The Best Slot Sites in the UK for September 2023

We compare, rate and share the best slot sites in the UK on this page, helping you rediscover classic slots or try your hand at progressive jackpot slots with huge prizes. Check out the best UK slot sites and claim exclusive slot bonuses below.

Guide to Choosing the Best Slot Sites in the UK

UK slot sites all want your custom but it's not always obvious which are the best for you, the player. And you're not the same kind of slot bettor as everyone else. 

Fortunately, our slot experts scour the web to identify the best slots sites in the UK, plus the best slots, so we can make recommendations based on genuine research. 

We rate and highlight the best UK slot sites for features like welcome bonuses and free spins a little further down this page.

Also, we highlight legitimate and safe slot sites and lead you away from the less trustworthy. We also present you the sites with the best bonuses, free slots, fastest payouts, and best customer service.

Once you've read this guide, you'll be armed with all the information you need to bet on excellent slots at all the best places.

How We Rate the Best Slot Sites in the UK

To rank the best slot sites, one of our slot experts assesses hundreds of leading UK slot sites based on game variety, game quality, user experience, bonuses, and variety and volume of slots. We try to keep our slot site review process the same every time for fairness and consistency. This is how we rate a slot site:

Step 1: we open an account at each site and judge the simplicity of the sign-up process and the security provided.

Step 2: we also test and compare online casino bonus offers among sites.

Step 3: we make deposits using different payment methods and play the site’s games, testing them for fairness, speed, and graphics.

Step 4: we also make withdrawals to assess payout times, and contact customer support to see how competent and friendly they are.

Step 5: what’s more, we consider which sites have something special. For instance, 888casino has a great slots selection but it also has one of the best online poker sites on the same platform, plus a no deposit free spins welcome offer.

The best online slots sites in the UK work well on desktop, Android and iOS devices, while providing great bonuses and convenient banking methods.

We also pay attention to new slot sites UK players can join, so we'll alert you as soon as they launch. Plus, we track established sites to make sure they haven't rested on their laurels.

Our Best UK Slots Site for Bonuses is 888casino

We couldn’t look past 888casino with its 10 no deposit, no-wagering free spins on Holy Mackerel Extreme Fishing every month for the rest of 2023. You don't have to do anything to get the 10 free spins and anything you win with them, you can withdraw straight away!

Mr Vegas is another excellent site for bonuses — when you make your first deposit, you get a 100% matched deposit bonus up to £200, plus 11 wager-free spins. You have to deposit £10 to get this bonus but any winnings you take from the free spins can be withdrawn there and then with no wagering requirements to worry about.

• Need to know: free spins are valid for 24 hours and are each spin is worth £0.10. So, technically, you only have £1 to bet in total, but slot players have won millions from less. Once you've used all your free spins, any winnings are ready to withdraw from your cash balance. 
• Our view: 888casino once again stands out with an attractive slot bonus, which replaces its old 88 no deposit free spins sign up bonus. Any free spins bonus where no deposit and no wagering requirements are required is good in our book. What's more, you get it every month. If you're just signing up to 888casino, you can also claim the welcome bonus featured below:

888 Bonus 100% Welcome Bonus up to £100

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. 18+. Play Safe. 1st time depositor at 888casino only • £20 min deposit • Claim within 48 hrs • Valid for selected games • Bonus wins capped at £500 • 30x wagering – req. vary by game • Bonus expires within 90 days • Payment method & country restrictions apply • Withdrawal terms & T&Cs apply. #ad

Our Best UK Slots Site for Game Selection is Party Casino

Party Casino has more than 5,000 slot games and counting, so it’s an excellent site to bet on slots. Not only that but you can get a £250 bonus when you sign up and deposit.

• Need to know: slot games count 100% to the first deposit bonus wagering requirements of 35x and you have 30 days to unlock the bonus.
• Our view: although Party Casino doesn't have the biggest reputation of UK slot sites, it has virtually everything you could want, not least a diverse game selection, including jackpot slots.

Why not check out Party Casino's welcome bonus below?

Party Bonus 100% Welcome Bonus up to £250

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. UK players only. New customers only. Minimal initial deposit £10. Once the offer is claimed players have 30 days to release equivalent to initial deposit as a cash reward up to £250. 35x wagering requirement before cash rewards applied. Certain deposit options are excluded.

