485112

Commuter Rail Systems

Transportation and Warehousing › Transit and Ground Passenger Transportation › Urban Transit Systems

SBA Size Standard

$47M average annual receipts

Revenue-Based Verify at SBA.gov →

NAICS Code Hierarchy

48

Sector

Transportation and Warehousing

485

Subsector

Transit and Ground Passenger Transportation

4851

Industry Group

Urban Transit Systems

485112

National Industry (This Code)

Commuter Rail Systems

Official NAICS Description

Source: U.S. Census Bureau 2022 NAICS

📘 Source: U.S. Census Bureau — 2022 NAICS Manual
This U.S. industry comprises establishments primarily engaged in operating local and suburban commuter rail systems over regular routes and on a regular schedule within a metropolitan area and its adjacent nonurban areas. Commuter rail is usually characterized by reduced fares, multiple ride and commutation tickets, and mostly used by passengers during the morning and evening peak periods.

✓ Small Business Eligibility at a Glance

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 485112

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.

Cross-References

The following activities are classified elsewhere in the NAICS system:

Operating local and suburban mass passenger transit systems using both commuter rail and another mode of transport--are classified in U.S. Industry 485111, Mixed Mode Transit Systems;
Operating stand-alone subway or light rail systems--are classified in U.S. Industry 485119, Other Urban Transit Systems; and
Providing scenic and sightseeing transportation on land--are classified in Industry 487110, Scenic and Sightseeing Transportation, Land.

How to Use NAICS 485112 in SAM.gov

NAICS code 485112Commuter Rail Systems — 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 Urban Transit Systems 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 485112.

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Frequently Asked Questions

What is NAICS code 485112?

NAICS code 485112 is 'Commuter Rail Systems', classified under the Transportation and Warehousing sector (NAICS 48). This U.S. industry comprises establishments primarily engaged in operating local and suburban commuter rail systems over regular routes and on a regular schedule within a metropolitan area and its adj

What is the SBA small business size standard for NAICS code 485112?

The SBA defines a small business under NAICS code 485112 (Commuter Rail Systems) 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.

How do I register NAICS code 485112 in SAM.gov?

To register NAICS code 485112 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 485112 (Commuter Rail Systems) to your NAICS code list. You may designate one code as your Primary NAICS code.

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Related NAICS Codes

Other codes in Urban Transit Systems

Related PSC Codes

PSC codes commonly used with this NAICS sector

Source: GSA PSC Manual April 2025

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