Pay Off a Car Loan Early With Extra Payments
See how an extra $150 a month pays off a $25,000, 6.5% car loan 15 months sooner and saves about $1,125 in interest, with a worked example.
By Farrow (pseudonym; identity and professional credentials are not disclosed) · November 8, 2026. This guide is educational information, not tax advice.
Most car loans use simple interest, which makes extra payments especially effective. Every extra dollar lowers the balance right away, so the interest charged next month is smaller. Here is what that looks like on a real loan.
The example loan
Suppose you owe $25,000 at 6.5% and pay $500 a month. On that schedule it takes 59 months, a little under 5 years, and you pay about $4,235 in interest.
Adding $150 a month
Paying $650 instead of $500 clears the loan in 44 months. Interest falls to about $3,110. That is roughly $1,125 less interest and the car is paid off 15 months sooner.
Even a small amount helps
An extra $25 a month on the same loan finishes in 56 months, 3 months early, and saves about $242 in interest. You do not need a big number for it to matter, and you can stop or change the amount whenever your budget changes.
Before you pay extra
- Ask your lender whether extra money goes to principal, not to next month's payment.
- Check the loan for a prepayment penalty, which is uncommon but possible.
- Compare your rate with other goals. A 6.5% loan may be worth paying down before saving at a lower rate, but not before clearing higher-rate debt.
Try your own balance, rate and extra amount in the loan payoff calculator, check a new loan with the auto loan calculator, and see the same idea on a home loan in what an extra $200 a month saves on a mortgage. Figures are estimates.