Registry · NAICS Index · Sector 56

561990 — All Other Support Services

NAICS 561990 is 'All Other Support Services', a 2022 U.S. national industry under Sector 56 (Administrative and Support and Waste Management and Remediation Services); the SBA small-business size standard is $16,500,000 (defined under 13 CFR § 121.201).

Description

This industry comprises establishments primarily engaged in providing day-to-day business and other organizational support services (except office administrative services, facilities support services, employment services, business support services, travel arrangement and reservation services, security and investigation services, services to buildings and other structures, packaging and labeling services, and convention and trade show organizing services) (as defined in the official U.S. Census Bureau 2022 NAICS Manual).

Illustrative Examples

  • Bartering services
  • Flagging (i.e., traffic control) services
  • Bottle exchanges
  • Float decorating services
  • Inventory taking services
  • Contract meter reading services
  • Lumber grading services
  • Diving services on a contract or fee basis

Exclusions & Cross-References

  • Providing office administrative services--are classified in Industry 561110, Office Administrative Services;
  • Providing facilities support services--are classified in Industry 561210, Facilities Support Services;
  • Providing employment services--are classified in Industry Group 5613, Employment Services;
  • Providing business support services--are classified in Industry Group 5614, Business Support Services;
  • Providing travel arrangement and reservation services--are classified in Industry Group 5615, Travel
  • Arrangement and Reservation Services;
  • Providing security and investigation services--are classified in Industry Group 5616, Investigation and
  • Security Services;
  • Providing services to buildings and other structures--are classified in Industry Group 5617, Services to
  • Buildings and Dwellings;
  • Providing packaging and labeling services--are classified in Industry 561910, Packaging and Labeling
  • Services;

Overview Facts

NAICS Structure: 561990 National Industry
Sector (2)
56
Administrative and Support and Waste Management and Remediation Services
Subsector (3)
561
Administrative and Support Services
Industry Group (4)
5619
Other Support Services
Industry (5)
56199
All Other Support Services
National Industry (6)
561990
All Other Support Services

Legacy SIC Concordance

Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.

Suggested Product Service Codes (Advisory)

The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.

  • PSC R499 — Other Professional Services

Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)

Frequently Asked Questions (FAQ)

Is NAICS code 561990 valid in 2022? ▾

Yes, 561990 is a valid 6-digit 2022 NAICS national industry code representing 'All Other Support Services' under Sector 56 in the official classification index.

What is the SBA size standard for NAICS code 561990? ▾

The Small Business Administration (SBA) has established a small business size standard of $16,500,000 for NAICS code 561990 (All Other Support Services), calculated based on receipts.

What is the legacy SIC equivalent for NAICS 561990? ▾

According to official Census Bureau concordance tables, NAICS code 561990 (All Other Support Services) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 7389 - Business Services.

Related Pages & Tools

Further regulatory reference links for NAICS code 561990: