What's the NAICS and SIC code for a security guard company?
For a security guard company, use NAICS 561612 (Security Guards and Patrol Services) in the US and SIC 80100 (Private security activities) in the UK.
United States, NAICS 2022
561612 Security Guards and Patrol Services
Security Guards and Patrol Services.
SBA small business limit: $29 million average annual receipts.
United Kingdom, SIC 2007
80100 Private security activities
Private security activities, including security guard services.
Use this code when you register with Companies House or file your confirmation statement.
When a different code fits better
These are the codes most often confused with the main answer. Pick by the activity that earns most of your revenue.
| Code | Title | Use it if |
|---|---|---|
| NAICS 561621 | Security Systems Services (except Locksmiths) | you install and monitor alarm systems |
| NAICS 561611 | Investigation and Personal Background Check Services | you run private investigations |
| SIC 80200 | Security systems service activities | you install and monitor security systems |
| SIC 80300 | Investigation activities | you run investigations |
Good to know
Alarm monitoring is a separate code from guard services.
You can list more than one code. Companies House accepts up to four SIC codes, and SAM.gov lets you add several NAICS codes, with one marked as primary.
What the code affects
- SBA programs and federal contracts: your NAICS code sets the size limit you must stay under to count as small. Check your size.
- SAM.gov registration: contracting officers search by NAICS, so list every code you can deliver work under.
- Companies House: your SIC code appears on the public register and in your confirmation statement.
Codes checked against the US Census 2022 NAICS index and the ONS UK SIC 2007 index. Information only; confirm with the agency you file with.