Commuter Rail Liability Cap Increase: How Rail Agencies Should Respond

Commuter Rail Liability Cap Increase: How Rail Agencies Should Respond
August 26, 2026 7 mins

Commuter Rail Liability Cap Increase: How Rail Agencies Should Respond

Commuter Rail Liability Cap Increase: How Rail Agencies Should Respond

The U.S. passenger rail liability cap recently rose to $401.9 million, adjusted for inflation after five years. While the increase was expected, it brings immediate challenges for commuter railroads facing tight budgets and a hardened excess liability market.

Key Takeaways
  1. The new U.S. commuter rail liability cap of $401.9 million represents a $79 million increase from the previous limit, intensifying immediate financial pressure on publicly funded and cash-strapped agencies.
  2. Despite the FAST Act not requiring insurance, track owners and PTC system providers contractually mandate coverage at the full cap, making compliance unavoidable.
  3. Long-term sustainability will require alternative strategies — such as captives, group purchasing and other risk financing models — as commercial rail liability capacity continues to contract.

A recent inflation adjustment under the FAST Act of 2015 has raised the liability cap for all 32 U.S. commuter rail agencies — adding pressure to long-term risk sustainability in a tight excess liability market. 

If agencies are unable to secure coverage at the updated limit, major U.S. cities could face serious economic disruptions. Solving this challenge demands coordinated effort among agencies, Congress, states and insurers. With unified action, the industry can stabilize risk and maintain essential service continuity.

Market Dynamics Impacting Commuter Rail Agencies

Excess liability capacity remains tight, increasing the urgency for agencies to secure coverage at the newly elevated cap. Overseas markets — primarily in London, Bermuda and Europe — continue to write excess rail liability, and many underwriters remain cautious in the face of recent nuclear verdicts.

This pressure persists even as commuter rail safety continues to improve. Investments in systems like Positive Train Control (PTC) have materially strengthened operational risk profiles. The 2025 Aon Public Transit Liability Benchmark Report indicates that in 2024, roughly two-thirds of combined rail and bus claims were under $5,000, and fewer than 1% exceeded $1 million — though those rare high-severity claims accounted for 38% of total incurred costs.

Quote icon

Extreme losses in the passenger rail sector are rare; however, underwriters have seen losses like the 2023 East Palestine, Ohio freight settlement and rising litigation issues in the U.S., and they are concerned. The freight underwriters also underwrite commuter rail and short lines.

Otis Tolbert
Global Industry Specialty Leader, Rail

What’s Changed and Why

Under the FAST Act of 2015, the liability insurance cap ($323 million through 2026) is adjusted by Congress for inflation every five years. The cap was adjusted to $401.9 million in August 2026.

  • No federal mandate exists that requires the rail agencies to purchase liability cover to that limit. However, they must do so to comply with third-party vendor requirements — freight railroads that own the tracks they use and PTC vendors. Agencies have no leverage. They must comply to avoid a breach of contract and a potential suspension of operations.
  • Agencies effectively have 30 days to obtain new coverage once the cap amount has been announced. In 2025, they asked Congress to increase that window to 90 days. The bipartisan bill HR 5697 was introduced to ease that pressure but has yet to move further. It would be a stop-gap measure at best.
  • The cap increase has once again led the 32 commuter rail agencies to approach the global excess marketplace at the same time to seek cover within the required 30 days.

Half of U.S. commuter rail systems operate in part on infrastructure owned by Class I freight operators, which control about 25% of the track commuter agencies depend on.1

With capacity in the global excess liability market constrained, passenger rail agencies unable to secure cover to the new liability limit would face short-term issues including a potential shutdown of services.2

If an agency cannot obtain the required coverage, it risks losing access to Class I infrastructure or PTC systems.3

“Worst case scenario should the agencies be unable to comply, is that the track owners and other vendors tell them they cannot run on their tracks,” adds Tolbert. “That has huge implications. The Commuter Rail Coalition is already working to understand the economic impact of the commuter rails not running.”

Potential Economic Impacts of Commuter Rail Disruption

  • 01
    City Rail Dependency

    Major U.S. cities, including Chicago, New York, Washington D.C., San Francisco, Boston and Philadelphia, depend heavily on commuter rail as a primary workforce conveyor.

  • 03
    Economic Implications

    Commuter rail contributes billions of dollars to the U.S. economy and two-thirds of commuter rail spending flows to the private sector.

  • 04
    Employment Disruption

    The 32 agencies employ 32,000 workers directly and support upwards of 190,000 public and private-sector jobs.4

Long-Term Solutions for Rail Agencies

Alternative Risk Capital: Forward-thinking buyers and agencies must consider capital market participation and alternative risk transfer solutions, which may become relevant in future years. Captive structures allow agencies to take control of their risk profiles and potentially, over time, realize fixed-cost savings. They can also serve as portals for accessing other alternative risk transfer products to optimize risk management strategies. 

“Captives allow agencies to bank premiums over time and build their own insurance company,” adds Tolbert. “We see this in the oil and utilities industries, and this industry could do the same over time. However, captives must be used properly.”

Group Purchasing and Cooperative Structures: Agencies pooling risk demand could stabilize pricing and broaden negotiating leverage. Several commuter rail associations, including the Commuter Rail Coalition, have begun to explore coordinated solutions among commuter rail agencies.

Advocacy and Policy Options: Coordinated advocacy and lobbying at the state and federal levels remain essential. At the state level, agencies could lobby for transitional funding, credit mechanisms to support reserve building and statutory reform to align funding cycles with liability adjustments. At the federal level, work is already underway. HR 5697 was introduced to provide additional time for agencies to purchase higher liability limits, however, it has yet to be enacted.

17%

Aon’s 2025 Public Transit Liability Benchmark Report reveals limited captive use among rail and bus agencies.

Learn More

How Aon Can Support Clients

  1. Aon Client Treaty: The Aon Client Treaty enables clients to access pre-secured Lloyd’s co-insurance capacity on core business lines and has already helped provide relief for some Aon commuter rail clients.
  2. Advisory and Execution Support: Aon partners with its commuter rail clients in a variety of areas including: 
  • Updated modeling to quantify the exposure gap between the old and new caps
  • Working with carriers on rapid placement of new excess layers following announcement
  • Feasibility studies for captives, group purchase structures or hybrid programs
  • Multiyear alternative risk strategies to reduce reliance on shrinking commercial markets
  • Stakeholder communication support (boards, appropriators, government partners)
Aon’s Thought Leader
  • Otis Tolbert
    Global Industry Specialty Leader, Rail

1 Freight Railroads & Amtrak: A Comprehensive Guide, Association of American Railroads
2 Steep insurance cost increases loom for commuter rail, Smart Cities Dive
3 Liability Insurance Could Stop Our Trains. Here’s How We Fix It. Rail Passengers Association
4 American Public Transportation Association Fact Sheet

General Disclaimer

This document is not intended to address any specific situation or to provide legal, regulatory, financial, or other advice. While care has been taken in the production of this document, Aon does not warrant, represent or guarantee the accuracy, adequacy, completeness or fitness for any purpose of the document or any part of it and can accept no liability for any loss incurred in any way by any person who may rely on it. Any recipient shall be responsible for the use to which it puts this document. This document has been compiled using information available to us up to its date of publication and is subject to any qualifications made in the document.

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The contents herein may not be reproduced, reused, reprinted or redistributed without the expressed written consent of Aon, unless otherwise authorized by Aon. To use information contained herein, please write to our team.

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