Auto Loan Early Payoff
See how much interest and time you save on a car loan by paying a little extra each month.
Month-by-month simulation
Models the loan payment by payment, so the interest and months saved are exact for your inputs.
Tell your lender
Extra money only saves interest if it is applied to principal, not the next payment.
How early payoff works
Smaller balance, less interest
A car loan charges interest each month on the balance you still owe. When you pay extra toward principal, the balance drops faster, so less interest accrues every month after that — and because the balance keeps shrinking, the saving compounds. Paying a modest amount extra each month can knock months off the loan and save hundreds in interest.
The scheduled payment comes from the standard amortization formula. The calculator then simulates each month: interest is the balance times the monthly rate, and everything else — including your extra — reduces principal.
interest = balance × (APR ÷ 12) · principal paid = payment + extra − interestThe Consumer Financial Protection Bureau notes that auto-loan interest is front-loaded, so the earlier in the loan you add extra principal, the more interest you remove.
You owe 25,000 at 6.5 % APR with 60 months left, and you can add 100 a month.
Find the scheduled payment
The amortized payment on 25,000 over 60 months at 6.5 % is about 489.15.Add the extra
You pay 589.15 a month, with the extra 100 going straight to principal.Watch the balance fall
Each month a little more of your payment is principal, so the loan shrinks faster.Read the saving
The loan clears in 49 months — 11 months early — and you pay about 865 less interest.
Paying off a loan early is a guaranteed return equal to its interest rate — but it is not always the top priority.
Clear higher-rate debt first
A 20 % credit card costs far more than a 7 % car loan — pay that down before prepaying the car.
Keep an emergency fund
Don't drain your cash buffer to prepay; an unexpected bill on a credit card undoes the saving.
Check for penalties
Confirm your loan has no prepayment penalty before making large extra payments.
If your only debt is the car loan and you have a healthy emergency fund, extra payments are one of the safest, simplest ways to put your money to work.
The interest saved is the headline: the dollars you keep by not paying interest on a balance you cleared early. Months saved is how much sooner you are debt-free. The scheduled payment is shown so you can see the base you are adding to. Try doubling the extra payment and watch both figures jump — the relationship is not linear, because paying down principal early removes the most future interest. Compare a few scenarios before you commit: even a small, sustainable extra you can keep up every month often beats a large one you abandon after a few payments, since consistency is what drives the balance down.
The simulation is exact for the inputs, but real loans have details it does not model.
A planning estimate
This calculator covers principal and interest only. It excludes taxes, fees, gap insurance, and any prepayment penalty, and it assumes every extra dollar is applied to principal on the payment date. Daily-interest loans and lender rounding can shift the figures slightly. Confirm how your lender handles extra payments, and consult a financial advisor for decisions that affect your wider budget.