Part 550 up to date from eCFR
as of Apr 28, 2025; last amended Feb 5, 2020.
Subpart I - Pay for Duty Involving Physical Hardship or Hazard
§ 550.901 Purpose.
This subpart prescribes the regulations required by sections 5545(d) and 5548(b) of title 5, United States Code, for the payment of differentials for duty involving unusual physical hardship or hazard to employees.
[56 FR 20344, May 3, 1991]
§ 550.902 Definitions.
In this subpart: Agency has the meaning given that term in 5 U.S.C. 5102(a)(1).
Duty involving physical hardship means duty that may not in itself be hazardous, but causes extreme physical discomfort or distress and is not adequately alleviated by protective or mechanical devices, such as duty involving exposure to extreme temperatures for a long period of time, arduous physical exertion, or exposure to fumes, dust, or noise that causes nausea, skin, eye, ear, or nose irritation.
Employee means an employee covered by the General Schedule (i.e., covered by chapter 51 and subchapter III of chapter 53 of title 5, United States Code).
Hazardous duty means duty performed under circumstances in which an accident could result in serious injury or death, such as duty performed on a high structure where protective facilities are not used or on an open structure where adverse conditions such as darkness, lightning, steady rain, or high wind velocity exist.
Hazard pay differential means additional pay for the performance of hazardous duty or duty involving physical hardship.
Head of an agency means the head of an agency or an official who has been delegated the authority to act for the head of the agency in the matter concerned.
[56 FR 20344, May 3, 1991, as amended at 59 FR 33416, June 29, 1994; 64 FR 69179, Dec. 10, 1999]
§ 550.903 Establishment of hazard pay differentials.
(a) A schedule of hazard pay differentials, the hazardous duties or duties involving physical hardship for which they are payable, and the period during which they are payable is set out as appendix A to this subpart and incorporated in and made a part of this section.
(b) Amendments to appendix A of this subpart may be made by OPM on its own motion or at the request of the head of an agency (or authorized designee). The head of an agency (or authorized designee) may recommend the rate of hazard pay differential to be established and must submit, with its request for an amendment, information about the hazardous duty or duty involving physical hardship showing—
(1) The nature of the duty;
(2) The degree to which the employee is exposed to hazard or physical hardship;
(3) The length of time during which the duty will continue to exist;
(4) The degree to which control may be exercised over the physical hardship or hazard; and
(5) The estimated annual cost to the agency if the request is approved.
[56 FR 20344, May 3, 1991, as amended at 64 FR 69179, Dec. 10, 1999]
§ 550.904 Authorization of hazard pay differential.
(a) An agency shall pay the hazard pay differential listed in appendix A of this subpart to an employee who is assigned to and performs any duty specified in appendix A of this subpart. However, hazard pay differential may not be paid to an employee when the hazardous duty or physical hardship has been taken into account in the classification of his or her position, without regard to whether the hazardous duty or physical hardship is grade controlling, unless payment of a differential has been approved under paragraph (b) of this section.
(b) The head of an agency may approve payment of a hazard pay differential when—
(1) The actual circumstances of the specific hazard or physical hardship have changed from that taken into account and described in the position description; and
(2) Using the knowledge, skills, and abilities that are described in the position description, the employee cannot control the hazard or physical hardship; thus, the risk is not reduced to a less than significant level.
(c) For the purpose of this section, the phrase “has been taken into account in the classification of his or her position” means that the duty constitutes an element considered in establishing the grade of the position—i.e., the knowledge, skills, and abilities required to perform that duty are considered in the classification of the position.
(d) The head of the agency shall maintain records on the use of the authority described in paragraph (b) of this section, including the specific hazardous duty or duty involving physical hardship; the authorized position description(s); the number of employees paid the differential; documentation of the conditions described in paragraph (b) of this section; and the annual cost to the agency.
(e) So that OPM can evaluate agencies' use of this authority and provide the Congress and others with information regarding its use, each agency shall maintain such other records and submit to OPM such other reports and data as OPM shall require.
[59 FR 33416, June 29, 1994]
§ 550.905 Payment of hazard pay differential.
(a) When an employee performs duty for which a hazard pay differential is authorized, the agency must pay the hazard pay differential for the hours in a pay status on the day (a calendar day or a 24-hour period, when designated by the agency) on which the duty is performed, except as provided in paragraph (b) of this section. Hours in a pay status for work performed during a continuous period extending over 2 days must be considered to have been performed on the day on which the work began, and the allowable differential must be charged to that day.
(b) Employees may not be paid a hazardous duty differential for hours for which they receive annual premium pay for regularly scheduled standby duty under § 550.141, annual premium pay for administratively uncontrollable overtime work under § 550.151, or availability pay for criminal investigators under § 550.181.
[64 FR 69180, Dec. 10, 1999]
§ 550.906 Termination of hazard pay differential.
An agency shall discontinue payment of hazard pay differential to an employee when—
(a) One or more of the conditions requisite for such payment ceases to exist;
(b) Safety precautions have reduced the element of hazard to a less than significant level of risk, consistent with generally accepted standards that may be applicable, such as those published by the Occupational Safety and Health Administration, Department of Labor; or
(c) Protective or mechanical devices have adequately alleviated physical discomfort or distress.
[56 FR 20345, May 3, 1991, as amended at 59 FR 33417, June 29, 1994]
§ 550.907 Relationship to additional pay payable under other statutes.
Hazard pay differential is in addition to any additional pay or allowances payable under other statutes. It shall not be considered part of the employee's rate of basic pay in computing additional pay or allowances payable under other statutes.
[56 FR 20345, May 3, 1991]
Appendix A to Subpart I of Part 550—Schedule of Pay Differentials Authorized for Hazardous Duty Under Subpart I
Appendix A-1 to Subpart I of Part 550—Windchill Chart