0 balance transfer credit cards are ones that charge zero interest for an initial period on balance transfers. Some cards charge no interest on purchases and some zero on both, but one has to be careful to be sure which area the 0% applies to when choosing a card. Cash advances can sometimes have a different set of rules including higher interest, interest owed from the date of the transaction rather from the date of billing, and cash advance balances being paid of only after all other balances have been cleared. So as you can see it is vital to understand the particular details of any card.

