NAICS Code 561110: Office Administrative Services
National industry
SBA small business size standard: $12.5 million in average annual receipts
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.
Government contracts for this service: PSC R699 Other Administrative Support Services
Code facts
- Part of
-
-
56
-
561
-
5611
- 56111
-
5611
-
561
-
56
- Contract awards
- 292 In the last 12 months
- Contract obligations
- $655,300,333 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 561110
- Administrative management services
- Business management services
- Executive management services
- Hotel management services (except complete operation of client's business)
- Management services (except complete operation of client's business)
- Managing offices of dentists
- Managing offices of physicians and surgeons
- Managing offices of professionals (e.g., dentists, physicians, surgeons)
- Medical office management services
- Motel management services (except complete operation of client's business)
- Office administration services
- Office management services
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | $13,908,694 |
| FY2026 | $437,933,293 |
| FY2025 | $655,300,333 |
| FY2024 | $788,605,366 |
| FY2023 | $853,403,419 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Koniag Brillient, LLC | $34,201,774 | |
| 2 | Kent Campa & Kate Inc. | $24,172,181 | |
| 3 | Agile Decision Sciences, LLC | $22,879,494 | |
| 4 | Bowhead Marine Support Services, LLC | $22,625,915 | |
| 5 | 1 - 8A Iso9001 Fedsync-Bfs, LLC | $22,374,354 | |
| 6 | Sciolex Corporation | $17,820,066 | |
| 7 | Katmai North America, LLC | $16,008,741 | |
| 8 | LMI Consulting, LLC | $14,951,954 | |
| 9 | Federal Staffing Resources, LLC | $13,775,044 | |
| 10 | Bowhead Marine Support Services LLC | $13,314,703 |
See the full FY2025 ranking of NAICS 561110 contractors, by parent company.
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Homeland Security | $65,607,125 | |
| 2 | Defense Health Agency | $62,334,061 | |
| 3 | Department of the Army | $51,755,843 | |
| 4 | National Aeronautics and Space Administration | $48,992,418 | |
| 5 | Air Force | $48,261,661 | |
| 6 | Department of Health and Human Services | $30,089,696 | |
| 7 | Department of the Navy | $29,198,761 | |
| 8 | Department of State | $26,282,918 | |
| 9 | Department of Transportation | $14,627,890 | |
| 10 | Department of Energy | $14,303,616 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | R699 Other Administrative Support Services | $254,090,141 | |
| 2 | R499 Other Professional Services | $53,974,001 | |
| 3 |
R408 Program Management/ |
$31,020,922 | |
| 4 | Q801 Medical Appointing Services | $16,536,459 | |
| 5 | U009 Education Services | $15,119,377 | |
| 6 | AC32 National Defense R&D Services; Defense-Related Activities; Applied Research | $14,951,954 | |
| 7 | R616 Administrative Support Services | $9,508,401 | |
| 8 | R707 Contract, Procurement, and Acquisition Support Services | $9,031,488 | |
| 9 | R799 Other Management Support Services | $7,611,933 | |
| 10 |
U008 Training/ |
$7,304,192 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Virginia | $90,980,762 | |
| 2 | Maryland | $64,437,028 | |
| 3 | Texas | $61,184,123 | |
| 4 | District of Columbia | $35,768,438 | |
| 5 | Colorado | $24,848,689 | |
| 6 | Washington | $17,307,127 | |
| 7 | Missouri | $14,506,243 | |
| 8 | New Mexico | $11,125,801 | |
| 9 | North Carolina | $10,078,003 | |
| 10 | California | $9,439,332 | |
| 11 | Alabama | $6,730,937 | |
| 12 | Tennessee | $6,640,270 | |
| 13 | Kentucky | $5,619,067 | |
| 14 | Georgia | $5,403,004 | |
| 15 | Mississippi | $5,280,263 | |
| 16 | Hawaii | $4,582,597 | |
| 17 | Oklahoma | $4,017,492 | |
| 18 | Pennsylvania | $3,901,406 | |
| 19 | Florida | $3,064,674 | |
