Industry Description
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.
Cross-References. Establishments primarily engaged in--
Business Examples
Common types of business activities within NAICS 561621 - Security Systems Services (except Locksmiths are:
- Burglar alarm sales combined with installation, repair, or monitoring services
- Security alarm systems sales combined with installation, repair, or monitoring services
- Alarm system monitoring services
- Fire alarm monitoring services
- Burglar alarm monitoring services
- Alarm systems sales combined with installation, repair, or monitoring services
- Fire alarm sales combined with installation, repair, or monitoring services
- Security system monitoring services
IBISWorld Industry Research Report
Security Alarm Services in the US (56162)
Revenue 2025
$38.6bn
Growth 2025
2.38%
Key Trends
Trends in residential and commercial real estate have a significant effect on this industry
Businesses and commercial clients account for more than half of all purchases in the Security Alarm Services industry
Despite high uncertainty in 2023, US GDP is expected to climb, contributing to industry growth
Products and Services
Similar Industries
For some business types, there may be a similar industry to 561621 - Security Systems Services (except Locksmiths that is a better classification match. Establishments primarily engaged in:
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NAICS Cross Reference
Retailing motor vehicle security systems, with or without installation or repair services--are classified in Industry 441310, Automotive Parts and Accessories Stores.
IBISWorld industry research report
NAICS Hierarchy 561621 - Security Systems Services (except Locksmiths
NAICS Code 561621 - Security Systems Services (except Locksmiths sits in the 2-digit Security Systems Services (except Locksmiths sector. NAICS codes can be 2- to 6-digits and the further along the hierarchy, the more detailed and specific the category will be. Learn more about the structure of NAICS codes
2 Digits: 56
Sector Title: Administrative and Support and Waste Management and Remediation Services
3 Digits 4 Digits 5 Digits 6 Digits
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5611 Office Administrative Services
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56111 Office Administrative Services
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5612 Facilities Support Services
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56121 Facilities Support Services
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5613 Employment Services
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56131 Employment Placement Agencies and Executive Search Services
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56132 Temporary Help Services
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56133 Professional Employer Organizations
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5614 Business Support Services
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56141 Document Preparation Services
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56142 Telephone Call Centers
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56143 Business Service Centers
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56144 Collection Agencies
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56145 Credit Bureaus
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56149 Other Business Support Services
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5615 Travel Arrangement and Reservation Services
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56151 Travel Agencies
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56152 Tour Operators
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56159 Other Travel Arrangement and Reservation Services
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5616 Investigation and Security Services
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56161 Investigation, Guard, and Armored Car Services
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56162 Security Systems Services
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5617 Services to Buildings and Dwellings
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56171 Exterminating and Pest Control Services
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56172 Janitorial Services
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56173 Landscaping Services
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56174 Carpet and Upholstery Cleaning Services
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56179 Other Services to Buildings and Dwellings
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5619 Other Support Services
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56191 Packaging and Labeling Services
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56192 Convention and Trade Show Organizers
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56199 All Other Support Services
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5621 Waste Collection
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56211 Waste Collection
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5622 Waste Treatment and Disposal
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5629 Remediation and Other Waste Management Services
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56291 Remediation Services
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56292 Materials Recovery Facilities
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56299 All Other Waste Management Services
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NAICS Resources
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