2022 NAICS national industry in sector 54 Professional, Scientific, and Technical Services

541511 Custom Computer Programming Services

NAICS 541511 is the US industry code for custom computer programming services. This U.S.

Code: 541511 (2022 NAICS)
Title: Custom Computer Programming Services
Part of: Computer Systems Design and Related Services
SBA small business limit: Average annual receipts up to $34 million
Closest UK SIC: 62011, 62012 (details)

Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.

Official definition

This U.S. industry comprises establishments primarily engaged in writing, modifying, testing, and supporting software to meet the needs of a particular customer.

Source: US Census Bureau, 2022 NAICS descriptions.

When to use a different code

Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:

Software design, development, and publishing, or software publishing only are classified in Industry 513210, Software Publishers.
Providing computing infrastructure, data processing services, Web hosting services (except software publishing), and related services, including streaming support services (except streaming distribution services) are classified in Industry 518210, Computing Infrastructure Providers, Data Processing, Web Hosting, and Related Services.
Planning and designing computer systems that integrate computer hardware, software, and communication technologies, even though such establishments may provide custom software as an integral part of their services are classified in U.S. Industry 541512, Computer Systems Design Services.

Source: US Census Bureau, 2022 NAICS cross-references.

Businesses that use this code

Activities listed under 541511

The Census index assigns these 18 activities to this code. If your business matches one, this is your code.

Applications software programming services, custom computer
Computer program or software development, custom
Computer programming services, custom
Computer software analysis and design services, custom
Computer software programming services, custom
Computer software support services, custom
Industrial robot automation applications/software design and development services
Industrial robot programming services
Machine vision software design and development services
Material handling robot applications/software design and development services
Programming services, custom computer
Robotics applications/software design and development services
Robotics process automation software design and development services
Search engine optimization (SEO) services, custom (except hosting and infrastructure support services)
Software analysis and design services, custom computer
Software programming services, custom computer
Web (i.e., Internet) page design services, custom
Welding robot applications/software design and development services

Source: US Census Bureau, 2022 NAICS index file.

SBA size standard for 541511

To count as a small business for SBA loans and federal contracts under NAICS 541511, your business (including affiliates) must not exceed $34 million in average annual receipts. Check your business.

Source: SBA table of size standards, effective March 17, 2023.

Closest UK SIC 2007 codes

There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 6201), so treat them as a starting point and check the definition.

Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.

Similar codes to compare

Data last changed November 14, 2026. How this page is built.