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    Home/Glossary/6-Digit NAICS Code List
    Certifications & Qualifications

    6-Digit NAICS Code List

    Learn how the 6-digit NAICS code list determines small business size standards and eligibility for federal government contracts. Master your classification.

    Glossary entryBrowse NAICS demand lanesBrowse set-aside activity

    Introduction

    For any small business navigating the federal marketplace, the North American Industry Classification System (NAICS) is the cornerstone of your contracting strategy. When you search for opportunities on Sam.gov or analyze competitive landscapes using tools like SamSearch, you will notice that every solicitation is tagged with a specific 6-digit NAICS code. Understanding how to navigate the 6-digit NAICS code list is not just a compliance exercise; it is a critical step in identifying where your company fits within the federal supply chain.

    Definition

    The 6-digit NAICS code list is the standard classification system used by federal statistical agencies in classifying business establishments for the purpose of collecting, analyzing, and publishing statistical data related to the U.S. economy. In government contracting, these codes serve three primary purposes:

    1. Size Standards: The Small Business Administration (SBA) assigns a size standard (either in average annual receipts or number of employees) to each 6-digit code. This determines whether your firm qualifies as a "small business" for a specific contract.
    2. Market Research: Contracting officers use these codes to define the scope of a requirement and identify the pool of eligible vendors.
    3. Set-Asides: Many solicitations are "set aside" for small businesses based on the size standard associated with the primary NAICS code identified in the solicitation.

    Examples

    • NAICS 541511 (Custom Computer Programming Services): A common code for IT firms. If a solicitation uses this code, the SBA size standard is currently $34 million in average annual receipts.
    • NAICS 236220 (Commercial and Institutional Building Construction): A code for construction contractors, where the size standard is $45 million.
    • NAICS 561210 (Facilities Support Services): Often used for base operations support, with a size standard of $47 million.

    Frequently Asked Questions

    Q: Can I list multiple NAICS codes in my SAM.gov profile? Yes. You should list all codes that represent the goods or services your company is capable of providing. However, you must ensure your size status is accurate for each code.

    Q: Does the primary NAICS code on a solicitation dictate my eligibility? Yes. The contracting officer determines the NAICS code for each requirement. If your firm exceeds the size standard for that specific 6-digit code, you are considered "other than small" for that specific contract, regardless of your size in other areas.

    Q: How do I find the right NAICS code for my business? Review the official U.S. Census Bureau NAICS manual. You can also use SamSearch to analyze which codes your competitors are using to win contracts in your target agency.

    Q: What happens if I disagree with the NAICS code chosen for a solicitation? If you believe the NAICS code is incorrect, you can file a NAICS code appeal with the SBA Office of Hearings and Appeals (OHA) prior to the bid submission deadline.

    Conclusion

    Mastering the 6-digit NAICS code list is essential for effective federal business development. By aligning your capabilities with the correct codes, you ensure that you are competing in the right categories and accurately representing your small business status. Whether you are performing market research or preparing a proposal, leverage platforms like SamSearch to monitor which NAICS codes are trending in your industry, allowing you to position your firm for long-term success in the federal marketplace.

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