| 20 | Arizona | $2,916,816 | |
| 21 | Ohio | $2,547,944 | |
| 22 | South Carolina | $2,317,279 | |
| 23 | South Dakota | $2,257,660 | |
| 24 | Illinois | $1,538,233 | |
| 25 | Alaska | $1,323,698 | |
| 26 | Kansas | $1,276,930 | |
| 27 | Arkansas | $1,263,056 | |
| 28 | Massachusetts | $1,163,507 | |
| 29 | New Jersey | $1,084,212 | |
| 30 | Minnesota | $940,325 | |
| 31 | New York | $806,477 | |
| 32 | Puerto Rico | $704,897 | |
| 33 | Rhode Island | $561,324 | |
| 34 | Nevada | $319,899 | |
| 35 | Indiana | $315,001 | |
| 36 | Montana | $275,468 | |
| 37 | Wyoming | $269,063 | |
| 38 | Michigan | $259,442 | |
| 39 | North Dakota | $196,226 | |
| 40 | Louisiana | $156,735 | |
| 41 | Idaho | $154,697 | |
| 42 | Nebraska | $72,446 | |
| 43 | Oregon | $44,137 | |
| 44 | Utah | $41,434 | |
| 45 | Connecticut | $29,114 |
Show all 45
Shares are of everything obligated under NAICS 561110 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 3,695 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
Proposed size standard changes
| Proposed rule | Published | Comments |
|---|---|---|
| Small Business Size Standards: Monetary-Based Industry Size Standards | Closed Oct 21, 2025No final rule found |
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 561110?
NAICS 561110 is Office Administrative Services, a national industry in NAICS 56, Administrative and Support and Waste Management and Remediation Services.
What is the NAICS code for office management services?
The NAICS code for office management services is 561110, Office Administrative Services.
What is the NAICS code for business management services?
The NAICS code for business management services is 561110, Office Administrative Services.
What is the NAICS code for managing offices of dentists?
The NAICS code for managing offices of dentists is 561110, Office Administrative Services.
When did the size standard for NAICS 561110 last change?
The most recent Federal Register rule on record that names NAICS 561110 in the SBA's size standards is "Small Business Size Standards: Adjustment of Monetary-Based Size Standards, Disadvantage Thresholds, and 8(a) Eligibility Thresholds for Inflation" (87 FR 69118), published Nov 17, 2022 and effective Dec 19, 2022.
How much do federal agencies spend under NAICS 561110?
Federal contracts under NAICS 561110 obligated $655,300,333 in fiscal year 2025 and $2,749,151,104 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 561110?
The contractors with the most obligated under NAICS 561110 in fiscal years 2026 and 2027 are Koniag Brillient, LLC ($34,201,774); Kent Campa & Kate Inc. ($24,172,181); and Agile Decision Sciences, LLC ($22,879,494).
Which agencies buy the most under NAICS 561110?
The agencies that obligated the most under NAICS 561110 in fiscal years 2026 and 2027 are Department of Homeland Security ($65,607,125), Defense Health Agency ($62,334,061) and Department of the Army ($51,755,843).
Which PSC codes are used with NAICS 561110?
The PSC codes with the most obligated under NAICS 561110 in fiscal years 2026 and 2027 are R699 Other Administrative Support Services, R499 Other Professional Services and R408 Program Management/
Where is the work under NAICS 561110 performed?
By place of performance, the states with the most contract obligations under NAICS 561110 over the last 12 months are Virginia ($90,980,762), Maryland ($64,437,028) and Texas ($61,184,123).
What is the latest contract opportunity under NAICS 561110?
The latest contract opportunity under NAICS 561110 is DHA Enterprise Referral Care Coordination Center Contract (RC3), special notice from Defense Health Agency, posted October 30, 2026.
On GovTribe
See everything under NAICS 561110
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