5 C.F.R. § 530.202
In this subpart:
Agency means an executive agency as defined at 5 U.S.C. 105 .
Aggregate compensation means the total of-
(1) Basic pay received as an employee of the executive branch or as an employee outside the executive branch to whom the General Schedule applies;
(2) Premium pay under 5 U.S.C. chapter 53, subchapter IV;
(3) Premium pay under 5 U.S.C. chapter 55, subchapter V;
(4) Incentive awards and performance-based cash awards under 5 U.S.C. chapters 45 and 53;
(5) Recruitment and relocation incentives under 5 U.S.C. 5753 and retention incentives under 5 U.S.C. 5754 ;
(6) Extended assignment incentives under 5 U.S.C. 5757 ;
(7) Supervisory differentials under 5 U.S.C. 5755 ;
(8) Post differentials under 5 U.S.C. 5925 ;
(9) Danger pay allowances under 5 U.S.C. 5928 ;
(10) Post differentials based on environmental conditions for employees stationed in nonforeign areas under 5 U.S.C. 5941(a)(2) ;
(11) Physicians' comparability allowances under 5 U.S.C. 5948 ;
(12) Continuation of pay under 5 U.S.C. 8118 ;
(13) Lump-sum payments in excess of the aggregate limitation on pay as required by § 530.204 ; and
(14) Other similar payments authorized under title 5, United States Code, excluding-
(i) Overtime pay under the Fair Labor Standards Act of 1938, as amended, and 5 CFR part 551 ;
(ii) Severance pay under 5 U.S.C. 5595 ;
(iii) Lump-sum payments for accumulated and accrued annual leave upon separation under 5 U.S.C. 5551 or 5552 ;
(iv) Back pay awarded to an employee under 5 U.S.C. 5596 because of an unjustified personnel action;
(v) Student loan repayments under 5 U.S.C. 5379 ; and
(vi) Nonforeign area cost-of-living allowances under 5 U.S.C. 5941(a)(1) .
Aggregate limitation means the limitation on aggregate compensation received in any given calendar year as established by 5 U.S.C. 5307 . For an executive branch employee (including employees in Senior Executive Service positions paid under 5 U.S.C. 5383 and employees in senior-level or scientific or professional positions paid under 5 U.S.C. 5376 ), a General Schedule employee in the legislative branch, or General Schedule employee in the judicial branch (excluding those paid under 28 U.S.C. 332(f) , 603 , and 604 ), the limitation on aggregate compensation is equal to the rate for level I of the Executive Schedule in effect at the end of the applicable calendar year. For an employee in a Senior Executive Service position paid under 5 U.S.C. 5383 and an employee in a senior-level or scientific or professional position paid under 5 U.S.C. 5376 covered by an applicable performance appraisal system that has been certified under 5 CFR part 430 , subpart D, the limitation on aggregate compensation is equal to the total annual compensation payable to the Vice President under 3 U.S.C. 104 at the end of a calendar year.
Basic pay means the total amount of pay received at a rate fixed by law or administrative action for the position held by an employee, including any special rate under 5 CFR part 530 , subpart C, or any locality-based comparability payment under 5 CFR part 531 , subpart F, or other similar payment under other legal authority, before any deductions. Basic pay includes night and environmental differentials for prevailing rate employees under 5 U.S.C. 5343(f) and 5 CFR 532.511 . Basic pay excludes additional pay of any other kind.
Discretionary payment means a payment an agency has discretion to make to an employee. Payments that are authorized to be made to an employee under the terms of a service agreement or preauthorized to be made to an employee at a regular fixed rate each pay period are not discretionary payments.
Employee has the meaning given that term in 5 U.S.C. 2105 .
Estimated aggregate compensation means the agency's projection of the aggregate compensation an employee actually would receive during a calendar year but for application of the aggregate limitation to future payments. This projection must be based upon known factors. Estimated aggregate compensation includes-
(1) The total amount of basic pay the employee will receive during the calendar year;
(2) Any lump-sum payment of excess amounts from a previous calendar year, as described in § 530.204 ;
(3) The total amount of nondiscretionary payments the employee would be entitled to receive during the calendar year; and
(4) The total amount of discretionary payments the employee would be authorized to receive during the calendar year.
5 C.F.R. §530.202