By Outrider Editorial Team · Updated August 20, 2026
Official definition
This industry comprises establishments primarily engaged in the repair and maintenance of commercial and industrial machinery and equipment. Establishments in this industry either sharpen/install commercial and industrial machinery blades and saws or provide welding (e.g., automotive, general) repair services; or repair agricultural and other heavy and industrial machinery and equipment (e.g., forklifts and other material handling equipment, machine tools, commercial refrigeration equipment, construction equipment, and mining machinery).
FY2025 obligations
$765.5M
Contract actions
6,707
IDVs
575
Top buying agencies
- Department of Defense$622.8M
- Department of Veterans Affairs$54.5M
- Department of Homeland Security$24.0M
- Department of the Interior$17.3M
- Department of the Treasury$13.2M
FY2025 federal contract obligations, USAspending.gov
NAICS 811310 obligated $765 million in FY2025 across 6,707 contract actions. DoD is $623 million, VA $55 million, DHS $24 million, Interior $17 million, Treasury $13 million. The average action is around $114,000, consistent with recurring service agreements at specific facilities, not large enterprise maintenance programs.
What belongs here
Repair and maintenance of commercial and industrial machinery and equipment, including welding repair, blade and saw sharpening and installation, and repair of agricultural, heavy, and industrial machinery.
- Electronic and precision equipment repair is 811210.
- Automotive repair is 811111.
- Manufacturing the machinery rather than servicing it is a machinery code such as 333120.
Competing in this code
575 IDVs against 6,707 actions with a $12.5 million size standard makes this one of the more genuinely small business friendly service codes in federal contracting. Local shops win here because the work is on site and response time matters. Two things separate winners: technicians who can pass installation access requirements, which is a real obstacle for a shop that has never done federal work, and the ability to hold a firm labor rate across a multi-year option period while parts prices move. Structuring the offer with labor and parts priced separately is standard practice and protects the margin.
Frequently Asked
NAICS 811310 questions, answered.
What is the SBA size standard for NAICS 811310?
SBA sets it at $12.5 million in average annual receipts, averaged over your last five completed fiscal years. Come in at or under that and you are small on every NAICS 811310 solicitation, including the set-asides.
Which agencies buy industrial machinery repair under NAICS 811310?
FY2025 obligations: DoD ($623 million), VA ($55 million), DHS ($24 million), Interior ($17 million), Treasury ($13 million). DoD's share is installation and depot equipment maintenance, and VA and Interior buy facility and field equipment service on the same local terms.
Is NAICS 811310 accessible to a local repair shop?
Yes. The $12.5 million size standard is one of the lowest in the repair sector, 575 IDVs cover 6,707 actions at an average near $114,000, and the work is performed on site where response time matters. Proximity to a federal facility is a genuine competitive advantage in this code.
What trips up first-time federal repair contractors?
Installation access for technicians, which requires vetting that a commercial shop has never had to arrange, and multi-year labor rate commitments made while parts prices move. Pricing labor and parts separately is standard federal practice and is what protects margin over an option period.
Register Under NAICS 811310
Classify your business correctly to maximize visibility to federal buyers and access small business set-asides.
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