Are you on the hunt for a 400% casino bonus you can claim in Ireland?
Competition between online casinos has driven bonus offers up, but the bigger the casino bonus, the rarer it tends to be. A 400% bonus multiplies your first deposit by four, then adds it to your original deposit, giving you five times your starting bankroll to play with. If you are trying a new Irish online casino, starting with a 400% match can extend your playtime, help you try more games, and smooth out variance a bit.
These are the best 400% Irish casino bonuses available right now!
18+ | Terms & conditions apply.
- ✓ Take Olympus (Betsoft)
- ✓ 100% up to €500
- ✓ 50 Bonus Spins
18+ | Terms & conditions apply.
- ✓ Gates of Olympus (Pragmatic Play)
- ✓ 100% up to €920
- ✓ 200 Bonus Spins
18+. New players only. Exclusive bonus on registration available only through our promotional link: 200 Free Spins on Gates of Olympus (Pragmatic Play). No bonus code required. 20x wagering requirement on bonus money. Maximum bet €7. Maximum win €15. Email confirmation required. Minimum deposit of €4.33 required to withdraw winnings. Credited directly to your account balance upon registration. First deposit bonus: 100% up to €920 + 200 Free Spins. Minimum deposit €10. 45x wagering requirement. Minimum bet €0.1. Maximum bet €4.6. Maximum win capped at 4x the bonus amount. Note: EUR amounts have been converted to local currency using the latest available exchange rate. Original casino terms prevail in case of discrepancy. General Terms & Conditions apply.
18+ | Terms & conditions apply. | Slotbox Casino
- ✓ Buffalo Wealth (Betsoft)
- ✓ 100% up to €100
- ✓ €20 Casino Min. Dep.
18+. New players only. Exclusive bonus on registration available only through our promotional link: 25 Free Spins on Buffalo Wealth (Betsoft). 35x wagering requirement on bonus money. Maximum bet €5. Maximum cashout €50. No deposit required. No verification needed. Bonus available as a pop-up and in the Rewards menu after registration. First deposit bonus: 100% up to €100 + 100 Free Spins. Minimum deposit €20. 40x wagering requirement on the bonus and 35x on Free Spins winnings, to be completed within 7 days. Maximum cashout from bonus winnings is €3,000. Maximum cashout from Free Spins winnings is €300. General Terms & Conditions apply.
18+ | Terms & conditions apply. | Mr Fortune Casino
- ✓ €700 Casino Bonus
- ✓ 50 Bonus Spins
- ✓ Fruit Zen
18+ | Terms & conditions apply. | BCasino
- ✓ 100% up to €500
- ✓ 50 Bonus Spins
- ✓ Fruit Zen
18+ | Terms & conditions apply.
- ✓ Bonus code: 100WIN
- ✓ Available on 5 selected slots
- ✓ 100% up to €1000 + 25 FS
18+. New players only. Exclusive bonus on registration available only through our promotional link: 100 Free Spins on Royal Joker: Hold and Win (Playson), Big Bass Bonanza (Pragmatic Play), Gold Rush with Johnny Cash (BGaming), Book of Demi Gods 2 (Spinomenal), and Starburst (NetEnt). Bonus code: 100WIN. 35x wagering requirement on bonus money. Maximum bet €5. Maximum cashout €50. No verification required. After registration, go to the bonus section in your account and enter the bonus code. Minimum deposit €20 required to withdraw winnings. First deposit bonus: 100% up to €1,000 + 25 Free Spins on Lucky Wheel (Red Rake). Minimum deposit €20. Maximum bet €5. Maximum cashout €50. General Terms & Conditions apply.
18+ | Terms & conditions apply. | Galactic Wins Casino
- ✓ Tiger's Claw (Betsoft)
- ✓ 100% up to €500
- ✓ 50 Spins on Fruit Zen
18+ | Terms & conditions apply.
- ✓ Bonus code: FREE10
- ✓ Yummy Dumplings (Gamzix)
- ✓ 100% up to €300
18+. New players only. Exclusive Bonus on Registration: 10 Free Spins on Yummy Dumplings (Gamzix). Bonus code: FREE10. Wagering requirements 45x with bonus money. Max bet €5. Max win €30. Max withdrawal €10,000. Email and KYC verification required. Bonus is automatically credited to the bonus balance after registration. Min deposit €10 required to withdraw winnings. Deposit Bonus offer: 100% up to €300 + 200 Free Spins + 3 coins on the 1st deposit. Min deposit €20. Wagering requirements 45x. Max bet €5. Max withdrawal from cash bonus 10x the deposit amount. Max withdrawal from Free Spins €100. Terms apply.
18+ | Terms & conditions apply.
- ✓ Bonus code: 100WIN
- ✓ Available on 5 selected slots
- ✓ 50% up to €2500 + 20 FS
18+. New players only. Exclusive bonus on registration available only through our promotional link: 100 Free Spins on Royal Joker: Hold and Win (Playson), Big Bass Bonanza (Pragmatic Play), Gold Rush with Johnny Cash (BGaming), Book of Demi Gods 2 (Spinomenal), or Starburst (NetEnt). Bonus code: 100WIN. 35x wagering requirement. Maximum bet €5. Maximum cashout €50. No verification required. Minimum deposit of €20 required to withdraw winnings. Enter the promo code in the bonus section of your account after registration. First deposit bonus: 50% up to €2,500 + 20 Bonus Spins on Book of the Fallen (Pragmatic Play), Coin Strike Hold and Win (Playson), Big Bass Splash (Pragmatic Play), or Gold Rush with Johnny Cash (BGaming). Minimum deposit €20. Maximum bet €5. Maximum win €50. General Terms & Conditions apply.
18+ | Terms & conditions apply.
- ✓ 275% Bonus
- ✓ On First Deposit
- ✓ 1st Dep. Bonus Code: F01
18+. New players only. Exclusive bonus on registration available only through our promotional link: €20 Free Cash. 50x wagering requirement. Maximum bet €3. Maximum cashout €20. Email confirmation required. Minimum deposit of €10 required to withdraw winnings. First deposit bonus: 275% bonus. Promo code: F01. 30x wagering requirement. Maximum bet €3. Maximum cashout limited to 20x your deposit. Minimum deposit €10. Note: Original casino terms prevail in case of discrepancy. General Terms & Conditions apply.
18+ | Terms & conditions apply. | BetandPlay Casino
- ✓ 250 Bonus Spins
- ✓ Big Wild Buffalo (Belatra)
- ✓ 1 Wheel Spin
18+. New players only. 125% bonus up to €1000 from €20 deposit, 50x wagering, max bet €5, max cashout €5000. 250 Free Spins on Belatra’s Big Wild Buffalo (50/day for 5 days) after qualifying deposit; FS winnings 50x wagering, max cashout €1000; FS valid 3 days, bonus valid 7 days. 1 Wheel Spin on 1st & 2nd deposits only; no prize without deposit; wheel cannot be reopened; wheel winnings wagering: FS x25, cash x5. Lucky Spin Silver terms and general terms apply. Terms apply.
