NAICS 541990: All Other Professional, Scientific, and Technical Services
All Other Professional, Scientific, and Technical Services is NAICS code 541990. A business is small under it with $19.5 million or less in average annual receipts. 34 federal contracts are open on SAM.gov under this code right now.
- SBA size standard
- $19.5 million or less in average annual receipts
- Open contracts now
- 34
- Federal spending, FY2026
- $11.4 billion
- Share won by small businesses
- 19%
- Small businesses registered
- 14,799
Open federal contracts for all other professional, scientific, and technical services
- Contractor Owned Contractor Operated Aviation Support Services - US ACIC ISR
Due in 3 daysOct 7, 2026
- Oak Ridge Institute for Science and Education (ORISE) (Expressions of Interest and Request for Information)
Due in 3 daysOct 7, 2026
- Romania Follow on (FY27)
Due in 4 daysOct 8, 2026
- Technical Support Services for the FHWA Office of Safety and Operations Research & Development
Due in 5 daysOct 9, 2026
- Notice of Intent to Sole Source – National Marrow Donor Program – service agreement
Due in 8 daysOct 12, 2026
- USACE Enterprise-Wide Trident Services
Due in 9 daysOct 13, 2026
What NAICS 541990 covers
The Census Bureau's NAICS index lists these kinds of work under 541990:
- Appraisal (except real estate) services
- Arbitration and conciliation services (except by attorney, paralegal)
- Business brokers (except real estate brokers)
- Commodity inspection services
- Construction estimation services
- Consumer credit counseling services
- Credit repair (i.e., counseling) services, consumer
- Electronic communication content verification services
- Estate assessment (i.e., appraisal) services
- Fire extinguisher testing and/or inspection, without sales, service, or installation
- Handwriting analysis services
- Handwriting expert services
- Marine forecasting services
- Marine surveyor (i.e., ship appraiser) services
The index lists 23 entries for this code in all.
Read the full definition, including what's excluded, on census.gov.
SBA size standard for 541990
To count as a small business for a contract assigned NAICS 541990, your business must have $19.5 million or less in average annual receipts. Receipts are averaged over your last five completed fiscal years.
From SBA's table of size standards, effective Mar 17, 2023. Confirm it with SBA's size standards tool before you certify your size.
Who buys all other professional, scientific, and technical services
Agencies that awarded the most under NAICS 541990 over the last three fiscal years, per USAspending.gov:
| Agency | Obligated |
|---|---|
| Department of Energy | $7.3 billion |
| Department of the Air Force | $6.1 billion |
| Agency for International Development | $4.4 billion |
| Federal Acquisition Service | $3 billion |
| Department of the Army | $2.2 billion |
| Washington Headquarters Services | $2.1 billion |
| Department of the Navy | $1.6 billion |
| Federal Aviation Administration | $997.7 million |
Open notices right now come from Dept of Defense (15), General Services Administration (9), Department of Energy (2), Agency for International Development (2), Department of State (1) and Department of Transportation (1).
Set-asides on open 541990 contracts
- No set-aside (full and open): 21
- Total small business set-aside: 5
- Service-disabled veteran-owned set-aside: 4
- 8(a) set-aside: 2
- Women-owned set-aside: 2
- HUBZone set-aside: 1
Not sure which set-asides you qualify for? Try the free SBA certification screener, or read set-aside contracts, explained.
Your competition
14,799 businesses with active SAM.gov registrations are rated small under NAICS 541990, most of them in Virginia (2,030), Florida (1,373), Texas (1,288), Maryland (1,233), California (1,125). Look any of them up with the free CAGE code and UEI lookup.
Federal spending under 541990 by year
| Fiscal year | Contract obligations |
|---|---|
| FY2024 | $14.2 billion |
| FY2025 | $11.9 billion |
| FY2026 | $11.4 billion |
| FY2027 (so far) | $2 million |
Source: USAspending.gov, all contract awards with this NAICS code. Fiscal years start October 1.
Related NAICS codes
- 541910 Marketing Research and Public Opinion Polling
- 541921 Photography Studios, Portrait
- 541922 Commercial Photography
- 541930 Translation and Interpretation Services
- 541940 Veterinary Services
Frequently asked questions
What is NAICS code 541990?
541990 is the 2022 NAICS code for All Other Professional, Scientific, and Technical Services. The Census Bureau's index lists work such as appraisal (except real estate) services, arbitration and conciliation services (except by attorney, paralegal), business brokers (except real estate brokers) under it. Federal contracting uses the 2022 codes.
What is the SBA size standard for NAICS 541990?
$19.5 million or less in average annual receipts. A business at or under that is small for contracts assigned this code. The current SBA table took effect Mar 17, 2023.
Are there government contracts for all other professional, scientific, and technical services?
Yes. 34 federal contract opportunities under NAICS 541990 are open on SAM.gov right now. Agencies obligated about $11.4 billion under this code in fiscal year 2026, according to USAspending.gov.
How do I add NAICS code 541990 to my SAM.gov registration?
Update your entity registration on SAM.gov and add the code on the Goods and Services page, in the Assertions section. You can list several NAICS codes and mark one as your primary. Changes are free.
Keep going
- Search other NAICS codes by keyword or company
- How to choose NAICS codes for government contracts
- NAICS codes with the most open federal contracts
FedReady is an independent company, not affiliated with SBA, SAM.gov, the Census Bureau or any government agency. Open-contract counts come from SAM.gov and update daily; spending figures come from USAspending.gov.