Some players will lose more, while others will lose less and some will win. However, this doesn’t necessarily mean that you can’t make money on a slot machine at all. The online casino keeps the remaining 4%. What do you think happens to the remaining 4%? You guessed it. This means that 96% of all the money that comes into the slot machine is returned to the players. The house edge can be big or small depending on the casino game in question, but there is always a house edge, no matter what game you’re playing.įor example, some online casinos advertise that their slot machines have a return-to-player (RTP) ratio of 96%. Most online casino games are constructed in a way that ensures that the online casino will make money. Although it is technically possible to make money by playing online casino, it should not be viewed as a potential source of income.