NAICS Codes
Federal NAICS Codes
for Government Contractors
122 NAICS deep-dives with the current SBA size standard, FY2025 federal obligations, and the agencies actually buying under each code.
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Federal spending by NAICS (FY2025)
The 20 NAICS codes that absorbed the most federal contract obligations in FY2025, out of 120 codes tracked.
FY2025 federal contract obligations, USAspending.gov
Federal IT and services codes
Commercial Building Construction
Construction services for government buildings, facilities, and infrastructure.
Highway, Street, and Bridge Construction
Construction and infrastructure work for federal transportation systems.
Electrical Installation
Electrical installation and infrastructure services for government facilities.
Electronic Computers Manufacturing
Computer hardware manufacturing, including government and commercial systems.
Computer Peripheral Equipment and Software Co-Development Manufacturing
Manufacturing of computer peripherals, storage systems, and related equipment for government use.
Telephone Apparatus Manufacturing
Manufacturing of telephone, communications, and related equipment for government.
Other Electronic Component Manufacturing
Manufacturing of electronic components and related equipment for government systems.
Audio and Video Equipment Manufacturing
Manufacturing of audio, video, and broadcast equipment for government use.
Printed Circuit Board Manufacturing
Manufacturing of printed circuit boards and assemblies for government systems.
Computer and Office Equipment Wholesale Distribution
Wholesale distribution of computer and office equipment to government agencies.
Other Electrical and Electronic Equipment Wholesale Distribution
Wholesale distribution of specialized electrical and electronic equipment for government.
Software Publishers
Prepackaged software development and publishing for government and commercial markets.
Wired Telecommunications Carriers
Telecommunications infrastructure and services for government and commercial customers.
Other Telecommunications Services
Specialized telecommunications services not otherwise classified.
Data Processing, Hosting, and Related Services
Data processing, hosting, and cloud services for government and commercial customers.
Internet Publishing and Broadcasting and Web Search Portals
Internet publishing, web portals, and digital content services for government and commercial use.
All Other Information Services
Information services not otherwise classified, including data analytics and knowledge services.
Engineering Services
Engineering design and consulting services, including software and systems engineering.
Custom Computer Programming Services
Meta description for custom software development services sold to federal government.
Software Application Development Services
Software application development and maintenance services for government agencies.
Systems Integration Design Services
Systems integration and enterprise architecture design services for federal government systems.
Other Computer-Related Services
Other computer and IT services not classified elsewhere, including IT consulting and support.
Other Professional Services
Professional services not classified elsewhere, including business and strategy consulting.
Research and Development in Information Technology
Research and development services focused on information technology and computing.
All Other Professional, Scientific, and Technical Services
Professional and technical services not classified elsewhere.
Facilities Support Services
Facilities and infrastructure support services for government buildings and operations.
Temporary Help Services
IT staffing and temporary professional services for federal agencies.
All Other Professional Employment Services
Professional employment and staffing services not otherwise classified.
Computer and Information Systems Training
Computer and IT training services for government employees and contractors.
Professional and Management Development Training
Professional development, leadership, and management training for federal employees.
All NAICS deep-dives
92 more codes across manufacturing, construction, research, logistics, and professional services.
- 331410Nonferrous Metal (except Aluminum) Smelting and Refining
- 331491Nonferrous Metal (except Copper and Aluminum) Rolling, Drawing, and Extruding
- 332410Power Boiler and Heat Exchanger Manufacturing
- 332510Hardware Manufacturing
- 332722Bolt, Nut, Screw, Rivet, and Washer Manufacturing
- 332911Industrial Valve Manufacturing
- 332992Small Arms Ammunition Manufacturing
- 332993Ammunition (except Small Arms) Manufacturing
- 332994Small Arms, Ordnance, and Ordnance Accessories Manufacturing
- 332999All Other Miscellaneous Fabricated Metal Product Manufacturing
- 333120Construction Machinery Manufacturing
- 333310Commercial and Service Industry Machinery Manufacturing
- 333415Air-Conditioning and Warm Air Heating Equipment and Commercial and Industrial Refrigeration Equipment Manufacturing
- 333613Mechanical Power Transmission Equipment Manufacturing
- 333618Other Engine Equipment Manufacturing
- 333998All Other Miscellaneous General Purpose Machinery Manufacturing
- 334220Radio and Television Broadcasting and Wireless Communications Equipment Manufacturing
- 334419Other Electronic Component Manufacturing
