Dive into the Deep End with 300% Casino Bonuses

A 300% casino bonus is a unique bonus offer that is available only in top casinos for new gamblers. This bonus will allow you to plunge into the world of gambling for an average minimum deposit of $25 (though some offers may require other limits) and at the same time have a high chance of winning real money. What is the benefit of the 300% bonus? It's simple: the casino adds 300% to your deposit, and in the end, if you deposited $100, you will have $400 in your account.

You can also find that a significant amount of FSs may be added to such a match bonus, which is very cool. Please note that the 300% bonus must be wagered at least 30x on average, plus, the casino may set upper limits on winnings. Therefore, our SlotsUp team decided to prepare a review for you, in which we will talk about all the subtleties of the online casino bonus 300%, consider the pros and cons, and add the best casinos where you can get this awesome bonus.

SlotsUp Recommended Casino Bonuses

Affiliate Disclosure


The bonus package consists of 2 separate deposit bonuses
  • Deposit #1: 200% up to 200 USD
  • Deposit #2: 200% up to 200 USD
Minimum deposit to activate the bonus: 20 USD.

Deposits below this amount don't qualify for receiving this bonus.

This bonus has restrictions on game types
  • This bonus is available only for game types: Classic Slot + 5 game types

You must be 18 or older to visit HunnyPlay. Terms and conditions apply for bonuses. Gambling is for entertainment purposes, and players should always gamble responsibly. If you need assistance, please refer to our responsible game guide.

300% up to 4000 EUR and 200 Free Spins

N1 Casino logo

Warnings (3)

  • Free spins must be activated within 3 days after receiving.
  • After third deposit the player will get 50 free spins in Big Bass Vegas Double Down Deluxe (Pragmatic). Alternative slot: Wild Cash (BGaming).
  • First deposit free spins will be credited in Madame Destiny Megaways (Pragmatic). Alternative slot: Snoop Dogg Dollars (BGaming).
The bonus package consists of 4 separate deposit bonuses
  • Deposit #1: 100% up to 100 EUR and 150 Free Spins
  • Deposit #2: 75% up to 100 EUR and 0 Free Spins
  • Deposit #3: 100% up to 1000 EUR and 50 Free Spins
  • Deposit #4: 25% up to 1000 EUR and 0 Free Spins
Minimum deposit to activate the bonus: 20 EUR.

Deposits below this amount don't qualify for receiving this bonus.

Wagering requirements: x40 for bonus and x40 for free spins. Game contributions apply.

You must wager a total of 40 times the bonus amount to meet the requirement and withdraw your winnings.
For example, if you receive a 4000 EUR bonus, you’ll need to place bets totaling 160000 EUR (4000 * 40) throughout your gameplay before you can withdraw your winnings.

But Free Spins have a different wagering requirement:
You must wager a total of 40 times the winnings from your free spins to meet the requirement and withdraw your winnings.
For example, if you win 4000 EUR from free spins, you’ll need to place bets totaling 160000 EUR (4000 * 40) throughout your gameplay before you can withdraw your winnings.

Contribution Requirements

Different game types may contribute differently according bonus terms and conditions:

    Maximum bet: 5 EUR

    Bets exceeding 5 EUR are not allowed when playing with bonus funds.
    Exceeding this amount in a single bet may result in the forfeiture of winnings or the bonus being voided.

    150 Free Spins: 0 EUR per spin (total value 0 EUR). Restrictions apply.
    Restrictions on free spins:
    • Free spins are valid and available for 14 days after bonus activation.
    • Free Spins are limited to 150 spins over a 7-day period.
    The bonus is valid for 30 days after activation.

    This means that if you don't use the bonus and meet the wagering requirements within 30-days period after the bonus is activated and added to your account, the bonus will be deactivated and forfeited.

    This bonus is sticky and not cashable

    Sticky casino bonuses combine your deposit and bonus funds into a single balance.
    This means you cannot withdraw any winnings until you meet the wagering requirements. \nYou can use the bonus to play and potentially increase your balance, but when you withdraw your funds, the bonus amount will be deducted from your total balance.

    Maximum winnings from the wagered bonus: 200 EUR.
    This means that the maximum you can win from bonus free spins is 200 EUR.
    For example, if you win 280 EUR from free spins, you will only be able to withdraw 200 EUR (after meeting the wagering requirements), and the remaining 80 EUR will be forfeited due to this requirement.
    This bonus has restrictions on game types
    • This bonus is available only for game types: American Roulette + 7 game types

    You must be 18 or older to visit N1 Casino. Terms and conditions apply for bonuses. Gambling is for entertainment purposes, and players should always gamble responsibly. If you need assistance, please refer to our responsible game guide.

