Highest RTP Slots & Best Payout Games

When playing slot games online, you want the best chances of winning. OLBG has made this easy for you the best payout slots available. This includes the slot games with the highest RTP rates and slots with the highest max win potential per spin (excluding progressive jackpots).

OLBG also highlights licensed UK slot sites to play them at. Furthermore, OLBG goes into detail about what RTP is, how to find RTP rates and varying RTP rates for slot games.

Best RTP Slots

If you want to play slots with the highest RTP rates, look no further. Below are the 10 best online slots payout percentages with details on each release:

1. Ugga Bugga: 99.07% RTP 

Released by Playtech in 2006, Ugga Bugga is the slot game with the highest RTP rate online. Boating a 99.07% RTP, it’s an African jungle-themed game with 3 reels and 10 individual paylines.

Known as the Multi-Spin feature, you aim to form winning combinations on as many paylines as you can. Offering 1,000 times bet max wins, this cult favourite may be simple but no other slot game comes close in terms of returns.

4.8 / 5 4 Ratings

BetMGM Casino Review

• No. of slots 1000+
• Payout speed 24 Hours
• Win rate Variable

BetMGM UK do classic, cluster & MEGAWAYS slots from the best game studios with a huge live dealer casino too!

• Fresh New Brand in The UK
• Huge Casino Game and Slot Selection
• One of the Biggest Online casino businesses in the World

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2. Book of 99: 99% RTP 

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.

The Free Spins feature comes with a special expanding symbol which can lead to 5,000 times bet max wins on each free spin. With unlimited free spins to be won, there are also 2 ways to trigger the free spins.

4.9 / 5 8 Ratings

Casushi Review

• No. of slots 1110
• Payout speed 24 hours
• Win rate 97%

Inspired by Japanese culture and food, Casushi is a unique and fun online casino that wants to help you find your “Zen of Happy Play.”

• Excellent website deisgn
• New slots constantly added
• PayPal available for UK users

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3. 1429 Uncharted Seas: 98.6% RTP

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.

Offering expanding wilds in the base game and the Free Spins feature, there are up to 100 free spins up for grabs. With up to 3 wild reels per free spin, 1429 Uncharted Seas comes with 670 times bet max wins.

4.4 / 5 37 Ratings

All British Casino Review

• No. of slots 1508
• Payout speed Instant - 24 Hours
• Win rate 97.7%

Popular casino on OLBG with members thanks to fast withdrawals, All British Casino has a great range of huge jackpot slots and live casino dealers and tables, too.

• Cashback on 100% of your losses
• Filter games by provider or theme
• Exclusive All British games

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4. Marching Legions: 98.12% RTP

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.

With re-spins with stacks of high-value legionary symbols matching onto the reels, filling the meter fully triggers the Free Spins feature. Here, collect 3 horns to benefit from more Marching stacks which shift with each free spin. This can lead to 10,000 times bet max wins.

4.3 / 5 11 Ratings

Jackpot.com Review

• No. of slots 1000
• Payout speed 1-3 Days
• Win rate Variable

Play Games at UK.Jackpot.com: slots, progressive jackpots, instant win and many more

• Bet on the Biggest Global Lotteries
• Great Live Casino
• £500k Drops and Wins Slots

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5. Blood Suckers: 98% RTP

With a 98% RTP rate, Blood Suckers is a NetEnt slot game with 5 reels and 25 paylines. Based on blood-sucking vampires, it was released way back in 2013 and can be played from 25p per spin.

In the Vampire Slaying Bonus, you pick from coffins to unveil cash prizes.  In the Free Spins feature, there is a trebling 3x multiplier on all wins as well as extra free spins to be won. With 1,014.6 times bet max wins, its popularity has spawned a sequel (Blood Suckers 2) and a Megaways version (see below).

4.0 / 5 13 Ratings

PlayOJO Review

• No. of slots 1600
• Payout speed 24 Hours
• Win rate 96%

Bonuses paid in cash, no withdrawal restrictions PlayOJO claim to be the fairest online casino and provide a complete online casino experience for the most demanding of players.

• Hot and Cold Slot Guide
• PlayOJO Kickers (Promotions)
• OJO+ Money Back on Every Bet

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6. Money Cart: 98% RTP

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.

With a Wild West theme, 3 or more bonus symbols trigger the Re-Spin feature. With 3 re-spins awarded, any symbol will reset your re-spins tally. Bonus symbols give you prizes up to 1 x bet and wideners increase your chances of winning with an extra reel. There are also Collector, Payer, Persistent Payer and Persistent Collector symbols which increase your win potential up to 2,000 times your total bet.

4.1 / 5 7 Ratings

Unibet Review

• No. of slots 2500+
• Payout speed 24 Hours
• Win rate Variable

Unibet offers an unparalleled selection of online slots and featured games. From classic fruit machines, to new games and festive slots. Unibet has something for everyone

• Huge Slot Selection
• Dozens of Roulette and Blackjack Options
• Low Minimum Deposits

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7. Money Cart 2: 98% RTP

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).

