What is the SBA size standard for NAICS 541618?

The SBA size standard for NAICS 541618 (Other Management Consulting Services) is $19.5 million in average annual receipts, per 13 C.F.R. § 121.201.

Which federal agencies buy under NAICS 541618?

For FY2024 reporting, the leading federal customers under NAICS 541618 were Department of Defense, Department of Veterans Affairs, Department of Homeland Security, Department of Health and Human Services, General Services Administration. Live obligation data is available on USAspending.gov.

What FAR or DFARS clauses commonly apply to NAICS 541618 contracts?

Frequent clause flowdowns include FAR 52.219-14 (Limitations on Subcontracting); FAR 52.227-14 (Rights in Data — General); FAR 31.205-33 (Professional and Consultant Service Costs); 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.

Professional, Scientific, Technical Services

NAICS 541618 — Other Management Consulting Services

Specialized management consulting that does not fit administrative, HR, marketing, or process consulting buckets. Federal use concentrates in logistics consulting, telecommunications management, and program management offices for DoD and civilian agencies.

Quick facts

SBA size standard: $19.5 million; Average annual receipts · 13 C.F.R. § 121.201
FY2024 federal obligations: $1B–$2B; See live USAspending.gov data →

Top federal customers

Federal agencies that obligate the most spending under NAICS 541618 (FY2024 reporting period). Order tracks federal-obligation volume on USAspending.gov.

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

Set-aside fit

Whether NAICS 541618 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 set-aside surface for niche consulting practices. Smaller size standard than 541611 means small-business eligibility is easier to retain.

Frequent prime contractors

Companies that most frequently appear as prime awardees under NAICS 541618 for FY2024. Drawn from USAspending.gov public award records — verify currency at the live link below.

Booz Allen Hamilton
Guidehouse
LMI
CACI International
Deloitte Consulting
ICF International
Accenture Federal
Tetra Tech
CGI Federal
AECOM

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 52.219-14Limitations on Subcontracting
Services-based 50% personnel cost self-performance applies on every set-aside award.
FAR 52.227-14Rights in Data — General
Default treatment for consulting reports and analyses.
FAR 31.205-33Professional and Consultant Service Costs
Documentation requirements when subcontracting to other consultants.
FAR 52.222-50Combating Trafficking in Persons
Standard services flowdown.

Indirect rate considerations

Pure-services structure. Standard fringe / overhead / G&A. Travel under FAR 31.205-46 is the most common cost-allowability question. Provisional billing rates require year-end true-up against actuals.

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 541618

Signed timekeeping and Indirect Rate Engine. Project P&L tracks engagement margin. QuickBooks sync keeps the GL aligned with provisional billing.

DCAA compliance →Indirect Rate Engine →DCAA readiness check →

Frequently asked

What is the SBA size standard for NAICS 541618?: The SBA size standard for NAICS 541618 (Other Management Consulting Services) is $19.5 million in average annual receipts, per 13 C.F.R. § 121.201.
Is NAICS 541618 eligible for SDVOSB, 8(a), HUBZone, or WOSB set-asides?: Set-aside programs that commonly apply: SDVOSB, 8(a), HUBZone, WOSB, VOSB. Active set-aside surface for niche consulting practices. Smaller size standard than 541611 means small-business eligibility is easier to retain.
Which federal agencies buy under NAICS 541618?: For FY2024 reporting, the leading federal customers under NAICS 541618 were Department of Defense, Department of Veterans Affairs, Department of Homeland Security, Department of Health and Human Services, General Services Administration. Live obligation data is available on USAspending.gov.
What FAR or DFARS clauses commonly apply to NAICS 541618 contracts?: Frequent clause flowdowns include FAR 52.219-14 (Limitations on Subcontracting); FAR 52.227-14 (Rights in Data — General); FAR 31.205-33 (Professional and Consultant Service Costs); 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 541618?: Pure-services structure. Standard fringe / overhead / G&A. Travel under FAR 31.205-46 is the most common cost-allowability question. Provisional billing rates require year-end true-up against actuals.
How does FieldLedger help small federal contractors in NAICS 541618?: Signed timekeeping and Indirect Rate Engine. Project P&L tracks engagement margin. QuickBooks sync keeps the GL aligned with provisional billing.

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 541618
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.