Our Best UK Slots Site for Free Spins is Crystal Slots

Crystal Slots is one of the best online casinos for free spins bonuses. On your first deposit, you can get up to 500 extra spins on Sweet Bonanza. Plus, the casino provides other free spins offers like a spin of the Trophy Mega Reel when you earn five trophies by betting at the site. The mega reel gives up to 500 free spins on the Master Joker or Tree of Riches slots.

• Need to know: 500 free spins is an unusually large amount to claim in a welcome bonus, so it's worth picking up for slot fans. The catch is that what bonus you win is determined by the Trophy Mega Reel. There's also 65x wagering requirements, which is more than usual. 
• Our view: remember it's 'up to 500 free spins', because what you actually get with when you spin the mega reel is all about luck and could be less. We aren't too impressed with the 65x wagering but, if you become a regular slots player, you could get more chances to spin the reel every time you move up a level.

Crystal Slots Bonus Get up to 500 Extra Spins on Sweet Bonanza

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. £10 min fund, Extra spins won via mega reel, 65x bonus wagering requirements, max bonus conversion to real funds equal to lifetime deposits (up to £250).

Our Best UK Slots Site for Progressive Jackpot Games is Mr Vegas

Mr Vegas had, at our latest count, more than 320 jackpot slots for you to choose from – that even impressed our battle-hardened reviewers. It also has a table of the latest jackpots from biggest to smallest, which features a Book of Atem WowPot of £33.3m and a Mega Moolah Lucky Bells jackpot of £6.6m. 

The casino also boasts the progressive jackpot games Mega Moolah: Goddess, Mega Fortune, Ancient Fortunes Poseidon WowPot Megaways, Immortal Romance: Mega Moolah, and Bankin’ Bacon.

You can even play slots alongside live casino games like blackjack or online baccarat casino titles at Mr Vegas.

• Need to know: Mr Vegas has a special, social lobby called Encore, with player versus player competitions and the chance to talk to your opponents. 
• Our view: Mr Vegas isn't the slickest-looking slot site, but it makes up for that with a quality jackpot slot selection and features like its Encore lobby.

Mr Vegas Bonus 100% Welcome Bonus Up To £200 + 11 Wager Free Bonus Spins

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. The Welcome Bonus is only available to newly registered players who make a minimum initial deposit of € 10.

Our Best UK Slots Site for New Slot Games is NetBet

NetBet is a legit casino site for new slots and it even has a New Games tab which makes it easy to find something fresh. When we reviewed the site, some of the featured new games were Secret 7s, Tommy Gun’s Vendetta, Million Zeus, Big Size Fishin’, and Wolf Fang: The Origins.

NetBet also boasts jackpot slots like Gladiator Jackpot and Age of the Gods: Glorious Griffin, plus it has thousands of other slot games to try.

• Need to know: you can get up to 500 free spins with NetBet's current welcome bonus but the amount you get is random. Plus, you have to enable marketing communications or you'll only be entitled to the first 50 free spins. 
• Our view: if you like slots, the chance of grabbing a bonus 500 free spins from your first deposit is very tempting. We also appreciate the quality mix of top jackpot slots and famous slot titles like Starburst and Immortal Romance: Mega Moolah.

NetBet Bonus Up To 500 Bonus Spins

Promo Code: NBWELCOME500

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. £10+ deposit, no e-wallets/prepaid cards, 50x wagering on Vegas Extra Spins, 40x wagering on Casino Extra Spins.

Our Best UK Slots Site for Mobile is Casumo

Casumo, on iOS and Android, is our choice for mobile casino sites, because it has more than 2,000 games, fun daily tournaments, and random cash drops every day. You can also win bonus spins on Sahara Riches Cash Collect in one of the casino's promotions. 

Plus, players have also praised how smooth the Casumo app is, which is a weakness for other casino apps.

• Need to know: Casumo has a rewards scheme where it gives you bonus cash, deposit bonuses, and bonus spins based on your activity. 
• Our view: we like Casumo's modern game selection, its live chat service, and regular offers that keep things interesting. We're looking forward to seeing what Casumo does with its welcome bonuses in future.

