Answer
What is a NAICS code and how do I choose one?
A NAICS code classifies your industry. Choose the codes that best describe what your business does - they determine which opportunities you match and whether you qualify as a small business.
NAICS (North American Industry Classification System) codes describe industries. Every federal solicitation has a primary NAICS code, and each code carries an SBA size standard (a revenue or employee cap) that defines 'small' for that work.
Pick the codes that genuinely match your offerings - you can list several. Your primary NAICS in SAM.gov signals your core business. Choosing accurately matters: it drives which opportunities you're matched to and whether you can compete for small-business set-asides.
Browse the full NAICS directory to find your codes, then see which agencies buy under them.
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