With so many choices for online slot websites in the UK, it can get difficult to figure out which ones are the best to play. We’ve put together a detailed guide to the top slot websites in the UK. Our guide explains how the games work and helps you decide which of the best UK slot sites is right for you. We only suggest slot sites that we’ve personally tried and found to offer the best online slot games, the most generous bonuses, and quick payouts.
So, what are the best slot sites in the UK that pay real money in winnings? In our rating, best gambling sites for highest payout RTP slots are: Vic, Barz, Rialto, bet365 and Mr.Play. The 10 best winning slots by gambling sites in 2023 are Blood Sucker, Book of Ra Deluxe, Mega Joker slot and more winning games.
Best Online Slots UK Sites (November 2023)
Play the best online slots with best return to player (UK) at the following slot sites:
- Spin Rio (code: BGRIO)
- bet365 Casino, code 365GMBLR
- Grosvenor Slots
- The Vic Slots
- 10bet Casino
- Spin and Win – fast payouts
- Barz Casino
- Mr.Play Slots
- Pub Casino – new slot site
Which are the best sites for playing online slot games in the UK? These are Spin Rio, bet365 slots, Grosvenor, Amber Spins and new The Vic (access new slot games with bonus code VICGMBLR).
Disclaimer: As RTP changes constantly and we as third parties cannot guarantee that the percentages will be corrected in real-time, we mention approximate RTP numbers.
Online Slots: Best Slot Sites for UK With Bonus Spins
- Spin And Win CasinoSpin & Win Casino £250 Deposit Bonus + 100 Spins. Use code SPINGMBLR18+, BeGambleAware.org.
1st dep offer Code SPINGMBLR. Minimum 1st dep of £10 to get £100% up to £250 on selected match slots & 100 Free Spins (FS) on Blueprint slots at 0.20P. Deposit Bonus Playable on selected Slots. 40x wagering requirement (Dep + Bonus) & MCR x5 for Bonus. FS and FS winnings are playable on Blueprint slots only, FS: 50xWR & Max win £50. Full T&Cs apply.SPINGMBLR
- The Vic CasinoNew Vic Casino Bonus: up to £200 + 100 free spins. Use code VICGMBLR18+, BeGambleAware.org.Read The Vic Casino ReviewNew players only. Code VICGBMLR required on a minimum deposit of £20 for up to £100 bonus + max 20 Free Spins valid for 7 days. Bonus playable on *selected slots*. Wagering requirements on bonus is 50x (deposit+bonus), max convertible rate from bonus is 5x. Free spins & winnings playable selected *Lady’s Charm Deluxe*, wagering requirements on free spins is 35x, maximum convertible amount from free spins is £30. 18+ only. Valid until further notice. Full T&C’s apply.VICGMBLR
- GrosvenorGrosvenor Casinos Bonus: Deposit £20, Play with £5018+, BeGambleAware.org.
New customers only. Min deposit £20. Max bonus £30, bonus amount non-withdrawable, playable on selected games only. 30x wagering for £30 bonus. Expires within 30 days. Max Win £2,000. Full T&Cs apply.Read Grosvenor Review
- Rialto CasinoRialto Casino: 100% match bonus up to £300 + 200 free spins for slots18+, BeGambleAware.org.Read Rialto Casino ReviewWelcome bonus package on first 3 deposits 1st Dep. Min £20. USE CODE RIALTOGBMLR. Max bonus £100. 40x wagering (bonus & deposit). max bonus to cash 5x. Free Spins: 50 Free spins. 25x wagering. Max bonus to cash £25. Claim once. See full T&Cs for 2nd & full T&Cs for 3rd Deposit offers. Full T&Cs apply.RIALTOGMBLR
- Casushi CasinoCasushi Casino UK: Get 100% Deposit Bonus up to £50 + 50 Spins18+, BeGambleAware.org.
