Best Online Slots With Highest RTP

Below is a list of some of the highest RTP slots available in UK casinos, along with some details about each of them.

Slot RTP Software

Ugga Bugga



Book of 99


Relax Gaming

Ooh Ahh Dracula



Jackpot 6000



1429 Uncharted Seas



Blood Suckers


NetEnt (Red Tiger Gaming)

Ugga Bugga (Playtech) 99.07%

Ugga Bugga Slot

Ugga Bugga is one of the highest RTP slots that is available in most British online casinos. This is one of the Playtech slots, with a design that is notable for being different from traditional slots. It features a tribal or jungle theme with an array of exotic symbols, creating an immersive experience.

Unlike typical slot games, Ugga Bugga has a unique structure. It consists of 10 rows, each with 3 reels and 1 payline, making it more akin to 10 slot games in one. It incorporates a skill element in its gameplay too.

After the initial spin, players can choose to hold certain symbols, and these are then replicated across all rows, influencing the final outcome.

Due to the high payout rate of Ugga Bugga, it is very easy to trigger a winning combination in the game. This means that players can expect a high return after playing in the long run, but the outcome still depends solely on luck.

Book of 99 (Relax Gaming) 99.00%

Book of 99 Slot

With a captivating ancient theme set in the old Greek era, Book of 99 is among the top slots with numerous positive highlights. The 5-reel slot from Relax Gaming features 10 paylines and multipliers of up to 5,000x your stake. The slot RTP sits at 99%, which also partially represents the game’s branding.

As expected, there are many bonus features, as well as wilds and spins, thatadd the excitement and allow you to maximise your gaming sessions. However, despite the high RTP rate in this slot, it falls into the category of high volatility slots, resulting in less frequent payouts.

Ooh Ahh Dracula (Barcrest) 99.00%

Ooh Aah Dracula Slot Game

Ooh, Ahh, Dracula is one of the top vampire-themed slots with a unique gameplay concept and captivating graphics. This is a slot with 5 reels, 10 paylines, and many other features that can greatly improve your gaming experience.

⚡ Good to know: Ooh, ahh, Dracula slot includes several bonus features such as free spins, wild symbols, and a unique “Heart Attack Bonus” where players can increase their winnings. There’s also a “Hi Roller” option, giving players the chance to bet more for additional bonus opportunities.

Besides these nice features, the game also boasts a mobile-friendly design that ensures seamless gameplay across all devices. Additionally, there’s also a free spins feature to maximise potential payout.

Jackpot 6000 (NetEnt) 98.90%

Jackpot 6000 Slot

Jackpot 6000 is among the highest RTP NetEnt slots, with an RTP of 98.90%. This game features several classic slot elements making it more like an arcade game. it is designed to mimic a traditional fruit machine, offering a nostalgic experience. Its symbols include fruits, stars, bells, and jokers.

Jackpot 6000 is a 3-reel slot with a super metre mode that triggers whenever you land a win. This mode unlocks several bonus features, transforming the game from a basic 3-reel to a high-class RTP slot.

1429 Uncharted Seas (Thunderkick) 98.60%

1429 Uncharted Seas Slot

1429 Uncharted Seas is a 5-reel slot from Thunderkick with a maximum winning multiplier of up to 670x your stake, 25 paylines and cool bonus features. Though the game’s visuals and overall gameplay setting are unique, one of its key highlights is its high RTP of 98.60%.

1429 Uncharted Seas has a unique nautical and exploration theme, set in the era of sea voyages and discoveries. The game stands out for its artistic design, resembling an old maritime map, and includes symbols like ships, sea creatures, and celestial bodies. The slot also includes an in-game free spin feature, further expanding the rewards a player can receive while playing the game.

The game is designed to be compatible with various platforms, including desktop and mobile devices, allowing players to enjoy the game both at home and on the go.

Blood Suckers (NetEnt, Red Tiger Gaming) 98.00%

Bloodsuckers Slot

Blood Suckers is a trendy vampire-themed slot, set in the Victorian era. True to its name, it features a Gothic horror aesthetic, complete with symbols like vampires, garlic, holy water, and antique weapons.

