Nowadays the cash back bonuses offered by online casinos have become very popular among the players, and every day more casinos are offering their players these type of reward bonuses. A cashback bonus is a type of refund on any money that you may have lost while playing in the casino. In most of the cases the cashback bonus is based on your total net losses over a specific period of time, or it could also be the total losses on a specific online casino game over a given time period. The percentage offered on the cashback bonus will vary from casino to casino, but it's usually between 10% and a 25%, which is a great little bonus if you’ve had a little bad luck. Normally the cashback bonus is credited to the players account as bonus money, however, some casinos reward the players with real cash instead. No matter if you receive bonus money or real cash, either way you will have extra free cash to play with, which is never a bad thing.