Calculation method
Accrue monthly interest at APR/12, apply regular and recurring extra payments, and apply any lump sum in its selected month. Compare against the same regular payment alone. Cap each payment at the remaining amount owed.
Auto · General formulas
Auto Loan Extra Payment and Payoff Calculator
Compare regular auto loan repayment with recurring and one-time extra principal payments, including payoff time, interest savings and a monthly schedule. Use the example values or enter your own numbers to explore an estimate.
Currency formatting only—not an exchange-rate conversion. No country-specific tax or government rules are applied.
Your results
See a clear estimate
Enter your details to see a personalized calculation, a simple projection, and the assumptions behind it.
Free to use
No sign-up required
Device saving only when requested
FREE TOOLS · NO ACCOUNT
Compare, keep and export
Calculate first to compare a snapshot or export your current results. No values are sent to our server.
The PDF includes active input values and option labels, results, sources, model assumptions, and the schedule when available. Schedule periods follow the model: years, months, or actual payments.
Up to three comparison snapshots
Optional device-only storage
Share assumptions, never dollar amounts
Links include eligible rate, term or frequency assumptions only. Dollar amounts are never included. Recipients must enter their own amounts; the link will not reproduce your full financial scenario.
Assumptions & limits
- Example: a 1,000 balance at 0% with a 300 regular payment is paid in 4 months; adding 100 monthly repays it in 3, with a 200 final payment.
- A reducing-balance fixed-rate illustration, not a precomputed-interest loan. Confirm lender principal allocation and penalties. Extra payments stop after payoff.
- Basis: User-entered values.
- Basis: Standard fixed-payment and time-value-of-money formulas.
Source/rule review year: Not applicable — general mathematical model.