Best paying online casino slots (highest RTP)

Modified: 12/01/2019

Casinomucho presents collection of best payout slots online for UK players! Compare highest paying slot machines, choose online games with excellent RTP and favourable odds. Slots are the most popular choice among British casino enthusiasts. Prepare yourself for robust jackpots and chance of winning prize on each spin. 

Best paying online UK slots boast highest RTP with over 97% payout percentage. We deeply analyzed that matter, beneath find casinos with reliable payouts & high RTP games that suits you!

Best payout online casino UK

Rank Casino Site Rating Bonus Key Features play
5.0 rating

3349 players registered

Casino Heroes


600 Extra Spins

18+. T&Cs apply.
  • Unique loyalty program
  • Payouts within a few hours
  • Great selection of games
5.0 rating

3366 players registered

Kaiser Slots


10 Extra Spins

18+. T&Cs apply.
  • Play on mobile phone
  • Jackpot slots available
  • Top software brands
5.0 rating

646 players registered

Winstar Casino


100 Extra Spins

18+. T&Cs apply.
  • 24/7 HD live streams
  • Modern, engaging interface
  • Generous payout limits
5.0 rating

2601 players registered

SlotsMillion Casino


100 Extra Spins

18+. T&Cs apply.
  • Best selection of slots
  • Virtual Reality games
  • Extra rewards program
5.0 rating

1598 players registered

PlayFrank Casino


50 Extra Spins

18+. T&Cs apply.
  • Daily challenges, and loyalty rewards
  • Extensive games portfolio
  • Bonuses for new and existing players
5.0 rating

1564 players registered

Casumo Casino


20 Spins No Deposit

18+. T&Cs apply.
  • Simple 2-step registration
  • Multiple games providers
  • Weekly promotions
5.0 rating

1173 players registered

Cashmio Casino


70 Extra Spins

18+. T&Cs apply.
  • 20 extra spins upon registration
  • Fantastic mobile design
  • Daily missions with rewards
5.0 rating

2006 players registered

Wixtars Casino


50 Extra Spins

18+. T&Cs apply.
  • One of the best loyalty programs
  • Genereous welcome bonus
  • Extremely fast withdrawals
5.0 rating

697 players registered



50 Extra Spins

18+. T&Cs apply.
  • Rich selection of classic slots
  • Safe and reliable operator
  • Premium VIP offer for loyal players
5.0 rating

1717 players registered

Fun Casino


111 Extra Spins

18+. T&Cs apply.
  • Huge welcome bonus
  • 24 hours cashouts
  • High number of jackpot slots

Playing best payout slot games online should be first and foremost about having fun. However, you can also win money! Top notch online casino payouts range between 96% – 98%.

Register, deposit and play in online casino with publicly visible payout %. Websites presenting wide range of statistics, including payout rates encourage players with transparency and reliable service.

Which casino online has best paying slots?

When it comes to UK gambling market, we recommend two casinos with highest slot payouts – CASINO HEROES (slots RTP – 96.80%, amazing selection of games, gamification system) and CASUMO (slots RTP 96.83%, superb welcome bonus, user friendly website).

Best payout online slots (UK) – Top 10 slot games

What are the best paying slots games? RTP describes percentage of wagered money paid back to the player. New UK slot sites show average payout percentage around 95%, with some games over 97%.

RTP varies per individual gambling session, since it is not calculated per player’s game. Return to player bases on estimated long-term payouts of the slot in general. 

If you play slot with RTP of 95%, expect to get £95 back for every £100 that you wagered. Return to player is always determined over the time, thus all variances (highs and lows) are evened out [1].

Check RTP of online slot to find out how well it rates on the Return To Player scale (higher RTP, better deal for the player – more favourable odds):

  • 92% or less: low RTP
  • 92% and 94%: acceptable RTP
  • 94% and 96%: great RTP
  • 96% and 97%: excellent RTP
  • higher than 97%: amazing RTP

We have prepared selection of highest paying slots at best payout online casinos in UK:

1. Mega Joker: up to 99%

Highest RTP slot from NetEnt with a chance to win a million jackpot.


2. Book of Dead: 97.21%

Adventure game (high variance) with an Egyptian theme from Play’N GO.


3. Guns N ‘Roses: 97%

Slot inspired by famous rock band, where music adds extra boost to the theme.


4. 1429 Uncharted Seas: 98.6%

One of the best Thunderkick slots on the UK market. Explore the sea with extra spins.


5. Blood Suckers: 98%

Romantic vampire slot with 25 win lines is one of the most known NetEnt’s titles.


6. Esqueleto Explosivo: 97.6%

Exploding Mexican skulls and Golden Elvis symbol in favourite Thunderkick slot.


