Auto Loan Calculator
Calculate your car loan payment including taxes, down payment, and trade-in value.
Before you calculate
Sales tax is applied before subtracting trade-in value. Local trade-in tax credits, registration, dealer fees and insurance may change the actual cost.
Auto Loan Payment Formula
Your financed amount equals the vehicle price (plus sales tax) minus your down payment and trade-in value. That amount is then amortized over the loan term.
Financed = Price × (1 + TaxRate) − Down − TradeInExample Scenarios
Scenario 1: Higher Down Payment Savings
On a $35,000 vehicle at 6.5% APR for 60 months, increasing your down payment from $3,000 to $7,000 reduces monthly payments by ~$63 and saves over $750 in total interest.
Scenario 2: Trade-In Value Impact
A $5,000 trade-in on the same loan has the same effect as a $5,000 down payment — reducing the financed amount and total interest paid over the life of the loan.
Methodology & Assumptions
Sales tax is applied to the vehicle price before subtracting down payment and trade-in. The resulting financed amount is then amortized using the standard PMT formula.
Sources & calculation notes
Maintained by MoneyCalc. Results are estimates based on the inputs and assumptions shown, not personalized financial advice or a lender quote. Default rates are examples unless a specific tax year or official table is identified.
References explain the underlying concepts or rules. They do not endorse or independently certify this implementation.
Calculations run in your browser. Some tools retain settings on this device. Displayed rounding can produce small differences from a statement or contract.