561621

Analysis

NAICS 561621 is the 2022 national industry for security systems services (except locksmiths), part of 56162 (Security Systems Services). Census lists 8 example activities under it in the official index.

By establishments it ranks 1st of the 2 codes at this level within Security Systems Services, with 64.4% of them.

County Business Patterns counts 7,151 US establishments in this code in 2023, employing 128,462 people at an average annual payroll of $70,074 per employee (52nd percentile of national industries). 48% of the establishments have fewer than five employees, which is close to the national mix.

Its index entries, the activities Census uses to assign businesses to this code, include alarm system monitoring services, alarm systems sales combined with installation, repair, or…, burglar alarm monitoring services and burglar alarm sales combined with installation, repair, or…, among 8 in all.

Census lists 3 related activities that belong elsewhere, most often in 42, 238210 and 441330. Businesses that do several things are classified by their primary activity, the one that generates the most value, so check those boundaries before settling on this code.

For example, selling security alarm systems for buildings, without installation, repair, or monitoring services are classified in 42 (Wholesale Trade, or Sector 44-45, Retail Trade) instead.