The interest rate directly affects how much your student loan costs beyond the amount you originally borrowed. A higher rate generally means more interest accumulates over the repayment period, increasing the total amount you eventually repay.

The repayment term matters too. Even with the same interest rate, extending repayment over a longer period can increase the total interest paid because the balance remains outstanding for longer. Conversely, a shorter repayment period may result in higher monthly payments but less interest overall.

Interest can also accumulate differently depending on the type of student loan and whether you make payments while you’re in school or during other periods when payments aren’t required.

Before borrowing, don’t look only at the amount you’ll receive. Estimate the future payment and total repayment cost under different interest rates and terms. A student loan calculator can help you see how these variables affect your potential borrowing cost before you commit.