Credit card companies determine their APRs based on creditworthiness – or how much risk you pose as a borrower­ – as well as broader factors, like the health of the economy. Creditworthiness is based on criteria such as an applicant's credit history, income, and the total debt owed. Other considerations include age, monthly housing payments, and employment status.
So, if a credit card company advertises a card's APR as a range – 15% to...