Transparent method
The formula
Worked example
Example inputs
How to interpret the result
A reverse-solved payoff estimate based on a level monthly payment can diverge from a lender's actual payoff quote, because many auto loans accrue interest daily against the actual outstanding balance rather than on the simplified level-payment schedule this kind of estimate assumes.
Before you rely on it
What to check
Compare the reverse-solved estimate against an actual payoff quote requested directly from the lender, since daily interest accrual can produce a somewhat different real figure.
The common error
Where people go wrong with auto loan payoff calculator
Treating a reverse-solved payoff estimate as identical to the lender's actual payoff amount. Daily interest accrual on the real loan can produce a somewhat different figure than a simplified level-payment calculation predicts.
Sensitivity evidence
How annual interest rate changes the estimated payoff term
| Annual interest rate | Estimated payoff term | Estimated total interest | Estimated final payoff total |
|---|---|---|---|
| 5.5% | 51.1 months | $3,098 | $28,098 |
| 6.5% | 52.3 months | $3,777 | $28,777 |
| 7.5%worked example | 53.6 months | $4,502 | $29,502 |
| 8.5% | 55.1 months | $5,278 | $30,278 |
| 9.5% | 56.6 months | $6,111 | $31,111 |
Every input, tested
Which input moves the estimated payoff term most
| Input | Tested from | To | Estimated payoff term at each end | Swing |
|---|---|---|---|---|
| Monthly payment | $495 | $605 | 60.9 months to 48.0 months | 12.9 months (24%) |
| Amount borrowed | $22,500 | $27,500 | 47.4 months to 60.1 months | 12.7 months (24%) |
| Annual interest rate | 6.5% | 8.5% | 52.3 months to 55.1 months | 2.7 months (5.1%) |
Two variables at once
Estimated payoff term by annual interest rate and amount borrowed
| Annual interest rate \ Amount borrowed | $20,000 | $25,000 | $30,000 |
|---|---|---|---|
| 5.5% | 39.9 months | 51.1 months | 62.9 months |
| 6.5% | 40.6 months | 52.3 months | 64.8 months |
| 7.5% | 41.4 months | 53.6 months | 66.9 months |
| 8.5% | 42.2 months | 55.1 months | 69.2 months |
| 9.5% | 43.1 months | 56.6 months | 71.7 months |
Step by step
The worked example, input by input
| Input | Value used |
|---|---|
| Amount borrowed | $25,000 |
| Annual interest rate | 7.5% |
| Monthly payment | $550 |
| Estimated payoff term | 53.6 months |
| Estimated total interest | $4,502 |
| Estimated final payoff total | $29,502 |
Where the inputs come from
Amount borrowed is the current principal balance from your latest statement or payoff quote, not the original loan. Annual interest rate is on the statement, and monthly payment is what you actually send, including any extra. Confirm that the lender applies extra payments to principal and does not treat them as early installments. Simple-interest auto loans accrue interest daily, so the timing of payments matters slightly.
When the result stops applying
The result assumes a fixed payment and rate, and no missed payments or fees. Some loans use precomputed interest, where early payoff saves less, and a few have prepayment penalties. Paying the loan off does not raise your credit score much, and closing an installment loan can slightly reduce your mix of credit. Check the payoff figure with your lender.
What to compare it with
See the standard loan math on the loan payoff and loan term calculators, and the refinance option on the auto refinance page. The rule of 78 calculator matters if your loan uses that method. The debt-free date and snowball pages help if you have other debts to clear.
People also ask
Frequently asked questions
Will paying extra on my car loan save interest?
Yes on a simple-interest loan, since interest accrues on the remaining balance. Make sure the lender applies the extra to principal.
Is it better to pay off a car loan or invest?
It depends on the rate. Paying off a 7% loan is a guaranteed 7% return, which beats many safe alternatives but may trail long-run investing.
Does paying off a car loan early hurt my credit?
It can cause a small dip because an open account with good history closes, but the effect is usually minor and short-lived.