Phone: (919) 814-4590. Internal Revenue Code Section 457 provides taxadvantaged treatment for certain nonqualified deferredcompensation plans.The 457(b) is a supplemental retirement plan that allows employees to set aside payroll-deducted contributions on a pre or after-tax basis. A 457(b) plan is a tax-deferred retirement savings plan. Funds are withdrawn from an employee's income without being taxed and are only taxed upon withdrawal. Deferred compensation refers to money received in one year for work performed in a previous year often many years earlier. This guidebook focuses on nonprofit corporations, which are the most common organizational form for.