Defense Federal Acquisition Regulation Supplement (DFARS)
The Defense Federal Acquisition Regulation Supplement is the set of acquisition regulations used by the Department of Defense to procure goods and services. It supplements and expands upon the Federal Acquisition Regulation (FAR) by providing DoD-specific policies, procedures, and contract clauses that address national defense requirements.
What Is DFARS?
The Defense Federal Acquisition Regulation Supplement is the set of acquisition regulations used by the Department of Defense to procure goods and services. It supplements and expands upon the Federal Acquisition Regulation (FAR), which governs procurement across all federal executive agencies.
DFARS provides DoD-specific policies, procedures, and contract clauses that address national defense requirements.
DFARS exists to tailor federal procurement rules to the unique needs of the Department of Defense. It applies to defense contracts, subcontracts supporting DoD programs, contractors handling sensitive defense information, and suppliers supporting military systems and services.
If you are doing business with the DoD, DFARS compliance is mandatory.
Structure of DFARS
DFARS mirrors the structure of the FAR but adds defense-specific rules. Key areas include:
DFARS Part 201: Federal Acquisition Regulations System: Establishes the authority and applicability of DFARS within DoD acquisitions.
DFARS Part 204: Administrative and Information Matters: Includes cybersecurity, safeguarding covered defense information, and reporting requirements.
DFARS Part 212: Acquisition of Commercial Products and Services: Provides guidance for purchasing commercial items under defense contracts.
DFARS Part 225: Foreign Acquisition: Addresses domestic preference, specialty metals restrictions, and trade compliance.
DFARS Part 252: Solicitation Provisions and Contract Clauses: Contains mandatory clauses inserted into DoD contracts, including cybersecurity and reporting requirements.
Why DFARS Matters in Government Contracting
DFARS ensures that DoD acquisitions protect national security interests, address supply chain risk, enforce cybersecurity requirements, comply with domestic sourcing laws, and maintain oversight of sensitive technologies.
Because defense programs involve classified systems, advanced weapons, and critical infrastructure, DFARS adds layers of protection beyond standard federal procurement rules.
Major DFARS Compliance Areas
Cybersecurity Requirements: DFARS includes clauses requiring compliance with NIST SP 800-171, incident reporting within strict timelines, and safeguarding Covered Defense Information. These cybersecurity provisions are foundational to DoD contractor eligibility.
Domestic Sourcing Rules: DFARS enforces restrictions related to specialty metals, Buy American Act requirements, and Trade Agreements Act compliance. Contractors must verify supply chain sourcing to avoid violations.
Supply Chain Risk Management: DFARS gives DoD authority to exclude or remove suppliers that pose national security risks, especially relevant in technology and electronics procurement.
Example Scenario
A contractor supplying encrypted communications equipment to the DoD must implement cybersecurity controls under DFARS 252.204-7012, ensure components comply with domestic sourcing requirements, and report cyber incidents within required timelines.
Failure to meet DFARS requirements could result in payment withholding or contract termination.
Common Misconceptions
DFARS only applies to large defense primes.
DFARS applies to both prime contractors and subcontractors supporting DoD contracts.
DFARS is optional if FAR is followed.
DFARS supplements FAR and is mandatory for DoD acquisitions.
DFARS only addresses contract clauses.
It also governs cybersecurity, supply chain risk, foreign sourcing, and reporting obligations.
Frequently Asked Questions
What is the difference between FAR and DFARS?
FAR governs all federal agencies. DFARS adds defense-specific requirements for DoD procurements.
Do small businesses need to comply with DFARS?
Yes. Any contractor supporting a DoD contract must comply, regardless of size.
How can contractors stay updated on DFARS changes?
Monitor the Defense Acquisition Regulations System (DARS) and Federal Register updates.
Related Government Contracting Topics
Federal Acquisition Regulation (FAR): The primary regulation governing federal procurement across all executive agencies.
Cybersecurity Maturity Model Certification (CMMC): A DoD framework that builds on DFARS cybersecurity requirements for protecting defense information.
NIST SP 800-171: A cybersecurity standard referenced in DFARS for protecting Controlled Unclassified Information.
Buy American Act (BAA): A domestic preference law affecting DoD acquisitions.
Defense Contract Management Agency (DCMA): Oversees contract performance, quality, and delivery for DoD contracts.
Strategic Importance
The Defense Federal Acquisition Regulation Supplement is foundational to defense contracting. Understanding DFARS is essential for maintaining compliance, protecting national security information, and securing long-term success in the Department of Defense acquisition ecosystem.
Contractors who proactively implement DFARS requirements—particularly in cybersecurity and supply chain management—position themselves as trusted partners capable of supporting the most sensitive and complex defense programs.