Keep in mind that you cannot use both the 457(b) 3-Year Special Catch-Up election and the Age 50+ Catch-Up election during the same year. If you are a participant in a 457(b) plan sponsored by a tax-exempt, non-governmental employer, you are not eligible for the Age 50+ Catch-Up election. You may only elect the Special Catch-Up during the three consecutive years prior to — but not including — the year you reach your Plan’s normal retirement age.