When an employee is first hired, they are usually subject to a probationary period. This is a trial period in which the employer can assess whether or not the employee is a good fit for the company. Probationary periods typically last between three and six months, but can sometimes be shorter or longer depending on the company's policy. During this time, the employee may have their performance closely monitored and may be given feedback on how they can improve. At the end of the probationary period, the employer will decide whether or not to keep the employee on staff.