Auto Loan Calculator
Estimate your real monthly car payment. Start from the vehicle price and subtract your down payment and trade-in, add sales tax, then see the payment, total interest, and total cost over the loan term.
Your details
- Amount financed
- $32,100.00
- Sales tax
- $2,100.00
- Total interest
- $6,037.11
- Total cost (with down payment)
- $43,137.11
Financed amount vs interest vs tax
- Amount financed
- $32,100.0080%
- Interest
- $6,037.1115%
- Sales tax
- $2,100.005%
Formula
Sales tax = (price − trade-in) × tax rate. Amount financed = price − down payment − trade-in + sales tax. The monthly payment then amortizes that amount at the APR over the term: M = P·r(1+r)^n / ((1+r)^n − 1).
Frequently asked questions
Does a trade-in reduce my sales tax?⌄
In most US states, yes — sales tax applies to the price after the trade-in credit. A few states tax the full price; check your state's rules.
Should I choose a longer term?⌄
A longer term lowers the monthly payment but increases total interest, and can leave you owing more than the car is worth. Compare the total cost across terms.
Sources & methodology
Sales tax is applied to the price net of trade-in (typical US rule). Estimates only — dealer fees and registration are not included.
Related calculators
More Loans →By state
State-specific versions with local tax rates prefilled.
Learn more
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