Search the most commonly used federal contracting NAICS codes by keyword or category. Each result shows the SBA small-business size standard so you can confirm eligibility before submitting a proposal.
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How to choose your primary NAICS code
Primary code drives size status. The code listed first in SAM.gov is what most agencies use. Choose the one generating the most revenue.
You can list multiple. Add every NAICS that legitimately describes your work.
Match the solicitation. Each solicitation specifies the NAICS the buyer assigned. Confirm you qualify as small under that specific code.
Size standards change. Always verify against the current SBA Table of Small Business Size Standards.
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Source: SBA Table of Small Business Size Standards