Casumo Bonus 100% Welcome Bonus up to £25 + 20 Bonus Spins

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Opt-in required. 20 Bonus Spins on 'Sahara Riches Cash Collect' and 100% Deposit Bonus up to £25 on first deposit. Min deposit £10. 30x wagering requirement for Bonus Spins and 30x wagering requirement for Deposit Bonus (game weighting applies). Max £5/spin or £0.50/line or £10/round (live casino). 30 days expiry.

The Best Online Slots in the UK in 2023

The best online slots in the UK are a matter of personal preference but some slots have proved universally popular over the years. They include classics like Gonzo’s Quest, Mega Moolah, Starburst, and Rainbow Riches. 

You can try demos of these classic slots, plus new online slots, by joining the casinos featured below. Just take note of the casino below each slot to know where to play those titles.

The 10 Best UK Slots in 2023

Starburst

Software Provider

RTP

96.09%

Volatility

Low

Maximum win

£50,000

1. 

   Bally UK Bonus Play £10 Get 30 Bonus Spins

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. #ad. 18+. Gamble Responsibly. Begambleaware.org. New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. Extra Spins: on Secrets of the Phoenix Megaways. Spins value: 20p each. Game availability & restrictions apply

Book of Dead

Software Provider

RTP

96.21%

Volatility

High

Maximum win

£500

1. 

   Buzz Casino Bonus Play £10, Get 200 Extra Spins on Fire Blaze™: Blue Wizard Megaways™

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Deposit & stake £10 on slots get 200 x 10p Fire Blaze™: Blue Wizard Megaways™ spins (x20 WR).

Sweet Bonanza

Software Provider

RTP

96.48%

Volatility

Medium

Maximum win

£2,110,000

1. 

   Buzz Casino Bonus Play £10, Get 200 Extra Spins on Fire Blaze™: Blue Wizard Megaways™

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Deposit & stake £10 on slots get 200 x 10p Fire Blaze™: Blue Wizard Megaways™ spins (x20 WR).

Gonzo’s Quest

Software Provider

RTP

95.97%

Volatility

Medium

Maximum win

£125,000

1. 

   Bally UK Bonus Play £10 Get 30 Bonus Spins

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. #ad. 18+. Gamble Responsibly. Begambleaware.org. New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. Extra Spins: on Secrets of the Phoenix Megaways. Spins value: 20p each. Game availability & restrictions apply

Big Bass Bonanza

Software Provider

RTP

96.71%

Volatility

High

Maximum win

£525,000

1. 

   Buzz Casino Bonus Play £10, Get 200 Extra Spins on Fire Blaze™: Blue Wizard Megaways™

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Deposit & stake £10 on slots get 200 x 10p Fire Blaze™: Blue Wizard Megaways™ spins (x20 WR).

Legacy of Dead

Software Provider

RTP

96.58%

Volatility

High

Maximum win

£500,000

1. 

   Buzz Casino Bonus Play £10, Get 200 Extra Spins on Fire Blaze™: Blue Wizard Megaways™

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Deposit & stake £10 on slots get 200 x 10p Fire Blaze™: Blue Wizard Megaways™ spins (x20 WR).

Gates of Olympus

Software Provider

RTP

96.5%

Volatility

High

Maximum win

£500,000

1. 

   Buzz Casino Bonus Play £10, Get 200 Extra Spins on Fire Blaze™: Blue Wizard Megaways™

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Deposit & stake £10 on slots get 200 x 10p Fire Blaze™: Blue Wizard Megaways™ spins (x20 WR).

Eye of Horus

Software Provider

RTP

96.31%

Volatility

Medium

Maximum win

£50,000

1. 

   All British Bonus 100% Welcome Bonus up to £100 + 10% Cashback

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Welcome bonus for new players only | Maximum bonus is 100% up to £100 | Min. deposit is £20 | No max cash out | Wagering is 35x bonus | Maximum 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.

Fire Joker

Software Provider

RTP

96.15%

Volatility

Medium

Maximum win

£80,000

1. 

   Buzz Casino Bonus Play £10, Get 200 Extra Spins on Fire Blaze™: Blue Wizard Megaways™

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Deposit & stake £10 on slots get 200 x 10p Fire Blaze™: Blue Wizard Megaways™ spins (x20 WR).

Bonanza

Software Provider

RTP

95.98%

Volatility

High

Maximum win

£240,000

1. 

