What the payoff estimate does
Each modeled month adds interest to the remaining principal and applies the required payment plus extra principal. The result reports payoff months, estimated interest, and estimated total paid for the entered monthly schedule.
This is an amortization estimate, not an official payoff quote. Actual posting dates, daily interest, fees, skipped payments, and payment-allocation rules can change the amount required on a particular date.
Payment sufficiency checks
The planned payment must exceed the first month's interest and must repay the balance within the calculator's 100-year safety horizon. Otherwise the calculator shows a specific error instead of falsely reporting two months or the loop limit as a payoff date.
At zero interest, payoff months are the balance divided by the planned payment, rounded up for the final partial payment.
Loaded example
For a $22,000 balance at 7.2% annual interest with a $500 required payment and $100 recurring extra principal, the model pays the balance in about 42 months. The final payment is reduced to the amount actually remaining.
Reconciling the estimate
Compare the current principal, interest rate, required payment, and next due date with the latest statement. Confirm whether an extra payment is applied immediately to principal and whether a prepayment penalty or other charge applies.
If you plan to sell or trade the vehicle, obtain a dated payoff amount. A statement balance and payoff amount can differ because interest and fees may continue through the payoff date.
Primary guidance
The CFPB explains how auto-loan payments may be allocated, prepayment considerations, and why a payoff amount matters when trading a vehicle.
Use Auto Loan Refinance only as a separate cash-flow comparison based on a current quote.