FAR Part 12 vs. FAR Part 15: Clauses, Pricing Data, and Audits

FAR Part 12 and FAR Part 15 answer different questions in a federal procurement, which is why comparing them as alternatives misses the point. Part 12 governs what the government is buying: commercial products and commercial services already sold in the private marketplace. Part 15 governs how the government runs a solicitation when it uses competitive negotiation rather than sealed bidding or a simplified procedure. A contracting officer buying commercial items through a negotiated process applies both parts at once, and where they conflict, Part 12 controls.¹

That relationship is the single most important thing to understand before drilling into specifics. FAR 12.102(b) directs contracting officers to use Part 12 policies “in conjunction with” the procedures in Part 13 (simplified acquisitions), Part 14 (sealed bidding), or Part 15 (contracting by negotiation). A large commercial services contract worth tens of millions of dollars can run through a full Part 15 competition while still stripping away many of the compliance requirements that normally attach to negotiated work. FAR 12.102(c) resolves conflicts in Part 12’s favor for commercial acquisitions.¹

What Part 12 Actually Covers

Part 12’s streamlined treatment only applies when the item being purchased meets the FAR’s definition of a commercial product or commercial service. Under FAR 2.101, a product qualifies if it is of a type customarily used by the general public or nongovernmental entities for non-governmental purposes, and it has been sold, leased, or licensed — or at least offered for sale — to the general public.² The definition also reaches products evolving through advances in technology that will be available in time to meet the government’s delivery schedule, and nondevelopmental items developed at private expense and sold in substantial quantities to state, local, or foreign governments on a competitive basis.

Products with minor modifications to meet government requirements still qualify, provided the modifications do not significantly alter the item’s commercial function or essential physical characteristics.² There is no bright-line dollar cutoff for what counts as minor. Before beginning an acquisition, agencies must conduct market research to determine whether commercial products or services can meet the need.³

Requirements that fall outside this definition — custom defense systems, specialized research, one-of-a-kind software platforms — proceed under Part 15 without any Part 12 overlay. These acquisitions carry the full weight of government-unique contract requirements because no commercial market exists to benchmark pricing or performance against.

What Part 15 Actually Covers

Part 15 sets out the machinery for competitive negotiation: how proposals are solicited and evaluated, how source selection decisions are documented, how the government exchanges information with offerors, and what unsuccessful offerors are entitled to know afterward. It applies whether the acquisition is commercial or not — the difference is how much of its heavier scaffolding actually gets used. When Part 15 procedures are laid on top of a Part 12 buy, contracting officers keep the parts that make sense (competitive evaluation, award decision) and drop the parts Part 12 displaces (certified cost data, cost analysis, extensive government-unique clauses).

Contract Types and Pricing

Part 12 sharply limits which contract types a contracting officer can use. FAR 12.207 requires firm-fixed-price contracts or fixed-price contracts with economic price adjustment for commercial products and services. Time-and-materials and labor-hour contracts are allowed for commercial services only when the contracting officer executes a written determination that no fixed-price approach will work, includes a ceiling price the contractor exceeds at its own risk, and awards competitively. Any contract type not authorized by Part 12 is prohibited for commercial acquisitions.⁴

Part 15 acquisitions carry no such restriction. Contracting officers can use cost-reimbursement, cost-plus-fixed-fee, cost-plus-incentive-fee, fixed-price-incentive, or time-and-materials arrangements depending on how much cost risk the government is willing to absorb. That flexibility is necessary for development programs where total costs cannot be reliably predicted at the outset. The tradeoff is heavier oversight: cost-reimbursement contracts require the contractor to open its books and submit to ongoing cost monitoring.

