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When it comes to online casinos, slots are known to offer the highest potential winnings of all games. A few lucky players turn low-stakes spins into life-changing wins, but progressive jackpot games aren’t the highest paying slots by frequency. 

If you’re looking to play the best payout slot machines online, your search ends here. 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. 

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.

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.

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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.

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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.

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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.

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T&Cs Apply
New Customer Offer

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.

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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.

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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

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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%.

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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.

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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.

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Blood Suckers — 98%

Blood Suckers is one of NetEnt’s best-known slots and, with a set RTP of 98%, it’s easy to see why. This vampire-themed title features scatters, wilds and free spins with a 3x times multiplier, so this slot is jam-packed with fun features. Land three bonus symbols and you’ll get to play the bonus game, where you can open the lucky coffins to win cash prizes.

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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.

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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.

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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.

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What Makes a High Paying Slot?

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.

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

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.

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.

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  • Big Range of Games
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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.

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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.

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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.

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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.

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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.

Top Choice for Divine Fortune

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New Customer Offer

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.

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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.

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.

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

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Play the Best Payout Slots Today

Ready to try your luck on the best payout slots? Spin the reels today at one of our top-rated UK casinos. Compare sites with our carefully selected leaderboards, and check out our expert reviews to get the inside information on bonuses, banking options and more. Sign up, claim your welcome bonus, and start playing the UK’s best payout slots today!

Frequently Asked Questions

  • icon FAQ Can I use bonuses on the best payout slots?

    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.

  • icon FAQ Do I have to deposit to play the best RTP slots?

    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.

  • icon FAQ Which is the best paying online casino?

    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.

  • icon FAQ Can I play the best RTP slots at new online casinos?

    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.

  • icon FAQ How do I withdraw at online casinos?

    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.