Department of War Modernized Contractor Accounting Rules

The department has mandated a transition to GAAP standards to increase industrial efficiency and transparency.

Updated on Sept. 18, 2026 in Economic Policy

Isometric editorial illustration of a precision steel bolt on a granite surface, symbolizing industrial standardization and policy reform. — The Department of War has mandated that defense contractors transition to GAAP standards, aiming to enhance industrial efficiency and transparency through reduced administrative requirements. AI Illustration. Upload story photo >

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Should federal government contractors be required to use standard commercial accounting instead of unique government standards?

The Department of War has issued a new memorandum directing government contractors to shift from Cost Accounting Standards to Generally Accepted Accounting Principles (GAAP). This policy change aims to align contractor requirements with commercial standards while prioritizing fixed-price contracts for competitive acquisitions.

Why it matters

By adopting commercial accounting standards and limiting audits, the department intends to reduce administrative burdens and incentivize industrial base efficiency. This shift allows contractors to retain savings gained through improved operational performance.

The department has established a 30-day window for new transparency procedures, a 60-day limit for CAS exemption proposals, and a 90-day deadline for DFARS profit policy updates.

The players

Department of War

This federal agency is responsible for overseeing defense contracting and the management of the industrial base.

Cost Accounting Standards Board

This board oversees the standards for measuring, assigning, and allocating costs to government contracts.

The details

Under the new policy, business-system reviews will be replaced by certifications from independent public accounting firms, while audits move to a risk-based model. Cost Accounting Standards coverage will now be restricted exclusively to sole-source, incentive-fee, or cost-based development contracts.

September 14, 2026: The Department of War issued the policy memorandum.
October 14, 2026: Deadline for supplier transparency implementing procedures.
November 13, 2026: Deadline for proposals to the CAS Board.
December 13, 2026: Deadline for DFARS profit policy rulemaking.

Macro View

This memorandum follows a historical pattern of aligning federal procurement with private sector practices to streamline industrial operations. It marks a significant departure from the established framework of Cost Accounting Standards, reflecting a move toward commercial accounting norms.

This policy adjustment is set to shift how federal contractors manage their internal business systems and audit preparations. Contractors should anticipate changes in compliance requirements as the department transitions toward GAAP-aligned criteria.

The takeaway

The move toward GAAP standards signals a shift toward reduced federal oversight in favor of private sector efficiency metrics. Contractors should review their internal accounting workflows to ensure alignment with the upcoming shift in federal procurement requirements.

What happens next

The department is required to submit proposals to the Cost Accounting Standards Board within 60 days, followed by a DFARS profit policy rewrite due within 90 days of the September 14, 2026, announcement.