About the Car Loan Calculator
Dealership financing conversations move fast, and it's easy to focus on the monthly payment number without fully grasping how the down payment, interest rate, and loan length each independently affect that figure — and how much interest accumulates over the life of a longer loan term.
This calculator uses the same amortization formula lenders use to compute a fixed monthly auto loan payment, letting you see immediately how adjusting the down payment, APR, or loan term changes both your monthly payment and the total interest paid over the loan.
Frequently Asked Questions
Why does a longer loan term lower my payment but cost more overall?
Spreading the same loan amount over more months reduces each individual payment, but you pay interest for a longer period, which increases the total interest paid over the life of the loan.
Does this include sales tax, registration, or fees?
No — this estimate covers only the vehicle price minus your down payment/trade-in value, financed at the given rate and term. Taxes, title, registration, and dealer fees would need to be added to the financed amount separately.
How much should I put down on a car?
A larger down payment reduces both your monthly payment and total interest paid, and helps avoid being "underwater" (owing more than the car is worth) in the loan's early months, though the right amount depends on your overall budget and savings goals.