Slot Sites (2025) With 10 Best Payout Online Slots

There has never been a better time to be a slots fanatic. From their creation in the 19^th Century to the ubiquitous amusement arcade trip of your childhood holidays, punters have always had a soft spot for those spinning reels and the exciting clatter of coins (metaphorical or otherwise) into the tray when those symbols line up. Although yesteryear’s “one-arm bandits” are now more likely to be in a museum, the principle underpinning the slot remains remarkably unchanged. Whether you are standing in the bookies, sitting in front of your PC (pretending to work) or out and about on your smartphone and mobile casino App, slots all look and have the same feel: that of wonderful wagering wonder! 

Here, we have listed the slot machines with the best payouts and the top-recommended UK casino sites where you can play them online with real money bonuses.

10 Best Slots With High Payout Return to Player (RTP%)

This table showcases the top 10 slots with high RTP and volatility levels, metrics that promise potentially rewarding gameplay.

How important is the RTP % on a slot? 

Very. It stands for Return To Player and tells you how much you can expect back from £100 if you played the game over a long period. Anything over 95% is considered ok, with 96.5%+ seen as a pretty decent value.  The RTP (Return to Player) percentage can vary based on the agreements between the casino and the software provider. It’s always a good idea for players to check the specific RTP on the casino site they are using to get the most accurate information.

Recommended Slot Sites UK List

• bet365 Games – Playtech and NetEnt, 100 free spins
• Spin Rio – Fire Joker slot and £200 deposit bonus
• Spin and Win – Extensive Slot Selection & and progressive jackpots
• Virgin Games UK – Award-Winning Slots Site
• The Vic – Renowned for Slingo
• Dream Vegas – 2000+ video slots with good RTP%
• Pub Casino – best new slot site with UK licence from 2023
• Mr Play – best mobile app for playing slots
• 888Casino – exclusive jackpot slots & no deposit
• William Hill Slots

UK Slots Sites – Best Casinos

Which are the best gambling sites in the UK for playing slots? Based on user reviews, the top list for 2025 includes bet365 Games, Spin Rio, Mr Play, Grosvenor, and PlayOjo.

bet365 Games

Online casino at Bet365 Games is one of the best sites for playing slots in the UK. They bring you various slots featuring popular games from leading software providers like Playtech and NetEnt. As a welcome, you can claim their New Player Offer, where you can get up to 100 Free Spins in real money bonus. Sign up, make a minimum deposit of £10, and try your luck on the reel on five days within the following 10 days to uncover 5, 10, or 20 Free Spins each time.

Spin Rio

Another top-rated slot site where UK players can enjoy new video slot games such as Fire Joker, Primate King and 6 Fruit Deluxe. The Spin Rio starts you with a good £200 welcome bonus and 100 free spins for selected slots. The offer comes with a 35x wagering requirement. Use code AGRIO and deposit at least £10 to activate the deal.

Spin and Win

Here is the UK’s premium casino for real money online slots – Spin and Win, licensed by the UK Gambling Commission. Enjoy over 500 slots, including new titles and progressive jackpots by industry leaders such as Novomatic, IGT, Red Tiger and more. Use their generous welcome offer with the bonus code AGSPIN to start spinning. Secure a 100% deposit match up to £250, plus 100 free spins on Blueprint slots – subject to terms and conditions.

Virgin Games 

Winning the “Best Overall Slots Site” at the 2022 ERG awards has cemented the Virgin’s reputation as a go-to site for slot lovers. Modern classics like Secrets of the Phoenix and Rainbow Riches play superbly, and their Play’n Go collection (games that feature Free Spins, Expanding Symbols and other bonuses) contains the likes of Eye of Atum and Cat Wild and the Doom of Dead. The Daily Jackpot games are another treasure trove for players. Thighly-rated mobile slot app (iOs and Android) provides quality gaming-on-the-go and Speedy Banking, which means that your winnings will be in your account within hours. Get 100 Free Spins when you deposit and wager your first £10 with the Welcome Offer.  

Rainbow Riches 

Launched in 2019, Rainbow Riches is no longer just a series of hugely-popular slots, it is a great slot casino in its own right.  The Rainbow Riches collection, notably Cluster Magic and Crops of Cash, are some of the most-played games on the site and their Slingo collection, with numerous titles, including Centurion and Deal or No Deal, is a lovely haven for devotees of the slot-bingo hybrid genre. For new players, there are 30 Free Spins up for grabs (on Rainbow Riches, naturally), when you play your 1^st £10.  

