Your Casino Chooses Your Slot's RTP. Here's What They're Not Telling You.
UK casinos legally run the same slot at 96% or 87% RTP — and never tell you which. RTPTrack shows you exactly what each casino is paying out, in real time.
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Book of Dead: 96.21% at Bet365, 87.25% at Karamba. Same game — £89.60 cost difference per 1,000 spins.
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Why RTP Varies — One Game, Three Numbers
Book of Dead is the same slot everywhere. The deployed return is not.
Top tier
96.21%
at Bet365
Book of Dead's deployed RTP at the UK's top-deploying casino — full theoretical maximum.
Bottom tier
87.25%
at Karamba
Same game, same reels, same sounds. 8.96 percentage points less return on every spin.
Cost of the gap
£896
over 10,000 spins at £1
The deployment choice is the operator's. The cost is yours.
Recent RTP Changes
Verified deployment changes RTPTrack has detected at UK casinos. Most go unannounced.
- 22 Mar 202694.00%←96.10%Source: CoinWind forum
- 15 Nov 2023-2.02pp92.00%←94.02%Source: backinamo.com forum
- 15 Nov 202392.07%←96.50%Source: backinamo.com forum
The UK Average Slot Session
16 minutes · 128 spins · £3.91 lost
Source: UKGC Q3 FY2025-26 (Oct-Dec 2025)
→ Find slots that cost lessMost Checked Slots

Book of Dead
VerifiedPlay'n GO
Theoretical RTP
96.21%
UK range: 96.21% – 87.25%

Gates of Olympus
VerifiedPragmatic Play
Theoretical RTP
96.50%
UK range: 96.50% – 94.50%

Sweet Bonanza
VerifiedPragmatic Play
Theoretical RTP
96.48%
UK range: 96.60% – 91.50%

Starburst
VerifiedNetEnt
Theoretical RTP
96.09%
UK range: 96.10% – 94.05%

Big Bass Bonanza
VerifiedPragmatic Play
Theoretical RTP
96.71%
UK range: 96.71% – 91.48%

Blood Suckers
VerifiedNetEnt
Theoretical RTP
98.00%
UK range: 98.00% – 98.00%

Mega Moolah
VerifiedGames Global
Theoretical RTP
96.42%
No UK data yet

Wolf Gold®
VerifiedPragmatic Play
Theoretical RTP
96.01%
UK range: 96.01% – 93.99%
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Read guideHow RTPTrack Works
We track deployed RTP configurations at UKGC-licensed casinos. We verify through provider tier data, operator disclosures, and independent verification. The published theoretical RTP is the maximum — we show you what your casino actually runs.
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