Acquisition Category (ACAT)

Acquisition Category (ACAT) is the Department of Defense's tiered classification system that determines the level of management oversight, milestone decision authority, and reporting requirements for defense acquisition programs based on their estimated cost and strategic significance.

What is Acquisition Category?

DoD assigns every major acquisition program to an ACAT level under DoD Instruction 5000.02. The category determines who has decision authority over the program and what reporting requirements apply. There are four primary ACAT levels:

• ACAT I: Major Defense Acquisition Programs (MDAPs). These are the largest programs, with estimated procurement costs exceeding $365 million or total research, development, test, and evaluation costs exceeding $218 million (in FY 2000 constant dollars). ACAT I programs are further divided into ACAT ID (decision authority at the Defense Acquisition Board level) and ACAT IC (decision authority at the DoD Component Acquisition Executive). Examples include the F-35 fighter jet and the Navy's next-generation destroyer programs.

• ACAT IA: Major Automated Information Systems (MAIS). These are major IT programs with estimated program costs exceeding $40 million in any single year or $165 million over the entire program. Decision authority rests with the DoD CIO or Component Acquisition Executive.

• ACAT II: Programs below ACAT I thresholds but still significant enough to require Component Acquisition Executive oversight. Estimated procurement costs typically between $185 million and $365 million.

• ACAT III: Programs below ACAT II thresholds, managed at the Program Executive Officer or equivalent level. These programs have the most streamlined oversight.

Why Acquisition Category matters for government contractors

ACAT classification signals program scale and procurement timeline. ACAT I programs typically take five to ten years from concept to production contract, involve detailed source selection processes, and generate billions in contract opportunities across prime contracts and subcontracting. Contractors pursuing ACAT I work must invest heavily in proposal development, often spending millions in bid and proposal costs before a single award is made. Understanding a program's ACAT level helps contractors calibrate their investment and timeline expectations.

Example

The Army's next-generation combat vehicle program is classified as ACAT I, with estimated procurement costs exceeding $10 billion. Decision authority rests with the Defense Acquisition Board. The program has formal milestone reviews, Milestone A (technology maturity), Milestone B (program start), and Milestone C (production approval), each requiring extensive documentation and Congressional notification. Prime contractors competing for this program began their capture efforts years before the Milestone B RFP was released.

Frequently Asked Questions

What triggers an ACAT reclassification?

Programs can be reclassified if cost estimates change significantly. A program that starts as ACAT III but experiences cost growth can be elevated to ACAT II or ACAT I, triggering additional oversight requirements and potentially delaying the program.

Does ACAT apply only to DoD?

Yes. ACAT is a DoD-specific classification system. Civilian agencies have their own major acquisition designations under OMB guidance, but they do not use the ACAT terminology.

How does ACAT affect competition?

Higher ACAT programs tend to have longer and more complex competitions. ACAT I programs almost always use full and open competition with elaborate source selection procedures. Lower ACAT programs may use simplified acquisition methods.

Where can I find a program's ACAT level?

The DoD's Selected Acquisition Reports, submitted to Congress annually, list all ACAT I and ACAT IA programs with cost, schedule, and performance data. Defense acquisition program databases maintained by each military department also track ACAT assignments.