how long should employment records be kept
EEOC Regulations require that employers keep all personnel or employment records for  one year. If an employee is involuntarily terminated, his/her personnel records must be retained for one year from the date of termination. Under ADEA recordkeeping requirements, employers must also keep all payroll records for three years. Additionally, employers must keep on file any employee benefit plan (such as pension and insurance plans) and any written seniority or merit system for the full period the plan or system is in effect and for at least one year after its termination.