15.3 Professional Liability and Errors & Omissions

Why Professional Liability Exists

The Commercial General Liability policy covers bodily injury and property damage from premises and operations - but it excludes liability arising from the rendering of or failure to render professional services. A surgeon, accountant, architect, lawyer, or insurance agent who causes economic loss through a negligent act, error, or omission needs a separate professional liability / errors & omissions (E&O) policy.

The trigger is negligence in performing professional duties, and the harm is usually financial loss rather than physical injury - which is exactly the gap the CGL leaves open.

The Claims-Made Trigger and Retroactive Date

Almost all E&O is written claims-made, not occurrence. Three conditions must all be true for coverage:

1. The negligent act occurred on or after the retroactive date.
2. The claim is first made against the insured during the policy period (or an extended reporting period).
3. The claim is reported per policy terms.

The retroactive date is the firewall: a claim for an error that happened before the retro date is not covered, even if the claim is made during the policy period.

Why Professional Liability Is Separate From the CGL

The CGL covers bodily injury and property damage but excludes liability arising from professional services — the rendering or failure to render professional advice or treatment. Professionals therefore buy errors and omissions (E&O) or malpractice coverage for financial harm caused by negligent acts, errors, or omissions in their work, even when no physical injury occurs.

These policies are almost always written on a claims-made basis with a retroactive date, meaning the claim must be first made during the policy period and the negligent act must have occurred on or after the retro date. Many also include a consent-to-settle (hammer) clause: if the insured refuses to accept a settlement the insurer recommends, the insured may have to bear the difference if the case ultimately costs more — discouraging an insured from gambling on a trial with the insurer's money.

Tail Coverage and Why Claims-Made Gaps Open

Because professional liability is claims-made, the dangerous moment is when an insured changes carriers, retires, or lets coverage lapse. A claim reported after the policy ends is uncovered unless the insured buys an Extended Reporting Period (tail) from the expiring insurer, which extends the time to report claims for acts that occurred before expiration. Conversely, prior-acts (nose) coverage from a new insurer picks up acts predating the new policy by honoring the old retroactive date.

A worked example: an accountant retires; two years later a former client sues over a 2024 tax error. Without a tail, neither the lapsed policy (claim made after expiration) nor any new policy (none exists) responds, and the accountant pays personally. With a purchased tail, the expiring claims-made policy covers the late-reported claim. The exam reliably tests that retiring or switching professionals need tail or nose coverage to avoid a reporting gap.

Defense Costs: Inside vs. Outside the Limits

In most E&O policies, defense costs erode the limit - they are paid 'inside the limits' (a wasting or eroding limit). A $1,000,000 policy that spends $300,000 defending a case has only $700,000 left to pay a settlement.

Some higher-tier policies pay defense outside (in addition to) the limits, preserving the full indemnity limit for the judgment. This distinction drives premium and is a common exam point.

Worked example: $1,000,000 limit, defense inside the limits, $400,000 in defense costs, $800,000 settlement. The insurer's maximum is $1,000,000, so it pays $400,000 defense + $600,000 toward the settlement; the insured personally owes the remaining $200,000.

Consent-to-Settle (the 'Hammer' Clause)

Professional liability policies often contain a consent-to-settle provision: the insurer cannot settle a claim without the insured's consent, because a settlement can damage a professional's reputation. To discourage the insured from refusing a reasonable settlement, the policy adds a 'hammer clause': if the insured refuses to consent to a settlement the insurer recommends, the insurer's liability is capped at the amount it could have settled for plus defense to that date. The insured bears any excess.

Medical malpractice policies frequently include consent-to-settle; many other E&O lines do not, letting the insurer settle to control costs.

Bridging the Gaps: Tail and Nose Coverage

Because claims-made coverage stops responding once the policy ends, two devices bridge the gap:

• Extended Reporting Period (ERP), or 'tail' - extends the time to report claims for acts that occurred before expiration. A basic tail is automatic and short (e.g., 60 days); a supplemental tail is purchased and can run years. Tail coverage matters when an insured retires or the policy is non-renewed.
• Prior Acts ('nose') coverage - when switching insurers, the new policy can pick up the retroactive date of the old policy, covering acts back to the original retro date so the insured does not have to buy a tail.

Rule of thumb: buy a tail when you are leaving claims-made coverage; arrange prior acts / nose when you are entering a new claims-made policy and want to keep your old retro date.