    300% up to 3000 USD and 100 Free Spins

    Slotozen logo

    Warnings (1)

    • 100 Free Spins are valid for Gates of Olympus 1000, Wolf Gold, Sweet Bonanza 1000, Big Bass Bonanza, Sugar Rush (Pragmatic Play).
    The bonus package consists of 2 separate deposit bonuses
    • Deposit #1: 100% up to 1000 USD and 100 Free Spins
    • Deposit #2: 200% up to 1000 USD and 50 Free Spins
    Minimum deposit to activate the bonus: 50 USD.

    Deposits below this amount don't qualify for receiving this bonus.

    100 Free Spins: 0 USD per spin (total value 0 USD). Restrictions apply.
    Restrictions on free spins:
    • Free Spins are limited to 100 spins over a 5-day period.
    Maximum bet: 5 USD

    Bets exceeding 5 USD are not allowed when playing with bonus funds.
    Exceeding this amount in a single bet may result in the forfeiture of winnings or the bonus being voided.

    Maximum winnings from the wagered bonus: 100 times the deposit amount.
    This means that the maximum amount you can win using the bonus 100 times your deposit amount.
    For example, if you deposit 50 USD, the maximum you can win and withdraw is 5000 USD (after meeting the wagering requirements).
    Any winnings above this amount will be forfeited due to this requirement.
    The bonus is valid for 14 days after activation.

    This means that if you don't use the bonus and meet the wagering requirements within 14-days period after the bonus is activated and added to your account, the bonus will be deactivated and forfeited.

    This bonus is sticky and not cashable

    Sticky casino bonuses combine your deposit and bonus funds into a single balance.
    This means you cannot withdraw any winnings until you meet the wagering requirements. \nYou can use the bonus to play and potentially increase your balance, but when you withdraw your funds, the bonus amount will be deducted from your total balance.

    Wagering requirements: x40 for bonus and x40 for free spins. Game contributions apply.

    You must wager a total of 40 times the bonus amount to meet the requirement and withdraw your winnings.
    For example, if you receive a 3000 USD bonus, you’ll need to place bets totaling 120000 USD (3000 * 40) throughout your gameplay before you can withdraw your winnings.

    But Free Spins have a different wagering requirement:
    You must wager a total of 40 times the winnings from your free spins to meet the requirement and withdraw your winnings.
    For example, if you win 3000 USD from free spins, you’ll need to place bets totaling 120000 USD (3000 * 40) throughout your gameplay before you can withdraw your winnings.

    Contribution Requirements

    Different game types may contribute differently according bonus terms and conditions:

    • Slot 100%
    • Blackjack 5%
    • Roulette 5%
    • Video Poker 5%
    • Dice & Craps 5%
    This bonus has restrictions on game types
    • This bonus is available only for game types: Slot + 10 game types

    You must be 18 or older to visit Slotozen. Terms and conditions apply for bonuses. Gambling is for entertainment purposes, and players should always gamble responsibly. If you need assistance, please refer to our responsible game guide.

    300% up to 1000 EUR and 100 Free Spins

    CasinoREX logo

    Warnings (2)

    • All bonuses for players from Finland have wager x100.
    • All spins are available in All Lucky Clovers 5.
    The bonus package consists of 5 separate deposit bonuses
    • Deposit #1: 100% up to 200 EUR and 20 Free Spins
    • Deposit #2: 50% up to 200 EUR and 20 Free Spins
    • Deposit #3: 50% up to 200 EUR and 20 Free Spins
    • Deposit #4: 50% up to 200 EUR and 20 Free Spins
    • Deposit #5: 50% up to 200 EUR and 20 Free Spins
    Minimum deposit to activate the bonus: 20 EUR.

    Deposits below this amount don't qualify for receiving this bonus.

    Maximum winnings from the wagered bonus: 40 EUR.
    This means that the maximum you can win from bonus free spins is 40 EUR.
    For example, if you win 60 EUR from free spins, you will only be able to withdraw 40 EUR (after meeting the wagering requirements), and the remaining 20 EUR will be forfeited due to this requirement.
    Wagering requirements: x50 for bonus. Game contributions apply.

    You must wager a total of 50 times the bonus amount to meet the requirement and withdraw your winnings.
    For example, if you receive a 1000 EUR bonus, you’ll need to place bets totaling 50000 EUR (1000 * 50) throughout your gameplay before you can withdraw your winnings.

    Contribution Requirements

    Different game types may contribute differently according bonus terms and conditions:

    • Slot 100%
    • Video Poker 5%
    • Roulette 5%
    • Blackjack 5%
    • Baccarat 5%
    Maximum bet: 5 EUR

    Bets exceeding 5 EUR are not allowed when playing with bonus funds.
    Exceeding this amount in a single bet may result in the forfeiture of winnings or the bonus being voided.

