Almost all online casinos offer their gamblers some kind of bonuses. The most common form of casino bonus is the cashable bonus. Cashable bonuses can be cashed out after completing a wagering requirement. These bonuses often restrict play on certain games. Wagers made on roulette or baccarat usually do not count towards the wagering requirement because the player can easily bet on both winning and losing outcomes simultaneously (for example, betting on both red and black in roulette). Non-cashable bonuses are often called "sticky bonuses".

Sticky bonuses can be bet, but not cashed out. When the player makes a withdrawal, the sticky bonus is typically removed from the withdrawal total. That is why these are sometimes known as a "phantom bonuses." There are other kinds of a sticky bonus in which you do not need to exceed your original balance to make a withdrawal. Many online casinos also offer signup bonuses to new players making their first deposit. These bonuses normally match a percentage of the player's deposit and almost all online casino signup bonuses require a minimum amount of wagering before allowing a cash out. Some bonuses require no deposit to claim them. Types of no deposit bonuses include bonuses with no deposit in monetary form, free spins with no deposit (free spins on particular games which allow you to keep the winnings) or a game of a determined period of time with a certain amount of dollars.

The rarest kind of bonuses is cash back bonuses. Cash back bonuses are given following a player loss when a portion of the player's loss is returned. For example some of the online casinos might offer a 15% cash back bonus each week. Any player, who had a loss on that week, would get 15% of his loss back. Any player who had a win over the course of the week would naturally not receive a bonus.