Do you receive one credit card charge for your onboard account total at end of cruise (like hotels do it) or are charges submitted to your credit card one by one?
It is one bill at the end of the cruise. There may be a second charge if you purchase anything after the cutoff time. (I’m not exactly sure when that it)
I think if you reach a certain amount they will run the card for that, then again at the end if there are additional charges. The amount varies based on the length of cruise.