Auto Refinancing Interest Rate Calculator
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Reviewed by Calculator Editorial Team
Refinancing your auto loan can save you money if current interest rates are lower than your existing rate. Use this calculator to estimate potential savings when considering refinancing your auto loan.
How to Use This Calculator
Enter your current loan details and the new interest rate you're considering to calculate potential savings. The calculator will show you:
- Estimated monthly payment difference
- Total interest savings over the loan term
- Comparison chart showing payment breakdown
Use the results to decide whether refinancing makes financial sense for your situation.
How Auto Refinancing Works
Auto refinancing involves replacing your existing auto loan with a new loan that typically has better terms, such as a lower interest rate. The process usually includes:
- Getting a new loan quote from a lender
- Paying off your existing loan
- Starting the new loan with improved terms
Monthly Payment Formula
Monthly payment = (Loan amount × (Interest rate/12)) / (1 - (1 + (Interest rate/12))-Loan term (months))
Refinancing is most beneficial when current market rates are significantly lower than your existing rate and you can secure a good refinancing rate.
Worked Example
Let's say you have a $20,000 auto loan with a 7.5% interest rate and 48 months remaining. If you can refinance at 4.5%, here's what the calculator would show:
| Scenario | Monthly Payment | Total Interest |
|---|---|---|
| Current Loan | $452.38 | $1,152.38 |
| Refinanced Loan | $364.58 | $360.38 |
In this example, refinancing would save you $87.80 per month and $792 in total interest over the loan term.
Frequently Asked Questions
The savings depend on the difference between your current interest rate and the new rate, as well as your loan amount and term. Use this calculator to estimate your potential savings.
Refinancing may not always be beneficial. Consider factors like closing costs, the time it takes to refinance, and whether you'll keep the vehicle long enough to see savings.
Closing costs typically range from $300 to $1,000, depending on the lender and loan amount. These costs should be factored into your decision.