Of seven popular slots, Big Bass Bonanza has the highest published default RTP at 96.71%.
Seven slots by RTP.
Payout and volatility.
Checking yours.
In shortOf seven popular slots, Big Bass Bonanza has the highest published default RTP at 96.71%. The version at your casino can be lower, so read the help screen.
Seven slots by RTP
Slot
Developer
RTP
Volatility
Max win
Big Bass Bonanza
Pragmatic Play
96.71%
High
2,100x
Gates of Olympus
Pragmatic Play
96.50%
High
5,000x
Book of Dead
Play'n GO
96.21%
High
5,000x
Fishin' Frenzy
Blueprint Gaming
96.12%
Medium to high
5,000x
Starburst
NetEnt
96.09%
Low
500x
Fluffy Favourites
Eyecon
95.39%
High
5,000x
Sweet Bonanza
Pragmatic Play
Varies by version (96.48% to 96.51% quoted)
High
21,100x
Payout and volatility
RTP says how much comes back over time; volatility says how unevenly. A high-RTP, high-volatility slot can still empty a small balance quickly.
Checking yours
Open the slot, tap the information button and find the RTP line.
Significant terms: 18+. New customers only. Opt-in required. 50% deposit bonus up to £100 on first deposit. Minimum deposit £20. 10x wagering on the bonus amount. Maximum bet or spin £5. Bonus valid for 7 days. Game, play and payment method restrictions apply. Full T&Cs apply. BeGambleAware.org
Read the Casumo reviewLicence: Recro Limited, UKGC account 61549. Offer checked 5 October 2026.
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
Read the Coral reviewLicence: LC International Limited, UKGC account 54743. Offer checked 5 October 2026.
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
Read the Ladbrokes reviewLicence: LC International Limited, UKGC account 54743. Offer checked 5 October 2026.
Scroll to the foot of the casino's site and find the operator's company name and Gambling Commission account number. Search either on the Commission's public register. Confirm that the licence is active, that it covers remote casino, and that the website you are on appears in the list of domain names. If any step fails, leave. The same check works for every casino site, slot site, betting site and bingo site in Britain, and it is the one thing no review can do for you.
How we score casinos
Each of the five casinos is scored out of ten in six categories: the welcome offer and its terms, games, live casino, payments, mobile, and trust and support. The overall score out of five combines them. Scores are desk-based: they draw on each casino's published terms, the public register and recent independent reviews, not on real-money accounts, and we say so wherever it matters. Commission from casinos does not change a score or an order, and the overall score is not a ranking of trustworthiness.
Two things to check for yourself
We have not confirmed two items for any of the five casinos, and both are in the casino's own terms. The first is the customer funds rating: search the terms for 'insolvency' and you will find 'not protected', 'medium protection' or 'high protection'. The second is the dispute resolution service: search for 'dispute' or 'ADR' to find the independent body that hears complaints the casino has not resolved. Both take about a minute.
Licences were confirmed on the Gambling Commission register; regulatory actions were checked against Commission announcements on 8 October 2026; offer terms on 5 October 2026. Items labelled "reported" come from independent reviews, and items labelled "not checked" we have not confirmed. How we check. 18+. Free help: 0808 8020 133 or safer gambling.
Frequently asked questions
Which slots have the best payout in the UK?
Of seven popular slots, Big Bass Bonanza has the highest published default RTP at 96.71%.
Are the casinos here licensed?
Yes; all five licences are verified on the public register.
Do you list unlicensed sites?
No.
When was this checked?
8 October 2026.
How do I check if an online casino is legit?
Find the operator in the footer and confirm it on the Gambling Commission's public register.
How do you rate casinos?
On six published categories, desk-based, with commission having no effect on scores.
Gambling can be addictive. Free, confidential help is available 24 hours a day from the National Gambling Helpline on 0808 8020 133. Visit BeGambleAware.org and GamCare, or block yourself from all UK-licensed gambling sites with GAMSTOP.
This site contains adverts. We may earn commission when you sign up through our links. Advertiser disclosure.
We use no tracking cookies. We store one item in your browser to remember this notice. Casino sites may set their own cookies after you follow an advert link. Cookie policy
