Under federal and state law, overtime pay must equal at least one and onehalf times an employee's regular rate of pay. Overtime must be paid after 40 hour of work per week at time and one-half the regular rate.In general, employees in Illinois may be entitled to overtime pay for any work they perform beyond 40 hours a week. Generally, employees are eligible for overtime pay if they work more than 40 hours a week. In the case of overtime hours, you should be paid the overtime rate. In Illinois, employees must be paid overtime if they go beyond a 40-hour work week. This overtime pay can be very beneficial to employees. We at Stephan Zouras are nationally-recognized leaders in recovering unpaid minimum and overtime wages under federal and state law. Exempt employee is one who's entitled to a minimum wage and overtime pay. Workers in Chicago have rights related to their work schedule.