How does credit card interest work?

All credit card companies charge daily interest on the unpaid debt balance that is carried from month-to-month. A credit card interest rate may also be looked at as an Annual Percentage Rate (APR). If you pay off your balance in full each month you will not be charged interest. Maintaining a balance will always result in interest being owed as part of the next monthly payment. This means that when you make a purchase and don’t pay your next bill in full, you are actually paying more for your purchases.