With 3 re-spins awarded, any symbol landing will see your re-spins tally revert to 3. There are various symbols that can land including a Golden Bonus (up to 20 x bet), Payer and Collector. Look out for Sniper and Necromancer symbols which doubles the value of up to 8 symbols and brings up to 7 symbols back to life. Max wins can reach 5,000 times your total bet.

4.5 / 5 2 Ratings

LeoVegas Casino Review

• No. of slots 2000
• Payout speed Instant - 24 Hours
• Win rate 96.9%

No wonder LeoVegas has won 'best online casino' - Fast Withdrawals, 65 Live Tables and a tiered loyalty system, not to mention just about every slot game you could remember.

• Incredible range of slots from top suppliers
• Exclusive live table games
• Excellent customer service

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8. Jokerizer: 98% RTP

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 just 20p per spin. 3 or more Joker symbols will lead to a Mystery Win of up to 600 times your total bet.

Every win activates the Jokerizer Mode where you can gamble for more wins: 2 Joker symbols will lead to a Mystery Prize of up to 600 x bet. Simple yet fun, Jokerizer is still a very popular title due to its straightforward gameplay and high RTP rate.

4.6 / 5 10 Ratings

Hot Streak Review

• No. of slots 600
• Payout speed Instant - 24 Hours
• Win rate Variable

Hot Streak Casino complements Fast Withdrawals with new games to choose from every week.

• Fast Withdrawals
• Great Welcome Offer
• The Newest Slot Titles

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9. Starmania: 97.87% RTP

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.

There are 30 extra stacked wilds on the 3 middle reels which can lead to 3 wild reels per free spin. With additional free spins to be won, Starmania comes with 1,000 times bet max wins. This cosmic game is very similar to NetEnt’s Starburst slot but with a much higher RTP rate and double the win potential.

4.4 / 5 9 Ratings

PlayFrank Review

• No. of slots 1500+
• Payout speed 24 Hours
• Win rate 97.60%

Get ready for the greatest online casino experience you have ever had as you step into the wonderful world of PlayFrank Casino. Hosting popular casino games & 1500+ thrilling slots

• Over 1500 thrilling slots
• Top Slot Studios Featured
• Daily challenges and Spin offers

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10. Blood Suckers Megaways: 97.66% RTP

Rounding out OLBG’s list of the top 10 RTP slot games, 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.

Offering cascades and random base game features that award Super Wild reels and multipliers, you choose from coffins in the Free Spins feature to win more free spins, random wilds, win multipliers and Super Wild reels. Boasting the highest RTP rates for a Megaways game, it comes with 20,521.9 times bet max wins to be precise.

4.2 / 5 13 Ratings

Casumo Casino Review

• No. of slots 2900
• Payout speed Instant - 24 Hours
• Win rate 95.98%

More than 2,900 slots, a full house of classic casino games, and a Live Casino that puts you at the very heart of the action with instant withdrawals. Welcome to the Casumoverse.

• Superb New Slot Selections
• Instant Withdrawals
• Best Live Casino Providers

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Best Slot Site for High RTP Slots

If you want the slot games with the highest RTP rates and best payouts, OLBG recommends MrQ Casino. 

They guarantee the top RTP rate for all their slots and even have a custom screen before each game loads showcasing the RTP. 

Transparent and user-focused, MrQ has over 1,500 casino games to play including slots from all the top studios such as Nolimit City, Push Gaming, Pragmatic Play and Relax Gaming. 

With PayPal, debit cards and Pay By Phone payment methods available, withdrawal times are instant and free. There is also no wagering requirements on all promotions, bonuses and offers. 

Highest Max Win Slots

If you’re considering the best payout slots, this could also mean slot games with the highest max win potential. Also known as high multiplier slots, it’s defined as the slot game that pays the most on a single spin or in a bonus feature as a whole.

Excluding progressive jackpot games, below are the 5 highest max wins slots available online with Tombstone RIP offering 300,000 times bet max wins per spin!

1. Tombstone RIP: 300,000 x bet max wins

Nolimit City’s Tombstone RIP is the 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.

Featuring murder, hangings and amputations, the hit frequency rate of 9.08% means you’ll land a win every 11 spins on average. If you win 1 x bet or lower, it’s not even awarded! There are lots of wild extras as well as 2 free spins features. Look out for the Boothill Free Spins which has Cowboys that come with multipliers up to 999x.

4.4 / 5 12 Ratings

Dream Vegas Review

• No. of slots 2071
• Payout speed Instant - 24 Hours
• Win rate 96%

Whether you crave the evocative, fast-paced excitement of online slots, or the thrill of live casino and table games, Dream Vegas has it all along with Instant Withdrawals.

• Must Go Jackpot Slots
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2. Starburst XXXtreme: 200,000 x bet max wins

NetEnt’s long-awaited sequel to Starburst is the 5 reel, 9 payline Starburst XXXtreme. Playable from 10p a spin, 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.

