Perquisite
/ˈpɜːkwɪzɪt/
noun
(chiefly in the plural) Any monetary or other incidental benefit beyond salary.
“The perquisites of this job include health insurance and a performance bonus.”
A gratuity.
“After the wonderful service that evening he didn’t hesitate in laying a substantial perquisite on the table.”
A privilege or possession held or claimed exclusively by a certain person, group or class.
“Private jets and motor yachts are a perquisite of the rich.”