illustration

Best Payout Slots

By Marcus Lawrence on

TopRatedCasinos.co.uk is dedicated to helping customers find the best place to play online. Your safety and well-being is a priority, which is why all of our expert casino reviews are 100% honest and unbiased, and we highlight the key terms and conditions of every casino bonus we advertise. Whilst we accept commission from the casinos on our list of recommendations, and this may affect where they’re positioned on our lists, we only recommend casinos that we truly believe are safe and fair. Of course, we can’t rate and review every casino site, but we do make sure that only the best UK-licensed casinos make it onto our lists.

TopRatedCasinos.co.uk is dedicated to helping customers find the best place to play online. Your safety and well-being is a priority, which is why all of our expert casino reviews are 100% honest and unbiased, and we highlight the key terms and conditions of every casino bonus we advertise. Whilst we accept commission from the casinos on our list of recommendations, and this may affect where they’re positioned on our lists, we only recommend casinos that we truly believe are safe and fair. Of course, we can’t rate and review every casino site, but we do make sure that only the best UK-licensed casinos make it onto our lists.

When it comes to online casinos, slots are known to offer the highest potential winnings of all games. We’ve lined up a list of the very best slots to play for high payout percentages—otherwise known as high RTP—so you can easily locate the most generous games on the market. 

 

+ Show more - Show less

A few lucky players turn low-stakes spins into big wins, but progressive jackpot games aren’t the highest paying slots by frequency. 

We’ve also covered exactly what it is that makes a high paying slot, as well as how to identify them so that you can easily find and enjoy the highest payout slots at online casinos.

Want to try your luck on high-paying slots? Look no further than our list of the UK’s best slot sites.

80 Wager Free Spins on 1st Deposit

  • Super Fast Payouts
  • No Wagering Required
50 Free Spins on first deposit (on Rich Wilde and the Book of Dead). Also, after the first deposit the player can claim an additional 30 Free Spins by visiting the Kicker Section. So the player can receive a total of up to 80 free spins. Please refer to the landing page for all the details. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

RTP Slot Payout Percentages Explained

The return to player (RTP) ratio is the percentage of all money wagered on a slot game that is paid back out to players. The higher the RTP, the more often the slot pays out on average. So, if a game has an RTP of 96%, it will theoretically pay out 96% of all wagers over the course of its lifetime.
However, RTP is very rarely reflected in a typical play session. The average is calculated based on the wagers all players put into a game over hundreds of thousands to millions of spins. This means you can easily be winning back more or less than the RTP at any one time. For this reason, it’s best to use the RTP as a rough indicator of how a slot will play out, and you shouldn’t be surprised if your actual returns are some way off.

Another way to think of RTP is in terms of the house edge, which refers to the advantage the casino has over the player in any casino game. This is a necessary feature if the casino is going to make a profit. The house edge percentage is simply what’s leftover from the RTP, so the house edge for a 96% RTP slots game would be 4%.

Best RTP Video Slots

Here is a selection of the highest RTP slots you can play at UK online casinos.

Goblin’s Cave — 99.32% RTP

Goblin’s Cave, from Playtech, offers the highest RTP on the market — an incredible 99.32% when you bet the maximum amount. This 3-reel, three payline game also has a hold feature where, after each new spin, you get to choose to hold symbols for the next round and get a better chance of landing a win. One thing to keep in mind is that the maximum bet requirement means that only those with higher bankrolls will be able to enjoy the maximum RTP.

100% up to £100 + 100 Spins

  • £10K Prize Draw
  • 400+ Casino Games
New players only. Min deposit £20, Max bonus £100. 50x WR, 100 Free Spins - 10 batches of 10 Free Spins Daily - No WR - Max Win £10 per batch. T&Cs Apply 18+ 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Ugga Bugga — 99.07%

Also developed by Playtech, a 99.07% RTP makes Ugga Bugga one of the highest payout slots you can play at online casinos. This game is very similar to Goblin’s Cave and also has a hold feature, adding a tactical element you don’t usually get with slots. Line up three wild symbols and you’ll land the jackpot which pays out at 1,000 times your bet.

