Missouri's car sales tax rate and how it applies to your purchase

Missouri charges 4.225% sales tax on vehicle purchases at the state level. However, your total tax bill also includes a local sales tax that varies by county and city — so the amount you actually pay depends on where you buy the car and where you live.

When you buy a vehicle in Missouri, the dealer collects both the state tax and your local tax at the time of sale. The total combined rate ranges from about 5.225% to 10.725%, depending on your location. For example, if you buy a car in St. Louis city, you'll pay a higher combined rate than if you buy one in a rural county with lower local taxes.

The tax is calculated on the purchase price of the vehicle. If you trade in an old car, Missouri allows you to subtract the trade-in value from the sale price before the tax is applied — so you only pay tax on the difference.

Key Takeaways

  • Missouri's state sales tax on cars is 4.225%, but your total rate includes local taxes that vary by county and city.
  • Combined sales tax rates across Missouri range from approximately 5.225% to 10.725% depending on your location.
  • The tax is calculated on the vehicle's purchase price minus any trade-in value you receive.
  • You pay the tax when you buy the car, and the dealer collects it at the time of sale.

How local taxes add to the state rate

Every Missouri county and many cities add their own sales tax on top of the state rate. These local taxes fund schools, roads, and other services in your area. The local rate can be anywhere from 1% to 6.5% depending on where you are.

For example, Boone County (where Columbia is located) has a combined rate of about 7.225%, while Jackson County (Kansas City area) is around 8.725%. St. Louis city has one of the highest rates in the state at approximately 10.725%. Rural counties with fewer local taxes may have rates closer to 5.225%.

The dealer will know the exact rate for your location and will show it on your bill of sale before you sign. If you're buying from a dealer in one county but registering the car in another, Missouri taxes the sale based on where the dealer is located, not where you live.

What the tax covers and what it doesn't

Sales tax applies to the full purchase price of the vehicle, including any add-ons the dealer installs (like floor mats, paint protection, or upgraded wheels). It does not explore to financing charges, loan interest, or extended warranties you purchase separately.

If you buy a used car from a private seller rather than a dealer, you still owe sales tax when you register it with the Missouri Department of Revenue. You'll pay the tax at the time of registration, not at the time of purchase. The amount is based on the vehicle's fair market value, which the state determines using published guides.

Certain vehicles may be exempt or taxed differently — for example, vehicles used for specific commercial purposes or vehicles purchased by certain organizations. These situations are rare and usually involve paperwork filed with the state.

Trade-in credits and how they reduce your tax bill

If you trade in an old vehicle as part of your purchase, Missouri allows you to subtract the trade-in value from the sale price before calculating tax. This is called a trade-in credit, and it can significantly lower your tax bill.

For example, if you buy a car for $20,000 and trade in a vehicle worth $5,000, you only pay tax on $15,000. At a combined rate of 8%, that saves you $400 compared to paying tax on the full $20,000 purchase price.

The dealer will handle this calculation on your bill of sale. Make sure the trade-in value is clearly listed so you can verify the tax was calculated correctly. If you're not trading in a vehicle, you pay tax on the full purchase price.

Registering a car you bought out of state

If you buy a car in another state and bring it to Missouri, you'll owe Missouri sales tax when you register it. The tax is based on the vehicle's fair market value, not what you paid for it, and you pay it at the time of registration with the Missouri Department of Revenue.

This rule exists to prevent people from avoiding Missouri taxes by purchasing vehicles elsewhere. The state uses published valuation guides to determine fair market value if there's a question about what the car is worth. You'll need your bill of sale from the out-of-state purchase when you register.

If you already paid sales tax in the other state, Missouri may give you a credit for part of that amount, though the credit is limited. Contact your local Missouri license office or the Department of Revenue to understand how much credit you'll receive.

Finding your exact local tax rate

To find the exact combined sales tax rate for your location, you can use the Missouri Department of Revenue's sales tax lookup tool on their website, or you can call your local license office. You'll need to know your county and city.

If you're buying from a dealer, they can also tell you the exact rate before you finalize the purchase. The rate should appear on your bill of sale and purchase agreement, so you can see exactly what you're paying in tax.

Keep in mind that tax rates can change, though this happens infrequently. If you're planning a car purchase, check the current rate a few days before you buy to make sure you have the right number for your budget.

Frequently Asked Questions

Do I pay sales tax on a car I buy from a private seller?

Yes. You pay sales tax when you register the vehicle with the Missouri Department of Revenue, not when you buy it. The tax is based on the vehicle's fair market value according to state valuation guides. You'll pay it at your local license office when you complete the registration.

Can I deduct sales tax on a car purchase from my federal income taxes?

No. Sales tax on vehicle purchases is not deductible on your federal tax return. However, if you use the vehicle for business purposes, you may be able to deduct depreciation or other business expenses — consult a tax professional about your specific situation.

What if the dealer and I disagree on the sales tax amount?

Ask the dealer to show you the calculation on your bill of sale, including the purchase price, trade-in value, and the tax rate used. If you believe the rate is wrong, contact your local Missouri license office or the Department of Revenue to confirm the correct rate for your location. Keep your bill of sale as proof of what you paid.

Do I owe sales tax if I inherit a car?

No. Inherited vehicles are not subject to sales tax. However, you will need to register the vehicle in your name with the Missouri Department of Revenue, and you'll need to provide proof of inheritance (such as a will or court documents) along with the previous owner's title.

Is there a sales tax on electric vehicles in Missouri?

Yes. Electric vehicles are taxed the same way as any other vehicle — at your local combined sales tax rate. Missouri does not offer a sales tax exemption or reduction for electric or hybrid vehicles at this time.