Dream Vegas 

Boasting over 2,000 slots alone, Dream Vegas is a serious operation. The Dream Vegas collection is as fresh as they come, featuring the latest big releases, like Judgment Day Megaways from Red Tiger and Densho from Hacksaw Gaming. The new player bonus here is immense, with a 100% Matched Deposit Bonus of up to £300, AS WELL as 150 Free Spins to use on eligible NetEnt games when you deposit and wager your first £20. 

Grand Ivy 

If you want a plush and luxurious slot experience, these guys are for you. Launched in 2016, their App rates 4.4/5 on the Apple Store and the “New” section in the slots collection never drops below 40 titles. The latest novel adventures include Big Bass Hold and Spinner from Pragmatic Play and Demi Gods 5, out of the Spinomenal stable. The Jackpot King Progressive pots are enormous, including games like Bison Rising and Funky Pharoah.  A 24/7 Live Chat facility and over 20 payment options indicate this casino’s class and is a must for any slots list.  Their generous Welcome Offer is a 100% Matched Deposit Bonus of up to £300 and £25 Free Spins on Starburst when you play your first £20. A 35x wagering requirement is in place. 

Top Slot Sites and Their Offers

Here is a short list of casinos and bonus information for UK slot players:

• bet365 Games – Up to 100 Free Spins with a minimum deposit of £10.
• Spin Rio – £200 welcome bonus and 100 free spins with a minimum deposit of £10 (code to use: AGRIO, 35x wagering requirement).
• Spin and Win – 100% deposit match up to £250 plus 100 free spins on Blueprint slots with the bonus code AGSPIN (T&C apply).
• Virgin Games – 100 Free Spins with a minimum deposit and wager of £10.
• Rainbow Riches – 30 Free Spins on Rainbow Riches slot with a minimum play of £10.
• Dream Vegas – 100% matched deposit bonus up to £300 and 150 free spins on eligible NetEnt games with a minimum deposit and low wager of £20.
• Grand Ivy – 100% matched deposit bonus up to £300 and 25 free spins on Starburst with a minimum play of £20 (35x wagering requirement).
• Betfred – Play slots with no wager-free spins. Sign up, deposit and get 200 bonus rounds.

Want more bonuses from the new UK casinos? View our list of the best free spins and deposit match promos.

TOP Slots in the UK 

Obviously, this can only be a subjective list, but if you only play these 10 slots online, you are guaranteed a good time. Some are classics; others are the latest hot games with good payouts and free spins in generous bonus rounds.

“Gonzo’s Megaways” – 117,000+ ways to win

Gonzo’s Quest Megaways (Red Tiger/NetEnt) has taken the runaway success of Gonzo’s Quest and souped it up into a Megaways miracle. There are 6 Reels and 117,000+ ways to win. The features are superb, with a 15x Free Fall multiplier. Birds, snakes, and alligators are among the symbols, and the fun little Spanish conquistador always has good company. Look out for his joyous moonwalk on some wins! 

“Starburst” – up to £100 a spin

Starburst (NetEnt) has become somewhat ubiquitous across the industry, but for a very good reason: punters love it. With a simple 5-reel, 10-pay line set-ups, you can punt away at anything from 10p to £100 a go. Bonus Wilds appear in the middle reel, and a mesmeric quality to playing it defies real explanation. A modern cult classic. 

“Immortal Romance” – High RTP of 96.86%

Immortal Romance from Microgaming is a gothic thriller much beloved by slot supremos. It has 243 ways to win over 5 reels, and stakes cover 30p to £30 a pop. The RTP is an excellent 96.86%, and if you hit the 6x Multiplier, the maximum win can jump to 12,000x your stake. A dark and brooding love story, it has arguably out-stripped the Twilight movies that supposedly inspired it.  

“Reactoonz” – Slot with 7×7 grid gameplay

Reactoonz is a jolly and colourful slot from Play’n Go, set on a 7×7 grid with a kooky alien theme. Look out for the Gargantoon that appears as the Wild symbol. The cascading reels give this slot a fast-paced feel, and the 96.51% RTP is spot-on. Stakes cover the 20p-£200 range, and the follow-up game, Reactoonz 2, is also well worth a go once you’ve mastered these whacky critters. 

“Walking Dead” – High-stake 50 pay lines

The Walking Dead is a zombie apocalypse thriller from Playtech with a 95.73% RTP, set over 5 reels and 50 pay lines. The top end of the staking range is a vast £500 a go, making this a must for slot high-rollers. There is a hit frequency of 28.81% on this one, meaning over a quarter of all spins result in a winning combination. Fans of the TV show will love it and look out for the Biohazard Sign Coin that unlocks the jackpot. 

