541990 — All Other Professional, Scientific, and Technical Services
Description
This industry comprises establishments primarily engaged in the provision of professional, scientific, or technical services (except legal services; accounting, tax preparation, bookkeeping, and related services; architectural, engineering, and related services; specialized design services; computer systems design and related services; management, scientific, and technical consulting services; scientific research and development services; advertising, public relations, and related services; market research and public opinion polling; photographic services; translation and interpretation services; and veterinary services) (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Illustrative Examples
- Appraisal (except real estate) services
- Marine surveyor (i.e., appraiser) services
- Arbitration and conciliation services (except by lawyer, attorney, or paralegal offices)
- Patent broker services (i.e., patent marketing services)
- Commodity inspector services
- Pipeline or power line inspection (i.e., visual) services
- Consumer credit counseling services
- Weather forecasting services
- Handwriting analysis services
Exclusions & Cross-References
- Providing legal services--are classified in Industry Group 5411, Legal Services;
- Providing accounting, tax preparation, bookkeeping, and payroll services--are classified in Industry Group
- 5412, Accounting, Tax Preparation, Bookkeeping, and Payroll Services;
- Providing architectural, engineering, and related services--are classified in Industry Group 5413,
- Architectural, Engineering, and Related Services;
- Providing specialized design services--are classified in Industry Group 5414, Specialized Design Services;
- Providing computer systems design and related services--are classified in Industry Group 5415, Computer
- Systems Design and Related Services;
- Providing management, scientific, and technical consulting services--are classified in Industry Group 5416,
- Management, Scientific, and Technical Consulting Services;
- Providing scientific research and development services--are classified in Industry Group 5417, Scientific
- Research and Development Services;
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 7389 - Business Services (via SIC1987:7389→NAICS1997:54199→2002:541990→2007:541990→2012:541990→2017:541990→2022:541990)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC AJ13 — GENERAL SCIENCE & TECHNOLOGY R&D SVCS; GENERAL SCIENCE & TECHNOLOGY; EXPERIMENTAL DEVELOPMENT
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 541990 valid in 2022? ▾
Yes, 541990 is a valid 6-digit 2022 NAICS national industry code representing 'All Other Professional, Scientific, and Technical Services' under Sector 54 in the official classification index.
What is the SBA size standard for NAICS code 541990? ▾
The Small Business Administration (SBA) has established a small business size standard of $19,500,000 for NAICS code 541990 (All Other Professional, Scientific, and Technical Services), calculated based on receipts.
What is the legacy SIC equivalent for NAICS 541990? ▾
According to official Census Bureau concordance tables, NAICS code 541990 (All Other Professional, Scientific, and Technical Services) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 7389 - Business Services.
Related Pages & Tools
Further regulatory reference links for NAICS code 541990:
- Sector 54 Directory Hub — List of related industries in the Professional, Scientific, and Technical Services sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 541990 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (All Other Professional, Scientific, and Technical Services).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.