Best RTP Slots | Best Payout Slots in the UK

When we talk about the ‘best payouts,’ we mean the highest share you can hope to receive back, on average and over time, from the money you spend in a game. This usually involves playing a game with the highest possible RTP (Return to Player) percentage.

Let’s take Mega Joker from NetEnt as an example. With an impressive RTP of 99%, it’s one of the best payout slots around right now. Theoretically, you’d expect it to pay out £99 for every £100 spent on average in the long run.

However, this RTP percentage is only a long-term average of all players' bets and winnings. When you play games at slot sites you could win much more than 99% back but, hypothetically, you could also win nothing, 0%.

The bottom line is that the longer you play a game the more likely you are to hit the jackpot but you're also more likely, on average, to end up with 99% of what you bet. While not every spin will be a winner, there's always a chance you’ll win a big payout if you’re lucky.

The best way to think about it is this: high RTP slots are the most generous to players collectively but luck ultimately determines whether you’ll be the one to take home some of that cash pot, and how much you take if and when that happens. If you played a high RTP slot regularly, the chances are that you’d have won more back along the way than if you’d played a low RTP slot. But there’s never any guarantees either way when Lady Luck is involved.  

As you can see, RTP plays a crucial role in telling you how much money, on average, you could expect back on your bets. There are other indicators at play, but this is the main one. 

Before a slot game is released, its RTP is calculated over millions of spins, and the result that spits out varies for each game. This information is then readily available, so it pays to do your homework before playing - and we’re here to get the ball rolling for you. 

One thing we can’t promise to deliver is games with an RTP above 100%. If such slots existed, casinos would lose money on them. They’re still businesses after all, and no sound trader would provide a service at a loss. 

Every online casino game has an RTP, including table games and live titles, but slots generally have some of the highest percentages around. That’s why they’re so popular among casino goers. The industry average for some of the best payout slots UK players can get hold of is 95-96%, but anything above this is impressive.

The easiest way to check the RTP for best payout slots online is to study the payables of each game. 

If it's a game we've written a review for, which includes any of those shown above, follow the link to the dedicated page. We'll not only tell you what the RTP is here, but also detail gameplay features, bonuses, and other key stats.  

1. If it's not a game we have a review for, go direct to a casino site you know and trust. We list some of the best online casinos in the UK right here, so take your pick. 
2.  Find the slot you're interested in and click on the ‘i’ icon beside it. Scroll past symbol payouts and bonus feature descriptions. Providers usually state the default RTP percentage under the game rules section at the bottom of the paytable.  
3. If the paytable on the casino site doesn’t have this information, visit the game developer’s website and check the RTP there. Most game studios make this information public for anyone to access. 

While RTP is important and gives you valuable insight into expected returns, there are other things you need to consider when searching for the best payout slots. Here goes.

RTP and volatility are best friends. 

While RTP can help you find the best online slots that payout the highest percentage of winnings, the volatility influences both the frequency and size of those wins. 

Higher volatility levels indicate riskier gameplay and vice versa; lower volatility slots offer fewer risks. 

Talking about volatility levels, these are the three main types: 

• High volatility: prepare for dry spells – these slots are budget eaters. But the potential payout can be very rewarding when a jackpot hits. 
• Medium volatility: medium volatility slots can frequently offer small and big wins. 
• Low volatility: with low volatility slots, you’ll land modest but frequent wins - perfect for small budgets or newbies. 

Most slot paytables will tell you how volatile the game is, and if not, read our online slot reviews – we always include both RTP and volatility.

Jackpot slots come in two types: fixed and progressive. 

Fixed jackpot slots offer in-game prizes that don’t increase in value. Progressive jackpots, on the other hand, grow as more people play the game and often snowball into millions. 

For example, Jon Heywood won a record-breaking £13.2 million jackpot with just £0.25 on Mega Moolah. 

This is possible because a small percentage of each bet from millions of players worldwide is put aside and added to the jackpot prize total. When someone like Jon wins it, it will reset and climb again. 

While few will win a large jackpot, as fairly volatile slots, progressives are still some of the best payout online slots UK casinos offer. You may be attracted to high-risks games like these, as they offer the chance of a massive payout despite having a lower RTP than most.

