NAICS — the North American Industry Classification System — is the standard used by the US federal government to classify businesses by economic activity. Updated every five years, the current 2022 NAICS includes significant changes from the 2017 edition, particularly in retail categories. Understanding your correct NAICS code affects SBA loan eligibility, government contract bidding, licensing requirements, and statistical reporting.
How the 6-digit code works. NAICS codes are hierarchical. The first two digits identify the broad economic sector (e.g., 44-45 for Retail Trade, 62 for Health Care). Digits 3 and 4 narrow to the subsector and industry group. The fifth digit identifies the NAICS industry. The sixth digit — unique to each country — defines the national industry. The 6-digit code is the most specific and the one required for most federal applications.
2022 NAICS changes that affect small businesses. The 2022 revision substantially reorganized retail trade categories. The biggest change affecting small operators: vending machine businesses moved from 454210 (Vending Machine Operators, 2017) to 445132 (Vending Machine Operators, 2022) under the new food and beverage retail subsector. If you filed SBA paperwork before 2022, your old code may no longer match current databases — verify before applying for new financing or contracts.
NAICS vs. SIC codes. SIC (Standard Industrial Classification) is the legacy system NAICS replaced in 1997. Most federal agencies — the SBA, Census Bureau, Bureau of Labor Statistics, and most contracting databases — now use NAICS exclusively. However, some state licensing agencies, insurance underwriters, and older industry databases still reference SIC. If asked for both, your primary NAICS code is always the authoritative one for federal purposes.
NAICS and SBA size standards. The SBA uses NAICS codes to determine whether a business qualifies as "small" for loan programs and set-aside contracts. Each NAICS code has its own size standard — expressed as either maximum annual revenue or maximum number of employees. A business classified under one NAICS code might qualify as small; the same business under a different code might not. Choosing the correct primary NAICS code matters significantly for SBA eligibility.
Government contracting and SAM.gov. Federal government contractors must register in SAM.gov with their NAICS codes. You can list multiple codes if your business operates across industries, but one is designated as primary. NAICS codes also determine which set-aside contracts you're eligible to bid — 8(a), HUBZone, WOSB, and SDVOSB programs all evaluate eligibility partly based on NAICS classification and associated size standards. Review your SAM.gov profile annually to ensure your codes reflect your current business activities.