New accounts only. Minimum first deposit of £20 required to participate. Maximum promotion amount per player is £50 Bonus and 50 bonus spins (30 spins on day 1, 10 spins after 24 hours and a further 10 spins after 48 hours). The welcome offer is not available on pre-paid cards or e-wallet (Neteller and Skrill) deposits. The maximum cash out from any individual bonus is £250. Any cash out over this amount will be adjusted manually down to £250. Casushi bonus spins will expire 48 hours after being credited. Full terms apply.Read Casushi Casino Review
- Mr PlayMr Play Casino Bonus: Get 100 Free Spins + £200 Deposit Bonus18+, BeGambleAware.org.
Only UK players. After first deposit made, customers will get + 20 Spin for the next 4 days: 1st day after First Deposit: 20 Spins of Finn and the Swirly Spin 2nd day after First Deposit: 20 Spins of Book of Dead 3rd day after First Deposit: 20 Spins of VIP Black 4th day after First Deposit: 20 Spins of Aloha! Cluster Pays Winnings won with spins that require deposit, have to be wagered 35x. Bonuses that require deposit, have to be wagered 35x.Read Mr Play ReviewBGPLAY
- Spin RioSpin Rio Casino: Get up to £200 + 100 Free Spins18+, BeGambleAware.org.
New depositing UK players only. Min. deposit £10. max bonus of £200 in 3 deposits, valid 21 days, on selected slots; 35x wagering on the sum of deposit & bonus applies. Country Restrictions and Full T&Cs apply. Code: BGRIORead Spin Rio ReviewBGRIO
- Magic Red CasinoMagic Red Casino Bonus: Spend 10, Get 100 Free Spins on Big Bass Bonanza18+, BeGambleAware.org.
New Players Only. 100 Spins on Big Bass Bonanza game Only. No wagering required. Min. Deposit £10. £10 Max. Bonus. Offer valid for 24 hrs. Terms and Conditions Apply.Read Magic Red Casino Review
- Lucky VIPLuckyVip Casino: up to £100 Bonus + £7 on Live Casino. Use code: LVGMBLR18+, BeGambleAware.org.
Minimum 1st dep of £20 to get £100% up to £100 on selected match slots; 40x wagering requirement (Dep + Bonus) & MCR x5 for Bonus + Guaranteed Live bonus wheel up to £7. Live Bonus and Live Bonus Winnings are playable on selected Live Games. 20x WR, convertible to real cash x5 bonus amount. Full T&C’s apply.Read Lucky VIP ReviewLVGMBLR
- Bet365Bet365 Casino: Stake £10, Get 50 Bonus Spins. Promo Code “365GMBLR”18+, BeGambleAware.org.
The Bet365 sign up code is 365GMBLR . New customers only. Min deposit £10. Bet Credits available for use upon settlement of bets to value of qualifying deposit. Min odds, bet and payment method exclusions apply. Returns exclude Bet Credits stake. Time limits and T&Cs apply. The bonus code 365GMBLR can be used during registration, but does not change the offer amount in any way.Read Bet365 Review365GMBLR
- FruitKings CasinoFruitkings Bonus: up to £50 + 100 free spins18+, BeGambleAware.org.
New Players Only. 100% Bonus On First Deposit Up To £50 & 100 Bonus Spins (50 Spins On Day 1, 25 On Day 2, 25 On Day 3) For Book Of Dead Slot Only. Min First Deposit Of £10. Max Bonus £50. Max Bonus Bet £5. Max Bonus Cash-Out £250. 40x Wagering Requirements. Bonus Expiry 30 Days. Bonus Spins Expire After 48 Hours. Game Restrictions Apply. Further Terms Apply.Read FruitKings Casino Review
- All British CasinoAll British Casino: 100% Deposit Bonus up to £100 + 200 Free Spins18+, BeGambleAware.org.
Welcome bonus for new players only. Maximum bonus is 100% up to £100 + 200 free spins. Min. deposit is £20. No max cash out. Wagering is 35 x bonus. Max. 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.Read All British Casino Review
- Casimba CasinoCasimba Bonus: £200 deposit bonus + 50 bonus spins18+, BeGambleAware.org.
