300% deposit bonuses are offered at various online casinos in Ireland. In this guide, you’ll discover how to find these bonuses, assess their value, and make the most of them. We’ve also compiled a list of the best 300% welcome bonuses available at Irish online casinos.
300% Casino Bonus in Ireland 2025
18+ | T&Cs apply.
- + Take Olympus (Betsoft)
- + 100% up to €700
- + 50 Spins on Fruit Zen
18+ | T&Cs apply.
- + Take Olympus (Betsoft)
- + 100% up to €500
- + 50 Bonus Spins
18+ | T&Cs apply.
- + Take Olympus (Betsoft)
- + 100% up to $500
- + 50 Spins on Fruit Zen
18+ | T&Cs apply.
- + 100 Bonus Spins
- + The Wish Master (NetEnt)
- + Bonus Code: GENIE1
18+ | T&Cs apply.
- + Lucky Dwarfs (Ela Games)
- + 100% up to €1,000
- + 100 Bonus Spins
18+ | T&Cs apply.
- + Take Olympus (Betsoft)
- + 200% up to €1000
- + 100 Bonus Spins on Sugar Pop
18+ | T&Cs apply.
- + Sweet Bonanza (Pragmatic Play)
- + Bonus code: SWEETRED100
- + €150 & 150 Bonus Spins
18+ | T&Cs apply.
- + Total Overdrive (Betsoft)
- + Bonus code: ZAM20
- + Wager-free
18+ | T&Cs apply.
- + Primal Hunt (Betsoft)
- + Bonus Code: MDN20
- + 150% up to €300
18+ | T&Cs apply.
- + Deep Sea (BGaming)
- + Bonus Code: DEEPBIT
- + 100% up to €400
18+ | T&Cs apply.
- + Tower of Fortuna (Betsoft)
- + Bonus code: ZAM20
- + Wager-free
18+ | T&Cs apply.
- + Primal Hunt (Betsoft)
- + Bonus Code: MDN20
- + 150% up to €300
18+ | T&Cs apply.
- + Wager Free!
- + Bonus Code: DML150
- + Automatic accrediting
18+ | T&Cs apply.
- + Izzi Art (BGaming)
- + Code: EXCLUSIVE
- + 50% up to €300
18+ | T&Cs apply.
- + Big Bass Splash
- + 100% up to €500
- + 150 Bonus Spins
18+ | T&Cs apply.
- + Wild Chicago
- + 100% up to €1000
- + 100 Spins on Elvis Frog in Vegas
18+ | T&Cs apply.
- + Book of Sirens
- + Wagering x3
- + 120% up to €300
18+ | T&Cs apply.
- + Book of Cats (Bgaming)
- + 100% up to €500
- + 200 Bonus Spins
18+ | T&Cs apply.
- + Book of Fallen
- + 120% up to €300
- + 120 Extra Spins
18+ | T&Cs apply.
- + €5 No Deposit Bonus
- + Exclusive Casino Bonuses
- + Brand-New Online Casinos
18+ | T&Cs apply.
- + Book of Dead
- + 120% up to €300
- + 70 Bonus Spins
18+ | T&Cs apply.
- + Book of Dead
- + 100% up to €200
- + On first deposit
18+ | T&Cs apply.
- + Code: BLITZ3
- + 100% up to €150
- + 150 Bonus Spins
18+ | T&Cs apply.
- + Book of Fallen
- + Code: tbx0
- + 100% up to €500
18+ | T&Cs apply.
- + Aviator (Spribe)
- + 100% up to €100
- + 100 Bonus Spins
18+ | T&Cs apply.
- + Bonus Code: Top15FS
- + 100% up to €1000
- + 100 Bonus Spins
18+ | T&Cs apply.
- + Book of Dead
- + 100% up to €100
- + 100 Bonus Spins
18+ | T&Cs apply.
- + 10% Daily Cashback
- + Live Casino
- + €20 Minimum Deposit
18+ | T&Cs apply.
