This is used to compare interest rates for borrowing. It is the total (or “gross”) interest you’ll pay over the life of a loan, including charges and fees. For credit cards where interest is charged at more frequent intervals, the APR includes a “compounding” effect (paying interest on interest). So for a credit card charging 2% interest a month (equating to 24% a year), the APR would actually be 26.82%.
Used by the holder to buy goods and services, credit cards also have a monthly or annual spending limit, which may be raised or lowered depending on the creditworthiness of the cardholder. But unlike charge cards, borrowers aren’t forced to pay the balance off in full every month and, as long as they make a stated minimum payment, can carry a balance from one month to the next, generating compound interest. As the issuing company is effectively giving you a short-term loan, most credit cards have variable and relatively high interest rates. Allowing the interest to compound for too long may result in dire financial straits.