NAICS Code 561611 — Investigation and Personal Background Check Services
National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 3 national industries under 56161 (Investigation, Guard, and Armored Car Services).
| Code | 561611 |
|---|---|
| Title | Investigation and Personal Background Check Services |
| Level | National Industry (6-digit) |
| Edition | NAICS 2022 edition |
| SBA size standard | $25 million in average annual receipts |
Official definition (2022 NAICS)
This U.S. industry comprises establishments primarily engaged in providing investigation, detective, and personal background check services.
Illustrative Examples:
Fingerprint services
Private detective services
Polygraph services
Private investigative services (except credit)
Cross-References.
Is a business under 561611 "small"?
Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 561611 qualifies as a small business if it does not exceed $25 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 561611 sits in the hierarchy
| Level | Code | Title |
|---|---|---|
| Sector | 56 | Administrative and Support and Waste Management and Remediation Services |
| Subsector | 561 | Administrative and Support Services |
| Industry Group | 5616 | Investigation and Security Services |
| NAICS Industry | 56161 | Investigation, Guard, and Armored Car Services |
| National Industry | 561611 | Investigation and Personal Background Check 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.
Related National Industry codes
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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.