Calculator
Auto Loan Payment Calculator
Estimate a monthly car loan payment from vehicle price, down payment, interest rate, and term. The calculator keeps the model simple and transparent: it estimates principal and interest, not taxes, dealer fees, insurance, or trade-in details.
Result
- Monthly auto payment
- $592.62
- Estimated loan amount
- $30,000.00
- Total interest
- $5,557.29
- Total paid
- $35,557.29
Estimated fixed principal-and-interest payment.
Vehicle price minus down payment.
How auto loan payment calculation works
The calculator estimates the financed amount by subtracting down payment from vehicle price.
It then uses the fixed-rate amortization formula to estimate the scheduled monthly principal-and-interest payment.
The model does not automatically add sales tax, title fees, dealer fees, registration, trade-in equity, extended warranties, insurance, or lender fees.
Auto loan payment formula
Loan Amount = Vehicle Price - Down Payment; Payment = P x [r(1+r)^n] / [(1+r)^n - 1]P is the estimated loan amount after the down payment. If taxes or fees are financed, include them in the vehicle price before using the calculator.
- Vehicle Price is the amount being financed before down payment.
- Down Payment is cash paid upfront.
- P is vehicle price minus down payment.
- r is monthly interest rate and n is the number of monthly payments.
What the Numbers Mean
- Vehicle price
- The vehicle amount used in the estimate. Include financed taxes or fees here only if you want them modeled.
- Down payment
- Cash paid upfront that reduces the amount financed.
- Interest rate
- The annual rate used for monthly payment math. Real offers can vary by credit, lender, and vehicle.
- Loan amount
- Vehicle price minus down payment. This is the principal used by the amortization formula.
Assumptions
- The calculator estimates principal and interest only.
- The loan uses a fixed annual interest rate and monthly payments.
- Sales tax, title, registration, dealer fees, trade-in equity, insurance, warranties, and lender fees are excluded unless you fold them into vehicle price.
- The down payment must be lower than the vehicle price.
- The calculator does not model leases, balloon payments, rebates, or variable-rate products.
Worked Examples
$35,000 vehicle with $5,000 down
- Input
- $35,000 vehicle price, $5,000 down, 6.9% rate, 5-year term
- Formula
- P = $35,000 - $5,000 = $30,000; r = 0.069 / 12; n = 60
- Output
- $592.62 monthly payment
The estimated loan amount is $30,000 and total interest is about $5,557.29.
$42,000 vehicle with $7,000 down
- Input
- $42,000 vehicle price, $7,000 down, 7.25% rate, 6-year term
- Formula
- P = $42,000 - $7,000 = $35,000; r = 0.0725 / 12; n = 72
- Output
- $600.93 monthly payment
A longer 72-month term lowers payment pressure but increases the time interest accrues.
$22,000 vehicle with no down payment
- Input
- $22,000 vehicle price, $0 down, 5.5% rate, 4-year term
- Formula
- P = $22,000; r = 0.055 / 12; n = 48
- Output
- $511.64 monthly payment
With no down payment, the full vehicle price is used as the loan amount.
$35,000 vehicle at 0% for 5 years
- Input
- $35,000 vehicle price, $0 down, 0% rate, 5-year term
- Formula
- $35,000 / 60 payments
- Output
- $583.33 monthly payment
At 0%, payments repay the financed amount without interest.
Frequently Asked Questions
How do I estimate an auto loan payment?
Subtract the down payment from the vehicle price, then use the loan amount, interest rate, and term in the fixed-rate amortization formula.
Does this include sales tax and dealer fees?
No. It excludes taxes, title, registration, dealer fees, and warranties unless you include those amounts in the vehicle price input.
Does a larger down payment lower the payment?
Yes. A larger down payment reduces the amount financed, which usually lowers monthly payment and total interest.
Can I use this for a lease?
No. Leases use different inputs and pricing rules. This calculator is for simple fixed-rate vehicle loans.
Does this include auto insurance?
No. Insurance is a separate ownership cost and is not included in the principal-and-interest payment.
What if I have a trade-in?
Use the net effect of the trade-in to reduce the vehicle price or increase the down payment, depending on how you want to model the deal.
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Disclaimer
This calculator provides a simplified auto loan payment estimate. It is not lending, tax, legal, insurance, or financial advice.