Credit card comparision shopping can save you money on interest and fees. Comparing APR (Annual Percentage Rates), among the other features of a credit card, can make a significant difference if you do not expect to always pay your monthly bill in full.
The annual percentage rate, the "APR", is the way of stating the interest rate you will pay if you carry over a balance, take out a cash advance, or transfer a balance from another card. The APR states the interest rate as a yearly rate.
A single credit card may have several APRs:
One APR for purchases, another for cash advances, and yet another for balance transfers. The APRs for cash advances and balance transfers often are higher than the APR for purchases (for example, 14% for purchases, 18% for cash advances, and 19% for balance transfers).
Tiered APRs. Different rates are applied to different levels of the outstanding balance (for example, 16% on balances of $1–$500 and 17% on balances above $500).
A penalty APR. The APR may increase if you are late in making payments. For example, your card agreement may say, "If your payment arrives more than ten days late two times within a six-month period, the penalty rate will apply."
An introductory APR. A different rate will apply after the introductory rate expires.
A delayed APR. A different rate will apply in the future. For example, a card may advertise that there is "no interest until next March." Look for the APR that will be in effect after March.
If you carry over a part of your balance from month to month, even a small difference in the APR can make a big difference in how much you will pay over a year.
Fixed vs. variable APR
Some credit cards are "fixed rate".
The APR doesn’t change, or at least doesn’t change often. Even the APR on a “fixed rate” credit card can change over time. However, the credit card company must tell you before increasing the fixed APR.
Other credit cards are "variable rate".
The APR changes from time to time. The rate is usually tied to another interest rate, such as the prime rate or the Treasury bill rate. If the other rate changes, the rate on your card may change, too. Look for information on the credit card application and in the credit card agreement to see how often your card’s APR may change (the agreement is like a contract -it lists the terms and conditions for using your credit card).
Find out how long it would take to pay off a credit card or other loan with the Loan Calculator