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HIGH RTP SLOTS – THE HIGHEST RTP SLOT GAMES AND WHERE TO PLAY THEM

Last Updated: September 3, 2026

Reviewed by Stephen Cummings

Contents:

• Comparison table
• Our real RTP test
• Top 15 high RTP slots reviewed
• New high RTP slots
• Bankroll tips
• Expected session experience
• Where to play high RTP slot games
• Best high RTP slot providers
• How to find the RTP of any slot game
• The relationship between variance and RTP
• Advantages and disadvantages of high RTP slots
• Common mistakes
• Why you should play slots at UK slot sites
• FAQs

Looking for the highest RTP slots? We’ve tested and reviewed 15 high-RTP games available to UK players, comparing their theoretical RTP, volatility, maximum win, betting requirements and features. Where we have played a game ourselves, we’ve also included our first-hand results.

Book of 99, Ooh Aah Dracula and Mega Joker currently offer the highest RTP figures on our list at 99.00%, although two of these require Big Bet Mode to access the 99% configuration.

It’s important to remember that RTP is a theoretical long-term figure rather than a prediction of what you’ll receive during an individual session. Our own 10,000-spin experiment demonstrates just how dramatically short-term results can vary.

RTP means return to player and is the percentage of money a slot is designed to return to players over a large number of spins.

• An RTP of 96% is commonly regarded as high
• An RTP of 97% is particularly high
• Anything over 98% is considered very high

HIGH RTP SLOTS COMPARISON TABLE

SLOT GAME	RTP	MAXIMUM PAYOUT	VOLATILITY	WHERE TO PLAY
Book of 99	99.00%	5,000x	High	Casumo Casino
Ooh Aah Dracula	99.00% (Big Bet Mode)	457x	Medium	All British Casino
Mega Joker	99.00%	200x	High	All British Casino
Jackpot 6000	98.86%	6,000x	High	Pub Casino
1429 Uncharted Seas	98.60%	1,250x	Low	Hyper Casino
Dr Jekyll Goes Wild	98.20%	500x	Low	All British Casino
Marching Legions	98.12%	10,000x	High	NYspins Casino
The Catfather	98.10%	2,251x	Medium	Fun Casino
Test Your Strength	98.05%	71,785x	Low	Grand Ivy Casino
Toro Wilds Reel	98.03%	2,000x	Medium	Casumo Casino
Dragon Dance	98.00%	495x	Medium	Grand Ivy Casino
Rainbow Riches Pick N’ Mix	98.00%	£250,000	Medium	Casumo Casino
Blood Suckers Megaways	97.66%	20,521x	High	Casumo Casino
Esqueleto Explosivo	97.60%	700x	Low	Fun Casino
Fonzo’s Feline Fortunes	96.50%	3,334x	High	Hyper Casino

These aren’t just RTP figures copied from casino listings. Where possible, we play the games ourselves and record our experiences. Our separate real RTP experiment covered 20 slots and 10,000 spins, allowing us to compare advertised RTP with observed results.

OUR REAL RTP TEST

Advertised RTP figures are based on the theoretical long-term return of a slot, but that doesn’t mean every session will produce anything close to that percentage. To demonstrate just how much results can vary in the short term, we carried out our own experiment across 20 different slots and 10,000 spins.

For each game, we recorded the amount wagered and the amount returned, allowing us to calculate the observed RTP from the spins we played. We then compared these results with the advertised RTP of each slot.

The results were surprisingly varied. Some slots returned considerably less than their theoretical RTP during our test, while others returned substantially more. This is exactly what we’d expect from a relatively small sample of spins, particularly on games with higher volatility.

Importantly, our results do not establish the true RTP of any of these games. Thousands of spins are still nowhere near enough to overcome the statistical variance inherent in slot games. Instead, the experiment demonstrates the difference between a slot’s theoretical RTP and what can actually happen during a finite number of spins.

See the full results of our 10,000 spin RTP experiment.

SLOT	ADVERTISED RTP	SPINS	OBSERVED RTP
Aztec Tribute	92.90%	500	146.96%
Book of Dead	91.25%	500	54.90%
Le King	92.25%	500	91.30%
Rainbow Riches Pick N Mix	92.03%	500	178.10%
Marching Legions	98.12%	500	70.88%

These results are from our finite sample of spins and should not be interpreted as evidence that a slot’s true long-term RTP differs from its advertised figure.

HIGHEST RTP SLOTS IN SEPTEMBER 2026

Below we have showcased the highest RTP slot games available to UK players as of September 2026. We have included details about each of the slots as well as exactly where you can play them.

