Not making payments on your student credit card will cause your debt to increase very quickly. Interest will be charged on the balance and you may also be charged a late payment fee of around $10 to $30. If you continue to carry a balance on the card, you will be charged interest on the entire balance (including the late payment fee and interest charges). It could also negatively affect your credit report. Always aim to pay at least the minimum off your card by the due date on your statement and contact your issuer to discuss your circumstances if you're struggling to meet these payments.