Runs in your browser · Last updated 7 September 2026
Free Auto Loan Extra Payment Calculator
Free auto loan extra payment calculator. Extra principal on the current note — months and interest saved. Browser tool — nothing is uploaded.
Fixed-rate remaining term. This is extra principal on the current auto note — not a refinance. Prepayment penalties are rare on US auto loans after 2010; still read the contract.
Scheduled payment
$447.93
Payoff with extra
35 months
Months saved
13
Interest paid
$2,478.02
Interest saved
$1,022.66
Total paid
$20,478.02
How to use this tool
- Enter remaining balance, APR, and months left.
- Add the extra principal you can send every month.
- Read months saved and interest saved versus paying the bill only.
Worked example
$18,000 left at 9% for 48 months is about $448/month. An extra $150 toward principal cuts several months and more than $400 of interest on a typical run. If a dealer offer has a lower APR, compare it on the auto refinance calculator.
Frequently asked questions
- Is this a refinance calculator?
- No. Extra principal on the note you already have. To compare a new APR and fees, use the auto refinance page.
- Simple interest vs precomputed?
- This page amortizes like a simple-interest installment loan. A few older contracts are precomputed — extra payments then follow the contract, not this schedule.
- Will extra payments change my monthly bill?
- Usually no. The scheduled payment stays; the term shortens. Ask the servicer to apply extras to principal, not to the next installment.
- Uploaded?
- No.