18+ | Terms & conditions apply.
- ✓ Candy Craze (Evoplay)
- ✓ 100% up to €500
- ✓ 100 Bonus Spins
18+. New players only. 70 Free Spins on Candy Craze (Evoplay), wagering 5x, max bet €5, max win capped at 3x winnings from Free Spins, phone verification required, €20 min. deposit to withdraw winnings. First deposit bonus: Deposit min. €10 after the first hour, get 100% bonus up to €500, wagering 40x on bonus, max transfer €500, max cashout x5 the bonus amount. Includes 100 Bonus Spins on Big Bass Splash, wagering 40x, max cashout €100 from spins. Terms apply.
18+ | Terms & conditions apply.
- ✓ Aloha King Elvis
- ✓ 100% up to €500
- ✓ 100 Bonus Spins
18+ | Terms & conditions apply.
- ✓ Bonus code: TOD35
- ✓ Tower of Fortuna (Betsoft)
- ✓ Wager 0x
18+. New players only. 35 Free Spins on Tower of Fortuna (Betsoft), CODE: TOD35, no wagering, max bet €4, max win €20. Email verification required. Bonus must be activated with the bonus code in the player profile. Min. deposit €20 required to withdraw winnings. Welcome Bonus Package: 1st deposit 100% up to €300, 2nd deposit 50% up to €400, 3rd deposit 100% up to €300. Min. deposit €20 per bonus, bonus must be selected before deposit. No wagering requirements. Max bet €4 while bonus is active. Max withdrawal 5x bonus amount. Bonus is forfeited upon withdrawal request. Terms apply.
18+ | Terms & conditions apply.
- ✓ Bonus code: OLYMP50
- ✓ Book of Books (Peter &Sons)
- ✓ 0x Wager
18+. New players only. 50 Free Spins on Book of Books (Peter & Sons), CODE: OLYMP50, 0x wagering, max cashout €30, email verification required. Activate the bonus code during registration in your profile. Min. deposit €20 required to withdraw winnings. First Deposit Bonus: 100% up to €300 + 50 Bonus Spins on Book of Zeus, wager-free, min. deposit €20. Terms apply.
18+ | Terms & conditions apply.
- ✓ 110 Bonus Spins
- ✓ Elvis Frog TRUEWAYS (BGaming)
- ✓ Bonus code: REELS
18+. New players only. CODE: REELS. First deposit bonus 110% up to €1,000 on deposits from €20. Includes 110 Bonus Spins on Elvis Frog TRUEWAYS, 55 credited on day 1 and 55 on day 2. Bonus terms, wagering requirements and withdrawal limits may apply. Terms apply.
18+ | Terms & conditions apply.
- ✓ Available on 5 slots
- ✓ Bonus Code: 100WIN
- ✓ 100% up to €1500 + 50 FS
18+. New players only. Exclusive bonus on registration available only through our promotional link: 100 Free Spins on Royal Joker: Hold and Win (Playson), Big Bass Bonanza (Pragmatic Play), Gold Rush with Johnny Cash (BGaming), Book of Demi Gods 2 (Spinomenal), or Starburst (NetEnt). Bonus code: 100WIN. 35x wagering requirement. Maximum bet €5. Maximum cashout €50. No verification required. Minimum deposit of €20 required to withdraw winnings. Enter the promo code in the bonus section of your account after registration. First deposit bonus: 100% up to €1,500 + 50 Bonus Spins on Book of the Fallen (Pragmatic Play), Coin Strike Hold and Win (Playson), Big Bass Splash (Pragmatic Play), or Gold Rush with Johnny Cash (BGaming). Minimum deposit €20. Maximum bet €5. Maximum win €50. General Terms & Conditions apply.
18+ | Terms & conditions apply. | 24Casino
- ✓ Big Bass Splash / Voodoo People
- ✓ 100% up to €500
- ✓ 150 Bonus Spins
18+. New players only. 24 Free Spins on Big Bass Splash (Pragmatic Play) or Voodoo People (BGaming), 50x wagering, max bet €5, max win €5. Email verification required. Bonus activated via notification / promo section. First Deposit Bonus: 100% up to €500 + 150 Free Spins, min. deposit €20. Get 50 Free Spins on Sweet Bonanza instantly plus 20 Bonus Spins per day for 5 consecutive days on Big Bass Bonanza, John Hunter Book of Tut, Gates of Olympus 1000, Sugar Rush and Hot to Burn. Bonus Spins must be activated in the promo section. Terms apply.
18+ | Terms & conditions apply.
- ✓ Wild West TRUEWAYS (BGaming)
- ✓ Bonus Code: 30WW
- ✓ 100% up to €777
18+. New players only. 30 Free Spins on Wild West TRUEWAYS (BGaming), CODE: 30WW, 40x wagering, max bet €1, max win €50. Email verification required. Bonus available in the Wallet. Min. deposit €20 required to withdraw winnings. First Deposit Bonus: 100% up to €777 + 100 Free Spins on Elvis Frog TRUEWAYS (BGaming), CODE: SLOTS, min. deposit €20, 40x wagering on bonus and Free Spins winnings, max bet €5, max win 10x bonus amount. 50 Free Spins credited instantly and 50 the next day, activation required within 1 day. Bonus valid for 5 days. Terms apply.
18+ | Terms & conditions apply.
- ✓ Jewel Boom Super Drop (BGaming)
- ✓ 120% up to €2000
- ✓ 100 Bonus Spins
18+. New players only. 25 Free Spins on Jewel Boom Super Drop (BGaming), 40x wagering, max bet $5, max win $100. Email verification required. Bonus available in the Profile after registration and email confirmation. Min. deposit $30 required to withdraw winnings. First Deposit Bonus: 120% up to $2,000 + 100 Bonus Spins on Elvis Frog Trueways (BGaming), min. deposit $30, 40x wagering, valid for 7 days. Terms apply.
18+ | Terms & conditions apply.
- ✓ Bonus code: SPIN50WIN
- ✓ Avaliable on 5 slots
- ✓ €500 Bonus + 150 Spins
18+. New players only. No Deposit Bonus: 50 Free Spins on selected slots (Royal Joker: Hold and Win, Big Bass Bonanza, Book of Demi Gods 2, Starburst, Gold Rush with Johnny Cash). Code: SPIN50WIN. Email verification required. Bonus available in the Bonus section. Wagering 35x. Max bet €5. Max win €50. Min. deposit €10 required to withdraw winnings. First Deposit Bonus: 100% up to €500 + 150 Free Spins. Bonus wagering applies. Bonus valid 7 days. Max bet €5 during wagering. Terms apply.
18+ | Terms & conditions apply.
