How to Register an Out-of-State Car in California

You need a California title and registration within 20 days of moving to the state

When you move to California with a car registered in another state, you have 20 days from the date you establish residency to register it with the California Department of Motor Vehicles (DMV). This is not optional — driving on an out-of-state registration after that window closes can result in a citation and fines. The process requires your out-of-state title, proof of California residency, and a smog check in most cases.

The fastest path is to handle this in person at a DMV office or through an authorized vehicle registration service, because the DMV can issue a temporary registration document on the spot if your paperwork is complete. By mail takes longer and creates a gap where you are technically driving without valid California registration.

Key Takeaways

You have 20 days from establishing California residency to register your out-of-state vehicle, and driving past that important date without registering can result in citations.
A smog check is required for most vehicles unless your car is brand new, a classic vehicle, or meets specific exemptions — check the DMV website for your vehicle year and type.
You will need your out-of-state title, proof of California residency (utility bill, lease, or mortgage statement), and a valid ID to complete registration.
In-person registration at a DMV office or authorized service takes one visit if your paperwork is complete; mail-in registration takes two to three weeks.
Your out-of-state registration remains valid until it expires, but you cannot renew it in California — you must switch to California registration before the important date.

Documents you need to bring or submit

Start by gathering your out-of-state title — the physical document showing you own the vehicle. If the title is held by a lender, you will need a letter from them authorizing the transfer, or they may send it directly to the California DMV. Some states issue electronic titles; contact your previous state's DMV to confirm whether you need a paper copy sent to you first.

Next, collect proof of California residency. The DMV accepts a utility bill, lease agreement, mortgage statement, property tax bill, or government-issued mail with your current California address. The document must be dated within the last 60 days. A driver's license or ID card showing your new address also counts, but you will still need one additional document if you do not yet have a California ID.

Bring a valid photo ID — your out-of-state driver's license is fine for this step. You will also need proof of vehicle identification: your out-of-state registration, the vehicle's VIN (visible on the dashboard or title), and odometer reading. If you are registering a vehicle with a lien, bring documentation showing the lienholder's name and address.

The smog check requirement and exemptions

California requires a smog check (also called an emissions test) for most vehicles before registration. The test costs between $30 and $70 depending on your vehicle type and the testing station. You cannot register your car without a passing smog check certificate unless your vehicle is exempt.

Vehicles exempt from smog checks include: new cars (current model year and two years prior), vehicles over 1975 that have never been registered in California, electric vehicles, and some classic or collector vehicles. Diesel vehicles, motorcycles, and vehicles registered as non-commercial have different rules — check the California DMV website or call 1-800-777-0133 to confirm your vehicle's status before paying for a test.

Schedule your smog check at a STAR (Smog Check Test and Repair) station before you go to the DMV. Bring your out-of-state registration and VIN. The station will give you a certificate (usually printed on the spot) that you present to the DMV as proof of passing. If your vehicle fails, you have 30 days to repair it and retest at no charge at the same station.

Registering in person at a DMV office

Find your nearest DMV office on the California DMV website and check the current wait times — many offices now show estimated wait times online. Bring all documents listed above plus your smog check certificate. Fill out Form REG 343 (process for Title or Registration) before you arrive, or the DMV can provide one at the office.

At the counter, the DMV staff will verify your documents, calculate your registration fee (based on your vehicle's value and weight), and process your process. If everything is in order, you will receive a temporary registration document valid for 90 days while your permanent registration is mailed to you. The permanent registration usually arrives within two to three weeks.

Registration fees vary by vehicle type and value. The DMV website has a fee calculator where you enter your vehicle information to see the exact cost before you arrive. Bring a check, debit card, or cash — most offices accept all three.

Registering by mail or through an authorized service

If you cannot visit a DMV office, you can mail your documents to the DMV address listed on Form REG 343. Include your completed form, all required documents, your smog check certificate, and a check or money order for the registration fee. Mail it to the DMV office serving your county.

Processing by mail takes two to three weeks from the date the DMV receives your package. You will not receive a temporary registration, so you are driving without valid California registration during this period — this is why in-person registration is faster and safer. The DMV will mail your permanent registration and new license plates once approved.

Alternatively, you can use an authorized vehicle registration service (sometimes called a DMV service or registration service). These are private businesses licensed by the DMV to handle registration transactions. They charge a service fee on top of the DMV registration fee (typically $50 to $150), but they handle the paperwork and often have shorter wait times than DMV offices. Search "DMV registration service near me" to find one in your area.

What happens to your out-of-state registration

Your out-of-state registration remains valid until its expiration date. You do not need to cancel it with your previous state — once you register in California, your out-of-state registration is no longer in effect. If you move back to that state later, you will need to re-register there.

Do not attempt to renew your out-of-state registration in California. The DMV will reject any renewal process for a vehicle with an out-of-state title. Your only option is to complete the California registration process described above.

Timeline and what to expect after registration

If you register in person with complete paperwork and a passing smog check, you leave the DMV with a temporary registration valid for 90 days. Your permanent registration and new California license plates arrive by mail within two to three weeks. During those three weeks, the temporary registration is your proof of registration if stopped by law enforcement.

If you register by mail, expect the entire process to take three to four weeks from the date you mail your documents. The DMV will mail your permanent registration and plates once approved. If you do not receive them within four weeks, contact the DMV to confirm they received your process.

Once your permanent registration arrives, keep it in your vehicle along with your proof of insurance. Your out-of-state license plates can be removed and disposed of, or you can keep them as a souvenir — there is no requirement to return them to California.

Frequently Asked Questions

Can I drive my car on out-of-state plates while waiting for California registration?

For the first 20 days after you establish residency, yes. After that, you are driving without valid registration. If you register in person, you receive a temporary registration document that is valid for 90 days. If you register by mail, you are technically unregistered until the DMV processes your process — this is why in-person registration is safer.

What if my out-of-state title has a lien on it?

Contact your lender and ask them to send the title directly to the California DMV, or request a letter authorizing the transfer. Bring that letter with you when you register. The DMV will not issue a California title until the lien is satisfied or transferred to a California lienholder.

Do I need a new California driver's license when I register my car?

No — vehicle registration and a driver's license are separate. You can register your car with an out-of-state driver's license. However, California law requires you to obtain a California driver's license within 10 days of establishing residency, so you will likely need one soon anyway.

What if my vehicle fails the smog check?

You have 30 days to repair the vehicle and retest at the same STAR station at no charge. Once it passes, take the new certificate to the DMV to complete registration. Your 20-day registration important date is not extended, so prioritize repairs quickly if you are close to that date.

Can I register a vehicle I just bought from another state?

Yes, the process is the same. You will need the out-of-state title transferred to your name (or a bill of sale if the title has not been transferred yet), proof of California residency, and a smog check. Contact the DMV if the title is still in the seller's name — they can advise whether you need the seller's signature or a notarized bill of sale.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.