1. BOOK OF 99 BY RELAX GAMING

RTP: 99%

Book of 99 is one of the highest-RTP slots available, with a theoretical RTP of 99.00%. The game revolves around a trail on the left-hand side of the reels which progresses towards 99. Reaching 99 steps triggers the Book of 99 bonus round, although three or more scatters can also trigger the bonus game.

When we played Book of 99 for real money, we found the trail could be frustratingly slow to progress, as reaching all 99 steps can take some time. The ability to trigger the bonus through scatters does, however, provide another way of entering the feature.

The slot has high volatility and a maximum win of 5,000x the stake, with expanding wilds and respins adding to its features. Stakes range from £0.10 to £5 per spin.

Our real RTP test:

Book of 99 was also included in our real RTP experiment. Our observed RTP of 74.05% was well-below the advertised RTP of 99%. This shows how the amount returned during a finite number of spins can differ from the game’s advertised RTP of 99.00%.

Our verdict: The 99% RTP makes Book of 99 particularly interesting for players looking for a high-RTP slot, although its high volatility and slow-moving 99-step trail can make the game frustrating at times.

Book of 99 facts:

• Developer: Relax Gaming
• RTP: 99.00%
• Maximum win: 5,000x
• Volatility: High
• Minimum bet: £0.10
• Maximum bet: £5
• Paylines: 10
• Features: Bonus game, scatters, free spins, expanding wilds and respins

Play at: Casumo Casino

2. OOH AAH DRACULA BY BARCREST

RTP: 99% (BIG BET MODE)

Ooh Aah Dracula is a fun take on the classic horror-themed slot. It is played across five reels and three rows with 10 paylines, combining a relatively simple base game with more modern features such as stacked wild symbols.

The most important thing to know about Ooh Aah Dracula is that its 99.00% RTP is only available in Big Bet Mode. To play with the 99% RTP, you need to select Big Bet Mode and wager the maximum £5 per spin. This means the 99% RTP isn’t available when playing at lower stakes.

The game has medium volatility and a maximum win of 457x your stake. Its features include stacked wilds, respins, free spins and bonus games.

Our verdict: Ooh Aah Dracula is an interesting option for players looking for a very high RTP, but the 99% figure comes with a significant catch: you need to play in Big Bet Mode at £5 per spin to access it.

Ooh Aah Dracula facts:

• Developer: Barcrest
• RTP: 99.00% (Big Bet Mode)
• Maximum win: 457x
• Volatility: Medium
• Minimum bet: £0.10
• Maximum bet: £5
• Paylines: 10
• Features: Bonus game, scatters, free spins, stacked wilds, respins and Big Bet Mode

Play at: All British Casino

3. MEGA JOKER BY NETENT

RTP: 99% (BIG BET MODE)

Mega Joker is designed to recreate the feel of a traditional slot machine, with an old-fashioned style that gives it a very different look from many modern online slots. The game is also known for its progressive jackpot, which has previously paid out more than £100,000.

Mega Joker has a 99.00% RTP in Big Bet Mode, but this higher RTP isn’t available at every stake. Big Bet Mode is activated when betting at least £5 per spin, so players wagering less than this won’t be playing with the advertised 99% RTP.

The game has high volatility and a maximum payout of 200x the stake. It uses five paylines and includes multipliers and a progressive jackpot.

Our verdict: Mega Joker is an interesting choice if you’re looking for a high-RTP slot with a traditional feel. However, as with Ooh Aah Dracula, the headline 99% RTP comes with an important condition: you need to play in Big Bet Mode with a minimum £5 stake per spin.

Mega Joker facts:

• Developer: NetEnt
• RTP: 99.00% (Big Bet Mode)
• Maximum win: 200x
• Volatility: High
• Minimum bet: £0.10
• Maximum bet: £10
• Paylines: 5
• Features: Progressive jackpot and multipliers

Play at: All British Casino

4. JACKPOT 6000 BY NETENT

RTP: 98.86%

Jackpot 6000 has a classic style designed to recreate the feel of playing a traditional slot machine in a land-based casino. It also features a progressive jackpot which can be triggered randomly during play.

With an RTP of 98.86%, Jackpot 6000 has a slightly lower theoretical return than the 99% RTP slots above it on our list. However, unlike Mega Joker and Ooh Aah Dracula, you don’t need to play in Big Bet Mode to access its 98.86% RTP. You can play from just £0.10 per spin while retaining the optimal RTP.

The game has high volatility and a maximum payout of 6,000x your stake, which is where the game’s name comes from. It uses five paylines and also includes multipliers alongside the progressive jackpot.

