15.3 Professional Liability and Errors & Omissions

Key Takeaways

  • Professional liability (Errors & Omissions) covers economic harm caused by negligent performance of professional services - bad advice, mistakes, omissions - which the CGL specifically excludes via the professional-services exclusion.
  • Most E&O and malpractice forms are written on a CLAIMS-MADE basis: coverage triggers when the claim is first made during the policy period, not when the act occurred.
  • A retroactive date bars claims arising from acts before that date; an Extended Reporting Period (tail) lets claims be reported after the policy ends for prior covered acts.
  • Medical malpractice and legal malpractice are professional liability; the term E&O is common for non-medical professions such as insurance agents, accountants, and architects.
  • Punitive damages and intentional/fraudulent acts are typically excluded; the policy responds to negligent errors, not deliberate wrongdoing.
Last updated: June 2026

What Professional Liability Covers

Professional liability, widely called Errors & Omissions (E&O), covers a professional's legal liability for economic injury caused by a negligent act, error, or omission in rendering professional services. The harm is usually financial loss rather than bodily injury or property damage.

The Commercial General Liability (CGL) form contains a professional-services exclusion, so this exposure must be insured separately.

ProfessionTypical Policy Name
Physician, surgeonMedical malpractice
AttorneyLegal malpractice / Lawyers E&O
Insurance agent, accountantE&O
Architect, engineerDesign professional E&O

Quick Answer: E&O insures the consequences of professional mistakes and bad advice - the financial harm to clients - whereas the CGL handles ordinary bodily injury and property damage from premises and operations.

Occurrence vs. Claims-Made

Most professional liability is claims-made, a key contrast with the occurrence trigger used by the CGL.

TriggerCoverage Applies When
OccurrenceThe injury-causing event happens during the policy period
Claims-madeThe claim is first MADE against the insured during the policy period

Claims-made forms let insurers price long-tail professional risks more accurately, because a claim for a 2020 error may not surface until years later.

Retroactive Date and the Tail

Two features control a claims-made policy:

  • Retroactive date - the policy will not cover claims arising from acts that occurred before this date. A claim for an error predating the retro date is barred even if reported during the policy period.
  • Extended Reporting Period (ERP), or tail - lets the insured report claims after the policy ends, as long as the act occurred after the retro date and during the original coverage. It protects retiring professionals and anyone switching carriers.

Worked Scenario

An accountant's policy has a retroactive date of 1/1/2024 and runs 1/1/2026-1/1/2027.

Act DateClaim First MadeCovered?
6/1/20269/1/2026Yes - act and claim within period
3/1/20239/1/2026No - act precedes retro date
6/1/20264/1/2027Only if a tail/ERP is purchased

Common Exclusions and Limits

  • Intentional, dishonest, or fraudulent acts are excluded - E&O responds to negligence, not deliberate wrongdoing.
  • Punitive damages are usually excluded or restricted by state law.
  • Bodily injury / property damage belong on the CGL, not the E&O.

Exam Trap: A claims-made policy with no retroactive date (or a date matching policy inception) gives no coverage for prior acts. Watch for questions where the loss-causing error predates the retro date - the claim is denied.

Defense Costs and Consent to Settle

Many professional liability forms pay defense costs within the limit (defense-within-limits), so litigation expense erodes the dollars available for a settlement. A $1,000,000 limit reduced by $250,000 of defense costs leaves only $750,000 for any judgment. Other forms pay defense outside the limit; recognizing which applies changes how much real protection a stated limit provides.

A distinctive feature of professional liability is the consent-to-settle (hammer) clause. Because a settlement can imply the professional was negligent and harm their reputation, the policy often requires the insured's consent to settle. If the insured refuses a settlement the insurer recommends, the hammer clause can cap the insurer's payment at the rejected settlement amount plus defense to that date, leaving the insured responsible for the excess.

Prior Acts and Switching Carriers

When a professional moves from one claims-made insurer to another, the new policy can grant prior-acts (nose) coverage by setting a retroactive date back to the original coverage date, avoiding a gap. Alternatively the expiring insurer sells a tail (ERP). Buying both is wasteful; the exam tests whether you can pick one appropriate solution. A retiring professional with no successor policy needs the tail, since there is no new policy to carry prior acts.

Per-Claim vs. Aggregate Limits

Professional liability commonly states two numbers, such as $1,000,000 per claim / $3,000,000 aggregate. The per-claim limit caps any single matter; the aggregate caps the policy year. A busy practice hit by three covered claims of $1,000,000 each would exhaust the $3,000,000 aggregate and have nothing left for a fourth claim until renewal. Candidates should be ready to read both figures and identify when the aggregate, not the per-claim limit, controls the recovery.

Vicarious and Entity Coverage

Firms purchase E&O so the entity and its professionals are both insured; a malpractice suit usually names the individual practitioner and the firm vicariously. The form's definition of professional services controls scope - an insurance agency's E&O covers errors in placing coverage but not, for example, financial-planning advice unless that service is added. Reading the professional-services definition is essential, because a service outside the definition is simply uninsured even when performed negligently.

Professional Liability / E&O: Triggers, Forms, and Worked Traps

Professional liability (Errors & Omissions, E&O, and malpractice for medical professionals) covers liability arising from rendering or failing to render professional services — a financial-injury exposure the CGL's bodily-injury/property-damage trigger does not reach. Because the harm is economic and often delayed, E&O is almost always written claims-made with a retroactive date.

FeatureE&O / Professional Liability
InsuresNegligent acts, errors, omissions in professional services
TriggerClaims-made; retro date controls
StandardThe professional's duty of care (not a no-fault standard)
CGL gap filledEconomic loss without BI/PD

E&O does not require bodily injury — a client's purely financial loss from bad advice is the core exposure. Unlike general liability, many E&O forms cover only negligence, not intentional or dishonest acts, and the insured's consent is sometimes required to settle ("hammer clause").

Worked scenario (insurance agent E&O): A client asks an agent to add flood coverage; the agent forgets. A flood then causes $90,000 of damage the homeowners policy excludes. The client sues the agent for the uninsured loss. The agent's E&O policy responds (subject to retro date and limits) because the loss flows from the agent's professional error, not from any covered property peril.

Claims-made trap: If the agent's error occurred in 2024 but the suit arrives in 2026 after switching E&O carriers without preserving the 2024 retro date, the new policy denies the claim. Maintaining a continuous retroactive date — or buying tail (ERP) coverage on leaving a profession — is the most tested E&O concept.

Test Your Knowledge

An E&O policy is claims-made with a retroactive date of January 1, 2024. A negligent act occurred on March 1, 2023, and the claim is first made on September 1, 2026, during the policy period. Is the claim covered?

A
B
C
D
Test Your Knowledge

Which exposure is typically covered by professional liability (E&O) rather than the CGL?

A
B
C
D