   All British Bonus 100% Welcome Bonus up to £100 + 10% Cashback

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Welcome bonus for new players only | Maximum bonus is 100% up to £100 | Min. deposit is £20 | No max cash out | Wagering is 35x bonus | Maximum 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.

UK Slots with the Biggest Progressive Jackpots

A progressive jackpot slot is a game where the main prize keeps growing until someone wins it and then the jackpot starts to build again. A handful of lucky UK slots players have won mega moolah by playing progressive jackpot slots at UK sites in recent years. 

One of the most famous wins came in 2015, when an English soldier called Jon Heywood won a cool £16 million playing the Mega Moolah slot. 

He staked just 25p on a spin and landed the jackpot, which saw him claim a place in the Guinness Book of World Records. A Belgian player has since topped Jon Heywood’s win, playing Mega Moolah, but many slot lovers are bidding to claim a new record each day.

The 2023 jackpot slots with the biggest prizes at the time of writing are:

1. 💰 WowPot slots - £35m
2. 💰 Mega Moolah - £8.7m 
3. 💰 Jackpot Giant - £6.2m 
4. 💰 Dream Drop slots - £2.5m
5. 💰 MegaJackpots slots - £1.1m
6. 💰 Mega Fortune - £0.8m

• Why not visit the featured online slot sites below, which have excellent jackpot slots line-ups?

CASINO Jackpot Slots Total Slots Total Mobile Slots Total Slot Providers Visit Site

Jackpot Slots 18300

Total Slots 950

Total Mobile Slots 900

Total Slot Providers 10

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. 1st dep only (min £10), max bonus £500, valid 7 days, on selected slots; 40x wagering on the sum of deposit & bonus applies. Max convertible to real is 5x bonus amount received bonus & wins for selected slots only, Full T&C apply.

---

Jackpot Slots 431

Total Slots 4092

Total Mobile Slots 4092

Total Slot Providers 138

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Min deposit £/$/€ 10. Account balance is withdrawable at any time, upon withdrawal, any remaining bonus spins are forfeited. 7 days to activate the spins: Bonus spins expire24 hours after activation. Play responsibly.

---

Jackpot Slots 364

Total Slots 2821

Total Mobile Slots 2821

Total Slot Providers 95

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. This offer is available only for players with address in the United Kingdom. The bonus on deposit doesn't apply to deposits made with Skrill, EcoPayz or Neteller. You need to validate your phone number in order to claim the Welcome Package. The welcome deposit bonus is a 100% bonus up to £20 on your deposit. The minimum deposit to claim the welcome deposit bonus is £10. The welcome deposit bonus must be wagered x48 to be converted to real (withdrawable) money. Full T&C's Apply.

---

Types of Online Slots Bonus

Most sites use an online slots bonus to attract new customers. They vary and they come with different wagering requirements, so it pays to shop around for the best offers. 

No Deposit Bonuses

Some sites offer a no deposit bonus on slots when you sign up for a new account. You might find one at other times but this kind of bonus is rare. One of the few sites that provides a slots bonus where you don’t have to deposit first is 888casino, which currently offers 88 free spins when you open an account with them.

Reload Bonuses

A reload bonus is a deposit incentive and reward aimed at players who have already opened an account with a casino. As an example, a casino might give you a 50% reload bonus up to £200 when you deposit at least £30. This reload bonus is usually awarded as a non-withdrawable amount which must be wagered before it can be withdrawn as cash.

A casino might also give you cashback if you deposit a minimum amount but lose bets during a certain period. For example, if you deposit at least £20 but lose all of that in the next seven days, you could get £2 or 10% back once the week is over.

First Deposit Bonuses

Almost every slot site advertises a welcome bonus to convince bettors to join and these are usually based on your first deposit, or sometimes, up to your first four deposits.

For example, one site might offer a 100% sign up bonus for slots worth up to £500, plus 50 bonus spins. So if you deposit £500, you get £1,000 to play with and 50 extra spins.

• One site that doesn’t provide a welcome bonus is No Bonus Casino – instead, they give you 10% on all losses, forever.

No Bonus Bonus Always 10% Casino Cashback

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Lifetime offer for all customers | no wagering requirements | no max cash-out | gameplay will be reviewed for strategic or abusive play

Daily Free Spins

Some of the best slots sites even offer daily free spins to players. These can be a bonus for betting a certain amount the previous day or week, a cushion if you lose bets, or a large free spins prize that's given over several days.

