Owen Sheridan, slot maths writer: RTP, versions and costs
Owen Sheridan writes RTP Finder from Galway. His subject is the arithmetic of online slots: the RTP version a casino runs, what that means to your money, and what a bonus really costs.
Each review and guide on the site is written by Owen, based on studios' published figures and the rules screens and terms of the casinos in question.
By Owen Sheridan · Updated
About Owen Sheridan
For Owen, a figure needs a source. RTPs are found in a game's rules and in the studio's published game info. Rules on bonuses and other limitations are found in the casino terms and conditions, with the clause.
He writes in plain numbers. Instead of using terms like "generous" to describe slots, he figures out what's kept from each €1,000 of spins at each version, allowing the difference between casinos to be expressed in hard numbers.
The method is explained in detail on the how we review page.
What Owen Sheridan writes about
- RTP versions
Which RTP version a casino runs, and how far that version is from the studio's max.
- Bonus cost
Wagering requirements times house edge: an expected average cost to clear a bonus.
- Volatility and swings
What causes real sessions to deviate from RTP, and by how much.
- Withdrawals
Limits, processing times, and win caps, from each casino's terms.
Articles by Owen Sheridan
Casino reviews
Casino rankings
RTP guides
- Bonus buy RTP
- Can casinos change RTP?
- Do demo slots have the same RTP?
- Hit frequency in slots
- Hot and cold slots
- House edge vs RTP
- How to check slot RTP
- Max win slots
- Provably fair explained
- RTP vs volatility
- Slot RTP versions
- Theoretical vs actual RTP
- Wagering requirement calculator
- What is a good RTP for slots?
Contact Owen Sheridan
To correct or clarify a figure, use the contact page.
To read more about the website, see about RTP Finder.