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What is professional liability or E&O insurance?

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How would your business respond—and survive—if it made such a severe mistake that it cost a customer tens of thousands of dollars? Or, even more frustrating, what if a customer blames—and sues—your professional services firm for loss when you’re not at fault?

Professional Liability insurance, also known as Errors and Omissions (E&O) coverage, is designed to protect your business against claims that professional advice or services you provided caused a customer financial harm due to actual or alleged mistakes or a failure to perform a service.

In addition to responding to your customer’s financial losses, professional liability coverage can help your business:

  • Pay legal expenses. Whether your business is at fault or not, legal costs can add up. A professional liability policy can help your firm cover defence costs for claim and legal representation expenses at investigation.
  • Meet contractual requirements. Many corporate service contracts require professional service providers to carry professional liability coverage.
  • Compete. Carrying professional liability coverage can give you a competitive advantage by giving your customers an extra level of security.


What types of businesses require professional liability insurance?

Any business that provides its clients with expert guidance, information, or knowledge-based services—such as a bookkeeper, marketing consultant, or executive recruiter—can benefit from professional liability coverage. Certain specialized or licensed businesses like law firmsarchitecture and engineering firms, and software development companies can find professional liability solutions designed specifically for their sector. Likewise, in-house attorneys or corporate counsel can seek professional liability coverage under an employed lawyers policy, while media organizations such as publishers or broadcasters can seek coverage for their intellectual property through a media liability policy.

A broader range of service providers can seek coverage under a Miscellaneous Professional Liability (MPL) policy. Even if your business works in a highly specialized niche, an insurer that provides MPL coverage may be able to write a customized policy for your specific needs, tailored to fit your services.


What types of claims are made against professional service firms?

Professional liability claims range widely—from a client suing an accounting firm for negligence as it acquired a company based on accounts approved by the accounting firm but later it transpired that the accounts do not reflect the true value of the company, to an engineer being sued as a building they designed was proved to be inadequate for its surroundings and leaking water through the basement, to a manufacturer suing a consultant for recommending costly investments in new equipment that failed to lower production costs. However, they are generally based on a customer’s perception that a professional services firm has: 

  • Failed to complete expected tasks. A customer expects a services firm to complete a greater scope of work than what was delivered, resulting in losses to the customer.
  • Provided erroneous guidance. A customer claims that it suffered financially because a professional services firm provided inaccurate, incomplete, or misleading information or guidance.


Your business can also help prevent professional liability claims from arising or limit their severity by taking key steps to limit errors and disputes in the first place. Explore Chubb’s professional liability solutions here.


© 2022 Chubb. All rights reserved.

No part of this article may be reproduced in any written, electronic, recording, or printed form without written permission of Chubb.

Disclaimer - All contents of this article are intended for general information/guidance purposes only and not intended to be an offer or solicitation of insurance products or personal advice or a recommendation to any individual or business of any product or service. This article should not be relied on for legal advice or policy coverage and cannot be viewed as a substitute to obtaining proper legal or other professional advice, or for reading the policy documents. You should read the policy documents to determine whether any of the insurance product(s) discussed are right for you or your business, noting different limits, exclusions, terms and conditions apply in each country or territory, and not all cover is available in all countries or territories.

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