Which slot has the highest RTP?

In our library, Big Bass Bonanza at 96.71%.

Can a casino change RTP?

It can choose among the developer's versions.

Does high RTP mean more wins?

No. Win frequency is set by volatility.

High RTP Slots UK: Best Paying Slots by Return

Short answer: Big Bass Bonanza has the highest confirmed default RTP in our library at 96.71%, followed by Gates of Olympus at 96.50%.

Slots ranked by RTP

Rank	Slot	Default RTP	House edge	Average cost per £100 staked	Volatility
1	Big Bass Bonanza	96.71%	3.29%	£3.29	High
2	Gates of Olympus	96.50%	3.50%	£3.5	High
3	Book of Dead	96.21%	3.79%	£3.79	High
4	Fishin' Frenzy	96.12%	3.88%	£3.88	Medium to high
5	Starburst	96.09%	3.91%	£3.91	Low
6	Fluffy Favourites	95.39%	4.61%	£4.61	High

Sweet Bonanza is not ranked: sources quote 96.48% and 96.51%. Either would place it third.

What the gap is worth

Between first and last in the table there are 1.32 percentage points: about £1.32 on every £100 staked, on average, over the long run. Over a few hundred spins that is lost in the noise. Over tens of thousands it is real money.

Default and actual

Slot	Default	Lower settings reported
Big Bass Bonanza	96.71%	95.67%
Gates of Olympus	96.50%	95.51%, 94.5%
Starburst	96.09%	Down to 90.05%
Fluffy Favourites	95.39%	93.29%

The version in use is shown in the game's help screen.

Big Bass BonanzaPragmatic PlayRTP 96.71%Volatility HighMax win 2,100x

StarburstNetEntRTP 96.09%Volatility LowMax win 500x

Sweet BonanzaPragmatic PlayRTP Varies by versionVolatility HighMax win 21,100x

Gates of OlympusPragmatic PlayRTP 96.50%Volatility HighMax win 5,000x

Book of DeadPlay'n GORTP 96.21%Volatility HighMax win 5,000x

Fishin' FrenzyBlueprint Gaming (Reel Time Gaming)RTP 96.12%Volatility Medium to highMax win 5,000x

Fluffy FavouritesEyeconRTP 95.39%Volatility HighMax win 5,000x

RTP explained, high volatility slots and the spin calculator.

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Read the Coral review Licence: LC International Limited, UKGC account 54743. Offer checked 5 October 2026.

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Read the Ladbrokes review Licence: LC International Limited, UKGC account 54743. Offer checked 5 October 2026.

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Read the PlayOJO review Licence: Skill On Net Limited, UKGC account 39326. Offer checked 5 October 2026.

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Read the 10bet review Licence: Blue Star Planet Limited, UKGC account 43173. Offer checked 5 October 2026.

More slot lists: High volatility slots UK, Fishing slots UK and Pays anywhere slots UK.

Slot figures are developers' published defaults, each confirmed against two sources; your casino may run a lower RTP. Offer terms dated 5 October 2026. How we check. 18+. Free help: 0808 8020 133 or safer gambling.

High RTP slots UK

Key takeaways

Slots ranked by RTP

What the gap is worth

Default and actual