Before deciding to play a slot game online, most players will want to know which online slots payout the most? There are thousands of titles available online, all with varying RTP values, but which pays out the best?
Let us ask you a question – what’s the most exciting game in a casino? Sure, roulette, poker, blackjack, and lightning roulette all sound great. However, another type of game offers unmatched thrills – online slots. The best casino slots offer a variety of ways to win and feature prizes beyond your imagination.
Since their move to the online space, slots have become even more popular. That’s all because of the gamification and diversity of themes that have made them even better than before. Additionally, the slot RTP has gone up in modern slot games, meaning they’ve been made even more thrilling and rewarding than before.
The best RTP slots in 2023 pay well over the industry-standard 96%. If you know nothing about RTP play and how to choose the highest-paying slots, this guide can help. We have also hunted down 12 of the best RTP online slots, which you can play online, or on your mobile.
Top Slot Machines with the Highest RTP
Without further ado, we’ll present the highest payout online slot machines you can find in the top online casinos in 2023.
- Ugga Bugga – Playtech – RTP: 99.07%
- Book of 99 – Relax Gaming – RTP: 99%
- Mega Joker – NetEnt – RTP: 99%
- Zeus Lightning Power Reels – Red Tiger Gaming – RTP: 97.73%
- Ooh Aah Dracula – Barcrest – RTP: 99%
- Jackpot 6000 – NetEnt – RTP: 98.9%
- The Catfather – Pragmatic Play – RTP: 98.1%
- Blood Suckers – NetEnt – RTP: 98%
- Jokerizer – Yggdrasil Gaming – RTP: 98%
- 1429 Uncharted Seas – Thunderkick – RTP: 98.60%
- Rainbow Riches – Barcrest – RTP: 98%
- Starmania – NextGen – RTP: 97.87%
- White Rabbit Megaways – Big Time Gaming – RTP: 97.72%
#1 Ugga Bugga – Playtech – RTP: 99.07%
Ugga Bugga is not your typical online slot. It’s more like a video poker game, but regardless of its form, it’s known as the highest payout online slot in the industry. Released by industry giant Playtech in 2006, it’s obviously a low-variance affair with 10 reels. It has a hold reel option like video poker games do and a respin feature borrowed from top online slots.
The RTP of this slot is a massive 99.07%, putting it at the throne of the highest paying slot machines. It might not be the most fun slot to play, but the return to player percentage can’t be faulted!
#2 Book of 99 – Relax Gaming – RTP: 99%
Book of 99 by Relax Gaming is the latest slot with a sky-high RTP to hit the market. Released in early 2021, it’s a cartoon-themed slot game that pays homage to ancient Greece. A bit surprisingly, it’s a volatile title, unlike the others on this list. However, the fact that the stakes are higher also means that you have a shot at higher cash rewards.
The 10-payline slot can deliver wins over 12,000x your bet if you hit the right symbols. With bets ranging from $0.1 to $100 per spin, that means sky-high rewards in the bonus round. The main bonus round uses the popular “Book” style expanding symbols made famous by Book of Ra Deluxe (Novomatic) and the Book of Dead slot from Play’n GO.
#3 Mega Joker – NetEnt – RTP: 99%
With an RTP of a clean and exact 99%, Mega Joker is one of the best casino slots ever developed by NetEnt. Unlike Ugga Bugga, this is as vintage a slot as they come. It’s a classic Joker-style slot that’s the favorite of many players and pays up to 2,000x your stake if you’re lucky.
There’s a catch, though. The 99% RTP is for the Supermeter bonus game. Getting to it isn’t easy, but once you do, you’ll get a better return to player than on any other slot.
#4 Zeus Lightning Power Reels – Red Tiger Gaming – RTP: 97.73%
Zeus Lightning Power Reels may not be the slot with the highest RTP on this list, but it surely is among the most exciting ones. Apart from the 97.73% return to player percentage and the high volatility, it also features 30 both way paylines and Red Tiger’s own Power Reels mechanic.
This special engine pays massive wins if you manage to fill the screen with wilds. Keep a lookout for the large Zeus 1×3 super symbol; this is where the main action comes from. The maximum you can hit is just over 5,000x your bet, which is more than enough to appeal to all slot players.
#5 Ooh Aah Dracula – Barcrest – RTP: 99%
Barcrest is a top slot machine developer – it has been so for quite some time. The legendary studio is behind some of the biggest industry classics and top slot machine games. One of them is undoubtedly the Ooh Aah Dracula slot with an RTP of 99% and the Big Bet feature.
The maximum RTP comes into play when you activate the High Roller mode, so make sure not to miss it. In the base game, the RTP goes up to 96%, which is still decent for a 10-paylines slot with medium volatility, but the big bet mode and gamble features are where this slot truly shines. The tongue-in-cheek vampire design and funny horror elements make Ooh Aah Dracula a truly unique slot.
