As an example: If you have made two purchases, $1, 000.00 each at the begining of the billing date, for a total balance of $2, 000.00 at the end of the billing date and you pay $2, 000.00 against the balance on the due date, then there is no "purchase interest" charged. On the other hand, if you only pay $1, 000.00 against the balance of $2, 000.00 leaving a balance of $1, 000.00 then RBC Visa charges you the monthly "purchase interest" on the $2, 000.00 - or - 19.5% divided by 12 = 1.625% monthly interest in the case of $2... read full review »