11.6 Professional Liability Insurance

What Professional Liability Covers

Professional liability — also called Errors and Omissions (E&O) — pays for economic loss a client suffers because a professional's work was negligent, mistaken, or incomplete. This is fundamentally different from commercial general liability (CGL), which covers bodily injury and property damage. In fact, the CGL has a professional services exclusion, which is exactly why a separate E&O policy is needed.

Quick Answer: General liability covers physical harm to others; professional liability covers financial harm caused by the professional's advice or services.

Claims-Made: The Defining Trigger

Unlike the occurrence trigger on a CGL (which responds based on when the injury happened), most professional liability is claims-made: coverage applies only if the claim is first made during the policy period and the wrongful act occurred on or after the retroactive date.

Why claims-made? Professional mistakes surface years later (a missed tax election, a design flaw). Claims-made lets insurers cap their exposure to identifiable policy periods. When a professional retires or switches carriers, tail coverage prevents a gap for past work.

Worked Example: Retroactive Date and Tail

An architect buys a claims-made E&O policy with a retroactive date of 1/1/2023. In 2026 a client sues over a design defect.

• If the design work was done in 2024 (after the retro date) and the claim is reported during the current policy term, it is covered.
• If the design dated to 2021 (before the retro date), it is excluded, even though the claim is filed during the policy period.
• If the architect lets the policy lapse in 2026, buying a tail (Extended Reporting Period) preserves coverage for claims later made over 2024–2025 work.

Major Specialty Forms

Directors & Officers (D&O)

Protects corporate leaders from personal liability for management decisions (breach of fiduciary duty, mismanagement, securities claims).

Employment Practices Liability (EPL)

Covers claims by employees: wrongful termination, discrimination (age, race, sex, disability), sexual harassment, retaliation, and failure to promote — exposures the CGL and D&O largely exclude.

Cyber Liability

The fastest-growing line, split into two halves:

Common Exam Traps

• Claims-made vs. occurrence — E&O is claims-made; CGL is occurrence. Read the trigger language.
• Retroactive date controls when the act occurred; the policy period controls when the claim is made. Both tests must pass.
• Tail = report later, not act later — it extends the reporting window for prior acts, not new wrongdoing.
• D&O Sides — Side A protects individuals when the firm can't pay; Side C protects the entity.
• CGL excludes professional services — that exclusion is the reason E&O exists.

Claims-Made Maturity: Tail vs. Nose Coverage

Two gap-fillers travel with claims-made policies and are routinely confused. Tail coverage — formally the Extended Reporting Period (ERP) — is purchased when a policy ends, extending the time to report claims for acts that occurred during the expired term. A basic ERP is often automatic for a short window (e.g., 60 days), while a supplemental ERP is bought for a longer period (one to several years, sometimes unlimited).

Nose coverage (prior-acts coverage) is the mirror image: when a professional switches carriers, the new claims-made policy can be written to honor the retroactive date of the old one, covering pre-inception acts so the insured is not forced to buy a tail from the departing insurer. The exam tests the direction: tail looks forward in reporting time for old acts; nose reaches backward to pick up the prior retro date.

Defense Costs and the Eroding Limit

A structural feature distinguishing many professional liability policies from the CGL is how defense costs interact with the limit. Most CGLs pay defense in addition to the limit. By contrast, professional liability and management-liability forms are frequently written with defense within limits (also called "eroding" or "wasting" limits): every dollar spent on attorneys, experts, and litigation reduces the amount left to pay a settlement or judgment. A $1,000,000 E&O limit consumed by $300,000 of defense leaves only $700,000 for indemnity.

Because professional and securities claims are litigation-intensive, candidates must recognize that the headline limit on an eroding-limits policy overstates the money truly available to resolve a claim — a recurring source of exam scenarios and real-world disputes.