Up To £500 + 10% Cashback

  • Huge Slot Jackpots
  • Live Dealers
Min deposit £20 max bonus amount £500. First deposit: 100% up to £200. Second deposit: 50% up to £300. Wagering 40x for each bonus. Game weighting applies. Cashback: 5% cashback on first and all other deposits during week 1, 10% cashback on all additional deposits taking place in week 2 only. Bonus betting limits: slots - £5 all other games – 10% of bonus amount 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Ocean Princess — 99.07%

Playtech holds the distinction of having developed the top three slots by RTP on the market, with Ocean Princess completing the triumvirate with an RTP of 99.07% when you play the max bet. The maximum win of 1,000 coins if awarded when three Crown wilds appear on any of the enabled paylines.

100% Up To £300

  • Big UK Brand Name
  • Great Live Casino Offering
New Customers Only. 100% Deposit Match up to £300. Min deposit £10. 50x Wagering applies to the Bonus + Deposit amount, playable on selected slots only. Bonuses must be accepted within 72 hours and are valid for 30 days and wagering requirement must be completed in this time. Bonus amount can't be withdrawn. Max bet restrictions apply. Not all games contribute equally to wagering requirements. Deposits made with Neteller and Skrill are not valid for this promotion. 18+ begambleaware.org. Full T&C apply. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Ooh Aah Dracula — 99%

This game has a base RTP of 96% which shoots up to 99% when you play the Big Bet mode, making this Barcrest title one of the best payout online slots available. There are two high roller options: play 5 spins for 20 coins and land the Graveyard Bonus if free spins are activated, or play 5 spins for 30 coins to be in with a chance of activating the Super Graveyard Bonus feature.

80 Wager Free Spins on 1st Deposit

  • Super Fast Payouts
  • No Wagering Required
50 Free Spins on first deposit (on Rich Wilde and the Book of Dead). Also, after the first deposit the player can claim an additional 30 Free Spins by visiting the Kicker Section. So the player can receive a total of up to 80 free spins. Please refer to the landing page for all the details. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Tropic Reels — 98.95%

Cementing Playtech’s reputation as one of the most generous slots developers, Tropic Reels comes loaded with the developer’s hold feature and a very high RTP of 98.95%. The tiger wild is the highest paying symbol in this jungle-themed game — land three on any payline and you’ll bag the max win of x2,500 if you’re playing on the maximum bet.

Up To £500 + 10% Cashback

  • Huge Slot Jackpots
  • Live Dealers
Min deposit £20 max bonus amount £500. First deposit: 100% up to £200. Second deposit: 50% up to £300. Wagering 40x for each bonus. Game weighting applies. Cashback: 5% cashback on first and all other deposits during week 1, 10% cashback on all additional deposits taking place in week 2 only. Bonus betting limits: slots - £5 all other games – 10% of bonus amount 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Jackpot 6000 — 98.9%

Jackpot 6000 is a NetEnt slot in which the RTP can reach up to 98.9%. This game is based on classic arcade slots but, thanks to the Supermeter mode, it’s far from your standard 3-reel game. This option is activated each time you land a win when betting ten coins, offering enhanced bonus features as well as the chance to reach the maximum RTP of 98.9%.

Unlock up to £100 +20 Free Spins

  • Mobile Casino Of The Year
  • Over 500 Slots
Free spins - no deposit required & new players only. Claim within 3 days of registration & 3 day expiry. Free spins worth £0.10 each on Book of Dead, winnings paid as cash. Deposit offers available across any two deposits. Both expire 7 days after registration & have 7 days to wager once claimed. Deposit £10, £25 or £50+ & wager 35x for a cash reward. Only cash stakes qualify & wagering contributions vary. 5 free spins on Book of Dead with each qualifying deposit, 3 day expiry. Click here for full T&Cs 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

1429 Uncharted Seas — 98.5%

Created by Thunderkick, this 5-reel, 25 payline slot has an incredible 98.5% RTP, putting it among the best payout online slots in the UK. You don’t need to bet the maximum amount to benefit from this great payout rate, meaning Uncharted Seas is a great slot for beginners, casual players, and high rollers alike. With expanding wilds and a free spins bonus round, this title offers plenty of fun for slots enthusiasts.

