FAR Part 15 Contracting by Negotiation

Part Federal Acquisition Regulation

Part facts

Citation
FAR Part 15
Type
Part
Last amended
90 FR 41872 Effective Oct 1, 2025
Proposed changes
3
Text as of
FAC 2026-01
Official text
acquisition.gov

Text from acquisition.gov. Federal Register history from the Federal Register's records of the rules that amended this part.

Contents

  • 15.000 Scope of part
  • 15.001 Definitions
  • 15.002 Types of negotiated acquisition
  • Subpart 15.1 Source Selection Processes and Techniques
  • Subpart 15.2 Solicitation and Receipt of Proposals and Information
    • 15.200 Scope of subpart
    • 15.201 Exchanges with industry before receipt of proposals
    • 15.202 Advisory multi-step process
    • 15.203 Requests for proposals
    • 15.204 Contract format
    • 15.205 Issuing solicitations
    • 15.206 Amending the solicitation
    • 15.207 Handling proposals and information
    • 15.208 Submission, modification, revision, and withdrawal of proposals
    • 15.209 Solicitation provisions and contract clauses
    • 15.210 Forms
  • Subpart 15.3 Source Selection
    • 15.300 Scope of subpart
    • 15.301 Reserved
    • 15.302 Source selection objective
    • 15.303 Responsibilities
    • 15.304 Evaluation factors and significant subfactors
    • 15.305 Proposal evaluation
    • 15.306 Exchanges with offerors after receipt of proposals
    • 15.307 Proposal revisions
    • 15.308 Source selection decision
  • Subpart 15.4 Contract Pricing
    • 15.400 Scope of subpart
    • 15.401 Definitions
    • 15.402 Pricing policy
    • 15.403 Obtaining certified cost or pricing data
    • 15.404 Proposal analysis
    • 15.405 Price negotiation
    • 15.406 Documentation
    • 15.407 Special cost or pricing areas
    • 15.408 Solicitation provisions and contract clauses
  • Subpart 15.5 Preaward, Award, and Postaward Notifications, Protests, and Mistakes
    • 15.501 Definition
    • 15.502 Applicability
    • 15.503 Notifications to unsuccessful offerors
    • 15.504 Award to successful offeror
    • 15.505 Preaward debriefing of offerors
    • 15.506 Postaward debriefing of offerors
    • 15.507 Protests against award
    • 15.508 Discovery of mistakes
    • 15.509 Forms
  • Subpart 15.6 Unsolicited Proposals

