Online casinos, also famously called as virtual casinos or internet casinos, are online version of traditional casinos. Online casinos allow gamblers to play and bet on casino games through the Internet.

Online casinos generally recommend odds and payback percentages that are similar to land-based casinos. Some online casinos maintains higher payback percentages for slot machine games, and a few publish payout percentage audit on their websites. Assuming that the online casino is using an properly programmed random number generator, table playoffs like blackjack have an recognized house edge. The payout percentages for these sports competition are established by the rules of the game.