100% up to £100 + 100 Spins

  • £10K Prize Draw
  • 400+ Casino Games
New players only. Min deposit £20, Max bonus £100. 50x WR, 100 Free Spins - 10 batches of 10 Free Spins Daily - No WR - Max Win £10 per batch. T&Cs Apply 18+ 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Joker’s Strike — 98.11%

Quickspin’s Joker Strike is a great slot for high-rollers, with a collection of features that make this 98.11% RTP slot a tantalising proposition. Its 5×3 reel setup is encircled by an outer wheel which spins for extra prize opportunities, and new symbols appear on the grid each time you land on one. Its Hi Roller mode offers bigger prizes for bigger bets, and that’s not all. If you bet £20 you’ll be guaranteed a wild from every five spins, and £30 stakes will land a wild on both the reels and the bonus wheel for a double chance game. £50 stakes, meanwhile, receive extra wilds and strikes, and an additional marker spinning both ways on the bonus wheel, meaning you’ll have heightened chances of landing the eponymous joker strike feature.

100% Up To £300

  • Big UK Brand Name
  • Great Live Casino Offering
New Customers Only. 100% Deposit Match up to £300. Min deposit £10. 50x Wagering applies to the Bonus + Deposit amount, playable on selected slots only. Bonuses must be accepted within 72 hours and are valid for 30 days and wagering requirement must be completed in this time. Bonus amount can't be withdrawn. Max bet restrictions apply. Not all games contribute equally to wagering requirements. Deposits made with Neteller and Skrill are not valid for this promotion. 18+ begambleaware.org. Full T&C apply. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Jokerizer 98%

Jokerizer by Yggdrasil is another slot that offers an increased RTP in high roller mode. This Jokerizer mode, in which the RTP increases to 98%, is activated whenever you land a win. This mode does cost 20 coins per spin, however, so you’ll need a sizeable bankroll to activate the maximum payout percentage.

Rainbow Riches Pick n Mix 98%

This sequel to Barcrest’s Rainbow Riches introduces new bonus features and the Big Bet feature. As in Ooh Ahh Dracula, playing in high roller mode increases the RTP to 98% and gives you the chance to win better bonuses with increased prizes. In Rainbow Riches Pick n Mix, you can pick up to three out of the five bonus features, so this colourful slot promises lots of entertainment.

150% Up To £150

  • Full PayPal Support
  • Huge Brand!
New accounts only. Min. £10 deposit, debit/credit card and PayPal only. 50x wagering, game contributions vary, max. stake applies, 7 day expiry. See full terms. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Hot Ink — 97.50%

This tattooist-themed slot is a fantastic, high-RTP option with over 1,024 winning paylines. Playing Hot Ink is simple: all you need to do is select how many coins to wager, and you’re good to go. For a fee, you can respin individual reels if you’re just shy of a winner, and a couple of bonus rounds are offered, too. If you score three or more tattoo bonus symbols, you’ll activate a minigame in which you select tattoos with the chance to win some cash — if you complete the set, you’ll also secure a 2x multiplier and 10 free spins. Anyone lucky enough to land three or more Pisces symbols boosts your chances of success even further, with 20 free spins, another 2x multiplier, and a retrigger feature.

150% Up To £150

  • Full PayPal Support
  • Huge Brand!
New accounts only. Min. £10 deposit, debit/credit card and PayPal only. 50x wagering, game contributions vary, max. stake applies, 7 day expiry. See full terms. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

What Makes a High Paying Slot Game?

The return to player (RTP) is the percentage of all money wagered on a slot game that is paid out back to players. The higher the RTP, the more often the slot pays out on average. So if a game has an RTP of 96%, you could, in theory, expect to get back 96p of every £1 you wager over an extended period of play.

However, RTP isn’t quite as simple as that. The average is calculated based on the wagers all players put into a game over an infinite number of spins. This means you can easily be winning back more or less than the RTP at any one time. For this reason, it’s best to use the RTP as a rough estimate of what you could win, and don’t be surprised if your actual returns are some way off.

