Saving Money - you will be able to save a substantial amount of money in a short period of time since all your earnings will be a disposable income - expenses are taken care of by the cruise line (food, accommodation, medical care, airline ticket to the port of embarkation and back home). Citizens of certain countries do not have to pay taxes on the income they have earned on ships. It will be your responsibility to ensure that you are in compliance with the tax laws applying to your country of residence.