- ✓ Joker Stoker (Endorphina)
- ✓ 100% up to €500
- ✓ 100 Bonus Spins
18+. New players only. 50 Free Spins on Joker Stoker (Endorphina), wagering 5x, min. deposit €10 or currency equivalent to withdraw winnings, phone and email verification + KYC required, bonus available in-game, max conversion to real balance x3 Free Spins winnings after wagering. 100% first deposit bonus up to €500 + 100 Bonus Spins (50 per day) on Big Bass Splash (Pragmatic Play), min. deposit €10, wagering 40x for bonus and Bonus Spins, max cashout x5 the deposit amount, bonus must be activated before deposit, each bonus step valid 72h and must be completed in order, bonus expires in 5 days if wagering is not completed. Terms apply.
18+ | Terms & conditions apply.
- ✓ Sweet Bonanza (Pragmatic)
- ✓ 150% Bonus & 20 Bonus Spins
- ✓ Gates of Olympus 1000 (Pragmatic)
18+. New players only. 50 Free Spins on Sweet Bonanza (Pragmatic Play), 30x wagering, max bet €5, max win €10. Email & phone verification required, plus KYC with at least 1 document. Bonus available directly in the game. Min. deposit €5 to withdraw winnings. 1st deposit bonus: 150% + 20 Bonus Spins on Gates of Olympus 1000 (Pragmatic Play) for deposits €10–€20, wagering 40x on bonus and spins, max bonus €500, max cashout x5 of bonus amount up to €500, max conversion from spins winnings €20. Terms apply.
18+ | Terms & conditions apply.
- ✓ Big Bass Splash (Pragmatic Play)
- ✓ 100% up to €300
- ✓ 100 Bonus Spins
18+. New players only. 50 Free Spins on Big Bass Splash (Pragmatic Play), 35x wagering, max bet €5, max win €25. Phone verification required. To claim, launch a qualifying slot. Welcome Bonus: 100% up to €300 + 100 Bonus Spins on Big Bass Splash (Pragmatic Play) for deposits from €10. Bonus must be activated before deposit. Bonus valid for 48 hours, wagering 40x on cash bonus and 30x on spins, spins valid for 2 days. Max conversion x5 bonus amount. Bonus expires if wagering is not completed within 5 days. Terms apply.
18+ | Terms & conditions apply. | SlotoZen Casino
- ✓ Dragon’s nest (Mascot)
- ✓ 100% up to €300
- ✓ 100 Bonus Spins
18+ | Terms & conditions apply. | Wolfy Casino
- ✓ Bonus code: TAM35
- ✓ Tower of Fortuna (Betsoft)
- ✓ Wager 0x
18+. New players only. 35 Free Spins on Tower of Fortuna (Betsoft), CODE: TAM35, no wagering, max win €20. Email verification required. Bonus must be activated with the bonus code in the player profile. Min. deposit €20 required to withdraw winnings. Welcome Bonus Package: 1st deposit 100% up to €200, 2nd deposit 50% up to €300, 3rd deposit 50% up to €400, 4th deposit 100% up to €100. Min. deposit €20 per bonus. No wagering requirements. Max bet €4 while bonus is active. Max withdrawal 5x bonus amount. Bonus is forfeited upon withdrawal request. Terms apply.
18+ | Terms & conditions apply. | Jackpoty Casino
- ✓ 100 Bonus Spins
- ✓ Fortune Chest (Endorphina)
- ✓ Bonus code: FDB500
18+ | Terms & conditions apply.
- ✓ €5 No Deposit Casino Bonus
- ✓ Exclusive Bonus Codes
- ✓ Newest Online Casinos
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ €9 Minimum Deposit
- ✓ 20% Cashback
18+. New players only. First Deposit Bonus: 200% up to €878 + 100 Bonus Spins, min. deposit €9, 60x wagering on deposit and bonus. Terms apply.
18+ | Terms & conditions apply. | Winawin Casino
- ✓ 100 Bonus Spins
- ✓ Bonus code: WIN100
- ✓ Alien fruits 2 (BGaming)
18+ | Terms & conditions apply.
- ✓ Bonus code: TOP60SUMMER
- ✓ Le Bandit (Hacksaw)
- ✓ 200% up to €500
18+. New players only. 60 Free Spins on Le Bandit (Hacksaw), CODE: Top60summer, 40x wagering on bonus funds, max. bet €5, unlimited winnings, max. cashout €60. KYC verification required. VPN friendly. Min. deposit €20 required to withdraw winnings. Welcome Bonus: 200% up to €500 + 100 Bonus Spins on Dog House (Pragmatic Play), min. deposit €20, valid on the first 4 deposits. Terms apply.
18+ | Terms & conditions apply. | Wanted Win Casino
- ✓ 100 Bonus Spins
- ✓ BGaming slots
- ✓ €20 Minimum deposit
18+ | Terms & conditions apply.
- ✓ 100% up to €500
- ✓ 50 Free Spins
- ✓ Fruit Zen
18+. New players only. No Deposit Bonus: €5 on registration. Wagering requirement 99x. Maximum bet €4. Maximum win €200. Email confirmation required. Bonus is activated automatically once the player signs up. 1st Deposit Bonus: Deposit €20 and receive a 100% bonus up to €500 + 50 Free Spins on Fruit Zen with your first deposit. Wagering requirement 40x (deposit + bonus) and 25x on Free Spins winnings. Maximum bet while wagering is €4. Maximum promotional winnings capped at €1,000. Bonus expires within 7 days if wagering is not completed. Free Spins winnings are credited as bonus funds. Feature buys, low-risk betting strategies, and switching between low/high contribution games are prohibited while wagering. Free Spins are available on Fruit Zen, Coins of Zeus - Hold & Win™ and Book of Gold: Multichance. General Terms & Conditions apply.
18+ | Terms & conditions apply. | Verde Casino
- ✓ Book of Sirens
- ✓ Wagering x3
- ✓ 120% up to €300
18+ | Terms & conditions apply.
- ✓ Aztec Magic Deluxe
- ✓ €650 Bonus + 50 Spins
- ✓ €10 Minimum Deposit
18+ | Terms & conditions apply. | igo.bet Casino
- ✓ 50 Bonus Spins
- ✓ Bonus Code: 150IGSN
- ✓ On your first deposit
18+ | Terms & conditions apply.
- ✓ Wild Cash (BGaming)
- ✓ Bonus code: CASH
- ✓ 100% up to 1.5 BTC
18+. New players only. 50 Free Spins on Wild Cash (BGaming) with code CASH, wagering 45x, max win €50; no account verification required; enter code during sign-up, activate via notification or in account; no minimum deposit required to withdraw, but winnings must be wagered and meet minimum cashout balance. First deposit bonus: 100% up to 1.5 BTC + 100 Bonus Spins on Aloha King Elvis, min. deposit €20, wagering 35x (bonus and spins), max winnings from spins €100. Terms apply.
18+ | Terms & conditions apply.