7. Dazzle Me: 96,9%

Extremely popular Net Entertainment slot with 5 reels and 76 win lines.


8. Immortal Romance: 96.83% 

Another vampire theme, check Microgaming unique Chamber of spins feature.


9. Jak Hammer 2: 97.10%

Comic book style crime slot from NetEnt. Boasts 99 win lines with plenty of winning combinations.


10. Jackpot 6000: up to 98.8%

Old-school slot machine from NetEnt. Trigger Supermeter mode with maximum 10 coins.


Highest casino slot payouts in the history

Here we have gathered all jackpot slots which reached at least million pound payout. Highest jackpot win ever made in history has been registered at Mega Moolah slot. New world record has been set with unbelievable win of £13,2 million (Eur17.89m).

  • Mega Fortune – £ 17,891,700
  • Mega Moolah – £ 13,230,100
  • Mega Moolah Isis – £ 13,130,200
  • Arabian Nights – £ 8,636,041
  • Jackpot Giant – £ 5,890,360

No payout percentages on individual gaming sessions

Consider a payout percentage of 87%. If this were to be calculated on individual gaming sessions, then everyone would lose 13% of their money each time they played. It would be impossible to claim a win for a game since the machines would always be programmed to take away from the clients and give back less to each individual.

There would therefore be no excitement when playing slots since no one wants to lose money without the hope of winning big. Even with the payout percentage being generalized for the machine, a player would still lose some money no matter how many spins they played.

Look at the highest slot payout percentage

In most of the top online casinos, you have online casinos payout rates indicated on the home menu. This is usually in accordance to eCogra, certifying agency, which requires each and every online casino to be transparent with their services. Awareness of the slot RTP (Return to Player), associated with certain game, lead players to increase of their stake [2].

Can online casinos alter the slot payout rate?

If any online casino is discovered to have altered the percentage payout rates of any machine that runs in their online casino, they will always have their licenses stripped off until they have fixed the problem. Should your complaint not being resolved in a reasonable timescale, consider referring to Gambling Commissioner [3] or independent auditor.

Like stated before, eCogra will have to run an audit on the casino website after which it will certify if it is safe for the site to resume service.

What companies carry slots audits?

eCogra has been just one of the many online casino auditing companies in the world. In 1993, Technical Systems Testing Certified was founded with the aim of providing a large range of testing and consulting services to the online casinos.

There are also government agencies located in Antigua and Barbuda, Isle of Man, Kahnawake (which is very popular in Australia) and the Lotteries and Gaming Authority of Malta – MGA.

All these companies are involved in either licensing or auditing the various online casinos to ensure that you have had very fast, fair and accurate percentage payout rates.

Discover best online slot games to win

At a number of online casinos, players also get a chance to participate in tournaments of online slots. Slots tournaments involve a large number of players and often come with huge prize money.

They are fun to play and can also change a players life in an instant, should he win. Best online slots operator should tick a number of boxes for the gamer – from the range of games and jackpots on offer to the practicalities of managing a gaming account like banking options and sign-up bonuses.

Online slots powered by software and random number generators can easily be weighted more or less in favor of the player. Credibility and trust should be keywords for anyone searching for the best UK slots.

Not all free slots providers were created equal, and there are some clear choices that stand head and shoulders above the rest. Unfortunately, the days of judging the quality and reliability of a website based on its graphics are over, and any charlatan with a few spare Pounds can easily throw together a rigged casino.

For those contemplating playing online slots for money, it is imperative to take into account the views and experiences of players past through reading and comparing reviews into different online slots .

If you love to play casino games but don’t have the time or resources to travel to a big casino hotel, you can still enjoy high quality games through the UK online casinos. Play first rate slots, card games, and more on your computer at home or your mobile phone.

Recognizing top slots machines quality

Our reviews and ratings are designed to give players a better insight into the best options available in the online slots markets, to help ensure a more enjoyable (and hopefully lucrative) gaming experience.

Compiled by expert researchers in addition to input from previous users of top paying slots, this kind of due diligence is recommended for anyone serious about getting the most from their online gaming.

Depending on the slot provider you choose, there will undoubtedly be an array of casino bonuses and jackpot options to consider.

Certain casino offer no deposit bonus. While the size of the initial sign-up bonus should always be an important factor, it is nevertheless important to remember the long-game, and to look for positive features of best paying online slots for long-term play beyond the initial welcome bonus.

The size and nature of the jackpots on offer will also be an important deciding factor, and gamers should decide whether they want to opt for the biggest, progressive jackpots across the larger websites, or the smaller but arguably more winnable prizes of single jackpots.

