AnswerBig Bass Bonanza has the best default RTP of seven popular slots at 96.71%. Sweet Bonanza is unranked because sources quote two figures.
Ranked on: Developer's default RTP, each confirmed against two sources.
The ranking
- 01
Big Bass Bonanza
Pragmatic Play. High volatility. Max win 2,100x.
- 02
Gates of Olympus
Pragmatic Play. High volatility. Max win 5,000x.
- 03
Book of Dead
Play'n GO. High volatility. Max win 5,000x.
- 04
Fishin' Frenzy
Blueprint Gaming. Medium to high volatility. Max win 5,000x.
- 05
Starburst
NetEnt. Low volatility. Max win 500x.
- 06
Fluffy Favourites
Eyecon. High volatility. Max win 5,000x.
Check the version
| Slot | Default | Lower settings |
|---|
| Big Bass Bonanza | 96.71% | 95.67% |
|---|
| Gates of Olympus | 96.50% | 95.51%, 94.5% |
|---|
| Starburst | 96.09% | Down to about 90% |
|---|
| Fluffy Favourites | 95.39% | 93.29% |
|---|
The help screen in the game shows which version your casino runs.
RTP is not volatility
Starburst and Book of Dead return nearly the same and feel nothing alike.
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Coral Casino ★ 4.3 out of 5
Bet £10 on slots, get 100 free spins
No wageringFree spins
- Wagering
- None
- Minimum
- £10
- Time limit
- 48 hours to accept, then 7 days
- Worked value
- 100 spins at £0.10 (£10 in spins)
Significant terms: 18+. New players only. Offer runs 01/10/2026 to 01/02/2027. Deposit (certain types excluded) and bet £10+ on slot games to get 100 free spins (selected games, £0.10 each, 48 hrs to accept, valid 7 days). No wagering on free spin winnings. Deposits by Neteller, PayPal, Paysafe, Skrill, prepaid cards and certain debit cards do not qualify. Restrictions and T&Cs apply. BeGambleAware.org
Ladbrokes Casino ★ 4.2 out of 5
Play £10 on slots, get up to 500 free spins
No wageringFree spins
- Wagering
- None
- Minimum
- £10
- Time limit
- Claim daily for 10 days; each batch valid 7 days
- Worked value
- Up to 500 spins at £0.10 (up to £50 in spins)
Significant terms: 18+. New customers only, from 14/11/25 until further notice. Certain deposit methods excluded. Deposit and spend £10+ on slots for 50 free spins a day during the first 10 days after first deposit and registration (max 500, £0.10 each, selected games, claim before 23:59 each day, valid 7 days). No wagering. Prepaid cards, PayPal, Paysafe, Neteller, Skrill and Moneybookers deposits do not qualify. Restrictions and T&Cs apply. BeGambleAware.org
PlayOJO ★ 4.2 out of 5
80 free spins, no wagering
No wageringFree spins
- Wagering
- None
- Minimum
- £10
- Time limit
- See offer terms
- Worked value
- 80 spins at £0.10 (£8 in spins)
Significant terms: 18+. First deposit only. Minimum deposit £10. 80 free spins on Big Bass Bonanza, £0.10 each. No wagering requirements; winnings paid in cash. Cannot be used with any other offer. Only available to players who arrive through the designated offer link. Full T&Cs apply. BeGambleAware.org
More rankings: Best casino games for beginners, Best live casino games and Casino games of skill.
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Reading this ranking
A slot's place on this list tells you its price, not its temperament. Big Bass Bonanza and Gates of Olympus are both high volatility, so their generous default RTPs arrive unevenly. Starburst returns slightly less and does so far more steadily.
Go further: Live baccarat UK, Slot paylines and ways UK and How to play craps.
House edges and RTPs are standard published figures for common rules, and are long-run averages. Offer terms dated 5 October 2026. How we check. 18+. Free help: 0808 8020 133 or safer gambling.
