If you are new to online casinos there is always a bonus waiting for you no matter which online casino you choose but there are a few things to be aware of before settling your choice. An online casino bonus is usually expressed as a percentage of your first deposit and it is generally 100% up to a maximum amount and sometimes, as is the case with Paddy Power casino at the moment, there are also casino bonuses available for second and third deposits as well but these are generally for smaller maximum amounts and for a lesser percentage such as 50%. Some online casinos such as Ladbrokes for example have a high limit for the first deposit, currently €500 but unless you are one of the few who will make a first deposit of that size it is quite meaningless. There are few Irish casino players who will make a first deposit of that size even though they may do later which is reasonable enough as most will want to try the online casino first. The real critical factor however is what you need to do to turn any bonus into redeemable cash and this is usually expressed as a play through requirement which in effect means the number of time that the bonus must be staked before the casino bonus becomes part of your cash account and here there can be large differences. All Irish Casino seems to have the best bonus at the moment as although it is capped at €50 on the first deposit, you only need to stake the bonus amount 20 times for it to arrive in your cash account. Compare that to Paddy Power who advertise three bonuses but the play through requirement is 32 times your bonus plus your stake which is the same as 64 times your bonus so do not simply look for the size of the casino bonus, look also how hard or easy it might be to achieve.