🎰 Did you know? It’s a NetEnt classic known for its huge payouts reaching as high as 20,000x your bet, with over 100,000 ways to win.

Blood Suckers slot includes several bonus features, such as free spins, wild substitutions, and a unique vampire-slaying bonus game, which add an extra layer of excitement to the gameplay.

This 6-reel slot is one of the top titles developed by NetEnt, and comparable to other top games from the company, like Starburst and Gonzo’s Quest.

Where to Play The Best RTP Slots

Most of the highest RTP slot machines are developed by renowned game studios and are available at the best casino sites. Below, we’ve outlined some recommendations for the top slot sites to play the highest RTP online slots in the UK.

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  • Classic slots
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Get 100% up to £100 + 10% Cashback Always

Welcome bonus for new players only | Maximum bonus is 100% up to £100 | Min. deposit is £20 | No max cash out | Wagering is 35x bonus | Maximum bet with an active bonus is £5 | Eligibility is restricted for suspected abuse | Cashback is cash with no restrictions | Skrill & Neteller deposits excluded | Cashback applies to deposits where no bonus is included | T&C's apply See full T&Cs for more detail. 18+ Please Play Responsibly.

  • Trusted Casino
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  • Sportsbook

Stake £10 and Get 50 Bonus Spins

Deposit and stake £10 on eligible Casino games to get 50 Free Spins. Time limits, game restrictions and T&Cs apply. See full T&Cs for more detail. 18+ Please Play Responsibly.

  • Trusted and known brand
  • Large selection of games
  • Sportsbook

Get 100% Deposit Bonus Up to £200

Get 100% deposit bonus up to £200 on your first deposit. £ Min. deposit 10. New players only. 35 times wager requirement. Bonus balance is not playable. Max bet up to a value of 50% of the bonus amount on any game or an amount up to £20. You can activate the Welcome Bonus within 30 calendar days. Terms & Conditions Apply. See full T&Cs for more detail. 18+ Please Play Responsibly.

  • Super Fast Withdrawals
  • Loyalty Programme
  • Hundreds of premium games

Get up to £300 Bonus + 30 Bonus Spins

1st deposit (excluding PayPal) of £20 with code Magical. Max bonus £300 on selected Match Slots, 40x wagering on the sum of deposit & bonus, 5x max conversion rate. 50 bonus spins on Starburst Slots, spin value 0.20P. Bonus spins and winnings playable on Starburst Slots only, 50x wagering requirements. 5x max conversion rate. Full T&Cs apply. See full T&Cs for more detail. 18+ Please Play Responsibly.

  • 1000 Games
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Get 100% Bonus up to £50 + 100 Spins

New depositing players only. Min deposit ‎£10. 100 spins require 3 deposits. Min. second and third deposit £20. Spins and bonus wagering requirement: 35x. Spins expire after 24 hours. T&C's apply. See full T&Cs for more detail. 18+ Please Play Responsibly.

  • Generous welcome bonus
  • 2000 games
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100% Bonus up to £100 + 100 Bonus Spins

New players only. Min deposit: £20. Max £100 bonus. Max bet with active bonus: £2. Wagering required 100% match bonus: 30x deposit + bonus. Max win from welcome bonus: £500. 100 Bonus spins are given out 20 per day on Book of Dead for 5 days in a row. Max bonus spins winnings: £100. Bonus spins winnings credited as bonus money with 45x wagering & 3 days expiry. Deposit bonus & Bonus Spins wins are forfeited 30 days after bonus is credited if the wagering is not met. Game weighting and restrictions apply. See full T&Cs for more detail. 18+ Please Play Responsibly.

  • Excellent on mobile
  • Great Customer Support
  • Fast payouts

Get 100% up to £50 + 50 Bonus Spins on Starburst

New players only 18+. Min deposit £20. 40x wagering applies to match up bonus. Offer valid for one week. 50 spins on Starburst. 40x wagering applies to spins. Terms and conditions apply. See full T&Cs for more detail. 18+ Please Play Responsibly.

