Free auto loan early payoff calculator
Enter your loan balance, APR, payment, and extra monthly amount — this auto loan early payoff calculator shows how much interest you save and how many months you cut, updated live, as you type.
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No prepayment penalty assumed. Contact your lender to confirm extra payments apply to principal.
Results are estimates. Consult a professional.
How the auto loan early payoff calculator works
When you make an extra payment on an auto loan, the lender applies it to the principal balance (provided you direct them to do so). A lower principal means less interest accrues the following month, which means a larger slice of every subsequent regular payment also goes to principal. This compounding effect accelerates payoff and reduces total interest paid. The calculator iterates through each month to find your new payoff date and total interest.
Most US auto lenders apply payments in this order: fees first, then interest, then principal. Because auto loans use simple interest (not precomputed interest, which is rarer), any payment made before the due date reduces the principal used to calculate next month's interest — making early or extra payments especially effective early in the loan term.
CFPB: How to pay off auto loans faster; Bankrate auto loan payoff guideWorked example: $50/month extra on a $25,000 loan
Original loan: $25,000 at 7% APR for 60 months. Standard monthly payment: $495.03. Extra monthly payment: $50.00. Total monthly outlay: $545.03.
Interest saved and months cut: $25,000 loan at 7% APR, 60-month term
The table below shows how different extra monthly payment amounts affect total interest paid and loan duration on a $25,000 auto loan at 7% APR with a standard 60-month term. The base monthly payment is $495.03.
| Extra Monthly Payment | Interest Saved | Months Cut | New Payoff |
|---|---|---|---|
| $25/mo | ~$335 | ~3 months | ~57 months |
| $50/mo | ~$649 | ~5 months | ~55 months |
| $100/mo | ~$1,218 | ~9 months | ~51 months |
| $200/mo | ~$2,173 | ~16 months | ~44 months |
Source: CFPB simple-interest amortization; Bankrate payoff calculator. Figures are estimates rounded to nearest $1.
Higher extra payments deliver diminishing marginal interest savings (because the loan ends sooner, leaving less time for interest to compound), but each additional dollar applied to principal always saves more than a dollar in total interest paid over the life of the loan.
Tips for paying off your auto loan early
Paying extra on your car loan is one of the simplest, lowest-risk ways to reduce total borrowing costs — but a few steps ensure the extra money actually reaches your principal rather than sitting in a suspense account.
- Specify 'apply to principal' — when making an extra payment online or by phone, explicitly designate it as a principal-only payment. Without this instruction, some lenders credit it as a future monthly payment, not a principal reduction.
- Check for prepayment penalties — prepayment penalties on auto loans have been rare since the early 2010s, but check your original loan agreement or call your lender to confirm. Federal credit unions are prohibited from charging them; most banks voluntarily dropped them.
- Prioritize high-rate debt first — if you have credit card debt above ~10% APR, pay that down before adding extra auto loan payments. The math favors eliminating the highest-interest obligation first (the debt avalanche method).
- Make one lump-sum payment after a windfall — a tax refund, bonus, or other lump sum applied early in the loan term saves more interest than the same amount spread out over many months, because it lowers the balance for all future interest calculations.
- Refinance first if your rate is high — if your current APR is above 8–9%, consider refinancing to a lower rate before making extra payments. Combining a lower rate with extra payments compounds the savings significantly.
Accuracy and limitations
This calculator uses a standard simple-interest amortization schedule, which matches how the vast majority of US auto loans work. Results are accurate within a few dollars of your actual loan statement when you use the correct current balance, APR, and remaining term. Entering the original loan amount rather than your current payoff balance will produce overstated savings — always use the current outstanding balance.
A small number of older or dealer-arranged loans use a precomputed (Rule of 78s) interest method, in which case extra payments save less because the interest is front-loaded into the fixed payment schedule. If your loan documents mention the 'Rule of 78s' or 'sum-of-digits method,' contact your lender directly for an accurate payoff quote. The Rule of 78s was banned for loans over 61 months by the Truth in Lending Act.
Auto loan payoff terms defined
About this auto loan early payoff calculator
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