While the best rewards credit cards can help you rack up cash back, points or miles on purchases, they usually come with high interest rates. Your best course of action is to pay your balances in full every month; then, you have nothing to worry about.
However, financial conditions can change, prompting you to carry a balance each month. That's why this one factor, APR, matters a lot. APR stands for annual percentage rate, also known as the annual cost of borrowing money.
