FAR 2.101: Definitions, Thresholds, and Commercial Items

FAR 2.101 is the master glossary of the Federal Acquisition Regulation, and its definitions control the meaning of every term in a federal solicitation or contract unless a specific clause defines the term differently. That makes the FAR 2.101 definitions the baseline vocabulary of federal contracting: who can bind the government, what counts as an “offer,” when a product is “commercial,” which dollar thresholds change the rules, and what qualifies as a conflict of interest. Using any of these words the way you’d use them in the commercial world, rather than the way FAR 2.101 defines them, can cost you a deadline, a payment, or an award.

Who Can Bind the Government

Federal procurement runs through a defined chain of authority. Getting the wrong person’s signature or instruction is one of the fastest ways to end up doing work you can’t get paid for.

Contracting Officer

The Contracting Officer is the only person authorized to enter into, administer, or terminate contracts on behalf of the government. Every CO receives written instructions from their appointing authority that spell out dollar limits and permitted actions, and that scope must be available to the public and to agency staff.¹

The practical rule for contractors: if someone who is not the CO tells you to add work, change a delivery date, or modify scope, that direction carries no contractual weight. The government is not obligated to pay for work directed by anyone without contracting authority, no matter how senior they are. Confirm the authority before you act on the instruction.

Contracting Officer’s Representative

A Contracting Officer’s Representative is an individual the CO designates in writing to handle specific technical or administrative functions.² The COR monitors performance, reviews deliverables, and serves as the day-to-day point of contact. What a COR cannot do is modify the contract, authorize additional work, or change terms. Their authority ends where the designation letter ends.

Head of the Agency and Head of the Contracting Activity

The Head of the Agency holds overall authority for the agency’s acquisition mission. The Head of the Contracting Activity is the official responsible for a specific contracting activity, an organizational element the agency head designates and delegates broad acquisition authority to.² Many FAR provisions that require elevated approval route through the HCA rather than the agency head, so the role appears often in waiver requests and source-selection decisions.

Offeror Versus Contractor

An Offeror is a party that submits a proposal or bid in response to a solicitation. Once the government accepts the offer and both sides execute a binding agreement, the offeror becomes a Contractor.² The distinction is not cosmetic. Certain representations and certifications bind you the moment you submit an offer; contract administration clauses only attach after award.

What Counts as a Commercial Purchase

How the government classifies what it’s buying determines which procurement rules apply, how much documentation is required, and which cost-accounting standards attach. The classification is one of the most consequential early decisions in an acquisition.

Commercial Product

A Commercial Product is an item other than real property, of a type customarily used by the general public or by non-governmental entities for non-governmental purposes, that has been sold or offered for sale to the public.³ The definition also covers items with minor modifications to meet government requirements, as long as the modifications don’t fundamentally change the product’s commercial character. When something qualifies, the procurement runs on streamlined procedures that reduce the regulatory load on both sides.

Commercially Available Off-the-Shelf Item

A Commercially Available Off-the-Shelf item is a narrower subset of commercial products. A COTS item must be sold in substantial quantities in the commercial marketplace and offered to the government without modification, in the exact same form it’s sold commercially. Bulk cargo such as agricultural and petroleum products is excluded.³ COTS status triggers additional regulatory relief beyond what standard commercial products receive, including exemptions from certain cost-accounting and reporting requirements. If you sell a product commercially and the government wants it as-is, confirming COTS status upfront can save substantial compliance effort.

Commercial Services and Nondevelopmental Items

Commercial Services include installation, maintenance, repair, and training that support a commercial product, along with services offered and sold competitively in the commercial marketplace under standard commercial terms. A Nondevelopmental Item is a product developed entirely at private expense that is already in use by a government (federal, state, local, or foreign). The NDI designation signals that the item is proven and available, distinguishing it from a requirement that would need custom development.²

Component

A Component is any item supplied to the government as part of an end item or as part of another component.² Simple on its face, the term has teeth in domestic-preference provisions like the Buy American Act. Several FAR clauses apply different domestic-content rules to components than to end items, and the component definition shifts depending on which clause governs. Check the specific clause reference for the applicable definition before making a compliance call.

Dollar Thresholds That Change the Rules

Dollar thresholds are the gatekeepers of federal procurement. They determine how much competition is required, how much documentation the agency has to produce, and what cost data the contractor has to disclose. The figures are adjusted periodically for inflation; the amounts below reflect the thresholds effective October 1, 2025.

Micro-Purchase Threshold

The standard micro-purchase threshold is $15,000. Purchases at or below that amount can be made with minimal documentation and without competitive quotes. During contingency operations and certain emergency responses, the threshold rises to $25,000 for purchases inside the United States and $40,000 for purchases outside the United States.⁴ One exception catches people off guard. For construction work subject to prevailing wage requirements, the micro-purchase threshold drops to $2,000, so even a small construction task order may need to follow more formal procedures.

