See how extra payments can accelerate your repayment and save you money
| Plan | Monthly Payment | Term | Total Interest | Total Paid |
|---|---|---|---|---|
| Standard (10 yr) | $350 | 120 months | $9,200 | $44,200 |
| Extended (25 yr) | $210 | 300 months | $28,000 | $63,000 |
| Graduated | $175 - $525 | 120 months | $11,550 | $46,550 |
| Income-Based | $230 | 144 months | $8,120 | $43,120 |
Note: Income-Based repayment calculated at 10% of discretionary income for a $40,000/year income.
Adding extra payments to your monthly student loan payment can significantly reduce both the term of your loan and the total interest paid.
Standard Repayment: Fixed monthly payments for up to 10 years. This is the default plan and typically results in the lowest total interest paid.
Extended Repayment: Fixed or graduated payments for up to 25 years. Available for borrowers with more than $30,000 in federal loans. Monthly payments are lower but total interest is higher.
Graduated Repayment: Payments start low and increase every two years. Designed to accommodate borrowers who expect their income to increase over time. Total repayment period is 10 years.
Income-Based Repayment (IBR): Monthly payments are based on your income and family size, typically set at 10-15% of discretionary income. Available for borrowers experiencing financial hardship. Any remaining balance after 20-25 years may be forgiven.
Pay As You Earn (PAYE): Monthly payments are 10% of discretionary income, with any remaining balance forgiven after 20 years of qualifying payments. Requires partial financial hardship to qualify.
Revised Pay As You Earn (REPAYE): Monthly payments are 10% of discretionary income with no requirement for financial hardship. Unsubsidized interest is subsidized for the first three years. Any remaining balance is forgiven after 20 years (undergraduate) or 25 years (graduate).
Making extra payments toward your student loans can help you save thousands in interest and pay off your loans years earlier, regardless of which repayment plan you choose.
This tool shows how a student loan is paid off through standard amortization and how adding extra to your payment shortens the timeline and cuts total interest. Amortization is the schedule by which a fixed monthly payment gradually clears both interest and principal. Seeing where your money goes each month makes the payoff concrete and shows why paying above the minimum is so powerful.
With standard amortization, you make a fixed monthly payment that covers the interest accrued that month plus a portion of principal. Early on, more of each payment goes to interest and less to principal; as the balance falls, that ratio flips. Any extra payment you make goes straight to principal, which shrinks the balance faster than scheduled. Because interest is charged on the remaining balance, a smaller balance means less interest going forward, so paying more than the minimum cuts both the total interest and the number of months to payoff.
Suppose you owe $30,000 at an assumed fixed rate over a 10 year term, giving some fixed monthly payment. In the first month, part of that payment covers the interest on the full $30,000 and the rest reduces principal. If you add an extra $100 every month, that entire $100 attacks principal directly. Over time this reduces the balance ahead of schedule, so less interest accrues in every later month. The loan clears well before the 10 year mark, and the total interest paid drops noticeably compared with paying only the scheduled amount.
Enter your current loan balance, the interest rate, and the remaining term in years or months. Then enter any extra monthly amount you plan to add. The calculator builds the amortization schedule, shows your scheduled payoff date and total interest, and shows the shorter payoff date and interest saved when your extra payment is applied.
This models a single fixed-rate loan with a steady payment and does not capture variable rates, deferment, forbearance, or income-driven repayment plans, which change how interest and balances behave. Federal loans may offer forgiveness or subsidy features not reflected here. Some servicers apply extra payments in ways you must specify to ensure they hit principal. Confirm with your servicer before assuming an extra payment reduces principal as modeled.
Why does so much early payment go to interest? Interest is charged on the outstanding balance, which is largest at the start. As you pay the balance down, the interest portion of each payment shrinks.
How do extra payments help? Extra amounts reduce principal immediately, so less interest accrues every month afterward. That compounds into meaningful savings and an earlier payoff.
Should I tell my servicer where to apply extra money? Yes. Some servicers apply extra payments to future scheduled payments instead of principal, so specify that the extra should go toward principal.
Does this work for federal and private loans? The amortization math applies to both, but federal programs like income-driven repayment and forgiveness follow different rules this simple tool does not model.
Disclaimer: This calculator provides educational estimates using standard formulas, not personalized financial advice. Lending terms, interest rates, and your individual circumstances vary. Consult a licensed mortgage, financial, or tax professional before making decisions.
Sources: USAGov. Get started repaying your federal student loan