If an employee works unauthorized overtime, yes, the employer is obligated to pay for it.
California law requires that employers pay overtime, whether authorized or not.
The rate that is paid for overtime is at the rate of one and one-half times the employee’s regular rate of pay for all hours worked in excess of eight up to and including 12 hours in any workday, and for the first eight hours of work on the seventh consecutive day of work in a workweek, and double the employee’s regular rate of pay for all hours worked in excess of 12 in any workday and for all hours worked in excess of eight on the seventh consecutive day of work in a workweek.
David Payab, Esq. from The Law Offices of Payab & Associates can be reached @ (818) 918-5522 or by visiting http://payablaw.com/