One thing for sure is that when registering at an online casino for the first time you will be eligible for a sign up casino bonus but sorting out which of the online casinos offers the best casino bonus can be more difficult. A lot depends on whether you intend to be a regular player or whether you have a onetime windfall that you fancy gambling; some online casinos offer a casino bonus that has a match for your first three deposits whereas others are only once. The headline for the casino bonus is also not necessarily a clue to which is a better bonus as all casino bonuses have what is called a “play through” requirement which is in place to prevent new players from making a deposit, getting the bonus and then walking off with the money. The online casino reasonably enough wants to make sure that the cash given in the form of a casino bonus is used to play the casino games and they will therefore specify the number of times that the bonus must be staked before any winnings can be withdrawn. One point to watch for in casino bonus terms and conditions is what the play through requirement is and whether it applies just to the bonus or to the deposit and the bonus. If for example the casino bonus is a 100% match of your first deposit then a play through requirement of 40 times the bonus is the same as 20 times the bonus plus your deposit; some online casinos specify it one way and others the other way so pay attention. Another important issue to consider is which casino games qualify for the pay through for the casino bonus and which do not. Because roulette or blackjack are considered low risk casino games they will either not count at all towards a play through or they may count for a low percentage such as 10%. There is nothing wrong with a casino bonus and it can never cost you money but to avoid misunderstanding and possible disappointment make sure that you read the terms and conditions of a casino bonus..