Best UK Online Slots 2023 - Top Slot Casino Games (Real Money)
Play the best real money slots from our shortlist of casinos below. Each site offers hundreds of slot machines from top providers like Microgaming, NetEnt and BetSoft. Compare the best casinos and start playing online slots for real money today!
Best UK online casinos for real money slots in 2023
Unsafe UK slots casinos
Every now and again, we come across a casino that we recommend you avoid playing on. We have a strict 25-step review process, looking at things like a site’s software, promotions, how easy the banking process is, security and more. When any of these steps fall below our standards, the casino is added to our list of sites to avoid.
Best payout slots games for UK players
The following slots are ordered in terms of highest payout percentage:
| Rank | Slot Game | Developer | RTP |
|---|---|---|---|
1 | Bloodsuckers | NetEnt | 98% |
2 | Avalon II | Microgaming | 97% |
3 | Guns N' Roses | NetEnt | 96.98% |
4 | Thunderstruck II | Microgaming | 96.65% |
5 | Wheel of Fortune | IGT | 96.46% |
6 | Mega Fortune | NetEnt | 96.6% |
7 | Starburst | NetEnt | 96.01% |
8 | Gonzo's Quest | NetEnt | 96% |
9 | Book of Ra | Novomatic | 96% |
10 | Wizard of Oz | WMS | 95.99% |
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Types of UK slot machines
In the world of online gambling, online slot games come in four categories: three-reel, multi-reel, video slots and progressive slots. Take a look at the varieties below for an introduction to the different types of slot machines in the UK.
- Three-reel classics
- Multi-reel slots
- Video slots
- Progressive slots
Best UK slots bonus
The best slots casinos will offer UK players a welcome bonus for registering. Typically, this bonus will be a percentage of your first deposit. In some cases, bonuses can be from 50-200% – a huge sum to play with!
Use our calculator to find the best slots bonus for your bankroll. Some casinos will also offer free spins on top of the bonus. It’s good to hunt around to find the promotion that lets you make the most of your bankroll.
Look out for online casinos with big sign-up bonuses and low wagering requirements to maximise the amount of real money you have available to play with.
Bonus Calculator
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Play Free Online Slots
At Casino.org, we have a whole host of top-rated free slots from the world's most exciting online casinos, which you can play right here. These exclusive free games are available to play instantly, whether at your desk or on your mobile, as there’s no registration or requirement to download an Android or iPhone app. Play for fun, practise your strategy or use these games to test the latest releases from leading slots developers. Try your luck at the free games to get started!
What a top UK slots casino can offer
Hundreds of free slots
All the shortlisted online casinos here offer a great variety of slot machines for players to enjoy, including classic and video variations, with plenty of different themes to choose from. You can expect a thrilling experience and a range of top 3 reel and 5 reel titles. We look out for casinos that offer free slots so you can spin the reels for fun, plus offer real money casino games if you prefer the thrill of gambling for real cash!
Safe and secure software
The best gambling sites will of course have games software from top developers, such as Playtech, BetSoft and Microgaming. You can be sure to find slots with great graphics and plenty of dynamic features that will run smoothly, whether it’s a desktop, iPhone or mobile device that you’re using. When you play online slots for real money, you'll want to be reassured that your money is in good hands. You can rely on our recommendations being licensed by the relevant gaming authorities, and guaranteeing a fair game using random number generators to put out those winning combinations on the reels.
Top welcome bonuses
A generous welcome bonus is a must for any reputable online casino. This is particularly true when it comes to slots, so you can get in plenty of extra spins. All our top-rated sites offer excellent bonuses for a great start to your online slots experience. The games themselves all offer high payout percentages to give you the best return on your bet, and cashing out any big win is very easy with all popular banking options. If you’re a winner, you can expect any funds to be in your account within hours.
Real money vs. Free Games
While free slots are a great way to play just for fun and to hone your skills before spending real cash, nothing quite compares to the thrill and excitement of real money gambling. As you can see from the table below, both real money and free games come with their own advantages and disadvantages.
| Real money slots | Players have the opportunity to win huge sums of cash, adding a massive element of anticipation to the gameplay | Real money players are rewarded with welcome bonuses, free spins and loyalty rewards | Real money gaming can see players lose huge sums of hard-earned cash if they don't play responsibly | Players have the opportunity to play for progressive jackpots | Payouts sometimes won't be received instantly, and will instead take a few days depending on the casino |
|---|---|---|---|---|---|
| Free games slots | Available to play instantly with no app download or sign-up required | Give players the chance to try games out before spending their money | Free play gamers often do not qualify for casino bonuses and loyalty rewards | Can be played anonymously with no need to divulge personal information or bank details | Players miss out on the chance to win huge jackpots and other big prizes |
| Real money slots | Free games slots |
|---|---|
| Players have the opportunity to win huge sums of cash, adding a massive element of anticipation to the gameplay | Available to play instantly with no app download or sign-up required |
| Real money players are rewarded with welcome bonuses, free spins and loyalty rewards | Give players the chance to try games out before spending their money |
| Real money gaming can see players lose huge sums of hard-earned cash if they don't play responsibly | Free play gamers often do not qualify for casino bonuses and loyalty rewards |
| Players have the opportunity to play for progressive jackpots | Can be played anonymously with no need to divulge personal information or bank details |
| Payouts sometimes won't be received instantly, and will instead take a few days depending on the casino | Players miss out on the chance to win huge jackpots and other big prizes |
Other casino games
Slots strategy
Online slots are entirely reliant on chance, but that doesn’t mean there aren’t things you can do to put yourself in a better position to win. Experienced players follow a distinct strategy, like only playing games with the highest payout percentages, practising their bonus rounds and knowing their paylines inside and out. Follow these guides to give yourself the best possible chance to win.
