Which term is the rate used to calculate interest on credit card balances?

• A. Compound Interest
• B. Grace Period
• C. Annual Percentage Rate (APR)
• D. Credit Card Interest

Answer: (C)

APR, or Annual Percentage Rate, is the rate used to determine how much interest you’ll pay on credit card balances. Credit card issuers quote this annual rate, and in practice they convert it to a daily rate (divide by 365) to apply to your daily balances. Interest can accrue each day on whatever balance you carry, and the way those daily amounts add up means carrying a balance can grow over time if you don’t pay in full.

Paying your statement in full by the due date usually avoids interest on new purchases due to the grace period. The grace period isn’t a rate; it’s a window to pay without interest. The term “credit card interest” refers to the charges you incur, not the rate itself, and “compound interest” describes how interest can accumulate on previously earned interest, which is a method of calculation rather than the label for the rate.