Federal Register history

Final rule Published Effective
Federal Acquisition Regulation: Inflation Adjustment of Acquisition-Related Thresholds 90 FR 41872 · FAC 2025-06, FAR Case 2024-001
Federal Acquisition Regulation: Reverse Auction Guidance 89 FR 61327 · FAC 2024-06
Federal Acquisition Regulation: Sustainable Procurement 89 FR 30212 · FAC 2024-05
Federal Acquisition Regulation: Update to Title 10 Citations 87 FR 73894 · FAC 2023-01
Federal Acquisition Regulation: Policy on Joint Ventures 87 FR 58219 · FAC 2022-08
Federal Acquisition Regulation; Technical Amendments 87 FR 24843 · FAC 2022-06
Federal Acquisition Regulation: Revision of Definition of “Commercial Item”; Correction 86 FR 64407 · FAC 2022-01
Federal Acquisition Regulation: Revision of Definition of “Commercial Item” 86 FR 61017 · FAC 2022-01
Federal Acquisition Regulation: Lowest Price Technically Acceptable Source Selection Process 86 FR 3679 · FAC 2021-03
Federal Acquisition Regulation; Technical Amendments 86 FR 3687 · FAC 2021-03
Federal Acquisition Regulation: Removal of FAR Appendix 85 FR 67613 · FAC 2021-02
Federal Acquisition Regulation: Inflation Adjustment of Acquisition-Related Thresholds 85 FR 62485 · FAC 2021-01, FAR Case 2019-013, Docket No. FAR-2019-0013
Federal Acquisition Regulation: Modifications to Cost or Pricing Data Requirements 85 FR 40071 · FAC 2020-07
Federal Acquisition Regulation: Evaluation Factors for Multiple-Award Contracts 85 FR 40068 · FAC 2020-07
Federal Acquisition Regulation: Applicability of Inflation Adjustments of Acquisition-Related Thresholds 85 FR 27088 · FAC 2020-06 · Corrected May 18, 2020
Federal Acquisition Regulation; Set-Asides Under Multiple-Award Contracts 85 FR 11746 · FAC 2020-05
Federal Acquisition Regulation: Update to Contractor Performance Assessment Reporting System (CPARS) 84 FR 47865 · FAC 2019-06
Federal Acquisition Regulation: Exception From Certified Cost or Pricing Data Requirements-Adequate Price Competition 84 FR 27494 · FAC 2019-03
Federal Acquisition Regulation; Uniform Use of Line Items 82 FR 4709 · FAC 2005-95
Federal Acquisition Regulation; Consolidation and Bundling 81 FR 67763 · FAC 2005-91
Federal Acquisition Regulation; Small Business Subcontracting Improvements 81 FR 45833 · FAC 2005-89
Federal Acquisition Regulation; OMB Circular Citation Update 81 FR 45852 · FAC 2005-89
Federal Acquisition Regulation; Inflation Adjustment of Acquisition-Related Thresholds; Correction 80 FR 53753 · FAC 2005-83
Federal Acquisition Regulation; Inflation Adjustment of Acquisition-Related Thresholds 80 FR 38293 · FAC 2005-83
Federal Acquisition Regulation; Technical Amendments 80 FR 38312 · FAC 2005-83
Federal Acquisition Regulation; Review and Justification of Pass-Through Contracts 80 FR 26424 · FAC 2005-82
Federal Acquisition Regulation; Incorporating Section K in Contracts 79 FR 70341 · FAC 2005-78
Federal Acquisition Regulation; Federal Contracting Programs for Minority-Owned and Other Small Businesses 79 FR 61746 · FAC 2005-77
Federal Acquisition Regulation; Small Business Protests and Appeals 79 FR 43580 · FAC 2005-76
Federal Acquisition Regulation; Positive Law Codification of Title 41 79 FR 24192 · FAC 2005-73
Federal Acquisition Regulation; Documenting Contractor Performance 78 FR 46783 · FAC 2005-69
Federal Acquisition Regulation; Publicizing Contract Actions; Contracting by Negotiation 78 FR 41331 Not on record
Federal Acquisition Regulation; Price Analysis Techniques 78 FR 37690 · FAC 2005-67
Federal Acquisition Regulation; Technical Amendments 77 FR 56743 · FAC 2005-61
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Proposed changes

Proposed rule Published Comments
Federal Acquisition Regulation: Revolutionary FAR Overhaul Parts 8, 12, 13, 15, 38, 44, and 51 91 FR 59406 · FAR Case 2026-003, Docket No. FAR-2026-0003, Sequence No. 1 Closed Oct 19, 2026No final rule found
Federal Acquisition Regulation: Controlled Unclassified Information 90 FR 4278 · FAR Case 2017-016, Docket No. 2017-0016, Sequence No. 1 Closed Mar 17, 2025No final rule found
Federal Acquisition Regulation: Preventing Organizational Conflicts of Interest in Federal Acquisition 90 FR 4376 · FAR Case 2023-006, Docket No. FAR-2023-0006, Sequence No. 1 Closed Mar 17, 2025No final rule found

Quick answers

What is FAR Part 15?

FAR Part 15 is a part of the Federal Acquisition Regulation, titled "Contracting by Negotiation".

When was FAR Part 15 last changed?

The most recent final rule on record is "Federal Acquisition Regulation: Inflation Adjustment of Acquisition-Related Thresholds" (90 FR 41872), published Aug 27, 2025 and effective Oct 1, 2025.

Are changes to FAR Part 15 proposed?

3 proposed changes have no final rule yet.

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