Business Insurance

Professional Liability Insurance

Professional liability insurance, sometimes called E&O, protects consultants, attorneys, accountants, and other professionals from negligence claims tied to the services they provide.

Last reviewed: May 2026 · Editorial methodology

Definition

Professional liability insurance covers legal defense and damages when a client alleges your professional advice, service, or failure to perform caused them financial loss. It is distinct from general liability, which covers physical injury or property damage rather than economic harm from faulty professional work. Solo consultants and freelancers might pay $500–$2,000/year, while architects or engineers can pay $5,000–$20,000/year depending on project size and claims history. The policy is nearly always written on a claims-made basis, meaning coverage applies only if both the act and the claim occur while the policy is active — creating a critical need for tail coverage when switching insurers or retiring. Many states require certain professions, such as attorneys, CPAs, and real estate agents, to carry minimum professional liability limits as a condition of licensure. Failing to disclose known disputes or prior claims at policy inception can void coverage under the misrepresentation provisions.

Where this term matters

Business Insurance →/business/professional-liability →/business/bop →

Tip

Glossary definitions are educational. Always check your own policy language — insurers can define common terms differently from one another. When in doubt, request a written explanation from your agent.

Related terms

Errors and Omissions Insurance (E&O)E&O insurance protects businesses and professionals from claims arising from mistakes, oversights, or failure to deliver promised services.Claims-Made PolicyClaims-made policies tie coverage to when a claim is reported rather than when the incident happened, making continuous coverage and retroactive dates critically important.Tail Coverage (Extended Reporting Period)Tail coverage — formally called an Extended Reporting Period (ERP) — is essential when a claims-made policy is canceled or not renewed, protecting against late-emerging claims.Retroactive DateThe retroactive date on a claims-made policy defines how far back in time covered incidents can originate — incidents before this date are excluded.Prior Acts CoveragePrior acts (nose) coverage sets the retroactive date on a new claims-made policy to match the old insurer's retroactive date, covering incidents from before the new policy started.
Source: Cover Forge USA editorial team|Last verified: May 2026|Methodology
Definitions are educational and may be simplified. Always refer to your policy contract and consult a licensed agent for terms that affect coverage decisions.
CF

Cover Forge USA Editorial Team

Editorial Lead

This article was researched and written by the Cover Forge USA editorial team against federal sources (NAIC, CMS, FEMA, DOL, SSA, state DOIs) and standard policy forms. Bylines organize content by topic — they do not assert individual licensure. See our editorial-policy for details.

Reviewed June 2026

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