541990

All Other Professional, Scientific, and Technical Services

Professional, Scientific, and Technical Services › Professional, Scientific, and Technical Services › Other Professional, Scientific, and Technical Services

SBA Size Standard

$19.5M average annual receipts

Revenue-Based Verify at SBA.gov →

NAICS Code Hierarchy

54

Sector

Professional, Scientific, and Technical Services

541

Subsector

Professional, Scientific, and Technical Services

5419

Industry Group

Other Professional, Scientific, and Technical Services

541990

National Industry (This Code)

All Other Professional, Scientific, and Technical Services

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
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). 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

✓ Small Business Eligibility at a Glance

Based on SBA Table of Small Business Size Standards (2024)

Size Standard

$19.5M average annual receipts

Measurement Period

3-year average

Standard Type

Revenue-Based

Applies To

All contracts under NAICS 541990

Set-Aside Programs

8(a), WOSB, HUBZone, SDVOSB

Certification Required

No (self-certify in SAM.gov)

Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.

Cross-References

The following activities are classified elsewhere in the NAICS system:

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;
Providing advertising and related services--are classified in Industry Group 5418, Advertising, Public Relations, and Related Services;
Providing marketing research and public opinion polling--are classified in Industry 541910, Marketing Research and Public Opinion Polling;
Providing photographic services--are classified in Industry 54192, Photographic Services;
Providing translation and interpretation services--are classified in Industry 541930, Translation and Interpretation Services;
Providing veterinary services--are classified in Industry 541940, Veterinary Services; and
Providing real estate appraisal services--are classified in Industry 531320, Offices of Real Estate Appraisers.

How to Use NAICS 541990 in SAM.gov

NAICS code 541990All Other Professional, Scientific, and Technical Services — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Other Professional, Scientific, and Technical Services space will be able to find your business.

If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of $19.5M average annual receipts, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 541990.

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Frequently Asked Questions

What is NAICS code 541990?

NAICS code 541990 is 'All Other Professional, Scientific, and Technical Services', classified under the Professional, Scientific, and Technical Services sector (NAICS 54). This industry comprises establishments primarily engaged in the provision of professional, scientific, or technical services (except legal services; accounting, tax preparation, bookkeeping, and relat

What is the SBA small business size standard for NAICS code 541990?

The SBA defines a small business under NAICS code 541990 (All Other Professional, Scientific, and Technical Services) as one with $19.5M average annual receipts. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.

How do I register NAICS code 541990 in SAM.gov?

To register NAICS code 541990 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 541990 (All Other Professional, Scientific, and Technical Services) to your NAICS code list. You may designate one code as your Primary NAICS code.

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Related NAICS Codes

Other codes in Other Professional, Scientific, and Technical Services

Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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