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Student Loan Calculator

Your monthly payment, total interest, and what an extra payment each month actually buys you.

Your loan

The standard federal plan is 10 years. Income-driven plans work differently — this models fixed amortized payments.

Monthly payment
$489
Total interest
$8,441
Paid off in
7y 5m
That $100/mo extra saves $3,188 in interest and clears the loan 2y 7m sooner.

Balance over time

How this works

Student loans amortize like any installment loan: a fixed payment where the interest share shrinks as the balance falls. Extra payments go to principal and shorten the tail end of the loan. Federal loans have no prepayment penalty, and neither do private loans by law. One wrinkle worth knowing: if you're pursuing federal forgiveness programs like PSLF, paying extra can work against you — those programs reward minimum qualifying payments, not fast payoff.

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