Should I Pay Extra or Refinance Student Loans?
This calculator compares two paths to faster student loan payoff: adding extra money to each monthly payment or refinancing to a lower interest rate. Enter your balance, current rate, a refinance offer, and the extra amount you can afford. The right choice depends on the rate gap, your loan type, and how much flexibility you need.
Interest you never pay
Debt-free earlier — instead of .
- Same loan, two habitsAs you areWith extra
- Monthly payment
- Debt-free in
- Interest paid
- Total paid
That is a year of extra payments cutting off the interest bill.
At this payment the balance never clears — the payment is smaller than the interest accruing each month.
Tell your servicer in writing to apply extra money to the principal of your highest-rate loan, otherwise it is often treated as paying next month's bill early. Interest accrues daily at a day on the balance you entered.
Extra Payments: Flexibility Without Commitment
Extra payments let you accelerate payoff without changing anything about your loan contract. You keep your current rate, your current servicer, and, if your loans are federal, every federal protection: income-driven repayment under RAP or IBR, PSLF eligibility, forbearance, and disability discharge. You can increase, decrease, or stop the extra amount at any time with no penalty.
The trade-off is that extra payments do not reduce your interest rate. They shorten the term and cut total interest by reducing the principal on which daily interest accrues, but each dollar still accumulates interest at the original rate until it is repaid. On a $45,000 balance at an illustrative 6.5%, an extra $200 per month shaves years off the loan and saves thousands, yet the per-dollar cost of carrying that debt remains unchanged. The calculator shows exactly how many months you cut and how much interest you avoid for the extra amount you enter.
Refinancing: Lower Rate, Permanent Trade-Off
Refinancing attacks the rate itself. A lower rate means every remaining dollar of principal costs less to carry, which reduces total interest even without extra payments. If the rate drop is large enough, the savings exceed what extra payments alone could achieve on the old rate.
But refinancing is a commitment, and if your loans are federal, it is irreversible. You permanently lose income-driven repayment, PSLF, forbearance, and disability discharge. You also lock in a new term length: choosing a shorter term amplifies savings but raises the required monthly payment, while a longer term can erase the benefit entirely. The calculator places both strategies side by side: total interest saved by extra payments alone versus total interest saved by refinancing at the rate you enter. If the numbers are close, extra payments are usually the safer choice because they preserve your optionality. If the rate gap is wide, refinancing pulls ahead. Try the refinance savings calculator to isolate the rate-driven component.
Rate and payment examples are illustrative. Extra payments should be applied to principal; confirm application method with your servicer.
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Related student loan calculators
- Student Loan Payoff Calculator With Extra Payments
- Is Student Loan Refinancing Worth It? 2026 Calculator
Sources
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Sources: standard amortization math; r/StudentLoans extra-payment vs refinancing discussions (2024-2026); ed.gov federal loan protections.
- Federal Direct Consolidation Loan interest rate — the weighted average of the loans being consolidated, rounded up to the nearest one-eighth of one percent (Federal Student Aid, studentaid.gov, Loan Consolidation).
- Amortisation, daily interest accrual and payoff arithmetic — standard loan mathematics; every figure on this page is computed from the numbers you enter.