The Best UK Casinos for High RTP Slots
Our casinos are ranked here by how many of the seven high-RTP slots below each carries, counted from the game lists they publish, and by our rating where the count is level. 14 carry at least one.
The other columns are the operator’s own figures: the highest-RTP slot it names, its average slot RTP, the size of its slot lobby, its overall payout rate and its usual withdrawal time.
Open a row for the rating breakdown. The counts were taken in October 2026; lobbies change, so check the game is there before you deposit for it.
| Rank | Casino Site | Welcome Offer | Rating | High-RTP Slots | Top Published Slot | Slots RTP | Slot Games | Payout Rate | Withdrawal Time | Visit Casino | Read Review | Terms | Rating Breakdown | Highlights | Our verdict |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Mr Vegas | 100% up to £50 + 11 Wager-Free Spins | 4.7Excellentout of 5 | 7 of 7 | Mega Joker (99.00%) | 96.00% | 8900+ | 96.00% | 1–7 days | Play Here | Full T&Cs apply. New players only. Min. dep £10. Wager req. 10x. 18+ T&C's apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
4.3 / 5
Game Range
5.0 / 5
Payments & Payouts
4.5 / 5
Safety & Licence
4.9 / 5
Support
4.2 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 2 | Casumo | 50% up to £100 | 4.4Very goodout of 5 | 7 of 7 | Book of 99 (99.00%) | 96.00% | 4290+ | 96.00% | 1–5 days | Play Here | Read Review | Full T&Cs apply. 18+. New customers only. Opt-in required. 50% Deposit Bonus up to £100 on first deposit. Min deposit £20. 10x wagering on bonus amount. Max £5 per bet. Bonus valid for 7 days. Game, play and payment method restrictions apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
4.3 / 5
Game Range
4.6 / 5
Payments & Payouts
4.4 / 5
Safety & Licence
4.4 / 5
Support
4.2 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 3 | 247Bet | Get 75 Free Spins when You Stake £20 | 4.7Excellentout of 5 | 6 of 7 | Book of 99 (99.00%) | 96.00% | 2900+ | 96.00% | 1–4 days | Play Here | Full T&Cs apply. 18+. New players only. Min. deposit £20. Welcome Offer is 75 free spins on Big Bass Bonanza on your first deposit. To claim the free spins you also need to wager a minimum of £20 of your first deposit on slots. Free spins must be used within 72 hours. Winnings from free spins credited as cash funds and capped at £100. These cash funds are immediately withdrawable. Affordability checks apply. Terms apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
3.0 / 5
Game Range
4.4 / 5
Payments & Payouts
4.3 / 5
Safety & Licence
4.8 / 5
Support
4.2 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 4 | Playzee | 100% up to £25 + 500 Zee Points | 4.6Excellentout of 5 | 6 of 7 | Not published | 96.00% | 2800+ | 94.45% | 1–5 days | Play Here | Read Review | Full T&Cs apply. 18+. New players only. Min deposit £20. Welcome offer is 100% bonus match up to £25. Bonus funds are separate to cash funds and subject to 10x wagering requirement (bonus amount). Only bonus funds count towards wagering contribution. £5 max bonus bet. Bonus funds must be used within 7 days. Affordability checks apply. Terms Apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
4.3 / 5
Game Range
4.4 / 5
Payments & Payouts
4.4 / 5
Safety & Licence
5.0 / 5
Support
4.4 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 5 | BetMGM | Get 200 Free Spins when You Play £10 | 4.6Excellentout of 5 | 6 of 7 | Book of 99 (99.00%) | 95.50% | 2450+ | 97.89% | 1–3 days | Play Here | Full T&Cs apply. New cust only. Opt-in required. Time to deposit/wager 7 days. Deposit £10 & wager 1x on casino games (wagering contributions vary) for 200 Free Spins worth 10p each on Big Bass Splash. 3 day reward expiry. 18+. T&Cs apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
4.3 / 5
Game Range
4.2 / 5
Payments & Payouts
4.4 / 5
Safety & Licence
5.0 / 5
Support
