You didn't mention in your OP how much of a balance you are carrying now. All credit cards that I am aware of will charge a balance transfer fee in order to move a balance to another card. Some banks will not let you transfer a balance to another one of their cards. Also, you may have a 0% introductory purchase interest rate on your card, but there is a very good chance that it will not apply to a balance transfer. These are all questions that you need to ask Cap One. As far as moving a credit line (different from a balance),some cards will allow it and some will not. Some will only allow when you are opening a new card. Unfortunately, there is not much advice we can offer without knowing the whole situation. You will prob need to contact Cap One directly to answer most of your questions.