Student Loan Payoff Calculator
Calculate your monthly student loan payment, total interest, and payoff date — with comparison of standard, extended, and income-driven repayment plans.
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How to use this calculator
- 1
Enter your outstanding loan balance and interest rate — Federal Direct Unsubsidized loans for undergrads have a 6.54% rate in 2024-25.
- 2
Choose your repayment plan — Standard (10 years) costs the least in interest; Extended (25 years) has lower monthly payments.
- 3
Add an extra monthly payment to see how much faster you can pay off the loan and the total interest saved.
- 4
Income-driven plans (SAVE, PAYE, IBR) are not included — payment amounts vary by income and family size.
Frequently asked questions
What are the current federal student loan interest rates?
For 2024-25: Direct Subsidized/Unsubsidized (undergraduate): 6.53%. Direct Unsubsidized (graduate): 8.08%. Direct PLUS (parents/grad): 9.08%. These rates are set annually by Congress based on the 10-year Treasury note yield plus a fixed add-on.
What is the SAVE plan?
SAVE (Saving on a Valuable Education) is the newest income-driven repayment plan. Payments are 5% of discretionary income for undergraduate loans (10% for grad). Unpaid interest doesn't capitalize. After 10–25 years, the remaining balance is forgiven (tax-free through 2025). SAVE is paused and in litigation as of 2024 — check studentaid.gov for current status.
Can I deduct student loan interest on my taxes?
Yes — you can deduct up to $2,500 of student loan interest paid annually on federal taxes. This deduction is available even if you don't itemize (it's an above-the-line adjustment). It phases out for single filers with MAGI $75,000–$90,000 and MFJ $155,000–$185,000 in 2024.
Should I pay off student loans or invest?
If your loan rate is under 5%, investing often wins (stock market has historically returned ~7–10% annually). If your rate is above 7%, aggressive payoff is usually better. Between 5–7%, it's roughly equal — factor in job stability, risk tolerance, and tax deductibility. Always capture any employer 401(k) match before making extra loan payments.
Student Loan Payoff Calculator — Interest and time savings
Standard vs income-driven repayment
Standard 10-year repayment has the highest monthly payment but lowest total interest. Extended (25-year) cuts the payment but more than doubles total interest. Income-driven plans (SAVE, IBR, PAYE) base payments on income — ideal if payments would otherwise be unaffordable. But IDR plans can result in 20–25 years of payments before forgiveness, with significant total interest paid.
The power of extra payments
Paying $100 extra monthly on a $35,000 loan at 6.54% cuts the payoff from 10 years to about 7.5 years — saving over $4,500 in interest. Because federal student loans have no prepayment penalty, extra payments go directly to principal. Even $25–50 extra per month meaningfully accelerates payoff and reduces lifetime interest.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →