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Refinance Calculator Auto Loan

Compare your current car loan with a refinance offer — new payment, monthly savings, interest, fee break-even, and total cost — in the browser.

  • Payment vs current
  • Fee break-even
  • Stays on your device
Current loan
Remaining term (years + months, or months only)
Use 0 years and a month count if you only know remaining months.
Refinance offer

Numbers stay on this device. Nothing is uploaded, and there is no account.

A refinance calculator auto loan answers a practical question: if you replace the current car loan with a new rate and term, does the monthly payment fall enough to justify the fees? Enter the balance you still owe, the rate you pay now, and how much term is left — years plus months, or months only.

Then add the refinance rate and new term. Optional closing costs show break-even months: how long the monthly savings take to cover those fees. An optional extra monthly payment is added on top of the new scheduled payment so you can see a faster payoff and lower interest. People also search this as an auto refinance calculator or a car loan refinance calculator — the comparison is the same.

A lower payment is not the whole story. Stretching the term can raise total interest even when the monthly bill shrinks. The results panel shows current vs new interest and a total cost comparison that includes fees paid at closing. Everything runs in your browser. Totals never leave the device, and there is no account.

Browse more calculators on the Finance hub, or open the mortgage recast calculator, emergency fund calculator, stock average calculator, and paycheck calculator hourly. For campaign URLs, use the UTM builder. Need a photo converted locally? Try the HEIC to PNG converter.

How to use the refinance calculator auto loan

  1. Enter the current loan balance (remaining principal, not the original amount).
  2. Enter the current annual interest rate and remaining term in years and months.
  3. Enter the new refinance rate and the new term in months.
  4. Optionally add fees or closing costs, and an extra monthly payment.
  5. Read the new payment, monthly savings, interest, break-even, and total cost.

Frequently asked questions

How does a refinance calculator auto loan work?

A refinance calculator auto loan re-amortizes your current balance at the new rate and term, then compares that offer with the loan you have now. You see the current monthly payment, the new payment, monthly savings, total interest on both paths, and total cost after optional fees.

What numbers do I need for this refinance calculator auto loan?

Enter the current loan balance, current interest rate, remaining term (years plus months, or months only), the new refinance rate, and the new term in months. Fees and an extra monthly payment are optional. An auto refinance calculator or car loan refinance calculator uses the same inputs.

How do you calculate break-even months on refinance fees?

Break-even months is fees divided by monthly savings (current payment minus the new scheduled payment). If fees are $399 and you save $21.44 a month, break-even is about 18.6 months. If the new payment is not lower, fees never break even.

Does a lower rate always save money on an auto refinance?

Not always. A lower rate with a much longer term can raise total interest even when the monthly payment drops. Compare total interest and total cost — including fees — not just the new payment.

How does an extra monthly payment change the refinance comparison?

Extra principal is added on top of the new scheduled payment. That shortens months to pay off and cuts interest on the new loan. Monthly savings still compares the scheduled payments so you can see the refinance itself, separate from extra principal.

Does this refinance calculator auto loan upload my loan numbers?

No. Balance, rates, remaining term, fees, and extra payments are calculated in your browser. Nothing is sent to a server or stored on our side.

What is the difference between refinancing and recasting a loan?

Refinancing replaces the loan with a new rate, term, and usually fees. A recast keeps the same loan and rate, then lowers the payment after a lump-sum principal payment. This page models an auto refinance only.

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