Trade-In Tax Credit by State (2026), and How Rebates Are Taxed

Savings are for a $30,000 car with a $10,000 trade-in, at the state's lowest local rate. Tap a state for its sales tax calculator.

When you trade in a car at a dealer, most states charge sales tax only on the difference between the new car's price and the trade-in value. Buy a $30,000 car, trade in one worth $10,000, and you pay tax on $20,000. The saving is the trade-in value times your tax rate.

The credit usually applies only when the trade-in is part of the same deal at a dealer. Selling your old car privately and then buying from a dealer usually means paying tax on the full price, though a few states make exceptions, so check with your state before you sell.

Alaska, Montana and New Hampshire have no sales tax on car purchases, so a trade-in has no tax effect there.

A manufacturer rebate is money the carmaker pays toward the purchase. Some states tax the price before the rebate, as if you paid the full amount; others tax the price after it. A dealer discount, which simply lowers the price, reduces the tax in every state.

On the offer sheet, check whether a reduction is listed as a rebate or as a discount, since the label can change the tax.

Each rule comes from the state's revenue department, statute or motor vehicle agency, with its source and check date on the state's sales tax page. Savings use the same formulas as our calculators. See our methodology.