California Used Car Buyer's Paperwork Checklist
Use this checklist to prepare for buying a used vehicle from a private seller in California. Confirm the latest requirements with the California Department of Motor Vehicles (DMV) before completing your transaction.
Quick answer
When buying a used car privately in California, ensure the seller provides a valid smog certificate (required for most 1976+ vehicles over 4 years old) and a properly signed title with odometer disclosure completed. Submit the signed title and fees to a CA DMV office within 10 days of purchase. California use tax is collected by the DMV at registration.
Key facts
- State
- California
- Agency
- California Department of Motor Vehicles
- Process
- Buy a Used Car
- Notary required
- No
- Bill of sale
- Conditional
- Odometer disclosure
- Yes
- Filing deadline
- 10 days
- Last verified
- 2026-05-10
- Official source
- California Department of Motor Vehicles ↗
Key facts from official sources
Seller must provide a valid smog certificate for most vehicles 1976 and newer. Vehicles 4 years old or newer, diesel, and electric are exempt.
California DMV — Smog Information ↗California does not require notarization to buy a used car from a private seller.
California DMV — Transfer of Title ↗Buyer must submit title transfer application within 10 days of purchase.
California DMV — Transfer of Title ↗Quick reference
Notary required?
✗NoBill of sale?
◆ConditionalOdometer disclosure?
✓YesInspection required?
✓Yes⏱ Important Deadlines
- 10-day deadline: Buyer must submit title transfer application within 10 days of purchaseOfficial source ↗
Buyer Checklist
Items the buyer typically needs to prepare or provide.
Required Forms
Fees
Title transfer fee + registration fees + use tax
Use the DMV fee calculator. Use tax (state rate plus local) is collected by the DMV at registration.
Special requirements
California generally does not require notarization to buy a used car from a private seller.
Not required by law but strongly recommended as proof of purchase.
Seller must complete odometer disclosure on the title for vehicles under 10 years old.
Seller must provide a valid smog certificate for most vehicles 1976 and newer. Some exemptions apply (vehicles 4 years old or newer, diesel vehicles, and electric vehicles).
Step-by-step process
- 1Request a vehicle history report (CARFAX/NMVTIS) before purchase.
- 2Ensure seller provides a valid smog certificate (if required).
- 3Seller signs the back of the title and completes odometer disclosure.
- 4Obtain a bill of sale with VIN, price, date, and both parties' information.
- 5Submit the signed title, smog certificate, and fees to a CA DMV office within 10 days.
- 6Pay use tax and registration fees at the DMV.
Common mistakes to avoid
- ✗Missing the 10-day title transfer deadline — late penalty fees apply.
- ✗Accepting a title without a valid smog certificate when one is required.
- ✗Not verifying the seller's name matches the title.
- ✗Failing to check for outstanding liens before purchase.
Official links
Source verification
This page covers 4 researched claims about California buy a used car:
Directly cited from official sources
Inferred — confirm with agency before acting
Researched from California Department of Motor Vehicles (DMV). Requirements can change — always verify with the official agency before submitting documents.
Frequently asked questions
How long do I have to register after buying a used car?
Deadlines vary by state. In California, confirm the registration deadline with the California Department of Motor Vehicles (DMV) to avoid late fees.
What if the title has errors?
Do not accept a title with correction fluid or scratched-out information. Ask the seller to obtain a corrected title from the DMV before completing the sale.
Can I drive the car home before registering it?
Many states offer a short window or allow a temporary permit. Check your state agency for guidance.
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Last reviewed: 2026-05-10 · Reviewed by the Car Paperwork editorial team · Based on official California Department of Motor Vehicles (DMV) sources · Independent resource · Not legal advice