NAICS Code 541380 — Testing Laboratories and Services

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 54138 (Testing Laboratories and Services).

Code	541380
Title	Testing Laboratories and Services
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	$19 million in average annual receipts

Official definition (2022 NAICS)

This industry comprises establishments primarily engaged in performing physical, chemical, and other analytical testing services, such as acoustics or vibration testing, assaying, biological testing (except medical and veterinary), calibration testing, electrical and electronic testing, geotechnical testing, mechanical testing, nondestructive testing, or thermal testing. The testing may occur in a laboratory or on-site.

Is a business under 541380 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 541380 qualifies as a small business if it does not exceed $19 million in average annual receipts. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — receipts are averaged over the latest 5 fiscal years.

Where 541380 sits in the hierarchy

Level	Code	Title
Sector	54	Professional, Scientific, and Technical Services
Subsector	541	Professional, Scientific, and Technical Services
Industry Group	5413	Architectural, Engineering, and Related Services
NAICS Industry	54138	Testing Laboratories and Services
National Industry	541380	Testing Laboratories and Services

No direct SIC mapping is shown for this code: it was introduced or redefined after the official 1987 SIC ↔ 2002 NAICS concordance. Use the crosswalk tool to explore related legacy codes.

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.