  • Large Game Selection
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  • Excellent on mobile

Get Up to £100 + 50 Bonus Spins on Big Splash Splash

New reg only. Opt in & deposit £10, £25 or £50 within 7 days & further 7 days to wager cash stakes 35x to unlock reward (£50 on 2 deposits). 3 day exp. Wagering/game contributions vary. 25 x 10p wager-free spins added to Big Splash Splash with each qualifying deposit. T&Cs apply. See full T&Cs for more detail. 18+ Please Play Responsibly.

  • No wagering requirements
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Spend £20 Get £75 Bonus Spins

First deposit only. Min deposit & spend £20. Max 75 spins on Big Bass Splash at 10p per spin. Spins credited upon spend of £20. Full T&Cs apply. See full T&Cs for more detail. 18+ Please Play Responsibly.

  • sports betting
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  • Lots of Bonuses Available

100 Bonus Spins + Up to £200 Bonus

Applies only to new depositing players. Min. deposit £10. Max bonus: £200. Min. wagering 35x. Spins expire in 24hr. Offer is available to players residing in United Kingdom only. See full T&Cs for more detail. 18+ Please Play Responsibly.

How Slot RTP Works

The return-to-player rate of a slot refers to the percentage of all the wagered money a slot machine will pay back to players over time. Keep in mind that the RTP is a statistical average and doesn’t a guarantee the amount of returns, as slot outcomes are random.

If the RTP of a slot sits at 96%, you will earn back 96% of your stakes on average, and in the long run.

If you wager up to £100 on such a slot, your average return would be around £96 over a period of time. The higher the RTP rate, the more money you get back. This is the reason why most customers prefer to play the highest RTP online slots, as they yield better returns in the long run.

Pros & Cons of Highest RTP Slots

Slots with the highest RTP are popular for their major highlishgts. But, it doesn’t mean that they have no flaws. In this section, we will outline all the pros and cons of playing the highest RTP slots.

  • Thumbs-Up Icon Higher payout potential
  • Thumbs-Up Icon Supports reputable game studios
  • Thumbs-Up Icon Frequent winning rate
  • Thumbs-Up Icon Good mobile optimisation
  • Thumbs-Down Icon Small wins
  • Thumbs-Down Icon Entirely luck-based
  • Thumbs-Down Icon Game weighting rules

Best RTP SlotsThe whole essence of the buzz around high RTP slots lies in their high payout potential. This advantage allows players to enjoy more frequent rewards while playing these slots over the long term.

Next, most leading game providers in online casinos produce these high RTP slots. As a result, players can consistently find fresh titles from these companies, ensuring they always have something new to explore.

When compared to low RTP slots, the highest RTP slots have an important advantage of frequent payouts from gaming sessions.

And the final key highlight of the highest RTP slots is that most games are optimised for mobile devices. They work without limitations, and their mobile editions function as seamlessly as desktop editions.

Let’s take a deep dive into the drawbacks of these games below.

👎 While some of the highest RTP slots offer the advantage of better odds, they tend to yield smaller wins. It is a significant downside, as most players engage in slots for possible huge payouts.

Even though your odds of winning are favourable when playing the highest RTP slots, remember there’s no guarantee of winning. Like other casino games, the house is the ultimate winner in the end. Your fate relies solely on the hands of the RNG software, as random results can still have you facing a losing streak.

Finally, there are always game weighting rules or restrictions when casinos feature high RTP slots as part of their bonuses. These often include limits to your wagering requirements, partial game contributions and other restrictions. If this is the case, using these slot games with your bonus offers isn’t the best idea.

How Slot RTP Relates to Slot Volatility and Casino House Edge

Slot RTP, Volatility and House Edge ExplainedA slot’s RTP rate is closely related to other casino terms like slot volatility and casino house edge. Suppose the RTP of a slot machine occurs primarily in small to medium-sized wins. In that case, the slot’s volatility is also expected to be low.

At the same time, slots with high volatility can lead to bigger wins, but they are rare to land.

Factors like the slot’s hit frequency also determine how often you can expect your gameplay to trigger a winning combo. For example, if a slot has a hit frequency of 10%, it means you’re likely to land at least a single winning hand from every ten spins made.

