Skip to content
Log in Apply
NAICS 561621, industry

NAICS 561621: Security systems services (except locksmiths)

NAICS 561621 is the industry code for security systems services (except locksmiths). Use it on loan applications, tax forms and registrations. Explore financing for professional services and start your application when you are ready.

Apply for funding with AI

What 561621 covers

These businesses sell, install, service and monitor security, fire alarm and access control systems. Alarm monitoring companies and integrators that install cameras, access control and intrusion systems fit here.

Included in this code

  • Burglar and fire alarm installation
  • Alarm monitoring
  • Video surveillance installation
  • Access control systems
  • Security system service and repair

Not this code

Businesses that use 561621

Alarm monitoring companyCommercial security integratorResidential alarm dealer

Financing for this trade

Alarm companies borrow against recurring monthly revenue with RMR based acquisition loans, equipment financing for inventory and vehicles, and SBA 7(a) loans to buy accounts. Lenders look at recurring monitoring revenue, attrition, licensing and contract terms.

Apply for funding with AI

Is 561621 the right code for a security system or alarm company?

Yes, if you install, service or monitor security, fire alarm, camera or access control systems. If you mainly rekey locks and open doors, use 561622. Electrical contractors doing general wiring use 238210 even if they install some low voltage systems.

What is the SBA size standard for 561621?

SBA sets the size standard for 561621 at $25 million in average annual receipts, averaged over the last five completed fiscal years and counting affiliates. Security systems service firms at or under that figure qualify as small businesses for SBA 7(a) and 504 loans and for federal small business set asides. Most independent security systems service firms fall well inside the limit, so size is rarely what decides an SBA application.

What financing do alarm companies use?

Alarm dealers often borrow against recurring monthly monitoring revenue to buy accounts, using RMR based loans or SBA 7(a) loans. Vehicle and equipment loans cover service vans and inventory. Lenders look at attrition rates, contract length and licensing. Monitoring centers can also be financed with equipment loans.

What does NAICS 561621 cover?

Security systems services (except locksmiths). Industry level code in NAICS 2022, under 56 Administrative and support and waste management and remediation services, 561 Administrative and support services, 5616 Investigation and security services, 56162 Security systems services.

What financing do NAICS 561621 businesses use?

Equipment financing, working capital, SBA loans and invoice factoring are the products placed most for professional services businesses. Start an application and the AI matches the deal to lenders that fund this code.

Where do I put NAICS 561621?

On the SBA loan application, on federal Schedule C or Form 1120, on SAM.gov and state registrations, and on most lender applications. A business can report more than one code; use this one if it describes what produces most of your revenue.