Buying a used car in California involves a few steps that don't exist in other states. Smog checks, use tax, and the DMV title transfer process all have specific rules and deadlines. Missing one can cost you money or create legal headaches. Here's how it works from start to finish.

Smog check requirements

Most used vehicles in California require a smog check before you can register them in your name. The general rule: any gasoline-powered vehicle from model year 1976 or newer that is more than 4 years old needs a biennial smog check.

Exempt from smog checks:

📱

Preparing for your DMV test?

Download our free iOS app — 1,164+ practice questions in 11 languages, flashcards, and offline study!

• Battery electric vehicles (no exhaust)
• Diesel vehicles manufactured before 1998
• Vehicles 8 model years old or newer (they get a temporary exemption on initial registration)
• Motorcycles
• Trailers

For a private party sale, the seller is typically responsible for providing a valid smog certificate dated within 90 days of the sale. If the car was sold "as is" and you agreed to handle the smog check yourself, that should be in writing. If the vehicle fails smog and you've already bought it, the cost of repairs is on you.

Before you buy any used car in California, ask for the most recent smog certificate. If the seller doesn't have one or it's older than 90 days, request that they get a new one before the sale closes: or factor the cost of a smog check ($30 to $80 for the test itself, more if the vehicle needs repairs to pass) into your offer.

The DMV title transfer process

When you buy a used car from a private seller in California, the title transfer must be completed with the DMV within 10 days of purchase. After 10 days, a late fee of $15 applies, and it keeps growing the longer you wait.

To transfer title, both buyer and seller must complete the back of the vehicle title (the pink slip). The seller signs and dates it, fills in the sale price and odometer reading, and hands it to the buyer. The buyer then submits it to the DMV along with:

• The completed title (pink slip)
• A completed Title or Registration Application (REG 343)
• Proof of insurance
• Payment for registration fees and use tax
• A valid smog certificate (if required)

Dealers handle all of this paperwork for you as part of the sale process. When buying from a private seller, it falls on you.

California use tax on private party vehicle sales

When you buy a vehicle from a private party in California (not a licensed dealer), you owe California use tax on the purchase price. The base rate is 7.25%, plus any local district tax in your county: typically an additional 0.5% to 2.5%. The total effective rate in most California counties runs between 7.75% and 10.25%.

Use tax is paid to the DMV at the time of registration. If you pay less than fair market value (for example, in a transaction between family members), the DMV may assess use tax based on the vehicle's market value rather than the stated price.

Dealer sales are handled differently: dealers collect and remit sales tax as part of the transaction, so you don't pay use tax separately. The rates are similar, just administered differently.

Registration fees

California vehicle registration fees vary based on the vehicle's purchase price (or market value) and the county. A typical used car purchase will involve:

• Registration fee: $65 to $100 depending on vehicle type
• Vehicle license fee (VLF): 0.65% of the vehicle's value
• County/district fees: varies
• Smog abatement fee (if applicable)

The DMV fee calculator at dmv.ca.gov gives you an estimate before you register. For a vehicle priced at $15,000, total registration costs typically run $300 to $500 in the first year.

What to inspect before buying

Before signing anything, get a vehicle history report. Carfax and AutoCheck both show accident history, title status, odometer readings from service records, and whether the car was ever declared a total loss. A salvage title or rebuilt title means the car was previously totaled by an insurance company. Some people buy these knowingly at a discount; just understand what you're getting.

Have an independent mechanic inspect any used car before you buy. A pre-purchase inspection at a shop costs $100 to $150 and can reveal problems the seller didn't disclose or doesn't know about. Ask about the condition of the brakes, tires, transmission fluid, coolant, and any pending codes from the OBD port.

Check for open recalls using the NHTSA recall database at nhtsa.gov. Enter the VIN and it will tell you if there are any safety recalls that haven't been addressed. Open recalls are typically fixed by dealers for free.

California lemon law: does it cover used cars?

