How to Start a Mobile Mechanic Business in California
In California you must register with the Bureau of Automotive Repair as an Automotive Repair Dealer before charging for repairs, and mobile techs register the vehicle they work from. Your business name, ARD number and phone go on the vehicle and in every ad, and you follow BAR estimate and invoice rules on every job.
BAR first, then the rest
Business, BAR registration, tax, insurance, pricing, first quote. The checklist keeps the order straight.
See the setup checklistWhat California requires
Register with BAR as an Automotive Repair Dealer (ARD). Mobile repair is covered. Apply at bar.ca.gov.
One registration per vehicle you operate from. Add a second truck, add a second registration.
Display the business name, ARD number and phone number on the vehicle in large lettering, and include the ARD number in online ads and on your website.
Give the customer a paper notice with your ARD information with every work order.
Written estimate approved before work, itemized invoice after, and customer approval for any added work.
Also: register the business, get a seller's permit from CDTFA for parts, carry insurance, and check your city business license.
The estimate and invoice rules are the job
BAR is strict about estimates. The customer approves a written estimate before work, you do not exceed it without new approval, and the invoice itemizes parts and labor and shows which parts were new, used or rebuilt. Doing this from a phone with the approval time stamped is the easiest way to stay compliant.
Why California is still worth it
The rules keep a lot of under-the-table competition out. A registered mobile tech with clean paperwork looks like the safe choice to the customer, and fleets will only use registered shops. Smog is a separate license, so leave that to the stations unless you want to go through it.
Paperwork done? Now get the estimate, signature and payment handled.
Repair Rocket runs the front office from your phone so your first customer gets a real quote, not a text. Free to start, no card needed.
We're building a directory so customers can find you. Free forever.
We're building it area by area. As each area fills in, we promote the mechanics and shops in it on Google, local search and AI search like ChatGPT.
- Free forever. No card. No catch.
- Costs you 30 seconds.
- Not open to customers yet. Early profiles are in first.
Common questions
Do mobile mechanics need a BAR license in California?
Yes. Charging for repairs without an ARD registration is illegal in California, and that includes mobile work.
Do I register myself or my truck?
The business registers as an ARD, and for mobile repair each vehicle you work from is registered and must display your information.
What goes on my truck in California?
Business name, ARD number and telephone number, in large lettering BAR can read. The requirement is specific, so follow the BAR guidance exactly.
Can I do smog checks as a mobile mechanic?
No. Smog inspection is a separate station license with its own equipment requirements.
Related: how to start a mobile mechanic business, what to charge per hour, and free tools for mobile mechanics.