A fringe benefit, also known as a PERQUISITE, is an additional benefit given to employees in addition to their regular salary or wages. BONUS, PERK, PLUS, and FRILL are all terms used to describe these benefits. A BONUS is a one-time payment given to an employee for a job well done, while a PERK is a benefit that is given on a regular basis. PLUS is another term used to describe a benefit that is given in addition to the employee's regular salary or wages. FRILL is a term used to describe a benefit that is not essential but adds to the overall job satisfaction of the employee.