NAICS 561611: Investigation and Personal Background Check Services
Investigation and Personal Background Check Services is NAICS code 561611. A business is small under it with $25 million or less in average annual receipts. 3 federal contracts are open on SAM.gov under this code right now.
- SBA size standard
- $25 million or less in average annual receipts
- Open contracts now
- 3
- Federal spending, FY2026
- $914.8 million
- Share won by small businesses
- 32%
- Small businesses registered
- 2,174
Open federal contracts for investigation and personal background check services
- USPS EEO Final Agency Decision Services - September 2026 Solicitation
Due in 26 daysOct 30, 2026
- Field, Background-Investigative Services
Due in 1350 daysJun 15, 2030
- Field, Background-Investigative Services (Multiple Award)
Due in 1350 daysJun 15, 2030
What NAICS 561611 covers
The Census Bureau's NAICS index lists these kinds of work under 561611:
- Background check services
- Bounty hunting services
- Detective agencies
- Fingerprint services
- Investigation services (except credit), private
- Investigators, private
- Lie detection services
- Missing person tracing services
- Polygraph services
- Private detective services
- Private investigation services (except credit)
- Skip tracing services
Read the full definition, including what's excluded, on census.gov.
SBA size standard for 561611
To count as a small business for a contract assigned NAICS 561611, your business must have $25 million or less in average annual receipts. Receipts are averaged over your last five completed fiscal years.
From SBA's table of size standards, effective Mar 17, 2023. Confirm it with SBA's size standards tool before you certify your size.
Who buys investigation and personal background check services
Agencies that awarded the most under NAICS 561611 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Defense Counterintelligence and Security Agency | $1.4 billion |
| U.S. Immigration and Customs Enforcement | $259.8 million |
| U.S. Customs and Border Protection | $204 million |
| Social Security Administration | $77.3 million |
| Federal Bureau of Investigation | $75.8 million |
| Bureau of Alcohol, Tobacco, Firearms and Explosives Acquisition and Property Management Division | $42.3 million |
| Drug Enforcement Administration | $42 million |
| Office of the Assistant Secretary for Administration | $40.8 million |
Open notices right now come from Department of Justice (2) and Postal Service (1).
Set-asides on open 561611 contracts
- Total small business set-aside: 2
- No set-aside (full and open): 1
Not sure which set-asides you qualify for? Try the free SBA certification screener, or read set-aside contracts, explained.
Your competition
2,174 businesses with active SAM.gov registrations are rated small under NAICS 561611, most of them in Virginia (259), Texas (237), Florida (236), California (159) and Maryland (155). Look any of them up with the free CAGE code and UEI lookup.
Federal spending under 561611 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $727.5 million |
| FY2025 | $852.4 million |
| FY2026 | $914.8 million |
| FY2027 (so far) | $23,820 |
Source: USAspending.gov, all contract awards with this NAICS code. Fiscal years start October 1.
Related NAICS codes
- 561612 Security Guards and Patrol Services
- 561613 Armored Car Services
- 561621 Security Systems Services (except Locksmiths)
- 561622 Locksmiths
Frequently asked questions
What is NAICS code 561611?
561611 is the 2022 NAICS code for Investigation and Personal Background Check Services. The Census Bureau's index lists work such as background check services, bounty hunting services, detective agencies under it. Federal contracting uses the 2022 codes.
What is the SBA size standard for NAICS 561611?
$25 million or less in average annual receipts. A business at or under that is small for contracts assigned this code. The current SBA table took effect Mar 17, 2023.
Are there government contracts for investigation and personal background check services?
Yes. 3 federal contract opportunities under NAICS 561611 are open on SAM.gov right now. Agencies obligated about $914.8 million under this code in fiscal year 2026, according to USAspending.gov.
How do I add NAICS code 561611 to my SAM.gov registration?
Update your entity registration on SAM.gov and add the code on the Goods and Services page, in the Assertions section. You can list several NAICS codes and mark one as your primary. Changes are free.
Keep going
- Search other NAICS codes by keyword or company
- How to choose NAICS codes for government contracts
- NAICS codes with the most open federal contracts
FedReady is an independent company, not affiliated with SBA, SAM.gov, the Census Bureau or any government agency. Open-contract counts come from SAM.gov and update daily; spending figures come from USAspending.gov.