As a slots player, the payout percentage tells you how much of your money bet will be paid out in winnings. This means you can work out how much you could win on average. For example, if a slot game payout percentage is 98.20%, the casino will on average pay out $98.2 for every $100 wagered. This is also known as Return To Player (RTP). We outline the RTP for each casino we rate so you can find the payout percentage on a slot machine easily.
UK slots software providers
Online casinos offer an expansive range of video slot titles, many of which come from a handful of industry-leading software developers. When it comes to video slots, these guys really know their stuff. Here are some of our favourites to look out for:
- Real Time Gaming
- Playtech
- Microgaming
- Aristocrat
- IGT
- NETent
- Novomatic
- Merkur Gaming
- NYX
- Betsoft
Best online slots by provider
⭐ NETent | |
❤️ Microgaming | |
🦬 Aristocrat | |
🐪 IGT | |
🔱 Playtech |
Slot game reviews
Still want a little more information before choosing your game? Check out our slot reviews to discover one that’s just right for you.
Browse our full list of slot reviews
UK slots FAQs
How do online slots work?
The basic concept of spinning the reels to match up the symbols and win is the same with online slots as it is in land based casinos. The key difference playing slots online is that the variation of games will be wider, and you'll find that most online slots offer more reels and paylines, so your chances of netting a winning combination increases.
Can I play slots for free?
Yes. Every reputable online slots casino will offer players the option to play some free slot games. This means you won't have to deposit any money to get started, you can simply enjoy the game for fun. But, you won't win any either. Despite that, playing free online slots is a great way to get a feel for casino slot games before you advance to wagering with real money.
What should I look for in an online slot casino?
After security and legitimacy (there are unfortunately a lot of rogue online casinos out there) you want to look at the payout percentage of an online slot. This is the percentage of the wagers paid in that the casino pays out in winnings. This is especially important if you're planning on playing for real money. A higher payout percentage generally means more money back in your pocket.
What’s a progressive jackpot?
This is a jackpot that builds up over time and then pays out a big sum of money to a single player. Most online slots casinos offer progressive jackpot slots so it's worth keeping an eye on the jackpot total and how frequently the game pays out.
Can I win real money playing online slots?
Yes you can. While online casino slots are ultimately a game of chance, many players do frequently win decent sums, and some lucky ones even score life-changing payouts. If you're in it for the big bucks, progressive jackpot slots will probably suit you best.
Are online slot casinos trustworthy?
Absolutely. Provided you play at a recommended online slots casino, and avoid any sites from our list of those to avoid, your personal details and your money will stay perfectly safe online. We independently test and verify every online casino we recommend so selecting one from our list is a good place to start.
How do welcome bonuses work?
Welcome bonuses reward players when they make their first real money deposit. The exact terms and requirements vary from casino to casino and some offers that seem too good to be true probably will be. Before you commit your cash, we recommend checking the wagering requirements of the online slots casino you're planning to play at. These will explain how much of your money you're required to deposit upfront, and what you can expect to receive in return. The best bonuses will offer large payouts on minimal deposits.
Which online slots pay out the most?
Progressive slots games pay out the most money, with Mega Moolah being the record breaker at about £16,705,495. Our list of top-rated online slot casinos shows you the recommended games paying out real money. There are a huge variety of online casino slots paying out varying sums. These include classic three-reel slots, multi-payline slots, progressive slots, and video slots.
How do I pick a winning slot machine?
To try improving your chances of winning a jackpot, choose a progressive slot game with a fairly small jackpot. These games pay out most often. Another method is to pick simpler games. If a game is complex and exciting, software developers have spent more time and money to build it. This could mean frequent wins are less likely. Either way, the slot machine will still be fair and random.
Are online slots rigged?
No, all regulated online slot machines are completely fair. The results are random every time, meaning that nothing in the game is rigged. To ensure fair play, only choose slots from approved online casinos, such as those we list on this page. Playing at any of these will give you a fair chance of winning.
How do I pick a good slot machine?
You need to make sure you are playing slots with high Return to Player (RTP) percentages, advantageous bonuses, good overall ratings and a theme you appreciate. Check out our recommended slots to play in 2023 section to make the right choice for you.
What is the best online slot site?
The one that offers the biggest payouts, jackpots and bonuses along with exciting slot themes and a great player experience. To find out our top casino for this month head to our toplist.
What is the legal gambling age in the UK?
The legal gambling age in the UK is 18. The only exception is licensed family entertainment centres.
Discover the best UK slots sites online
Check out our handy table below, listing the top casinos to play slots games on. Our experts have gathered some of the top information so you can make the best decision for you when you decide where to play slots online.
| Rank | Casino | Number of games | Payout speed | More about the casino |
|---|---|---|---|---|
#1
| Magic Red | 300 | 1-3 days | |
#2
| Mr Mega | 500+ | 1-2 days | |
#3
| Hey Spin | - | 0-1 days |