- ✓ Super Sweets (Betsoft)
- ✓ Bonus Code: CRLS20
- ✓ 0x Wager
18+. New players only. 20 Free Spins on Super Sweets (Betsoft), CODE: CRLS20, 0x wagering, max withdrawal 5x the deposit amount. Email verification required. Activate the bonus code in the Bonus section of your profile after registration. Min. deposit €20 required to withdraw winnings. First Deposit Bonus: CODE: WELCOME100, 100% up to €500, min. deposit €20, no wagering requirements, max bet €3. Terms apply.
18+ | Terms & conditions apply. | Rocket Casino
- ✓ 50 Bonus Spins
- ✓ Aztec Magic Deluxe (Bgaming)
- ✓ €20 Min. Deposit
18+ | Terms & conditions apply.
- ✓ Super Sweets (Betsoft)
- ✓ Bonus Code: CRLS20
- ✓ 0x Wager
18+. New players only. 20 Free Spins on Super Sweets (Betsoft), CODE: CRLS20, 0x wagering, max withdrawal 5x the deposit amount. Email verification required. Activate the bonus code in the Bonus section of your profile after registration. Min. deposit €20 required to withdraw winnings. First Deposit Bonus: CODE: STARS1, 100% up to €300, min. deposit €20, no wagering requirements, max bet €3. Terms apply.
18+ | Terms & conditions apply.
- ✓ Gift Rush (Bgaming)
- ✓ 100% up to €500
- ✓ 20 Bonus Spins
18+. New players only. 30 Free Spins on Gift Rush (BGaming), 45x wagering, max bet €5, max win €50; email & phone verification required; bonus notification shown after registration; €10 minimum deposit to withdraw. Christmas Welcome Bonus: 110% up to €500 + 150 Free Spins + 3 Coins; 20 FS from €20 deposit, 150 FS from €50 deposit, 30 FS per day for 5 days; wagering 45x, €5 max bet, FS winnings capped at €100, cash bonus payout capped at 10x deposit; bonus valid 5 days. Terms apply.
18+ | Terms & conditions apply.
- ✓ Super Sweets (Betsoft)
- ✓ Bonus Code: CRLS20
- ✓ 0x Wager
18+. New players only. 20 Free Spins on Super Sweets (Betsoft), CODE: CRLS20, 0x wagering, max cashout €100. Email verification required. Activate the bonus code in the Bonus section of your profile after registration. Min. deposit €20 required to withdraw winnings. First Deposit Bonus: CODE: ORCA1, 100% up to €500, min. deposit €20, no wagering requirements, max bet €3, max withdrawal 5x the deposit amount. Terms apply.
18+ | Terms & conditions apply. | Thor Casino
- ✓ Super Sweets (Betsoft)
- ✓ Bonus Code: CRLS20
- ✓ 0x Wager
18+. New players only. 20 Free Spins on Super Sweets (Betsoft), CODE: CRLS20, 0x wagering, max withdrawal 5x the deposit amount. Email verification required. Activate the bonus code in the Bonus section of your profile after registration. Min. deposit €20 required to withdraw winnings. First Deposit Bonus: CODE: THOR1, 100% up to €200 + 25 Bonus Spins on Thor Hammer Time, min. deposit €20. Terms apply.
18+ | Terms & conditions apply.
- ✓ Primal Hunt
- ✓ Bonus Code: DLD20
- ✓ Wager Free
18+ | Terms & conditions apply. | Cobra Casino
- ✓ Beer Bonanza / Legacy Of Cobra
- ✓ 100% up to €1,000
- ✓ 250 Bonus Spins
18+ | Terms & conditions apply. | Ice Casino
- ✓ Book of Fallen
- ✓ 120% up to €300
- ✓ 120 Extra Spins
18+ | Terms & conditions apply.
- ✓ FruitMillion (Bgaming)
- ✓ Bonus Code: SMAFIA30
- ✓ 100% up to €5000 + up to 200 FS
18+. New players only. NDB: 30 Free Spins on FruitMillion (BGaming), CODE: SMAFIA30, 40x wagering requirement, max bet €5, max win €50. No account verification required. Bonus credited directly to the player account. First Deposit Bonus: 100% up to €/$5,000 + up to 200 Bonus Spins depending on the deposit amount, CODE: SM1. Terms apply.
18+ | Terms & conditions apply. | SpinsCastle Casino
- ✓ 200 Bonus Spins
- ✓ Bonus Code: CASTLE1
- ✓ On Your First Deposit
18+ | Terms & conditions apply.
- ✓ Vikings Go Berzerk (Yggdrasil)
- ✓ 100% up to €500
- ✓ 100 Bonus Spins
18+ | Terms & conditions apply.
- ✓ 150% up to €150
- ✓ 20 Bonus Spins
- ✓ Vikings Go Berzerk (Yggdrasil)
18+ | Terms & conditions apply. | Merlin Casino
- ✓ Caishen's Arrival (Betsoft)
- ✓ Bonus code: LUCKY20
- ✓ 120% + 100 Wager-Free Spins
18+ | Terms & conditions apply.
- ✓ 50 Gratis Spins
- ✓ Gemhalla (Bgaming)
- ✓ Bonus Code: WIN500
18+. New players only. Exclusive Deposit Bonus: 150% up to €500 + 50 Bonus Spins on Gemhalla (BGaming). Bonus code required and available to copy from the promotional offer above. General Terms & Conditions apply.
18+ | Terms & conditions apply.
- ✓ 136 Bonus Spins
- ✓ Jingle Spin
- ✓ Bonus Code: JINGLE136
18+ | Terms & conditions apply.
- ✓ Take Olympus (Betsoft)
- ✓ €1000 Bonus + 100 Spins
- ✓ Gates of Olympus (Pragmatic)
18+ | Terms & conditions apply. | Vulkan Vegas Casino
- ✓ Book of Dead
- ✓ 120% up to €300
- ✓ 70 Bonus Spins
18+ | Terms & conditions apply. | Coolzino Casino
- ✓ Bonus Code: BLITZ3
- ✓ 100% up to €150
- ✓ 150 Bonus Spins
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ Boom! Boom! Gold! (Booongo)
- ✓ €20 Min. Deposit
18+ | Terms & conditions apply.
- ✓ €20 Deposit
- ✓ Choose your slot
- ✓ Multiple Bonuses
18+. New players only. Min deposit €20. Rookie Rush Welcome Offer in three stages: wager €50 for 50 Bonus Spins; wager €250 for 200 Bonus Spins; wager €500 for 250 Bonus Spins. Wagering must be completed on selected Pragmatic Play slots. Bonus Spins available on: Sweet Bonanza Super Scatter, Gates of Olympus Super Scatter, Sugar Rush 1000, Floating Dragon, Zeus vs Hades Gods of War, Brick House Bonanza, Wisdom of Athena 1000, Big Bass Splash. Wagering must be completed within 7 days; Bonus Spins expire 72 hours after being credited. Wins from Bonus Spins credited as cash. Currency equivalents apply for non-USD players. Terms apply.
