15.3 Professional Liability and Errors & Omissions
Key Takeaways
- Professional liability/E&O covers financial loss from errors, omissions, or negligent professional acts - the CGL excludes professional services.
- Most professional liability is claims-made: the act must follow the retroactive date AND the claim must be reported during the policy period or an Extended Reporting Period (tail).
- Basic (mini) tails are automatic and short; supplemental tails are purchased and can be longer or unlimited.
- Consent-to-settle (hammer) clauses shift excess liability to an insured who refuses a recommended settlement.
- Defense-within-limits (eroding) policies let defense costs reduce the available limit, unlike the CGL where defense is paid in addition to limits.
Professional Liability and Errors & Omissions
Professional liability covers economic loss caused by a professional's error, omission, or negligent act in rendering or failing to render professional services. The CGL specifically excludes professional services, which is why these exposures need a separate policy. Terminology varies by profession: physicians buy medical malpractice, lawyers/architects/accountants buy errors & omissions (E&O), and insurance agents buy agents E&O. All share a key feature: they cover financial injury, not just bodily injury or property damage.
Claims-Made vs. Occurrence
Most professional liability is written on a claims-made basis, unlike the occurrence-based CGL. Two dates control coverage:
- Retroactive date - the wrongful act must occur on or after this date.
- Policy period - the claim must be first made during the policy period (or an extended reporting period).
A claim is covered only when both conditions are met: the act happened after the retro date AND the claim was reported during the active period or tail.
The Claims-Made Trigger Table
| Scenario | Act Date | Claim Made | Covered? |
|---|---|---|---|
| A | After retro date | During policy period | Yes |
| B | Before retro date | During policy period | No (pre-retro act) |
| C | After retro date | After policy expires, no tail | No (late report) |
| D | After retro date | During ERP/tail | Yes |
The Extended Reporting Period (ERP), or "tail," lets the insured report claims after the policy ends for acts during the covered period. A basic (mini) tail is automatic and short (often 60 days); a supplemental tail is purchased and may be unlimited in duration.
Consent-to-Settle and Defense-Within-Limits
Professional policies often contain a consent-to-settle ("hammer") clause: the insurer cannot settle without the insured's consent, but if the insured refuses a settlement the insurer recommends, the insured may become responsible for amounts above that figure. Many professional and E&O policies are also defense-within-limits (eroding/"wasting" limits) - defense costs reduce the available limit, unlike the CGL where defense is paid in addition to limits. This is a heavily tested distinction.
Worked Eroding-Limits Example
An architect's E&O policy has a $1,000,000 limit on a defense-within-limits basis with a $25,000 deductible. Defense costs reach $300,000 and a settlement of $800,000 is reached.
Because defense erodes the limit: $300,000 defense + $800,000 settlement = $1,100,000 demanded against a $1,000,000 limit. The insurer pays only up to the $1,000,000 limit (after the insured's $25,000 deductible obligation), leaving roughly $100,000 uninsured. Under a CGL (defense outside limits), the full $1M indemnity would remain available for the settlement.
A claims-made E&O policy has a retroactive date of 1/1/2024. The negligent act occurred 6/1/2023, and the claim was first made 3/1/2026 while the policy was active. Is the claim covered?
On a defense-within-limits E&O policy with a $1,000,000 limit, $300,000 of defense costs are incurred and an $800,000 settlement is reached. How much of the settlement obligation is uninsured?
Why Professional Liability Is Separate and Claims-Made
Professional liability / errors and omissions (E&O) covers harm from rendering or failing to render professional services — economic loss caused by a mistake, bad advice, or omission. The CGL is not the right form because it covers bodily injury and property damage from an occurrence, not the pure economic loss a professional's error typically causes. Medical professionals' version is malpractice; lawyers, accountants, agents, architects, and consultants buy E&O; technology firms buy tech E&O / cyber.
Most professional liability is written claims-made with a retroactive date, because professional errors surface long after the work and insurers need to control the reporting tail. The trigger requires the claim to be first made during the policy period (or ERP) and the wrongful act to have occurred on or after the retro date.
| Feature | Typical professional liability |
|---|---|
| Trigger | Claims-made with retro date |
| Loss covered | Economic loss from professional error/omission |
| Defense | Often inside the limits (eroding) |
| Settlement | Often subject to consent-to-settle (hammer clause) |
Consent-to-Settle, Eroding Limits, and a Worked Example
Two provisions distinguish E&O from the CGL. The consent-to-settle (hammer) clause requires the insured's consent to settle a claim; if the insured refuses a settlement the insurer recommends, a hammer provision can cap the insurer's payment at the amount it could have settled for, leaving the insured to fund any excess. Defense within the limits (eroding or "wasting" limits) means defense costs reduce the available limit, unlike the CGL where defense is paid in addition.
Worked eroding-limits example: An E&O policy has a $1,000,000 limit with defense inside the limits and a $25,000 deductible. The insurer spends $300,000 defending a claim that settles for $800,000. Because defense erodes the limit, the total drawn is $300,000 + $800,000 = $1,100,000, which exceeds the $1M limit — so the insurer pays only $1,000,000 total (defense plus indemnity), and the insured covers the remaining $100,000 plus the deductible. This is the opposite of the CGL's supplementary-payments structure and a frequent exam contrast: on a wasting-limits E&O policy, a long defense can consume the money meant to pay the claimant.
Matching the Professional to the Right Form, and the Tail
Different professions buy tailored versions of E&O, and a question may ask which form fits a given client. Insurance agents and brokers carry agents E&O for negligent advice or failing to place requested coverage; physicians, nurses, and hospitals carry medical malpractice; lawyers, accountants, and architects/engineers carry profession-specific E&O; technology and data firms carry tech E&O / cyber, which blends professional services with privacy and network exposures. The common thread is financial loss caused by a professional mistake, not bodily injury or property damage.
Because professional liability is claims-made, the retroactive date and tail rules from the trigger chapter apply directly. A retiring professional, or one switching insurers, must address the long tail of late-emerging claims: buy a supplemental extended reporting period (tail) on the expiring policy, or have the new insurer accept the prior retro date. A professional who simply lets a claims-made policy lapse with no tail is exposed for every past act not yet reported.
Exam takeaway: When a fact pattern describes a producer who failed to add requested flood coverage, an accountant who missed a filing deadline, or an architect whose design error caused purely economic loss, the answer is professional liability / E&O, written claims-made, with attention to the retro date, the consent-to-settle (hammer) clause, and defense-within-limits erosion — never the occurrence-based CGL.