Contracting Activity Code (CAC)
A Contracting Activity Code (CAC) is a unique identifier assigned to a specific contracting office or activity within a federal agency. It distinguishes which internal office is responsible for issuing, awarding, and administering a contract, ensuring procurement actions are traceable to the correct contracting authority inside an agency.
What Is a Contracting Activity Code (CAC)?
A Contracting Activity Code (CAC) is a unique identifier assigned to a specific contracting office or activity within a federal agency. It distinguishes which internal office is responsible for issuing, awarding, and administering a contract.
The CAC ensures procurement actions are traceable to the correct contracting authority inside an agency.
Key Characteristics of a CAC
Large agencies often operate multiple contracting activities. For example, the Department of Defense has contracting offices across the Army, Navy, Air Force, and Defense Agencies, and the General Services Administration operates multiple regional and program-specific contracting centers — each with its own CAC.
Identifies a Specific Contracting Office
A CAC does not identify the agency as a whole. It identifies a particular contracting activity within that agency.
Used in Procurement Documentation
CACs appear in solicitations, contract awards, modifications, and procurement reporting systems.
Supports Tracking and Accountability
They allow agencies to track spending by contracting office, manage internal procurement oversight, and report acquisition data accurately.
Regulatory Framework
While CAC structure is agency-specific, usage aligns with federal procurement frameworks governed by the Federal Acquisition Regulation (FAR). CACs also tie into procurement reporting systems and internal acquisition policy controls that ensure:
Proper contracting authority
Oversight responsibility
Audit traceability
Why CAC Matters for Contractors
For contractors, understanding the CAC is important because it identifies the responsible contracting office, ensures proposals and invoices are directed correctly, affects communication routing, and impacts contract reporting and administration. Misidentifying a contracting activity can result in:
Delays in award processing
Misrouted invoices
Administrative confusion
Reporting errors
For example, if a contractor receives a solicitation from a specific Army contracting center, the CAC identifies that office, the contracting officer associated with that CAC holds procurement authority, and all official communications and submissions must align with that activity. Even within the same agency, different contracting activities may have different internal procedures.
Common Misconceptions About CAC
CAC identifies the contractor.
A CAC identifies the government contracting office, not the contractor.
CAC is the same as a DUNS or UEI number.
DUNS (legacy) and UEI identify vendors. CAC identifies the government contracting activity.
All offices within an agency share one CAC.
Large agencies typically maintain multiple CACs across divisions and regions.
Frequently Asked Questions
Where can I find the CAC?
It is typically listed in solicitation documents, contract award forms, and procurement data systems.
Does every contract have a CAC?
Yes. Every federal contract is issued by a specific contracting activity.
Can CAC affect payment?
Indirectly, yes. Payments and contract administration are tied to the responsible contracting office.
Related Government Contracting Topics
Contracting Officer (CO): The authorized government official within a contracting activity who signs and administers contracts.
Procurement Instrument Identifier (PIID): The unique number assigned to each contract for tracking purposes.
Unique Entity Identifier (UEI): The official identifier for contractors doing business with the federal government.
Contract Administration Office (CAO): The office responsible for post-award administration and oversight.
Federal Acquisition Regulation (FAR): The primary regulatory framework governing federal procurement.
Understanding the Contracting Activity Code helps contractors navigate federal procurement structures more effectively. It ensures communications, compliance, and reporting align with the correct contracting authority inside the agency.