I understand that players are looking for the thrill of the online slot game combined with the best possible returns. That’s why I put together this guide to identify the best slots to play with high RTP payouts and which slot sites to play them at.
10,000+ Slot Games Played
Best RTP Payout Online Slots
If you want to play slots with the highest RTP rates, below are the 10 best online slots payout percentages with details on each release. In all instances, you'll also find free slot demos where you can try for free:
1. Book of 99: 99% RTP
- RTP: 99%
- Max Win: 12,075x
- Volatility: Very High
- Stakes: 10p to £5
- Release Date: 4 May 2021
Released by Relax Gaming in May 2021, Book of 99 is a 5 reel, 10 payline slot game with a 99% RTP rate. With an ancient Greek theme, you can spin away on this popular ‘Book of’ slot from 10p a spin.
2. 1429 Uncharted Seas: 98.6% RTP
- RTP: 98.6%
- Max Win: 670x
- Volatility: Low
- Stakes: 10p to £5
- Release Date: 5 May 2016
1429 Uncharted Seas is a 5 reel, 25 payline slot from Thunderkick that comes with a 98.6% RTP rate. With a seafaring theme, you can spin away on all devices from 10p per spin. Set in the Middle Ages, it’s one of the most unique-looking games you’ll come across.
New players only | Deposit & wager at least £10 to get free spins | Free Spins winnings are cash | No max cash out | Eligibility is restricted for suspected abuse | Skrill deposits excluded | Free Spins value £0.10 per spin | Free Spins expire in 48 hours |
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3. Marching Legions: 98.12% RTP
- RTP: 98.12%
- Max Win: 7,458x
- Volatility: Medium
- Stakes: 10p to £5
- Release Date: 2 July 2020
Set in ancient Rome, Marching Legions is by Relax Gaming and has 5 reels and 243 ways to win. Playable from 10p per spin on all devices, it has a 98.12% RTP rate.
4. Money Cart: 98% RTP
- RTP: 98%
- Max Win: 2,000x
- Volatility: Medium
- Stakes: 10p to £5
- Release Date: 7 December 2021
Released after Money Cart 2 oddly (below), Relax Gaming’s Money Cart has a 98% RTP rate. Using a Bonus Reels mechanic, it’s played with 5 reels and no base game or winning combinations possible. Playable from 10p per spin, the game comes alive when you land 3+ bonus symbols.
5. Money Cart 2: 98% RTP
- RTP: 98%
- Max Win: 5,000x
- Volatility: Medium
- Stakes: 10p to £5
- Release Date: 20 July 2021
With a 98% RTP rate, Money Cart 2 also uses the Bonus Reels mechanic and is a bonus feature version of the Money Train 2 slot game. Released in July 2021 by Relax Gaming, this Wild West/steampunk adventure focuses on the streak re-spin feature (triggered by landing 3 or more Bonus symbols).
New cust only. Opt in & deposit £10+ in 7 days & wager 1x in 7 days on any eligible casino game (excluding live casino and table games) for 50 Free Spins. Wagering contributions vary. Free Spins worth 10p each on Big Bass Splash. 3 day expiry. 18+. T&Cs apply.
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6. Jokerizer: 98% RTP
- RTP: 98%
- Max Win: 600x
- Volatility: Very High
- Stakes: £1 to £5
- Release Date: 1 March 2016
Jokerizer is a Yggdrasil Gaming-powered slot game with 5 reels and 10 paylines. With a 98% RTP rate and a jester/fruit machine theme, you can spin away from £1 per spin. 3 or more Joker symbols will lead to a Mystery Win of up to 600 times your total bet.
First deposit only. Min. deposit £20. Min Wager £20 on slots. Max 100 Free Spins. Max one claim. Spins credited within 7 days after deposit. Spins valid on Big Bass Splash. Spin value 10p. Full T&Cs apply. 18+
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7. Blood Suckers: 97.99% RTP
- RTP: 97.99%
- Max Win: 1,014.6x
- Volatility: Low
- Stakes: 25p to £5
- Release Date: 10 November 2013
With a 97.99% RTP rate, Blood Suckers is a NetEnt slot game with 5 reels and 25 paylines. Based on blood-sucking vampires, it was released in 2013 and can be played from 25p per spin.
8. Starmania: 97.87% RTP
- RTP: 97.87%
- Max Win: 1,000x
- Volatility: Medium
- Stakes: 10p to £5
- Release Date: 10 September 2015
Starmania is by Light & Wonder/NextGen Gaming and has a 97.87% RTP rate. With 5 reels and 10 paylines, you can spin away from 10p a spin. Set in outer space, it focuses on the Free Games feature where you begin with 10 free spins.