Our verdict: Jackpot 6000 is a good option if you want a very high RTP without having to commit to the £5-per-spin Big Bet Mode required by some of the other high-RTP slots on this list. Its 6,000x maximum win also gives it considerably more upside than Mega Joker.

Jackpot 6000 facts:

• Developer: NetEnt
• RTP: 98.86%
• Maximum win: 6,000x
• Volatility: High
• Minimum bet: £0.10
• Maximum bet: £2
• Paylines: 5
• Features: Progressive jackpot and multipliers

Play at: Pub Casino

5. 1429 UNCHARTED SEAS BY THUNDERKICK

RTP: 98.60%

1429 Uncharted Seas is a nautical-themed slot played on a classic 5×3 grid with 25 paylines. The game uses expanding wilds as its main feature, while free spins provide an additional bonus round.

With an RTP of 98.60%, it has one of the highest theoretical returns on our list. It also has low volatility, making it an interesting option for players who prefer less pronounced swings between wins and losses.

The maximum win is 1,250x the stake, with bets ranging from £0.10 to £5 per spin.

Our verdict: 1429 Uncharted Seas is particularly interesting because it combines a very high RTP with low volatility. Its 1,250x maximum win isn’t as high as some of the other games on this list, but the lower volatility may appeal to players who prefer a steadier playing experience.

1429 Uncharted Seas facts:

• Developer: Thunderkick
• RTP: 98.60%
• Maximum win: 1,250x
• Volatility: Low
• Minimum bet: £0.10
• Maximum bet: £5
• Paylines: 25
• Features: Expanding wilds and free spins

Play at: Hyper Casino

6. DR JEKYLL GOES WILD BY SCIENTIFIC GAMES

RTP: 98.20% (BIG BET MODE)

Dr Jekyll Goes Wild is a Victorian London-themed slot based on the famous horror character. It has a similar style and feel to Ooh Aah Dracula, with a relatively simple base game combined with modern features.

The slot’s 98.20% RTP is only available in Big Bet Mode, which requires a minimum bet of £5 per spin. This is an important consideration if you’re looking for a high-RTP slot at lower stakes.

One of our favourite aspects of Dr Jekyll Goes Wild is the free spins feature. Landing five scatter symbols can trigger 75 free spins, although getting five scatters is naturally not guaranteed to happen frequently.

The game has low volatility and a maximum win of 500x your stake. It uses five paylines and also features multipliers.

Our verdict: Dr Jekyll Goes Wild combines a high RTP with low volatility and an unusually generous 75 free spins feature. However, the 98.20% RTP is only available in Big Bet Mode, so you’ll need to bet at least £5 per spin to access the optimal RTP.

Dr Jekyll Goes Wild facts:

• Developer: Scientific Games
• RTP: 98.20% (Big Bet Mode)
• Maximum win: 500x
• Volatility: Low
• Minimum bet: £0.10
• Maximum bet: £100
• Paylines: 5
• Features: Free spins and multipliers

Play at: All British Casino

7. MARCHING LEGIONS BY RELAX GAMING

RTP: 98.12%

Marching Legions is a high-RTP slot from Relax Gaming with a striking 3D design and a maximum win of 10,000x the stake. It is played across 243 paylines and has several features, including free spins, multipliers, wilds, stacked wilds, scatters, respins and a Nudge feature.

However, Marching Legions produced one of the biggest differences between advertised and observed RTP in our real RTP test. We played 500 spins, during which the slot returned just 70.88%, compared with its advertised RTP of 98.12%.

This doesn’t mean that Marching Legions has a true RTP of 70.88%. A test of 500 spins is far too small to determine a slot’s long-term RTP, particularly on a high-volatility game. Instead, our result demonstrates just how far short-term results can deviate from the theoretical RTP.

The game has high volatility, stakes from £0.10 to £5 per spin, and a maximum win of 10,000x.

Our verdict: Marching Legions combines a high theoretical RTP with high volatility and a substantial 10,000x maximum win. Our test produced a particularly low short-term return, making it a good example of why the advertised RTP should never be treated as a guarantee of what you’ll receive during an individual session.

Marching Legions facts:

• Developer: Relax Gaming
• RTP: 98.12%
• Our observed RTP: 70.88% after 500 spins
• Maximum win: 10,000x
• Volatility: High
• Minimum bet: £0.10
• Maximum bet: £5
• Paylines: 243
• Features: Free spins, bonus game, multipliers, wilds, scatters, Nudge feature, respins and stacked wilds

Play at: NYspins Casino

8. THE CATFATHER BY PRAGMATIC PLAY

RTP: 98.10%

The Catfather offers more than just its high 98.10% RTP, with stacked wild symbols and progressive multipliers adding extra features to the game. When we played The Catfather for real money, we managed to rack up some impressive wins, including multipliers of 60x and 42x.

