Industry · NAICS 56161

Investigation, Guard, and Armored Car Services

NAICS code
56161
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SBA size standard

There is no single size standard for NAICS 56161

NAICS 56161 (Investigation, Guard, and Armored Car Services) is a rollup of 3 more specific 6-digit codes, and the SBA sets a different size standard for each one under 13 CFR 121.201 (25-43 $M revenue across the group). Find your exact 6-digit code below to get the standard that actually applies to your business.

NAICS code Industry SBA size standard
561611 Investigation and Personal Background Check Services $25.0 million
561612 Security Guards and Patrol Services $29.0 million
561613 Armored Car Services $43.0 million

Source: SBA Table of Small Business Size Standards, effective 2023-03-17 (sba.gov/document/support-table-size-standards, the actual linked PDF, not the HTML landing page); cross-checked against the live eCFR XML for 13 CFR 121.201 (ecfr.gov/api/versioner) and the GovInfo official CFR annual edition (Title 13, revised as of 2025-01-01), both fetched 2026-07-27. Every 23-group child set was also checked against the Census Bureau's official 2022 NAICS structure file (census.gov/naics/2022NAICS/2022_NAICS_Structure.xlsx) for completeness.

Corporate buyers

Corporate supplier diversity programs in this industry

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Next step

Competing for contracts under NAICS 56161.

The certification quiz checks which supplier diversity programs qualify your business under this NAICS code. Federal programs: 8(a), HUBZone, WOSB, SDVOSB. Corporate programs: NMSDC MBE, WBENC WBE, NGLCC LGBTBE. The result orders the matches by which buyers active in this industry accept each one.

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Related codes under 5616
Data sources

NAICS code and title are from the U.S. Census Bureau North American Industry Classification System. SBA small-business size standards are from the U.S. Small Business Administration table of small business size standards. Corporate program data is editorial coverage by SupplierDiversity.com.