The Missouri auto sales tax is 4.225% at the state level, plus a local rate tied to your home address, and you pay it yourself at a license office within 30 days of buying the vehicle rather than at the dealership.1Missouri Department of Revenue. Buying a Vehicle The tax applies to new and used cars, trucks, trailers, and motorcycles, and it is calculated on the purchase price after trade-in and manufacturer rebate credits.
What Rate You Actually Pay
Every buyer pays the same 4.225% state rate. The variable piece is the local city and county tax, which attaches to your residential address rather than to the dealership location. Driving across the state to buy from a different dealer will not change what you owe. Combined rates in some Missouri jurisdictions push above 8%, so the number you should check before signing is the one for your own address.
The Department of Revenue runs an online calculator at sa.dor.mo.gov. You enter your street address, zip code, city, and county, and it returns a combined rate estimate.2Missouri Department of Revenue. Motor Vehicle, Trailer, ATV and Watercraft Tax Calculator Run it before you finalize a price so the final bill at the license office is not a surprise.
How the Taxable Price Is Figured
Trade-Ins
Missouri lets you subtract a trade-in from the purchase price before the tax is calculated. Buy a $30,000 car, trade in one worth $10,000, and you owe tax on $20,000.3Missouri Revisor of Statutes. Missouri Code 144.025 – Transactions Involving Trade-in or Rebate, How Computed
The trade does not have to happen on the day of sale. You get 180 days in either direction: you can sell your old vehicle up to 180 days before buying the replacement, or up to 180 days after. If you sell privately rather than at a dealer, bring the bill of sale from the old vehicle when you title the new one. A private-sale credit can reduce your tax on the new vehicle to zero but will not generate a refund if it exceeds the tax owed.3Missouri Revisor of Statutes. Missouri Code 144.025 – Transactions Involving Trade-in or Rebate, How Computed
Manufacturer Rebates
Rebates work the same way. A $3,000 manufacturer rebate on a $30,000 vehicle leaves you paying tax on $27,000. Missouri treats the rebate as a reduction in the purchase price rather than cash back after the sale.3Missouri Revisor of Statutes. Missouri Code 144.025 – Transactions Involving Trade-in or Rebate, How Computed
Private Party Purchases
Buying from a private seller does not change the rate. The taxable amount is still the sale price minus any trade-in or rebate credit. Form 1957, the bill of sale, requires both buyer and seller to sign under penalty of perjury that the price is accurate.4Missouri Department of Revenue. Bill of Sale or Even-Trade Bill of Sale Writing down a lower number than you actually paid creates legal exposure for both parties and does not reliably save tax, since the Department of Revenue can assess based on actual value.
The 30-Day Deadline and Late Penalties
You have 30 days from the purchase date to title the vehicle and pay the tax. On day 31, a $25 penalty kicks in. The penalty grows by another $25 for every additional 30 days, capping at $200.1Missouri Department of Revenue. Buying a Vehicle That is on top of the full tax amount, not instead of it. Buying late in the month is where people get caught, because inspections still have to be scheduled inside the window.
Payment and paperwork happen in person at a local license office. The office returns a validated receipt and a processed title application, and the state then issues the new title in your name.
What to Bring to the License Office
- Form 108, Application for Missouri Title and License, with the purchase price, trade-in value, and your residential address.
- Form 1957, the signed bill of sale.4Missouri Department of Revenue. Bill of Sale or Even-Trade Bill of Sale
- The vehicle title, properly assigned by the previous owner or dealership.
- A safety inspection certificate, valid 60 days from the inspection date, or 90 days if a Missouri dealer performed the inspection within 60 days before the sale.5Missouri Department of Revenue. Motor Vehicle – Additional Help Resources
- An emissions inspection if you live in St. Louis City, St. Louis County, St. Charles County, or Jefferson County, completed within 60 days before you apply.5Missouri Department of Revenue. Motor Vehicle – Additional Help Resources
- A personal property tax receipt from the prior year, or a statement of non-assessment from your county assessor.
Names and addresses on Form 108 must match the title exactly. Mismatches are a common reason people get turned away and have to come back.
Fees on Top of the Tax
Beyond sales tax, expect these flat fees when you title and register:1Missouri Department of Revenue. Buying a Vehicle
- Title fee: $8.50
- Title processing fee: $9.00
- Transfer fee: $2.00
- Registration processing fee: $9.00 for one year or $18.00 for two years
- Registration (license plate) fee, based on taxable horsepower or vehicle weight
Credit and debit card payments carry a convenience fee of 2.0% plus $0.25 per transaction. E-checks carry a $0.50 handling fee.6Missouri Department of Revenue. Payments and Payment Plan Agreements
Out-of-State Purchases and New Residents
Buying from a dealer in another state does not get you out of Missouri sales tax. When you title the vehicle here, you pay the 4.225% state rate plus your local rate on the net purchase price. If a trade-in was part of the deal, bring proof of it, such as a copy of the title assignment for the trade or a copy of the Secure Power of Attorney.1Missouri Department of Revenue. Buying a Vehicle
If you are moving to Missouri with a vehicle you already own, you have 30 days from becoming a resident to title it. If you owned and operated the car in another state for at least 90 days before titling it here, no sales tax is due. If you have owned it less than 90 days and the other state’s sales tax was lower than Missouri’s, you pay the difference.7Missouri Department of Revenue. Motor Vehicle Titling and Registration Keep your prior tax receipt as proof.
Gifts and Exemptions
A vehicle received as a gift is exempt from Missouri sales tax, as long as the donor already paid sales tax on it at some point. The exemption is not limited to family. The donor writes “GIFT” in the price field on the title assignment, and a gift statement signed by at least one donor, listing the year, make, and vehicle identification number, is submitted with the application.8Missouri Department of Revenue. Form 4298A – Sales Tax Exemptions for Motor Vehicles Writing up a nominal “sale” for $1 to avoid tax does not reliably work; the Department of Revenue can assess based on actual value.
If You Are Also the Seller
Sellers have their own 30-day clock. Missouri law requires the seller to submit a Notice of Sale, Form 5049, to the Motor Vehicle Bureau in Jefferson City within 30 days of the sale, signed by both seller and buyer. Until the buyer titles the car in their own name, the seller remains the last titled owner on record, which keeps parking tickets, toll violations, and liability pointed at the old address. Failing to file is an infraction, and if the failure is intentional, meant to help the buyer dodge titling, it becomes a Class C misdemeanor.9Missouri Department of Revenue. Notice of Sale or Transfer – Form 5049 Keep a copy.