Auto Loan Early Payoff Calculator
See what paying extra on your car loan saves in interest, and how much sooner you own the car outright.
Payoff schedule with your extra payment
| Month | Payment | Interest | Principal | Balance |
|---|---|---|---|---|
| 1 | $686.05 | $144.83 | $541.22 | $21,458.78 |
| 2 | $686.05 | $141.27 | $544.78 | $20,914.00 |
| 3 | $686.05 | $137.68 | $548.37 | $20,365.63 |
| 4 | $686.05 | $134.07 | $551.98 | $19,813.65 |
| 5 | $686.05 | $130.44 | $555.61 | $19,258.04 |
| 6 | $686.05 | $126.78 | $559.27 | $18,698.77 |
| 7 | $686.05 | $123.10 | $562.95 | $18,135.82 |
| 8 | $686.05 | $119.39 | $566.66 | $17,569.16 |
| 9 | $686.05 | $115.66 | $570.39 | $16,998.77 |
| 10 | $686.05 | $111.91 | $574.14 | $16,424.63 |
| 11 | $686.05 | $108.13 | $577.92 | $15,846.70 |
| 12 | $686.05 | $104.32 | $581.73 | $15,264.98 |
How this is calculated
The contractual payment is derived from your balance, rate, and months remaining, then a second schedule applies your extra payment to principal each month.
A car loan is a short amortizing loan, and that shape changes how worthwhile early payoff is compared with a mortgage.
The mechanics are the same. Each month, interest is charged on the outstanding balance and the rest of your payment reduces it. Anything extra goes entirely to principal, which removes all the future interest that principal would have accrued. Because the term is short — usually three to seven years rather than thirty — there is less future interest to cancel, so the headline savings are smaller in absolute terms than on a mortgage.
But the case for paying a car loan down early is often stronger, for two reasons that do not show up in the interest figure.
The first is the rate. Car loans commonly carry higher rates than mortgages, and rates on used-car and subprime financing can be dramatically higher. A guaranteed return equal to a 12% or 18% loan rate is very hard to beat anywhere else.
The second is depreciation. A car loses value faster than the loan amortizes in the early years, which means many borrowers spend a period owing more than the car is worth — negative equity. If the car is written off or you need to sell, that gap comes out of your pocket. Paying extra closes it sooner and shortens the window of exposure. This is a risk reduction that no interest calculation captures.
One thing to check before overpaying: how your lender handles precomputed interest. Most modern car loans use simple interest, where paying early genuinely reduces what you owe. A minority use precomputed interest, where the total interest is fixed at signing and paying early saves you little or nothing. The loan agreement will say which, and it changes the answer completely.
Worked examples
$150 extra on a typical loan
$22,000 remaining at 7.9% with 48 months left, adding $150 a month.
Roughly seven months come off the loan for about $1,050 in extra payments. Modest in absolute terms, but the interest saved is a guaranteed 7.9% return on money you would otherwise have kept in a low-yield account.
Load this scenario into the calculatorA high-rate used car loan
$18,000 at 16.9% with 60 months left, adding $200 a month.
At this rate the saving is dramatic. Every dollar of principal removed avoids nearly 17% a year of interest — better than any risk-free return available anywhere, and the strongest case for overpaying you will find.
Load this scenario into the calculatorA 0% dealer finance deal
$25,000 at 0% with 36 months left, adding $200 a month.
Nothing is saved, because there is no interest to avoid. On genuine 0% financing, keep the money in a savings account earning interest and pay the loan exactly on schedule.
Load this scenario into the calculatorWhat this assumes
- The loan uses simple interest, so interest accrues on the outstanding balance. Precomputed-interest loans behave differently and early payoff saves much less.
- Extra payments are applied to principal rather than held as an advance on the next instalment.
- The rate is fixed for the remaining term.
- The required monthly payment is derived from your balance, rate, and months remaining, so it may differ from your contractual payment if you have already overpaid.
- Insurance, registration, warranty, and GAP costs are excluded — this covers the loan only.
Common questions
- Does paying off a car loan early hurt my credit score?
- It can cause a small, temporary dip. Closing an instalment account reduces your credit mix and stops the steady history of on-time payments that account was generating. The effect is usually minor and short-lived, and it is rarely a reason to keep paying interest.
- Is there a penalty for paying off a car loan early?
- Rarely on modern simple-interest loans, but check your agreement. The bigger issue is precomputed interest, where the total interest is fixed at signing — paying early clears the debt but saves little of the interest, because it was never going to accrue based on your balance.
- Should I pay off the car or the credit card first?
- The credit card, almost always. Card APRs are typically two to three times car loan rates, so each dollar clears more future interest there. Pay the car loan's required amount and direct everything spare at the highest rate you carry.
- What is negative equity and does overpaying fix it?
- Negative equity is owing more than the car is worth, which is common early in a loan because cars depreciate faster than the balance falls. Overpaying closes that gap sooner, which matters if the car is written off or you need to sell — standard insurance pays the car's value, not your loan balance.
- Is it better to refinance or to overpay?
- They stack. Refinancing lowers the rate on the whole balance, which is usually the bigger lever if your credit has improved since you bought. Overpaying then works harder against the lower rate. Refinance first if you can, then direct any spare payment at the new loan.
Related calculators
- Credit Card Payoff Calculator — See how long your card takes to clear on minimum payments versus a fixed amount, and what the difference costs you.
- Amortization Schedule Calculator — See the full month-by-month breakdown of any loan — what you pay, what goes to interest, and what you still owe.
- Extra Mortgage Payment Calculator — See exactly how much interest an extra monthly payment saves, and how many years it takes off your mortgage.