SBA size standard
$12.5 million
Measured by average annual receipts over the last 5 fiscal years
SBA table effective March 2023
Official definition
This industry comprises establishments primarily engaged in providing a range of day-to-day office administrative services, such as financial planning; billing and recordkeeping; personnel; and physical distribution and logistics, for others on a contract or fee basis. These establishments do not provide operating staff to carry out the complete operations of a business.
FY2025 federal spending
The Department of Defense bought 49% of the $668.1M obligated under 561110 in FY2025.
- Contract awards
- 1,665
- Contract vehicles (IDVs)
- 148
Top buying agencies
- Department of Defense$326.1M
- Department of Homeland Security$137.3M
- National Aeronautics and Space Administration$76.2M
- Department of State$30.9M
- Department of Health and Human Services$22.6M
FY2025 federal contract obligations, USAspending.gov
NAICS 561110 obligated $668 million in FY2025 across 1,665 contract awards. DoD is $326 million, DHS $137 million, NASA $76 million, State $31 million, HHS $23 million. NASA at 11 percent is the distinctive entry, reflecting center-level administrative and program support that the agency buys separately from its engineering services.
What belongs here
Providing day-to-day office administrative services such as financial planning, billing and recordkeeping, personnel, and physical distribution and logistics, on a contract or fee basis. The definition carries an explicit limit that decides most classification disputes: these establishments do not provide operating staff to carry out the complete operations of a business.
- Providing the operating staff and running the site is 561210.
- Professional and technical support beyond administration is 561499.
- Bookkeeping and accounting operations specifically are 541219.
Competing in this code
The code had 148 IDVs alongside 1,665 awards in FY2025, at an average around $400,000. The $12.5 million size standard is one of the lowest in the support sector, which keeps large firms out of set-asides and makes this a genuine on-ramp for a first federal award. The recurring evaluation theme is continuity: agencies buying administrative support are protecting institutional knowledge, so incumbent capture rates are high and the winning displacement strategy is a documented transition plan with retained incumbent staff.
NAICS 561110 FAQ
What is the SBA size standard for NAICS 561110?
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 561110 solicitation, including the set-asides.
Which agencies buy office administrative services under NAICS 561110?
FY2025 obligations: DoD ($326 million), DHS ($137 million), NASA ($76 million), State ($31 million), HHS ($23 million). NASA's 11 percent share is the standout, covering center-level administrative and program support bought separately from engineering work.
What separates NAICS 561110 from 561210?
The operating staff clause. 561110 explicitly does not include providing the staff to carry out complete operations, so it covers administrative functions performed for a client. 561210 is facilities support, where the contractor runs the site with its own workforce. Solicitations wanting a site operated use 561210 regardless of how administrative the tasks sound.
Is NAICS 561110 a realistic first federal contract?
Yes. The $12.5 million size standard keeps large firms out of set-asides, and the average award is around $400,000. The main obstacle is incumbent continuity, which is best answered with a concrete transition plan that retains experienced staff.