What is the SBA size standard for NAICS 561110?

The SBA size standard for NAICS 561110 (Office Administrative Services) is $12.5 million in average annual receipts, per 13 C.F.R. § 121.201.

Which federal agencies buy under NAICS 561110?

For FY2024 reporting, the leading federal customers under NAICS 561110 were Department of Defense, Department of Veterans Affairs, Department of Health and Human Services, General Services Administration, Department of Homeland Security. Live obligation data is available on USAspending.gov.

What FAR or DFARS clauses commonly apply to NAICS 561110 contracts?

Frequent clause flowdowns include FAR 52.222-41 (Service Contract Labor Standards); FAR 52.222-49 (Service Contract Labor Standards — Place of Performance Unknown); FAR 52.219-14 (Limitations on Subcontracting); FAR 52.222-50 (Combating Trafficking in Persons). Each contract instrument will incorporate clauses by reference under FAR 52.252-2; this list reflects the high-frequency set for this NAICS, not an exhaustive flowdown.

Administrative & Support Services

NAICS 561110 — Office Administrative Services

Administrative services performed for client organizations: office management, financial administration, and back-office support. Federal use includes administrative support contracts at most civilian agencies.

Quick facts

SBA size standard: $12.5 million; Average annual receipts · 13 C.F.R. § 121.201
FY2024 federal obligations: $500M–$1B; See live USAspending.gov data →

Top federal customers

Federal agencies that obligate the most spending under NAICS 561110 (FY2024 reporting period). Order tracks federal-obligation volume on USAspending.gov.

1.Department of Defense
2.Department of Veterans Affairs
3.Department of Health and Human Services
4.General Services Administration
5.Department of Homeland Security

Set-aside fit

Whether NAICS 561110 commonly carries set-aside designations on federal awards. Eligibility for any specific solicitation is set by the contracting officer; this table reflects the FY2024 award pattern, not a guarantee of set-aside status.

SDVOSB (Service-Disabled Veteran-Owned Small Business)
8(a) Business Development Program
HUBZone Small Business
WOSB / EDWOSB
VOSB (Veteran-Owned Small Business)

Active 8(a) and SDVOSB surface for administrative support. Frequent NAICS protests when COs use 561110 instead of a tighter code.

Frequent prime contractors

Companies that most frequently appear as prime awardees under NAICS 561110 for FY2024. Drawn from USAspending.gov public award records — verify currency at the live link below.

MAXIMUS
Serco Inc.
CGI Federal
Vinnell Arabia
Acuity International
Deloitte
ICF International
CACI International
GovCIO
Calibre Systems

See live award data on USAspending.gov →

Common FAR / DFARS clauses

Frequently flowed-down clauses on contracts in this NAICS. The clause text on acquisition.gov is authoritative; this list captures the practical pattern, not an exhaustive flowdown.

FAR 52.222-41Service Contract Labor Standards
SCA applies to administrative support workers performing on federal sites.
FAR 52.222-49Service Contract Labor Standards — Place of Performance Unknown
Companion to SCA when work locations vary.
FAR 52.219-14Limitations on Subcontracting
Services-based 50% personnel cost limitation on set-aside awards.
FAR 52.222-50Combating Trafficking in Persons
Standard services flowdown.

Indirect rate considerations

Pure-services structure. Standard fringe / overhead / G&A. SCA fringe documentation must align to the wage determination for each work location. Provisional billing rate true-up at year end.

See FieldLedger's Indirect Rate Engine for pool definition and rate tracking, or read the FieldLedger methodology for the underlying FAR Part 31 framework.

How FieldLedger fits NAICS 561110

Signed timekeeping with SCA classification tracking. Indirect Rate Engine for the FAR Part 31 audit. Multi-CLIN invoicing for staff augmentation tasks.

DCAA compliance →Indirect Rate Engine →DCAA readiness check →

Frequently asked

What is the SBA size standard for NAICS 561110?: The SBA size standard for NAICS 561110 (Office Administrative Services) is $12.5 million in average annual receipts, per 13 C.F.R. § 121.201.
Is NAICS 561110 eligible for SDVOSB, 8(a), HUBZone, or WOSB set-asides?: Set-aside programs that commonly apply: SDVOSB, 8(a), HUBZone, WOSB, VOSB. Active 8(a) and SDVOSB surface for administrative support. Frequent NAICS protests when COs use 561110 instead of a tighter code.
Which federal agencies buy under NAICS 561110?: For FY2024 reporting, the leading federal customers under NAICS 561110 were Department of Defense, Department of Veterans Affairs, Department of Health and Human Services, General Services Administration, Department of Homeland Security. Live obligation data is available on USAspending.gov.
What FAR or DFARS clauses commonly apply to NAICS 561110 contracts?: Frequent clause flowdowns include FAR 52.222-41 (Service Contract Labor Standards); FAR 52.222-49 (Service Contract Labor Standards — Place of Performance Unknown); FAR 52.219-14 (Limitations on Subcontracting); FAR 52.222-50 (Combating Trafficking in Persons). Each contract instrument will incorporate clauses by reference under FAR 52.252-2; this list reflects the high-frequency set for this NAICS, not an exhaustive flowdown.
What indirect-rate structure works for a federal contractor in NAICS 561110?: Pure-services structure. Standard fringe / overhead / G&A. SCA fringe documentation must align to the wage determination for each work location. Provisional billing rate true-up at year end.
How does FieldLedger help small federal contractors in NAICS 561110?: Signed timekeeping with SCA classification tracking. Indirect Rate Engine for the FAR Part 31 audit. Multi-CLIN invoicing for staff augmentation tasks.

Sources

U.S. Census NAICS manual — census.gov/naics
SBA size-standards table — 13 C.F.R. § 121.201 (eCFR)
Federal obligations + prime awardees — USAspending.gov NAICS 561110
FAR / DFARS clause text — acquisition.gov

Snapshot date: 2026-05-08 (FY2024 reporting period). Federal-obligation bands and prime-contractor lists reflect the data as of the snapshot — refresh against USAspending.gov for current figures.