2022 NAICS national industry in sector 56 Administrative and Support and Waste Management and Remediation Services
561330 Professional Employer Organizations
NAICS 561330 is the US industry code for professional employer organizations. It covers establishments primarily engaged in providing human resources and human resource management services to client businesses and households.
- Code
- 561330 (2022 NAICS)
- Title
- Professional Employer Organizations
- Part of
- Employment Services
- SBA small business limit
- Average annual receipts up to $41.5 million
- Closest UK SIC
- 78300 (details)
Changes coming. The NAICS 2027 revision applies to data from 1 January 2027, and SBA proposed new size standards on 20 August 2026. The values on this page are the ones in force today; we update this page when the official files change.
Official definition
This industry comprises establishments primarily engaged in providing human resources and human resource management services to client businesses and households. Establishments in this industry operate in a co-employment relationship with client businesses or organizations and are specialized in performing a wide range of human resource and personnel management duties, such as payroll, payroll tax, benefits administration, workers' compensation, unemployment, and human resource administration. Professional employer organizations (PEOs) are responsible for payroll, including withholding and remitting employment-related taxes, for some or all of the employees of their clients, and also serve as the employer of those employees for benefits and related purposes.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Supplying their own employees for limited periods of time to supplement the working force of a client's business are classified in Industry 561320, Temporary Help Services.
- Listing employment vacancies and referring or placing applicants for employment are classified in U.S. Industry 561311, Employment Placement Agencies.
Businesses that use this code
Activities listed under 561330
The Census index assigns these 6 activities to this code. If your business matches one, this is your code.
- Co-employment staffing services
- Employee leasing services
- Labor leasing services
- PEO (professional employer organizations)
- Professional employer organizations (PEO)
- Staff leasing services
SBA size standard for 561330
To count as a small business for SBA loans and federal contracts under NAICS 561330, your business (including affiliates) must not exceed $41.5 million in average annual receipts. Check your business.
Source: SBA table of size standards, effective March 17, 2023.
Closest UK SIC 2007 codes
There is no official one-to-one link between NAICS and UK SIC. These codes share the same international class (ISIC Rev. 4: 7830), so treat them as a starting point and check the definition.
Built from Census concordances 2022→2017 NAICS and 2017 NAICS→ISIC Rev. 4.
Similar codes to compare
Data last changed November 14, 2026. How this page is built.