The game has medium volatility, which means its wins tend to be more frequent than you would expect from a high-volatility slot, although this doesn’t guarantee that you’ll win within any particular number of spins. Its maximum win is 2,251x your stake.

The Catfather is played on five reels and three rows with nine paylines. The relatively simple layout is complemented by its stacked wilds, progressive multipliers and cat-themed symbols.

Our verdict: The Catfather combines a very high RTP with medium volatility and some interesting multiplier mechanics. Our own play produced 60x and 42x multipliers, making the game particularly memorable, although its 2,251x maximum win is some way below the 10,000x potential offered by Marching Legions.

The Catfather facts:

• Developer: Pragmatic Play
• RTP: 98.10%
• Maximum win: 2,251x
• Volatility: Medium
• Minimum bet: £0.10
• Maximum bet: £5
• Paylines: 9
• Features: Free spins, bonus game, multipliers, scatters, wilds, stacked wilds and progressive multipliers

Play at: Fun Casino

9. TEST YOUR STRENGTH: LUCKY TRAP BY DESIGN WORKS GAMING

RTP: 98.05%

Test Your Strength: Lucky Tap is very different from a traditional slot. There are no conventional reels, rows or paylines; instead, the game uses an instant-win mechanic where the potential payout increases with the size of your bet.

With an RTP of 98.05% and a maximum win of an extraordinary 71,785x your stake, Test Your Strength: Lucky Tap has one of the highest maximum win potentials on this list. The combination of its unusual mechanics and huge potential makes it stand out from more conventional high-RTP slots.

The game has medium volatility, with stakes ranging from £0.10 to £5 per play. As the outcome is entirely luck-based, we’d recommend starting with smaller bets while you get used to how the game works.

Our verdict: Test Your Strength: Lucky Tap is one of the most unusual games on our high-RTP list. Its 98.05% RTP is very high, but the 71,785x maximum win is what really sets it apart. It’s worth remembering that such a huge maximum win doesn’t mean large wins are likely to occur.

Test Your Strength: Lucky Tap facts:

• Developer: Design Works Gaming
• RTP: 98.05%
• Maximum win: 71,785x
• Volatility: Medium
• Minimum bet: £0.10
• Maximum bet: £5
• Features: Free spins, bonus game, multipliers, wilds, scatters and instant wins

Play at: Grand Ivy Casino

10. TORO WILDS REEL BY SYNOT GAMES

RTP: 98.03%

Toro Wilds Reel is a Spanish bullfighting-themed slot from Synot Games with an RTP of 98.03%. Unlike some of the other high-RTP slots on this list, you don’t need to use Big Bet Mode to access this RTP.

One important thing to be aware of is that the RTP can vary between casino sites. We played Toro Wilds Reel at Casumo and confirmed that the game was available at its optimal 98.03% RTP there. It’s therefore worth checking the RTP shown in the game’s information menu before playing, as the casino may offer a different configuration.

The game has medium volatility, 50 paylines and a maximum win of 2,000x your stake. Stakes range from £0.20 to £5 per spin, with features including free spins, bonus games, multipliers, wilds and scatters.

Our verdict: Toro Wilds Reel is an interesting high-RTP option because its 98.03% RTP is available without requiring a £5 Big Bet Mode stake. However, the ability for casinos to offer different RTP configurations means it’s important to check which version you’re playing.

Toro Wilds Reel facts:

• Developer: Synot Games
• RTP: 98.03%*
• Maximum win: 2,000x
• Volatility: Medium
• Minimum bet: £0.20
• Maximum bet: £5
• Paylines: 50
• Features: Free spins, bonus game, multipliers, wilds and scatters

*RTP can vary depending on the casino/game configuration.

Play at: Casumo Casino

11. DRAGON DANCE BY MICROGAMING

RTP: 98.00%

Dragon Dance is a straightforward high-RTP slot played on a 5×3 grid with 243 paylines, making it relatively easy to understand compared with some of the more complicated games on this list. Match five symbols to win, while landing three or more scatters triggers the free spins bonus.

During the free spins feature, payouts receive 3x multipliers, with respins also available.

When we tested Dragon Dance at Casumo, we played mostly at £0.50 per spin, although we increased our stake to £1 at one point. We managed a 40x win after landing four Drum Player symbols alongside a wild. We also triggered the free spins feature twice by landing three scatters, receiving 15 free spins on each occasion. One bonus round produced a decent return, while the other paid very little.

The game has medium volatility and a maximum win of 495x your stake, with bets starting at £0.20.