    100 Free Spins: 0 EUR per spin (total value 0 EUR). Restrictions apply.
    Restrictions on free spins:
    • Free spins are valid and available for 15 days after bonus activation.
    • Free Spins are limited to 100 spins over a 1-day period.
    The bonus is valid for 15 days after activation.

    This means that if you don't use the bonus and meet the wagering requirements within 15-days period after the bonus is activated and added to your account, the bonus will be deactivated and forfeited.

    This bonus is sticky and not cashable

    Sticky casino bonuses combine your deposit and bonus funds into a single balance.
    This means you cannot withdraw any winnings until you meet the wagering requirements. \nYou can use the bonus to play and potentially increase your balance, but when you withdraw your funds, the bonus amount will be deducted from your total balance.

    This bonus has restrictions on game types
    • This bonus is available only for game types: Slot + 10 game types

    You must be 18 or older to visit CasinoREX. Terms and conditions apply for bonuses. Gambling is for entertainment purposes, and players should always gamble responsibly. If you need assistance, please refer to our responsible game guide.


    Wagering requirements: x40 for bonus, x40 for bonus + deposit, x40 for free spins, x40 for free money and x40 for cashback money. Game contributions apply.

    You must wager a total of 40 times the bonus amount to meet the requirement and withdraw your winnings.
    For example, if you receive a 0 USD bonus, you’ll need to place bets totaling 0 USD (0 * 40) throughout your gameplay before you can withdraw your winnings.

    But Bonus + Deposit have a different wagering requirement:
    You must wager a total of 40 times the combined amount of the bonus and deposit to meet the requirement and withdraw your winnings.
    For example, if you deposit 0 USD and receive a 0 USD bonus, you’ll need to place bets totaling 0 USD ((0 + 0) * 40) throughout your gameplay before you can withdraw your winnings.

    But Free Spins have a different wagering requirement:
    You must wager a total of 40 times the winnings from your free spins to meet the requirement and withdraw your winnings.
    For example, if you win 0 USD from free spins, you’ll need to place bets totaling 0 USD (0 * 40) throughout your gameplay before you can withdraw your winnings.

    But Free Money have a different wagering requirement:
    You must wager a total of 40 times the free money bonus amount to meet the requirement and withdraw your winnings.
    For example, if you receive a 0 USD free money bonus, you’ll need to place bets totaling 0 USD (0 * 40) throughout your gameplay before you can withdraw your winnings.

    But Cashback have a different wagering requirement:
    Cashback will be added to your account as bonus money.
    This means you must wager a total of 40 times the cashback amount to meet the requirement and withdraw your winnings.
    For example, if you receive 0 USD in cashback, you’ll need to place bets totaling 0 USD (0 * 40) throughout your gameplay before you can withdraw your winnings.

    Contribution Requirements

    Different game types may contribute differently according bonus terms and conditions:

      This bonus is sticky and not cashable

      Sticky casino bonuses combine your deposit and bonus funds into a single balance.
      This means you cannot withdraw any winnings until you meet the wagering requirements. \nYou can use the bonus to play and potentially increase your balance, but when you withdraw your funds, the bonus amount will be deducted from your total balance.

      Maximum winnings from wagered bonus: Unlimited ∞

      This means that the amount you can win using the bonus is unlimited.
      For example, if you win 0 USD or even 0 USD, you can withdraw the entire amount once you meet the wagering requirements.

      Minimum deposit to activate the bonus: 25 USD.

      Deposits below this amount don't qualify for receiving this bonus.

      No game restrictions for this bonus.

      -


      You must be 18 or older to visit Supernova. Terms and conditions apply for bonuses. Gambling is for entertainment purposes, and players should always gamble responsibly. If you need assistance, please refer to our responsible game guide.

      1-5 of 5

      The Scouting Mission: How We Found the Top Picks

      Here, we’ll share how we select and research sites that offer an online casino 300% bonus. Of course, it is pretty difficult to find a casino that offers 300% on the first deposit since many sites offer such a bonus for 3 deposits rather than only one. Also, if we find such a bonus, we carefully check the terms and conditions as we only want to deal with reliable casinos. That’s what we analyse:

      • High Deposit Limits: We select casinos where you can make higher deposits in order to get the maximum from the bonus.

      • Fast Payout Options: Of course, the priority casino is the one that offers instant withdrawals and optimal withdrawal limits.

      • VIP Programs: We also try to choose a casino that has a VIP club as there, you can receive additional bonuses and privileges.

      • Extensive Game Selection: It is also important that the 300% welcome bonus casino has a wide range of slots to spend the offer.

      Understanding the Power Play: How Does a 300% Casino Bonus Work?