Loyalty Programmes

The best UK slot sites have a loyalty programme, aka a VIP programme, where you’re rewarded for being a regular bettor. You can earn rewards like lower wagering requirements for bonuses, holiday prizes, a personal customer support assistant, and the ability to use your cash balance online and at land-based casinos.

Wagering Requirements

Another important factor is the wagering requirement, also known as the rollover requirement. This refers to the number of times you need to play this bonus credit before you can make a cash withdrawal. 

Imagine you're renting books from a library. The wagering requirement is like a rule that says you need to read a certain number of pages before you can rent a book, or in this case, withdraw bonus funds.

You keep reading (playing games) until you've read enough pages (bet your bonus money enough times) to meet the requirement. Once you do, you can ‘check out’ your winnings.

If you'd like to know more about how wagering requirements work, you should visit our slots bonus page for a detailed explanation. There, you can also use our wagering calculator to see how much you need to playthrough before you can withdraw any bonus winnings.

• Our wagering calculator also comes in handy with bonuses, and you can find three fantastic ones featured below:

CASINO Bonus Visit Site

Bonus 100% Welcome Bonus Up To £200 + 11 Wager Free Bonus Spins

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. The Welcome Bonus is only available to newly registered players who make a minimum initial deposit of € 10.

---

Bonus 100% Welcome Bonus up to £200

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. £10 min fund, £200 max bonus, max bonus conversion equal to lifetime deposits (up to £250), 65x wagering requirements

---

Bonus 100% Welcome Bonus up to £150 + 50 Bonus Spins

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. 7 days to claim offer and deposit a min of £10 with a further 7 days to wager 35x. Cash stakes only and wagering contributions vary. Max reward £150. 50 wager-extra spins 0.10p each on Big Bass Splash awarded after wagering complete, winnings paid as cash. 3 day expiry.

---

Types of Online Slots

The online slots world keeps growing. Players have more entertaining casino games to choose from than ever, with new themes and technology being introduced all the time. Modern slot games can be divided into several categories:

Classic Slots

These are the original online slot games and they still exist on slot sites, despite becoming dated. Classic slots often have traditional themes and are reminiscent of fruit machines at land-based casinos.

Video Slots

Playing online slots has become more exciting with the release of the video slot, which is now the dominant slot type. Their game mechanics are more evolved than in classic slots, and can feature more paylines and eye-catching bonus rounds. Their improved graphics allow for in-depth characters and themes and the overall experience is more immersive.

Video slots online include 3-reel and the more elaborate 5-reel slots, which contain exciting features like wilds and scatter symbols, with live-action backgrounds and animations.

3D Slots

3D slots take video slots to another level. These cutting-edge games feature characters that feel like they’re jumping out of the screen, making betting on online casino slots almost cinematic. Sometimes these games feature 3D cutaway scenes as part of bonus rounds, while others are a total 3D experience.

The top 3D slots of 2023 include The Rift, Turning Totems, Gonzo’s Quest and Jungle Jim El Dorado.

Live Casino Slot Games

Another recent creation is the live slot game. Like live blackjack and roulette online, these feature a live human dealer who seems to be inside the game, alongside the slot’s virtual character. Good examples of live slot games are Gonzo’s Quest Live from NetEnt and Safari Riches Live by Playtech.

Scatter Slots

A scatter slot is simply a slot game that features scatter symbols, which, if you land them, can help boost your win. They make games more fun and lucrative. These scatters usually tie in with the theme of the slot machine like pyramids in an Ancient Egypt-style game.

Progressive Jackpot Slots

These games are very popular as they give players the chance to win huge prizes from small stakes. Casual players have good reason to think these are the best slots to play for real money, because they stand a chance of banking a big win that previous players have helped grow.

With a progressive jackpot slot, a small portion of each player’s stake contributes to the jackpot, which rises until a player triggers it. There have been several players winning seven-figure and even eight-figure prizes lately. 

Fruit Machines

These slots mimic the machines you find in bars and arcades across the UK, featuring three reels and a payline in the middle. Symbols generally include classics like fruit, bells and the number seven. 

