Auto Loan Refinance Calculator
See if refinancing your car loan is worth it.
All calculations happen locally in your browser — nothing is uploaded, stored or tracked.
Enter your current loan
Balance, rate and months remaining.
Enter the new offer
Rate and term, plus any fees.
Compare
Payment, interest and break-even.
What Is Auto Loan Refinancing?
Auto refinancing replaces your current car loan with a new one, typically to capture a lower rate (if rates have fallen or your credit improved) or to adjust the term.
The calculator compares your current loan with the new offer: monthly payment, remaining interest and the break-even point if the refinance has fees.
The Comparison
Both loans are amortised over their remaining terms. Savings = old total remaining interest − new total interest. Break-even = fees ÷ monthly savings.
Your data never leaves your device.
Every calculation on this site runs in your browser using vanilla JavaScript. Nothing is uploaded, stored or tracked.
- 100% local, client-side calculations
- No data stored on any server
- No tracking, no analytics, no ads scripts
- Works offline once loaded
Frequently Asked Questions
When should I refinance my car loan?
When you can get a meaningfully lower rate and you plan to keep the car past the break-even point.
How much can I save?
The calculator compares total remaining interest on both loans — the difference is your saving.
Should I extend the term to lower the payment?
Extending the term lowers the payment but can increase total interest — the comparison makes the trade-off visible.
What is negative equity?
Owing more than the car is worth. Refinancing does not fix it; you may need to cover the gap.
Does refinancing affect my credit?
The application causes a small temporary dip; multiple applications within a short window count as one for auto loans.