- + Dragon’s Lucky 25
- + 100% up to €200
- + 70 Extra Spins
18+ | T&Cs apply.
- + Dragon’s nest (Mascot)
- + 100% up to €300
- + 100 Bonus Spins
18+ | T&Cs apply.
- + Fire In The Hole xBomb
- + Code: EXCL15
- + Choose your Welcome Bonus
18+ | T&Cs apply.
- + On 3 BGaming Slots
- + 100% up to €100
- + 180 Bonus Spins
18+ | T&Cs apply.
- + Odin's Tree (Gamebeat)
- + 100% up to €500
- + 100 Bonus Spins
18+ | T&Cs apply.
- + Pandastic Adventure
- + Code: PANDA30
- + 100% up to €400
18+ | T&Cs apply.
- + Book of Dead
- + 100% up to €200
- + €12 Minimum Deposit
18+ | T&Cs apply.
- + 3X3: Hold The Spin (Gamzix)
- + Code: DREAMBONUSMAX
- + €1000 Bonus + 100 Spins
18+ | T&Cs apply.
- + Wilds of Fortune
- + Code: FORTUNE50
- + Up to 100% bonus & 300 Spins
18+ | T&Cs apply.
- + 100% up to €1000
- + 1st deposit Code: GRATO100
- + Min. Deposit €10
18+ | T&Cs apply.
- + 100% up to €200
- + 10 extra raffle tickets
- + Code: GOLDNUGGET
18+ | T&Cs apply.
- + Aloha King Elvis
- + 100% up to €500
- + 100 Bonus Spins
18+ | T&Cs apply.
- + Sugar Rush
- + Code: ZAMSINO
- + 125% up to €300
18+ | T&Cs apply.
- + Piggy Bank Bills (Pragmatic)
- + 100% up to €300
- + 100 Spins on Bonanza Billion
18+ | T&Cs apply.
- + Skulls UP (Quickspin)
- + 150% up to €150
- + 50 Spins on Sakura Fortune
18+ | T&Cs apply.
- + Royal Joker Hold and Win
- + Code: 50BLITZ1
- + 100% up to €2.500
18+ | T&Cs apply.
- + Sweet Bonanza
- + 100% up to €750
- + 100 Bonus Spins
18+ | T&Cs apply.
- + €500 Non-Sticky Bonus
- + 100 Bonus Spins
- + Vegas Star / Blazing Cash 2
18+ | T&Cs apply.
- + 3X3: 27 Ways(Gamzix)
- + Code: EASYWINDREAM
- + 100% Bonus + 100 Spins
18+ | T&Cs apply.
- + Zeus The Thunderer
- + Code: SLOTS20
- + €500 Bonus & 100 Spins
18+ | T&Cs apply.
- + Northern Sky (Quickspin)
- + 100% up to €200
- + 50 Spins on Book of Dead
18+ | T&Cs apply.
- + Luck & Magic (Bgaming)
- + Code: LUCK10
- + €500 Bonus & 100 Spins
18+ | T&Cs apply.
- + Starburst
- + Code: FREESPINS50
- + 100% up to €150
18+ | T&Cs apply.
- + Bastet and Cats
- + Code: ZAMSINO
- + 125% up to €300
18+ | T&Cs apply.
- + Big Bass Keeping it Reel
- + 100% up to €111
- + 33 Extra Spins
18+ | T&Cs apply.
- + Big Bass Bonanza
- + Code: BONANZA
- + 200% Casino Bonus
18+ | T&Cs apply.
- + Play'n Go games
- + 100% up to €300
- + 50 Bonus Spins
How to choose the best 300% deposit bonuses
Claiming a deposit bonus requires you to invest your own money, so there’s always some level of risk. That’s why it’s crucial to fully understand the terms and conditions before accepting one.
In this section, we’ll cover the different types of 300% bonuses, any extra offers that might come with them, and key factors to look out for. Terms and conditions are very important with a bonus, especially when you have to make a deposit.
