finance calculator

Car Payment Calculator

Enter vehicle price, down payment, trade value, tax rate, and APR to estimate your monthly car payment.

Results

Monthly payment
$540 USD
Total paid over term
$38,851 USD

How to use this calculator

  1. Enter vehicle price, down payment, and trade-in value.
  2. Enter sales tax %, APR, and term in months.
  3. We compute the financed amount, monthly payment, and total paid over the term.

Inputs explained

Vehicle price
Sticker or negotiated price before taxes/fees.
Down payment
Cash you’re paying upfront.
Trade-in value
Value of your trade; reduces amount financed.
Sales tax %
Local tax rate applied to the taxable price.
Interest rate (APR)
Annual percentage rate of the auto loan.
Term (months)
Number of monthly payments (e.g., 36–84 months).

How it works

We subtract your down payment and trade value from the sticker price, apply sales tax, then calculate the payment using the APR and term.

Outputs include monthly payment and the total you’ll spend across the full term.

Formula

Loan amount = (Price − Down − Trade) × (1 + tax)
Monthly payment = Loan * [r(1+r)^n] / [(1+r)^n − 1]

When to use it

  • Comparing dealer or bank offers with different rates and terms.
  • Seeing how a larger down payment or higher trade value lowers payments.
  • Budgeting monthly cost before visiting the dealership.

Tips & cautions

  • Longer terms lower monthly payments but increase total paid—check both outputs.
  • Add fees or negative equity into the vehicle price for a conservative estimate.
  • Tax rules vary by state; adjust the tax rate or taxable amount if needed.
  • Does not include registration, documentation fees, or add-ons unless added to price.
  • Assumes fixed-rate, fully amortizing monthly payments.
  • Simple tax treatment; some states tax price minus trade or have caps/exemptions.

Worked examples

$35k car, $5k down, 7% tax, 6.5% APR, 72 months

  • Loan = (35k − 5k) × 1.07 = $32,100
  • Payment ≈ $532.22
  • Total paid ≈ $38,320

Same car with $7k down

  • Loan = (35k − 7k) × 1.07 = $29,960
  • Payment drops to ≈ $463

Deep dive

This car payment calculator estimates monthly payment and total cost after down payment, trade value, sales tax, APR, and term. Enter your deal details to see what you’ll really pay each month.

Use it to compare offers and spot the total cost of stretching the term. Add fees or negative equity into the price for a conservative estimate.

FAQs

Does this include registration or dealer fees?
No. Add them to the vehicle price before running the calculation, or include them as part of the sales tax percentage.
Can I compare multiple terms?
Yes. Adjust the term input to 36, 48, 60, or 72 months to see how payments change.

Related calculators

Estimates only. Dealership financing programs may include additional fees or incentives.