18+ | Terms & conditions apply. | BetLabel Casino
- ✓ 150 Bonus Spins
- ✓ €10 Minimum deposit
- ✓ Mariachi Afortunado (Mancala)
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ Big Bass Splash
- ✓ Non-Sticky Bonus
18+ | Terms & conditions apply.
- ✓ Lady Wolf Moon (Megaways)
- ✓ €100 Bonus & 75 Spins
- ✓ Minimum deposit €20
18+ | Terms & conditions apply. | Prontobet Casino
- ✓ On first deposit
- ✓ 10% Daily Cashback
- ✓ €10 Min. Deposit
18+ | Terms & conditions apply.
- ✓ 50 Bonus Spins
- ✓ Spinman (Hacksaw)
- ✓ €20 Min. Deposit
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ 1 Bonus Crab
- ✓ €10 Minimum deposit
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ 1 Bonus Crab
- ✓ €20 Minimum deposit
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ Sugar Rush (Pragmatic Play)
- ✓ Sports Betting
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ On Your First Deposit
- ✓ Sports Betting
18+ | Terms & conditions apply.
- ✓ 50 Bonus Spins
- ✓ Wild Cash (BGaming)
- ✓ 20% Weekly Cashback
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ 1 Bonus Crab
- ✓ 15% Weekly Cashback
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ 1 Bonus Crab
- ✓ Weekly Cashback 15%
18+ | Terms & conditions apply. | Rooli Casino
- ✓ Book of Cats (Bgaming)
- ✓ 100% up to €500
- ✓ 200 Bonus Spins
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ 1 Bonus Crab
- ✓ Weekly Cashback 15%
18+ | Terms & conditions apply. | .. | Gransino Casino
- ✓ 200 Bonus Spins
- ✓ 1 Bonus Crab
- ✓ Weekly Cashback 15%
18+ | Terms & conditions apply. | Dazard Casino
- ✓ 100 Bonus Spins
- ✓ Bonus code: DZ100
- ✓ €10 Minimum deposit
18+ | Terms & conditions apply. | Seven Casino
- ✓ 1st Bonus
- ✓ Wagering Requirement: 10x
- ✓ Sports Betting
18+ | Terms & conditions apply. | Winstler Casino
- ✓ Up to €500
- ✓ On first deposit
- ✓ Sports Betting
18+ | Terms & conditions apply. | iWild Online Casino
- ✓ 200 Bonus Spins
- ✓ Sweet Bonanza
- ✓ On first deposit
18+ | Terms & conditions apply.
- ✓ Captain's Quest: Treasure Island
- ✓ 200% up to €1,000
- ✓ 100 Bonus Spins on Chili Pop
18+ | Terms & conditions apply. | Snatch Casino
- ✓ 100 Bonus Spins
- ✓ Dog House (Pragmatic Play)
- ✓ On first deposit
18+ | Terms & conditions apply. | Asino Casino
- ✓ Elvis Frog TRUEWAYS
- ✓ 50 Bonus Spins
- ✓ Bonus code: START
18+ | Terms & conditions apply | Windetta Casino
- ✓ Fire In The Hole xBomb
- ✓ Code: EXCL15
- ✓ Choose your Welcome Bonus
18+ | Terms & conditions apply. | Spin Time Casino
- ✓ Up to €250
- ✓ 10% Cashback
- ✓ Sports Betting
18+ | Terms & conditions apply.
- ✓ 25 Bonus Spins
- ✓ Wilds of Fortune (Betsoft)
- ✓ Bonus Code: PBWEL125
18+ | Terms & conditions apply. | Voodoo Casino
- ✓ 100 Bonus Spins
- ✓ Choose within 4 slots
- ✓ €20 Min. Deposit
18+ | Terms & conditions apply.
- ✓ 150 Bonus Spins
- ✓ 20% Weekly cashback
- ✓ Moblie App avaliable
18+ | Terms & conditions apply. | Winnerz Casino
- ✓ 100 Bonus Spins
- ✓ Gates of Olympus 1000
- ✓ €20 Minimum Deposit
18+ | Terms & conditions apply. | Izzi Casino
- ✓ Izzi Art (BGaming)
- ✓ €20 Minimum Deposit
- ✓ 150% Sport Bonus
18+ | Terms & conditions apply.
- ✓ 10% Daily Cashback
- ✓ Live Casino
- ✓ €20 Minimum Deposit
18+ | Terms & conditions apply. | Energy Casino
- ✓ Gates of Energy Casino
- ✓ €200 Bonus + 400 Spins
- ✓ 2X Win Multiplier
18+ | Terms & conditions apply.
- ✓ 30 Bonus Spins
- ✓ Juicy Fruits 27 Ways
- ✓ €10 Min. Deposit
18+ | Terms & conditions apply.
- ✓ €20 Minimum Deposit
- ✓ On your first deposit
- ✓ Live Casino & Sports betting
18+ | Terms & conditions apply.
- ✓ Red Hot 100 (TrueLab)
- ✓ 100% up to €250
- ✓ €20 Minimum deposit
18+ | Terms & conditions apply. | Crown Slots Casino
- ✓ 100 Bonus Spins
- ✓ €20 Minimum Deposit
- ✓ On first deposit
18+ | Terms & conditions apply. | NuggetSlots Casino
- ✓ 100% up to €200
- ✓ 10 extra raffle tickets
- ✓ Code: GOLDNUGGET
18+ | Terms & conditions apply. | SkyCrown Casino
- ✓ Piggy Bank Bills (Pragmatic)
- ✓ 120% up to €500
- ✓ 125 Bonus Spins
18+ | Terms & conditions apply. | Gratowin Casino
- ✓ 100% up to €1000
- ✓ 1st deposit Code: GRATO100
- ✓ Min. Deposit €10
18+ | Terms & conditions apply. | Lucky Hunter Casino
- ✓ Gold Rush With Johnny Cash
- ✓ 100% up to €4,000
- ✓ 150 Bonus Spins
18+ | Terms & conditions apply. | NovaJackpot Casino
- ✓ Lucky Dwarfs (Ela Games)
- ✓ 100% up to €500
- ✓ 200 Spins & 1 Bonus Crab
18+. New players only. 30 Free Spins on Lucky Dwarfs (Ela Games). Wagering 40x. Max bet €5. Max cashout €30. Min deposit €20 to withdraw winnings. 1st deposit: 100% bonus up to €1,000 + 100 Free Spins. Wagering 35x (deposit + bonus). Max bet €5. Terms apply.
18+ | Terms & conditions apply.
- ✓ Fortune Three Xmas (Gamebeat)
- ✓ Bonus Code: MERRYPLAY
- ✓ €2000 Bonus + 100 Spins
18+ | Terms & conditions apply.
- ✓ Deep Sea
- ✓ CODE: DEEPBIT
- ✓ 100% up to €400
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ 1 Bonus Crab
- ✓ 15% Weekly Cashback
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ €20 Minimum Deposit
- ✓ On first deposit
18+ | Terms & conditions apply.
