NAICS541511National industry
Custom Computer Programming Services
Businesses in this NAICS code primarily design, write, modify, and test software built for a specific client need.
Classification summary
Businesses in this NAICS code primarily design, write, modify, and test software built for a specific client need.
- Taxonomy
- NAICS
- Slug
- 541511
- Primary use
- Custom software development delivered as a client service.
Common businesses using this code
- Custom software consultancies building internal tools or client-facing applications.
- Development firms shipping bespoke systems under contract for specific customers.
- Engineering teams hired to extend, modernize, or replace client-owned software.
Don't confuse with
Systems architecture and integration work, rather than custom coding itself.
513210Software Publishers
A repeatable software product, rather than client-service development.
Specialized computer support and adjacent technical services, rather than custom application development.
Related codes
Official source
U.S. Census Bureau NAICS 541511 pageOfficial Census NAICS lookup remains the anchor source for classification wording and verification.