4.4 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 6 | Unibet | Play £30 Get 300 Free Spins | 4.3Very goodout of 5 | 6 of 7 | Blood Suckers (98.00%) | 96.50% | 3980+ | 97.00% | 1–3 days | Play Here | Full T&Cs apply. 18+. New GB customers only. Opt in, deposit & stake £30 on slots to get 300 x £0.10 Free Spins on Big Bass Splash, 10x wagering. Debit card or instant bank transfer only. Claim within 7 days. Spins expire within 48 hours. Game contributions vary, max stake applies. Geographical restrictions and T&Cs apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
4.3 / 5
Game Range
4.5 / 5
Payments & Payouts
4.4 / 5
Safety & Licence
4.8 / 5
Support
4.2 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 7 | BOYLE Sports | Up to 100 Free Spins | 4.8Excellentout of 5 | 5 of 7 | Not published | 96.00% | 800+ | 96.00% | 1–3 days | Play Here | Full T&Cs apply. 18+. Opt in. Acc. games, & payment restrictions apply. 100 Free Spins (FS): Exp. 01.12.26. New UK/ROI gaming players. Same day min. stake req. (£20/50/100 to get 20/50/100 FS) by 23:59. FS Values £0.10. FS valid 72h. Lucky Rush: 06/03/26 - 17/01/27. Min. stake £0.10. Prize paid in GBP/EUR. Win-to-bet ratio points awarded per spin. Points lost if player leaves. Min. 1 point to qualify. Opt into each leaderboard separately. 1 real-money spin to enter. T&Cs Apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
5.0 / 5
Game Range
3.0 / 5
Payments & Payouts
4.4 / 5
Safety & Licence
4.4 / 5
Support
5.0 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 8 | Grosvenor | Deposit £20, Get £40 + 100 Free Spins | 4.4Very goodout of 5 | 5 of 7 | Mega Joker (98.00%) | 96.00% | 3000+ | 97.15% | 1–3 days | Play Here | Full T&Cs apply. +18. New players. Min Dep £20 (Excl. PayPal & PaySafe). Max Bonus £40 on selected games & 100 Free Spins on Big Bass Splash. Wagering & max win apply. T&Cs apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
5.0 / 5
Game Range
3.9 / 5
Payments & Payouts
4.3 / 5
Safety & Licence
4.1 / 5
Support
4.3 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 9 | Coral | Get 100 Free Spins when You Play £10 on Slots | 4.9Excellentout of 5 | 3 of 7 | Not published | 96.00% | 5355+ | 96.27% | 1–5 days | Play Here | Read Review | Full T&Cs apply. 18+. New players only. Deposit (certain types excluded) and Bet £10+ on Slot games to get 100 Free Spins (selected games, value £0.10 each, 48 hrs to accept, valid for 7 days). Restrictions and T&Cs apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
5.0 / 5
Game Range
4.5 / 5
Payments & Payouts
4.7 / 5
Safety & Licence
5.0 / 5
Support
3.8 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 10 | Duelz | Up to 140 Free Spins when You Deposit £25 | 4.9Excellentout of 5 | 3 of 7 | Blood Suckers (98.00%) | 95.14% | 2790+ | 96.00% | 1–3 days | Play Here | Full T&Cs apply. 18+. New players. Min deposit £25. Up to 140 Free Spins (20/day for 7 consecutive days on selected games). Manually claimed daily or expire at midnight with no rollover. Free spin value £0.10. Max winnings £100/day as bonus funds with 10x wagering requirement to be completed within 7 days. Game restrictions apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
4.3 / 5
Game Range
4.2 / 5
Payments & Payouts
4.5 / 5
Safety & Licence
4.9 / 5
Support
4.2 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 11 | Ladbrokes | Get 100 Free Spins when You Play £10 on Slots | 4.8Excellentout of 5 | 3 of 7 | Not published | 95.55% | 3800+ | 96.11% | 1–5 days | Play Here | Read Review | Full T&Cs apply. 18+. New Casino players only. Deposit (certain types excluded) and Bet £10+ on Slots games to get 100 Free Spins (selected games, value £0.10 each, 48 hrs to accept, valid for 7 days). Restrictions and T&Cs apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
5.0 / 5
Game Range
4.3 / 5
Payments & Payouts
4.6 / 5
Safety & Licence
4.7 / 5
Support
3.9 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 12 | Midnite | Bet £20 Get 100 Free Spins | 5Excellentout of 5 | 2 of 7 | Book of 99 (99.00%) | 96.00% | 1600+ | 96.00% | 1–5 days | Play Here | Read Review | Full T&Cs apply. 18+ New customers only. Wager £20 or more on Midnite Casino within 14 days of sign-up. Get 100 Free Spins to use on selected games, valued at 10p and valid for 7 days. T&Cs apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