The pricing analysis follows the same split. Part 12 buys rely on price analysis, comparing the offered price to other competitive prices, historical prices, published catalog prices, or an independent government estimate, without dissecting the seller’s cost elements.⁵ Non-commercial Part 15 work often requires cost analysis of each element — direct labor, materials, overhead, G&A — and, on cost-reimbursement contracts, a cost realism analysis to determine what the government should realistically expect to pay.⁶

Certified Cost or Pricing Data

The biggest compliance divide between commercial and non-commercial work is whether the contractor must hand over its internal cost data. Under the Truthful Cost or Pricing Data statute (formerly the Truth in Negotiations Act), contractors on non-commercial negotiated contracts above a specified threshold must submit certified cost or pricing data — detailed breakdowns of labor rates, material costs, overhead, and other elements — and certify that the data is accurate, complete, and current as of the date of price agreement.⁷

The Department of Defense threshold is shifting in 2026. For DoD contracts entered into on or before June 30, 2026, the threshold is $2 million. For DoD prime contracts entered into after June 30, 2026, it rises to $10 million.⁸ For civilian agency contracts under 41 U.S.C. 3502, the threshold stays at $2 million for contracts entered into after June 30, 2018.⁹ Contractors who submit inaccurate data face price reductions, and deliberate misrepresentations can trigger False Claims Act investigations.

Commercial acquisitions under Part 12 are categorically exempt from certified cost or pricing data, regardless of dollar value. FAR 15.403-1(b)(3) lists the acquisition of a commercial product or commercial service as an express exception. The logic is that a functioning commercial market already sets price reasonableness; the government does not need to inspect anyone’s internal books. Outside the commercial context, certified data is also not required when there is adequate price competition, when prices are set by law or regulation, or when the head of the contracting activity grants a written waiver based on specific findings.¹⁰

Cost Accounting Standards and Audit Rights

Cost Accounting Standards impose detailed rules about how contractors measure, assign, and allocate costs to government contracts. They apply to negotiated non-commercial contracts and subcontracts above $7.5 million, or to any contractor whose business unit is already performing a CAS-covered contract at or above that threshold. Contracts for commercial items authorized under FAR 12.207 are exempt from CAS entirely.¹¹ For a commercial firm without a legacy government accounting system, that exemption is a meaningful incentive to sell to the government at all.

Audit rights follow the same pattern. Non-commercial Part 15 contracts typically include FAR 52.215-2, which gives the contracting officer and the Comptroller General the right to examine all records reflecting costs incurred or anticipated under the contract. When certified cost or pricing data were submitted, the audit right extends to all records supporting the proposal, the negotiations, and the pricing.¹² Commercial contracts use the streamlined clause at FAR 52.212-4, which does not impose those same government audit provisions.

Terms, Clauses, and Flow-Downs

Part 12 contracts use FAR 52.212-4 as their baseline: a single clause containing the core terms — payment, inspection, assignment, changes, disputes — in a form that reads more like a private-sector agreement than a traditional government contract.¹³ Additional statutory and executive-order clauses are folded in through FAR 52.212-5, which the contracting officer checks as applicable.¹⁴

Non-commercial Part 15 contracts carry a much larger volume of government-mandated clauses: government property management, earned value management, progress payment reporting, and detailed technical data and intellectual property rights provisions, among others. Each exists because the government is accepting more cost and performance risk on non-commercial work.

Flow-down obligations reflect the same asymmetry. Part 12’s mandatory flow-downs in FAR 52.212-5 cover a manageable list, including telecommunications security prohibitions, accelerated payments to small business subcontractors, and contractor ethics.¹⁴ Non-commercial Part 15 contracts add more. Large businesses holding non-commercial contracts above $900,000 (or $2 million for construction) must submit a formal small business subcontracting plan with dollar and percentage goals across small, disadvantaged, women-owned, service-disabled veteran-owned, and HUBZone categories, and report against it during performance. That obligation does not apply to Part 12 commercial contracts.

