What Employers Are Covered by the Railroad Retirement Act?

The Railroad Retirement Act covers five categories of employers defined in 45 U.S.C. § 231: rail carriers under Surface Transportation Board jurisdiction, companies owned by or under common control with those carriers that perform rail-related services, receivers or trustees running a covered employer’s business, industry organizations controlled by two or more covered employers, and national rail labor unions organized under the Railway Labor Act. If an entity fits one of these definitions, its workers earn railroad retirement credits instead of Social Security credits, and the entity owes railroad retirement payroll taxes. Employers covered by the Railroad Retirement Act are identified by function and corporate relationship, not by size or self-designation.¹

Rail Carriers Under Surface Transportation Board Jurisdiction

The first category is any carrier by railroad subject to the Surface Transportation Board under part A of subtitle IV of title 49. That reaches freight railroads, passenger carriers, and any operation providing common carrier service for compensation.² Class I railroads, regional lines, and short-line operators all qualify. What matters is whether the STB has jurisdiction over the carrier’s rail transportation, not the size of the operation.

Companies Owned or Controlled by a Rail Carrier

The Act reaches beyond the railroads to companies a rail carrier owns or controls, directly or indirectly, and to companies under common control with a rail carrier.¹ Control can run through voting stock or through a parent holding company that sits above both the carrier and the affiliate. A logistics subsidiary owned by the same parent as a railroad is under common control and comes within scope.

Being an affiliate is not by itself enough. The company also has to perform a rail-connected function: operating equipment or facilities, or providing services connected to the transportation of passengers or property by railroad. The statute lists receiving, delivering, elevating, transferring in transit, refrigerating or icing, storing, and handling property transported by rail.¹ A railroad-owned hotel or unrelated real estate venture would not qualify. The services have to sit in the rail transportation chain.

Receivers, Trustees, and Court-Appointed Operators

When a covered railroad enters bankruptcy or reorganization, coverage does not lapse. Any receiver, trustee, or other person or body in possession of the property or operating any part of the business of a covered employer is itself a covered employer.¹ Whoever is running the operation steps into the same tax and reporting obligations the railroad had.

Railroad Industry Organizations

Railroad associations, traffic associations, tariff bureaus, demurrage bureaus, weighing and inspection bureaus, collection agencies, and similar organizations are covered when two things are true: the organization is controlled and maintained principally by two or more covered employers, and it performs services connected with or incidental to railroad transportation.¹ A bureau serving only one carrier does not qualify under this paragraph, though it may still be reachable as a controlled affiliate.

National Railway Labor Organizations

The fifth category is any national railway labor organization organized under the Railway Labor Act, together with its state and national legislative committees, general committees, insurance departments, and local lodges and divisions.¹ Staff employed by these organizations earn railroad retirement credits rather than Social Security credits.

What the Act Does Not Cover

Two exclusions and one narrow carve-out limit the categories above.

Street, interurban, and suburban electric railways are excluded unless the line operates as part of the general diesel-railroad system of transportation. The Surface Transportation Board can determine after a hearing whether a given electric line falls within the exclusion. Most urban light rail and streetcar systems sit outside the Act and are covered by Social Security instead.¹

Trucking service performed by a rail carrier or a rail-owned company is excluded from the affiliate-coverage services. A railroad’s over-the-road trucking division does not draw its employees into the railroad retirement system.³

Casual service by an affiliate does not trigger coverage. Federal regulations treat service as casual when it is so irregular or infrequent that there is no reasonable basis to expect it to recur, or when it is otherwise insubstantial.⁴ A one-off equipment loan between affiliates might fit. A subsidiary that regularly loads freight onto railcars will not.

When a Covered Employer Has Non-Covered Workers

A company being covered does not automatically pull every worker into the system. The Railroad Retirement Board applies a multi-part test to distinguish employees from independent contractors. A person is in the service of an employer if the employer has continuing authority to supervise and direct how the work is done, if the person renders professional or technical services and is integrated into the employer’s staff, or if the person performs personal services on the employer’s property that are integrated into operations.⁵

The Board is not bound by the label the parties put in a contract. A worker who offers services to the public and can send a substitute looks like a contractor. A worker who serves one railroad exclusively and must perform the job personally looks like an employee. Where the worker is employed by a company that has its own independent business, the Board generally applies the stricter direction-and-control test rather than the broader integration tests.

How the RRB Decides Coverage

The Board does not rely on companies to self-identify. A coverage review can start from information provided by an employer or employee, a referral from another federal agency, a compliance audit of an existing carrier, or a referral from the RRB’s Inspector General.⁶ Staff investigate the facts, counsel reviews the record, and the three-member Board issues a written determination by majority vote.

Covered employers also have an ongoing reporting duty. Every covered employer must promptly notify the RRB of any change in operations, ownership, or control that affects its own status, and of any acquisition of control over another company that could bring that company within the Act.⁷ Not reporting does not remove the coverage obligation; it just delays the determination.

Challenging a Coverage Determination

A company or individual that disagrees with an initial determination has two levels of review, both with hard deadlines.

Reconsideration must be requested in writing, filed with the Secretary to the Board within one year after the initial determination is issued. Missing that deadline forfeits any further administrative or judicial appeal under the Board’s regulations.⁸

Judicial review comes after reconsideration. A petition must be filed with a federal court of appeals within 90 days after the Board mails notice of its decision. The petition can go to the circuit where the party resides or has its principal office, the Seventh Circuit, or the D.C. Circuit.⁸ The one-year reconsideration window is generous. The 90-day judicial review window is not.

What Non-Compliance Costs

Railroad retirement taxes are reported and enforced through the IRS, and the penalty structure tracks the rules for other federal employment taxes. The same failure-to-file, failure-to-pay, and failure-to-deposit penalties that apply to Social Security and Medicare taxes apply here.⁹

The failure-to-deposit penalty is tiered by how late the deposit is: 2% up to 5 days late, 5% at 6 to 15 days, 10% beyond 15 days, and 15% once the IRS has sent a delinquency notice or demanded immediate payment.¹⁰ The failure-to-file penalty runs at 5% of the unpaid tax per month, capped at 25%. Interest on underpayments compounds daily at a rate the IRS resets quarterly; the rate is 7% for the first quarter of 2026 and 6% for the second.¹¹

A company that discovers it should have been filing as a covered employer faces back taxes, penalties, and interest for every missed period. That exposure grows fast, which is why coverage questions are best resolved before an audit rather than after one.

1
Office of the Law Revision Counsel. 45 USC 231 – Definitions
2
Office of the Law Revision Counsel. 49 USC Subtitle IV, Part A – Rail
3
Office of the Law Revision Counsel. 26 USC 3231 – Definitions
4
eCFR. 20 CFR 202.6 – Casual Service and the Casual Operation of Equipment or Facilities
5
GovInfo. Employer Status Determination – Precision Locomotive Services, LLC
6
Railroad Retirement Board. Part I – Coverage of Employers and Employees, Chapter 2 – Employer Status
7
eCFR. 20 CFR 209.5 – Reports by Employers
8
eCFR. 20 CFR Part 259 – Initial Determinations and Appeals from Initial Determinations with Respect to Employer Status and Employee Status
9
Internal Revenue Service. Railroad Retirement Tax Act Desk Guide
10
Office of the Law Revision Counsel. 26 USC 6656 – Failure to Make Deposit of Taxes
11
Internal Revenue Service. Quarterly Interest Rates