9. Blood Suckers Megaways: 97.66% RTP
- RTP: 97.66%
- Max Win: 20,521.9x
- Volatility: Very High
- Stakes: 10p to £5
- Release Date: 26 January 2023
In 9th place, you have Red Tiger’s Blood Suckers Megaways. With a 97.66% RTP rate, it has 6 reels and up to 117,649 ways to win. The Megaways version of the popular Blood Suckers slots by sister company NetEnt, you can spin away from 10p per spin.
18+. New customers only. Opt-in required. 50% Deposit Bonus up to £100 on first deposit. Min deposit £20. 10x wagering on bonus amount. Max £5 per bet. Bonus valid for 7 days. Game, play and payment method restrictions apply. Play responsibly • BeGambleAware.org
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10. Le Vampire: 97.57% RTP
Rounding out the list of the highest RTP slots is Le Vampire, from Hacksaw Gaming. With a 97.57% RTP rate, this 6x5 grid slot uses Cluster Pays. With Golden Squares activated by Rainbow symbols that reveal Coins, Clovers and Bag/Pot of Gold symbols, there's a Coffin Break Free Spins feature where the Symbol Bar upgrades symbols to Epic versions for extra free spins, plus Blood Squares that reveal higher-value Coins. Max win potential is 15,000 x your total bet.
Best Site for High RTP Slots
If you want the slot games with the highest RTP rates and best payouts, I recommend Slots Temple.
With a high RTP guarantee for all their slot games, they will even give you £50 if you see a slot game they have at another UKGC licensed slot site for a higher RTP rate: they will also match the RTP!
Transparent and user-focused, Slots Temple has over 1,000 slot games to play, including slots from all the top studios such as Nolimit City, Push Gaming, Pragmatic Play and Relax Gaming. Find out more in our complete Slots Temple review.
Highest Payout Slots by Max Win
If you’re considering the best payout slots, this could also mean slot games with the highest max win potential.
Excluding progressive jackpot games, below are the 5 highest max wins slots available online with Tombstone Slaughter offering 500,000 times bet max wins per spin!
1. Tombstone Slaughter: 500,000 x bet max wins
- RTP: 96.01%
- Max Win: 500,000x
- Volatility: Insane
- Stakes: 20p to £5
- Release Date: 28 January 2025
Join El Gordo's daughter on her quest for revenge in Tombstone Slaughter. By Nolimit City, this brutally volatile slot game has 6 reels and begins with 324 ways to win. With xNudge Wilds with increasing multipliers and Reel Split Wilds, there are Revolver symbols that bring Cylinder features into play. Offering 500,000 times bet max wins, it's the highest-paying slot game ever made ensuring it's the new sheriff in town.
- No. of slots 1500
- Payout speed 24 hours
- Win rate Variable
500,000x
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2. Tombstone RIP: 300,000 x bet max wins
- RTP: 96.08%
- Max Win: 300,000x
- Volatility: Insane
- Stakes: 10p to £5
- Release Date: 11 January 2022
Nolimit City’s Tombstone RIP is the second-highest max win slot available online. With 5 reels and 108 paylines initially, this brutal and gory Wild West adventure boasts 300,000 times bet max wins and a 96.08% RTP rate.
- No. of slots 2500+
- Payout speed Instant - 24 Hours
- Win rate 96%
300,000x
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3. San Quentin 2: Death Row: 200,000 x bet max wins
- RTP: 96.13%
- Max Win: 200,000x
- Volatility: Extreme
- Stakes: 20p to £5
- Release Date: 24 September 2024
Don’t drop the soap again in San Quentin 2: Death Row. This sequel from Nolimit City begins with 5 reels and 1,024 ways to win with Enhancer Cells awarding high-value inmate symbols, xWays and Razor Split symbols. Dramatically increasing the number of ways to win, the Max Win multiplier here is 200,000x
- No. of slots 1800
- Payout speed 24 hours
- Win rate 96.25%
200,000x
Head off to Grand Ivy to Play San Quentin II or tons of other games.
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4. Starburst XXXtreme: 200,000 x bet max wins
- RTP: 96.26%
- Max Win: 200,000x
- Volatility: Very High
- Stakes: 10p to £5
- Release Date: 15 July 2021
NetEnt’s long-awaited sequel to Starburst is the 5 reel, 9 payline Starburst XXXtreme. Playable from 10p a spin, and a max win of 200,000x, you head to outer space once again but with plenty more rocket fuel. With a 96.26% RTP rate, it feels very similar to the original cult favourite.
