You must register your car in California within 20 days of establishing residency, even if it's already registered elsewhere

When you move to California with a car registered in another state, you cannot straightforward keep that registration. California law requires you to register your vehicle with the California Department of Motor Vehicles (DMV) within 20 days of becoming a resident. This applies whether you own the car outright, are financing it, or are leasing it. The 20-day clock starts when you establish California residency — typically when you get a job, sign a lease, or move into a home.

You'll need to surrender your out-of-state registration and plates, then complete a California registration. The process involves paperwork, a smog check in most cases, and registration fees. Your out-of-state title will be exchanged for a California title. If you miss the 20-day window, you risk citations and penalties, and the DMV may not process your registration until you pay any late fees.

Key Takeaways

  • California requires registration within 20 days of establishing residency, and you cannot legally drive with only an out-of-state registration after that period.
  • You will need your out-of-state title, proof of California residency, proof of ownership, and a smog check certificate (unless your car is exempt).
  • Most vehicles require a smog inspection before registration; you can find a referee station or STAR station through the DMV website.
  • Registration fees depend on your vehicle's value and type, and you can estimate the cost using the DMV's fee calculator before you visit.
  • You can complete the registration in person at a DMV office, by mail, or through an authorized third-party service if you prefer not to go to the DMV yourself.

Documents you need to bring or submit

Gather these documents before you start the registration process. You will need your out-of-state title (the ownership document from your previous state), your California driver's license or ID (or proof of residency if you don't have one yet), and proof that you own the vehicle. Proof of ownership can be a bill of sale, a loan document, or a lease agreement — whatever shows your name and the vehicle details.

You will also need a smog check certificate for most vehicles. California requires a smog inspection before you can register, with some exceptions for very new cars, electric vehicles, and vehicles over 40 years old. The smog check must be done at a Bureau of Automotive Repair (BAR) referee station or a STAR station, and the certificate is valid for 30 days. If your car is financed or leased, bring the lender's or lessor's information as well — you may need their permission or signature on certain forms.

If you are registering the vehicle in someone else's name or as a business, bring documentation showing that relationship. Bring your proof of insurance too, though you should have this before you drive anyway.

Getting a smog check before registration

A smog check (also called a smog inspection or emissions test) is required for most vehicles registering in California for the first time. The test checks whether your vehicle meets California's emissions standards. You cannot register your car without this certificate unless it qualifies for an exemption.

Find a testing station by visiting the Bureau of Automotive Repair website or searching for "smog check near me" — look for either a BAR referee station or a STAR station. The test takes about 30 minutes and costs between $30 and $70 depending on the station and your vehicle type. Bring your out-of-state registration and proof of ownership. The station will give you a certificate valid for 30 days; you must use it to register before it expires.

Vehicles exempt from smog checks include electric vehicles, plug-in hybrids, vehicles manufactured in the current year or the two previous years, and vehicles over 40 years old. If your vehicle qualifies for an exemption, you can still register without the test, but you will need to declare the exemption on your registration form.

Completing the registration at the DMV

You have three main options: register in person at a DMV office, by mail, or through an authorized third-party service. In-person registration is usually the fastest. Go to your local DMV office with your documents, fill out Form REG 343 (process for Title or Registration), and submit everything. Bring your smog check certificate, out-of-state title, proof of residency, and proof of ownership. You will pay the registration fee at that time, and the DMV will issue you temporary registration while your permanent registration is processed.

Mail-in registration takes longer but works if you prefer not to visit an office. Complete Form REG 343, gather all required documents, and mail them to your local DMV office. Include a check or money order for the registration fee. Processing by mail typically takes 4 to 6 weeks. You can find the correct mailing address and specific instructions on the DMV website.

Third-party services — such as AAA, UPS stores, or private registration services — can handle the paperwork for you, though they charge an additional fee (usually $15 to $50). These services are convenient if you have limited time, but you still need to provide all the same documents and pay the registration fee to the DMV.

Registration fees and what affects the cost

California registration fees are based on your vehicle's value, not a flat rate. The DMV uses a formula that considers the vehicle's age, make, model, and market value. A new car will cost more to register than a 10-year-old car. Fees typically range from around $200 to $400 for most vehicles, but luxury or high-value vehicles can be significantly higher.

You can estimate your registration fee using the DMV's online fee calculator before you register. Enter your vehicle information, and it will show you an estimated cost. This estimate includes the base registration fee, county fees, and any applicable surcharges. If you are registering a vehicle with a lien (financed), there may be additional paperwork but no extra fee.

Some vehicles may have access to for reduced fees or exemptions. Electric vehicles and plug-in hybrids may have lower registration fees in some cases. If you are registering a vehicle for a disabled person, you may be able to get a disabled person placard or license plate, which has different fee rules. Ask the DMV about these options when you register.

What happens to your out-of-state registration and plates

Once you register your vehicle in California, your out-of-state registration becomes invalid. You should return your out-of-state plates to the DMV in your previous state according to that state's rules — some states require you to mail them back, while others allow you to surrender them at a DMV office. Check your previous state's DMV website for the return process.

California will issue you new California license plates. If you registered in person, you may receive temporary registration and plates when ready, with permanent plates arriving by mail within a few weeks. If you registered by mail, the DMV will mail your plates and permanent registration together.

Do not drive with your out-of-state plates after your California registration is active. Once you have California registration, you are required to display California plates. Driving with out-of-state plates after the 20-day residency window can result in a citation.

If you are financing or leasing the vehicle

If you are still paying off a loan or leasing the car, the registration process is slightly different. The lender or lessor has a financial interest in the vehicle, and California requires their information on the registration. You will need to provide the lender's or lessor's name, address, and account number.

The title will show the lender's or lessor's lien or lease interest. You cannot remove this until the loan is paid off or the lease ends. When you register, the DMV will send a copy of the registration to the lender or lessor as well. This does not delay your registration — it is just a notification to them that the vehicle is now registered in California.

If you are leasing, check your lease agreement for any restrictions on registering in a different state. Some leases require you to notify the lessor or may have specific rules about out-of-state registration. Contact your lessor before you register to confirm there are no issues.

Frequently Asked Questions

What if I don't have a California driver's license yet?

You can register your vehicle without a California driver's license, but you will need proof of California residency instead. Acceptable proof includes a utility bill, lease agreement, mortgage statement, or government mail with your California address. You should get a California driver's license or ID card within 10 days of establishing residency, so plan to do both around the same time.

Can I register my car before I have a California address?

No. You must have established California residency to register. Residency is typically established when you move into a home, sign a lease, or start a job in California. You cannot register an out-of-state vehicle using a temporary address or a friend's address unless you actually live there.

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

You can still register in California. Provide the lender's information when you register, and the lien will transfer to your California title. You cannot register the vehicle in your name alone if someone else holds the title — the registered owner and the title holder must match.

How long does California registration take?

In-person registration usually results in temporary registration on the spot, with permanent registration arriving by mail in 2 to 4 weeks. Mail-in registration takes 4 to 6 weeks. Third-party services take about the same time as in-person registration. If there are errors or missing documents, processing can take longer.

Do I need to register my car if I'm only visiting California temporarily?

No. If you are visiting for less than 20 days or are not establishing residency, you can drive with your out-of-state registration. However, if you move to California permanently or take a job there, the 20-day requirement applies even if you initially thought you were temporary.