It is lawful for your employer to make you use your own vehicle to drive to various locations for your job. 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. California Mileage Reimbursement Law requires employers to reimburse employees for all vehicle expenses incurred on the job. If your employees drive their personal vehicles for work, your business is at risk of financial liability in the case of an accident. We require employees driving company vehicles to give up to 30 minutes non Compensatory drive time before and after work. The Paid Leave and Paid Sick Leave ordinance mandates that all Chicago businesses provide paid leave and paid sick leave to employees. So the IRS figures are in my humble opinion useless, and dangerous for an employer to hang their hat on. Trying to cheat the system and driving the work vehicle for personal reasons can land you in legal trouble. Under California law, commuting time to and from work normally does not constitute "hours worked" and is not compensable.