If you enjoy playing for big jackpots, these are three games we’d really recommend right now: 

Invented by Big Time Gaming, Megaways is a pretty cool slot mechanic that gives you up to 117,649 different ways to win on every single spin. 

Dragon Born was BTG’s first Megaways game, but Bonanza made this engine famous. Seeing the appetite for such slots, many developers have remastered many popular titles into Megaways versions.

Visually, they’re very similar to the usual video slots online but don’t use the standard paylines. 

Instead, each time you spin, the size of the reels will change – each reel can have up to seven symbols. This means that sometimes you’ll have more symbols and rows, and other times you will have fewer.

Sounds complicated? It is and it isn’t. You win if you match three or more symbols in a row on neighbouring reels. It’s even better if Megaways slots have tumbling reels, as they can offer multiple wins on the same spin. 

If you’re looking to play Megaways slots, here are some titles we’d point you in the direction of: 

• The Dog House Megaways
• Bonanza Megaways 
• Big Bass Bonanza Megaways 
• Gonzo’s Quest Megaways
• Eye of Horus Megaways

Spins bonuses are a game-changer when it comes to making your funds go further. They’re like little gifts you get from the casino on sign up or when you deposit. 

When joining a new casino with a free spins bonus, you can play slots without dipping into your own funds. Spending less money at the outset is always a good tactic for tipping things in your favour right from the get-go. 

Many of our favourite online casinos regularly give them for free as extra promotions to keep the fun going. Some are free from wagering requirements, so you can keep what you win.

While you’re here, check out these three of the best free spins promos available right now:

Before claiming any spins promo, always remember to rigorously check the bonus terms – not all slots qualify for free spins promotions. What's more, only certain payment methods may unlock the offer, and you'll usually need to make a minimum deposit to kick things off. Still, these deals are an excellent way to get some extra bang for your buck - just check that small print. 

Want to compare games? We designed this tool to help you choose the slot games that best suit your playing style.

To get started, select a few games from our lists above, or any other titles you know and like. The tool will then generate a side-by-side comparison so you can choose based on the online slots’ best payout and other valuable stats. Whatever combination of factors matter to you most, really. 

Note: slot comparison tool will open in a new window. 

When it comes to the best payout slots, online casinos partner with reputable software providers to fill their libraries with the highest-quality content. The more studios each site teams up with, the more slots with high RTPs they can offer, which increases your chances of winning prizes.

So, it’s a good idea to choose a casino with multiple game developers who offer higher RTPs and payouts. and the industry names mentioned below are known for their generosity.

It’s all well and good finding a big payout slot game, but how do you play it smart? Here are the top tips from our casino experts on how to make the most of these titles.

Looking for free bonuses is always a good idea. 

The best-paying slots sites often offer free spins as part of a welcome offer. Some may even have no wagering requirements, allowing you to keep all your winnings.

Still, always remember to read the small print to check the rules, such as game exclusions, validity, winning caps and wagering requirements.

Playing slots in demo mode is a smart move, whether it’s time-tested titles or new releases. This way, you can test every bonus round and feature without risking your money. And if you don’t like it, you haven’t spent a penny on these free slots in the UK.

Not all casinos offer demo play, but if you can, play for fun to see how the game behaves and only then bet real money.

Remember you can play game demos right here on Casinos.com. Just try any of the links beside each slot listed above. It'll take you through to our review for that title where you can also have a spin there and then.

It’s tempting to keep playing even when you are losing. But setting a budget and sticking to it is more fun than chasing losses. 

If you keep landing false or empty spins, it’s time to step back and reevaluate your strategy. You can always try using the casino’s deposit limit tools to help you manage your spending.

Don’t follow the crowd; play games that are right for you.

Work out what kind of games suit your playing style and budget. Do you prefer high-risk games that pay out big but rarely, low-risk games that pay out small but often, or something in between?

Choosing a suitable level of volatility will only improve your gameplay experience.

Remember to gamble responsibly. The best strategy you can have is to know your limits. It’s easy to get over-excited about landing prizes, but make sure you’re not losing more than winning. 

Play smart by setting limits and keeping your budget in check. Gambling is meant to be fun, but if it’s not anymore, be ready for a quick cool-off.