Age discrimination occurs when an employer treats an employee or applicant who is age 40 or older unfavorably because of his or her age. For instance, it is illegal for an employer to terminate an older employee in order to retain younger employees who are paid less.
It is also unlawful for an employer to harass a person who is age 40 or older because of his or her age. Harassment can include, among other things, offensive remarks about a person’s age.
Harassment can come from just about anyone. The harasser can be the victim’s supervisor, a supervisor in another area, a co-worker, or someone who is not an employee of the employer, such as a client or customer.
Although the law doesn’t prohibit simple teasing, offhand comments, or isolated incidents that aren’t very serious, harassment is illegal when it is so frequent or severe that it creates a hostile or offensive work environment, or when it results in an adverse employment decision (such as the victim being fired or demoted).