Simplified Acquisition Threshold

The Simplified Acquisition Threshold is $350,000. Below it, agencies can use streamlined procedures that shorten paperwork and timelines for both sides.⁵ Above it, the agency generally has to follow the full set of formal contracting procedures, including broader competition requirements and detailed documentation. For acquisitions supporting contingency operations, disaster response, or defense against nuclear, biological, chemical, or radiological attack, the SAT increases to $1 million inside the United States and $2 million outside the United States.⁴

Certified Cost or Pricing Data

Certified cost or pricing data is detailed financial information a contractor certifies as accurate, complete, and current before award. The government requires this data on larger contracts so it can evaluate whether the proposed price is fair and reasonable. For contracts awarded on or after July 1, 2018, the threshold requiring certified cost or pricing data is $2.5 million. For contracts awarded before that date, the threshold is $950,000.⁴ This is one of the most consequential thresholds in federal contracting. Defective pricing data can result in price reductions and, in serious cases, False Claims Act liability. If your contract value is anywhere near the threshold, treat the certification as a serious legal representation.

Small Business Status

The federal government sets aside a significant share of contract dollars for small businesses, and FAR 2.101 defines the categories that determine eligibility. A small business concern must be independently owned and operated, not dominant in its field, and meet the size standards set by the Small Business Administration for its industry classification. SBA measures size by either average annual receipts or number of employees, depending on the industry.²

Beyond the general small business category, several specialized designations carry their own eligibility rules and set-aside preferences, including HUBZone small business concerns, which must be SBA-certified and meet requirements tied to employee residence in Historically Underutilized Business Zones.⁶ Misrepresenting small business status is a federal offense. The classification is a legal representation you make with every offer, not a preference checkbox.

Conflicts of Interest

FAR draws a sharp line between two types of conflicts that can disqualify a contractor or an individual from a procurement.

Personal Conflicts of Interest

A personal conflict of interest arises when a covered employee working on a government contract has a financial interest, personal activity, or relationship that could impair their ability to act impartially in the government’s best interest. Covered employees are individuals performing acquisition functions closely associated with inherently governmental duties.⁷ Sources of these conflicts include financial interests of the employee or close family, outside employment, and gifts or travel. A trivial financial interest that would not actually affect impartiality does not trigger the rule, but the bar for triviality is low.

Organizational Conflicts of Interest

An organizational conflict of interest exists when a company’s other activities or relationships give it an unfair competitive advantage or impair its objectivity on a government contract. FAR identifies three forms. Biased ground rules arise when a company helped develop the requirements or evaluation criteria for a contract it later competes for. Unequal access to information arises when a company gained non-public information through a prior government contract that would help it win a future one. Impaired objectivity arises when a company has financial or other incentives that could compromise the impartiality of advice it provides. Agencies have to identify and mitigate these conflicts before award, and contractors have an ongoing duty to disclose them.

Inherently Governmental Functions

Closely tied to conflict-of-interest rules is the concept of inherently governmental functions, activities that cannot legally be contracted out. These include directing military forces, conducting criminal investigations, determining agency policy, awarding contracts, and accepting or rejecting contractor deliverables.⁸ Contractors can support many of these activities, but the final decision-making authority must remain with a government employee. When a contractor employee’s role drifts too close to an inherently governmental function, both the personal conflict of interest rules and the prohibition on contracting out these functions come into play.

Small Terms With Big Consequences

A few definitions look minor until they cost you a deadline.

“Day” means a calendar day unless the specific FAR provision says otherwise.² A 30-day response window includes weekends and holidays. Contractors used to business-day counting in the commercial world sometimes learn this the hard way.

A “contract” is the mutually binding legal relationship obligating the seller to furnish supplies or services and the government to pay for them.² The definition covers everything from a simple purchase order to a multi-billion-dollar systems integration effort. The legal framework is the same regardless of size, which is why the thresholds above exist: to scale procedural requirements to the dollar value at stake.

1
Acquisition.GOV. FAR 1.602-1 Authority
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eCFR. 48 CFR 2.101 – Definitions
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Acquisition.GOV. FAR 2.101 Definitions
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Federal Register. Federal Acquisition Regulation: Inflation Adjustment of Acquisition-Related Thresholds
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Acquisition.GOV. Threshold Changes – October 1st, 2025
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eCFR. 13 CFR 126.103 – What Definitions Are Important in the HUBZone Program
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Acquisition.GOV. FAR Part 3 – Improper Business Practices and Personal Conflicts of Interest
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Acquisition.GOV. FAR Subpart 7.5 – Inherently Governmental Functions