NAICS Codes for Federal Contracting
The code a contracting officer assigns to a solicitation sets your small business size standard. Here is what each of the most-used codes covers.
541511Custom Computer Programming Services$34.0 million average annual receipts541512Computer Systems Design Services$34.0 million average annual receipts541519Other Computer Related Services$34.0 million average annual receipts541611Administrative Management and General Management Consulting Services$24.5 million average annual receipts541330Engineering Services$25.5 million average annual receipts (higher for certain military and marine work)236220Commercial and Institutional Building Construction$45.0 million average annual receipts237310Highway, Street, and Bridge Construction$45.0 million average annual receipts238220Plumbing, Heating, and Air-Conditioning Contractors$19.0 million average annual receipts561210Facilities Support Services$47.0 million average annual receipts561720Janitorial Services$22.0 million average annual receipts561320Temporary Help Services$34.0 million average annual receipts541690Other Scientific and Technical Consulting Services$19.0 million average annual receipts541620Environmental Consulting Services$19.0 million average annual receipts562910Remediation Services$25.0 million average annual receipts (with exceptions)336411Aircraft Manufacturing1,500 employees336413Other Aircraft Parts and Auxiliary Equipment Manufacturing1,250 employees332710Machine Shops500 employees517111Wired Telecommunications Carriers1,500 employees518210Computing Infrastructure Providers, Data Processing, Web Hosting$40.0 million average annual receipts611430Professional and Management Development Training$16.5 million average annual receipts621111Offices of Physicians (except Mental Health Specialists)$16.0 million average annual receipts541715Research and Development in the Physical, Engineering, and Life Sciences1,000 employees (varies by exception)488510Freight Transportation Arrangement$25.0 million average annual receipts493110General Warehousing and Storage$41.5 million average annual receipts
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