Student Loan Payoff Calculator

It depends on your balance, rate, and extra amount. On a $35,000 loan at 5.5% over 10 years, an extra $100/month saves roughly $2,500 in interest and pays off the loan about 30 months early. Use the comparison table to see exact savings at different amounts.

Compare your loan's interest rate to expected investment returns. If your loan rate is higher than your expected after-tax investment return, extra payments provide a better guaranteed return. If lower, investing may be mathematically better — but paying off debt has psychological benefits too.

Extra payments go entirely toward principal reduction (assuming you are current on your regular payment). This reduces the balance that accrues interest each month, creating a compounding savings effect.

Yes. Federal student loans have no prepayment penalties. Contact your servicer to ensure extra payments are applied to principal rather than advancing your due date. Some servicers default to advancing the due date, which does not reduce interest.

Even $25–$50 per month makes a meaningful difference over a 10-year loan. The savings compound over time, so starting small and early is better than waiting until you can afford a large extra payment.

It calculates your payoff timeline and total interest at extra payments of $0, $50, $100, $200, $300, and $500 per month using your loan balance and rate. The row matching your entered extra payment is highlighted.

Federal student loans never have prepayment penalties. Most private student loans also allow prepayment without penalty, but check your loan agreement to confirm.

The avalanche method (highest rate first) saves the most in total interest. The snowball method (smallest balance first) provides faster psychological wins. Both work — choose the approach that keeps you motivated.

Once the balance reaches zero, you owe nothing further. The months between your early payoff date and the original end date represent months of payments you no longer need to make — that money is freed up for other goals.

Yes, in practice you can change your extra payment at any time. This calculator models a fixed extra payment for simplicity. Recalculate periodically with your updated balance and new extra payment amount to track progress.

Autopay usually lowers the rate by only 0.25%, so by itself it rarely transforms the payoff timeline. But it still reduces interest, helps prevent missed payments, and becomes more useful when you keep the same monthly outflow and add extra principal payments on top.

If the total dollars are the same, an early lump sum usually saves more interest because it reduces principal immediately. Monthly extra payments can still be the better real-world plan if they are easier to sustain without draining emergency savings.

Not automatically. If you may qualify for an income-driven repayment plan or a forgiveness program such as PSLF, large extra payments can reduce your flexibility or pay down balances that might otherwise be forgiven. Compare both paths before accelerating federal loans.

Often yes, but it depends on your servicer and the payment instructions you provide. If you have multiple loans, ask how to direct extra money to a specific loan so your avalanche or snowball plan works the way you intend.

Use the target payoff term field. The calculator applies your one-time payment and autopay setting first, then estimates the monthly payment needed to clear the remaining balance within that target term. The capacity check shows whether that payment is under or over your monthly budget.