A payout percentage is the rate a casino pays out winnings versus the amount of real cash deposits being made by players. It's your indication of how likely you are to win if you play at the casino. A good win rate is considered to be 95% or above. This is positive for online casino players when you consider the average win rate at a land-based casino is around 70%. All licensed casinos are required to routinely publish their payout percentages in order to keep their license.