Latest Casino Bonuses for September 2025

Karamba

Bonus up to €500 plus 50 Free Spins · Let's go Karamba!

Welcome offer:

100% Bonus up to

€500

+ 50 Free Spins

Bonus on first deposit

Special First Deposit Bonus for Players from Ireland · Terms & Conditions apply  · #Ad ·  Gambling can be addictive. Play responsibly · GambleAware.org 

Karamba

Bonus up to €500 plus 50 Free Spins · Let's go Karamba!

September 14

  • 100% Bonus up to €500 + 50 Free Spins with your first deposit (New customers)
  • Irish players are accepted
  • Exclusive bonuses for Irish Players
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Karamba
  • Online sports betting
  • Karamba is available in English
  • Tested and certified by Casino Bonus Center · Rating: 3.9/5
  • 88 Game Providers: Spribe, Barstruck, Thunderkick, Crazy Tooth, Reel Time Gaming, Switch Studios, Big Time Gaming, Aurum, SpinPlay Games, 4ThePlayer, High Limit Studio, Neon Valley, and others.

Hopa

Get 50 Free Spins plus a €500 Bonus to start your Journey!

Welcome offer:

100% Bonus up to

€500

+ 50 Free Spins

Bonus on first deposit

Exclusive Welcome Bonus for Irish players making their first deposit · Terms & Conditions apply  · #Ad ·  Gambling can be addictive. Play responsibly · GambleAware.org 

Hopa

Get 50 Free Spins plus a €500 Bonus to start your Journey!

September 13

  • 100% Bonus up to €500 + 50 Free Spins with your first deposit (New customers)
  • Irish players are accepted
  • Exclusive bonuses for Irish Players
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Hopa
  • Online sports betting
  • Hopa is available in English
  • Tested and certified by Casino Bonus Center · Rating: 3.9/5
  • 88 Game Providers: Bang Bang Games, SpinPlay Games, Pragmatic Play, Eyecon, Reel Time Gaming, Barstruck, SlingShot, Shuffle Master, InOut Games, Coin Machine Gaming, Big Time Gaming, Oryx Gaming, and others.

PlayOJO

Unlock 50 Free Spins Today – All Paid in Cash with No Wagering Requirements

Welcome offer:

50

Free Spins

Bonus on first deposit

Significant Terms: 18+ · First deposit only · Min. deposit €10 · 50 Free Spins on Big Bass Bonanza slot · Each free spin valued at €0.10 · Irregular play may lead to removal of rewards · OJO’s Rewards and Game Play policy applies · Terms & Conditions apply · #Ad ·  Gambling can be addictive. Play responsibly · GambleAware.org 

PlayOJO

Unlock 50 Free Spins Today – All Paid in Cash with No Wagering Requirements

September 12

  • 50 Free Spins with your first deposit (New customers)
  • Irish players are accepted
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at PlayOJO
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.1/5
  • Popularity: This offer has been claimed by 30 visitors so far this month.
  • 26 Game Providers: Merkur Gaming, NetEnt, Yggdrasil Gaming, Play n GO, NextGen Gaming, Amaya Cryptologic, Blueprint Gaming, Williams Interactive, GVG Green Valley Games, ELK Studios, Slingo Originals, IGT Interactive, and others.

AmunRa

Step Into Egypt’s Riches with Custom Welcome Bonuses, Free Spins, and Sports Offers

Welcome offer:

100% Bonus up to

€500

+ 200 Free Spins

Bonus on first deposit

Terms & Conditions apply · #Ad ·  Gambling can be addictive. Play responsibly · GambleAware.org 

AmunRa

Step Into Egypt’s Riches with Custom Welcome Bonuses, Free Spins, and Sports Offers

September 11

  • 100% Bonus up to €500 + 200 Free Spins with your first deposit (New customers)
  • Irish players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at AmunRa
  • Online sports betting
  • Available in multiple languages, including English
  • Rating: 3.9/5
  • 89 Game Providers: Yggdrasil Gaming, Gamebeat, Spinomenal, Booongo, Aviator, Game Time Tec, Penguin King, 7777 Gaming, Booming Games, OnAir Entertainment, ICONIC21, Popiplay, and others.

Posido

Explore Thousands of Games, Claim Your Treasure Chest Bonus, and Bet on Sports

Welcome offer:

100% Bonus up to

€500

+ 200 Free Spins

Bonus on first deposit

Terms & Conditions apply · #Ad ·  Gambling can be addictive. Play responsibly · GambleAware.org 

Posido

Explore Thousands of Games, Claim Your Treasure Chest Bonus, and Bet on Sports

September 11

  • 100% Bonus up to €500 + 200 Free Spins with your first deposit (New customers)
  • Irish players are accepted
  • Accepts Bitcoin and other cryptocurrencies
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Posido
  • Online sports betting
  • Available in multiple languages, including English
  • Rating: 3.8/5
  • 89 Game Providers: Spribe, Oryx Gaming, Amigo, Pragmatic Play, Playson, Blueprint Gaming, Leander Games, QuickSpin, Penguin King, EGT Digital, Felix Gaming, VoltEnt, and others.