It’s always a good idea to check the terms and conditions yourself before claiming a bonus, but you can also rely on our recommended casinos, where we’ve already reviewed the offers. On this page, you will find the best 300% welcome bonuses on the Irish market.
You will have access to top-quality casinos with attractive welcome bonuses and no impossible terms and conditions.
💡 Tip: For 300% deposit bonuses, always check if the bonus locks your deposit until wagering is complete, this is common with higher-percentage offers. Pro players prefer non-sticky 300% bonuses, where you can forfeit the bonus mid-play and withdraw real-money winnings if you score big early. This exit strategy protects your deposit and turns volatile wins into instant cashouts without grinding full rollover.
Types of 300% bonuses
A 300% bonus means the casino gives you three times your deposit as extra funds. This article does not cover no deposit bonuses.
In addition to the extra funds, these promotions can also include perks like free spins or raffle tickets with big prizes.
Simply put, a 300% bonus will add an extra 300 Euro to your balance when you deposit 100 Euro. Depending on the amount you deposited and the limits of the promotion, that amount offered may vary.
Bonus terms and conditions
A 300% bonus is generally offered to players who register at a new online casino where they have never had an account before. Since this is a large bonus, it’s mostly offered as a welcome bonus and is rarely available for existing customers as a reload bonus.
While a 300% bonus may seem very generous, it’s essential to review the terms and conditions associated with it carefully. Each promotional offer includes detailed terms and conditions outlining both the casino’s and the player’s obligations and any limitations of the promotion.
If you want to be sure that you’ll be able to get to the point where you can withdraw the money you’ve earned with that bonus, I recommend you read on about some of the important things to look out for in the terms and conditions of the offers.
Betting requirements
Every welcome bonus comes with wagering requirements. These are important if you want to withdraw your winnings. With a 300% bonus, you’ll need to wager four times your initial deposit. This bonus is strictly for use in the casino and typically cannot be withdrawn until after you have used it all and might have won.
The money won with that bonus cannot be withdrawn immediately, though. First, you have to wager an amount which is generally somewhere between 30-50 times the bonus amount (or the amount deposited plus the bonus). So, in the case of a bonus of 300 euros, you may be asked to bet 9000 euros (if 30x the bonus is required).
Bet values are usually capped within the promotion’s limits, so, for instance, you can’t place nine bets of 1,000 euros to meet the requirements quickly. So, in this example, you will have to place hundreds or thousands of bets until you cover the requirements.
Gambling restrictions
Casinos impose restrictions on how bonus funds can be used to minimize potential losses. A 300% bonus, for example, is usually valid on slots or arcade-style games, but some casinos, such as ArcaneBet Casino and Nuggetslots Casino, may exclude certain high-RTP slots or jackpot titles from bonus play.
In some cases, casinos allow bonus funds to be used on live dealer or table games, but with reduced wagering contribution. At Lucky Hunter Casino, for instance, a €100 bet on slots counts fully toward wagering requirements, whereas the same amount on roulette might only contribute €10 or €20. This means clearing the requirements takes significantly longer when playing games like blackjack, baccarat, or live casino variants.
Always check the casino’s terms before claiming a bonus to understand which games are eligible and how different game types contribute toward meeting wagering conditions.
Time limits
It is also a good idea to consider the time allowed to use the bonus. You have a period that can vary from days to weeks, both to use the bonus and to fulfil the wagering requirements.
You risk forfeiting the bonus if you don’t meet the requirements within the allotted time.
💡 Tip: For bonuses with tight time limits, avoid slots with slow feature pacing, like long bonus rounds, story-driven animations, or sticky wilds that drag out spins. Pro players filter for turbo-mode slots with rapid spin cycles (e.g. Quickspin or Pragmatic Play titles), allowing them to crank out 600+ spins per hour and meet wagering before the clock runs out.
