Transportation and Warehousing › Support Activities for Transportation › Support Activities for Water Transportation
Sector
Transportation and Warehousing
Subsector
Support Activities for Transportation
Industry Group
Support Activities for Water Transportation
National Industry (This Code)
Other Support Activities for Water Transportation
Source: U.S. Census Bureau 2022 NAICS
Based on SBA Table of Small Business Size Standards (2024)
Size Standard
$47M average annual receipts
Measurement Period
3-year average
Standard Type
Revenue-Based
Applies To
All contracts under NAICS 488390
Set-Aside Programs
8(a), WOSB, HUBZone, SDVOSB
Certification Required
No (self-certify in SAM.gov)
Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.
The following activities are classified elsewhere in the NAICS system:
NAICS code 488390 — Other Support Activities for Water Transportation — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Support Activities for Water Transportation space will be able to find your business.
If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of $47M average annual receipts, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 488390.
NAICS code 488390 is 'Other Support Activities for Water Transportation', classified under the Transportation and Warehousing sector (NAICS 48). This industry comprises establishments primarily engaged in providing services to water transportation (except port and harbor operations; marine cargo handling services; and navigational services to
The SBA defines a small business under NAICS code 488390 (Other Support Activities for Water Transportation) as one with $47M average annual receipts. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.
To register NAICS code 488390 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 488390 (Other Support Activities for Water Transportation) to your NAICS code list. You may designate one code as your Primary NAICS code.
Other codes in Support Activities for Water Transportation
PSC codes commonly used with this NAICS sector
Source: GSA PSC Manual April 2025
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