Big Bass Bonanza – UK’s most popular real money online slot

Big Bass Bonanza is the fishy wonder from Pragmatic Play, whose popularity shows no sign of sinking into the murky depths. It has a very decent 96.7% RTP and although it is a low-volatility, relatively simple slot, it has superb playability, with the multi-coloured float the most prized symbol. The jolly soundtrack adds to the fun and has helped make this slot one of the most popular in the industry. 

“The Crypt” – Edgy 46,000+ pay lines slot

The Crypt (No Limit City) is a new slot but already has an army of fans. From one of the more edgy software firms, it delivers over 46,000 pay lines and a very respectable 96.05% RTP. Some reviews describe this as an “extreme” volatility slot, so it is not for the faint-hearted! The idea of half-rotting dead music legends won’t be everyone’s cup of tea, but it is done with such flair and style (not to mention superb graphics), that this macabre melee is well worth peaking into the vault for. 

“Le Bandit” – 6 reels slot with 10,000x stake bonus rounds

Le Bandit from Hacksaw Gaming is another new release from an edgy, boundary-pushing company that has wowed punters. If you fancy joining a robbing raccoon as he ransacks Paris, this is your bag! Set over 6 reels and 5 rows, the maximum win is 10,000x your stake and it is packed with Bonus Features. The colour scheme is 30’s noir, with sepia dominating, and the soundtrack is as cool as a cucumber. The most prized symbol is the Magician’s Hat and its 100x multiplier when you land 13 or more in a cluster. Le Bandit? Mais oui, bien sur, monsieur.  

“Fat Panda” – A 96.07% payout slot machine

Fat Panda is another from the Pragmatic Play stable and a standing dish in many UK online casinos. There are mountains, lanterns and pagodas aplenty in the gorgeous green fields of the Chinese interior. The tubby protagonist is an amiable host, and the 5×3 set-up lends the game a pleasing simplicity. Stakes cover the pocket size of all punters, from 10p-£100 a pop, and the RTP is an acceptable 96.07%. Wilds, Multiplier and Free Spins are up for grabs, all backed by a sweet oriental soundtrack. It is worth a chew on the bamboo. 

“John Hunter” – Egypt theme online slot with free spins

John Hunter and the Book of Tut. This new beauty is cropping up everywhere and is regularly getting 5/5 rave reviews. Designed by Pragmatic Play with a solid 96.5% RTP, it treads the well-worn path to ancient Egypt but does it with flair and innovation. We see distant mountains and the mighty river Nile, rather than the limiting panoply of underground tombs that one is used to in this oeuvre. There are Free Spins, Scatters and Wilds to inflate play, and the game is perfectly pitched to all players, with stakes covering the range from 10p to £100 a go. So, don your Fedora, dust yourself down and get Tut-Tut-tutting. 

What are the different slot types? 

Although slots are an ever-changing and evolving universe, some sub-categories are quite distinct and they provide us with a useful tool to catalogue and curate them. 

Fruit slots

Classic Slots tend to ape the arcade slot machines of old and still retain many of the same symbols. 3-reel slots are rarer nowadays, and the 4 or 5-reelers make up most of the online casino offerings. Playing cards, lemons, cherries, Bars, and 7’s are still spinning on our favourite games, keeping the older, more nostalgic player happy. Games like Jammin’ Jars (Push Gaming), Mystery Joker (Play’n Go) and Fruitoids (Yggdrasil) are great examples. Most of these games will have several Bonus Features, but the rules tend to be simpler than other categories. Unibet is the UK’s site that offers the biggest (2403 games) collection of various slots with good odds and RTP%.

Video slots

These are probably the most populous group of games. They tend to have 5+ reels and a more complicated structure. Players will often need to spend time on them to fully understand every nuance and quirk. Modern classics like Gonzo’s Quest (NetEnt) and Book of Dead (Play’n Go) are fine examples. These days, they can be as much works of art as they are slots. 

Megaways Payout Slots

Megaways refers to a betting engine (started by Big Time Gaming in Australia in 2015) that has become hugely popular on the UK casino scene. It bumps up the number of win-lines enormously, to well over 100,000, and gives punters a genuine chance of a massive win for a minimal stake. Such has been the Megaways success story, which previously successfully slots now have a Megaways version, pleasing an existing audience and winning over a whole new one. Gonzo’s Quest Megaways (Red Tiger & NetEnt) and Buffalo Rising Megaways are prime examples.  

