The amount you pay monthly on student loans largely depends on the total loan balance, interest rate, and repayment plan. If your discretionary income is low enough under an income-driven repayment plan, it’s possible that your monthly payment could be as low as $50 or even zero. Note that this could lengthen the repayment period and the total amount repaid over the life of the loan, which can impact the amount of student loan interest you pay over time and your overall financial health.