Credit cards can be great and they can be evil, it all depends on how you use it. If you think of it as a debit card you would probably do fine using one. However, if you plan on carrying any sort of balance you are going to be screwed through interest and payments that never end. The only way I would say to get a credit card at 18 is if you can do the former and you are the one making the payments. My kids aren't going to be mooching off me to have me pay off their high-end credit. As long as I tell them the downfalls of messing up their credit that mistake belongs to them. (yeah, it sounds mean, but if I tell them enough times I won't pay for it, maybe they won't do it.)