Loan Calculator with Trade In and Taxes
Include sales tax in the financed amount.
Sales-tax math computed locally — your figures stay with youYour payment breakdown appears here
Fill in the loan details and press Calculate — the monthly payment, total interest and schedule will render right on this page, with nothing sent to any server.
How to use
Car dealers often roll the sales tax into the loan instead of collecting it up front. When that happens the true financed amount is the price, minus your down payment and trade-in, plus the tax — and the monthly payment reflects that real out-the-door number.
How to use
- Enter the car price and the sales tax rate for your state.
- Add your cash down and the trade-in value.
- Set the APR and term, then press Calculate.
Example
A $28,000 car with 7% sales tax, $2,000 down and a $5,000 trade-in: the tax is $1,960, so the loan becomes 28,000 − 2,000 − 5,000 + 1,960 = $22,960. At 5.9% for 5 years that is about $443 per month. Skipping the trade would push the loan to $27,960 and the payment to about $539.
Formula
Loan = price − down − trade-in + price × tax rate. The tax is calculated on the full price; many states then credit the trade-in value against the taxable amount, so check your local rule.
Should you pay the tax out of pocket?
If you can, pay the tax in cash. Financing the tax means paying interest on it for the whole term. On the example above, paying the $1,960 tax up front would cut the financed amount and save about $300 in interest over 5 years.
State tax rates vary widely
Sales tax on cars ranges from about 0% in a few states to over 10% in others. A 3-point difference in the rate on a $28,000 car changes the financed amount by $840 and the payment by roughly $16.
FAQ
Is tax always rolled into the loan?
No — many buyers pay it up front. This calculator models the financed-tax case so the payment reflects the real total.
Is tax charged on the trade-in too?
Many states tax only the net price after trade-in; a few tax the full price. Check your state rule.
How much does a higher tax rate add?
Each point of sales tax on a $28,000 car adds $280 to the financed amount and roughly $5-6 to the monthly payment.
What is the difference from the plain trade-in tool?
The plain tool ignores tax; this one adds it so the payment matches the dealer quote when tax is financed.
Reviewed by the LoanMath editorial team