A deferred compensation agreement is an agreement between a company and an employee that withholds paying some of the employee's salary. Q: How do I enroll in the 457(b) Plan?A: In order to complete your enrollment in the 457(b) Plan, you must complete the applicable enrollment form. Deferred compensation refers to money received in one year for work performed in a previous year often many years earlier. A deferred compensation plan is another name for a 457(b) retirement plan, or "457 plan" for short.