‘Fruities’ give you the option to hold or nudge reels, adding another layer of fun. The best fruit machine games at online slots sites for 2023 include Fruit Shop, Booming 7 and Fruit Fiesta.

Branded Slots

The trend for themed slot games has accelerated. Themed slots are similar to video slots, but they follow a narrative based on a famous movie, TV show, band or another pop culture icon. Some of the best branded slots in 2023 are A Nightmare on Elm Street: Megaways, Britain’s Got Talent, Vikings, and Guns N’ Roses.

Slots RNG (Random Number Generators) and How they Affect Games

A random number generator (RNG) is used to calculate the result each time you hit spin on an online slot game. An RNG is also used on physical slots found in casinos and arcades, and is used to determine the results of online casino games like at online blackjack sites.

The random number generated goes through the game’s software and produces a tangible result, giving you a win or a loss. 

All licensed operators providing for UK players will fall under the jurisdiction of the UK Gambling Commission (UKGC), which monitors the RNG technology that online slots sites use to ensure it remains fair.

Payouts and RTP

The key concept to familiarise yourself with when playing slots online is RTP, which stands for return to player percentage. This percentage refers to the amount of money a slot is expected to return to you over a prolonged period, based on a calculated average.

It essentially refers to the house edge. If a slot has an RTP of 94.75%, it means the average the house claims will be £94.75 for every £100 staked. However, slots are games of chance, so some players will make a profit and others will make a loss. That’s just how it goes. 

The RTP gives you an idea of the average return you can expect. You should look for as high an RTP as possible. NetEnt’s Mega Joker has offered an RTP of up to 99%, while Jackpot 6000 goes up to 98.8%, making these some of the best slot games in terms of RTP.

You will be presented with a payout table when you browse the games at the best online slots sites. It will tell you the symbol values and the paylines, while explaining features and any relevant jackpot information. Payout tables also list the prizes either as a cash amount or as a multiplier. 

For example, if you see ‘100x’, it means you stand to win 100 times the size of your single line bet. It will also inform you of the online slots bonus rounds and the minimum and maximum prizes. You can use this information to determine your potential payouts on new online slots.

• Here are some of the best RTP slots at UK online casinos:

The Best RTP Slots in the UK

Book of 99

Software Provider

RTP

99.00%

Volatility

High

Maximum win

£1,207,000

1. 

   Dream Vegas Bonus 100% Welcome Bonus up to £300 + 150 Bonus Spins

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£100: max £100 bonus + 50 spins on selected games; £101-£200: max £200 bonus + 100 spins on selected games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins credited as bonus and capped at £100. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute to wagering requirement. Bonus funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Full Terms Apply

Money Cart 2

Software Provider

RTP

98.00%

Volatility

High

Maximum win

£1,000,000

1. 

   Dream Vegas Bonus 100% Welcome Bonus up to £300 + 150 Bonus Spins

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£100: max £100 bonus + 50 spins on selected games; £101-£200: max £200 bonus + 100 spins on selected games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins credited as bonus and capped at £100. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute to wagering requirement. Bonus funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Full Terms Apply

Blood Suckers Megaways

Software Provider

RTP

97.66%

Volatility

High

Maximum win

£82,088

1. 

   FruitKings Bonus 100% Welcome Bonus up to £50 + 100 Bonus Spins

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Min £10 deposit & wager. Extra spins on Book of Dead (50 spins on day 1, 25 on day 2, 25 on day 3) 1p coin size. 40x wagering applies. Max cash out £250. Bonus expiry 30 days. Bonus spins expiry 2 days. Game restrictions apply. Full Terms Apply

Jokerizer

Software Provider

RTP

98.00%

Volatility

Medium

Maximum win

£12,000

1. 

   Kwiff Bonus Get up to 200 Bonus Spins

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Wager £/€20 on slots and Get 40 Cash Extra Spins for five consecutive days.* £/€20 stake on slots each day within 5 days of 1st deposit to qualify. £0.1 Spins on Book of Dead. £/€250 total max withdrawal.

Big Bad Wolf

Software Provider

RTP

97.35%

Volatility

Medium

Maximum win

£75,000

1. 

   Buzz Casino Bonus Play £10, Get 200 Extra Spins on Fire Blaze™: Blue Wizard Megaways™

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Deposit & stake £10 on slots get 200 x 10p Fire Blaze™: Blue Wizard Megaways™ spins (x20 WR).

