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Debt•Standard & Extra Principal Repayment

Student Loan Payoff Calculator

Model your standard monthly student loan payments and discover how extra principal contributions cut total interest costs and shave years off your loan term.

Looking for Federal Forgiveness (PSLF or RAP)?

This tool calculates standard & accelerated principal repayment for private or fixed-term loans. If you hold federal Direct Loans and work in public service or qualify for income-driven plans, compare your forgiveness options:

Forgiveness CalculatorPSLF vs. RAP Guide

Loan Details & Extra Payment

$
%
Years
$/mo
New Payoff Time6 Yrs 8 MoShaves 3 Yrs 4 Mo off term
Total Interest Saved$5,124Direct savings
Total Monthly Payment$547 / mo$397 base + $150 extra

Schedule Comparison: Standard vs. Accelerated

Standard Payoff
Monthly Payment:$397
Total Interest:$12,689
Total Paid:$47,689
With Extra Payment
New Monthly Payment:$547
Total Interest:$7,565
Total Paid:$42,565

Payoff Trajectory Comparison

StandardAccelerated

Frequently Asked Questions

Clear rules for standard payoff vs. federal loan forgiveness programs.

Is this calculator for federal loan forgiveness or standard payoff?

This calculator measures standard principal and interest repayment for private student loans or fixed-term federal loans. If you have federal Direct Loans and qualify for Public Service Loan Forgiveness (PSLF) or income-driven plans (RAP), use our specialized Student Loan Forgiveness Calculator instead.

How do extra monthly principal payments reduce student loan interest?

Student loan interest accrues daily on your principal balance. When you pay extra money directly toward principal, subsequent daily interest is calculated on a smaller balance. This shortens your loan term and reduces total lifetime interest charges.

Do student loans carry prepayment penalties?

Under federal law, all federal student loans and private student loans carry zero prepayment penalties. You can make extra monthly payments, pay lump sums, or clear your balance in full at any time without fees.

Should I pay off high-interest student loans before investing?

If your student loan interest rate exceeds 6% to 7%, making extra payments delivers a guaranteed, tax-free return equal to your interest rate. For low-rate loans (under 4%), long-term investing in broad market index funds may yield higher net returns after accounting for taxes.