Estimate your monthly car payment including trade-in, sales tax and fees.
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How is a monthly car loan payment calculated?
Amount financed = price + sales tax + fees − down payment − trade-in, with sales tax applied to (price − trade-in); the monthly payment then uses the standard amortization formula. For example, a 32,000 car with 4,000 down, a 3,000 trade-in, 7% tax, 600 fees and 6.5% APR over 60 months is roughly 530 per month. Tax handling varies by region.
Understanding your result
Tax handling varies by region; many U.S. states tax the price after the trade-in, which this tool assumes. Check your local rule for an exact figure.
Formula and method
Amount financed = price + sales tax + fees − down payment − trade-in, where sales tax is applied to (price − trade-in). Monthly payment uses the standard amortization formula.
Worked example
A 32,000 car with 4,000 down, a 3,000 trade-in, 7% sales tax, 600 fees and 6.5% APR over 60 months is roughly 530 per month.
How to use this tool
- Enter the vehicle price, down payment and trade-in.
- Add your sales tax rate, fees, APR and term.
- Press Calculate.
About the Auto Loan Calculator
The Auto Loan Calculator works out your monthly car payment after the down payment and trade-in, including sales tax and fees, so you can budget the real cost of financing a vehicle.
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Frequently asked questions
Does a trade-in lower my tax?
In many regions, yes — sales tax is charged on the price minus the trade-in value, which is how this calculator estimates it.