The Plan will also calculate and send your Required Minimum Distribution after you turn age 70½, if your systematic withdrawals are less than required. Required Minimum Distribution (PDF) (PDF) – Learn what you need to do upon reaching age 72 and get the necessary paperwork to request a distribution.An RMD is simply the minimum amount that an employee must withdraw annually in retirement. The SECURE Act permits plan participants to take an in-service distribution at age 59½ for governmental 457(b) plans. These retirement plans can include: