Student Loan Payoff Calculator

Calculate payoff date and total interest from balance, rate, and monthly payment.
$
%
I Want to Set

Monthly Payment

$773.31

Payoff Time

5.0 years

Total Interest

$6,398.72

Payment Comparison

$300.00/mo221 months | $26,300.00 interest
$500.00/mo103 months | $11,500.00 interest
$750.00/mo63 months | $7,250.00 interest
$1,000.00/mo45 months | $5,000.00 interest

Use the Student Loan Payoff Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only and does not constitute tax, financial, or legal advice. Results are estimates based on the information you provide and current rates. Always consult a qualified tax professional or financial advisor for advice specific to your situation.

How It Works

This Student Loan Payoff Calculator helps you understand exactly when you'll be debt-free and how much interest you'll pay over the life of your loan. Knowing your payoff date and total interest is crucial for financial planning, especially as interest rates for federal student loans disbursed after July 1, 2026, are projected to be around 6.53% for undergraduate Direct Loans and 8.08% for graduate Direct Loans. This tool empowers you to make informed decisions about increasing payments or exploring refinancing options to save money.

Our calculator uses the standard amortization formula to determine your payoff period and total interest paid. The core of the calculation involves iteratively reducing the principal balance by applying a portion of your monthly payment after calculating the interest accrued for that period. The formula used is P = A / (1 - (1 + r)^-n) / r, where P is the principal, A is the monthly payment, r is the monthly interest rate, and n is the number of payments.

A common mistake is underestimating the impact of even small extra payments; they can significantly reduce your interest and payoff time. Be aware that this calculator assumes a fixed interest rate and consistent monthly payments; variable rates or missed payments will alter your actual payoff. Also, remember that federal student loan interest rates are typically set annually and can fluctuate, so regularly re-evaluating your payoff plan is a good practice.

Example: Accelerating a $30,000 Student Loan

  1. 1 Imagine you have a student loan with a principal balance of $30,000, an interest rate of 6.53% (a projected undergraduate rate for 2026), and a standard monthly payment of $340.
  2. 2 Using the calculator, we input the balance, rate, and monthly payment. The calculator then computes the number of payments required and the total interest. If you decide to increase your payment to $400, the calculator recalculates these values.
  3. 3 With a $340 monthly payment, your loan would be paid off in approximately 117 months (9 years and 9 months), and you would pay a total of $9,780 in interest. By increasing your payment to $400, your payoff date would accelerate to approximately 93 months (7 years and 9 months), and your total interest paid would drop to $7,200.
  4. 4 This example demonstrates that an extra $60 per month can save you two years of payments and nearly $2,580 in interest. This significant savings highlights the power of making even modest additional payments towards your student loan principal.

Source: FSA · Last updated: April 2026

Frequently Asked Questions

How long will it take to pay off my student loans?
The standard federal repayment plan is 10 years (120 payments). If you owe more, extended plans stretch to 25 years. Paying extra accelerates payoff significantly. Adding $100/month extra to a $30,000 loan at 5.5% cuts payoff from 10 to about 7 years.
Should I pay off student loans or invest?
Compare your loan interest rate to expected investment returns. If your rate is above 6-7%, prioritize payoff. Below 4%, investing likely earns more. Between 4-6%, consider a split approach. Always contribute enough to get any employer 401(k) match first.
What is the fastest way to pay off student loans?
Use the avalanche method: pay minimums on all loans and put extra money toward the highest-rate loan first. Refinancing to a lower rate reduces total interest. Income boosts, tax refunds, and bonuses applied as lump-sum payments have the biggest impact.

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