Most online slots have an RTP of 94% to 96%, so any game with an RTP of 97% or more would be considered a high payout slot. However, these RTPs aren’t always set in stone – some slots’ RTPs change depending on how much you wager. For example, in certain titles, you have to bet the maximum stake with each spin in order to activate the highest possible RTP.

As a general rule, it’s a good idea to select a slot with a high payout percentage. Most online slots have an RTP of 94% to 96%, so any game with an RTP of 97% or more could be considered among the best paying online slots. However, these RTPs aren’t always set in stone – some slots’ RTPs change depending on how much you wager. For example, with certain titles, you have to bet the maximum stake with each spin in order to activate the highest possible RTP.

When choosing the best slot sites for winning, it’s a good idea to check the RTPs of their games before you sign up. UK-licensed casinos are legally required to clearly state this information, making it easy to pinpoint which ones have the best online slots payout percentage.

How to Find a Slot Game’s RTP

Luckily, finding out the RTP of online slots is relatively easy. All licensed UK casinos and software developers must make game RTPs easily accessible in order to ensure transparent gaming. Once you load up a slot, simply click on the ‘i’ or ‘?’ icon to find the RTP either stated alone or as part of the slot’s paytable.

Slot Variance/Volatility Explained

Another important element to consider when taking a look at low and high RTP slots is variance, or volatility, which refers to the size and frequency of online slot payouts. Low variance means small prizes that payout often, while high variance slots payout less frequently are more likely to hand out sizeable returns when they do. These high variance titles could be regarded as the best slot games for those who have larger bankrolls to play with, those who like to hit the slots for occasional sessions, or simply enjoy the buzz of playing at higher risk for potentially higher rewards. On the flip side, low variance games are popular with players who have smaller bankrolls or who like to be able to play extended, lower risk sessions.

Most progressive slots are high variance, so you’re likely to end up waiting longer for a win than with other, low variance games.

Progressive Jackpots

If progressive jackpots are famous for their life-changing payouts, then the titles funding them must be the best paying slots, right? Well, quite possibly, but only if you win the elusive jackpot, which is easier said than done.

Let’s look at an example. Microgaming’s Mega Moolah holds the title for the biggest ever online slot payout — one very lucky player bagged more than £16,000,000 on this game. You might think that this makes Mega Moolah the ‘highest paying slot’, but this title has an RTP of just 88.12%. That’s pretty low on the RTP spectrum. If you get lucky enough to land a rare win, it’s likely to be a bigger prize. However, on average you’re far less likely to land some returns on Mega Moolah than on the best RTP slots.

A progressive jackpot can be standalone, which means it is individual to one game or pooled between games. In these cases, wagers on multiple titles contribute to the prize fund, so top prizes tend to grow larger and faster.

Best RTP Progressive Jackpot Slots

Looking for the best of both worlds? We’ve picked out some of the best slots to play if you’re looking for a progressive jackpot and high RTP.

Mega Joker 99%

NetEnt’s classic slot Mega Joker doesn’t just give you the chance to win a progressive jackpot — with a payout rate of 99%, it’s one of the highest RTP slots. Unlike some progressive games, you don’t need to place the max bet to have a shot at the jackpot, though your chances do improve the more you bet. You can either play on the bottom set of reels, or try out the ‘supermeter’ mode to go for bigger prizes.

100% Match Bonus up to £300 + 50 Spins

  • Big Range of Games
  • Great Graphics
1st dep. of £20-£300, max bonus £300 on selected slots, 50x wagering on the sum of deposit & bonus applies. Max convertible 5x bonus amount received and T&C's Apply. 18+ 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Cosmic Fortune 96.9%

NetEnt’s 5-reel, 3-line Cosmic Fortune is one of the best payout progressive slots thanks to its 96.9% payback percentage. There are five jackpots in total, three of which are progressive, as well as two bonus games and NetEnt’s Avalanche Feature in this action-packed title. The Jackpot Game is triggered by the Free Falls Bonus Game, and you’ll need to land three marbles in the Jackpot Collector Cup for the top prize.

100% Up To £250

  • Six Figure Jackpots
  • Slots Specialist
For every £1 you deposit, Dream Jackpot will match it (up to a max of £250). 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Gold Rally 96.7%

This 3-reel slot from Playtech has a minimum RTP of 94.71%, but hit max bet and it’ll shoot up to a very respectable 96.7%. You’ll need to bet max and hit the nine scatter symbols in order to land the progressive jackpot but, with a prize pool that hits £1 million fairly regularly, the potential rewards can be lucrative. Gold Rally is a fairly simple slot—you won’t find any free spins or wilds—but there is a bonus game that can land you an increased payout.

£100 Bonus + 200 Spins

  • Withdrawals Within Minutes
  • Superb Live Casino Offering
Minimum deposit of £10 , x30 wagering, game weighting applies. 200 Free Spins available after first deposit. The number of free spins available will vary depending on first deposit amount. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Mega Fortune 96.6%

Another NetEnt entry, Mega Fortune held the world record for the biggest online slot payout previous to Mega Moolah, paying out over £13 million to one fortunate spinner. This slot also has a very generous RTP of 96.6%, making it one of the most popular progressive slots on the market. On top of this, there are two local jackpots, free spins, wilds and a bonus game, making for exciting gameplay.

Unlock up to £100 +20 Free Spins

  • Mobile Casino Of The Year
  • Over 500 Slots
Free spins - no deposit required & new players only. Claim within 3 days of registration & 3 day expiry. Free spins worth £0.10 each on Book of Dead, winnings paid as cash. Deposit offers available across any two deposits. Both expire 7 days after registration & have 7 days to wager once claimed. Deposit £10, £25 or £50+ & wager 35x for a cash reward. Only cash stakes qualify & wagering contributions vary. 5 free spins on Book of Dead with each qualifying deposit, 3 day expiry. Click here for full T&Cs 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Divine Fortune 96.59%

Coming in just behind with an RTP of 96.59% is NetEnt’s Divine Fortune slot. Set in Ancient Greece, this slot is packed full of exciting bonuses, including Falling Wild Re-spins, a Wild on Wild feature and the Jackpot Bonus game. The Jackpot Bonus game offers the chance to win three different jackpots, including the progressive Mega Jackpot.

80 Wager Free Spins on 1st Deposit

  • Super Fast Payouts
  • No Wagering Required
50 Free Spins on first deposit (on Rich Wilde and the Book of Dead). Also, after the first deposit the player can claim an additional 30 Free Spins by visiting the Kicker Section. So the player can receive a total of up to 80 free spins. Please refer to the landing page for all the details. 18+ Please Gamble Responsibly. Click 'Claim Bonus' to view the full terms and conditions.

Top 5 NetEnt Payout Slots

Founded in Sweden in 1996, NetEnt has produced some of the world’s most popular and best paying slots. Let’s take a quick look at five of their best payout online slots.

Mega Joker – 99% RTP

A classic-style game with two sets of three-reel slots, Mega Joker launched in 2013 and has become a fan favourite thanks to its retro, fruit machine feel and remarkably high 99% RTP.

Jackpot 6000 – 98.8% RTP

Jackpot 6000 offers another nostalgia trip for fans of traditional fruit machines. Released in 2014, its three-reel gameplay is incredibly simple, while the casino-style backdrop and sound effects add to the old school atmosphere.

Blood Suckers – 98% RTP

Released back in 2013, Blood Suckers lets players sink their fangs into a gothic 98% RTP game with five reels, evocative symbols including crossbows and crosses, and a vampire-slaying bonus round.

Böb – The Epic Viking Quest for the Sword of Tullemutt: 98% RTP

The title itself is epic in length, and this 2015 five-reeler lives up to the billing with its plethora of helmet, battleaxe, and longboat symbols, not to mention the bonus game where players hunt down hidden swords for cash rewards.

Kings of Chicago – 97.8% RTP

Launched in 2011, Kings of Chicago changes things up by dealing out cards rather than spinning symbols. It’s still very much a slot game, though – a familiar five-reeler which pays out depending on which poker hands come up.