- ✓ On your first deposit
- ✓ Sports betting
- ✓ Multiple bonuses
18+ | Terms & conditions apply.
- ✓ Code: PLAYO100
- ✓ €10 Min. deposit
- ✓ Weekly cashback up to 20%
18+ | Terms & conditions apply.
- ✓ On your first deposit
- ✓ Multiple bonuses
- ✓ Live Casino & Sports Betting
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ 1 Bonus Crab
- ✓ €20 Min. Deposit
18+ | Terms & conditions apply.
- ✓ Sweet Bonanza
- ✓ 100% up to €750
- ✓ 100 Bonus Spins
18+ | Terms & conditions apply.
- ✓ Win up to €10,000
- ✓ No Wagering Requirements
- ✓ On your first deposit
18+ | Terms & conditions apply.
- ✓ Take Olympus (Betsoft)
- ✓ 200% up to €1,000
- ✓ 100 Bonus Spins on Sugar Pop
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ Gates of Olympus 1000
- ✓ $15 Minimum deposit
18+ | Terms & conditions apply.
- ✓ 100 bonus spins
- ✓ €20 minimum deposit
- ✓ On your first deposit
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ Sweet Bonanza 1000
- ✓ $15 Minimum deposit
18+ | Terms & conditions apply.
- ✓ Gold Rush with Johnny Cash
- ✓ 50 Bonus spins
- ✓ Bonus code: FIRST
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ Book of the Fallen (Pragmatic)
- ✓ 1 Bonus Crab
18+ | Terms & conditions apply.
- ✓ 75 bonus spins
- ✓ Sweet Bonanza
- ✓ €20 minimum deposit
18+ | Terms & conditions apply. | Arcanebet Casino
- ✓ Northern Sky (Quickspin)
- ✓ 100% up to €200
- ✓ 50 Spins on Book of Dead
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ €20 minimum deposit
- ✓ 15% Weekly Cashback
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ €20 minimum deposit
- ✓ On first deposit
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ €20 minimum deposit
- ✓ On first deposit
18+ | Terms & conditions apply.
- ✓ Skulls UP (Quickspin)
- ✓ 150% up to €150
- ✓ 50 Spins on Sakura Fortune
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ €20 Minimum Deposit
- ✓ Sports Betting
18+ | Terms & conditions apply.
- ✓ All Lucky Clovers 5
- ✓ 100% up to €200
- ✓ 20 Bonus Spins
18+ | Terms & conditions apply.
- ✓ On first deposit
- ✓ €1000 Welcome Package
- ✓ 15% Weekly Cashback
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ Ask for the game on chat
- ✓ €20 Minimum Deposit
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ Elvis Frog in Vegas
- ✓ Up to 1k Cashback
18+ | Terms & conditions apply. | ExciteWin Casino
- ✓ 100% Bonus
- ✓ 200 Bonus Spins
- ✓ Weekly Cashback 15%
18+ | Terms & conditions apply. | Trickz Casino
- ✓ 100 Bonus Spins
- ✓ Pop Cop (Peter & Sons)
- ✓ €20 Minimim deposits
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ Choose your game
- ✓ €20 Minimum deposit
18+ | Terms & conditions apply.
- ✓ 9 Dragon Kings (Platipus)
- ✓ Bonus code: HAPPYPLAY
- ✓ 150% up to €1000
18+. New players only. No Deposit Bonus: 35 Free Spins on 9 Dragon Kings (Platipus). Code: HAPPYPLAY. Email verification required. Wagering 40x. Max bet €1. Maximum bonus value €3. Maximum cashout from No Deposit Free Spins €50. Welcome Bonus: Option 1 – 150% up to €1,000 + 50 Free Spins (min deposit €20). Option 2 – 175% up to €1,500 + 75 Free Spins (min deposit €50). Option 3 – 200% up to €3,000 + 100 Free Spins (min deposit €100). Wagering 35x. Maximum win 3x bonus amount. Terms apply.
18+ | Terms & conditions apply.
- ✓ Code: 24SWEL200
- ✓ €20 Minimum deposit
- ✓ 1st Bonus
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ 3 Coins
- ✓ €10 Minimum deposit
18+ | Terms & conditions apply.
- ✓ 70 Bonus Spins
- ✓ Book of Dead
- ✓ Code: WELCOME
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ Book of Dead
- ✓ Mystery Joker
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ Big Bass Bonanza
- ✓ €20 Minimum Deposit
18+ | Terms & conditions apply. | Gxmble Casino
- ✓ Up to €500
- ✓ On first deposit
- ✓ Wagering Requirement: 5x
18+ | Terms & conditions apply.
- ✓ 100% Bonus
- ✓ 120 Bonus Spins
- ✓ Elvis Frog in Vegas
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ John Hunter and the Book of Tut
- ✓ Book of Cats
18+ | Terms & conditions apply.
- ✓ 75 Bonus Spins
- ✓ Tombstone No Mercy (No Limit now)
- ✓ Sports Betting
18+ | Terms & conditions apply.
- ✓ 50 Bonus Spins
- ✓ €20 Minimum Deposit
- ✓ On Your First Deposit
18+. New players only. Min. deposit €20. 1st deposit: 110% bonus up to €1,000 + 50 Bonus Spins, 2nd deposit: 150% bonus up to €1,500 + 50 Bonus Spins, 3rd deposit: 100% bonus up to €2,500 + 50 Bonus Spins. Bonus wagering 25x. Bonus Spins winnings subject to 3x wagering. Max bet €10 while wagering. Maximum transferable winnings 20x the bonus amount. Requirements must be completed within 30 days. Subscription required before each stage. Terms apply.
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ Aztec Magic Deluxe
- ✓ Mobile App available
18+ | Terms & conditions apply.
- ✓ 100% up to €100
- ✓ Wagering 25x
- ✓ €10 Min Deposit
18+ | Terms & conditions apply.
- ✓ Starburst
- ✓ Code: FREESPINS50
- ✓ 100% up to €150
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ €20 Minimum deposit
- ✓ 15% Cashback
18+ | Terms & conditions apply.
- ✓ 10% Cashback
- ✓ Sports betting
- ✓ €1000 Crypto Bonus
18+ | Terms & conditions apply.
- ✓ Available on Poker & Casino
- ✓ $10 Minimum deposit
- ✓ Free MTT & Global Spins tickets
18+. New players only. 100% deposit bonus up to $3,000 on Poker & Casino, min. deposit $10. Bonus released as cashback: Poker – $1 per $10 rake/fees; Casino – $1 per $500 wagered. Includes MTT tickets & Global Spins (non-cash, non-transferable, expire in 90 days). Bonus valid 60 days. Full deposit must be wagered before withdrawal. Terms apply.
18+ | Terms & conditions apply.
- ✓ 100% Bonus
- ✓ €1 Minimum Deposit
- ✓ Sportsbook
18+ | Terms & conditions apply.
