Auto Loan Calculator with Trade-In

Calculate your auto loan payment factoring in your trade-in vehicle value, remaining payoff balance, down payment, sales tax, and fees.

How Trade-In Affects Your Auto Loan

When you trade in a vehicle, its value is subtracted from the new car price. However, if you owe more than the trade-in is worth (negative equity), the difference is added to your new loan. Understanding this is critical to avoiding an upside-down loan situation.

Auto Loan with Trade-In Formula

Net Trade-In = Trade-In Value − Payoff Balance

Taxable Amount = Vehicle Price − Trade-In Value (in most states)

Amount Financed = Vehicle Price + Tax + Fees − Trade-In Credit − Down Payment

Trade-In Equity Scenarios

Scenario	Example	Impact
Positive Equity	Worth $10K, owe $5K	$5K credit reduces loan
Zero Equity	Worth $8K, owe $8K	No impact on loan
Negative Equity	Worth $8K, owe $12K	$4K added to new loan

Frequently Asked Questions

Should I sell privately or trade in?

Selling privately typically nets you $1,000-$3,000 more than a trade-in. However, trading in is more convenient and in many states, you only pay sales tax on the difference (new price minus trade-in), which can save you hundreds.

What if I owe more than my trade-in is worth?

This is called negative equity or being "upside down." The remaining balance gets rolled into your new loan, increasing both the amount financed and your monthly payment. Try to pay down the difference before trading in if possible.

Does trade-in reduce sales tax?

In most states, yes. If you buy a $35,000 car and trade in one worth $8,000, you only pay sales tax on $27,000. This saves hundreds of dollars. However, some states (like California) do not offer this benefit.