#6 Jackpot 6000 – NetEnt – RTP: 98.9%
Yet another joker-style slot game by NetEnt, Jackpot 6000 is another vintage slot machine with a sky-high RTP. It stands at 98.9%, which is agonizingly close to Ugga Bugga. Play at the max coins to get to the Supermeter bonus, and you’ll get fantastic payouts which is why Jackpot 6000 is one of the top 10 slot machines on this list and many others. Make sure you read through the paytable and instructions before playing, as this slot requires some optimal strategy to reap the best returns.
#7 The Catfather – Pragmatic Play – RTP: 98.1%
A unique blend of cats and the legendary movie The Godfather, the Catfather is one of the highest payout slot machines in Pragmatic Play’s portfolio. Its RTP varies between 94.96% and 98.10% in this pay-both-ways slot that can pay great sums of cash. Special features include the Wild Night, which is a random expanded wild feature that can cover multiple reels. Get to the free spins round, and that’s where things turn cute and meowy. It’s a purrfect slot that you don’t want to miss if you’re a fan of cats.
#8 Blood Suckers – NetEnt – RTP: 98%
One of the premier vampire-themed slots of all time, NetEnt’s Blood Suckers slot is also known for its sky-high RTP. It stands at 98% and is expectedly low variance with 25 paylines in play and very regular bonus feature triggers. The maximum you can win is up to 900x your stake, which isn’t exactly the biggest winning potential we’ve seen, but it’s more than enough to put it among the best RTP slots in 2023. If you want a touch more variance and volatility in your slot play, then Blood Suckers II, the sequel, offers this along with improved visuals, but a slightly lower RTP.
#9 Jokerizer – Yggdrasil Gaming – RTP: 98%
Is there a link between joker-themed slot games and the highest payout slot machines? If you take Jokerizer into question, there surely is. Yggdrasil’s premier slot has an RTP of 98%, but this time, it’s a high instead of a low variance slot game.
The thing that sets it apart is the fun gameplay which blends old-school action with modern features such as 10 pay both-way paylines. Mystery Wins are a welcome mystery addition that can spice up your wins even further, there’s the same 6000-coin max mystery win, but in Jokerizer mode, it only takes 2 jokers to get a mystery win, which could be a 6000 coin win!
#10 1429 Uncharted Seas – Thunderkick – RTP: 98.60%
Thunderkick may not be known as the king of online slots with high RTP, but 1429 Uncharted Seas definitely falls into that category. It’s a slot with an RTP of 98.60% that puts you on a voyage through uncharted seas in the Age of Discovery. It’s quite a unique weel themed slot taking place in an almost live treasure map, with great graphics and animations that stand out from the crowd.
In terms of gameplay, it’s a low-volatility slot game with 25 fixed paylines. The maximum possible win is 670 times your stake which is more than solid for a slot with such high RTP. Considering the maximum bet is $100 per spin, you can win a substantial amount of cash with a bit of luck. But this makes a perfect machine for completing bonus wagering on!
#11 Rainbow Riches – Barcrest – RTP: 98%
Yet another vintage Barcrest slot, Rainbow Riches remains one of the best and most popular RTP slots of all time. It may be over a decade old, but its 98% RTP, medium variance, and 500x wins have stood the test of time. Due to its overwhelming popularity, there have been numerous versions released over the years, with Pick n Mix, Megaways, and many other variants, but you cannot beat the original version!
You can try it for free to learn the ropes or play it with real money or a no-deposit bonus. Whatever you choose, one thing’s for sure – it’s one of the top highest payout online slots ever.
#12 Starmania – NextGen – RTP: 97.87%
NextGen’s sole position on this list is taken by Starmania. The star-studded slot game has an RTP of 97.87% and a low-medium variance. With 10 paylines into the mix and fun gameplay, Starmania is a top slot machine that you don’t want to miss. Heavily inspired by the more well-known Starburst slot from NetEnt, this machine has very similar base game features but adds a proper bonus round.
The base game may not be particularly exciting with wild reels and re-spins, but wait until you get to the free spins bonus round, where the full potential of this slot is to be found.
#13 White Rabbit Megaways – Big Time Gaming – RTP: 97.72%
Big Time Gaming is a master when it comes to the highest payout slot machines, and White Rabbit Megaways is proof of it. With its RTP of 97.72% (using the Bonus Buy feature), high variance, and the Megaways engine into play, this is one of those highest payout online slot machines that you simply must try.
Need more reasons for it? How about the maximum winning potential of 10,000x your stake and the unique expanding reel set offering up to 248,832 ways to win? Released in 2017, White Rabbit is a slot game that’s well worth your time and money.
