Top 10 Highest Paying Slots UK Ranked by JohnSlots

With thousands of slot games readily available to play, it can feel overwhelming to know whether you’re picking the right one. We’ve given you a helping hand and found the top ten highest-paying slots in the UK. The usual slots we review tend to have an RTP percentage around 96-97%. The slots in this list take it to the next level with an RTP of up to 99.03%!

What is RTP?

RTP (Return To Player) is calculated in the form of a percentage and calculates all wagered money that a slot machine will pay back to players over time. If a slot machine has an RTP of 98%, on average, expect to see typical returns of 98 units for every 100 units wagered.

The recommended RTP to look for in any online slot game is a minimum of 96%, a level where you can expect a reasonable return on your stake.

💡 Keep in mind the return is calculated on long-term play. Shorter game sessions might result in a different outcome.

Read on to find out more about which slots hold the title for highest RTP:

Ugga Bugga

Ugga Bugga is turning the traditional slots format on its head with a whole new reel set-up. This game, released in 2013 by Playtech, has solidified its reputation as the slot with the highest RTP of 99.03%.

The game pays less attention to fancy details like bonus features and high-quality graphics and focuses primarily on returning winnings to users. However, expect to find a low volatility on Ugga Bugga, meaning that while winnings may be frequent, they’re going to be on the lower end of the scale.

Book of 99

If Greek Mythology and high RTP are your jam, then this will be the slot game for you. The powerhouse Relax Gaming released Book of 99 in 2021 and has become a go-to choice for those seeking a thrilling gaming experience.

With every winning payline, you’ll see the meter on the left side of the screen rise. Once you reach the top, you’re really in for a surprise. The combination of an RTP of 99% and high volatility will mean that you can expect a fair frequency of some pretty impressive payouts.

Mega Joker

This is the first NetEnt game on this list, but don’t expect it to be the last. NetEnt released Mega Joker back in 2013, attempting, pretty successfully in my opinion, to recreate the feel of a classic fruit slot.

The 3×3 reel, featuring lemons and cherries, might evoke all sorts of nostalgia, but it’s the impressive 99% RTP that’s the real appeal here. This slot has a high volatility and a progressive jackpot feature, meaning your excitement will grow as you watch the jackpot rise.

Ooh Aah Dracula

You may just find yourself oohing and aahing at this exciting vampire-themed slot. Barcrest isn’t a name you’ll hear particularly regularly in the iGaming scene, but they really put their all into producing a spookily chilling slot game here.

Ooh Aah Dracula‘s RTP follows suit with 99%, but it is the first medium volatility option on the list. This means your payouts will typically be frequent and medium-sized, the perfect balance. If this hasn’t excited you enough, the soundtrack will definitely be the selling point here.

Jackpot 6000

Jackpot 6000 shares similar qualities to Mega Joker, as NetEnt is the creator behind both of these slot games. However, Jackpot 6000 has stripped back the style to resemble a traditional, simpler slot machine, without the progressive jackpot.

This game has a slightly lower RTP of 98.86%, but it still has high volatility, so you can expect numerous opportunities for substantial payouts.

1429 Uncharted Seas

Thunderkick has created this visually stunning sea monster-themed slot game, promising hours of entertainment. This game is full of bonus features that can trigger free spins, even up to 50 if you land five compasses.

The RTP is 98.9% and is labelled as a low volatility game, so expect plenty of small wins sailing your way. You’ll be in safe hands exploring the unknown ocean on 1429 Uncharted Seas.

The Catfather

The Godfather movie meets the crazy world of cats. Cat gangsters are taking over the world in this Pragmatic Play slot game, holding a mouse hostage as their scatter symbol bonus. The little mouse will grant you up to 25 free spins and a payout of 20x your total wager.

This fun, albeit slightly silly, slot game offers entertainment and steady wins with medium volatility. For those crazy cat people, The Catfather is the perfect slot for you.

Jokerizer

Ever wanted to go to the theme park with the Joker? Yggdrasil’s slot game offers you the chance to ride the Ferris wheel with one of the greatest supervillains. This 3×5 slot machine follows a traditional style as you’ll likely recognise the lemons and number 7s from old-school slots.

Alongside the RTP of 98%, you can enjoy two bonus modes for each style of game. The Mystery Win offers the potential to hit the 6,000-coin jackpot, while the Jokerizer mode, activated by hitting the Joker button, increases the chances of a payout.

Rainbow Riches Pick n Mix

This Irish-themed slot game is brought to life by Barcrest, now owned by Light & Wonder, a firm that is one of the longest-standing creators of slot games. Their outstanding reputation hasn’t come from nowhere, as Rainbow Riches Pick n Mix demonstrates the high-quality, engaging slots they create.

This slot game offers three different RTP percentages, with the premium play level providing access to 98%. You can expect a play experience that falls somewhere between medium and high volatility.

Blood Suckers

NetEnt concludes the top 10 with another vampire-themed slot game, but this one is a little bit more spine-chilling. If you aren’t a lover of gore, Blood Suckers may not be for you as you drive stakes through vampire hearts and open coffins. NetEnt have brought their graphics to the next level with this slot.

The game offers plenty of bonus features alongside the 98% RTP. While it has low volatility, Blood Suckers remains popular as it is an all-time favourite for horror lovers.

Conclusion – Which One Should You Pick?

Narrowing the selection down to ten of the top playing slots can still leave an overwhelming choice. Sometimes it’s okay to judge a book by its cover, so we recommend choosing based on a theme preference or whichever one takes your fancy in the moment.

There are free demo versions of each game which will give you the chance to have a few spins to get a feel for the game, especially if you’re not used to playing games with such a high RTP. This list offers a range of low, medium, and high volatility options. However, we typically advise starting with the low-to-medium end of the spectrum. This approach is more likely to give you some early wins. If your luck’s in, you can then gradually increase your bets without risking your bankroll.

Choosing slots with a higher RTP percentage is an excellent way of switching up your usual gameplay, and getting that victorious feeling of seeing your wager (and, fingers-crossed, some profit) returned to you