Site Feedback

Title 5

Displaying title 5, up to date as of 10/07/2026. Title 5 was last amended 10/05/2026.
New Finding Aids are now available on eCFR.gov. The Parallel Table of Authorities, Subject Index, and Agency-prepared Indexes are now online! Learn more
eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

Learn more about the eCFR, its status, and the editorial process.

§ 550.121 Authorization of night pay differential.

(a) Except as provided by paragraph (b) of this section, nightwork is regularly scheduled work performed by an employee between the hours of 6 p.m. and 6 a.m. Subject to § 550.122, and except as otherwise provided in this subpart, an employee who performs nightwork is entitled to pay for that work at his or her rate of basic pay plus a night pay differential amounting to 10 percent of his or her rate of basic pay.

(b) The head of a department may designate a time after 6 p.m. and a time before 6 a.m. as the beginning and end, respectively, of nightwork for the purpose of paragraph (a) of this section, at a post outside the United States where the customary hours of business extend into the hours of nightwork provided by paragraph (a) of this section. Times so designated as the beginning or end of nightwork shall correspond reasonably with the end or beginning, respectively, of the customary hours of business in the locality.

(c) An employee is not entitled to night pay differential while engaged in training, except as provided in § 410.402 of this chapter.

[33 FR 12458, Sept. 4, 1968, as amended at 48 FR 3934, Jan. 28, 1983; 64 FR 69175, Dec. 10, 1999]