The best online casino sites will tell you the RTP of each casino game they offer. That tells you the theoretical return you could expect if you played the game an infinite number of times. If you play American roulette rather than European roulette, there is also a double zero, which pushes the house edge up to 5.25% on red/black, high/low and odd/even bets.Īnother way to think about the house edge is by considering each casino game’s RTP (Return to Player) ratio. If you spin the roulette wheel an infinite number of times, it should land on the zero 2.7% of the time. For example, there is an inherent house edge on red/black bets in roulette because the ball could land on the green zero. The house edge is the mathematical casino advantage built into a casino game. What is House Edge When Playing at Online Casinos? This guide highlights the casino games with the lowest house edge, and explains the variants of those games you should avoid. You can take steps to reduce the house edge even further by claiming bonuses and applying various strategies at the table. Playing casino games with the lowest house edge gives you a better chance of earning a profit at an online gambling sites.