Jenny charged $2,500 to her credit card during her first month with an APR of 19.8%. By only making minimum payments of $50 per month, it will take her 8 years and 9 months to pay off the balance, costing her $2,825.18 in interest charges over the life of the loan. Credit cards can be convenient but also carry risks like high interest fees if not paid off in full each month. Both positive and negative credit card use impacts an individual's credit history and credit score over time.