What you need to register a car in Arizona

To register a car in Arizona, you need to visit your county assessor's office or an authorized third-party registration service with proof of ownership, proof of identity, and proof of Arizona residency. The Arizona Department of Transportation (ADOT) does not handle registration directly — each of Arizona's 15 counties runs its own registration system through the assessor's office.

You will also need to pass an emissions test in most of Arizona (Maricopa, Pima, and Yavapai counties require it; the rest of the state does not). The test must be completed before you register, and the results go directly to the assessor's office. Registration fees vary by vehicle type and county, but typically range from around $50 to $200 for a standard passenger vehicle.

If you are registering a vehicle you just bought, bring the title or bill of sale. If you are renewing an existing registration, bring your current registration card. Either way, you will leave with an Arizona registration certificate and license plate (or a renewal sticker if you already have plates).

Key Takeaways

  • Registration happens at your county assessor's office, not through a state office — the county you live in determines where you go and what you pay.
  • You need proof of ownership (title or bill of sale), proof of identity (driver's license or passport), and proof of Arizona residency (utility bill, lease, or mortgage statement dated within 60 days).
  • Maricopa, Pima, and Yavapai counties require an emissions test before registration; the rest of Arizona does not.
  • Registration fees depend on your vehicle's type and county, so call your assessor's office to confirm the exact cost before you go.
  • You can register by mail or through an authorized third-party service if you cannot visit the assessor's office in person.

Documents you need to bring

Proof of ownership is your starting point. If you bought the car from a dealer, bring the title (also called the certificate of title). If you bought it from a private seller, bring the signed title or a bill of sale. If the title is out of state, bring that title along with any transfer documents. The assessor's office will not accept a registration card from another state as proof of ownership.

Proof of identity must be a government-issued photo ID. An Arizona driver's license or ID card works. A passport, military ID, or tribal ID also works. You cannot use a voter registration card or utility bill alone for identity.

Proof of residency must show your current Arizona address and be dated within 60 days of registration. A utility bill, lease agreement, mortgage statement, or property tax bill all work. If you just moved and do not have a recent document in your name, bring a lease or purchase agreement plus a utility bill in someone else's name at that address, along with a signed statement that you live there.

If someone else is registering the vehicle on your behalf, bring a signed power of attorney form. The assessor's office has a template, or you can use the Arizona Department of Transportation's form.

Emissions testing in Arizona counties that require it

Maricopa County (Phoenix area), Pima County (Tucson area), and Yavapai County (Prescott area) require an emissions test before you can register. The test checks whether your vehicle meets Arizona air quality standards. You must complete the test before you go to the assessor's office — the test facility sends the results electronically, and the assessor's office will not process registration without them.

You can take the test at any Arizona Department of Environmental Quality (ADEQ) certified emissions testing station. These are private businesses, not government offices. A search on the ADEQ website lists all certified stations in your county. The test costs between $20 and $30 and takes about 10 minutes. You do not need an appointment at most stations, but calling ahead can save you a wait.

New vehicles (current model year) are exempt from emissions testing for the first four years. Vehicles over 25 years old are also exempt. If your vehicle fails the test, you have 30 days to fix the problem and retest at no additional charge. If it fails again, you cannot register it until repairs are made.

Registration fees and what they cover

Arizona registration fees are based on your vehicle's type (passenger car, truck, motorcycle, RV) and its age. Passenger cars typically cost $50 to $150 per year depending on the county. Trucks and SUVs may cost more. Motorcycles usually cost $20 to $50. These are base fees; your county may add additional fees for services or county-specific programs.

When you register, you are also paying for a license plate (if it is your first registration) or a renewal sticker (if you already have plates). The plate stays with you as long as you own the vehicle in Arizona. If you move to another county within Arizona, you do not need new plates, but you do need to update your registration with the new county assessor's office.

Some counties offer vanity plates (custom letter and number combinations) for an additional fee, usually $25 to $50 more than standard registration. You can request a vanity plate when you register or renew.

