Perquisite (noun)

1. A benefit or privilege that is in addition to one's salary or wages.
2. A right or privilege that is considered as an addition to one's salary or wages.

Origin:

From latin perquisitus "obtained by asking", from perquirere "to ask for".

Examples:

1. The company car was a perquisite of the job.
2. The perquisite of the job was the use of the company's vacation house.
3. The executives had many perquisites that the regular employees didn't have.
4. He considered the free gym membership a perquisite of the job.
5. The perquisite of the job was a flexible schedule.