Code of Federal Regulations Title 5. Administrative Personnel § 5.1600.22 Maximum employee contributions

(a) The maximum employee contribution will be limited only by the provisions of the Internal Revenue Code (26 U.S.C.).

(b) A participant may make traditional contributions and Roth contributions during the same year, but the combined total amount of the participant's tax-deferred employee contributions and Roth contributions cannot exceed the applicable Internal Revenue Code elective deferral limit for the year.

(c) A participant who has both a civilian and a uniformed services account can make employee contributions to both accounts, but the combined total amount of the participant's tax-deferred employee contributions and Roth contributions made to both accounts cannot exceed the Internal Revenue Code elective deferral limit for the year.