California Mileage Reimbursement Law requires employers to reimburse employees for all vehicle expenses incurred on the job. Employers can require employees to use a personal vehicle for work.Under Section 2082 in California, employers have essential obligations to fulfill when employees use personal vehicles for work. The use of privately-owned automobiles for approved work is permissible provided it is done during the course of the employee's scheduled hours of work. It is lawful for your employer to make you use your own vehicle to drive to various locations for your job. If you agreed to drive around town to do jobs for work, then they should cover you while driving. This law states that employers should reimburse employees for each and every expense that they incur throughout the course of doing business. One of these expenses is using one's personal vehicle for businessrelated purposes. California law that stipulates mileage reimbursement. In California, employers are required to fully reimburse you when you use your personal vehicles for business purposes.