541380

Testing Laboratories and Services

Professional, Scientific, and Technical Services › Professional, Scientific, and Technical Services › Architectural, Engineering, and Related Services

SBA Size Standard

$19M average annual receipts

Revenue-Based Verify at SBA.gov →

NAICS Code Hierarchy

54

Sector

Professional, Scientific, and Technical Services

541

Subsector

Professional, Scientific, and Technical Services

5413

Industry Group

Architectural, Engineering, and Related Services

541380

National Industry (This Code)

Testing Laboratories and Services

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
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.

✓ Small Business Eligibility at a Glance

Based on SBA Table of Small Business Size Standards (2024)

Size Standard

$19M average annual receipts

Measurement Period

3-year average

Standard Type

Revenue-Based

Applies To

All contracts under NAICS 541380

Set-Aside Programs

8(a), WOSB, HUBZone, SDVOSB

Certification Required

No (self-certify in SAM.gov)

Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.

Cross-References

The following activities are classified elsewhere in the NAICS system:

Laboratory testing for the medical profession--are classified in Industry 62151, Medical and Diagnostic Laboratories;
Veterinary testing services--are classified in Industry 541940, Veterinary Services; and
Auto emissions testing--are classified in U.S. Industry 811198, All Other Automotive Repair and Maintenance.

How to Use NAICS 541380 in SAM.gov

NAICS code 541380Testing Laboratories and Services — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Architectural, Engineering, and Related Services space will be able to find your business.

If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of $19M average annual receipts, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 541380.

Log in Entity Registration Goods & Services Add NAICS Code Enter 541380 Save

Frequently Asked Questions

What is NAICS code 541380?

NAICS code 541380 is 'Testing Laboratories and Services', classified under the Professional, Scientific, and Technical Services sector (NAICS 54). This industry comprises establishments primarily engaged in performing physical, chemical, and other analytical testing services, such as acoustics or vibration testing, assaying, biological testing (

What is the SBA small business size standard for NAICS code 541380?

The SBA defines a small business under NAICS code 541380 (Testing Laboratories and Services) as one with $19M average annual receipts. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.

How do I register NAICS code 541380 in SAM.gov?

To register NAICS code 541380 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 541380 (Testing Laboratories and Services) to your NAICS code list. You may designate one code as your Primary NAICS code.

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Related NAICS Codes

Other codes in Architectural, Engineering, and Related Services

Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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