Prime rate là gì

You may have sầu seen the term Atruyền bá, or annual percentage rate, used in reference khổng lồ everything from mortgages and tự động hóa loans khổng lồ credit cards. In this piece, we look at credit card APRs—which you’ve probably seen listed on your monthly statements. Knowing what an Aquảng cáo is, how it’s calculated and how it’s applied can help you make more informed credit card decisions.

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Aquảng cáo is an annualized representation of your interest rate. When deciding between credit cards, Aquảng cáo can help you compare how expensive sầu a transaction will be on each one. It’s helpful to lớn consider two main things about how APR works: how it’s applied và how it’s calculated.


Generally, credit card companies offer a grace period for new purchases. If you only make purchases và pay off your ending balance each month by the due date, you pay just the amount you owe with no interest. However, if you opt to carry a balance on your thẻ, you pay the agreed-upon interest on your outstanding balance.


Many variable interest rates start by using an index, such as the U.S. Prime Rate, & then add a margin. The result is the Atruyền bá. Variable rates can change if the index changes, and some banks offer a non-variable Atruyền bá as well. Here’s an example of how the rate is set:


The U.S. Prime Rate, as published in the Wall Street Journal

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The margin the bank charges

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Annual percentage rate

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Banks use a formula to determine how much interest you pay on your outstanding balance. They calculate it using a daily or monthly periodic rate, depending on the thẻ.

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Keep in mind some accounts have sầu multiple APRs, so this calculation may be applied for each one. The statement gives you more information about how khổng lồ calculate the balance subject lớn interest rate.

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Annual percentage rate

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Days in a year

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There are different APRs based on how you use your credit thẻ. When you’re selecting a credit card, it’s a good idea lớn consider these rates in addition to lớn your credit needs.