NAICS Code 561611: Investigation and Personal Background Check Services
NAICS code 561611 is the industry for investigation and personal background check services in the Administrative and Support and Waste Management and Remediation Services sector. Agencies tag every federal contract with a NAICS code, so this is the code to list in your SAM.gov registration and to search for bids.
Government contracts under NAICS 561611
Federal agencies obligated $2.5B on contracts under NAICS 561611 from FY2024 to FY2026, including $918M in FY2026. The biggest buyers were the Department of Defense, the Department of Homeland Security, the Department of Justice. The largest contractors were CACI, Inc. - Federal, Peraton Risk Decision Inc., Asrc Federal Professional Services, LLC.
See the full breakdown: government investigation and personal background check services contracts, who wins and who buys.
Open government bids for NAICS 561611
No open bids under NAICS 561611 right now. Check the open bids page, which is updated daily from SAM.gov.
Small business size standard for NAICS 561611
To bid on small business set-aside contracts under NAICS 561611, your business must be small under the SBA size standard for this code, measured either by average annual receipts or by number of employees. The values are updated periodically, so check the current SBA table of size standards before you bid.
Other NAICS codes in 5616
How to choose the right NAICS code
Pick the 6-digit code that best describes what you sell. List it as your primary code in SAM.gov, and add other codes for related work. Agencies choose one NAICS code for each contract, so check the codes on past awards for the kind of work you do. Search all codes in the NAICS code lookup.
Related guides
Frequently asked questions
- What is NAICS code 561611?
- NAICS 561611 is the industry "Investigation and Personal Background Check Services" in the North American Industry Classification System, part of the Administrative and Support and Waste Management and Remediation Services sector (56).
- What is the size standard for NAICS 561611?
- The SBA sets a small business size standard for each NAICS code, either average annual receipts or number of employees. Check the current value for 561611 in the SBA table of size standards on sba.gov; it changes from time to time.
- Are there government contracts for NAICS 561611?
- Yes. Federal agencies obligated $2.5B on contracts under NAICS 561611 from FY2024 to FY2026.