Short answer: Sweet Bonanza has the highest maximum win in our library at 21,100x the stake. Four slots share second place at 5,000x.
Slots by maximum win
| Rank | Slot | Max win | At a £5 stake | At a £2 stake | Volatility |
|---|
| 1 | Sweet Bonanza | 21,100x | £105,500 | £42,200 | High |
|---|
| 2 | Gates of Olympus | 5,000x | £25,000 | £10,000 | High |
|---|
| 3 | Book of Dead | 5,000x | £25,000 | £10,000 | High |
|---|
| 4 | Fishin' Frenzy | 5,000x | £25,000 | £10,000 | Medium to high |
|---|
| 5 | Fluffy Favourites | 5,000x | £25,000 | £10,000 | High |
|---|
| 6 | Big Bass Bonanza | 2,100x | £10,500 | £4,200 | High |
|---|
| 7 | Starburst | 500x | £2,500 | £1,000 | Low |
|---|
Stake limits: £5 a spin, or £2 for ages 18 to 24. Figures are arithmetic, not a record of wins.
What a maximum win tells you
It is a ceiling, and an extremely remote one. The chance of reaching it on any spin is tiny, and developers rarely publish it. What the number does tell you is how the game is shaped: a 21,100x ceiling can only be funded by long stretches of small returns.
Max win and RTP are separate
Starburst and Book of Dead return almost the same over time, with ceilings of 500x and 5,000x. The higher ceiling does not make Book of Dead more generous; it makes it more uneven.
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More slot lists: Low volatility slots UK, Best slots for beginners UK and Payline 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.
