Highest Paying Online Casino May 2025

We’ll explain the difference between RTP and volatility as both of these are generally listed when you access each casino game, so it’s good to know the difference. It’s worth returning to this page on a regular basis as we frequently update our online casino list with details of some of the latest games available.

Top Paying Online Casino​ Sites

Ultimately, we’re looking for the casinos with highest slot payouts, and those that have other games with a high RTP. When you sign up with a casino through Bookies.com, you have full access to all the available games, and you'll be able to identify the RTP available. This is a percentage, and we want this to be as close to 100% as possible when looking for the highest payout casino games.

It stands to reason that readers should sign up with the highest payout casino but there can be reasons to play a game with a lower RTP, even if it's simply because you enjoy it. However, it’s always nice to have the option where the Return to Player percentage is upwards of 98% as it means that when you spin the reels or play a table game, you always know there’s a reasonable chance of getting a return.

The highest payout online casino will have several online slots games that meet the high RTP percentage that readers want. This should be the same when you play roulette or blackjack. There might even be 99% RTP which really goes close to eliminating house edge, and sometimes you can find no commission games, which means Return to Player is 100%.

It’s fair to say software providers are now competing to create high RTP games as there’s clearly a demand to play slots where there’s a high average payout. Some providers have a reputation for ensuring their games have a high Return to Player value, making them more appealing in this aspect.

What Is RTP?

The best paying casino games have a high RTP, whether it’s a slot or table game. This stands for Return to Player and is expressed as a percentage, showing how much a player should theoretically get back from their total stakes on a long-term basis. As such, this doesn’t guarantee how much you will win or lose each time.

However, it does indicate how much house margin is built into the game; each game is independently tested to ensure the RTP is accurate.

Best Payout Casino Sites

We have found some of the best online casinos that payout. The good news is that Irish customers can sign up in minutes, with only a few basic details required in order to register an account. There’s nearly always the chance to claim a sign up offer, too, which is usually a combination of a deposit bonus and free spins. We have created a table below to outline the casinos with highest slot payouts.

PlayFina

For many Irish customers, PlayFina is the best online casino fast payout option around. You can claim bonuses up to €3,500 and 1,000 bonus spins on sign up. PlayFina is a casino with some of the highest RTP casino slot machines including Blood Suckers, and there are lots of other hot games including Sugar Rush 1000, Big Wild Buffalo and Beam Boys. Enjoy Bonus Buy titles, and there are several blackjack options where you can enjoy an RTP of 99%.

TonyBet

There’s a nice straightforward welcome bonus at the TonyBet Casino of a 100% deposit bonus up to €750, with 100 free spins also on the table. We love the Book of Billionaire collection of slots including Olympus Coin Link, Lucky Bacon and Titan Power Wild, and there are also lots of Crash games including Plinko 2 Multiplier Madness. You can enjoy several of the best paying casino games here, such as Book of Pyramids, which boasts over 97% RTP.

Fire Vegas

If you’re looking for the best payout casino in Ireland, Fire Vegas comes near the top of the pile. You’re able to secure a 100% welcome bonus up to €200 and also bank 25 bonus spins as part of the package. Rich Wilde and the Book of Dead is a good starting point with a 96.2% RTP, while players can also enjoy blackjack options where you can get 99% for some games. Fire Vegas is a licensed operator that is authorised by the Malta Gaming Authority.

Spinaro

Spinaro has high RTP slot games such as Legacy of Doom, with a generous 100% welcome package up to €1,000 and 50 free spins available at this best payout online casino. This is a colourful gaming brand where Irish players can choose from Bonus Buy, Drops & Wins and Megaways, and take advantage of the Monday Money Boost and Quick Cash Tournament promotions at this fast withdrawal casino.

888 Casino

888 Casino is regarded as one of the best highest paying online casino sites by many as it is a famous brand that has been around for decades. Irish customers can land the 888 Casino bonus up to €200 and immediately dive into games from a range of software providers. This includes exclusive slots such as Holy Mackerel Tidal Treasures, Gorilla Giant Spin and Crowns & Sizzles. We also recommend playing at the live casino where there are 888-branded roulette and blackjack tables.

Lucky10

A 100% welcome bonus up to €500 can be claimed at Lucky10, which is the highest payout casino for table games such as roulette. Many of the slot games also have an RTP upward of 95% including the popular Book of Dead. The loyalty program, Lucky Levels, gives regular players plenty of rewards, and there are games a wide range of software providers. Pragmatic Play's Candy Blitz Bombs and Gates of Olympus are good starting points.

MyEmpire

MyEmpire is rated in Ireland as among the top casinos with highest slot payouts, and the unique welcome package of €800 along with 300 free spins is available across your first four deposits. There are some exclusive games available, with Joker Cashpot, Gates of Hades, and Cash of Gods worth checking out. There are also live casino games where there’s a high RTP available, with Gravity Roulette one of the new games that has just dropped and among those where the house margin is minimal.