Our verdict: Dragon Dance is a relatively simple high-RTP slot with some useful bonus features. Our own play produced a 40x win and two free-spin rounds, although the difference between the two bonus results also demonstrates how variable individual sessions can be.

Dragon Dance facts:

• Developer: Microgaming
• RTP: 98.00%
• Maximum win: 495x
• Volatility: Medium
• Minimum bet: £0.20
• Maximum bet: £5
• Paylines: 243
• Features: Free spins, bonus game, 3x multipliers, wilds, scatters and respins

Play at: Grand Ivy Casino

12. RAINBOW RICHES PICK N’ MIX BY BARCREST

RTP: 98.00%

Rainbow Riches Pick N’ Mix combines a simple slot layout with a wide variety of bonus features. Played across 20 paylines, the game offers five different bonus games, and you can choose which bonus you’d like to play before spinning, giving you some control over which feature you want to target.

One of our favourite options is the Road to Riches feature, which offers the potential for some particularly large multipliers.

Rainbow Riches Pick N’ Mix was also included in our earlier real RTP experiment. At the time of that test, the game was configured with an advertised RTP of 92.03%. Across 500 spins, we recorded an observed RTP of 184.07%, meaning the observed result was 92.04 percentage points above the advertised RTP configuration used during that experiment.

The game is currently listed on this page with an RTP of 98.00%, so the historical test result should not be interpreted as a test of the current 98.00% configuration.

This doesn’t mean that Rainbow Riches Pick N’ Mix has a long-term RTP of 184.07%. Our test involved only 500 spins, so the result was heavily influenced by short-term variance. Instead, it demonstrates just how far real-world results can move above or below a slot’s theoretical RTP over a relatively small number of spins.

The game has a maximum payout of £250,000, with bets ranging from £0.10 to £10 per spin.

Our verdict: Rainbow Riches Pick N’ Mix is an interesting high-RTP slot thanks to its five bonus games and the ability to choose which feature you want to target. Its performance in our experiment was particularly remarkable, producing the highest observed RTP of the 20 games we tested.

Rainbow Riches Pick N’ Mix facts:

• Developer: Barcrest
• RTP: 98.00%
• Observed RTP: 184.07%
• Difference from advertised RTP: +86.07 percentage points
• Maximum win: £250,000
• Volatility: Medium
• Minimum bet: £0.10
• Maximum bet: £10
• Paylines: 20
• Features: Five bonus games, free spins, multipliers, wilds, scatters and respins

Play at: Casumo Casino

13. BLOOD SUCKERS MEAGWAYS BY RED TIGER GAMING

RTP: 97.66%

Blood Suckers Megaways is one of the higher-RTP Megaways slots available and is particularly suited to players looking for a combination of high RTP and high volatility. Played across 2–7 reels with up to 117,649 ways to win, the game can produce some substantial wins, although the high volatility also means significant swings.

When we tested Blood Suckers Megaways at Casumo, we confirmed that the game has a maximum payout of 20,521x the stake. During our own play, our biggest win was 45x, which came during the free spins feature.

The game has a 97.66% RTP and high volatility, with bets ranging from £0.10 to £10 per spin. Features include random wilds, super wilds, multipliers, scatters and free spins.

Our verdict: Blood Suckers Megaways is a strong choice if you’re specifically looking for a high-RTP Megaways slot with substantial win potential. Its 20,521x maximum win is impressive, but the high volatility means you should also expect significant swings during play.

Blood Suckers Megaways facts:

• Developer: Red Tiger Gaming
• RTP: 97.66%
• Maximum win: 20,521x
• Volatility: High
• Minimum bet: £0.10
• Maximum bet: £10
• Ways to win: Up to 117,649
• Features: Free spins, random wilds, multipliers, wilds, scatters and super wilds

Play at: Casumo Casino

14. ESQUELETO EXPLOSIVO BY THUNDERKICK

RTP: 97.60%

Esqueleto Explosivo is a Day of the Dead-themed slot from Thunderkick featuring sticky wild symbols, respins and big multipliers. These features combine to give the game a maximum win of 700x your stake.

Esqueleto Explosivo is also one of our favourite low-variance slots with a high RTP. When we tested the game ourselves, we particularly enjoyed its theme and managed several sizeable wins, including a 98x payout.

The game has an RTP of 97.60%, with 17 paylines and stakes ranging from £0.10 to £5 per spin. Its low variance makes it an interesting option for players who prefer less extreme swings than those found in high-volatility slots.

Our verdict: Esqueleto Explosivo combines a high RTP with low variance and some entertaining features. We had a particularly good experience playing it ourselves, including a 98x win, while the sticky wilds, respins and multipliers give the game plenty of ways to produce larger payouts.

