: Typically [Price - Rebates - Trade-in] × [Sales Tax Rate].

P=r×L1−(1+r)−ncap P equals the fraction with numerator r cross cap L and denominator 1 minus open paren 1 plus r close paren raised to the negative n power end-fraction : Total Loan Amount (Principal).

How to Calculate Monthly Payments in Excel with PMT Function

The principal is the final amount you finance, not just the sticker price. : Negotiated vehicle price. Add :

: Monthly interest rate (Annual Percentage Rate (APR) ÷ 12 ÷ 100). : Total number of monthly payments (Years × 12). 3. Quick Calculation Tools

: Title/registration fees (usually $150–$600) and dealer documentation fees ($75–$400+). Add-ons : Extended warranties or gap insurance. Subtract :

: Use the Auto Loan Calculator from Calculator.net or the Bankrate Auto Calculator to estimate payments instantly. 4. Average Market Rates (April 2026)

: The value of your old car minus what you still owe on it. Rebates : Manufacturer incentives applied to the price. 2. Standard Car Loan Formula To find your monthly payment ( ) manually, use the fixed-rate amortization formula: