Auto Refinance Calculator
Check whether refinancing your car loan saves money.
Enter your values
Enter the remaining balance in $.
Enter the current payment in $.
Enter the months remaining you are working with.
Enter the new rate in %.
Enter the new term in months.
Enter the refinance fees in $.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Lifetime saving
- -$439.89
- New monthly payment
- $426.04
- Monthly difference
- $53.96
- Verdict
- Keep the current loan
Quick answer
Refinancing helps when the new rate lowers total remaining interest by more than the fees to switch.
saving = old remaining cost - new total cost - fees
At a glance
| What it does | Check whether refinancing your car loan saves money. |
|---|---|
| Category | Finance |
| Inputs needed | Remaining balance, Current payment, Months remaining, New rate, New term, Refinance fees |
| Main output | Lifetime saving |
| Formula | saving = old remaining cost - new total cost - fees |
| Cost | Free — no sign-up, no download |
How to use the Auto Refinance Calculator
- 1Enter your current balance, payment and months left.
- 2Enter the rate and term you have been offered.
- 3Watch for a longer term that lowers payments but raises total cost.
Inputs explained
- Remaining balance($)
- Enter the remaining balance in $.
- Current payment($)
- Enter the current payment in $.
- Months remaining
- Enter the months remaining you are working with.
- New rate(%)
- Enter the new rate in %.
- New term(months)
- Enter the new term in months.
- Refinance fees($)
- Enter the refinance fees in $.
Worked example
Using the values the calculator loads with:
Inputs
- Remaining balance18000 $
- Current payment480 $
- Months remaining42
- New rate6.4 %
- New term48 months
- Refinance fees150 $
Results
- Lifetime saving-$439.89
- New monthly payment$426.04
- Monthly difference$53.96
- VerdictKeep the current loan
Frequently asked questions
Does refinancing hurt my credit?
A hard inquiry causes a small temporary dip; rate shopping within 14 days usually counts once.
Can I refinance if I am upside down?
It is harder — lenders usually cap loan-to-value near 120%.
What do I need to enter into the Auto Refinance Calculator?
Just 6 values: remaining balance, current payment, months remaining, new rate, new term, refinance fees. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Auto Refinance Calculator work out the answer?
Refinancing helps when the new rate lowers total remaining interest by more than the fees to switch. It applies the formula saving = old remaining cost - new total cost - fees and shows the working so you can check each step by hand.
Is the Auto Refinance Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.