EnergyCasino

Energize your game with 30 Free Spins and a Triple-Powered Welcome Bonus

Sign-up Bonus:

30

Free Spins

No deposit required

Significant terms: 18+. 30 Free spins (Spins value: €0.20) on Gates of EnergyCasino slot machine available once, to new customers who register at EnergyCasino using the promotional link. Maximum winnings €100. Spins expire after 7 days. · Terms & Conditions apply  · #Ad ·  Gambling can be addictive. Play responsibly · GambleAware.org 

EnergyCasino

Energize your game with 30 Free Spins and a Triple-Powered Welcome Bonus

September 8

  • 30 Free Spins · No deposit required
  • Exclusive No-Deposit Bonus – Available in Ireland and Selected Countries only!
  • 100% Bonus up to €200 + 400 Free Spins with your first deposit (New customers)
  • EnergyCasino offers exclusive bonuses for CasinoBonusCenter visitors
  • Irish players are accepted
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at EnergyCasino
  • Over €14,797,187 in Jackpots by Games Global
  • Available in multiple languages, including English
  • Tested and certified by Casino Bonus Center · Rating: 4.4/5
  • Popularity: This offer has been claimed by 179 visitors so far this month.
  • 62 Game Providers: Merkur Gaming, RAW iGaming, Leander Games, Playzido, Spribe, Hölle Games, Red Tiger, Thunderkick, G Games, Skywind, Just for the Win, Gamomat, and others.

Whamoo

Fun, Good Vibes, and Made-to-Measure Welcome Bonus Combo

Welcome offer:

100% Bonus up to

€300

Bonus on first deposit

Terms & Conditions apply · #Ad ·  Gambling can be addictive. Play responsibly · GambleAware.org 

Whamoo

Fun, Good Vibes, and Made-to-Measure Welcome Bonus Combo

September 6

  • 100% Bonus up to €300 with your first deposit (New customers)
  • Bonus available on your second and third deposit
  • Irish players are accepted
  • Play instantly in your browser – No installation required
  • Mobile-friendly games · Enjoy playing on smartphones and tablets
  • Live Casino · Play against real croupiers at Whamoo
  • Whamoo is available in 3 languages: German, English, and Spanish
  • Rating: 3.6/5
  • 51 Game Providers: NetGame, Playtech, Skywind, Revolver Gaming, Playson, Yggdrasil Gaming, Gamomat, Golden Hero, Booming Games, Reevo, Kalamba Games, Atomic Slot Lab, and others.

Top 10 Online Casino Bonuses in Ireland (September 2025)

Expert-Rated Real Money Casinos with Top Bonuses

Looking for the best online casinos in Ireland? Our expert team has tested and reviewed hundreds of real money gambling sites to bring you the top 10 choices for September 2025. LeoVegas, Zodiac Casino, and EnergyCasino lead our rankings, standing out for their extensive selection of high-paying slots, immersive live dealer tables, exclusive bonuses, and lightning-fast payouts.

Browse our expert-ranked list below and claim your exclusive welcome bonuses today!

Online Casinos IrelandWelcome Bonus

Up to €1,000 + 200 free spins!

Bonus of 100% up to €1,000 + 200 Free Spins

80 chances to be a millionaire for €1

80 Free Spins

Triple-Powered Welcome Bonus

Bonus of 100% up to €200 + 400 Free Spins

Sportsbook · Casino · Awesome bonuses

Bonus of 100% up to €500 + 100 Free Spins

Bonus up to €3,500 + 1,000 Free Spins

Bonus of 100% up to €500 + 200 Free Spins

€3,625 in Bonuses + 350 Free Spins

Bonus of 200% up to €500 + 100 Free Spins

Unleash the Joker's fun!

Bonus of 225% up to €1,000 + 200 Free Spins

Get a 200% Bonus up to £200

Bonus of 200% up to £200

€200 bonus + 10 free spins on Vegas

Bonus of 100% up to €200 + 10 Free Spins

Sportsbook, casino, live casino

Bonus of 100% up to €100 + 50 Free Spins

* Terms & Conditions Apply · #Ad ·  Gambling can be addictive. Play responsibly · GambleAware.org 

With nearly two decades of experience in the industry, CasinoBonusCenter.com has been analyzing and comparing online casinos since 2006. Our dedicated team of professionals has handpicked the most trusted casinos for Irish players to ensure you get the biggest sign-up bonuses, top-tier games, and the most rewarding loyalty programs.