15.3 Professional Liability and Errors & Omissions

Key Takeaways

  • Professional liability/E&O covers a client's economic loss from a professional's negligent act, error, or omission - filling the CGL's professional services exclusion.
  • It is written on a claims-made basis: coverage depends on the claim being first made during the policy period (or ERP) for acts on or after the retroactive date.
  • Retroactive date and extended reporting period (tail) together prevent prior-acts gaps; dropping the retro date or skipping tail at renewal/switch creates uncovered exposure.
  • Many E&O forms are defense-within-limits, so legal-defense spending erodes the indemnity available for settlement, unlike the CGL where defense is usually outside the limit.
Last updated: June 2026

Professional Liability and Errors & Omissions

Professional liability (also called errors & omissions, E&O) covers economic loss a client suffers because of a professional's negligent act, error, or omission in rendering or failing to render professional services. It fills the CGL's professional services exclusion. Crucially, it covers financial harm rather than the bodily injury/property damage that the CGL addresses. Medical malpractice is the healthcare flavor; E&O is the term for accountants, agents, architects, engineers, and consultants.

Claims-Made Trigger: The Defining Feature

Unlike the occurrence trigger common in the CGL, almost all professional liability is written claims-made, meaning coverage responds based on when the claim is FIRST made against the insured, not when the negligent act occurred - provided the act happened on or after the retroactive date and the claim is reported during the policy period (or an extended reporting period).

  • Retroactive date: the earliest date a covered wrongful act may have occurred. Acts before it are not covered. Maintaining a retro date across renewals preserves the insured's prior-acts coverage.
  • Extended reporting period (ERP / tail): allows reporting of claims after the policy ends for acts before expiration.

The Five Claims-Made Periods (and a Worked Trigger)

Manuals teach a five-zone diagram. Apply it: retro date 1/1/2020, policy 1/1/2024-1/1/2025.

Wrongful act dateClaim first madeCovered?
6/1/2019 (before retro)3/1/2024No - act precedes retro date
3/1/20216/1/2024 (during policy)Yes
3/1/20214/1/2025 (after expiry, no tail)No - reported too late
3/1/20214/1/2025 (with 1-yr ERP)Yes - tail covers late report

Both conditions must be satisfied: act after retro date AND claim reported in-period or in the tail.

Defense, Limits, and Consent-to-Settle

  • Many E&O policies are defense-within-limits (eroding / "burning" limits): defense costs reduce the available indemnity. If the limit is $1,000,000 and $300,000 is spent on defense, only $700,000 remains for settlement. Contrast the CGL, where defense is usually outside the limit.

  • A hammer (consent-to-settle) clause: if the insurer wants to settle and the insured refuses, the insured may become responsible for any judgment above the proposed settlement plus related defense.

  • Worked example: $1,000,000 limit defense-within-limits, $250,000 defense spent, then a $900,000 settlement demand. Only $750,000 remains, so the insurer pays $750,000 and the insured covers the $150,000 gap.

Common Lines and Traps

  • Insurance agent E&O, real estate E&O, lawyer/accountant malpractice, tech/cyber E&O, architects & engineers, miscellaneous professional liability.
  • Traps: intentional/dishonest acts and bodily injury/property damage are excluded (those belong to the CGL); coverage is for the economic consequences of professional error.
  • Switching carriers without buying tail or transferring the retro date creates a coverage gap for prior acts - a heavily tested scenario.

Professional Liability vs. General Liability

Professional liability (Errors & Omissions, E&O) covers liability arising from rendering or failing to render professional services - financial harm from advice, design, or service errors - which the CGL specifically excludes. It is usually written on a claims-made basis with a retroactive date.

ProfessionCommon name
Physicians, hospitalsMedical malpractice
LawyersLegal malpractice / E&O
Architects, engineersDesign E&O
Insurance agents, real-estate agentsE&O
Accountants, consultantsE&O
Directors/officersD&O (separate)

Key Features the Exam Tests

  • No "occurrence" requirement - coverage responds to economic loss from professional error, not just bodily injury or property damage.
  • Claims-made with retroactive date - prior-acts coverage hinges on maintaining the retro date; tails (ERPs) needed on cancellation/retirement.
  • Consent-to-settle ("hammer") clause - some policies require the insured's consent to settle; if the insured refuses a recommended settlement, a hammer clause can cap the insurer's exposure.
  • Defense often inside limits (eroding) - unlike CGL, defense costs frequently reduce the available limit.

Worked Example

An insurance agent fails to add UM coverage a client requested; the client later has an uninsured-motorist loss and recovers nothing under their auto policy, then sues the agent for the $60,000 they would have collected. This is a pure economic loss from a professional error - the agent's CGL would exclude it (professional-services exclusion), but the agent's E&O policy responds, defending the suit and paying the $60,000 within its claims-made limit (assuming the act is after the retro date and the claim is timely reported).

Recognizing that financial harm from professional mistakes needs E&O (claims-made), not the CGL, is the central concept.

Medical Malpractice and Settlement Control

Medical malpractice is professional liability for healthcare providers, almost always claims-made with a retroactive date and tail options. Many professional policies contain a consent-to-settle (hammer) clause: if the insurer recommends settling and the insured refuses, the insured may become responsible for amounts above the settlement the insurer could have made. Because defense costs frequently erode the limit (defense inside limits) in professional liability - unlike the CGL where defense is outside limits - choosing an adequate limit is critical.

The exam contrasts professional liability with the CGL's professional-services exclusion: any liability from rendering or failing to render professional services is removed from the CGL and must be insured by E&O. Prior-acts coverage depends on keeping the retroactive date unchanged when switching insurers; moving it forward strips coverage for earlier errors.

Test Your Knowledge

A claims-made E&O policy has a retroactive date of 1/1/2020 and a policy period of 1/1/2024 to 1/1/2025 with no extended reporting period. A wrongful act occurred 3/1/2021 but the claim is first made on 4/1/2025. Is the claim covered?

A
B
C
D
Test Your Knowledge

An E&O policy with a $1,000,000 limit is written defense-within-limits. The insurer spends $250,000 defending the claim, then settles for $900,000. How much of the settlement does the insurer pay?

A
B
C
D