Many credit cards come with special introductory rates. These often include low or 0% interest rates for the first months or year. But what happens after the introductory period? This is when most credit cards switch to a variable or fixed interest rate. Read on to learn the difference between variable and fixed rate credit cards.
Variable Rate Credit Cards
Variable interest rates are usually tied to another rate. Many credit card companies use the Prime lending rate as an index. This is the rate at which top banks in the United States can borrow money from the Federal Reserve. Creditors also may calculate variable interest rates based on the Treasury bill.
The credit card lender adds a number of percentage points, known as the margin, to the index rate. This new rate is then passed on to your credit card. In certain cases, the credit card company may first multiply the index rate by another number, called the multiple. The new figure is added to the margin to determine the credit card interest rate.
As the index rate fluctuates, it affects the rate on your credit card. The APR (annual percentage rate) on variable rate credit cards may change at any...