A hamsters life-span can variey depending on it's surrondings, the breed and whether it is with other hamsters although normally a hamster would live for 4-5 years sometimes if loved correctly hamsters can live to 7 or 8 years. All you'll really need to do is clean out his cage occasionaly, feed him, play with him and love him and there you go you have a happy companion for about 7 years!