How to Find Your NAICS Code (2026)
To find your NAICS code, search the NAICS index for the words that describe what you actually sell, choose the six-digit code that best fits as your primary, add secondary codes for everything else you do, and check the SBA size standard tied to each. Your NAICS codes drive which opportunities and set-asides you qualify for.
- 1
Understand what a NAICS code is
A NAICS code is a six-digit number classifying your industry. In contracting it determines which opportunities fit and the SBA size standard (revenue or employee cap) that defines whether you’re "small."
- 2
Search the NAICS index
Search by the plain words for what you do (e.g. "janitorial", "software", "engineering") at the U.S. Census NAICS site, or use SAM.gov Hunter’s built-in picker, which carries the complete set of NAICS 2022 six-digit codes.
- 3
Pick your primary code
Choose the single code that best represents your main line of business as your primary NAICS — it’s the one buyers will most associate with you.
- 4
Add secondary codes
List additional NAICS codes for every other type of work you genuinely perform, so you appear for all of it. You can register multiple codes in your SAM.gov registration.
- 5
Check the size standard for each code
Look up the SBA size standard for each NAICS code — because standards differ, the same firm can be small under one code and large under another. This affects which set-asides you can win.
Know your codes? Search every opportunity in your NAICS across federal and state agencies — free.
Search by NAICS →Frequently asked questions
Can I have more than one NAICS code?
Yes. You pick one primary NAICS code for your main line of business and can add as many secondary codes as accurately describe the work you do, so you’re discoverable for all of it.
Where do I officially set my NAICS codes?
In your SAM.gov entity registration. You can update your primary and secondary NAICS codes there at any time; the codes also feed how opportunities are matched to your business.