At-Will Employment

In Illinois, most employees are considered to be “at will” employees. In an
“at-will” employment relationship, either party—the employer or the
employee—may end the employment relationship at any time. Thus, just as
an employee can typically quit his or her job on any given day, without
reason and without even giving notice, an employer may generally fire an
“at will employee” for any reason or, for no reason.

Read more: Wrongful Termination