Blood Suckers

Software Provider

RTP

97.99%

Volatility

Low

Maximum win

£50,750

1. 

   Bally UK Bonus Play £10 Get 30 Bonus Spins

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. #ad. 18+. Gamble Responsibly. Begambleaware.org. New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. Extra Spins: on Secrets of the Phoenix Megaways. Spins value: 20p each. Game availability & restrictions apply

Money Cart Bonus Reels

Software Provider

RTP

98.00%

Volatility

High

Maximum win

£1,000,000

1. 

   Dream Vegas Bonus 100% Welcome Bonus up to £300 + 150 Bonus Spins

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. One offer per player. Max bonus bet £5. Offer: 100% bonus match on 1st deposit + bonus spins. Value of bonus & number of spins depend on deposit amount: £20-£100: max £100 bonus + 50 spins on selected games; £101-£200: max £200 bonus + 100 spins on selected games; or £200+: max £300 bonus + 150 spins on eligible NetEnt Games. Winnings from spins credited as bonus and capped at £100. Bonus funds are separate to Cash funds, and are subject to 35x wagering the total bonus & cash. Only bonus funds contribute to wagering requirement. Bonus funds expire within 30 days; bonus spins within 72hrs. Affordability checks apply. Full Terms Apply

White Rabbit Megaways

Software Provider

RTP

97.24%

Volatility

Medium

Maximum win

£348,400

1. 

   All British Bonus 100% Welcome Bonus up to £100 + 10% Cashback

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Welcome bonus for new players only | Maximum bonus is 100% up to £100 | Min. deposit is £20 | No max cash out | Wagering is 35x bonus | Maximum 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.

Jack Hammer 2

Software Provider

RTP

97.07%

Volatility

Low

Maximum win

£990,000

1. 

   Bally UK Bonus Play £10 Get 30 Bonus Spins

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. #ad. 18+. Gamble Responsibly. Begambleaware.org. New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. Extra Spins: on Secrets of the Phoenix Megaways. Spins value: 20p each. Game availability & restrictions apply

Secrets of Atlantis

Software Provider

RTP

97.07%

Volatility

Medium

Maximum win

£128,000

1. 

   Bally UK Bonus Play £10 Get 30 Bonus Spins

   Visit Site

   #ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. #ad. 18+. Gamble Responsibly. Begambleaware.org. New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit. Extra Spins: on Secrets of the Phoenix Megaways. Spins value: 20p each. Game availability & restrictions apply

The Best UK Slots Software Providers

The best UK slots providers compete to launch the most popular games each year and sell to the best slot sites in the UK. And the best online slot sites let you filter games by provider. It's not unusual for players to prefer one slot provider over others, because they tend to create games of a certain style. 

For example, Play'n GO creates slots with interesting stories, incredible graphics, and humour, while NetEnt makes slots, including jackpot slots, that have a certain ingredient that helps some reach legendary status. 

These are the top slot software providers in the industry right now:

Microgaming

The Isle of Man-based firm is one of the largest online slots providers in the UK. It supplies hundreds of titles like Mega Moolah, Game of Thrones, Mermaids Millions and Thunderstruck II.

Playtech

The Matrix, Superman, Top Gun and American Dad are some of the exciting branded casino slots that Playtech has produced. It’s also famous for making Age of the Gods and Big Bad Wolf.

NetEnt

This Swedish software supplier is responsible for some of the best online slots in the UK, including fan favourites Starburst, Gonzo’s Quest and Mega Fortune. It also makes branded video slots, such as Gordon Ramsay’s Hell’s Kitchen.

Play’n GO

This is another Swedish company with a wealth of exciting UK online slots to its name. Play’n GO is responsible for hits, such as Troll Hunters 2, Book of Dead and Mystery Joker.

IGT

International Game Technology or IGT is a multinational firm headquartered in London, with offices in Las Vegas, Rhode Island and Rome. It’s a pioneer in branded video game slots, and its biggest hits include Family Guy, Da Vinci Diamonds, Pharaoh’s Fortune, and Cleopatra.

SG Digital

The digital division of Scientific Games produces several exciting slots after purchasing other providers, NYX Entertainment and NextGen. They include Raging Rhino Megaways, Lucky Lanes, and Prisma Blast.

