Best RTP Slots | Best Payout Slots in the UK (2026)

Ever looked at two slots and wondered why one eats your balance in minutes and the other keeps you going? That's RTP, and it varies a lot from game to game, even across the best slot sites in the UK. The higher it is, the more play you get for your money. Below are the best payout slots I've found, from 96% all the way up to 99%.

There are thousands of slots on casinos and slot apps, and they all have different RTPs. RTP stands for Return to Player, and it tells you how much of your money a slot pays back over time. 

Most slots sit around 95-96%, which is fine, but the best RTP slots in the UK all go above 97%, and those are the ones in the table below. That extra 1-2% might not sound like much, but it means you lose less of your money per spin, so your balance lasts longer and you get more playing time.

I put some of the high RTP slots in one place so you can compare them without having to check every casino yourself.

A Closer Look at Our Top 10 Highest RTP Slots

Each of these high RTP slots has its own theme and features, from vampire hunts and train heists to underwater adventures and carnival mystery wins. I've reviewed each one below.

Best Payout Slots in the UK

The highest RTP slots above offer the best possible return, but they can be hard to find at some casinos. If you can't find them, the best paying slots in the table below are a great alternative. They all have RTPs over 96% which is higher than average, and you'll find them at most UK online casinos. 

These are some of the best payout online slots if you want a good return without having to search around.

Where Can You Play the Best Payout Slots?

Now that you know which best RTP slots to look for, here are some of the best payout casinos in the UK. Each one has been independently tested and stocks a good range of high RTP slots. We update this list regularly so it may change over time.

When I talk about the highest payout slot machines, I'm talking about the ones with the best RTP. RTP stands for Return to Player and it's the percentage of money a slot pays back over time. Take Mega Joker by NetEnt as an example — with an RTP of 99%, you'd expect it to pay back £99 for every £100 wagered. But that's a long-term average based on millions of spins across all players, not what you'll see in a single session.

You could win way more than that or you could walk away with less. That's just how slots work, whether they're high RTP slots or not. The best way to think about the highest payout slots is that they're more generous than low RTP games over time. But you can still have a bad session on any slot — that's just how it goes.

Most slots sit between 94% and 96% RTP. Anything above 96% is better than average and the best payout slots on this page go all the way up to 99%. On the other end, progressive jackpot slots usually sit below 90% because part of every bet goes into the jackpot pool instead of back to players.

It's worth knowing that casinos can adjust a slot's RTP within a range set by the provider. The best online slots payout percentage can vary from casino to casino – the same game can have an RTP as low as 88% at one site and as high as 98% at another. That's a massive difference. 

For example, the Book of 99 has a top RTP of 99%, but some casinos run it much lower, so you could be playing a completely different game without knowing it.

You don't need a slot RTP checker to find a game's RTP. There are a few easy ways to do it yourself:

• Check Our Reviews: If we've reviewed the game, the RTP will be on the dedicated page along with gameplay features and other key stats.
• Check the Paytable: Click the 'i' icon in the game itself and scroll past the symbol payouts. The RTP is usually listed under the game rules section.
• Visit the Developer's Website: Most game studios publish RTP information publicly, so you can check it directly on their site.
• Visit a Trusted Casino Site: If none of the above work, try a casino you trust. We list some of the best online casinos in the UK if you need a starting point.

RTP tells you how much a slot pays back over time, but it's not the only thing that matters. Volatility affects how that money comes back to you and it changes how a slot feels to play. Even the highest payout slots can feel very different depending on their volatility.

RTP and volatility go hand in hand. RTP tells you how much a slot pays back. Volatility tells you how often and how much you can expect to win.

• High volatility: The best payout slots with high volatility can go through long dry spells. But when you do win, the payouts are bigger. They eat through your balance faster, so they suit players with bigger budgets and more patience.
• Medium volatility: The best RTP slots with medium volatility give you a mix of smaller and bigger wins. A good middle ground if you don't want the extremes.
• Low volatility: The highest payout slot machines with low volatility pay out smaller amounts more often. They're popular with players who want their balance to last longer. If you want the best slot payouts without the wild swings, low volatility is the way to go.

You can see the volatility for every game in our tables above. Most slot paytables will tell you how volatile a game is too. If not, check our online slot reviews – we include RTP and volatility where available..

Free Spins Bonuses

Free spins let you try some of the best payout online slots without risking your own balance. Some casinos even offer free spins no wagering, so you keep what you win. Check out our guide to the best free spins bonuses for what's available right now.

Popular Slot Mechanics

The type of mechanic a slot uses also changes how it plays, even on the best paying slot games. Megaways slots give you up to 117,649 ways to win on every spin, which can lead to bigger payouts on high RTP games. 

Cascading reels let you chain multiple wins from a single spin as winning symbols disappear and new ones drop in. Hold and respin mechanics lock winning symbols in place and give you extra chances. These mechanics don't change the RTP, but they do change how your wins land and how fast your balance moves.

Now that you know the best RTP slots to play, here's how to make your money go further on the best paying slot games.

1. Look for Slot Bonuses: Before you start playing any of the best paying slot games on this page, check if your casino has any slot bonuses you can claim. The best payout casino sites in the UK often offer free spins as part of a welcome offer and some come with no wagering requirements, so you keep what you win. Always read the terms first though.
2. Try Slot Demos: Playing the best pay out slots in demo mode is a smart move, whether it's a game you know or something new. You can test every bonus round and feature without risking your money. Not all casinos offer demo play, but if yours does, try it before switching to real money slots online.
3. Start with Low Stakes: Try a few spins at the lowest stake before increasing your bet. It gives you a feel for the game's volatility and bonus features without burning through your balance.
4. Pick the Right Volatility: Before you pick a game, check its volatility. Do you want big wins that come less often, or smaller wins that come more regularly? We've listed the volatility for some of the best paying slot machines in our tables above, so have a look and see what suits you.
5. Gamble Responsibly: Set your limits before you start and don't chase losses. If you're not having fun anymore, stop. Most casinos have deposit limits, session reminders and cool-off periods that can help. Even the high RTP slots in the UK won't be worth it if you're spending more than you can afford.
6. Manage Your Bankroll: It's tempting to keep playing when you're losing, but setting a budget and sticking to it beats chasing losses every time. Even at the casinos with highest slot payouts, you can still have a bad run. If you keep landing empty spins, step back and take a breather.