 1st deposit only. Minimum deposit £25. Maximum Bonus £1200. Welcome Casino Bonus can be used on slots and only on the following Provider: Egt, Netent, Novomatic, Play n go, Pragmatic, Amatic. Bonus amount is subject to a wagering requirement of 45x within 45 days. General Terms and Conditions apply.

      Nevada 777

      Nevada 777

      Welcome Bonus

      300% Bonus Up To £10,000 + 50 Bonus Spins

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        Welcome offer 300% Bonus up to £10000 and 50 Free Spins on 1st deposit. PLUS Claim 300% and 50 Free Spins again on the 2nd deposit. Coupon code WELCOME1 required. Minimum deposit £25. Free spins valid on Cash Bandits 3. WR 20x deposit + bonus amount. Winnings from Free Spins will be subject to wagering of 45x. Full terms apply.

        Platinum Club VIP

        Platinum Club VIP

        Welcome Bonus

        300% Bonus Up To £3,000

        • Games Providers NetEnt + 32 more
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        Welcome offer 300% Bonus up to £3000. New registrations, 1st deposit only. Minimum deposit £25. Opt in required. Welcome Bonus can be used on slots and only on the following Providers: Egt,, Amatic, Netent. Bonus is subject to wagering requirement of 40x. Full terms apply.

        Slots n Roll

        Slots n Roll

        Welcome Bonus

        300% Bonus Up To £5,000 + 50 Bonus Spins

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          Welcome offer 600% Bonus and 100 Free Spins over your 1st 2 deposits, starting with 300% Bonus and 50 Free Spins on Cash Bandits 3 on 1st deposit. Coupon code WELCOME1 required. Min deposit £20. Maximum Bonus £5000. Maximum winnings from Free Spins £50. WR Bonus 20x. WR Free Spins winnings 45x. Full terms apply.

          Ultima Casino

          Ultima Casino

          Welcome Bonus

          300% Bonus Up To £3,000 + 50 Bonus Spins

          • Games Providers NetEnt + 40 more
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          NEW Improved Welcome Bonus 300% up to £3000 and 50 Free Spins on Starburst. New players, 1st deposit only. Opt in required for bonus. To claim the Freespins players must contact the support team within 24 hours after receiving the Welcome Casino Bonus with the following code: WELCOME50FS. Minimum deposit £25. Maximum bonus £3000. Welcome Casino Bonus can be used on slots and only on the following Provider: Egt, Netent, Amatic. Free spins are awarded on the slot “Starburst” (value per spin £0.10). Both bonuses are subject to wagering requirement of 20x within 45 days. Minimum bet amount to count toward the wagering requirement is £0.50 and maximum is £5.00. General Terms and Conditions apply.

          How to Claim Your 300% Casino Bonus

          To take advantage of these incredible offers, follow these straightforward steps:

          1. Select your preferred casino: Browse our list of the best casinos offering a 300% deposit bonus and choose the one that appeals to you the most.
          2. Register an account: Complete the registration process by providing the required personal information and verifying your account.
          3. Make a deposit: Navigate to the casino’s cashier section and make your initial deposit. Be sure to check the minimum deposit required to claim the bonus.
          4. Claim your bonus: Once your deposit has been processed, your 300% bonus will be automatically credited to your account.

          Wagering Requirements Explained

          When it comes to casino bonuses, understanding wagering requirements is essential. These requirements dictate the number of times you must wager the bonus amount before you can withdraw any winnings. For instance, if you receive a £100 bonus with a 30x wagering requirement, you will need to wager a total of £3,000 before you can cash out any winnings.

          Tips for Meeting Wagering Requirements

          Here are some valuable tips to help you successfully meet the wagering requirements of your 300 casino bonus:

          1. Choose games with a high RTP: Opt for a high return to player (RTP) percentage to maximise your chances of winning.
          2. Set a budget: Establish and stick to it to avoid overspending during gaming sessions.
          3. Play low-volatility games: These offer smaller but more frequent payouts, which can help you meet the wagering requirements more efficiently.

          Essential Bonus Terms to Be Aware Of

          Before claiming any casino bonus, familiarising yourself with the bonus terms and conditions is crucial. Here are some essential aspects to consider:

          • Expiry date: Bonuses often come with an expiry date, so use your bonus funds before they expire.
          • Game restrictions: Some casinos may restrict playing with bonus funds on specific games or game categories.
          • Maximum bet limits: Casinos may limit the maximum bet amount when using bonus funds.
          • Withdrawal restrictions: Some casinos may cap the amount you can withdraw from your bonus winnings.

          The Benefits of 300% Casino Bonuses

          300% casino bonuses offer numerous advantages to both new and experienced players. Here are some of the most notable benefits:

          Enhanced Bankroll

          A 300% deposit bonus significantly boosts your initial deposit, giving you a larger bankroll to explore the casino’s offerings. This increased bankroll allows you to play longer, increasing your chances of landing substantial wins.

          Opportunity to Try New Games

          With a larger bankroll, you can venture into unfamiliar games and discover new favourites without risking too much of your own money. This is particularly beneficial if you want to explore the latest slot releases or try your hand at different table games.

          Improved Winning Potential

          The larger your bankroll, the more opportunities you have to win. With a 300% bonus casino, you can place more bets and potentially hit that life-changing jackpot.

          Increased Loyalty Points

          Many online casinos offer loyalty programmes that reward players with points for every bet. You can exchange these points for various rewards, such as bonus funds, free spins, or even cashback, as you accumulate these points. By using a 300% deposit bonus, you can quickly earn more loyalty points and enjoy the benefits of the casino’s rewards programme.

          In Conclusion: Make the Most of Your 300 Casino Bonus

          A 300% casino bonus is a highly attractive offer that significantly enhances your online gambling experience. You can take full advantage of this generous promotion by selecting a reputable casino, understanding the wagering requirements, and being mindful of the bonus terms. Armed with the knowledge from our comprehensive guide, you are now ready to dive into the thrilling world of online casinos and claim your 300% deposit bonus. So, make your first deposit and enjoy your gaming experience!