Employee benefit or incentive. Short for perquisite.
Short for perquisite. Non-cash rewards that recognize exceptional performance or commitment to the company, its goals, and its values. Examples of perks include tickets to sports and cultural events, extra time off, dinners, and awards ceremonies.
an incidental benefit awarded for certain types of employment (especially if it is regarded as a right); "a limousine is one of the fringe benefits of the job"
a benefit on top of salary