What is the concept of a balance transfer credit card? To put it simply, making 0% interest balance transfers from one credit card to another is a great way of answering the age-old conundrum: how to have your cake and eat it too. You have nothing to lose — but to gain you have a bundle of money that could have disappeared while you paid high interests on purchases and loans you’ve made on your current credit card(s). Sounds like an interesting proposition? It most certainly is! Balance transfer credit cards are there to save you in the hour of need. And then there are the best balance transfer cards. We call them best for a reason; flat zero percent interest rate being one of them.