Reviewed by Philip Grant · Updated June 2026
Monthly Savings
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Current Monthly Payment
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New Monthly Payment
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Total Interest — Current Loan
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Total Interest — New Loan
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Net Savings (after fees)
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Break-Even Point
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When does refinancing an auto loan make sense?
Refinancing replaces your current auto loan with a new one — ideally at a lower interest rate, a shorter term, or both. The most common reason people refinance is that their credit score has improved since they first got the loan, which makes them eligible for better rates.
Watch for term extension traps
A lower monthly payment sounds good, but if you extend your term significantly (say, from 24 months left to a new 60-month loan), you'll likely pay more total interest even at a lower rate. This calculator shows total interest for both scenarios so you can see the full picture, not just the monthly payment difference.
The break-even point
If refinancing has upfront fees, the break-even point tells you how many months it takes for your monthly savings to cover those fees. If you plan to keep the car longer than that, refinancing comes out ahead financially.
Frequently Asked Questions
When is it worth refinancing my car loan?
It is worth it when you can get a meaningfully lower rate, your credit has improved, or you need a lower payment — and the savings outweigh any fees. The calculator shows your monthly and total-interest savings.
Does refinancing a car loan hurt my credit?
There is a small, temporary dip from the credit inquiry, but it usually recovers quickly. Over time, a lower rate and consistent on-time payments are generally positive for your credit.
Can I refinance a car loan with the same lender?
Sometimes, but you will often get better offers by shopping several lenders. Compare any new offer against your current loan's remaining balance and rate right here.
Will extending the term lower my payment?
Yes, but a longer term usually means more total interest even at a lower rate, and raises the risk of owing more than the car is worth. Compare total cost, not just the monthly payment.
Is there a downside to refinancing my auto loan?
Watch for prepayment penalties on your current loan, fees on the new one, and term extensions that increase total interest. The calculator compares total interest so you see the real difference.