While slot volatility has a close connection with RTPs, the casino house edge is the other half of an RTP rate.

The RTP is a number which displays a player’s winning chances on a scale of 100%. The casino house edge is the difference between the RTP rate and 100%.

If a slot game has an RTP of 97%, its house edge is 3%. It indicates how much the house will earn from your possible winning stakes in the long run.

How to Find Slot RTP

The RTP information for slots are often publicly available in online casinos. In some cases, you may also be confused when you find more than a single figure as the RTP rate of a slot. To help you, we’ve outlined the 3 trusted ways to easily find a slot game’s RTP:

  1. Via online search
  2. Via slot demo
  3. Via casino games page

Via Online Search

The easiest way to find the RTP of a slot is to search for it online. Type in the name of the slot, add the term ‘RTP’ and hit the search button.

💡 Casino Pro Tip: To ensure you get accurate information, only look for the information from the official website of the game studio or a trusted casino review site.

Via Slot Demo

Another way to find out a slot’s RTP is to play the demo game. When trying out demo slots in an online casino, you can access all the information about the slot from the help or general information page. Besides the RTP, you can also discover other crucial details like the volatility of the slot, maximum payouts, bankroll, etc.

Via Casino Games Page

When you access the games page on online casinos, you can find details about their featured games by using the search bar of the online casino. As long as a casino features a slot game, there’s always a short description containing information about the slot. You’ll also find a lot of useful information in these descriptions, including the RTP.

Our Verdict

Other than the overall winning frequency, low volatility slots with high RTP have the potential give you a fair return for your bets in the long run. It is a recommended route for Brits who prefer to enjoy the entertaining gambling experience. But remember, as the saying goes, the house always wins.

So, no matter the slot or casino game you play, the final outcome depends on luck. playing the highest RTP online slots has important advantages, and one of them is, of course, the potential of a high payout, but ultimately, it all comes down to luck.

Frequently Asked Questions

Below, our slots expert with 1o+ years of experience in the gambling industry, Tolulope Kehinde, will answer 4 most popular questions about the highest RTP slots in the UK.

What is the average RTP of UK slots?

The average RTP for slots in the UK sits at around 95-96%. Unlike in the past, many high RTP slots are now available in casinos. As a result, the average RTP of these slots keeps increasing.

Is a higher RTP better?

Yes, overall it is, as it potentially gives you more frequent payouts and a better chance of winning over the longer periods of time. However, volatility is another important factor that comes into play, so we recommend you go with low volatility slots with high RTP.

Does a high RTP guarantee a high payout?

No. A high RTP slot does not guarantee you a high payout. Regardless of the RTP or volatility, casino winnings depend solely on luck, so the final outcome relies on the result of the RNG software.

What high RTP slot should I play in the UK?

Selecting the best high RTP slot depends on a lot of factors, including your individual preferences. Hence, there are bound to be some differences when players select their favourite slots. Our top recommendations are Blood Suckers, Ooh Ahh Dracula, 1429 Uncharted Seas, Ugga Bugga, and White Rabbit Megaways from Big Time Gaming.

What are some of the highest RTP slots that Pragmatic Play offers?

Pragmatic Play is among the top game studios known for producing some of the best high RTP slots available in the UK. The highest RTP slots from the company are Hercules of Pegasus (96.5%), Return of the Dead (96.71%), etc.

What is the highest RTP slot on MrQ?

The slot with the highest RTP on MrQ is 1429 Uncharted Seas which has an RTP of 98.50%. This means that for every £10 bet, the average return to player is £9.85 based on long periods of play.

Tolulope Kehinde - Expert Casino Author

Tolulope Kehinde

Verified Author

Online Bingo & Slot Expert

Tolulope Kehinde is online bingo and slots expert at CasinoSherlock. With five years as a writer and researcher in the online gambling, she is a true pioneer in the industry. Tolulope's insights and expertise are invaluable in providing avid casino players with in-depth and up-to-date information on all things related to online slots, bingo games and payment methods.

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