      A 300% bonus casino offer is a unique and generous gift to new or existing players, which increases the bonus by 3x times and gives a chance to win real money. In order to make the most of the bonus potential, gamblers can make the maximum deposit within the promotion. Of course, the 300% bonus is perfect for high rollers, but beginners should also pay attention to this promotion type. Let's take a look at the mechanics of this bonus:

      • Deposit Amount: The larger the first deposit, the larger the bonus will be. If you want to make the most of the bonus, choose an offer that allows you to make a high first deposit.

      • Bonus Money: the 300% bonus will add three times its amount to the gambler’s deposit. Therefore, with a deposit of, for example, $1,000, the player will receive $3,000 in bonus money, resulting in a total of $4,000.

      • Supersized Bankroll: The player’s overall starting balance increases significantly thanks to the bonus, and this will help the gambler extend his gaming session and try more different slots.

      Claiming Your Throne: How to Secure a 300% Casino Bonus

      In order to receive an online casino 300 deposit bonus, you need to choose a platform that offers such a promotion and make a deposit there accordingly. Of course, it sounds very simple, but to activate the bonus you need to fulfill a number of conditions that not all gamblers know about. Therefore, our SlotsUp team will guide you along this way with these steps and tips:

      • Choosing Your Arena: Choose the optimal 300 bonus online casino site. You can find such casinos on our website.

      • Conquer the Signup Process: After you select a casino, you need to register, which takes place in a couple of clicks.

      • Fuel Your Play: Next, go to your personal account or banking section to make a deposit. If you have a promotional code, don't forget to include it.

      • Activate Your Bonus: After making a deposit, you can activate the 300% bonus. You can also activate the bonus during the registration process.

      • Time to Rule: done, now you can enjoy the 300% bonus. But keep in mind that even when using a bonus, you must adhere to responsible gambling.

      Weighing the Scales: Pros and Cons of 300% Casino Bonuses

      Of course, a 300% bonus is a great gift for new gamblers, with the help of which users will be able to test the casino, play new slots, and still have every chance of winning real money. But it’s worth noting that even such a great bonus can have drawbacks. Let's look at both the pros and cons:

      • Massive Bankroll Boost: thanks to 300%, you can increase your bankroll by 3x for a minimum deposit.

      • Unlock High-Limit Games: The 300% bonus opens the door to the world of high rollers and therefore players can play slots with higher stakes.

      • Potential for Huge Wins: Since the 300% bonus will increase your bankroll by 3x and give you access to high stakes, you can get generous winnings.

      • Stringent Wagering Requirements: Typically, a 300% bonus requires a higher wager, such as 35x or even higher.

      • Higher Deposit Required: To activate the 300% bonus, many casinos may require a higher than average deposit, for example $30 or $50.

      • Stricter Bonus T&C: Also, more generous bonuses are strict in terms of rules, for example, to activate it, you need to make a deposit using crypto and do it only within 7 days.

      Navigating the Labyrinth: Important T&C for 300% Casino Bonuses

      Before activating the 300% bonus, we advise you to carefully study the terms and conditions of the bonus package in order to play slots in comfort in the future. On this list, we will add the most important points that you need to pay attention to:

      • Wagering Requirements: The 300% bonus offer requires wagering (eg., 50x). Without this condition, players will not be able to withdraw their winnings. Yes, you may not wager the bonus, but in this case, you will not be able to receive winnings from bonus funds.

      • Game Contribution: Please note that some casinos may set restrictions on games that participate in the 300% bonus, and we advise you to familiarize yourself with the list of slots. Also, within the framework of the promotion, there may be limits on bets, Bonus Buy, and maximum winnings.

      • Bonus Validity Period: Basically, the 300% bonus has limits for activation, use, and wagering. As a rule, this is from 30 to 60 days. But there are also exceptions where there are no time limits.

      Conclusion: Conquer the Casino with a 300% Bonus (But Gamble Responsibly!

      The 300% bonus is a great bonus for high rollers and gambling enthusiasts as thanks to this bonus, players can increase their deposit by 3 times. Also, for such a bonus, there are higher limits on bets, deposits, and maximum winnings, which is very pleasing. Of course, such a massive bonus requires more complicated rules, such as a wager of over 40x, a deposit of $30 or even $100, and topping up with a specific payment method, but this is achievable, and the bonus is really generous. This bonus is also rare to find. Therefore, you can follow our updates so as not to miss this 300% match bonus opportunity.

      Page Information

      Adeleke Olufifun img

      Page Updated September 17, 2025 by Adeleke Olufifun

      Game Analyst & Reviewer
      Author's expertise
      2 years
      of experience
      2 years
      on SlotsUp
      409 posts
      published
      5 months ago
      last publication