5 Highest RTP Online Slot Games in 2023
|Book of 99||Relax Gaming||99%|
|Zeus Lightning Power Reels||Red Tiger Gaming||97.73%|
|Ooh Aah Dracula||Barcrest||99%|
High RTP Online Casino Recommendations
Now you know what the best online slot games with the highest RTP are; you want to know where to play them, right? Well, our pick of the best online casinos to play at are:
We have also checked out each individual online casino and pulled the best online slots from each operator, so you don’t have to! If you want to play online, you can see our pick of recommended slots for each operator below:
- Caesars online casino slots
- Best slots at BetMGM online casino
- Borgata online casino slot games
- Best rated slots on FanDuel
- DraftKings casino best slot games
What is RTP (Return To Player)?
RTP stands short for Return to Player. It’s a term displayed in percentages that shows the likelihood of a slot’s pay rate in the long run based on the money wagered on it. For example, a top slot machine with an RTP of 97% means that it pays back 97% of all bets made back to players, but this figure is worked out over a higher number of wagers (In the millions or even billions while testing the slot for fairness).
To put things into perspective, such a slot will pay you back on average $97 on every 100 $1 bets/spins. Many players confuse the high slot RTP with a winning guarantee, but they’re not the same. A high-RTP slot may pay more back overall based on the money wagered on it, but winning in online slots is never guaranteed. For an individual player to win, they need to achieve more than 100% RTP, which essentially means the machine for that specific session paid out more money than what was wagered on it. Think of the stated RTP on the machine as an indication of how tight or loose, it is; the remaining percentage value to 100% is effectively the house edge. The closer to 100% the RTP is, the smaller the casino’s house edge is.
With that being said, all experts recommend playing the highest payout slot machines. They give you a much better chance to win at least some of your bets, which is precisely what all players are hoping for. Of course, other factors play a role, such as the volatility and variance of a machine, but for what it’s worth, the slot RTP is one of the most important ones. You may also want to read our separate guide on which slot machines have the best odds.
How Is Slot RTP Calculated?
No calculator can tell you the exact slot RTP; the figures displayed on an online slot machine are based on millions of spins where all possible outcomes have been recorded from the machine; in reality, this value should be called theoretical RTP, but players have not adopted this terminology. You can calculate RTP yourself as long as you track how much you have wagered. Simply divide the amount returned from your spins by the total amount you’ve wagered. Let’s put things into perspective:
- Amount returned: $96.50
- Total bets: $100 (100 spins at $1)
- RTP: $96.50/$100 = 96.50%
In most good casinos cases, the slot RTP will be displayed clearly in the game instructions, or how can ask customer support to provide this information. However, for slots that don’t list the RTP, be very cautious; you can start placing $1 bets up to $100 and see what you get in return to calculate the slot RTP, but remember the figures are normally based on millions of spins to avoid errors, so if you are playing a very volatile machine your actual results way vary massively.
How to Tell When A Slot Machine Is About to Hit
Slots are a game of pure chance, so there’s no way to tell when a slot machine is about to hit. They sometimes tend to run hot or cold, just like all random events do. The variance implemented in all slots can result in a string of wins or losses. That’s where the hit frequency and variance come into play along with the slot RTP.
What’s important to remember is that slots don’t have a programmed predictive value. They aren’t programmed to catch up after big wins and owe you nothing after a string of losses. If anyone tells you they can predict a hot or cold streak on the best casino slots, they’re lying. They can certainly show you one based on previous results, but this has no bearing on the future outcomes of a slot machine.
The RTP percentage value is one of the most important for a slot, so make sure to always choose shots with the highest RTP. Secondly, consider the variance and volatility of a machine and pick the ones that match your goals from playing. That goes for both real money play, sweeps casinos, and playing with a no-deposit bonus.
The top 3 highest RTP online slots are;
- Ugga Bugga – Playtech - RTP: 99.07%
- Book of 99 – Relax Gaming - RTP: 99%
- Mega Joker – NetEnt - RTP: 99%
The full list of the highest RTP slots online is presented in our full article.
This question is irrelevant to making an informed decision when playing slots. The RTP varies for each slot game at an online casino; if the casino had all players playing just one very high RTP game, it might look like overall, they pay more back, but this broadly used term depends on the games being played.
Seek out slots with a high theoretical RTP, and you then know what return to player to expect at any licensed casino!
As a general rule, the higher the RTP, the better when discussing online slots. The house edge is smaller, meaning more money is returned to the players overall.
Players must also consider the volatility and variance of online slots; just because a slot has a high RTP does not mean it can produce big wins. Depending on your overall goals as a slot player, there are many factors to consider!
The industry average for online slot RTP is in the 95% to 96% region, so anything higher than 96% should be considered a good RTP, with exceptional RTP being 97.5% or above.
The theoretical RTP value that shows what the slot machine should return to players is commonly listed in the paytable information or help files of an online slot machine.