Where to register and how long it takes

Your county assessor's office is the official place to register. You can find the office location, hours, and phone number by searching "[your county] assessor" online — for example, "Maricopa County Assessor" or "Pima County Assessor." Most offices are open Monday through Friday during business hours, and some offer limited Saturday hours.

If you cannot visit in person, you have two other options. You can mail your documents and payment to the assessor's office. Include a cover letter with your name, phone number, and what you are registering for. Mail typically takes one to two weeks to process, plus mail time. You can also use an authorized third-party registration service — these are private businesses (often title companies or auto service centers) that process registration on behalf of the assessor's office. They charge a convenience fee (usually $10 to $25) on top of the registration fee, but they are often faster and have longer hours than the assessor's office.

In-person registration usually takes 15 to 30 minutes if you have all your documents. If documents are missing or incomplete, the assessor's office will tell you what you need and may not complete the registration that day. Registration is valid for one year from the date you register, and your registration card will show the expiration date.

Registering a vehicle you just bought

If you bought the vehicle from a dealer, the dealer often handles the first registration for you as part of the sale. Ask the dealer whether they will register it or whether you need to do it yourself. If they register it, they will give you the registration card and temporary plates or a registration sticker. You should still verify that the registration was completed by checking your registration card before you leave the lot.

If you bought from a private seller, you must register it yourself within 10 days of purchase. Bring the signed title, bill of sale, and your proof of identity and residency to the assessor's office. If the title is in both the seller's and buyer's names, both parties must sign the back of the title before you register. If only the seller's name is on the title, ask the seller to sign the back and write "sold to [your name]" with the date.

Until you register, you cannot legally drive the vehicle on Arizona roads except to drive it directly to the assessor's office or to an emissions testing station. Some counties issue temporary registration permits that allow you to drive for a few days while you complete registration.

Renewing your registration

Arizona registration expires one year from the date you registered or renewed. About 30 days before expiration, the assessor's office mails a renewal notice to the address on your registration. The notice includes the renewal fee and instructions for renewing by mail, online (in some counties), or in person.

You can renew by mail by sending the renewal notice, payment, and proof of current residency (if you moved) to the assessor's office. You can renew in person at the assessor's office with your registration card and payment. Some counties allow online renewal through their assessor's website — check your county assessor's website to see if this option is available.

If you miss the expiration date, you can still renew, but you may owe a late fee. Driving with an expired registration is illegal and can result in a traffic citation. If your registration expires while you are out of state, you can renew by mail or online without penalty in most cases, but contact your assessor's office to confirm.

Frequently Asked Questions

Do I need to register my car in Arizona if I just moved here?

Yes. Arizona law requires you to register any vehicle you own within 10 days of establishing residency in the state. If you have an out-of-state registration, you must surrender it and register in Arizona. Bring your out-of-state title or registration, proof of identity, and proof of Arizona residency to your county assessor's office.

What if the title is in someone else's name?

If you bought the vehicle but the title is still in the seller's name, the seller must sign the back of the title and transfer it to you before you can register it. If the title is in multiple names and you are only one owner, contact your county assessor's office — they can tell you whether both owners must sign or whether one signature is enough.

Can I register a vehicle with an out-of-state title?

Yes. Bring the out-of-state title, your proof of identity, and proof of Arizona residency to the assessor's office. The assessor will process the title transfer and issue an Arizona title and registration. This usually takes one to two weeks.

What happens if my vehicle fails the emissions test?

You have 30 days to repair the vehicle and retest at no additional charge. Once it passes, take the passing test results to the assessor's office to complete registration. If it fails a second time, you cannot register until repairs are made and it passes.

Can I register online in Arizona?

Some counties allow online renewal for vehicles that are already registered in Arizona, but new registrations and out-of-state transfers must be done in person or by mail. Check your county assessor's website to see what services are available online in your area.