By Outrider Editorial Team · Updated August 20, 2026
PSC DA01 is the labor code for application work. The PSC Manual scopes it as support services for analysis, design, development, coding, testing, and release packaging, plus support of off-the-shelf business applications, and it explicitly names user research, human centered design, DevSecOps, and customer experience as included activities. Both greenfield software projects and sustainment of existing applications belong here. At $22.6 billion in FY2025, DA01 is the largest IT services code in the federal government.
The registration that actually wins
DA01 is literally an application development code, but Computer Systems Design Services (541512) took $11.7 billion, more than three times the $3.6 billion that went to 541511, Custom Computer Programming Services. Other Computer Related Services (541519) sits between them at $4.2 billion. Engineering services 541330 adds $710 million and 518210 another $635 million. The systems integration registration, not the programming registration, is what the money follows.
Why both code systems exist
The PSC tells you what was bought and the NAICS code tells you who sold it, which is why a development code can be dominated by an integration industry.
If you build software for agencies and are registered only under 541511, you are in the smaller pool. Watch DA01 by PSC and consider whether 541512 belongs on your registration too.
NAICS crosswalk
Where FY2025 DA01 dollars landed, by the winning vendor's registered NAICS code.
- 541512Computer Systems Design Services$11.7B
- 541519Other Computer Related Services$4.2B
- 541511Custom Computer Programming Services$3.6B
- 541330Engineering Services$710.4M
FY2025 federal contract obligations, USAspending.gov
Frequently Asked
PSC DA01 questions, answered.
What does PSC DA01 cover?
Application development and support delivered as labor: analysis, design, development, coding, testing, release packaging, and support of off-the-shelf business applications. The manual specifically includes user research, human centered design, DevSecOps, and customer experience work.
What NAICS codes win DA01 work?
Computer Systems Design Services (541512) dominates at $11.7 billion, ahead of Other Computer Related Services (541519) at $4.2 billion and Custom Computer Programming Services (541511) at $3.6 billion.
What is the difference between DA01 and DA10?
DA01 is labor. DA10 is the same functional area delivered as a service contract, subscription, or SaaS. The manual treats subscription software provisioning as a service, so a term license lands in DA10 while the developers building against it are DA01.
Is DevSecOps work coded DA01 or DJ01?
The manual lists DevSecOps under DA01. DJ01 is the security and compliance code, and it explicitly pushes implementation actions out to whichever tower performs them, so pipeline security engineering inside an application team is DA01.
Watch DA01 opportunities
Solicitations are filed by PSC as well as NAICS. Outrider matches your company profile against both so nothing filed under a code you do not watch slips past.
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