Esqueleto Explosivo facts:

• Developer: Thunderkick
• RTP: 97.60%
• Maximum win: 700x
• Volatility: Low
• Minimum bet: £0.10
• Maximum bet: £5
• Paylines: 17
• Features: Free spins, sticky wilds, multipliers, respins and scatters

Play at: Fun Casino

15. FONZO’S FELINE FORTUNES BY PRAGMATIC PLAY

RTP: 96.50%

Fonzo’s Feline Fortunes is a cat-themed slot from Pragmatic Play with adjustable RTP settings of 96.50%, 95.50% and 94.50%. This makes checking the RTP configuration at your chosen casino particularly important.

When we played the game at Casumo, it was set to the lowest 94.50% RTP, which is considerably lower than the maximum available configuration. We also found the game rather tedious during our session, triggering the Future Fortunes respins once but failing to land any wins during the feature. After around 10 minutes of play, we finished £20 down and didn’t trigger a bonus game.

The game has high volatility, so our experience represents only one short session and shouldn’t be taken as an indication of how the game will perform for every player.

Fonzo’s Feline Fortunes has several features, including free spins, Future Fortunes respins, wilds, multipliers and a Double Win feature. The maximum win is 3,334x your stake, with bets ranging from £0.10 to £30 per spin.

Our verdict: Fonzo’s Feline Fortunes has some interesting features, but its adjustable RTP is the biggest thing to be aware of. The maximum RTP is 96.50%, yet we found the game running at just 94.50% at Casumo. If you’re considering playing it, check the RTP configuration before you start.

Fonzo’s Feline Fortunes facts:

• Developer: Pragmatic Play
• RTP: 96.50% / 95.50% / 94.50%
• Maximum win: 3,334x
• Volatility: High
• Minimum bet: £0.10
• Maximum bet: £30
• Paylines: 10
• Features: Free spins, bonus game, respins, wilds, scatters, multipliers, Double Win feature and Ante Bet feature

Play at: Hyper Casino

HOW WE RANK HIGH RTP SLOTS

At SlotsHawk, we don’t judge high RTP slots on their advertised RTP alone. We look at several factors to determine how useful each game is for players looking for a high-return slot.

RTP

The advertised RTP is the starting point when assessing a high RTP slot. We look at the theoretical percentage the game is designed to return to players over a very large number of spins.

However, we also check whether the RTP is adjustable. Some slots are available with multiple RTP configurations, meaning the RTP shown by the game can depend on which casino you play at.

Volatility

RTP doesn’t tell you how frequently a slot pays or how large its wins are likely to be. That’s where volatility comes in.

We consider whether a game has low, medium or high volatility, as this can make a significant difference to the playing experience. A high-RTP slot with low volatility can be very different from a high-RTP slot with high volatility.

Maximum Win

We also consider the game’s maximum potential payout.

A high maximum win doesn’t necessarily make a slot better, but it is useful information for comparing games. We therefore look at the maximum multiplier or maximum cash payout available from each slot.

Features and Gameplay

We assess the features that make each game unique, including free spins, wilds, multipliers, respins, bonus games and other special mechanics.

We also consider how enjoyable and engaging the game is to play rather than simply ranking slots according to their RTP percentage.

Minimum and Maximum Stake

The available bet range is another important consideration.

A slot might advertise an exceptionally high RTP, but if accessing that RTP requires a large minimum stake, it may not be suitable for every player. We therefore include the minimum and maximum stakes for each game and highlight any important betting conditions.

RTP Configuration

Where a game’s RTP can vary, we check which configuration is available rather than assuming that the highest advertised RTP is available everywhere.

For example, some games on this page offer their highest RTP only when playing in Big Bet Mode, while others can be configured to different RTP levels by the casino.

Our Own Testing

Where possible, we test slots ourselves using real money.

We put high-RTP slots to the test ourselves, recording the results from thousands of spins across multiple games. These tests demonstrate how dramatically short-term results can differ from a slot’s theoretical RTP.

We don’t use a 500-spin result to claim that a slot’s true long-term RTP is different from its advertised figure. Instead, we use our testing to provide first-hand evidence of how the games actually performed during our sessions.

HOW THE RANKING WORKS

RTP is the most important factor when selecting the games for this page, but it isn’t the only consideration when deciding their position. We also take into account volatility, maximum win potential, betting requirements, RTP configuration, features and our own first-hand testing where available. This means a slot with a slightly lower RTP can appear above another game if it offers a substantially better overall combination of features, accessibility and player experience.

