The biggest hurdle is the Smog Check. Even if a car passed an emissions test in another state, it must pass a California-specific Smog Check at a licensed station before it can be registered.

The physical or electronic record from a CA smog station.

This is the primary form for bringing a vehicle into the CA system.

This form confirms the VIN and engine numbers. While some peace officers can sign this, it is usually easiest to have a DMV employee or a licensed vehicle verifier do it in person.

Expect to pay California use tax when you register the vehicle. This is equivalent to the sales tax in your city of residence.

If you drive the car back, you may need a temporary operating permit from the state of purchase. If you ship it, keep the bill of lading as proof of the date the car entered California. If you'd like to get started on the logistics or budgeting: Vehicle year and mileage (to check smog/new car rules) The state where the car is currently located Your California zip code (for tax calculation)

Required only if you are registering a truck or pickup. Taxes and Fees

California law requires you to register an out-of-state vehicle within 20 days of its arrival in the state. The "entry date" is when the car physically crosses the border, not when you purchased it. Missing this window leads to late fees that scale based on the vehicle's value. Emissions and the "50-State" Requirement