5.0 / 5
Game Range
3.9 / 5
Payments & Payouts
4.0 / 5
Safety & Licence
4.6 / 5
Support
4.4 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 13 | LeoVegas | Play £10 & Get 50 Free Spins | 4.5Excellentout of 5 | 2 of 7 | Book of 99 (99.00%) | 99.00% | 2970+ | 92.50% - 94.25% | 1–3 days | Play Here | Full T&Cs apply. New cust only. Opt in, deposit £10+ within 7 days of registering & wager 1x on eligible casino games within 7 days to get 50 Wager-Free Free Spins on Big Bass Splash. 3 day expiry. Wagering contributions vary. T&Cs & exclusions apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
4.3 / 5
Game Range
4.3 / 5
Payments & Payouts
4.0 / 5
Safety & Licence
5.0 / 5
Support
4.2 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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| 14 | Virgin Games | Bet £10 Get 70 Free Spins | 4.3Very goodout of 5 | 1 of 7 | Not published | 96.20% | 900+ | 96.00% | 1–4 days | Play Here | Full T&Cs apply. 18+. New members only, must opt in. Not valid with other Welcome Offer(s). Min £10 deposit & £10 wager on slots game(s). 30 day expiry from deposit. Free Spins on Big Bass Splash, 1p coin size, 10 lines, no wagering. T&Cs apply. Please gamble responsibly. GambleAware.org 18+ |
Bonus Value
4.6 / 5
Game Range
3.4 / 5
Payments & Payouts
3.8 / 5
Safety & Licence
4.6 / 5
Support
4.0 / 5
The overall rating is our judgement of the whole casino, not the average of these five scores. |
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We are paid through affiliate links, and that is worth stating plainly. If you open an account after following a link from this page, the operator may pay us a commission. You pay nothing for it and the offer stays the same.
The order of this table is the number of high-RTP slots each casino carries, then our rating of the whole casino; no operator can pay to move up it.
Seven High RTP Slots in UK Lobbies
These are the published figures from each game’s studio, at its highest setting. None of the seven is new: high-RTP slots tend to be older designs with simpler features and modest top prizes.
| Slot | Studio | Published RTP | Volatility | Our casinos carrying it |
|---|---|---|---|---|
| Mega Joker | NetEnt | Up to 99.00% | High | 14 of 15 |
| Jackpot 6000 | NetEnt | Up to 98.90% | High | 8 of 15 |
| 1429 Uncharted Seas | Thunderkick | 98.60% | Low | 11 of 15 |
| Blood Suckers | NetEnt | 98.00% | Low | 8 of 15 |
| Starmania | NextGen Gaming | 97.87% | Low to medium | 5 of 15 |
| Steam Tower | NetEnt | 97.04% | Medium | 8 of 15 |
| Blood Suckers 2 | NetEnt | 96.94% | Low | 8 of 15 |
| RTP as published by the studio for the highest setting. Counts from the game lists our fifteen casinos publish, October 2026. Book of 99 from Relax Gaming also publishes 99%, and five of our casinos name it as their highest-RTP slot. | ||||
Reading the List
Mega Joker’s 99% Is Conditional
The figure is reached in the supermeter mode, at the top stake. The base game returns far less, so a casual session is priced well below the headline.
Supermeter only
Jackpot 6000 Works the Same Way
A fruit machine with a supermeter, at up to 98.9% on its best setting. Like Mega Joker, it rewards reading the help page before the first spin.
Read the rules
Low Volatility Is Common Here
Blood Suckers, 1429 Uncharted Seas and Starmania pay frequent small wins with small top prizes. The high return is spread thinly across many spins.
Small, frequent wins
Older Games, Simpler Features
All seven were released between 2011 and 2017. Newer slots tend to spend more of their return on bonus features and large top prizes.
2011 to 2017
The Same Slot, a Different RTP
Many studios supply a game at several RTP settings, and the casino chooses which one to run. Book of Dead, for example, is published at 96.21% and also supplied at 94.25% and 91.97%.
The difference is invisible on the reels. The place to see it is the game’s own help or information page, which states the RTP for the version you are playing.