Netent Slot Game RTP
Mega Joker 99%
Jackpot 6000 98.8%
Blood Suckers 98%
Böb – The Epic Viking Quest for the Sword of Tullemutt 98%
Kings of Chicago 97.8%

Top 5 Microgaming Payout Slots

Based on the Isle of Man, Microgaming developed the first mobile casino software back in 1994. As you might expect from such a big name in the industry, several of its games are up there among the best RTP slots.

Hot Ink Slot – 97.5% RTP

Launched in 2011, the tattoo-themed Hot Ink Slot has five reels, 1,024 paylines, and a quirky bonus round where symbols are tattooed onto a woman’s body, providing potential returns along the way. 

Arabian Rose – 97.5% RTP

Inspired by the folklore of the One Thousand and One Nights, the 2014 game Arabian Rose is an unabashedly exotic five-reeler complete with genie lamps, atmospheric music and a generous RTP.

Retro Reels: Extreme Heat – 97.5% RTP

Boasting a sizzling RTP, Retro Reels: Extreme Heat has been a hit with fans of classic slots since its launch in 2011. The slot blends classic symbols like bells and bars with nifty features like being able to re-spin individual reels in a bid for winning paylines. 

Supernova – 97.05%

It may look small with its 3×3 reels, but Supernova makes up for that with cool, sci-fi graphics and a great soundtrack, as well as a multiplier feature which is set on some extra reels. Released in 2017, it still shines brightly in Microgaming’s ever-growing galaxy of slots. 

Couch Potato – 97.05%

With three reels and one fixed payline, Couch Potato is ideal for players feeling too lazy to swot up on complex gameplay and bonus rounds. This 2014 game is also a lot of fun thanks to its cartoonish graphics, 25x Wild multiplier, and hefty RTP.

Microgaming Slot Game RTP
Hot Ink Slot 97.5%
Arabian Rose 97.5%
Retro Reels: Extreme Heat 97.5%
Supernova 97.05%
Couch Potato 97.05%

Top 5 Yggdrasil Payout Slots

Founded in 2013, Yggdrasil Gaming has firmly established itself as a provider of some of the best slot games around right now. Here are five to look out for.

Jokerizer – 98% RTP

Launched in 2016, Yggdrasil’s best RTP slots game is a five-reel experience which gives classic fruit machine aesthetics a glossy makeover. It also features a ‘Jokerizer mode’ which can yield mystery prizes.

Tut’s Twister – 97.1%

A 2018 favourite, Tut’s Twister is a five-reel, Egyptian-themed slot with immersive graphics and exciting game mechanics – entire reels can suddenly transform into sandstorms stacked with wilds, bringing forth free spins and multipliers in the process. 

Beauty and the Beast – 97.1% RTP

Set in the Beast’s castle, this 2017 Yggdrasil slot is a suitably magical-looking game with gleaming jewels, Disney-like graphics and a special ‘Golden Bet’ feature which can boost your chances of bagging free spins. 

Baron Samedi – 97% RTP

Released in 2018, Baron Samedi is a lavish, voodoo-themed, five-reel slot that combines collectable tarot cards and expanding wilds with free spins and progressive benefits. 

Nitro Circus – 97% RTP

Yggdrasil’s first branded game brings the exploits of action sports performers Nitro Circus into the world of slots. Its five reels give way to an arcade-like bonus game, Nitro Jump, where you can perform stunts and collect bonuses along the way.

Yggdrasil Slot Game RTP
Jokerizer 98%
Tut’s Twister 97.1%
Beauty and the Beast 97.1%
Baron Samedi 97%
Nitro Circus 97%

Best Paying Mobile Slots

Want to play the best RTP slots while on the go? All the best online casinos have mobile-friendly websites, so you can do exactly that when you play at our recommended slots sites. The top slots developers like NetEnt, Microgaming and Playtech all optimise their games for mobile play, meaning you can enjoy smooth spinning when you play on your mobile or tablet.

