an incidental payment, benefit, privilege, or advantage over and above regular income, salary, or wages

Among the president's perquisites were free use of a company car and paid membership in a country club.

a gratuity or tip.

something demanded or due as a particular privilege

homage that was once the perquisite of royalty.

noun

advantage , bonus , dividend , extra , gratuity , gravy * , lagniappe , largess , perk * , plus , reward , tipnotes:a perquisite is a profit or benefit in addition to a salary or wages or a gratuity or tip for services performed , while a prerequisite is something that is required in advance , cumshaw , tip , appanage , prerogative , right , due , fee , gain , income , privilege , proceeds , profit