488999 — All Other Support Activities for Transportation
Description
This U.S. industry comprises establishments primarily engaged in providing support activities to transportation (except for air transportation; rail transportation; water transportation; road transportation; freight transportation arrangement; and packing and crating).
Illustrative Examples
- Arrangement of vanpools or car pools (except ridesharing arrangement services)
- Independent pipeline terminal facilities
- Stockyards (i.e., not for fattening or selling livestock)
Exclusions & Cross-References
- Operating stockyards for fattening livestock--are classified in Subsector 112, Animal Production and
- Aquaculture;
- Providing tariff and freight rate consulting services--are classified in U.S. Industry 541614, Process,
- Physical Distribution, and Logistics Consulting Services;
- Providing packing and crating services for transportation (except warehousing)--are classified in U.S.
- Industry 488991, Packing and Crating;
- Providing warehousing services--are classified in Industry Group 4931, Warehousing and Storage;
- Operating car pools and vanpools--are classified in U.S. Industry 485999, All Other Transit and Ground
- Passenger Transportation;
- Providing pipeline transportation and storage of natural gas--are classified in Industry 486210, Pipeline
- Transportation of Natural Gas;
- Providing support activities for air transportation--are classified in Industry Group 4881, Support Activities
Overview Facts
| NAICS Code | 488999 |
|---|---|
| Industry Title | All Other Support Activities for Transportation |
| SBA Size Standard | $25,000,000 |
| IRS PBA Code | 488990 (rolled-up match) |
| Sectors Hierarchy | Sector 48-49 → 488 → 4889 |
| Source / Verified | US Census 2022 NAICS Manual / 2026-06-28 |
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 4729 - Arrangement of Passenger Transportation, NEC (via SIC1987:4729→NAICS1997:488999→2002:488999→2007:488999→2012:488999→2017:488999→2022:488999)
- SIC 4789 - Transportation Services, NEC (via SIC1987:4789→NAICS1997:488999→2002:488999→2007:488999→2012:488999→2017:488999→2022:488999)
Related Resources & Compliance Guides
Further regulatory reference links for NAICS code 488999:
- 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 4889
Frequently Asked Questions (FAQ)
Is 488999 a valid 2022 NAICS code?
NAICS 488999 is 'All Other Support Activities for Transportation', a 2022 U.S. national industry under Sector 48-49 (Transportation and Warehousing); the SBA small-business size standard is $25,000,000.
What is the SBA size standard for NAICS 488999?
The SBA small business size standard for NAICS 488999 is $25,000,000 (based on receipts).
What is the legacy SIC code mapping for 488999?
NAICS code 488999 maps to the legacy 1987 SIC codes: 4729 - Arrangement of Passenger Transportation, NEC, 4789 - Transportation Services, NEC.