How to Check the RTP You Are Getting
- Open the game, then its help page. Look for “return to player” or “RTP”; UK games publish it.
- Compare it with the studio’s figure. If the casino’s version is lower than the figure above, the same game is cheaper elsewhere.
- Check the operator’s average. Our table shows each casino’s published average slot RTP, a rough guide to the settings it runs.
- Read the special modes. Supermeters, gamble features and bonus buys can carry their own figures, and the help page lists each.
What a Higher RTP Is Worth
RTP is a price: the share of stakes the game keeps over the long run is 100% minus the RTP. At 96% the game keeps 4p of every pound staked; at 98% it keeps 2p.
Over 500 spins at 20p, that is £100 staked: about £4 expected cost at 96%, £2 at 98% and £1 at 99%. The swing of any single session is far larger than the difference.
So a high RTP halves the average price of an evening. It does not make a win more likely on any one session, and volatility decides how far the result strays from the average.
What to Take From That
- Treat RTP as a price, not a forecast. It describes millions of spins, not tonight.
- Check the version. The help page shows the setting the casino runs.
- Mind the bonus terms. Some welcome offers exclude high-RTP slots from wagering or weight them low; check the list of excluded games.
- Set a limit before you play. The edge applies whatever the RTP. Deposit limits sit in the account settings.
RTP, Volatility and Hit Frequency
Three figures describe how a slot pays, and they measure different things. A high RTP with high volatility can feel nothing like a high RTP with low volatility.
RTP
The long-run share of stakes returned. Fixed by the game’s design and the setting the casino runs.
The price
Volatility
How the return is paid out: many small wins, or rare large ones. The same RTP can make very different evenings.
The ride
Hit Frequency
How often a spin returns anything. Starburst lands a win on about 22.7% of spins; a high-volatility game may land far fewer.
How often
Max Win
The largest multiple of the stake one spin or feature can pay. High-RTP games often cap it low: Starmania at 500x the stake.
The ceiling
Playing High RTP Slots, in Five Steps
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Pick the Game From the List
Choose one of the seven above, or check a favourite’s published RTP. Our table shows which casinos carry how many of them.
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Check the Version in the Help Page
Open the game and read its RTP. If it is below the studio’s figure, the casino is running a lower setting.
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Read the Special Rules
Supermeter games, gamble features and bonus buys change the return. The help page states the figure for each mode.
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Set the Stake and the Limit
Choose a stake that fits the session, and set a deposit limit at the casino before the first spin.
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Keep the Offer Separate
If you play with a bonus, check whether the game is excluded or weighted low. If it is, play it with your own deposit.
High RTP Terms, in Plain English
- RTP
- Return to player: the share of all stakes a slot is designed to pay back over the long run. 96% is typical in UK lobbies.
- RTP setting
- One of several versions of the same game, each with its own RTP. The casino chooses which one it runs.
- House edge
- What the game keeps over the long run: 100% minus the RTP. A 98% slot carries a 2% edge.
- Volatility
- How the return is spread: frequent small wins at low volatility, rare large ones at high.
- Hit frequency
- The share of spins that return something. It says nothing about the size of the wins.
- Supermeter
- A second mode on Mega Joker and Jackpot 6000, entered with winnings, where the best return applies.
- Max win
- The largest multiple of the stake a single spin or feature can pay.
- Studio
- The company that makes the game and publishes its RTP, such as NetEnt or Thunderkick.
- Game weighting
- How much a game counts towards clearing a bonus. Some offers exclude high-RTP slots altogether.
Where to Go Next
In Short
What to Take Away
- RTP is a price: a 98% slot keeps 2p of every pound staked over the long run, a 96% slot keeps 4p.
- Seven well-known slots publish between 96.94% and 99%; Mega Joker and Jackpot 6000 reach their best figures only in the supermeter.
- The same game can run at a lower setting from one casino to the next. The help page shows the one you are playing.
- A high RTP halves the average cost of an evening; it does not make a win more likely on any one session.
- Check bonus terms before playing these games with an offer, and set a deposit limit first.
Frequently Asked Questions
What is the highest RTP slot in the UK?
What does RTP mean on a slot?
Do high RTP slots pay out more often?
Why is a slot’s RTP different at different casinos?
Where can I check a slot’s RTP?
Is a 96% RTP good?
Every offer, wagering figure and licence number on this page is checked against the operator’s own terms and the UKGC public register before it is published.