Zip Casino

Zip Casino has thousands of games to choose from, and you can tell from the RTP that it is one of the best paying casinos. Enjoy a 100% welcome bonus up to €1,000 when you sign up and get 50 free spins as part of the package. There are some fantastic live dealer games that have a Return to Player value as high as 99%. We also love the wide range of payment options for Irish customers.

Barz

Barz has some of the best paying online casino games including Blood Suckers. This has an RTP of 98%, and there are lots of other online slots with a similar Return to Player percentage. Irish players can get started with a welcome package of a 100% welcome bonus up to €500 along with 50 free spins. This is a rock 'n' roll-themed casino, and there’s a Mega Cash Giveaway with new games dropping all the time. It’s easy to find out information relating to each slot title and the volatility level.

Lottoland

New players can get up to 200 free casino spins at Lottoland which is a great way for Irish customers to get started. What also makes this a top paying online casino is the high volume of RTP games. There are new slot games added regularly, including Fuel The Mule, Fiesta Fortune and Olympus Lightning. This is also a great casino for betting on different state lotteries, and they cover draws taking place all over the world.

How to Find Casinos With Highest Slot Payouts​

Here at Bookies.com, we’re committed to showcasing each highest paying online casino. There’s nothing to stop you signing up with more than one casino, which enables you to compare the game range and discover the highest RTP slot titles that exist. You are also able to claim a welcome bonus at each casino, and we recommend doing this one at a time to ensure you meet the key terms and conditions.

We regularly update this page to reflect the latest offers available at the casino sites we recommend in Ireland. Sometimes we’ll even have an exclusive promotion for readers. We’re also looking out for new operators that are open to Irish customers, so it’s beneficial to return to this page to stay abreast of the best online casino offers around.

How To Choose Best Online Casinos That Payout

We know it’s important to find an operator with the best paying casino games, but this is just one of many elements that makes a good casino. There are a number of other factors we consider in our casino reviews, and they’re covered below.

It’s usually the case that the best paying casinos will have quality promotions available, and they should also provide a user-friendly experience, including solid customer service. A wide range of banking methods is also appreciated by Irish players to make it as simple as possible to fund your account at a €10 deposit casino.

Welcome Offer

A top paying online casino should always provide some kind of welcome offer, and it’s often the case that a new customer can land a deposit bonus. The percentage of bonus can differ across casinos, although it's usually 100% and also depends on the amount of your first real money deposit. If you need to use casino promo codes to access the bonus, we'll always list them so you don't miss out.

Sometimes there are bonuses available on several of your opening deposits. You can also sometimes collect bonus spins as part of the welcome package or even free chips for the live casino. We’re looking for a generous sign up offer that doesn’t have too many strict terms and ideally has low wagering requirements.

Existing Customer Offers

As well as a sign up offer, casinos should also help players to benefit from ongoing promotions. The casinos with highest slot payouts might allow players to land a reload bonus, which is a bonus on top of a deposit, cashback on losses as an existing player, or even a no deposit bonus casino offer.

These bonus winnings go into a separate pot from your regular cash. Watch out for free spins no deposit bonuses to get some extra value without having to fund your account.

Customer Service

It’s great to enjoy the best paying online casino games, but it's important to have the reassurance of good customer service. A support representative should be able to provide key information about the highest RTP slot machines, and ideally this should be a 24/7 service.

This should include live chat, email and phone. It’s also good to see additional information housed in the Frequently Asked Questions section along with data relating to game RTPs at real money online casino sites.

Range of Casino Games

Finding the best paying online casino slots is often the name of the game. It naturally stands to reason that if an operator provides a wide range of titles, there will be lots of games with a high RTP.

The highest paying online casino is effectively the one that has games approaching a 100% Return to Player value, so we always want to see an operator working in tandem with a wide range of software providers in the interest of choice.

Easy to Use Desktop Site

If you're playing casino games through a desktop site, you want the experience to be user-friendly. This should start as soon as you sign up and register an account and continue throughout, including when you deposit and withdraw. A best payout casino will ensure it’s easy to find the games you want to play, and if they provide a rundown of every game and the corresponding RTP, it is an enormous benefit.

Mobile Casino App

A highest paying online casino should definitely have a mobile app that is downloadable in seconds on both iOS and Android. You should also be able to choose from the same range of games in online casino apps compared to desktop and mobile sites. One of the big perks is that you can receive offer notifications through a mobile app to ensure you don't miss out, and it’s great to see the casino apps regularly updated to ensure an improved experience.

Licensed Operator

The best online casinos that payout always have to be licensed, and we will only recommend operators to Irish readers if we can see evidence of regulation. This ensures customers are always guaranteed a safe and secure experience.

