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    54 - Professional, Scientific, and Technical Services

    When navigating the landscape of government contracting and industry classification, understanding NAICS codes is essential. One of the most vital and versatile codes is NAICS code 54, which covers the Professional, Scientific, and Technical Services sector. This sector plays a critical role in providing specialized expertise in numerous fields, impacting everything from legal compliance to engineering innovation.

    What is NAICS Code 54?

    NAICS Code 54 represents establishments primarily engaged in performing professional, scientific, and technical activities for others. These activities are distinguished by the necessity of high-level knowledge, expertise, and often specialized training or licensing.

    Sector Overview: Professional, Scientific, and Technical Services

    This sector encompasses a wide variety of business services, typically requiring advanced education or credentials. Unlike manufacturing or retail sectors, businesses in NAICS 54 provide knowledge-based services that help other organizations operate more effectively and comply with complex regulatory environments.

    Typical Business Activities under NAICS Code 54

    Here are some common types of businesses and activities you’ll find in this sector:

    • Legal Services: law firms, legal consultants, and paralegal services.
    • Accounting, Tax Preparation, Bookkeeping, and Payroll Services: including certified public accountants (CPAs) and tax advisors.
    • Architectural, Engineering, and Related Services: including civil, mechanical, and electrical engineering firms.
    • Computer Systems Design and Related Services: software design, programming, and IT consulting.
    • Scientific Research and Development Services: research labs and biotech consultants.
    • Management, Scientific, and Technical Consulting Services: business strategy, environmental consulting, and more.

    NAICS Code 54 Size Standards for Eligibility

    For businesses aiming to qualify as small under NAICS code 54, the Small Business Administration (SBA) size standards are typically based on annual revenue or number of employees depending on the sub-sector. Most subcategories under NAICS 54 have an employee-based standard of 1,250 employees, but some might have alternative revenue-based size standards.

    Consult the SBA’s official size standards to verify your specific business activity and ensure eligibility for government contracting opportunities.

    Detailed Breakdown of NAICS Code 54

    NAICS Code Title Description
    541 Professional, Scientific, and Technical Services Establishments providing high-skill services based on expertise, training, or licensing.
    5411 Legal Services Firms offering legal advice and representation.
    5412 Accounting, Tax Preparation, Bookkeeping, and Payroll Services Services related to financial recordkeeping and tax assistance.
    5413 Architectural, Engineering, and Related Services Design and engineering consulting firms.
    5414 Specialized Design Services Graphic design, interior design, and industrial design.
    5415 Computer Systems Design and Related Services IT consulting, software design, and development.
    5416 Management, Scientific, and Technical Consulting Services Business and environmental consulting services.
    5417 Scientific Research and Development Services Laboratories and scientific research companies.
    5418 Advertising and Related Services Advertising agencies, public relations, and media buying.
    5419 Other Professional, Scientific, and Technical Services Miscellaneous specialized services not classified elsewhere.

    FAQs about NAICS Code 54

    What types of businesses are covered under NAICS code 54?

    NAICS 54 covers businesses that provide professional, scientific, and technical expertise such as legal, accounting, engineering, design, IT services, research, and consulting.

    How do size standards apply to businesses under NAICS 54?

    Most businesses under this code have a size standard based on employee count, typically up to 1,250 employees, although some sub-sectors may use revenue thresholds.

    Why is NAICS code 54 important for government contracting?

    Many government contracts require specialized expertise found in NAICS 54. Using the proper NAICS code is crucial for bidding on contracts and identifying eligible procurement opportunities.

    Can small businesses register under NAICS 54?

    Yes, many small businesses fall under NAICS 54 and can benefit from SBA programs designed for small entities, including eligibility for set-asides in federal contracting.


    In summary, NAICS code 54—Professional, Scientific, and Technical Services—encompasses a broad range of knowledge-intensive service providers vital to business operations and government functions. From legal advisory to cutting-edge scientific research, businesses under this sector offer essential services that depend heavily on expertise and technical proficiency.

    For businesses seeking to understand or classify their services, recognizing the scope and details of NAICS 54 can unlock new opportunities in both the private and public sectors.