If you want to enhance your mobile slots experience, download a casino mobile app. A whole host of the UK casinos have native apps that are free to download on Android and iPhone, and come with a number of benefits. For starters, mobile apps store data on your device, rather than relying on slow web servers, so you can enjoy faster gaming. Plus, if you turn on push notifications, you’ll always be kept in the know on the latest promotions and hottest new slots releases.

Choosing a Reliable Casino

Playing the best RTP slots is all well and good, but it’s important to play at a reliable casino that will pay out if you do land a win. There’s only one way to do this: choose a UK Gambling Commission (UKGC) licensed casino. The UKGC regulates casinos to ensure a number of things, including account security and fair gaming. This means that all the high paying slots you play at licensed casinos have accurate RTPs and use random number generators (RNG), ensuring each spin is random and unbiased. The UKGC also ensures that online casinos pay out within the stated timeframes. None of this is guaranteed if you choose an unlicensed site.

Every casino site featured on TopRatedCasinos is fully licensed and regulated, so you can rest easy when you choose one of our recommended casinos. Want to double-check that a casino is licensed? Simply scroll to the footer of your chosen site where you’ll find the UKGC logo and the site’s licence number, or alternatively take a look at the regulator’s public register.

Physical Slot Machine Manufacturers 

The best payout online slots are synonymous with innovative software developers like Microgaming and NetEnt. But what about the makers of physical slot machines? Let’s take a quick look at some of the leading names in the field. 

Scientific Games Corporation (SG) 

Founded by John Koza and Daniel Bower in 1973, Scientific Games provides gambling products and services to organisations worldwide. While headquartered in Las Vegas, Nevada, the company also operates as SG Gaming in the UK. Trading out of the Greater Manchester town of Oldham, it supplies slot machines alongside related products and services to licensed betting offices, casinos, arcades, and bingo halls like Club 3000. 

International Game Technology (IGT)

Top games manufacturer IGT has its headquarters in London, with offices in Rome, Las Vegas, and Providence, Rhode Island. With a portfolio that includes traditional reel slot machines, video slots and progressive payout machines, IGT’s products can be found in casinos globally, including hotspots like Vegas and Atlantic City. It’s certainly come a long way since it was founded by former jukebox distributor William “Si” Redd back in 1975.

Ainsworth Game Technology (AGT)

Founded in New South Wales in 1995 by Len Ainsworth, Ainsworth Game Technology is a gaming machine designer, developer and manufacturer. The company operates across Australasia, North America, Latin America, and Europe. Recent highlights for AGT include the installation of its Historical Horse Racing System and more than 100 gaming terminals at Rosie’s Gaming Emporium in Virginia, and an agreement to launch games machines for Churchill Downs. 

Aristocrat Leisure Ltd

AGT founder Len Ainsworth started his first company, Aristocrat Leisure, in 1953. He stepped aside in 1984 following a cancer scare but went on to launch AGT as a new enterprise. Still going strong today, Aristocrat Leisure is headquartered in Sydney, with offices in Russia, South Africa, and the US. Hugely respected by casino operators and gamblers alike, the company operates in more than 300 gaming jurisdictions across the globe. 

Aruze Gaming America, Inc

Tracing its history back to the founding of Universal Lease Company in Japan in 1969 and Universal Distributing of Nevada in Las Vegas in 1983, Aruze Gaming America, Inc took its current name in 2005. Subsidiaries include Aruze Gaming Australia and Aruze Gaming Africa, and the company also operates a manufacturing facility in the Philippines. Headquartered in Las Vegas, the company provides land-based casino slot machines and games in a multitude of international territories.

Slots Bonuses

Online casino bonuses are a great way to boost your bankroll, either through cash tokens or free spins. When you sign up to a new online casino, the bonus on offer could be a deciding factor in where you end up spinning the reels, and there are a few factors to consider for the major bonus schemes available when you’re making your decision.

Matched Deposit 

This is the most common welcome bonus at online casinos, seeing the operator match your first deposit by a certain percentage and up to a certain amount. For example, 100% up to £100 would see the casino provide a maximum of £100 in additional funds, meaning you can deposit £100 and have £200 in your on-site wallet to play with. These bonuses are typically tied to wagering requirements, meaning you must play the value of the bonus a certain number of times before you can withdraw any winnings made using the bonus funds. 

