🧾 Car Sales Tax Calculator

How Car Sales Tax Works in the US

When you buy a car, you pay sales tax to the state where you register the vehicle — not necessarily where you bought it. Tax rates vary significantly by state, from 0% in five states to over 7% in others. In many states, local county and city taxes are added on top of the state rate, which is why your actual tax bill can be higher than the base state rate shown here.

States With No Car Sales Tax

Five states charge no sales tax on vehicle purchases: Alaska, Delaware, Montana, New Hampshire, and Oregon. If you live in one of these states, you pay $0 in state sales tax regardless of the vehicle price. Note that some cities in Alaska do levy local sales taxes, but there is no statewide rate.

How Trade-Ins Affect Your Tax

In most states, your trade-in value is deducted from the taxable amount before sales tax is calculated. This is one of the most overlooked tax advantages of trading in at a dealership rather than selling privately. For example, if you buy a $35,000 car and trade in a vehicle worth $10,000, you pay tax on $25,000 instead of $35,000 — a meaningful savings at a 6% tax rate.

However, not every state offers the full deduction. California, Hawaii, Virginia and Washington D.C. give no trade-in credit at all — you pay tax on the full price. Michigan caps the credit at $12,000 for 2026. Oklahoma applies the credit only to its 1.25% sales tax, not to the 3.25% excise tax. Illinois's old $10,000 cap was removed in 2022, so Illinois now credits the full trade-in. Selling privately gives up this saving entirely, which is worth pricing before you choose between a private sale and a trade.

How Manufacturer Rebates Affect Tax

Manufacturer rebates (cash back from the automaker) usually do not reduce the taxable amount: in most states you pay tax on the price before the rebate, because the rebate is treated as the manufacturer paying part of the price on your behalf. Maryland, for example, lists manufacturer rebates explicitly as part of the taxable price. A minority of states — Virginia among them — let the rebate come off first. The calculator defaults to the common rule and switches automatically for Virginia; change the "Is the rebate taxed" setting if your state treats it differently. Dealer discounts are different from rebates: a lower negotiated price is a lower taxable price everywhere.

Local Taxes on Top of State Rates

Many states allow counties and cities to charge additional local sales tax. The rates shown in this calculator are state-level base rates. Your actual rate could be 0.5% to 3% higher depending on your county and city. For example, California's state rate is 7.25%, but Los Angeles County adds 2.25%, bringing the total to 9.5% for LA residents. Always check your local rate before finalizing your budget.

When Do You Pay Car Sales Tax?

Sales tax is typically collected by the dealer at the time of purchase and remitted to the state. If you buy from a private seller, you generally pay sales tax when you go to register the vehicle at your state's DMV. Some states also charge use tax on vehicles brought in from another state.

Buying Out of State: Which Rate Applies?

Your registration state's rate applies, not the seller's. Every state that taxes vehicle sales also has a companion use tax that applies to cars brought in from elsewhere, assessed when you title and register. Buying in a no-tax state and registering at home doesn't remove the bill — it just moves it from the dealership to the DMV, where it's due in cash rather than financed.

If the selling state did collect tax, your home state credits it against what you owe, but the credit is capped at your home liability and never refunds an excess. On a $35,000 car with a home rate of 5.6%, letting a 6.5% state collect its own rate costs you $315 that you cannot recover. Ask an out-of-state dealer to collect your rate or none at all.

One more cost is easy to miss: driving several states away usually means not bringing a trade-in, which forfeits the trade-in credit built into this calculator. On a $40,000 purchase with a $14,000 trade-in, that credit is worth $784 in Arizona and $875 in Texas. Full breakdown of out-of-state purchases here.

Car Sales Tax Rates by State (2026)

Base state rates for vehicle purchases. Local rates vary by county and city.