PSC AC31: National Defense R&D Services; Defense – Related Activities; Basic Research
AC31 is the product and service code (PSC) federal agencies use for national defense r&d services; defense – related activities; basic research, in the r&d – ships group. Here are the contracts open under it now, the NAICS codes it pairs with, and who buys and wins this work.
- Open contracts now
- 4
- Spending, FY2026
- $919.9 million
- Share to small businesses
- 11%
Open contracts with PSC AC31, due soonest
- Announcement for Upcoming 2027 NSRP R&D Project Solicitations
Due in 52 daysDec 1, 2026
- Announcement for Upcoming 2027 NSRP R&D Project Solicitations
Due in 52 daysDec 1, 2026
- Announcement for Upcoming 2027 NSRP Panel Project Solicitation
Due in 52 daysDec 1, 2026
- Science and Technology Broad Agency Announcement
Due in 1240 daysMar 3, 2030
Where AC31 sits in the PSC Manual
- Category: Research and Development
- Group AC: C – National Defense R&D Services
- Group AC3: R&D – Ships
- Code AC31: National Defense R&D Services; Defense – Related Activities; Basic Research
NAICS codes used with PSC AC31
The NAICS code on a contract sets the size standard for who counts as small. These are the codes agencies pair with AC31 most often:
| NAICS | Industry | Spent, last 3 years |
|---|---|---|
| 541712 | Research and Development in the Physical, Engineering, and Life Sciences (Except Biotechnology) | $1.5 billion |
| 541715 | Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology) | $643.7 million |
| 541330 | Engineering Services | $163.9 million |
| 541511 | Custom Computer Programming Services | $42.3 million |
| 336992 | Military Armored Vehicle, Tank, and Tank Component Manufacturing | $41.7 million |
| 611310 | Colleges, Universities, and Professional Schools | $37.8 million |
| 336611 | Ship Building and Repairing | On 3 open |
Who buys under PSC AC31
Agencies with the most contract dollars under AC31 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Department of the Air Force | $2.1 billion |
| Department of the Navy | $191.3 million |
| Department of the Army | $104.9 million |
| Defense Microelectronics Activity | $55.2 million |
| Defense Health Agency | $27.5 million |
| Federal Acquisition Service | $23.9 million |
| U.S. Special Operations Command | $13.8 million |
| Defense Information Systems Agency | $12.1 million |
Federal spending under PSC AC31 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $616 million |
| FY2025 | $975.3 million |
| FY2026 | $919.9 million |
| FY2027 (so far) | $0 |
Who wins PSC AC31 contracts
| Company | Obligated, last 3 years |
|---|---|
| Massachusetts Institute of Technology | $1.7 billion |
| Carnegie Mellon University | $96.4 million |
| Mclaughlin Research Corporation | $61.2 million |
| Hypergiant Galactic Systems, Inc. | $51.4 million |
| Cubrc, Inc. | $38 million |
| Lockheed Martin Corporation | $34.7 million |
| Envisioneering Inc | $30.2 million |
| Chenega Professional & Technical Services LLC | $27.3 million |
| Seed Innovations, LLC | $24.4 million |
| Textron Systems Corporation | $22.6 million |
Related PSC codes
- AC32 National Defense R&D Services; Defense – Related Activities; Applied Research
- AC33 National Defense R&D Services; Defense – Related Activities; Experimental Development
- AC34 National Defense R&D Services; Defense – Related Activities; R&D Administrative Expenses
- AC35 National Defense R&D SVCS; Defense – Related Activities; R&D Facilities & Maj Equip
- AC36 R&D – Defense System: Ships (Management/Support)
- AC37 R&D – Defense System: Ships (Commercialized)
Frequently asked questions
What is PSC AC31?
AC31 is the research and development code in the federal Product and Service Code (PSC) Manual for national defense r&d services; defense – related activities; basic research, under AC (C – National Defense R&D Services) and AC3 (R&D – Ships). Agencies put a PSC on every contract to record what they bought.
What is the difference between a PSC and a NAICS code?
A PSC describes what the government is buying. A NAICS code describes the industry of the business doing the work, and it sets the SBA size standard for small business set-asides. Every contract notice has both.
How do I find contracts that use PSC AC31?
Contract opportunities are posted on SAM.gov with their PSC and NAICS codes. 4 open notices use PSC AC31 right now. FedReady can match new ones to your business and email you, free.