Under the ADEA, it is unlawful to discriminate against a person because of his or her age with respect to any term, condition, or privilege of employment, including hiring, firing, promotion, layoff, compensation, benefits, job assignments, and training. Harassing an older worker because of age is also prohibited.

It is also unlawful to retaliate against an individual for opposing employment practices that discriminate based on age or for filing an age discrimination charge, testifying, or participating in any way in an investigation, proceeding, or litigation under the ADEA.

The ADEA permits employers to favor older workers based on age even when doing so adversely affects a younger worker who is 40 or older.

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Last Reviewed: April 27, 2021