In a game that relies on chance to such a degree, one of the biggest tactical decisions you can get right early on is the choice of provider, and those that take care to learn about the options can expect to walk away in the most advantageous position.

Choose best rated online slots UK

One of the biggest questions facing any new gamer is which slots provider to choose, and a wrong turn at this early stage can end up wasting both time and money on an inferior platform.

Fortunately, the range of choice available for gamers worldwide is substantial, and those that are looking to find the optimum provider for their online slots gaming needs will need to embrace a research and discovery process before settling on their final choice.

For some gamers, it might be a case of finding one stand-out provider, whereas others might like to diversify their online slots play across games and casinos.

However, if you intend to structure your slots play, you need to know what makes a good provider, and what features of slots you should look out for to make sure you’re choosing wisely.

What makes a good slots provider?

There are a number of potential criteria that gamers will use when choosing slots, and depending on what you’re looking for from your gaming experience, some factors will be more influential than others.

For some, the size of the prizes will be the most decisive factor, while healthy sign-up bonuses will help sweeten any deal. Other gamers will prefer the wide range of games on offer, or will choose on the basis of the best paying games they can find.

Whatever the most prevalent issues, it pays to compare slot providers and to read reviews and ratings from other users to help influence your judgment.

What to watch out for

Regardless of the service levels you’re looking for, all gamers should take care to look for legitimate, credible providers for the best gaming experience. Choosing the wrong provider can spoil the fun at best, and lead to serious financial loss and fraud at worst, and any online slots provider should be appropriately regulated in its territory.

Look for the approval of an authority or regulatory body before signing up and handing over your payment details – any badge of authority and credibility you can find will help make sure you get the most out of your time playing at new online slots.

Finding the best slot bonuses

The best approach to choosing an online slots casino that ticks all the boxes is one that is research heavy, and takes into account the reviews and ratings of other casino slot users.

The more time and energy you devote to sifting through the reviews and online comparisons, the greater the chances of finding a high-paying, fast withdrawal casino with online slots.

What makes highest RTP slots outstanding?

Not all of online casinos and gambling websites can be considered good and reputable. Naturally, what one gamer looks for from his slot play will be different to the next, but it is nonetheless essential to make sure that you look at a few key criteria when settling on the online UK slots with best payouts.

Generally, players look to narrow down options to one or two casinos they regularly use, simply for the ease and convenience of managing just one or two accounts.

That makes it all the more important to choose slots that are right for you, both in terms of the gaming experience they offer and the potential for winning on that successful spin.


Many online slots enthusiasts will be initially drawn to the big names in the industry, just because they are more likely to be familiar with the brand and the fact that they exist. While some of the big names enjoy their position from merit, it’s important to research all the options open to you across the board to find the best provider for your needs.

Those that are more instantly recognizable do have more substantial marketing budgets, but that doesn’t necessarily confirm them as serious contenders for your game time. Think beyond the name and look at the operator underneath – you want to find the best slots provider on merit and reputation rather than ubiquity.

Range of games

Having access to a wider range of online slots makes for a more engaging slot playing experience.

While its common for gamers to have a favorite selection of games that they enjoy more than all others, there is a need for variety in terms of presenting new challenges and keeping the game interesting.

Try to choose an online slots casino that offers as wide as possible a range of game styles and prizes, to ensure you can carry on spinning the slots until your heart is content.

After all, there is friction in the switching process if you’re not happy with your online slots platform, so it pays to choose a wide variety of games from the off so you’re happy with your decision for as long as possible.


The best online slots to play are often featured on the best paying websites. Perhaps unsurprisingly, most gamers prefer to play slots that pay generously, thus they can benefit financially from their gameplay. The best paying casinos and higher paying games in terms of payout frequency can make a real difference on the results you can expect to achieve. It is worth further research into casino reviews and ratings to find more reliable providers.


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User ratings

  • Licenced and approved list of best online slot websites

    I always tend to play my favurite slots on new websites with welcome bonuses. From the list above I can recommed Casino heroes, with their intriguing gamification and rewards system. Lots of hours played sometimes won, sometimes lost but still continue playing there. One of the biggest portfolio of online slots in UK market, fully UKGC licenced casino, fast payouts, variety of payment options + excellent customer support. Top notch!

    DrewPaul00 -
    5.0 rating
    5 / 5
  • Online slots with best payouts in UK- Mega Joker and Book of dead

    You can find here so many best slot machines and the classics such as Gonzo's quest that I really love. Playfrank casino and SlotsMillion are one my favurites casino sites with highest paying games!

    MorK -
    5.0 rating
    5 / 5
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