488310 — Port and Harbor Operations
NAICS 488310 is 'Port and Harbor Operations', a 2022 U.S. national industry under Sector 48-49 (Transportation and Warehousing); the SBA small-business size standard is $47,000,000.
Description
This industry comprises establishments primarily engaged in operating ports, harbors (including docking and pier facilities), or canals.
Exclusions & Cross-References
- Providing stevedoring and other marine cargo handling services (except warehousing)--are classified in
- Industry 488320, Marine Cargo Handling;
- Providing navigational services to shipping--are classified in Industry 488330, Navigational Services to
- Shipping; and
- Operating docking and/or storage facilities, known as marinas--are classified in Industry 713930, Marinas.
Overview Facts
| NAICS Code | 488310 |
|---|---|
| Industry Title | Port and Harbor Operations |
| SBA Size Standard | $47,000,000 |
| IRS PBA Code | 488300 (rolled-up match) |
| Sectors Hierarchy | Sector 48-49 → 488 → 4883 |
| Source / Verified | US Census 2022 NAICS Manual / 2026-06-28 |
NAICS Structure: 488310
National Industry
Sector (2)
48-49
Transportation and Warehousing
Subsector (3)
488
Support Activities for Transportation
Industry Group (4)
4883
Support Activities for Water Transportation
Industry (5)
48831
Port and Harbor Operations
National Industry (6)
488310
Port and Harbor Operations
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 4491 - Marine Cargo Handling (via SIC1987:4491→NAICS1997:48831→2002:488310→2007:488310→2012:488310→2017:488310→2022:488310)
- SIC 4499 - Water Transportation Services, NEC (via SIC1987:4499→NAICS1997:48831→2002:488310→2007:488310→2012:488310→2017:488310→2022:488310)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 488310:
- Sector 48-49 Directory Hub — List of related industries in the Transportation and Warehousing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.
Related Industries in 4883
Frequently Asked Questions (FAQ)
Is 488310 a valid 2022 NAICS code?
NAICS 488310 is 'Port and Harbor Operations', a 2022 U.S. national industry under Sector 48-49 (Transportation and Warehousing); the SBA small-business size standard is $47,000,000.
What is the SBA size standard for NAICS 488310?
The SBA small business size standard for NAICS 488310 is $47,000,000 (based on receipts).
What is the legacy SIC code mapping for 488310?
NAICS code 488310 maps to the legacy 1987 SIC codes: 4491 - Marine Cargo Handling, 4499 - Water Transportation Services, NEC.