New players only. Min. deposit £20. Max. bonus bet is £5. Bonus spins on selected games only and must be used within 72 hours. Winnings from Bonus spins credited as bonus funds and capped at £100. Bonus funds expire in 30 days, unused bonus funds will be removed. Welcome Offer is 100% match up to £200 plus 50 bonus spins on your 1st deposit, 50% match up to £50 on your 2nd deposit. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds count towards wagering contribution. Affordability checks apply. Terms apply. Please gamble responsibly.Read Casimba Casino Review
- Monopoly CasinoMonopoly Casino Offers 30 Free Spins18+, BeGambleAware.org.
New members only, must opt-in. Min £10 deposit & wager. 30 day expiry from deposit. Free Spins: on MONOPOLY Paradise Mansion. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply.Read Monopoly Casino Review
- PlayFrank CasinoPlayFrank Casino Bonus: Get £100 Deposit Match + 50 Free Spins18+, BeGambleAware.org.
UK customers only. The PlayFrank bonus is valid for new players only without an expiration date. The Welcome Bonus can only be claimed only once. No promo code is required. The first Welcome Bonus is a 100% Bonus up to £100 and 50 Bonus Spins. To claim the PlayFrank casino. Bonus you need to make a min deposit of £20. Deposits made via Skrill or Neteller are not eligible for the Bonus offer. The Bonus Spins will be credited on Big Bass Bonanza. The Free Spins will be credited instantly. The Bonus needs to be wagered 35 times before the Bonus Balance can be converted to your real money balance. Maximum bonus bet amount is £4.00.Read PlayFrank Casino Review
- WinOManiaWinOmania Casino: Get 100 Free Spins + up to £100 Match Bonus18+, BeGambleAware.org.
New UK players. 1st deposit only. Min deposit £10. Max bet with bonus £2. Max bonus £100. x40 wagering. Bonus spins valid for selected games only. x40 wagering on free spin winnings. Expire within 24 hours. User Agreement & T&C apply.Read WinOMania Review
- Bally CasinoBally Casino UK Bonus: Play £10 Get 30 Spins18+, BeGambleAware.org.
Read Bally Casino ReviewNew members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. 18+. Free Spins: on Secrets of the Phoenix Megaways. Spins value: 20p each.
Given the speed and scale of the online casino boom, it is hard to know where to start when selecting your favourite slot. Do you look for the highest guaranteed return or do you just dive into the ones with the biggest Jackpots?
Maybe you are more taken with design and are drawn to those games with the best graphics, soundtracks and “journey”. The truth is, whatever your preference, there is a game out there for you.
Best payout online slots with best RTP in the UK fall roughly into four categories; 3-reel, multi-reel, video slots and Progressive slots. They can offer between 25 and 100 paylines and any number of Bonus Features, 3D animation and much else besides.
At the heart of everything, however, is value and excitement, so let’s have a look at 10 of the best slots for RTP% (top payouts). All real money games that pay the most can be enjoyed on desktop and mobile versions, for both iOs and Android.
UK TOP Sites With Highest RTP Online Slots & Bonuses
Play slots at the best UK bonus sites with high RTP that offer good promos: from 100 free spins to up to £500 in deposit bonus.
|Slot Site||Winning (High Payout) Slots||Bonus|
|Vic UK Casino||“Vikings Go Berzerk”, “Mustang Gold”||Up to £200 + 100 free spins. Use code VICGMBLR|
|bet365 Casino||“Book of Dead”, “Starburst”||50 Bonus Spins. Promo Code “365GMBLR”|
|Rialto Casino||“Rialto Reels”, “Casino Royale”||100% match bonus up to £300 + 200 free spins|
|Spin & Win Casino||“Gonzo’s Quest”, “Fire Joker”||£250 Deposit Bonus. Use code SPINGMBLR|
|Mr Play||“Legacy of Dead”, “Mega Moolah”||up to £200 + 100 free spins|
|Casimba||“Thunderstruck II”, “Avalon II”||100% welcome bonus up to £500 + 50 bonus spins|
|All British Casino||“Bonanza”, “White Rabbit”||100% match bonus up to £100 + 10% cashback|
|Dream Vegas||“Immortal Romance”, “Mega Fortune”||100% deposit bonus up to £400 + 50 bonus spins|
|Magical Vegas||“Double Bubble”, “Secrets of the Phoenix”||100% deposit match up to £300. Bonus Code: MVCGMBLR|
Remember to always check the terms and conditions of any bonus offer, as most require a minimum deposit and come with wagering requirements.
