Student Loan Payments Explained: Interest, Terms and Paying Off Early

For a standard fixed-rate loan, the monthly payment depends on three things: the balance, the interest rate and the number of months. The formula spreads the loan into equal payments so that the balance reaches zero at the end. On $30,000 at 5.5%, a 10-year term gives a payment of $325.58.

Each month, interest is charged on the remaining balance. In month one that is $30,000 × 0.055 ÷ 12 = $137.50, so of your $325.58 only $188.08 reduces the balance. Over time the balance shrinks, so more of each payment goes to principal.

A longer term makes each payment easier but costs far more overall.

Paying an extra $100 a month on the 10-year loan finishes it in 86 months instead of 120, saves about $2,753 in interest and finishes 34 months early. Ask your servicer to apply extra money to the principal, and if you have several loans, target the highest interest rate first (the “avalanche” method). Some people prefer to clear the smallest balance first for momentum (the “snowball” method).

• Is my rate fixed or variable?
• How are extra payments applied?
• Does unpaid interest capitalise, and when?
• What repayment or forgiveness options exist for my type of loan?

For federal loans, the U.S. Department of Education’s studentaid.gov explains current repayment options.

Make the payment a fixed part of your budget. In the family budget calculator, minimum debt payments count as a need, and extra payments belong in savings and debt repayment.

This is a simple fixed-rate model. Income-driven plans, deferment, forbearance and forgiveness programs have their own rules that change over time. Check with your servicer for your situation. This page is educational and is not financial advice.