Balance Transfer (BT) is one more common feature of todays credit card business. If utilised with wisdom this could be an interest free loan for you (for those who use two or more credit cards. You could keep transferring your balances periodically (every 2-3 months depending on the bank) from one card to another while paying 5 % of the dues without any interest. Banks may (as usual) have a lot of hidden conditions which needs to be looked into before making use.