5 CFR §1690.11
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The Thrift Savings Plan's plan year is established on a calendar-year basis for all purposes, except where another applicable provision of law requires that a fiscal year or other basis be used. As used in this section, the term “calendar-year basis” means a twelve-month period beginning on January 1 and ending on December 31 of the same year.