NAICS 541990 — All Other Professional, Scientific, and Technical Services

All Other Professional, Scientific, and Technical Services

NAICS 541990 is the national industry code for all other professional, scientific, and technical services establishments in the United States. The Small Business Administration sets a size standard of $19.5 for this classification. It forms part of the hierarchical North American Industry Classification System maintained by the Census Bureau.

SBA: $19.5 View full SBA standard

Exclusions & Cross-References

Activities classified under other official NAICS codes:

appraisal or evaluation services, real estate (See 531320 Offices of real estate appraisers (US))
insurance adjustment services (See 524291 Claims adjusters (US))
providing accounting, tax preparation, bookkeeping and payroll services (See 5412 Accounting, tax preparation, bookkeeping and payroll services)
providing advertising and related services (See 5418 Advertising, public relations, and related services)
providing architectural, engineering and related services (See 5413 Architectural, engineering and related services)
providing computer systems design and related services (See 5415 Computer systems design and related services)
providing legal services (See 5411 Legal services)
providing management, scientific and technical consulting services (See 5416 Management, scientific and technical consulting services)
providing marketing research and public opinion polling (See 541910 Marketing research and public opinion polling)
providing photographic services (See 541920 Photographic services (MEX))
providing scientific research and development services (See 5417 Scientific research and development services)
providing specialized design services (See 5414 Specialized design services)
providing translation and interpretation services (See 541930 Translation and interpretation services)
providing veterinary services (See 541940 Veterinary services (US))

Official Illustrative Examples

Primary activities officially recognized by Census Bureau / Statistics Canada:

appraising services (except insurance or real estate) arbitration and conciliation service, non-government bankruptcy trustees consumer credit counselling services estate assessment (i.e., appraisal) services handwriting expert and analysis services marine surveyor (i.e., ship appraisal) services meteorological services patent broker services (i.e., patent marketing services) pipeline and power line inspection (i.e., visual inspection) services weather forecasting services

Complete Index of Activities (28 recognized activities) ▼

aerial inspection service, pipelines

appraising services (except insurance or real estate)

arbitration and conciliation service, non-government

arbitration and conciliation services provided by paralegals

arbitrator (labour relations consultant) non government

art consultant services

avalanche hazard risk mitigation services

bankruptcy trustees

consumer credit counselling services

credit repair services

debt counsellor

electronic communication verification content services

estate assessment (i.e., appraisal) services

fine art consultant

handwriting expert and analysis services

home economist

jewellery appraisal and evaluation, service

marine surveyor (i.e., ship appraisal) services

meteorological services

monitoring the treatment of laboratory animals

patent broker services (i.e., patent marketing services)

patrolling (i.e., visual inspection) of electric transmission or gas lines

pipeline and power line inspection (i.e., visual inspection) services

quantity surveyor services

receivership services

referees in bankruptcy

weather forecasting services

wine stewardship (i.e., sommelier) services

Official data

Feature	Description
Official name	North American Industry Classification System (NAICS) 2022
Issuing authority	U.S. Census Bureau with OMB, Statistics Canada, and INEGI
Tax authority	Internal Revenue Service (IRS)
Purpose	Statistical business classification and federal contracting (SAM.gov, SBA standards)
Used in	SAM.gov registration, SBA size determinations, IRS tax classification, SEC EDGAR (via SIC crosswalk)
Active since	2022 (current edition)
Hierarchy level	Sector (2-digit)
Source	https://www.census.gov/naics/