What you need to do to register a car in Washington
Car registration in Washington is handled by your county auditor's office, not a state office. You will need to visit in person or mail documents to your local auditor to register a vehicle you own or have just bought. The process involves proving ownership, paying a fee based on the vehicle's age and value, and receiving license plates and a registration certificate.
Washington requires registration before you can legally drive on public roads. If you buy a used car from a private seller, you have 45 days to complete registration. If you buy from a dealer, the dealer usually handles the first registration as part of the sale. Either way, the auditor's office is where the process ends.
Key Takeaways
- Registration happens at your county auditor's office, and you can do it in person, by mail, or through some county online portals.
- You will need the vehicle's title, proof of ownership, a bill of sale if buying from a private seller, and proof of a Washington address.
- Registration fees are based on the vehicle's value and age, and you will also pay for license plates unless you are transferring existing plates.
- You have 45 days from purchase to register a vehicle bought from a private seller before you risk a fine.
- If the title is held by a lender, the lender's name will appear on the registration, and you cannot transfer it without their permission.
Documents you need to bring or mail
Start by gathering the vehicle's title — the legal document proving ownership. If you bought the car from a private seller, you also need a bill of sale signed by both you and the seller, showing the sale price and date. If you are buying from a dealer, they will provide the title and bill of sale.
You will also need proof of a Washington address. A utility bill, lease, mortgage statement, or government mail with your name and current address works. Bring your driver's license or state ID as well. If the vehicle has a lien (meaning a bank or lender holds the title), bring proof of insurance — Washington requires this before registration.
If you are registering a vehicle with an out-of-state title, bring the out-of-state title and any documents showing the vehicle passed an emissions test if required. Some counties require a vehicle safety inspection for older cars; ask your auditor's office whether yours does.
Registration fees and what they cover
Washington registration fees are based on the vehicle's value and age. A newer car costs more to register than an older one. The state uses a depreciation schedule to calculate value — a five-year-old sedan will cost less than a one-year-old sedan, even if they are the same model.
You will also pay separately for license plates if you do not already have Washington plates to transfer. Plates cost around $30 to $50 depending on the type (standard, personalized, or specialty). If you are transferring plates from another vehicle you own, you do not pay for new plates, but you still pay the registration fee.
Registration is valid for one year from the month you register. You will receive a renewal notice in the mail before expiration. Most people renew by mail or online rather than visiting the auditor's office again.
How to register in person at the auditor's office
Find your county auditor's office online by searching "[your county] auditor vehicle registration" or visiting your county's official website. Call ahead to confirm hours and whether you need an appointment — some offices require them during busy times.
Bring all documents listed above, your payment method (cash, check, or card — policies vary by county), and the vehicle keys if possible. The auditor's staff will verify your documents, calculate the fee, process the payment, and issue your license plates and registration certificate on the spot. The whole visit usually takes 30 to 45 minutes.
If you cannot visit in person, most counties allow you to mail documents to the auditor's office. Include a cover letter with your name, phone number, and the vehicle's VIN. Mail everything certified or with tracking so you know it arrived. Processing by mail takes one to two weeks longer than in-person registration.
Online registration options in some counties
A few Washington counties offer online registration renewal, but not all. King County (Seattle), Pierce County (Tacoma), and Snohomish County have online portals for renewals. However, initial registration of a newly purchased vehicle almost always requires an in-person visit or mailed documents because the auditor must verify the title.
Check your county auditor's website to see whether online renewal is available where you live. If it is, you can renew without visiting the office or mailing anything. If your county does not offer online renewal, mail or in-person registration is your only option.
What happens if you miss the 45-day important date
If you buy a car from a private seller and do not register it within 45 days, you can be stopped by police and cited for driving an unregistered vehicle. The fine starts at around $136 and can increase if you continue driving unregistered. You will also owe late fees when you finally register.
If you have missed the important date, register as soon as possible. Bring all the same documents to the auditor's office. The auditor will calculate the late fee based on how long you waited. It is better to register late than to keep driving unregistered and risk more citations.
Transferring ownership and plates to someone else
If you sell your car to someone else, you do not need to do anything at the auditor's office — the new owner handles registration. However, you should sign the back of the title and give it to the buyer. You can also notify the auditor in writing that you no longer own the vehicle, which stops you from receiving renewal notices and protects you if the new owner does not register it promptly.
If you want to transfer your current license plates to a different vehicle you own, you can do this at the auditor's office. Bring both vehicles' titles, proof of ownership, and your driver's license. The auditor will move the plates and update the registration. This costs less than buying new plates.
Frequently Asked Questions
Can I drive my new car home from the dealer before registration is complete?
If you buy from a licensed dealer, they usually issue a temporary permit that lets you drive for a few days while paperwork is processed. Ask the dealer for this permit before you leave the lot. If you buy from a private seller, you cannot legally drive the car until you register it, unless you have a dealer's temporary permit from a previous purchase.
What if the title has the wrong name or address on it?
Contact the previous owner or the auditor's office in the county where the title was issued. You may need a corrected title before you can register. If the title is from out of state, contact that state's motor vehicle department. This can take several weeks, so start early if you notice an error.
Do I need to register a vehicle if I only drive it on private property?
No. Registration is only required for vehicles driven on public roads. If you keep a car on your own property and never drive it on streets or highways, you do not need to register it. However, you still need a title to prove ownership.
What if I bought the car but the title is still in the seller's name?
The seller must sign the title and give it to you before you can register. If the seller refuses or has disappeared, you cannot legally register the vehicle. Contact a lawyer or your county auditor's office for options — some counties have a process for disputed titles, but it is slow and expensive.
Can I register a vehicle with a salvage or rebuilt title?
Yes, but the registration will show "salvage" or "rebuilt" status. You will also need proof that the vehicle passed a safety inspection after being repaired. Some insurance companies charge more for salvage vehicles, so check with your insurer before buying one.