Source Selection, Evaluations, and Debriefings

Part 15 offers two formal source selection approaches. The tradeoff process lets the government accept a proposal that costs more than the lowest-priced offer when the technical benefits justify the additional cost, and the solicitation must state the relative importance of cost versus non-cost factors.¹⁵ Lowest price technically acceptable evaluates only whether proposals meet minimum standards and awards to the lowest-priced acceptable offer; tradeoffs are not permitted.¹⁶

For negotiated competitive acquisitions expected to exceed the simplified acquisition threshold (currently $350,000), the government must evaluate past performance unless the contracting officer documents why it is not an appropriate factor.¹⁷ Offerors with no relevant past performance history cannot be rated favorably or unfavorably on that factor.⁶ Commercial acquisitions under Part 12 tend to use streamlined evaluations focused on whether the product meets specification at a reasonable price. When Part 12 and Part 15 are used together, the formal competitive range and discussions process may still apply, but agencies have latitude to keep evaluations simpler for straightforward commercial items.

Unsuccessful offerors in Part 15 acquisitions have a statutory right to a post-award debriefing. A written request within three days of notice of award triggers the obligation, and the government should hold the debriefing within five days of the request. The debriefing must cover significant weaknesses or deficiencies in the offeror’s proposal, the overall evaluated cost or price and technical rating of both the winner and the debriefed offeror, the overall ranking of all offerors if one was developed, and a summary of the award rationale. For commercial acquisitions, the debriefing must also identify the make and model of the product the winner will deliver. It cannot include point-by-point comparisons with other offerors’ proposals, trade secrets, proprietary cost breakdowns, or the names of individuals who provided past performance references.¹⁸ Offerors who miss the three-day window lose the right, though agencies may still accommodate late requests.

Why the Difference Matters to Contractors

Choosing between a Part 12 commercial opportunity and a full Part 15 non-commercial contract shapes a company’s entire compliance infrastructure. CAS compliance, certified cost or pricing data support, government audit readiness, and small business subcontracting plan administration all require dedicated accounting systems and trained staff. A firm set up for commercial sales may find the overhead of Part 15 non-commercial work prohibitive. A traditional defense contractor already carrying that infrastructure may find Part 12 opportunities easy precisely because Part 12 removes the requirements it is already built to handle.

The government’s preference for Part 12 wherever it fits reflects a broader policy: accessing commercial innovation and pricing by imposing fewer unique requirements, so more companies compete. Part 15’s heavier framework exists because some requirements have no commercial equivalent, and the taxpayer’s exposure on a multi-year cost-reimbursement development program calls for oversight that would be excessive for buying laptops or cloud storage. The two parts work best when the procurement approach matches what is actually being bought.

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Acquisition.GOV. FAR 12.102 Applicability
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Acquisition.GOV. FAR 2.101 Definitions
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Acquisition.GOV. Part 12 – Acquisition of Commercial Products and Commercial Services
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Acquisition.GOV. FAR 12.207 Contract Type
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Acquisition.GOV. FAR 15.404-1 Proposal Analysis Techniques
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Acquisition.GOV. FAR 15.305 Proposal Evaluation
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Office of the Law Revision Counsel. 10 USC 3702 – Required Cost or Pricing Data and Certification
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Office of the Law Revision Counsel. 10 USC 3702 – Required Cost or Pricing Data and Certification
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Office of the Law Revision Counsel. 41 USC 3502 – Required Cost or Pricing Data and Certification
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Acquisition.GOV. FAR 15.403-1 Prohibition on Obtaining Certified Cost or Pricing Data
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eCFR. 48 CFR 9903.201-1 CAS Applicability
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Acquisition.GOV. FAR 52.215-2 Audit and Records-Negotiation
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Acquisition.GOV. FAR 52.212-4 Contract Terms and Conditions – Commercial Products and Commercial Services
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Acquisition.GOV. FAR 52.212-5 Contract Terms and Conditions Required To Implement Statutes or Executive Orders – Commercial Products and Commercial Services
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Acquisition.GOV. FAR 15.101-1 Tradeoff Process
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Acquisition.GOV. FAR 15.101-2 Lowest Price Technically Acceptable Source Selection
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Acquisition.GOV. FAR 15.304 Evaluation Factors and Significant Subfactors
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Acquisition.GOV. FAR 15.506 Postaward Debriefing of Offerors