- ✓ 100% Bonus
- ✓ 100 Bonus Spins
- ✓ Book of Dead
18+ | Terms & conditions apply. | MegaRush Casino
- ✓ 100 Free Spins
- ✓ Book of Dead
- ✓ Min. deposit €10
18+ | Terms & conditions apply. | Maneki Casino
- ✓ Big Bass Keeping it Reel
- ✓ 100% up to €111
- ✓ 33 Extra Spins
18+ | Terms & conditions apply. | RANT Casino
- ✓ 100% Match Bonus
- ✓ On First Deposit
- ✓ Weekly Cashback
18+ | Terms & conditions apply. | Stelario Casino
- ✓ Sugar Rush
- ✓ Code: ZAMSINO
- ✓ 125% up to €300
18+ | Terms & conditions apply. | Booi Casino
- ✓ $300 Casino
- ✓ On First Deposit
- ✓ Weekly Cashback
18+ | Terms & conditions apply. | Spinsbro Casino
- ✓ 100 Bonus Spins
- ✓ Sugar Rush slot
- ✓ €20 Min. Deposit
18+ | Terms & conditions apply. | CosmicSlot Casino
- ✓ 100 Bonus Spins
- ✓ Water Tiger
- ✓ €20 Min. Deposit
18+ | Terms & conditions apply. | Richardd Casino
- ✓ Buffalo Richard Dale
- ✓ 100% up to $1,000
- ✓ 100 Bonus Spins
18+ | Terms & conditions apply. | WinningDays Casino
- ✓ On your first deposit
- ✓ Book of Cats
- ✓ Bitcoin accepted
18+ | Terms & conditions apply. | Casino Friday
- ✓ 200 Bonus Spins
- ✓ Day1 slot: Money train 2
- ✓ No-Sticky Bonus
18+ | Terms & conditions apply. | WildTornado Casino
- ✓ 100 Free Spins
- ✓ WILD100
- ✓ €10 minimum deposit
18+ | Terms & conditions apply.
- ✓ 20% on all your net losses
- ✓ Get up to $200 daily
- ✓ Crypto Currencies
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ Starburst
- ✓ €20 Minimum Deposit
18+ | Terms & conditions apply. | OhMySpins Casino
- ✓ 200 Bonus Spins
- ✓ Cashback Offers
- ✓ 100% Bonus
18+ | Terms & conditions apply.
- ✓ 150 Zee spins
- ✓ 500 Zee points
- ✓ 100% bonus
18+ | Terms & conditions apply. | King Billy Casino
- ✓ 100 Bonus Spins
- ✓ No Limit on Max Win
- ✓ Book of King Billy (BGaming)
18+ | Terms & conditions apply.
- ✓ 100 Bonus Spins
- ✓ JockerPro
- ✓ Starburst
18+ | Terms & conditions apply.
- ✓ 50 bonus spins
- ✓ New casino NZ
- ✓ 200% bonus
18+ | Terms & conditions apply.
- ✓ 50 Bonus Spins
- ✓ Weekend Bonus Booster
- ✓ 100 Bonus Spins on Top games
18+ | Terms & conditions apply.
- ✓ 40 Bonus Spins
- ✓ €20 Min. Deposit
- ✓ 5% Cashback
18+ | Terms & conditions apply.
- ✓ 200 Bonus Spins
- ✓ 15% Weekly Cashback
- ✓ 100% Deposit Bonus
18+ | Terms & conditions apply.
- ✓ Available on 5 slots
- ✓ Bonus code: GOLD100
- ✓ 100% up to €500
18+. New players only. NDB: 100 Free Spins on Royal Joker: Hold and Win (Playson), Big Bass Bonanza (Pragmatic Play), Book of Demi Gods 2 (Spinomenal), Starburst (NetEnt) or Gold Rush with Johnny Cash (BGaming), CODE: GOLD100, 35x wagering requirement, max bet €5 (or currency equivalent), max win €50 (or currency equivalent). Email and phone verification required. First Deposit Bonus: 100% up to €500 + 50 Bonus Spins (or currency equivalent). Terms apply.
The best 400% online casino bonuses in one place
You have come to the right place if you are looking for the best casino with a 400% bonus. Our goal is to highlight value from safe and trustworthy casinos. Below you will find the top online casinos with a 400% match on a qualifying first deposit, curated for Irish players. Our team tests sign-up flows, verifies licence details, reads recent player feedback, and stress-tests terms such as wagering, maximum bet, and cash out limits so you can compare quickly and confidently.
Expect a focus on bonuses that are not just big on paper but usable in practice. That means clear rules, acceptable rollover, game libraries with strong slot coverage, and support for euro payments widely used in Ireland, including debit cards, bank transfers, and mainstream e-wallets.
400% Casino Deposit Bonuses Explained
A 400% casino deposit bonus is a match on your qualifying deposit. Most offers are reserved for newly registered players, sometimes as the first stage of a broader welcome package. Once you create an account and opt in, the casino credits four times your deposit as bonus funds. Combined with your deposit, you start with a total balance equal to five times what you put in.
Here is a straightforward example rooted in real play. Deposit €20, receive €80 in bonus funds for a total of €100 playable balance. Your cash and bonus balances usually sit side by side, with bonus funds locked behind wagering rules until cleared. Some welcome packages require you to claim each stage in order, each with its own minimum deposit, eligible games, and time limit.
A few Irish-friendly sites also run 400% reload bonuses for existing players. These are rare, time-limited, and typically tied to specific games or days. Whether first deposit or reload, always check if an opt-in button or promo code is required, the minimum deposit, the maximum bonus amount, and whether any payment methods are excluded.
How to keep winnings from 400% casino deposit bonuses
Your ability to withdraw winnings from a 400% bonus depends on meeting the wagering requirement within the time window. Wagering, also called rollover or playthrough, states how much real-money betting you must complete before the bonus converts to withdrawable cash. Most casinos set wagering at 35x to 45x on the bonus amount for large matches, but 400% offers can climb to 60x or even 80x, reflecting the extra bonus value.
Here is a quick example to set expectations. If you receive €80 in bonus funds with a 40x wagering requirement on the bonus, you must wager €3,200 before you can cash out bonus-derived winnings. If the term is on bonus plus deposit, the target will be higher. Game weighting matters too. Slots often contribute 100%, while table games, live dealer titles, and some high RTP or low volatility slots may contribute less or be excluded entirely. Track your progress in the bonus meter and, if you reckon you will not make the deadline, there is no harm in stopping early.
📙 Erik King’s Quick Tip
Take screenshots of the promo page, the stated wagering, max bet, and bonus expiry the moment you opt in. If anything changes or looks unclear later, you will have a clear record for customer support to honour the original terms. Never try to bypass wagering or use multiple accounts, as that can lead to confiscation of funds.