- No. of slots 1000+
- Payout speed Instant Options
- Win rate 96.5%
200,000x
Find this XXXtreme version of Starburst at one of the best online slot sites
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5. Peking Luck: 180,000 x bet max wins
- RTP: 96.5%
- Max Win: 180,000x
- Volatility: Very High
- Stakes: 25p to £5
- Release Date: 30 August 2018
Head into the world of Chinese opera in Peking Luck. With 5 reels and 25 paylines, it comes with a 96.5% RTP rate and can be played from 25p per spin. There are Wild Multipliers that double your payout and up to 180,000 times your bet for max wins.
- No. of slots 1900+
- Payout speed Instant - 24 Hours
- Win rate Variable
180,000x
Winomania host the Peking Luck slot game along with super quick withdrawals.
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High Max Win by Slot Provider
With the 5 highest max win slots highlighted above, I thought it would be of interest to provide a table showcasing the slot game with the highest win potential by slot provider (where available). I've listed them from highest to lowest win potential.
What is RTP?
RTP is short for Return to Player. It’s the term that describes the payback percentage or payout, if you like, of a slot game. With the average RTP rate around the 96% mark for online slot games, you would expect to win £96 back for every £100 you wager on average. (over billions of theoretical spins)
Theoretical RTP
To calculate your RTP rate for a particular session on a slot game, you need to divide your win amount by the wager/stake amount. Here are a couple of scenarios:
- Win: If you were to wager £100 and win £120, your actual RTP would be 120%
- Lose: If you were to wager £100 and won £60, your actual RTP would be 60%
The longer you play, the actual RTP should get closer to the theoretical RTP rate. If a slot game’s RTP rate is 96%, the slot site will in theory win 4%. This is calculated over a cycle of billions of spins. You may be the lucky player who walks away with an RTP rate of over 100% but other players will not. This all balances at over a certain number of spins at the theoretical RTP rate.
How to Find a Slot Game’s RTP Rate
There are a few ways to find a slot game’s RTP rate. Firstly, reading the detailed slot reviews at OLBG is one way, but not one site has details on every single online slot game, unfortunately. You could also head to the slot studio’s website.
You’ll find the RTP from the game’s Paytable, Information or Help section within a slot game. Each studio presents the information differently, with some specifying the RTP rate as soon as you fire up the game. Others mention them deep inside the Paytable or from a small information link at the bottom of the game’s screen.
Some slot sites are becoming transparent when it comes to RTP rates. MrQ offers the highest RTP rate on all their slot games. They also display the RTP prominently when firing up a slot game!
Variable RTP Settings
Whilst playing the best RTP slot games is great, you should know that studios or slot providers create multiple RTP versions or settings for their slots. You may have noticed that OLBG specifies 2, 3, 4, 5 or even 6 RTP rates for slot games in our detailed reviews.
RTPs can Change
Each slot site can choose the RTP setting they want for each game. This can drastically influence how much money they make from a slot game and how much you can win.
If I take a look at the most popular online slot game, Play ‘n GO’s Book of Dead, there is a table below showing 5 RTP versions with the difference for both the site and the player based on the wager of £1,000, £1 million or £1 billion:
RTP Rates in Jackpot Slots
If you’re a fan of slot games with progressive jackpots, you’ll notice that their RTP rates tend to be lower than standard slot games. This is because a portion of the RTP rate contributes directly to the jackpots.
The progressive jackpots increase the more players play basically. Below is a table highlighting the RTP allocation for the biggest jackpot slots:
Pros and Cons of High RTP Slots
As with everything, there are both positives and negatives to playing the best RTP slot games. Below I highlight the main pros and cons with the pros outweighing the cons:
Pros
- Higher chance of winning long-term
- Your balance should last longer in theory
- Smaller house edge/margin
- Found at most UK casino/slot sites
Cons
- High RTP slots are often excluded from or contribute less towards bonus wagering requirements.
- Multiple RTP versions available on high RTP slots
FAQs
FAQ
Best Payout Slots FAQs
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The slot games with the best Return to Player rates include Playtech’s Ugga Bugga (99.07%), Relax Gaming’s Book of 99 (99%) and Thunderkick’s 1429 Uncharted Seas (98.6%).
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RTP stands for Return to Player and is the term used to describe the payback percentage of a casino or slot. With the average around 96% for online slots, the RTP is calculated over billions of spins (theoretical RTP).
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Open the slot game’s Paytable, Help or Info section where you’ll find the RTP in most cases. If not, check the studio’s website or OLBG’s detailed slot reviews.
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The average RTP for slot games online is around 96%. However, with more regulation, RTP rates have reduced under 96% in most cases. Slot game providers/studios do offer multiple RTP settings which casinos can choose from.
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You can calculate a slot game’s RTP rate by dividing the win amount by the wager/turnover figure and multiplying by 100. This will determine your particular return for that individual session.
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The theoretical RTP rate for online slots is the expected payback percentage over a large number of spins (normally in the billions). The more you play, the closer to this figure you will get, in theory.
