Proposed FAR Rule Would Make Fixed-Price Contracting the Federal Default

A proposed Federal Acquisition Regulation (FAR) rule published on September 18, 2026, would revise FAR Parts 16, 17, and 35 and move fixed-price contracting toward the federal default. The proposal puts contract-type selection in sharper focus for agencies and acquisition teams, which may need to document why they choose a non-fixed-price arrangement and obtain agency-head approval when specified thresholds are exceeded. These are proposed changes, not finalized requirements, so contractors should monitor the rulemaking rather than treat the provisions as already in force.

The potential shift carries practical implications for companies that bid on federal work, particularly small and midsize contractors. Under fixed-price arrangements, the contractor generally bears greater responsibility for managing costs against the agreed price. If labor, indirect costs, or other expenses are higher than estimated, a contractor may face cost overruns that cannot simply be passed through to the government. The proposal therefore makes the quality of a company’s estimating and cost-control practices relevant not only to execution, but also to deciding whether a fixed-price opportunity is commercially viable.

Contractors can use the proposal as a prompt to test whether they have reliable contract-level cost visibility. Labor tracking and disciplined timekeeping help connect employee effort to the work performed, while regular cost reviews can reveal variance early enough for management to respond. Complete and supportable overhead pricing is also important: weak allocation practices can distort estimates and obscure the true cost of performance. These practices can inform bid/no-bid decisions and help firms assess whether their internal systems are ready for more fixed-price work.

For acquisition teams, the proposed revisions to FAR Parts 16, 17, and 35 could add planning and approval considerations when selecting contract types. Agencies may need to account for written justification and agency-head approval steps for non-fixed-price arrangements, subject to the proposal’s specified thresholds. The Federal Acquisition Regulatory Council, Office of Management and Budget, Defense Contract Audit Agency, and Department of Defense are identified in the source material. The available source excerpt provides no threshold figures or detailed regulatory text, so contractors should avoid assuming particular approval levels or implementation dates until authoritative rulemaking materials clarify them.

• The proposed rule was published September 18, 2026 and would revise FAR Parts 16, 17, and 35.
• The proposal would move fixed-price contracting toward the federal default; it is not described as a finalized requirement.
• Agencies may need written justification for non-fixed-price arrangements under the proposal.
• Agency-head approval may be required for non-fixed-price arrangements above specified thresholds; the source does not provide the threshold amounts.
• Small and midsize contractors could face increased exposure to cost overruns when fixed prices do not cover actual performance costs.
• Contractors should review contract-level labor tracking and ensure timekeeping reliably connects labor hours to contract work.
• Regular cost reviews can help identify performance variances, while complete overhead pricing supports credible estimates.
• Acquisition teams should consider the proposed justification and approval steps in contract-type selection and acquisition planning.
• Contractors should monitor the rulemaking and evaluate fixed-price opportunities against their estimating, pricing, and cost-control capabilities.