An Annual Percentage Rate (APR) is a standard rate used to show the cost of borrowing over a 12-month period and includes the amount of interest charged plus the costs of any fees.

In simple terms, the APR reflects the interest rate and any additional charges as a percentage of the amount you are borrowing and is there to help you to easily compare different credit products.  

Details of your APR are set out in the Credit Agreement contained in your welcome letter and you can find an example calculation within the pre-contract credit information.