NEWEST HIGH RTP ONLINE SLOTS

Although slots with high RTP’s of 97% above are rare, the Slotshawk team always keeps an eye-out on all new slot releases so that if one is released, we will be able to tell you about it.

Below, you will find our list of the most recently released slots with above average RTP’s.

Slot Game	RTP
Fonzo’s Feline Fortunes	96.50%
Blazin’ Guns	96.23%

ARE HIGH RTP SLOTS BETTER?

To put this simply, no, slots with high RTP they are not necessarily better to play. It depends on your definition of better. Yes, over millions of spins, the higher the RTP of a slot, the more likely you’ll be to have your money returned to you. But there are a variety of factors involved including variance level which has a strong determining factor as to how likely you are to win from any given slot.

With that being said, if you are stuck on finding a slot to play, you won’t go wrong when picking one with an RTP of 97% or above.

BANKROLL TIPS FOR PLAYING HIGH RTP SLOT GAMES

We advise not diving straight into playing high RTP slots or any slot games for that matter. To give you the best possible chance of an enjoyable experience, you should commit to a maximum spend per session and a maximum session time limit.

• Set a session limit – Before playing, decide how much money and time you’re prepared to spend. Don’t treat a particular number of spins as a target, as the appropriate session length depends on your bankroll, stake size and the volatility of the game.
• Lower stake sizing – The size of your stake depends entirely on your bankroll. Have a bankroll of £500 or lower? Bet no more than £0.20 per spin. You will be surprised how quickly it is to run out of money, especially if you are playing slots with high variance.
• Don’t chase bonus buys – In some slots you will be given the option to buy another spin with your winnings – this is especially common in some NoLimit slots at the end of a bonus game. We recommend not taking this option, when you get a win, don’t risk losing it.
• Use the demo mode to your advantage – You will never be at a disadvantage if you play via demo mode first. This is especially important if you are trying out a slot for the first time. Play on demo mode first so that you know how the slot works and test it for free.

EXPECTED SESSION EXPERIENCE

There is no fixed number of winning or losing spins that you should expect from a slot. Volatility can give you an indication of how widely outcomes may vary, but it doesn’t determine exactly when a winning spin will occur.

A low-volatility slot will generally produce smaller wins more frequently, while a high-volatility slot can produce longer periods without significant wins alongside the possibility of larger payouts.

Our own testing demonstrates why this matters. During our 500-spin tests, observed RTP varied dramatically between games, showing that short-term results can be very different from the theoretical RTP.

WHICH HIGH RTP SLOT IS RIGHT FOR YOU?

If you prioritise:	Consider:
Highest theoretical RTP	Book of 99
Low volatility	1429 Uncharted Seas/Esqueleto Explosivo
Huge maximum wins	Test Your Strength: Lucky Tap
High volatility	Marching Legions/Blood Suckers Megaways
Lower minimum stakes	Book of 99/Marching Legions
Interesting bonus mechanics	Rainbow Riches Pick N’ Mix
First-hand testing	Rainbow Riches Pick N’ Mix/Marching Legions/ Dragon Dance

REAL DATA TESTING

Short-term results can vary massively from advertised RTP figures. Some high RTP slots returned as low as 54.90% during a 500-spin session, whilst others exceeded 170% RTP due to large bonus payouts.

• If you are looking for the biggest payouts: High-volatility slots generally have a greater potential for large individual wins, but those wins can be considerably less frequent. Volatility does not guarantee that a player is more likely to hit the slot’s maximum multiplier. Of course, this is by no means guaranteed, but if that’s what you are after then these slots should appeal to you.
• It helps to either bet small or ensure that you have a large enough bankroll that can withstand the swings.
• Experienced slots players: Players who already know the ins and outs of slots as well as the pros and cons of the different slot features are at an advantage when it comes to any slot games including ones with optimal RTP.

Keep your stake consistent: Changing your stake because you’ve won or lost doesn’t change the underlying odds of the next spin. Choose a stake that fits within your predetermined budget and stick to it rather than increasing bets to chase losses or extend a winning streak.

THE BEST ONLINE CASINOS FOR PLAYING HIGH RTP SLOT GAMES

My most recommended casinos for playing slots are the ones which are UKGC licensed and have libraries full of thousands of slot games. Plus, at all of the slot sites listed below, you can play all of the slots for free once you have registered an account.

• Casumo Casino – With over 1,000 slots available and the opportunity to play them all for free, Casumo is one of the top sites around for British slots players.
• NYSpins Casino – Don’t let the American theme fool you, NYSpins is an excellent platform for British slots players which is licensed by the UK Gambling Commission.
• All British Casino – One of the top slot sites in the UK for over a decade now, All British Casino is catered specifically to UK players and has a huge library of lots of different slots.
• MrQ Casino – A widely recognised UK slot site, MrQ is quintessentially British in its approach to slot games.

