The North American Industry Classification System (NAICS) is used by federal agencies to categorize contracts. Find the right code for your business to discover relevant opportunities on SAM.gov.
The North American Industry Classification System (NAICS) is the standard used by federal statistical agencies to classify business establishments. Every federal contract on SAM.gov is tagged with one or more NAICS codes, making it essential for contractors to know their codes when searching for opportunities.
NAICS codes are 6-digit numbers organized hierarchically: the first two digits represent the sector (e.g., 54 = Professional Services), the third digit represents the subsector, the fourth digit represents the industry group, the fifth digit represents the NAICS industry, and the sixth digit represents the national industry.
Choosing the right NAICS code is critical for government contractors. It determines which contracts you can bid on, which set-aside programs you qualify for, and how your business is classified in the System for Award Management (SAM). Many small businesses use multiple NAICS codes to capture opportunities across related industries.
When registering in SAM.gov, you will select the NAICS codes that best describe your business. Federal agencies use these codes when posting contract opportunities, so having the right codes ensures you see relevant solicitations. Use our directory above to find codes that match your products or services, then click through to see live contract opportunities for each code.