What you need to register a vehicle in Missouri

Missouri requires you to register any vehicle you own within 30 days of purchase or moving to the state. You'll register through your county assessor's office, not a state office — each county handles its own registrations. You'll need the vehicle's title (or a bill of sale if you don't have it yet), proof of ownership, a completed process form, and proof of your Missouri residency.

The process is straightforward if you have all documents ready. If you're buying from a dealer, they often handle the paperwork and send it to the assessor for you, though you still pay the registration fee. If you're buying privately or transferring an out-of-state registration, you'll go to the assessor's office yourself.

Key Takeaways

  • Register your vehicle at your county assessor's office within 30 days of purchase or moving to Missouri.
  • You need the vehicle title, proof of ownership, a completed Form 108 (process for Missouri Title and Registration), and proof of Missouri residency.
  • Registration fees vary by vehicle weight and type, and you'll also pay a one-time title fee when registering for the first time in Missouri.
  • Dealers often handle registration paperwork for you, but private sales require you to visit the assessor's office yourself.
  • Your registration is valid for one or two years depending on your vehicle type, and renewal notices are mailed to your address on file.

Documents you'll need at the assessor's office

Bring the vehicle's title or a bill of sale. If you're transferring ownership from another state, bring the out-of-state title. If you're buying from a private seller and the title hasn't been transferred yet, a bill of sale signed by the seller works temporarily — the assessor will issue you a temporary registration while the title is processed.

You'll also need proof of Missouri residency: a utility bill, lease agreement, mortgage statement, or government-issued ID with your current address. A driver's license counts if it shows your Missouri address. Bring your Social Security number or tax ID number. Complete Form 108 (process for Missouri Title and Registration) before you go, or fill it out at the office.

If someone else is listed on the title with you, both owners may need to be present, or the absent owner may need to sign a power of attorney. Check with your specific county assessor's office about their policy — requirements can vary slightly between counties.

Registration fees and what they cover

Missouri registration fees are based on your vehicle's weight. A passenger car typically costs between $150 and $250 for a two-year registration, though the exact amount depends on the vehicle's gross vehicle weight rating (GVWR). Trucks, SUVs, and commercial vehicles have different fee schedules. You can find the fee table on your county assessor's website or call them for a quote before you go.

When you register a vehicle in Missouri for the first time, you also pay a one-time title fee, usually around $10 to $15. If you're renewing an existing Missouri registration, you pay only the registration renewal fee — no title fee. Some counties accept cash, check, or card; others may have restrictions, so call ahead.

If your vehicle is financed, the lender's name will appear on the title. This doesn't change your registration process, but the lender has a legal interest in the vehicle until the loan is paid off. Once you pay off the loan, ask the lender to send you a release of lien, which you can then file with the assessor to remove their name from the title.

How long registration takes and when it expires

If you register in person at the assessor's office, you'll receive your registration card and plates (or a temporary registration) the same day. If you mail in your documents, processing typically takes one to two weeks. Dealers who handle registration for you usually submit paperwork within a few days of purchase, and you'll receive your plates by mail within two to three weeks.

Passenger vehicle registrations in Missouri are valid for two years from the date of issuance. Commercial vehicles and trailers may have different expiration periods — check your registration card for your specific expiration date. About 30 to 60 days before expiration, you'll receive a renewal notice by mail at the address on file with the assessor.

Renewing your Missouri registration

You can renew by mail, online, or in person at your county assessor's office. The renewal notice you receive includes instructions for each method. Online renewal is the fastest option if your county offers it — you can renew within days and print a temporary registration when ready. Mail renewal takes one to two weeks. In-person renewal is when ready if you bring payment and your renewal notice.

You don't need to bring your vehicle to renew. You'll pay the registration fee again (based on weight) but not the title fee. If your address has changed, update it when you renew, or contact the assessor separately to change it in their system.

Special situations: transfers, out-of-state moves, and salvage titles

If you're transferring a vehicle to someone else, both the buyer and seller typically need to sign the title. The buyer then takes the signed title to their county assessor to register it in their name. Some counties require the seller to notify the assessor of the sale as well. Check your county's specific process.

If you're moving to Missouri from another state, you have 30 days to register your vehicle. Bring your out-of-state title, proof of residency, and the completed Form 108. The assessor will issue you a Missouri title and registration. Your out-of-state plates remain valid until your Missouri registration expires, but you should switch to Missouri plates when you receive them.

If a vehicle has a salvage title (issued after an insurance company declares it a total loss), registration is possible but restricted. Salvage vehicles can be registered for limited use in Missouri, and some counties require an inspection. Contact your assessor about salvage title registration before you attempt to register one.

Finding your county assessor's office and hours

Each Missouri county has its own assessor's office. Search online for "[Your County] Missouri Assessor" or visit the Missouri State Auditor's website, which lists all county assessor contact information and office locations. Most offices are open Monday through Friday during standard business hours, though some offer extended hours one evening per week.

Call ahead if you have questions about documents or fees specific to your situation. Many assessor's offices now accept appointments, which can reduce wait times. Some counties also offer online services for renewal and address changes, so check your county's website before you visit.

Frequently Asked Questions

What happens if I don't register within 30 days?

Driving an unregistered vehicle is illegal in Missouri and can result in a traffic citation, fines, and potential vehicle impoundment. If you miss the 30-day window, register as soon as possible. The assessor won't penalize you for late registration, but law enforcement can stop you for driving unregistered.

Can I register a vehicle if I don't have a title yet?

Yes. If you're buying from a private seller and the title hasn't been transferred, a bill of sale signed by both parties works temporarily. The assessor will issue you a temporary registration while the title is processed. The seller should send the signed title to the assessor within a few days, or you can deliver it yourself.

Do I need to register a vehicle if I'm only visiting Missouri temporarily?

No. If you're visiting and your vehicle is registered in another state, you don't need to register it in Missouri as long as you're not establishing residency. Once you move to Missouri or intend to stay longer than a temporary visit, you have 30 days to register.

What if my vehicle is financed and the lender won't release the title?

The lender's name will remain on the title until the loan is paid off. This doesn't prevent you from registering the vehicle — you register it normally, and the lender's interest is noted on the title. Once you pay off the loan, the lender sends you a release of lien, which you file with the assessor to clear the title.

Can I register a vehicle online in Missouri?

Some counties offer online registration for renewals, but new registrations typically require an in-person visit or mail submission with original documents. Check your county assessor's website to see what services they offer online. Mail-in registration is an option if you can't visit in person — send your documents and payment to your county assessor's office.