Finding 300% Deposit Bonuses at Irish Online Casinos
There are two ways to find 300% deposit bonuses: the difficult way or the easy way. The harder approach involves manually checking dozens of casinos, reading their terms, and comparing offers. This can be time-consuming, especially since some promotions come with high wagering requirements or game restrictions.
The easier option is to refer to our list of recommended casinos that offer 300% bonuses. Sites like Mr Fortune Casino and Verde Casino provide generous deposit matches while maintaining fair terms for Irish players. These casinos are fully licensed and secure, ensuring a reliable gaming experience.
Even with a recommended casino, always review the bonus terms before accepting an offer to understand the wagering requirements and eligible games.
How to optimize the benefits of a bonus
A welcome bonus looks great and is specifically designed to attract new players. However, it also has limits, and to get the maximum possible, you’ll need to know what they are.
So reading the terms and conditions is very important in the case of a promotional bonus.
I recommend also being familiar with the slots used to cover your wagering requirements. Game developers generally have free variants of slots, which are identical to the paid ones. For an extra chance, see which ones you like best and which ones have good RTP (rate of return of winnings to players).
Licenses and regulations
A casino license is non-negotiable. Always check that the casino is licensed for the Irish market. GRAI is the body that offers it, and on their website they have a list of casinos that have obtained it.
Licensed casinos follow strict regulations to protect players. If any issues arise, you’ll have a regulatory body to turn to, ensuring the casino complies with Irish law. Players have certain protection, but there are limitations that casinos have to take into account.
300% bonuses explained for beginners
A 300% bonus gives the player an additional amount with which to place bets, but only after they make a first deposit. The casino can allow the minimum amount, but it can also be higher.
As an example, if you deposit 50 Euro, the casino will give you an extra 150 Euro for a 300% bonus. The total amount you’ll have to play with is 200 Euro (50 deposited and 150 received).
In general, you won’t be able to withdraw the bonus amount, but you will be able to win other money with it. You fulfil the wagering requirements, and then you can also withdraw any remaining winnings.
💡 Tip: With 300% bonuses, the bonus-to-cash ratio is heavily weighted, meaning your play is more likely to be tracked for patterns that look like bonus hunting. Pro players avoid this by intentionally mixing bet sizes within terms, using non-linear wagering patterns (e.g. €1.20 → €0.60 → €0.90), which reduces the chance of triggering risk flags and getting winnings voided for irregular play.
Getting a 300% bonus, step by step
To get a 300% bonus, there are a few steps that are generally valid:
- Choose the right casino by searching manually or using our list of recommended casinos with 300% offers.
- Register. Create a new casino account by giving the casino the necessary personal details. Then confirm your e-mail and phone number.
- First deposit. You get that 300% bonus only after you make a deposit that meets the casino’s conditions (such as minimum deposit amount, accepted payment method, etc).
- Play. Play slots and other permitted games to cover your wagering requirements.
- Withdraw your winnings. If you have a profit at the end, you can withdraw your winnings.
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Best 300% Casino Welcome Bonuses in Ireland 2025
| 500 Casino | 🎁 300% First Deposit Bonus up to €1,500 – Code: 500WELCOME |
| ProntoBet Casino | 🔥 300% Welcome Offer up to €2,000 + 50 Free Spins |
| 21 Casino | 💎 300% Casino Bonus up to €1,200 – Code: 21BOOST |
| Tsars Casino | 💰 300% Matched Bonus up to €1,500 + 100 Free Spins |
| Spin Casino | 🎟️ 300% Bonus on First Deposit up to €800 |
| Genting Casino | 🚀 300% Deposit Match up to €2,500 – Code: GENT300 |
| Captain Cooks Casino | 🎲 300% High Roller Bonus up to €5,000 |
| Yukon Gold Casino | 💸 300% Casino Boost up to €1,000 + 75 Free Spins |
| Lucky Hunter Casino | 🏆 300% Crypto Bonus up to €3,000 – Code: LUCKY300 |
| Rolling Slots Casino | 🎮 300% Reload Bonus up to €1,200 + 50 Free Spins |
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