Good question. I cannot find what the individual casinos in Ontario have their slot machines set at. The OLG sets the minimum rate of 85% theoretical payout for all slots in Ontario. Meaning if you sat there and pumped in $100 into the machine it should payout $85 back. The casinos can have the manufacturer set the theoretical payback percentage at anything 85% or higher when first installed in the casino. They can also ask the OLG for permission to change the payout % after the machine is installed. This is done by altering the EPROM chip in the machine and can only be done by a licensed technician under direct supervision of the OLG. So what are the actual payout percentages at Ontario casinos?...I cannot find this out.
In Vegas the percent of theoretical payback of the casinos as a location average, are as follows....
Off strip 92.07%
Downtown 91.66%
Strip 91.47%
This is what I found on the OLG website.
"WHAT'S THE PAYBACK PERCENTAGE?
Every slot machine arrives from the manufacturer with a computer chip capable of pre-determining how much of the overall player spend the machine will pay back to players over its lifetime. Machines are set by the casino, also known as the house, to payback a certain percentage of coins played, including paying out the jackpot
The pre-programmed amount that the house keeps is called the hold
The payback percentage, regulated by the Alcohol and Gaming Commission of Ontario (AGCO), is: Minimum: 85%
The payback percentage is meant to be representative of the machine’s entire lifecycle, which can be many millions of spins. When the payback percentage is 85%, this doesn’t mean that you can expect to win back $85 if you gamble $100 on that individual session.
The payback percentage doesn’t affect the short-term. Because of randomness, anything can happen when you play.
Compared to other casino games, slots favour the house more."
Link:
https://www.playsmart.ca/slots/odds/