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What does APR mean I'm paying?
Banks have to disclose up front the Annual Percentage Rate or interest rate that will be charged if you have an outstanding balance on a credit card. However, the APR of 19.9% is not charged all at once. For example if you had a $100 dollar balance on your credit card you would not be charged 19.9% interest or 19.90 making your new balance 119.90. Instead you would be charged the periodic rate which is one month's interest. You can easily calculate the period rate by dividing the APR by 12. So, 19.9% equals 1.65833% per month. This means if you had a $100 balance you would be charged 1.65833% interest or 1.66 making your new balance 101.66. Ask the bank or look on the website for a document called "Cardholders Agreement". If you can't find a link ask them for a copy so you can read all the fine print ahead of time.