In California, an employer must pay employees overtime for any hours worked over eight hours in a day or 40 hours in a week. That pay must be time and a half. When more than 12 hours are worked in a day, that time is double dime. For example, if an employee works for 13 hours at $10/hour, s/he must be paid $10/hour for the first eight hours, then $15/hour for the next four hours, then $20/hour for the last hour.