Reviewed slots ranked by RTP
Sweet Bonanza is not ranked because sources quote two defaults, 96.48% and 96.51%. Either would place it third.
Average cost is the house edge applied to £100 of stakes over the very long run. Any single session can differ enormously.
What "high RTP" and "best paying" mean
"Best paying slots" and "best payout slots" are everyday names for the same thing: games with the highest return to player.
Most online slots are built to return around 96%. A slot above that is cheaper to play over time; a slot below it is dearer. The gap between Big Bass Bonanza and Fluffy Favourites is 1.32 percentage points, or about £1.32 for every £100 you stake.
Default RTP and the version you get
Developers release one game at several RTP levels. The default is the highest standard setting; casinos may choose a lower one.
| Slot | Default | Lower settings reported |
|---|
| Big Bass Bonanza | 96.71% | 95.67% |
|---|
| Gates of Olympus | 96.50% | 95.51%, 94.5% |
|---|
| Starburst | 96.09% | Several, down to 90.05% |
|---|
| Fluffy Favourites | 95.39% | 93.29% |
|---|
| Book of Dead | 96.21% | Not confirmed |
|---|
The version in use is shown in the game's help or information screen. It takes seconds to check and is the only figure that applies to you. The full explanation is in our RTP guide.
RTP is half the picture
Two slots with similar RTPs can behave completely differently. Starburst and Book of Dead are 0.12 points apart on return and worlds apart on volatility. Choose RTP for value and volatility for the kind of session you want.
RTP claims to treat with care
- Figures above 98% often apply to one mode of a game or assume perfect play.
- Some published RTPs belong to feature-buy versions not offered in Britain.
- A 'high RTP slots' list means little unless it says which version each casino runs.
- No RTP makes a slot profitable. Every figure below 100% is a long-run loss.
Where to play
Ad 18+ only. We may earn commission from these links. Advertiser disclosure
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How we check
Slot figures on this site are the developer's published defaults, each confirmed against at least two independent sources. Offer terms are taken from the casinos' published conditions and dated 5 October 2026. Licences are confirmed on the Gambling Commission register. Where sources disagree we say so. The method is on how we check and rate.
Play safely
Slots are fast, and they are designed so the house wins over time. Decide what the session is worth to you before you open a game, set a deposit limit, and stop when the money is gone. Free, confidential help is available from the National Gambling Helpline on 0808 8020 133. Our safer gambling page lists the tools and services.