WHO ARE THE BEST PROVIDERS FOR HIGH RTP SLOTS?

There are tens of thousands of different slot games, so it should come as no surprise that there is lots of competition between slots developers to produce the top games with as high an RTP as possible. This is great news as it means that casino players like you and me are able to reap the benefits.

Provider	Example high RTP slot	RTP
Relax Gaming	Book of 99	99.00%
Barcrest	Ooh Aah Dracula	99.00%
NetEnt	Mega Joker	99.00%
Thunderkick	1429 Uncharted Seas	98.60%
Pragmatic Play	The Catfather	98.10%
Red Tiger Gaming	Blood Suckers Megaways	97.66%

HOW TO FIND THE RTP ON AN ONLINE SLOT MACHINE

Directly in the casino lobby – Not all online casinos offer this option, but if they do, you do not even have to open the slot game to find the RTP.

ADJUSTABLE RTP RATES

Some of the most well-known slot providers that create slots with adjustable RTP include NetEnt, Microgaming, Play’n GO, NoLimit City, Pragmatic Play and Red Tiger Gaming.

SLOTS WITH THE BEST PAYOUTS

Here are three stronger paying slots – these offer the best potential payouts from a single spin. All of them offer a minimum potential payout of 100,000 x on a single spin.

• Tombstone RIP by NoLimit City: With one of the highest volatility levels ever and played on a 2-3-3-3-1 grid with 108 paylines, Tombstone RIP is big on both features and payouts. It comes with xNudge, xSplit and xBet features and a 9.08% hit rate. Cowboy multipliers include 999x wins too. The payouts can rise all the way up to 300,000x and the RTP is 96.08%.
• Starburst XXXtreme by NetEnt: A sequel to the most popular slot of all time it is played on 5 reels and 3 rows with nine paylines. There is plenty more fun to be had in this one though as expanding wilds and random multipliers are available from just 10p per spin. The wilds alone can combine to create multipliers of up to 450x. Biggest wins go all the way up to 200,000 x per spin.
• Razor Returns by Push Gaming: One of many fishing themed slots, Razor Returns is a simple to play slot played on a 5×5 grid with 40 paylines. Features are aplenty and include Mystery symbols, Nudge and Reveal symbols and Push Bet. Multipliers come into play in both the base game and free spins round and the high RTP rate of 96.55% is helpful. All of these can lead to 100,000 x max bet wins per spin.

THE RELATIONSHIP BETWEEN VOLATILITY AND RTP

Low variance slots are programmed in a way which will give you frequent smaller hits, enabling you to play many spins without the fear of busting. These are games designed for longer sessions as the swings are likely to be much less in comparison with more volatile games.

High variance slots can provide really large hits at the expense of needing to play for a while to access the games bonus features in order to hit the big wins. See which slots offer the biggest volatility swings for yourself via our page dedicated to the top 10 high volatility slots.

All else being equal, a higher RTP gives the player a lower theoretical house edge over a very large number of spins. However, RTP alone doesn’t determine whether a slot is better suited to an individual player, as volatility, maximum win, features and betting requirements can all affect the playing experience.

ADVANTAGES AND DISADVANTAGES

Advantages of high RTP online slots:

• Can be more rewarding in the long run
• Plenty to choose from
• Widely available

Disadvantages of high RTP online slots:

• Some lack the best features

All casino games have pros and cons, you should consider how much fun you are having as the most important aspect.

COMMON MISTAKES

There are certain mistakes that even the most experienced players can make when it comes to playing slot games online. here are some mistakes to avoid:

• Thinking RTP and payouts are the same: You should not be confused between a slots RTP and maximum payout – the are two different things. A slots RTP is the amount it will pay back over an amount of time in comparison to how much you put into the machine. The maximum payout is the absolutely maximum multiplier any given slot machine can trigger.
• Thinking RTP and variance is the same: RTP and variance are also two completely different aspects of online slot games. Variance decides how often a slot game will payout and how big or small the payout will be.
• Raising stakes after losses: it can be easy to go on tilt and increase your bets if you are going through a string of losses or dead spins. The thinking here is usually that you are due a win soon so you may as well bet higher to give yourself a chance of a bigger win. However, slot games are completely and pay no attention to past results.

FAQS

CONTRIBUTORS

Greetings, I’m Stephen Cummings

Stephen Cummings is often referred to as ‘The Oracle’. What he doesn’t know about slot games isn’t worth knowing. He’s our genius slot machine analyst who spends most of his time reviewing new games & sites.

Slots analyst since 2020