Auto Loan Payoff Calculator
An auto loan payoff calculator shows your exact debt-free date and interest savings when you pay extra on a car loan: enter your balance, rate, and term, then add extra monthly payments, a lump sum, or biweekly payments — it re-runs the full amortization schedule instantly.
Yearly amortization (with extra payments)
| Year | Principal paid | Interest paid | Remaining balance |
|---|---|---|---|
| Year 1 | $6,047 | $1,870 | $21,953 |
| Year 2 | $6,510 | $1,407 | $15,443 |
| Year 3 | $7,009 | $908 | $8,434 |
| Year 4 | $7,545 | $372 | $889 |
| Year 5 | $889 | $7 | $0 |
Why paying off a car loan early hits harder
Car loans run 60-72 months — far shorter than mortgages or student loans — and interest is front-loaded. Every extra dollar you send to principal stops charging interest immediately, and because the term is short, that dollar keeps working for a bigger share of the loan's life. The effect compounds: kill principal early and every later month bills interest on a smaller balance.
Worked example: $28,000 car loan at 7.4%
Take a typical borrower: $28,000 balance, 7.4% APR, 60-month term. The required payment is $559.73 per month. On the minimum plan you pay $5,584 in interest over 60 months. Add just $100 extra per month: debt-free in 50 months instead of 60 — 10 months earlier, saving $1,021 in interest. Or drop a $3,000 tax refund on it at month 6: paid off in 53 months, saving about $1,100. That's the whole game — principal you kill early never bills you again.
Car loan payoff calculator vs. minimum payments
| Strategy | Payoff time | Total interest | Best for |
|---|---|---|---|
| Minimum ($559.73/mo) | 60 months | $5,584 | Cash-flow tight |
| +$100 extra monthly | 50 months | $4,563 | Steady acceleration |
| $3,000 lump sum at month 6 | 53 months | $4,484 | Windfalls & bonuses |
Before you prepay, run this checklist
- Prepayment penalty — rare on modern auto loans but check your contract for "prepayment penalty" or "precomputed interest" clauses.
- Simple interest vs. precomputed — simple interest (nearly all modern loans) rewards early payoff; precomputed loans charge the full interest amount no matter when you pay off.
- High-rate debt first — if you carry credit cards at 20%+, pay those before a 7% car loan.
- Emergency fund — keep 3-6 months of expenses liquid before stacking prepayments.
- Gap insurance & payoff quote — when you're within a few payments, request an official payoff quote from your lender; the daily interest accrual means the exact payoff amount differs slightly from your calculator estimate.
Does biweekly work for car loans?
Yes — paying half your payment every two weeks adds a 13th full payment each year, which behaves like roughly +8% extra principal annually. On the $28,000 example above it cuts the term by about 3 months on its own. Set the biweekly toggle in the calculator above to see it on your exact loan.
Related payoff guides
The same principal-first approach applies across installment loans. See seven ways to accelerate a loan payoff, then review how daily interest and payment allocation work.
For educational purposes only, not financial advice. Confirm payoff amounts and penalty terms with your lender; figures above are computed from a standard amortization schedule.