With Starburst Wilds expanding and awarding re-spins on the 3 middle reels, Starburst XXXtreme adds multipliers up to 150x which can combine up to 450x! This can lead to 200,000 times bet max wins which is significantly more than the 500 x bet payouts in the original slot.

4.9 / 5 9 Ratings

Duelz Review

• No. of slots 1000+
• Payout speed Instant Options
• Win rate 96.5%

Duelz Casino is a medieval-themed online casino with over 2,000 casino and slot games. With weekly cashback and regular promotions, there’s an abundance of payment methods to use including 6 minute instant withdrawals.

• Instant Withdrawals
• Mobile-first Casino
• Huge Range of Slots from many Providers

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3. Peking Luck: 180,000 x bet max wins

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.

In the Free Spins feature, you pick from fans to win up to 38 free spins with an 18x multiplier. With the potential for 180,000 times bet max wins, Peking Luck is the highest paying of all Pragmatic Play slots.

4.8 / 5 11 Ratings

Winomania Review

• No. of slots 700
• Payout speed Instant - 24 Hours
• Win rate Variable

Fast Withdrawals and jaw-droppingly cool in-house games, enjoy an extravagance of elegant, fun features, dynamite themes, and stellar graphics & audio

• Fast Withdrawals
• Live Casino
• Weekly Slot Promotions

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4. Money Train 4: 150,000 x bet max wins

The last in the series, Money Train 4 is by Relax Gaming and has a steampunk/futuristic theme. Played on a 6x6 grid with Scatter Pays, you can spin away from 10p a spin on all devices. There are random respins with multipliers in the base game but the focus is on the Money Cart Bonus.

With 3 spins awarded, there are 20 special symbols that can land, each with their function. The Persistent symbols apply on each spin and the new Arms Dealer and Upgrader symbols can lead to 150,000 times bet max wins. This must-play slot game is one of the most popular online.

4.7 / 5 12 Ratings

Pub Casino Review

• No. of slots 1500
• Payout speed 24 hours
• Win rate Variable

Pub casino offers a wide range of different live casino tables with real dealers and online casino games including live roulette, live blackjack, live baccarat, live game shows, video slots, classic slots, slingo and video poker.

• Over 1500 slots
• Lots of Slingo
• Wide range of deposit methods

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5. San Quentin: 150,000 x bet max wins

Based on the infamous prison, San Quentin is by Nolimit City and is played with 5 reels and 243 ways to win from just 20p per spin. There are Enhancer Ceels which reveal xWays, Razor Splits and Split Wilds which can lead to over 13 billion ways to win!

In the Lockdown Spins, there are up to 3 Jumping Wilds with multipliers that can double up to 512x. This can lead to 150,000 times bet max wins on each free spin. San Quentin also inspired other slots by NLC such as Folsom Prison (prison theme) and Kenneth Must Die (character Beefy Dick).

4.3 / 5 6 Ratings

Grand Ivy Casino Review

• No. of slots 1800
• Payout speed 24 hours
• Win rate 96.25%

Grand Ivy Casino offer a premium casino experience with online slots from the best providers and superb live dealer tables too.

• Over 2000 Slot Games
• Top slot studios featured
• Superb Site Design

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What is RTP?

RTP is short for Return to Player. It’s the term that describes the payback percentage of a casino 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.

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 or online casino 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

To find a slot game’s RTP rate, there are a few ways to do it. Firstly, reading the details slot reviews at OLBG is one way but we don’t have details on every single online slot game, unfortunately. You could also head to the slot studio’s website.

Within a slot game, you’ll find the RTP from the game’s Paytable, Information or Help section. 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 casino sites are becoming transparent when it comes to RTP rates. MrQ Casino offers the highest RTP rate on all their slot games. They also display the RTP prominently when firing up a slot game!

Multiple 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.

Each slot or casino 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 we 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 casino and the player based on the wager of £1,000, £1 million or £1 billion:

If a particular casino site were to offer the 84.18% RTP version as opposed to the highest RTP of 96.21%, here is how much more they would make:

• £120.30 more per £1,000 staked/wagered
• £120,300 more per £1 million staked/wagered
• £120.3 million more per £1 billion staked/wagered

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:

Impact on Casino Bonuses

It’s all well and good that we’ve identified the highest RTP slot games. Popular amongst players, there are not popular with casino sites. Well, you may find lower RTP versions at certain casinos but you will also find that the best RTP slots will not contribute to a casino’s welcome bonus or free spins wagering requirements.

Playing a slot game with a high RTP rate will make it easier for players to complete the wagering requirements and convert the casino bonus into cash. Most casinos will therefore not include slot games with RTP rates of 97% or higher as part of the eligible games for wagering requirements.

High RTP slot games are similar to casino games such as roulette, video poker, baccarat and blackjack. Due to the very high RTP rates for these casino games, they normally contribute 10% towards a casino bonus’ wagering requirements. If you were to wager £100 for example, only £10 would be valid for the wagering requirements.

Pros and Cons of High RTP Slots

As with everything, there are both positives and negatives to playing the best RTP slot games. Below OLBG highlights the main pros and cons with the pros outweighing the cons:

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