When you’re ready to make a purchase at a retailer, you normally have three options for payment– cash, debit or credit. If you’re using a card, then most likely you’re using either a debit card or credit card. There are different costs associated with using each. When using a credit card, you don’t have to worry about paying your purchases until later. This is a wonderful cushion when an unexpected expense pops up. It allows you to pay it back over time until the balance is completely covered again. There is a drawback. If you don’t pay your balance back in full, you will usually have to pay a fee. For instance, you have to pay interest which can rack up an average of 15%. Also, if you go over your credit limit, you could be stuck with an additional fee ranging anywhere from $25 to $35. There is also an annual fee with many credit cards.