What is Errors and Omissions (E&O) Insurance?

What does E&O insurance cover?

E&O insurance covers the legal defence costs, settlements and judgments that result when a client alleges financial loss due to a professional’s negligence, mistake or failure to perform contracted services. Common triggers include missed deadlines, inaccurate advice, oversight in a deliverable or a service that did not meet the standard a client expected. Coverage responds even when a claim is proven unfounded, since defence costs accrue regardless of outcome.

E&O policies are built around the professional service itself rather than a physical product or premises, which sets them apart from other commercial lines. A financial advisor who recommends an unsuitable investment, a consultant whose report omits a material risk or a technology vendor whose software fails to perform as contracted are all scenarios an E&O policy is designed to address.

Most policies exclude intentional wrongdoing, criminal acts and claims involving bodily injury or property damage, since those fall under other coverage lines such as general liability insurance. Many policies also include a defined scope of professional services in the declarations, so the services a business performs need to match what the policy describes.

How does an E&O claim work?

An E&O claim typically begins when a client alleges financial loss and puts the professional on notice, either through a demand letter or a lawsuit. The insurer then investigates the allegation, assigns defence counsel and manages the claim through resolution, whether that means dismissal, settlement or a judgment. Most E&O policies operate on a claims-made basis, meaning coverage responds to claims reported during the policy period, not necessarily when the underlying error occurred.

The claims-made structure has a practical implication: A business needs continuous coverage to protect against errors from work performed in prior years but not yet reported as a claim. Insurers evaluate the retroactive date on a policy carefully, since it determines how far back a covered incident can reach.

Defence costs are a central part of how E&O coverage functions. Because many E&O policies give the insurer both the right and duty to defend, they cover legal fees from the outset, which helps a business avoid a difficult choice between settling a weak claim and paying to fight it out of pocket.

Who needs E&O insurance?

Any business or individual that provides professional advice, expertise or service-based deliverables benefits from E&O insurance, since even careful professionals can face a claim from a dissatisfied client. Industries that carry E&O coverage most consistently include consulting, accounting, financial and investment advisory services, insurance agencies, real estate, technology and software, marketing, advertising, architecture and engineering.

Many client contracts and vendor agreements now require proof of E&O coverage before work can begin, particularly in technology, consulting and financial services. Organizations that contract with larger enterprises, government entities or regulated industries are increasingly likely to encounter this requirement as a condition of doing business.

How does E&O insurance differ from general liability insurance?

General liability (GL) insurance covers third-party bodily injury, property damage and related claims arising from a business’ operations or premises. E&O insurance covers financial harm resulting from professional services, advice or work product. Most businesses that provide professional services carry both, since they address entirely different categories of claims. See general liability insurance for a full definition.

How is E&O insurance different from D&O insurance?

Directors and officers (D&O) insurance protects the individuals who govern an organization, its board members and executives against claims related to management decisions, breaches of fiduciary duty or regulatory action. E&O insurance protects the organization and its professionals against claims tied to the delivery of services to clients. The two policies address different relationships: D&O concerns governance and oversight, while E&O concerns service performance. See directors and officers insurance for a full definition.

How much does E&O insurance cost?

E&O insurance premiums vary based on industry, revenue, claims history, the scope of services performed and the limits and deductible selected. A solo consultant and a multi-office engineering firm will see meaningfully different premiums, since insurers underwrite based on the specific risk profile of the business and its professional exposure to claims.

Insurers generally consider a combination of factors when setting premiums: the size and complexity of client contracts, the business’ claims history, the professional licensing and experience of its staff and the limits and deductible the business selects. Businesses that document strong risk management practices, quality control processes and contract review procedures often find this reflected favourably in underwriting.

What should you look for when buying an E&O policy?

Before purchasing E&O coverage, evaluate the retroactive date, the policy limits relative to the size of client contracts, whether defence costs erode the policy limit and whether the policy’s definition of professional services matches the work the business actually performs. These details shape how well a policy performs when a claim arises, not just whether coverage technically exists.

A few areas deserve particular attention during the buying process. First, confirm the retroactive date covers all prior work that could still generate a claim. Second, review whether defence costs are paid within the policy limit or in addition to it, since this materially affects how much coverage remains for a settlement or judgment. Third, check for contractual liability language if client contracts require specific coverage provisions. Finally, ask a broker how the policy would respond to a hypothetical claim scenario relevant to the business, since this often reveals gaps that a coverage summary alone will not.