PaymentMath

Mortgage & money

Student loan refinance calculator

Quick answer: Refinancing $40,000 from 7.5% to 5.5% over 10 years lowers the payment from $475 to $434 and saves $4,884 in interest.

  • Standard finance formulas · rates you enter
  • Updated
  • Reviewed by Alex · How we calculate

Refinancing $40,000 from 7.5% to 5.5% over 10 years lowers the payment from $475 to $434 and saves $4,884 in interest.

Where do these numbers come from?

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Federal loans: what you give up

Refinancing federal student loans with a private lender ends access to income-driven repayment, Public Service Loan Forgiveness, federal deferment and forbearance, and any future federal relief. Weigh the interest saved against that safety net. Private loans have none of these protections, so refinancing them carries less trade-off.

Savings on $40,000 (10-year terms)

Current rateNew rateMonthly savingsTotal savings
6.5%5%$30$3,592
7.5%5.5%$41$4,884
8%6%$41$4,947
9%6.5%$53$6,301
12%8%$89$10,629

Example rates are for comparison only, not offers or current quotes. Your rate depends on credit, loan-to-value and lender.

Sources and assumptions

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Frequently asked questions

Should I refinance federal student loans?

Only if the savings outweigh losing federal benefits such as income-driven repayment and forgiveness programs.

Can I refinance student loans more than once?

Yes. Private refinancing can usually be repeated if rates fall.