FAR and DFARS › FAR Part 31: Contract Cost Principles and Procedures
FAR 31.000 Scope of part.
The codified text (eCFR, as of 2026-10-02). Under the Revolutionary FAR Overhaul ↗, agencies follow class deviations with new text for many parts while the formal rules go through the Federal Register: check the solicitation and your contract's clauses, which rule.
In plain English
This part of the FAR sets out the cost principles and procedures used for pricing contracts, subcontracts, and modifications when cost analysis is performed, and for determining, negotiating, or allowing costs when a contract clause requires it. It matters to contractors because it tells you which rules govern how costs are treated in those situations.
Applies to: Contractors and subcontractors involved in pricing or cost determinations under FAR Part 31
Key terms: cost principles · cost analysis · pricing of contracts · determination, negotiation, or allowance of costs · contract clause
Written by AI from this section's text. A guide, not legal advice: the text below rules.
The text
This part contains cost principles and procedures for (a) the pricing of contracts, subcontracts, and modifications to contracts and subcontracts whenever cost analysis is performed (see 15.404-1(c)) and (b) the determination, negotiation, or allowance of costs when required by a contract clause.
Sections it refers to
- 15.404-1 Proposal analysis techniques.
Sections that refer to it
- 31.201-7 Construction and architect-engineer contracts.
Rule changes for FAR Part 31
- Federal Acquisition Regulation; Technical Amendments ↗ · final rule 2024-04-22 · effective 2024-05-22
Source: eCFR, 48 CFR chapters 1 and 2 (GPO GovInfo bulk data) ↗. Plain words for the terms: glossary.