Branded New Slots

4.Entertainment-branded Slots can come from a movie or TV show (such as The Walking Dead), or a music group (Def Leppard:Hysteria) and build the game round an existing story or person. They benefit from having an active audience from the start and, in some cases, an already-defined artistic universe. Think Game of Thrones and Vikings. 

Slots With Jackpots

Progressive Jackpots are a huge part of any slot collection and give players the chance to win big for a small stake. There are a number of different types and the Dual Jackpot range (best seen at industry leaders Bet365) are divided into the Community Jackpots that payout when they hit a certain point (usually £100,000) and the Weekly Jackpots that are won once a week when the clock strikes go. Both types build the more they are played, making them Progressive, and these sit very well alongside the Super Jackpots and Mega Moolah engines that are also available.  

Who are the best slot software designers? 

Beauty is always in the eye of the beholder, so it really depends on what you like. Fortunately, we are spoiled for choice, with solid, dependable firms like NetEnt, Evolution, Pragmatic Play, and Novomatic still churning out quality slots. But many punters are more turned on by the smaller, more boutique firms that often come out of left field with ideas, like Yggrasil, Hacksaw Gaming and No Limit City. Overall, this competitive environment helps to keep all software firms on their toes, which is fantastic news for slots fans. 

Here are some examples of the providers and the type of slots you can play online:

1. Novomatic: This company is renowned for its virtual sports and slots. You might find super popular games like “Book of Ra” and “Lucky Lady Charm.”
2. Microgaming: A veteran in the industry, offering a range of slots and table games. Some popular titles include “Immortal Romance” and “Mega Moolah”.
3. NetEnt: Known for its visually stunning and immersive slots, you might encounter games like “Starburst” and “Gonzo’s Quest”.
4. Evolution Gaming: The go-to provider for live dealer games offering classics like “Live Blackjack” and “Live Roulette”.
5. Big Time Gaming: Inventors of the Megaways mechanic, you might enjoy titles such as “Bonanza” and “Extra Chilli”.
6. Pragmatic Play: Offers a combination of slots and live casino games. Look out for “Wolf Gold” or “Peaky Blinders”.
7. Red Tiger: This provider is known for slots with intricate mechanics, including games like “Piggy Riches Megaways” and “Gonzo’s Quest Megaways”.
8. Blueprint: Specializing in slots, you might enjoy popular titles such as “Fishin’ Frenzy” and “King Kong Cash”.
9. PlaynGo: Another giant in the slots category offering popular titles like “Book of Dead” and “Reactoonz”.
10. Elk Studios: Known for aesthetically pleasing slots; keep an eye out for games like “Ecuador Gold” and “Tahiti Gold”.
11. Bally: A provider with a rich history, offering classics such as “Quick Hit” and “Michael Jackson: King of Pop”.
12. Barcrest: You might stumble upon vintage-style games like “Rainbow Riches” and “Action Bank”.
13. Thunderkick: Expect innovative slots such as “Pink Elephants” and “Birds on a Wire.”
14. IGT: A classic provider offering games like “Cleopatra” and “Wheel of Fortune”.
15. WMS: This provider offers a range of slots, including popular titles like “Raging Rhino” and “Zeus”.

Just Released: Newest Slot Sites

Each casino platform hosting slot gaming has a ‘New’ section, a haven for slot players to explore the latest in gaming. Take, for instance, Winomania.co.uk, this online casino boasting over 40 fresh video slots, including the captivating ‘Rasputin Megaways’. Similarly, Magical Vegas entices with 50+ fresh releases under its ‘New releases’ category. More than 100 new slots are published each week at the UK’s best casino sites.

Our top 10 list includes:

1. “Zodiac”
2. “Sugar Monster”
3. “Amazing Link Zeus Epic 4”
4. “John Hunter and the Book of Tut Megaways”
5. “Book of Mega Moolah – Progressive”
6. “Rainbow Burst”
7. “Frozen Tropics”
8. “Queens of Ra: Power Combo”
9. “Big Bankin Bonanza”
10. “The Goonies: Hey You Guys!”

Casinos That Are Best For Mobile Slots

Play slots on your mobile device, whether using an Android phone or a tablet from Apple. Here is a list of the top recommended casino apps.

Online Slots UK FAQs 

Are all these games and casino safe to play online? Yes. All the casinos are licensed and regulated in the UK by the Gambling Commission, and all the slots use an RNG (Random Number Generator) to ensure that they can never be rigged. 

What are wagering requirements on Free Spins? This refers to the number of times you need to play a stake before you can convert the winnings into cash.  

What is the difference between slots on the desktop and slots on the App/mobile version? These days, very little. Most slots are designed to be played on the go, in line with changing wagering habits.