Car Sales Tax Calculator (2026)
To estimate car sales tax, multiply the vehicle price by your state's combined sales tax rate. On a $30,000 car, that ranges from $0 in no-tax states to over $2,850.00 where combined rates near 9.5%. Select your state below; in most states a trade-in lowers the taxable amount.
How is car sales tax calculated?
Multiply the vehicle price by your state's combined sales tax rate. Trade-in credits often lower the taxable amount.
Does a trade-in reduce car sales tax?
In most states, yes. Tax applies to the price after the trade-in value is subtracted.
Is car sales tax the state rate or combined?
It is usually the combined state-plus-local rate at your registration address, not just the state rate.
What about used cars?
Used vehicles are taxed the same way as new ones, on the agreed purchase price.
How does car sales tax work?
When you buy a vehicle, your state charges sales tax on the purchase price. The rate is generally the same combined state-plus-local rate that applies to other goods. You pay it at registration, not always at the dealer.
The taxable amount is usually the negotiated price. In most states a trade-in reduces it, so you are taxed only on the difference. Rebates and dealer fees are treated differently from state to state.
How much is sales tax on a $30,000 car?
| State | Combined rate | Tax on $30,000 | Total |
|---|---|---|---|
| California | 8.99% | $2,697.00 | $32,697.00 |
| Texas | 8.2% | $2,460.00 | $32,460.00 |
| Missouri | 8.44% | $2,532.00 | $32,532.00 |
How do you calculate vehicle sales tax step by step?
- Start with the agreed vehicle price.
- Subtract any trade-in value if your state allows it.
- Multiply the result by your state's combined sales tax rate.
- That is your car sales tax; add it to the price for your out-the-door tax figure.
What else affects the final number?
Local rates vary by county, so two buyers in the same state can pay different tax. Some states cap vehicle tax or use a flat rate. Title, registration, and documentation fees are separate from sales tax.