Try high limit slots casinos, such as Spin and Win, where you can find winning games such as Stacked Fire 7s slot with RTP 95.32% and Fluffy Too Slot with £0.50 per line.
Top 10 best online slots with best return to player (UK)
|Slot Game||Developer||RTP %||Win||Paylines|
|Ugga Bugga||Playtech||99.07%||No Jackpot||10|
|Mega Joker||NetEnt||99%||Based on Bet||Varies|
|Jokerizer||Yggdrasil||Up to 98%||£60,000||Varies|
|White Rabbit Megaways||Big Time Gaming||97.77%||Based on Megaways||Up to 240,000|
|Dead or Alive 2||NetEnt||96.82%||Over 111,000x||9|
|Buffalo King||Pragmatic Play||96.06%||Based on Bet||4,096|
|Wild Cauldron||Quickspin||96.06%||Based on Bet||4,096|
|Book of Ra Deluxe||Novomatic||96%||Based on Bet||10|
The best RTP slots with the best payouts overview
- Best Megaways Slot: “Bonanza Megaways” – Known for its dynamic reel setup that can lead to thousands of ways to win in a single spin. The best gambling site for playing the winning slot is Monopoly Casino.
- Most Innovative Slot: “Gonzo’s Quest” – Celebrated for its unique Avalanche feature where symbols fall into place rather than spinning on reels.
- Highest RTP Slot: “Mega Joker” – Offers one of the highest Return to Player (RTP) percentages among online slots, providing better long-term payout potential.
- Best Progressive Jackpot Slot: “Mega Moolah” – Famous for its massive progressive jackpot prizes that can turn players into millionaires.
- Best Branded Slot: “Game of Thrones” – Based on the popular TV series, it offers an immersive gaming experience for fans.
- Best Classic Slot: “Starburst” – Loved for its simplicity and vibrant, gem-themed gameplay.
- Best 3D Slot: “Betsoft’s Slotfather” – Renowned for its impressive 3D graphics and immersive storytelling.
- Best Mobile Slot: “Book of Ra Deluxe” – Offers smooth and engaging gameplay on mobile devices.
- Best Fantasy-Themed Slot: “Lord of the Rings” – Takes players on an epic adventure through Middle-earth.
- Best Horror Slot: “Blood Suckers” – Perfect for those who enjoy a spooky and thrilling gaming experience.
Return to Player % refers to the amount paid out by each slot for every £100 staked. The higher the percentage, the better the value to the player. There are many new slot sites with high payout slot machines such as Big Bass Bonanza. Among them: Moon Games and Vegas Spins – they offer up to 777 Free spins.
This vampire-themed classic from NetEnt boasts a 98% RTP and is a low-volatility favourite for punters everywhere. There are 5 reels and a 1,014x maximum win. Match three or more symbols across one of the twenty-five fixed paylines to land a win. The famous Vampire Slaying Round is unlocked when you land 3 of the stake and hammer bonus symbols. A gory, ghoulish giant of the genre and great value!
Ugga Bugga from Playtech has a crazy 99.07% RTP and has an unusual set-up. 10 sections, each with 3 symbols in them gives the game a unique feel. The only way to win is to line up 3 of the same symbols in one section. So essentially you get 10 times to win, every spin. There are chances to hold and spin, giving Ugga Bugga a pleasant retro feel. Symbols include masks, drums and hats. There is no jackpot and volatility is low, but Ugga Bugga offers new punters fantastic value and a great foot in the online casino door.
