FAR 2.101 Definitions: The FAR Dictionary Contractors Use to Interpret RFPs, Clauses, and Thresholds (2026)

FAR 2.101 is the official Definitions section of the Federal Acquisition Regulation. Think of it as the FAR’s master dictionary: it standardizes the meaning of key procurement terms used across solicitations, contract clauses, and FAR parts. For proposal teams and contract administrators, FAR 2.101 is where you confirm what the Government means when an RFP uses terms like micro-purchase, simplified acquisition threshold, commercial product, commercial service, contract, offer, option, and dozens of other terms that impact eligibility, pricing assumptions, and compliance obligations.

Why FAR 2.101 matters in real federal contracting

Most bid and delivery mistakes are not caused by “bad intent.” They are caused by teams using commercial interpretations of words that the FAR defines differently. FAR 2.101 prevents that ambiguity by creating a single reference point for definitions that appear repeatedly throughout the FAR and in clause text. When a term is defined in FAR 2.101, you should treat it as the baseline meaning unless a specific FAR part, clause, or agency supplement provides a more specific definition for a particular context.

For contractors, FAR 2.101 typically affects:

• Bid strategy: whether an opportunity falls under micro-purchase, simplified acquisition, or a full negotiated procurement framework
• Compliance scope: which threshold-driven requirements trigger additional controls, documentation, and flowdowns
• Teaming and subcontracting: how threshold definitions change planning for set-asides, subcontracting requirements, and reporting
• Operational readiness: how your delivery team interprets “contracting officer direction,” “change,” “option,” and other contract administration terms

Key thresholds defined in FAR 2.101 that bid teams should memorize (2026 baseline)

FAR 2.101 includes several acquisition-related thresholds that determine which procedures apply and how fast a buyer can purchase.

High-impact examples (common in screening and opportunity qualification):

• Micro-purchase threshold (MPT): $15,000 (with important exceptions)
• MPT exceptions: $2,000 for certain construction subject to wage rate requirements; $2,500 for certain services subject to service contract labor standards; higher thresholds for certain emergency, disaster, contingency, and defense support scenarios
• Simplified acquisition threshold (SAT): $350,000 (with higher thresholds for specific contingency and defense-related scenarios)

These thresholds directly influence which FAR procedures are used, what competitive steps are expected, and how the opportunity is administered.

What kinds of definitions you will find in FAR 2.101

FAR 2.101 is not only about thresholds. It includes definitions that shape how the Government categorizes what it is buying and what it expects from contractors.

Common definition families that impact proposals and delivery:

• Procurement categories: commercial product, commercial service, COTS concepts, supplies, services
• Contract formation terms: offer, solicitation, contract, option, award, modification concepts
• Pricing and data concepts: pricing data language used across pricing and negotiation workflows
• Operational and administrative terms: terms that appear in clauses and affect performance expectations

How to use FAR 2.101 during an RFP review (copy-paste checklist)

• Extract every defined or high-stakes term used in the RFP that could change scope, threshold applicability, or compliance duties
• Confirm whether the term is defined in FAR 2.101 and align your interpretation across technical, pricing, and legal review
• Validate any threshold-driven assumptions using the current FAR values, especially for MPT and SAT
• Add a “Definition check” column to your clause matrix so clause triggers are tied to the correct FAR meaning
• Where your contract includes agency supplements or deviations, confirm whether any definition is refined for that environment and document the hierarchy your team will follow
• Store a one-page “Definitions used in this bid” note in the opportunity folder so proposal, contracts, finance, and delivery are working from the same playbook

Common mistakes FAR 2.101 prevents

• Using outdated micro-purchase or simplified acquisition thresholds in pipeline screening
• Treating commercial terminology as identical to FAR terminology, especially in commercial product and commercial service classification decisions
• Missing exception thresholds that change how a purchase must be executed for construction, labor-covered services, or emergency work
• Assuming a clause title explains the requirement without checking the defined terms that drive its scope

Last verified: February 2026

Sources

https://www.acquisition.gov/far/2.101 (acquisition.gov) https://www.acquisition.gov/threshold-changes (acquisition.gov) https://www.ecfr.gov/current/title-48/chapter-1/subchapter-A/part-2/subpart-2.1/section-2.101 (eCFR) https://www.federalregister.gov/documents/2025/08/27/2025-16412/federal-acquisition-regulation-inflation-adjustment-of-acquisition-related-thresholds (federalregister.gov)