What you need to register a car in Missouri

To register a car in Missouri, you'll visit your local county assessor's office or an authorized license office with proof of ownership, proof of residency, and payment for the registration fee. Missouri issues a registration certificate and a set of license plates — you keep the certificate in your vehicle and display the plates on the front and back. The whole process usually takes 30 minutes to an hour if you have all your documents ready.

Registration is separate from titling. If you're buying a used car from a private seller, you'll need to handle the title transfer first (which involves the seller signing the back of the title and you submitting it to the state), then register it. If you're buying from a dealer, they often handle the title work for you before you leave the lot, but you still need to register the vehicle yourself.

Key Takeaways

  • You must register your car at your county assessor's office or an authorized license office within 30 days of purchase or moving to Missouri.
  • Bring your proof of ownership (title or bill of sale), proof of Missouri residency (utility bill or lease), and a valid ID to complete registration.
  • Registration fees vary by vehicle weight and type, and you'll pay sales tax on the vehicle value if you haven't already paid it to a dealer.
  • Missouri issues two license plates (front and back) and a registration certificate that must stay in your vehicle.
  • If you buy from a private seller, the title must be signed over to you before you can register the vehicle.

Documents you'll need to bring

Gather these documents before you go to the assessor's office: the vehicle title (signed by the previous owner if it's a used car), a bill of sale if you bought from a private seller, your valid driver's license or state ID, and proof that you live in Missouri. Proof of residency can be a utility bill, lease agreement, mortgage statement, or bank statement dated within the last 60 days — it must show your name and current address.

If you're registering a vehicle you already own but haven't registered in Missouri before, bring the out-of-state registration or title. If the title is in someone else's name, bring a notarized bill of sale or power of attorney showing that person gave you permission to register it. If you're registering a vehicle owned by a business, bring the business registration documents and the person authorized to sign on behalf of the business.

Where to register and what it costs

You can register at your county assessor's office — there's one in each of Missouri's 114 counties. You can also use an authorized license office, which is often a private business (like a check-cashing service or tax preparation office) that the state has authorized to handle registration. Find your county assessor's office or nearby license offices on the Missouri Secretary of State website.

Registration fees depend on your vehicle's weight and type. A standard passenger car typically costs between $150 and $250 for the first year, though the exact amount varies. If you haven't paid sales tax on the vehicle yet, you'll owe that too — Missouri's state sales tax is 4.225%, plus any local sales tax your county charges (which ranges from 0% to 5.725% depending on location). If you bought from a dealer, they usually collected sales tax at the time of sale. If you bought from a private seller, you'll pay it when you register.

The registration timeline and renewal

You have 30 days from the date you purchase a vehicle or move to Missouri to register it. If you miss that important date, you can still register, but you may face a late fee. Once registered, your vehicle registration is valid for one year from the month you registered it. You'll receive a renewal notice in the mail about 30 days before your registration expires.

To renew, you can go back to the assessor's office or license office, mail in your renewal notice with payment, or renew online through the Missouri Secretary of State website if your vehicle has no liens and you haven't had any changes to ownership or address. Renewal usually costs less than initial registration because you don't pay sales tax again.

Special situations: Salvage titles, out-of-state vehicles, and transfers

If you're buying a vehicle with a salvage title (a car that was declared a total loss by an insurance company), you can still register it in Missouri, but the registration will note that it's a salvage vehicle. You'll need an inspection from a Missouri State Highway Patrol officer before you can register a salvage title vehicle — this inspection verifies that the vehicle is safe to drive. Schedule the inspection through your local patrol headquarters.

If you're moving to Missouri from another state and bringing a vehicle with you, you have 30 days to transfer your registration. Bring your out-of-state title or registration, proof of residency in Missouri, and your ID. If your out-of-state title is in someone else's name, you'll need a bill of sale or power of attorney.

If you're transferring a vehicle to someone else, sign the back of the title and give it to them along with the registration certificate. The new owner then takes both documents to the assessor's office to register it in their name. The title transfer itself doesn't cost anything — only the new registration does.

What happens if you register late or don't register

Driving an unregistered vehicle in Missouri is illegal. If you're stopped by police, you can be cited and fined. The fine for driving without current registration is typically $100 to $300, depending on whether it's your first offense. If you're in an accident and your vehicle isn't registered, your insurance may not cover the damage.

If you miss the 30-day important date, you can still register your vehicle — there's no permanent penalty. However, some counties charge a late fee if you register more than 30 days after purchase. Contact your county assessor's office to ask whether they charge a late fee and how much it is.

Frequently Asked Questions

Can I register a car if I still owe money on it?

Yes. If you have a loan on the vehicle, the lender's name will appear on the title as a lienholder, but you can still register it. Bring the title with the lender's name on it to the assessor's office. The registration will show both your name and the lender's name.

What if I lost my title?

Contact the Missouri Secretary of State's office to request a duplicate title. You'll need to fill out an process, provide proof of ownership (like a bill of sale or previous registration), and pay a fee (usually around $10 to $15). Once you receive the duplicate, you can register the vehicle. This process takes about two weeks by mail.

Do I need to register a vehicle if I'm only keeping it in Missouri for a few months?

If you're living in Missouri, yes — you must register any vehicle you own and drive there within 30 days. If you're just visiting and the vehicle is registered in another state, you don't need to register it in Missouri as long as you're not establishing residency.

Can I register online?

You can renew an existing Missouri registration online through the Secretary of State website, but you cannot complete an initial registration online. For your first registration in Missouri, you must visit a county assessor's office or authorized license office in person with your documents and payment.

What if the previous owner's name is still on the title?

The title must be signed over to you by the previous owner before you can register it. If you bought the vehicle and the seller hasn't signed the back of the title yet, contact them and ask them to sign it. If you can't reach them, you may need a notarized bill of sale or a court order to prove ownership — contact your county assessor's office for guidance on your specific situation.