What you need to register a car in Missouri

Missouri registration happens through your county assessor's office, not a state DMV. You'll need your vehicle's title (the ownership document), proof of insurance, a completed Form 108 (process for Missouri Title and Registration), and a valid ID. If you're registering a vehicle you just bought, bring the bill of sale or dealer paperwork showing the purchase price.

The assessor's office uses the purchase price to calculate your registration fee. Missouri charges a one-time registration tax based on the vehicle's value, plus an annual registration fee. The tax is paid once when you first register; the annual fee renews each year on your birthday month. Bring a check or be prepared to pay by card, depending on your county's payment methods.

If your vehicle has a lien (the bank or lender still owns it), the title will show that. You can still register it, but the lienholder's name appears on your registration documents. Once you pay off the loan, ask the lender to send you a clear title, then update your registration at the assessor's office.

Key Takeaways

  • Register your vehicle at your county assessor's office with your title, proof of insurance, Form 108, and a valid ID.
  • Missouri charges a one-time registration tax based on your vehicle's purchase price, plus an annual renewal fee due each year in your birthday month.
  • Your registration documents will show any lienholder, and you can update them once the loan is paid off.
  • Registration plates stay with the vehicle in Missouri, so if you sell it, the new owner must register it in their name.
  • You can renew your registration by mail, online, or in person at the assessor's office, depending on your county.

How much registration costs and what affects the price

The registration tax is calculated on the vehicle's actual cash value at the time of registration. For a new car, this is usually the purchase price. For a used car, the assessor uses the sale price you report on your bill of sale. The tax rate is 4.75% of that value, paid once.

On top of the tax, you pay an annual registration fee. The base fee varies by vehicle type: passenger cars, trucks, motorcycles, and commercial vehicles have different rates. Your county may also add a local option tax, which means the total cost differs depending on where you live. Contact your county assessor's office for the exact fee schedule in your area.

If you register a vehicle partway through the year, you may pay a prorated fee for the remaining months until your birthday month. Once your birthday month arrives, you'll renew on that schedule every year after.

Registering a vehicle you just bought

You have 30 days from the purchase date to register your vehicle in Missouri. Bring the bill of sale or dealer paperwork, your title (if you already have it), proof of insurance, Form 108, and your ID to the assessor's office. If the title hasn't arrived yet from the previous owner or the dealership, ask the assessor what temporary documentation you can use—some counties issue a temporary registration while you wait.

If you bought the car from a private seller, make sure the title is signed and dated by the seller. If it's not, the assessor won't process it. The seller should also provide you with a bill of sale showing the purchase price; if they don't have one, you can create one together and both sign it. This document protects you and gives the assessor the value needed to calculate your tax.

If you bought from a dealership, they usually handle the paperwork and send it to the assessor on your behalf. Ask them for a receipt showing what they submitted and when. You'll still need to bring proof of insurance and your ID when you go to pick up your plates or complete the registration in person.

Renewing your registration each year

Your registration renews in your birthday month each year. Missouri sends a renewal notice to the address on file about 30 days before your renewal date. The notice includes the amount due and instructions for renewing by mail, online, or in person.

To renew by mail, fill out the renewal notice, include a check, and mail it to your county assessor's office. Processing usually takes one to two weeks. To renew online, visit your county assessor's website—not all counties offer this option, so check first. In-person renewal is fastest: bring your renewal notice, proof of insurance, and payment to the assessor's office and walk out with your new registration sticker the same day.

If you miss your renewal date, you can still renew late, but you may owe a penalty fee. Don't drive with an expired registration; Missouri law requires current plates. If your renewal notice doesn't arrive, contact your assessor's office directly—they can look up your account and send a duplicate notice or process your renewal over the phone.

What happens if you move or change your address

If you move to a different county in Missouri, you don't need to re-register your vehicle. Your registration stays valid until your next renewal date. However, you should update your address with the assessor's office so renewal notices reach you. Call or visit your current county assessor's office and provide your new address.

If you move out of Missouri, you'll need to register your vehicle in your new state. Contact that state's DMV or equivalent agency for their requirements. You can cancel your Missouri registration by notifying your assessor's office, though this isn't required if you're straightforward moving away.

Transferring registration when you sell your vehicle

When you sell your car in Missouri, the registration plates stay with the vehicle. The new owner must register it in their name at their county assessor's office. You don't need to do anything to "transfer" the registration—just sign the title over to the buyer and provide them with the bill of sale.

Once the new owner registers the vehicle, they'll receive new registration documents in their name. If you want to keep your plates for a new vehicle you're buying, you can request to transfer them at the assessor's office, though you'll still need to register the new vehicle separately.

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

If you're registering a vehicle with a rebuilt title (one that was declared a total loss and then repaired), Missouri requires an inspection before registration. Contact your county assessor's office for the list of approved inspection stations. The inspection verifies that the vehicle is safe and roadworthy. Once you pass, bring the inspection report and your rebuilt title to the assessor's office to complete registration.

If you're moving to Missouri from another state and bringing a vehicle with you, you'll need to register it in Missouri within 30 days. Bring your out-of-state title, proof of insurance, Form 108, and your ID. Missouri will issue you a new title and registration. Some states' titles are accepted as-is; others may require a Missouri title process first. Your assessor's office can tell you what your specific state requires.

If you're registering a vehicle you inherited, bring the title, a copy of the will or probate documents showing you as the new owner, proof of insurance, Form 108, and your ID. The assessor will issue a new title in your name.

Frequently Asked Questions

Can I register my vehicle online in Missouri?

Some counties offer online registration renewal, but not all. Check your county assessor's website to see if they have an online portal. New registrations and transfers typically require an in-person visit or mail submission with original documents.

What if I don't have proof of insurance when I register?

Missouri requires proof of insurance to register a vehicle. You must have a valid insurance policy in place. Bring your insurance card or a declaration page from your insurer showing your policy number and coverage dates.

How long does registration take if I mail in my renewal?

Mail-in renewals typically take one to two weeks to process. In-person renewal is same-day. If you're close to your renewal date, visiting the assessor's office in person is faster and safer.

Do I need to register my vehicle in the county where I live?

Yes, you register in the county where you live, not where you work or where you bought the vehicle. If you move to a different county, update your address with your current assessor's office; you don't need to re-register until your renewal date.

What if my registration plates are damaged or lost?

Contact your county assessor's office to request replacement plates. You'll pay a replacement fee and may need to provide proof that your plates were lost or damaged. Bring your registration documents and ID.