This plan allows employee voluntary contributions only. Deferred compensation refers to money received in one year for work performed in a previous year often many years earlier.This plan allows eligible employees to: Set aside money towards their retirement. Make Roth contributions that can grow tax-free. Utah Retirement Systems. 457Plan. We'll explain the major state personal income tax considerations that apply to deferred compensation or retirement income. Complete the Military Retirement Credit Worksheet. • Located in the TC-40 Instructions. A non qualified deferred compensation plan is a strategy companies use to provide additional supplemental benefits to their key people.