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DFARS: Defense Federal Acquisition Regulation Supplement

Additional requirements for Defense Department contracts beyond the FAR.

intermediate8 min readStep-by-step guide

Summary

DFARS: Defense Federal Acquisition Regulation Supplement Additional requirements for Defense Department contracts beyond the FAR.

Source & Authority Information

Information as of: January 2026
Author: GovContractFinder Team
Additional sources:
  • •Defense Federal Acquisition Regulation Supplement(accessed 2026-01-15)
  • •Defense Contract Audit Agency(accessed 2026-01-15)

Understanding DFARS Structure

Key DFARS Parts for Contractors

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  • DFARS Part 204: Administrative requirements including safeguarding covered defense information and cybersecurity requirements (DFARS 252.204-7012)
  • DFARS Part 212: Special requirements for commercial item acquisitions by DoD, which apply even when buying commercial products
  • DFARS Part 215: DoD-specific requirements for contracting by negotiation, including cost or pricing data thresholds
  • DFARS Part 225: Foreign acquisition and domestic preference requirements, including qualifying country provisions
  • DFARS Part 227: Intellectual property rights in technical data and computer software, often more restrictive than commercial norms
  • DFARS Part 231: DoD contract cost principles and procedures, including compensation limits and allowable costs
  • DFARS Part 252: Contract clauses prescribed by DFARS, the source of most specific compliance obligations
  • Cybersecurity Requirements: DFARS 252.204-7012

    CMMC: The Evolving Cybersecurity Framework

    1. 1
      Determine your required CMMC level

      Review current and target contracts to understand whether they involve FCI only (Level 1), standard CUI (Level 2), or high-value CUI (Level 3). This determines your compliance obligations.

    2. 2
      Conduct gap assessment

      Compare your current security posture against applicable NIST SP 800-171 controls. Identify gaps requiring remediation before certification assessment.

    3. 3
      Develop System Security Plan

      Document your CUI boundary, implemented controls, and security architecture. The SSP is foundational documentation for both self-assessment and third-party certification.

    4. 4
      Create Plan of Action and Milestones

      For any controls not fully implemented, document specific remediation plans with timelines. POA&Ms show assessors your path to full compliance.

    5. 5
      Implement required controls

      Execute your remediation plan to close gaps before assessment. Some controls require significant technical implementation; build adequate time into your schedule.

    6. 6
      Prepare for assessment

      Whether self-assessing or engaging a third-party assessor, gather evidence demonstrating control implementation. Prepare staff to explain and demonstrate security practices.

    Cost Accounting and Pricing Requirements

    Cost Accounting Standards Overview

    • CAS applicability: Contractors receiving CAS-covered contracts must follow specific standards for measuring, assigning, and allocating costs. Applicability depends on contract values and contractor characteristics.
    • Modified CAS coverage: Smaller contractors may qualify for modified coverage, requiring compliance with only CAS 401 (consistency) and CAS 402 (consistency between cost estimates and accumulation).
    • Full CAS coverage: Larger contractors with significant government business must comply with all 19 Cost Accounting Standards, requiring comprehensive cost accounting system changes.
    • Disclosure statements: CAS-covered contractors must file disclosure statements describing their cost accounting practices. Changes require advance notice and may trigger cost impacts.
    • Adequate accounting systems: DoD requires contractors to maintain accounting systems adequate for accumulating and reporting costs. DCAA audits verify system adequacy.

    Technical Data and IP Rights

    Foreign Acquisition Restrictions

    Key Foreign Acquisition Provisions

    • Restricted sources: Certain countries are prohibited sources for defense procurement, with restrictions varying based on item type and contract purpose
    • Specialty metals: Required domestic or qualifying country sourcing for metals in defense applications, with limited exceptions
    • Qualifying country provisions: Defense trade agreements allow products from partner nations to receive domestic-like treatment
    • Berry Amendment: Additional restrictions on food, clothing, textiles, and certain other items requiring domestic sourcing
    • Domestic photovoltaic devices: Specific requirements for solar energy products used in defense applications
    • Information technology: Restrictions on IT products containing certain foreign components or software

    Contractor Business Systems

    Subcontractor Flow-Down Requirements

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