400% Casino Deposit Bonuses: Limits and Restrictions
Large matches come with strict limits designed to protect both players and casinos. Expect a maximum bonus cap that defines the most extra funds you can receive. Many operators also set a maximum cash out from bonus play for very high matches, plus a maximum bet per spin or game round while wagering, commonly €3 or €5. If you exceed the max bet or play restricted games, winnings linked to the bonus can be voided.
Time limits are another key factor. Deadlines typically range from 7 to 30 days, with shorter windows on especially generous offers. It is common for some payment methods, such as Skrill or Neteller, to be excluded from bonus eligibility. Progressive jackpots are almost always excluded, and live dealer or table games tend to contribute at reduced rates or not at all. Make sure to read the irregular play policy, which may ban low-risk patterns like equal covering bets, minimal-risk strategy abuse, or spinning at very low stakes until a feature triggers.
Recommended online casinos
Apart from the list provided above, there are other exceptional online casinos with standard-sized welcome packages that deliver strong overall value. These sites often trade a smaller headline match for better fundamentals, such as lower wagering, faster KYC and payouts, excellent mobile performance, and more transparent bonus rules. Irish players who prioritise reliability, local payment options, and responsive support may prefer these balanced choices.
Expect modern lobbies with a broad slot line-up, live casino tables, and regular network promotions. When you want a consistent daily experience rather than a one-off mega match, these recommended operators tend to shine.
Safety first
For a casino to be considered among the best 400% bonus offers, it must be trustworthy and well reviewed by players. It is our policy to protect the safety of our visitors and our brand, which means listing licensed operators, checking that RNGs are certified, and reviewing the bonus terms for fairness. Look for recognised licensing such as MGA or comparable oversight, evidence of independent testing, and strong encryption for payments and identity verification. Keep an eye on developments with the Gambling Regulation Authority of Ireland, which is raising the bar for consumer protection.
A rogue casino is often revealed by its promo terms. Warning signs include impossible wagering, tiny max cash outs on large bonuses, unclear or shifting rules, or slow pay tactics once you request a withdrawal. Fair casinos publish attainable wagering within a reasonable timeframe, process KYC efficiently, and pay winnings in full rather than in excessive increments. Always use in-account tools like deposit limits, reality checks, time-outs, and self-exclusion if needed. If gambling stops being fun, support is available from the HSE and Problem Gambling Ireland.
Casino bonuses in general
Every online casino player appreciates a chance to claim a bonus in the form of funds, free spins, or both. Bonuses let you try games without risking your full cash balance, which is especially helpful if you are new to online casino gaming. Variants include deposit matches, no deposit offers, free spins, cashback, and on rare occasions wager-free bonuses with no rollover on winnings.
Most of the 400% bonus offers highlighted here are available through this platform via the links provided. Always read each offer’s terms to learn how free spins are credited, which slots are eligible, and whether winnings from free spins carry separate wagering.
Why Zamsino.com?
To build trust with our online casino players, we only list licensed and accredited casinos. As stated above, only operators that pass a strict testing process appear on our lists. We review bonus value against the small print, verify payment speeds with small and larger test withdrawals, and monitor player sentiment so outdated or underperforming brands are rotated out.
Unlike many competitors, we take responsibility for the operators we promote. If you encounter a terms discrepancy or payout issue with a listed site, reach out and we will help escalate with the casino to get it sorted.
📙 Erik King’s Quick Tip
Use Zamsino links to access negotiated deals, then confirm the casino’s promo page matches what you claimed. If any rule, such as max bet or cash out cap, is unclear, ask live chat to confirm and save the transcript alongside screenshots.
400% Casino Bonus: Advantages?
If you are on a budget, a 400% casino bonus can multiply your bankroll and extend your sessions. With five times more playable balance than your deposit, you can test more slots, withstand downswings, and explore new titles without committing large cash upfront. High matches also let you sample different volatility profiles, from steady low-variance games to high-volatility slots with feature-driven payouts.
The main benefit is flexibility. A larger starting balance can support structured wagering through your favourite games while you learn paytables, features, and optimal stake sizes that fit your style.
400% casino bonus: Downsides?
The trade-off for a huge match is heavier wagering and tighter rules. Higher rollover means more spins are needed to clear the bonus, which increases exposure to variance and time limits. Some offers add a maximum cash out on bonus winnings or restrict betting patterns that could be interpreted as low risk.
If you prefer quick withdrawals or primarily play table games or live dealer titles, a smaller match with lighter wagering often yields better real-world value. High rollers should review max bet limits and contribution rules carefully, since big stakes are usually capped during wagering.
What to keep in mind when claiming a large casino bonus
Most large bonuses require you to meet wagering before withdrawing. Check the expiry date, minimum deposit, eligible payment methods, and whether wagering applies to bonus only or bonus plus deposit. Review game contribution rates and any excluded titles, along with maximum bet per spin and any maximum cash out rules tied to the bonus.
A short decision guide can help. If you mainly play slots and can commit enough spins within the deadline, a 400% match can be worth it. If you prefer live tables or want fast access to withdrawals, choose a smaller match with lower rollover instead. Whichever you pick, verify your account and payment method early so KYC does not delay your cash out once wagering is complete. Having your photo ID and a recent utility bill with your Eircode to hand will speed things up.
Best 400% casino bonus sites
All online casinos listed on our platform are top quality with excellent gaming experiences. Even within that list, a few operators stand out for combining a sizable 400% match with acceptable wagering, clear contribution rules, and fast payouts. Some are player favourites thanks to regular free spin drops, daily jackpots, and attentive Irish support, while others win on simple, transparent terms that are easy to complete.
Use the main list above to compare headline value, then read the terms page at each casino for the details that affect you most. Match the offer to your budget, preferred games, and timeframe to get the best result from a 400% bonus.
Related articles
- Play for free when you claim €50 free no deposit!
- Find yourself a new online casino to play with our list!
- Check out our article and find some 100 free spins no deposit bonuses!
Erik King
Editor in Chief - Zamsino.com
I always loved gambling and probably always will, spending my time reviewing gambling sites to help people save time.
GRAI | Gamblers Anonymous Ireland | Extern Problem Gambling | GambleAware | GamblingCare | IACP | Aware
400% Welcome Bonuses in Ireland
| Lucky Days Casino | 🍀 Get a 400% bonus up to €800 + 40 Free Spins |
| ArcaneBet Casino | 🔮 400% deposit match across your first four payments |
| CryptoLeo Casino | 💎 Claim a 400% starter pack up to €1,000 |
| Rolling Slots Casino | 🎸 400% welcome offer up to €600 + reload rewards |
| Gate777 Casino | ✈️ Enjoy a 400% match up to €700 + 75 Free Spins |
| Boomerang Casino | 🎯 Grab a 400% first-deposit deal up to €500 |
| Mr Green Casino | 🎉 Deposit €100, play with €500 (400% match) |
| Lucky Hunter Casino | 🏹 Get a 400% bonus on selected slots |
| NovaJackpot Casino | 💫 400% boost + €10 cashback credit |
| Tsars Casino | 👑 400% welcome package up to €1,200 total |