Novomatic 

Austrian software provider Novomatic celebrated its 40th birthday in 2020. It works with the best slot sites in the UK and releases new online slots on a regular basis. They include Sizzling Hot, Book of Ra and Lord of the Ocean.

Betsoft

This software firm is renowned for quirky releases, such as The Slothfather and Good Girl Bad Girl. It has a particular focus on mobile online slots and casinos and 3D slots.

Slot Tip

You can play free demo games of the best UK slots right here by visiting our free slots catalogue.

Tournaments at UK Slot Sites

The best online slots sites often host tournaments based on a certain slot – typically a classic game or a hot new release. You can join these tournaments and bid to complete the challenges to climb the leaderboard and win prizes. Exciting prizes include cash, trips, cars, and gadgets. 

These online slots tournaments are generally hosted in collaboration with the software provider to boost the profile of a game. They allow players to earn valuable prizes and are worth finding at the best gambling sites for UK slots.

How to Sign Up to Online Slot Sites

You could visit some of the sites above or other casinos featured on this page, and then set up an account and play the best UK slots by following these steps:

• Visit the cashier and make a deposit using your preferred payment method.
• Select a slot that appeals to you, paying careful attention to the payout table.
• Set your coin value, aka your bet, and set the maximum bet per line if you are playing a progressive jackpot slot. Then hit the spin button.
• As long as you’re having fun and betting within your limits, play until you decide to make a withdrawal. Remember that all wins read from left to right.
• Finally, you can visit the cashier to make a withdrawal. Choose your preferred withdrawal method, enter your desired or maximum amount, and confirm. Withdrawals are never instant, and wait times should be clear in the terms and conditions.

Payment Methods at UK Slot Sites

The best slots sites will offer you a wide range of payment methods for making deposits and withdrawals. Debit card payments are popular among visitors to UK slot sites and are widely accepted. 

Common online casino payment methods include e-wallets, such as Neteller or PayPal, but you probably won’t be able to claim a bonus if you opt for Neteller or Skrill as it’s difficult for a casino to track if users have claimed the bonus before.

Vouchers, such as a Paysafecard, are accepted at many new online slots sites, along with other prepaid cards.

In addition, withdrawal times vary depending on the online casino you play at and the withdrawal method you choose.

You might need to make withdrawals via the same method you used to make a deposit, as this is a licensing condition designed to stamp out money laundering.

• Why not visit the casinos featured below? They're known for fast payouts.

CASINO Avg. Withdrawal Time Casino Bonus Visit Site

Avg. Withdrawal Time 24 Hours

Casino Bonus £30 free bingo bonus

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Deposit £10, stake £10 on Bingo, get £30 bonus (x4 Wagering) & £10 Club voucher, &/or stake £10 on slots, get 200 x 10p Fishin’ Frenzy The Big Catch Jackpot King (x20 wagering) & £5 Club slots voucher. Use winnings in cash balance/further deposit to claim both. £5 minimum withdrawal.

---

Avg. Withdrawal Time 24 Hours

Casino Bonus 30 Free Spins after playing through £10

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Min £10 deposit & wager. 30 day expiry from deposit. Extra Spins: on Double Bubble. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply.

---

Avg. Withdrawal Time 24 Hours

Casino Bonus 30 Free Spins on 10 Deposit

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Must opt in. Min £10 deposit & wager. 30 day expiry from deposit. 18+. Extra Spins: on Double Bubble. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. **£10 lifetime deposit for Daily Free Games.

---

Avg. Withdrawal Time 1-3 Days

Casino Bonus 121%ÊWelcome Bonus up toÊ£300

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Min deposit £10. Bonus funds are 121% up to £100. Bonus funds are separate to cash funds and subject to 35x wagering requirement. Only bonus funds count towards wagering contribution. £5 bonus max bet. Bonus funds must be used within 30 days, spins within 10 days. Affordability checks apply.

---

Avg. Withdrawal Time 1-2 Days

Casino Bonus 100% Up To £200

Visit Site

#ad. 18+. Gamble Responsibly. Begambleaware.org. New Customers Only. T&Cs Apply. Welcome bonus for new players only | Maximum bonus is 100% up to £100 | Min. deposit is £20 | No max cash out | Wagering is 35x bonus | Maximum 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.

---