NAICS code 561621: Security Systems Services (except Locksmiths)

NAICS 561621 is “Security Systems Services (except Locksmiths)”. This U.S. industry comprises establishments primarily engaged in (1) selling security alarm systems, such as burglar and fire alarms, along with installation, repair, or monitoring services or (2) remote monitoring of electronic security alarm systems.

Examples from the U.S. Census Bureau: Alarm system monitoring services; Alarm systems sales combined with installation, repair, or monitoring services; Burglar alarm monitoring services; Burglar alarm sales combined with installation, repair, or monitoring services; Fire alarm monitoring services; and Fire alarm sales combined with installation, repair, or monitoring services.

Businesses mainly selling security alarm systems for buildings, without installation, repair, or monitoring services are classified in Sector 42, Wholesale Trade, or Sector 44-45, Retail Trade; installing alarm systems (e.g., fire, burglar), without selling or monitoring services are classified in Industry 238210, Electrical Contractors and Other Wiring Installation Contractors; and retailing motor vehicle security systems, with or without installation or repair services are classified in Industry 441330, Automotive Parts and Accessories Retailers.

$25 million average annual receipts (average of the last five fiscal years), including affiliates. Source: 13 CFR 121.201, effective March 17, 2023.

SIC 7382 (Security Systems Services), from the U.S. Census Bureau concordances (1987 SIC → 2002 NAICS, carried to 2022 NAICS).

561600 (Investigation & security services) on Schedule C, line B, from the IRS list of principal business codes. The IRS code covers NAICS 561611–561622.

Federal agencies put a NAICS code on each solicitation in SAM.gov, and some states and cities use NAICS codes too. Add 561621 to your SAM.gov registration and to your bid alerts; PublicBeam emails new bids for the codes you choose every morning.