Car Loan Early Payoff Calculator
Compare recurring extra payments, a one-time lump sum, or both without waiting for a separate Calculate button.
| Measure | Standard | Accelerated |
|---|---|---|
| Payoff month | July 2030 | October 2029 |
| Total interest | $2,546 | $2,047 |
| Modeled monthly payment | $470 | $570 |
| One-time lump sum applied | $0 | $0 |
Standard and Accelerated Balance Paths
The standard path reaches $0 after 48 months. The accelerated path, including the actually applied lump sum of $0, reaches $0 after 39 months.
Accelerated Amortization Schedule
Months shown below make the effect of the modeled lump sum and recurring payment auditable. The full calculation runs locally in your browser.
| Month | Starting balance | Payment | Lump sum | Interest | Ending balance |
|---|---|---|---|---|---|
| 1 | $20,000 | $570 | $0 | $100 | $19,530 |
| 2 | $19,530 | $570 | $0 | $98 | $19,058 |
| 3 | $19,058 | $570 | $0 | $95 | $18,584 |
| 4 | $18,584 | $570 | $0 | $93 | $18,107 |
| 5 | $18,107 | $570 | $0 | $91 | $17,628 |
| 6 | $17,628 | $570 | $0 | $88 | $17,146 |
| 39 | $397 | $399 | $0 | $2 | $0 |
How Lump-Sum Car Payments Affect Payoff
Use the comparison to separate the effect of recurring payments from a one-time payment.
How the model works
The standard schedule uses the calculated scheduled payment. The accelerated schedule adds the recurring amount and subtracts the selected lump sum in the selected month.
- Interest is calculated from the balance after the lump sum.
- A final payment is reduced to the amount needed to reach a zero balance.
- The selected payment month is counted from the current month.
Methodology and limitations
This is a deterministic estimate, not a lender payoff quote. Actual interest accrual, posting dates, principal-only instructions, fees, and prepayment rules vary by lender.
- The scheduled payment is not re-amortized after the lump sum.
- Taxes, fees, late payments, and payment holidays are not modeled.
- Ask the lender how extra funds are applied before sending a lump sum.
Check before paying extra
Keep enough cash for emergency needs and compare this loan rate with other high-cost debt and savings priorities. A lender statement remains the source for the exact payoff amount.
Frequently Asked Questions
Can I use a lump sum to pay off a car loan early?
Yes. This calculator models a one-time lump sum in a selected month, with or without a recurring extra monthly payment. Confirm how your lender applies extra money to principal.
Does the lump sum reduce the monthly payment?
This estimate keeps the scheduled payment unchanged after the lump sum. A lender may instead recalculate the payment or apply the money under different servicing rules.
What does this car payoff estimate include?
It compares a standard amortization schedule with an accelerated schedule and reports modeled payoff months, interest, and savings. It does not include taxes, fees, prepayment penalties, or lender-specific payment timing.