- 334510Electromedical and Electrotherapeutic Apparatus Manufacturing
- 334511Search, Detection, Navigation, Guidance, Aeronautical, and Nautical System and Instrument Manufacturing
- 334515Instrument Manufacturing for Measuring and Testing Electricity and Electrical Signals
- 334516Analytical Laboratory Instrument Manufacturing
- 334517Irradiation Apparatus Manufacturing
- 334519Other Measuring and Controlling Device Manufacturing
- 335311Power, Distribution, and Specialty Transformer Manufacturing
- 335999All Other Miscellaneous Electrical Equipment and Component Manufacturing
- 336110Automobile and Light Duty Motor Vehicle Manufacturing
- 336120Heavy Duty Truck Manufacturing
- 336211Motor Vehicle Body Manufacturing
- 336212Truck Trailer Manufacturing
- 336350Motor Vehicle Transmission and Power Train Parts Manufacturing
- 336411Aircraft Manufacturing
- 336412Aircraft Engine and Engine Parts Manufacturing
- 336413Other Aircraft Parts and Auxiliary Equipment Manufacturing
- 336414Guided Missile and Space Vehicle Manufacturing
- 336415Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing
- 336419Other Guided Missile and Space Vehicle Parts and Auxiliary Equipment Manufacturing
- 336611Ship Building and Repairing
- 336612Boat Building
- 336992Military Armored Vehicle, Tank, and Tank Component Manufacturing
- 337214Office Furniture (except Wood) Manufacturing
- 339112Surgical and Medical Instrument Manufacturing
- 339113Surgical Appliance and Supplies Manufacturing
- 339999All Other Miscellaneous Manufacturing
- 513210Software Publishers
- 516210Media Streaming Distribution Services, Social Networks, and Other Media Networks and Content Providers
- 517112Wireless Telecommunications Carriers (except Satellite)
- 517410Satellite Telecommunications
- 517810All Other Telecommunications
- 519290Web Search Portals and All Other Information Services
- 541110Offices of Lawyers
- 541199All Other Legal Services
- 541211Offices of Certified Public Accountants
- 541219Other Accounting Services
- 541310Architectural Services
- 541370Surveying and Mapping (except Geophysical) Services
- 541380Testing Laboratories and Services
- 541611Administrative Management and General Management Consulting Services
- 541612Human Resources Consulting Services
- 541613Marketing Consulting Services
- 541614Process, Physical Distribution, and Logistics Consulting Services
- 541618Other Management Consulting Services
- 541620Environmental Consulting Services
- 541713Research and Development in Nanotechnology
- 541714Research and Development in Biotechnology (except Nanobiotechnology)
- 541720Research and Development in the Social Sciences and Humanities
- 541810Advertising Agencies
- 541930Translation and Interpretation Services
- 561110Office Administrative Services
- 561422Telemarketing Bureaus and Other Contact Centers
- 561599All Other Travel Arrangement and Reservation Services
- 561611Investigation and Personal Background Check Services
- 561612Security Guards and Patrol Services
- 561621Security Systems Services (except Locksmiths)
- 561720Janitorial Services
- 561730Landscaping Services
- 561990All Other Support Services
- 562111Solid Waste Collection
- 562119Other Waste Collection
- 562211Hazardous Waste Treatment and Disposal
- 562910Remediation Services
- 562998All Other Miscellaneous Waste Management Services
- 611310Colleges, Universities, and Professional Schools
- 611512Flight Training
- 611519Other Technical and Trade Schools
- 611710Educational Support Services
- 621511Medical Laboratories
- 621910Ambulance Services
- 621999All Other Miscellaneous Ambulatory Health Care Services
- 811111General Automotive Repair
- 811210Electronic and Precision Equipment Repair and Maintenance
- 811310Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
Understanding NAICS Codes
NAICS (North American Industry Classification System) codes are how the federal government classifies your business by industry. Your NAICS code determines your SBA size standard (the revenue threshold for being classified as a small business) and affects which federal contracts you're eligible for.
Unlike the federal FAR or agency-specific procurement rules, NAICS codes are standardized across all government procurement. When you register in SAM.gov, you select your primary NAICS code and up to four additional secondary codes.
Federal procurement officers search for vendors by NAICS code. Choosing the right codes directly affects your visibility: if you're classified under the wrong code, agencies won't find you when searching for your services.
Size standards vary widely, and they are not all measured the same way. Custom Computer Programming Services (541511) is $34 million, Engineering Services (541330) is $25.5 million, and Aircraft Manufacturing (336411) is 1,500 employees. Receipts standards are averaged over five fiscal years, employee standards over the last 24 months. Every figure on this site comes from the sba table effective march 2023.
The government also codes what it is buying, separately from who it buys from. That is the product service code, and searching opportunities by NAICS alone will miss work filed under a PSC you never watch.
Classify Your Business Correctly
Your NAICS code determines your size standard, visibility to federal buyers, and eligibility for set-asides. Get it right to maximize your federal contracting opportunities.
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