NAICS and PSC codes

Agencies classify purchases using NAICS (industry) and PSC/FSC (product/service) codes. Getting these right makes search, Scout, and SAM.gov registration work in your favor.

NAICS codes

NAICS describes what industry you operate in. Examples:

Code	Industry
541512	Computer Systems Design Services
236220	Commercial and Institutional Building Construction
561720	Janitorial Services
541330	Engineering Services

You list NAICS codes on SAM.gov. Agencies attach NAICS to solicitations and apply SBA size standards to determine small business eligibility for each code.

PSC / FSC codes

PSC (Product Service Code) and FSC (Federal Supply Class) describe what is being bought:

Code family	Examples
R	Professional, administrative, and management support
D	IT and telecom services
J	Maintenance, repair, and rebuilding of equipment
Y	Construction of structures and facilities

Use PSC to narrow searches when NAICS alone is too broad.

Browse codes in Civic AI

Civic AI publishes searchable reference tables for the classification systems used on federal contracts:

System	Browse page	What it covers
NAICS	classifications/naics	~1,400 active 6-digit industry codes with titles
PSC	classifications/psc	Product and service codes from the GSA PSC manual
Supply Classes (FSG)	classifications/fsg	2-digit Federal Supply Groups with family + active-parts counts
Set-Asides	classifications/setaside	SAM.gov set-aside programs with FAR citations + active solicitation counts
NIA	classifications/nia	National Interest Actions (historical; FPDS field retired 2024)
NSN	classifications/nsn	Defense National Stock Numbers from DIBBS / DLA FLIS

Open the Classifications hub to search by name or code. Each code links to related opportunities in Search. These pages are public and indexed in the site sitemap.

Using codes in Civic AI

You do not need to memorize codes to search — plain English works. But codes help when you:

Build saved searches — combine agency name + NAICS keyword
Validate fit — compare solicitation NAICS to your SAM profile
Size markets — filter awards by NAICS to see spend concentration

Example queries:

“Open solicitations NAICS 541512 — federal”
“Construction awards PSC Y1ZZ — Texas”