5 CFR § 842.406 - Members of Congress and Congressional employees.
(a) The annuity of a congressional employee or Member who is first covered by FERS on or before December 31, 2012, and who has had at least 5 years of service as a congressional employee, Member, or any combination thereof totaling 5 years is—
(1) One and seven-tenths percent of average pay multiplied by the total number of years of service as a Member and/or congressional employee not exceeding 20 years; plus
(2) One percent of average pay multiplied by the years of service other than that of a Member and/or congressional employee.
(b) Except as provided in paragraph (c) of this section, the annuity of a congressional employee or Member who is first covered by FERS after December 31, 2012, or Member re-elected with less than 5 years of FERS service after December 31, 2012, and who has had at least 5 years of service as a congressional employee, Member, or any combination thereof totaling 5 years is 1 percent of average pay multiplied by total service.
(c) The annuity of a congressional employee or Member is 1.1 percent of average pay multiplied by total service, provided the congressional employee or Member—
(1) Has completed 20 years of service; and
(2) Is at least age 62 at the time of separation on which entitlement to an annuity is based.