Another NetEnt creation, this all-time favourite has a staggering 99% RTP. The background and general feel is camp and fun, with potted palms and vintage wallpaper added to the gaiety. Symbols include the classic cherries, bells and watermelons. The minimum bet is anything from 1p to £2, so Mega Joker will suit allcomers. There is a Super Metre Mode that allows you to bet up to 200x your coin value per spin.
This high payout slot from Microgaming has a 96.65 RTP% and is in the 5-reel, 3-row classic set-up. Bonus features like Wild Storms and the Great Hall of Spins can help you reach a maximum win of 8,100x. The theme is Norse mythology, so expect Thor to pop up and cause mayhem.
Book of Ra Deluxe
One of the best payout online slots by Novomatic is another for-the-ages game that pops up everywhere, with a highly-respectable 96% RTP. Design-wise it a classic 5-reel, 3-row, 10 payline set-up and punters have fallen for the Egyptian-themed design, replete with symbols of scarab beetles, pharaohs and Horus. The Bonus round contains the Expanding Symbol that can cover three symbol positions. You’ll go ga-ga for Ra.
This slot with fast payout percentage comes from the Yggdrasil stable and has an RPR of up to 98%. Carnival-based, Jokerizer comes in 22 languages and has an enhanced portrait mode for mobile devices, making it ideal for gaming-on-the-go. It is high-volatility, has a £60,000 maximum win and you only need 2 Jokers for the mystery win in bonus mode. A cheeky classic.
Wild Cauldron (Quickspin)
Among best payout online slots in the UK, the Wild Caildron game arrived in 2020 and is a 6-reel, 4-row stonker with 4,096. The RTP % of 96.06 is none too shabby either. Play the bonus round and you can expand the game to 8 rows and over 200,000 ways to win! Look out for monsters and potions in this bubbling beauty.
White Rabbit Megaways
Next fast payout slot title by Big Time Gaming is a trip into Alice in Wonderland world and has a very decent 97.77 RTP %. With potentially over 240,000 paylines, this is a high-volatility thrill ride that takes you through the looking glass. The reels are full of grinning Chesire Cats and the Queen of Hearts. Curiouser and curiouser. Here is a list of the best Megaways slot sites.
Dead or Alive 2
This is a new riff (2019) on the gunslinger classic from NetEnt, with a very decent RTP % of 96.82. It is only a 5-reel, 3-row structure with 9 paylines, but can pack an over 111,000x pay-out punch. There are scatter wins, sticky wilds and the famous High Noon Saloon and Train Heist Free Spin games.
Looking for the top payout online slots UK casinos can offer? This is another wild-west classic from Pragmatic Play. With an RTP % of 96.06, punters love the option of personalising their game, via the player interface. There are 6-reels, 4-rows and stakes can range between 40p and £60. The graphics and vividness of the background are superbly rendered and Eagles, coyotes and cougars abound in this high-volatility thriller.
Blazing Bison Gold Blitz: High Volatility & Rich Features
Blazing Bison Gold Blitz is a high volatility video slot, providing an opportunity for massive wins, although they may be less frequent. It offers six reels with a whopping 4096 ways to win. With an RTP of 96.00%, this game provides a favourable return rate. The real attraction, however, is the game’s features. Wild symbols can substitute for other symbols to create winning combinations, and Free Spins offer the opportunity for more chances to win without additional stakes.
Cleopatra: Balancing Frequency & Features
Cleopatra presents a medium volatility videoslot game, offering a balance between frequency and size of wins. It features five reels and 20 paylines, with an RTP of 95.02%. Cleopatra video slot also offers several exciting features. Multipliers can exponentially increase your wins, Free Spins provide additional chances to win without extra bets, and Wilds can fill in for other symbols to create winning combinations. The best gambling websites for playing video slots that are on our list are: Unibet, bet365, Spin Rio, Videoslots.com and GrosvenorCasinos.
Who Wants to be a Millionaire Megaways: Massive Wins and Engaging Gameplay
For those who enjoy the thrill of chasing substantial rewards, Who Wants to be a Millionaire Megaways is an excellent video slot for real money at bet365 Games. This high volatility slot offers a generous 117,649 ways to win across six reels. Its Return to player payout rate is a commendable 96.24%, and it features exciting Megaways, Scatter Feature, and Wilds.
Rainbow Riches: Medium Volatility Slot with a Taste of Luck
Rainbow Riches is a medium volatility slot offering frequent wins. With 20 paylines on 5 reels and an RTP of 95.00%, it ensures that every spin is filled with possibilities. The game also offers Free Spins as an additional feature, enhancing the gaming experience. Where to play? Visit Spin and Rio or play slots at new sites like Winomania (with free spins).
Our Best Online Slots UK Picks
- Best Slot Game Overall – Book of Dead
- Premier Slot Site – Mr Play Slots
- Top No Deposit Bonus Casino – 888Casino, Betfred (No wager free spins slots)
- Free Spin Frenzy – Starburst at The Vic (many ways to win)
- New Slot Sites – The Pub and Winomania
Which Gambling Sites Offer Best Payout Slots?
If you want to play slots that offer best payouts and high winning percentage (RTP) visit these gambling sites:
- bet365 – code 365GMBLR
- Vic Casino
- 10bet casino
- Grosvenor Casinos
- William Hill slots
- Rialto online casino
- Megaways casino
- Spin and Win
Discover the top online casino sites with the best RTP (return to player). Enjoy low house edge roulette and slots with RTPs over 96%. bet365 casino, 10bet are the best or better to say highest payout casinos in UK as per 2023. You can even check the casino’s audited payouts to find the best bonus deals around. Spin at online casino where they offer easy withdrawal process, check out these sites.
Online Casino Sites With Best Winning Real Money Slots
- bet365 UK Casino: best payout slots & games
- 10bet casino: 97.01%, best payouts, quick withdrawing
- Unibet Online Casino: highest payout rate at 96.5%
- Grosvenor: highest payout casino at approx. RTP of 97%
- 888Casino: best payout at 96.2%
- 32Red Casino: payout rate 95.51%
- Betfred Casino Site/App: 96.5%
- Betway Casino: 96.36%
- Grand Ivy Casino: 96.5%
How RTPs Are Determined
Every licensed in UK online casino has a payout percentage programmed into the game. This is a theoretical figure based on millions of spins over time.
For instance, a slot with an RTP of 97% will pay out on average £97 for every £100 paid in. The remainder is kept by the casino. In this case, the casino would keep £3 of every £100 bet on that particular slot. Read about some slot strategies that may probably even help you increase your chances of winning.
The best online slots sites only feature games with high payouts percentage. bet365, Betfred, 10Bet are among the best payout casinos in the UK to play at. You might find bonus slots with RTPs of 98% or big-money progressive jackpots that pay out huge sums. They all also offer apps, a number of popular payment methods and bonuses to new customers.
Best Payout Slots – Top Payout Online Slots UK FAQs
This refers to Return To Player percentage. This is the percentage of every £100 played on the game that is returned to players. The higher the percentage, the better value for players.
Yes, not only are all the software companies and participating casinos licensed and registered in the UK by the Gambling Commission, they also employ the latest SSL firewall and encryption technology.
Blackjack: 99.2%, Roulette: 96.1%. Slots: 87.95% (Starburst and Book of Dead – slot games with best payouts).
10 Times Wins Online Casino Slot, a game by Rival Gaming, is a delightful imitation of its predecessor, 10 Times Pay. It recreates the exciting ambience of a real casino with its sound effects and spinning reels, much akin to the Vegas classic. This game upholds the enduring appeal of traditional islot machines featuring fruit symbols and the cherries, bars, and 7s. The game allows a maximum of three lines to be activated, with coin sizes ranging from $0.01 to $5. Players can bet up to three coins per line, with the highest bet being $45.