SBA size standard
$19.5 million
Measured by average annual receipts over the last 5 fiscal years
SBA table effective March 2023
FY2025 federal spending
The Department of Defense bought 43% of the $12.0B obligated under 541990 in FY2025.
- Contract awards
- 11,779
- Contract vehicles (IDVs)
- 1,264
Top buying agencies
- Department of Defense$5.2B
- Department of Energy$2.2B
- Department of Health and Human Services$1.2B
- Agency for International Development$1.1B
- General Services Administration$1.0B
FY2025 federal contract obligations, USAspending.gov
All Other Professional, Scientific, and Technical Services (NAICS 541990) is a catch-all category for professional and technical services not classified elsewhere. This is typically a secondary code for companies whose primary services fall into other NAICS categories.
What Businesses Fall Under This Code
541990 includes specialized professional services, technical services, and professional consulting that don't fit other classifications. This is the "other" category—if your services don't clearly fit other codes, 541990 may apply.
SBA Size Standard and What It Means
The SBA size standard for 541990 is $19.5 million in average annual receipts. With average annual receipts of $19.5 million or less, you count as a small business on contracts filed under this code.
Federal Spending in This Category
Federal spending in miscellaneous professional services is significant, though specific amounts vary. This category captures specialized services across government.
Top Agencies Buying in This Code
All federal agencies procure specialized professional services. This spending is distributed across agencies based on mission-specific needs.
Tips for Tech Companies Using This Code
Use 541990 as a secondary code if your specialized services don't clearly fit other codes. This should rarely be your primary NAICS code—if you can classify your services more specifically (development, engineering, consulting), do so. But if you offer truly unique technical services, 541990 may be necessary.
Pro Tip: Avoid 541990 as your primary code if possible. Federal procurement officers search by specific NAICS codes. Being categorized as "other services" makes you less visible than companies in specific technical categories. Use more specific codes when available.