Free Spins

Free spins are the quintessential slots bonus, commonly offered in-game, as a sweetener for another bonus, or as a standalone bonus in their own right. If you’ve racked up some free spins as part of your online casino’s bonus scheme, these spins may be restricted to particular games, or they may be subject to a winnings cap. The biggest factor here is in-game restrictions, as you’re unlikely to be able to use free spins offered as part of a welcome bonus on high RTP slots — chances are, you’ll be limited to playing something like Starburst or Gonzo’s Quest, which are excellent titles nonetheless.

Time limits are commonly used too, with your spins typically needing to be spun within a set timeframe. Spins won in-game aren’t subject to such restrictions, leaving the focus on trying your luck a few more times without wagering your cash to do so.

Wagering Requirements

Not exclusive to matched deposit bonuses, wagering requirements can be attached to practically any bonus or promotion offered by an online casino. With wagering requirements in place, you must wager the value of your bonus a set number of times before the online casino will allow withdrawals. The average is 35x, with anything above being considered high wagering, and anything less qualifying as low wagering. The amount that must be played before making withdrawals can be calculated in one of two ways when the bonus is straight cash or has a clear monetary value:

  1. £100 (bonus) x 35 (wagering requirements) = £3,500 (total that must be staked)
  2. [£100 (deposit) + £100 (bonus)] x 35 = £7,000

As you can see, the calculation used can make a huge difference. Be sure to check the bonus terms and conditions to make sure you understand how the wagering requirements will be calculated.

If wagering requirements are in effect for free spins, the calculation is typically made using the value of your winnings from those free spins.

  1. For example: £50 (winnings) x 35 = £1,750.

Bonus Calculator

Our bonus calculator tool makes it easy to find out the amount you’ll need to wager in order to meet your bonus’s wagering requirements. Enter the deposit value and percentage, the wagering requirements, the contribution percentage of your favourite game, and whether your casino includes your deposit in the calculation. All of the details you’ll need can be found in your casino’s bonus terms and conditions. Once that’s done, click ‘Calculate’!

Please enter a value between 1 and 500
Please enter a value between 1 and 500
Please enter a value between 1 and 100
£0.00
£0.00
£0.00

Ready to Play the Best Paying Online Slots?

Now that you have a better understanding of RTP and volatility, and how to recognise the best payout online slots, why not try them out yourself? Compare the top online casinos featuring the best slot games and follow our links to sign up and claim your optional welcome bonus!

Frequently Asked Questions

  • It’s unlikely. Pretty much all casinos limit welcome bonuses like free spins to certain titles, and these often exclude progressive jackpot games and the highest paying slots. You’ll still be able to use your spins on top online slots with respectable RTPs, though. For example, NetEnt’s Starburst has a payout rate of 96.1% and is one of the most popular slots for free spins bonuses.

  • Yes, if you want to play these games for real money. Luckily, our recommended best online casinos offer a range of fast and secure banking options including PayPal, Neteller and Skrill, so you have plenty of choice. Most sites offer free demo slots so you can play slots for fun, but progressive jackpot games are often excluded.

  • The best paying online casino is the site which pays out the most to players on average, but there’s no easy way to check this. If you’re looking for the best payout UK online casino, you should check out the games library to see which sites offer the largest number of the highest payout slots.

  • Yes. Casinos often partner with different software developers, so the games on offer vary, but you can play high RTP slots at the majority of new casino sites. Some of the best payout online slots in the UK, like Goblin’s Cave, aren’t as widely available as other games, so you may have to search a bit harder to play certain titles.

  • If you land a win on the best RTP slots and withdraw your returns, head to the cashier page, enter in your chosen amount and hit request. Make sure to read up on withdrawal limits and processing times- check out our fast payout casinos for instant withdrawals.

Contributors

Marcus is an Editor at TopRatedCasinos.co.uk and is currently based in London, UK. Along with managing content across the site, he’s an expert in all things related to online casinos, with a particular personal interest in poker and blackjack.

Media Mentions