California's lemon law (Song-Beverly Consumer Warranty Act) covers new vehicles and used vehicles that are still under the manufacturer's original warranty. If a defect covered by the warranty can't be fixed after a reasonable number of repair attempts, you may be entitled to a replacement or refund.

Used cars sold "as is" with no warranty are not covered. Used cars sold with a dealer warranty are covered for the warranty period. Certified pre-owned (CPO) vehicles typically include an extended warranty and receive the same protections.

California also has a 3-day right to cancel a vehicle purchase for contracts signed at a dealer location under certain conditions (vehicles priced under $40,000 purchased on credit). This is the CARS Act consumer protection. It doesn't apply to private party sales.

Private seller vs. dealer: pros and cons

Private party sellers typically offer lower prices because they're not running a business with overhead. But you get no dealer protections, no warranty (unless the manufacturer's warranty transfers), and you handle all the paperwork yourself.

Dealers are more expensive but handle the smog check, title transfer, and tax collection for you. CPO vehicles from dealers include inspections and extended warranties. For a first-time buyer unfamiliar with the DMV process, a dealer transaction is less likely to result in a missed deadline or a title problem.

Before you go to the DMV to register a newly purchased vehicle, review the traffic laws in California: especially rules around registration, proof of insurance, and what's required to drive legally. Our free California DMV practice tests cover vehicle registration requirements and other California Vehicle Code topics.

Common private party scams to watch for

Private party car sales have a higher scam risk than dealer transactions because there's no regulatory oversight and no recourse after you've signed and paid.

VIN cloning is one of the more serious schemes: the seller uses a legitimate VIN from a clean vehicle and attaches it to a car with a stolen or salvage history. Always verify the VIN physically on the dashboard plate, the door jamb, and the engine block, and confirm all three match the title. Run the VIN through the NHTSA recall database and a vehicle history service before you buy.

Odometer fraud is less common than it used to be (electronic odometers are harder to roll back) but still happens, particularly on older vehicles. If the interior wear seems inconsistent with the stated mileage: heavily worn pedals, seat bolster, and steering wheel on a car supposedly driven 30,000 miles: trust your instincts and walk away.

Curbstoners are unlicensed dealers who sell cars as private sellers to avoid dealer regulations. They often list multiple cars on the same online profile, use a personal address but show up at a neutral location for the sale, and push for quick cash transactions. Buying from a curbstoner means you have no dealer warranty protections and limited legal recourse if something goes wrong.

What to do if the title has a lien

A lien on a title means the previous owner borrowed money against the vehicle and a bank or lender is listed as a lienholder. Ideally, the seller pays off the lien before the sale, and the title is transferred to you clean. If the seller can't do this, the transaction gets complicated.

One safe approach: do the transaction at the lender's branch. The lender processes the payoff, releases the lien, and transfers the title on the spot. Alternatively, use an escrow service that holds the purchase funds until the title is clear, then releases payment to the seller.

Never pay cash to a private seller for a car with an active lien based on a promise that they'll pay it off later. If they don't, you own a car you can't legally register and you may face legal action from the original lender.

California EV incentives for used cars

California's Clean Vehicle Rebate Project (CVRP) has ended, but the federal Clean Vehicle Tax Credit now covers certain used electric vehicles. Under the Inflation Reduction Act, buyers of qualifying used EVs may claim a federal tax credit of up to $4,000 (30% of the sale price, up to that cap) on vehicles sold by a licensed dealer.

To qualify, the vehicle must be at least 2 model years old, cost $25,000 or less, and you must fall under income limits ($75,000 single, $150,000 joint). The credit applies at the dealer level as a point-of-sale discount on qualifying vehicles.

Private party EV purchases don't qualify for the federal used clean vehicle credit. If you're specifically looking for a used EV, a dealership transaction may be financially better than a private party sale once the credit is factored in.

What to do and avoid when buying a used car in California