It also means the best paying online casino slots have been independently tested by an auditor. Having a license means an operator is complying with the regulations and will therefore get the Bookies.com seal of approval.

Banking Methods

It’s important for customers to find a suitable payment method, as this can enable fast deposits and almost instant withdrawals, depending on the method used. The highest paying online casino will provide a range of options, including bank card, bank transfer, and e-wallet including PayPal casinos and casinos with Skrill deposit.

It’s also common to find Apple Pay and Google Pay accepted, along with PaysafeCard casinos, and crypto casinos allowing deposits with the likes of Bitcoin and Litecoin. Be sure that the method you’re using qualifies you for a welcome bonus – not all of them are eligible for a welcome offer but can then be used later on if you wish.

Highest RTP Casino Slot Machines​

In this table you can find the best payout casino for some of the highest RTP games. These games are a great starting point and will give you the best long-term chance of getting a return, but there’s still a margin built into each title.

Nevertheless, it’s great to enjoy these selected slot games knowing the RTP casino payout percentage is so high. It really limits the house edge, and these games are all really fun to play too. Ensure you understand how the game works each time before playing it.

Volatility At Best Paying Casino Games

You will generally find the highest payout casino will have games that differ in terms of volatility, which will almost always be listed as high, medium or low in the description. This is not to be confused with RTP and actually refers to the frequency of how often a customer might expect to win. This information is useful to understand and will manage your expectations when you play a particular slot game.

A high volatility game means that winnings will be more sporadic but you should expect to receive larger amounts on average as you continue to play. Therefore, the RTP is always correct even if you might have to wait longer intervals for a return. Many online slot games fall into the medium volatility bracket and that means that payouts should be expected at regular intervals at top online casinos.

Conversely, a low volatility slot game will mean a top paying online casino pays out smaller amounts with higher frequency. On average, you don’t have to wait as long to receive a payout so it's ideal if you want the reassurance of a more likely win every time you spin. We always recommend starting off with a low volatility game for small stakes so you can dip your toe in the water.

• High volatility: expect dramatic swings and a low payout frequency. However, you will get paid larger returns when they come.
• Medium volatility: expect relatively regular online casino payouts that come in modest amounts. Most online casino slots fall into this category.
• Low volatility: expect regular payouts but generally in smaller amounts. This might mean you are often winning your stake back, or even less, rather than generating a big profit.

Highest Payout Casino Games​

An operator can be the highest paying online casino in lots of ways as it all comes down to the game range that is available and the corresponding RTPs. Naturally, the bigger the volume of games means the greater chance that some of them will have a limited house edge.

In this section, we break down the casino games into different categories to help you understand how to make the most from your casino play and access the high RTP titles.

Slots

The Ugga Bugga slot game is going down a storm with Irish customers, partly because the RTP is between 98.74% and 99.07%. It’s also low volatility, making it the best payout casino game right now. Generally speaking, slots can vary quite a lot when it comes to Return to Player value and some might be as low as 90%, although they could be linked to a progressive jackpot, which is clearly worth winning. The majority hover somewhere around the 95% mark.

Roulette

Irish customers regularly enjoy the chance to play roulette as it's one of the best paying casino games, especially if you play European roulette online. You will find that the RTP is around 97.3%, with the single zero being the main reason why there’s a house edge. Should you play American Roulette, you will find Return to Player value closer to 95%. There can be other roulette games to enjoy and the RTP will vary according to the type of bet that you place each time.

Blackjack

Blackjack is among the best paying online casino games once you understand how it works. Sometimes the RTP can be as high as 99%, and it’s also a low volatility card game, which means the dealer is regularly beaten, although it always helps to know what decisions to make.

This is not only based on the cards you have but also what hand the dealer holds. Sometimes you can place side bets on certain live blackjack games, which considerably lowers the Return to Player value.

Baccarat

Baccarat is another popular table game that can be found at a live casino. Depending on what bet you make, live dealer baccarat is one of the highest paying casino games. A title such as Speed Baccarat can give you an RTP of nearly 99%, and, like blackjack, it’s a low volatility game, which means regular payouts against the dealer. Mega Baccarat can also come in at 98.79%, with side bets meaning that the Return to Player value drops considerably with a greater potential reward.

Are The Highest Payout Casino Sites Legal?

At Bookies.com, we will only promote online casinos that are licensed. This means they have been given state approval from a reputable governing body. Being subject to regulation means that customers can ensure a safe online casino experience, and a highest payout online casino will also have been independently tested to ensure the RTPs are correct.

Therefore, it’s legal to go ahead and sign up with any online casino on this page. Many casinos show licensing information near the foot of the homepage, and this outlines where they are licensed, and if we recommend them then it will always be a reputable gaming authority.