15.3 Professional Liability and Errors & Omissions
Key Takeaways
- Professional liability covers economic loss from negligent acts, errors, or omissions in rendering professional services - not bodily injury/property damage like CGL
- Most E&O and malpractice policies are written on a claims-made basis with a retroactive date and an Extended Reporting Period (tail)
- Medical malpractice and many E&O forms require the insured's consent to settle (a 'hammer clause' modifies this)
- Defense costs are commonly inside the limit (eroding/wasting limits), unlike the CGL where defense is outside the limit
What professional liability covers
Professional liability (also called errors and omissions, or E&O, and malpractice for medical/legal professionals) responds to claims arising from the rendering of - or failure to render - professional services. The injury is usually financial / economic loss caused by negligence, mistakes, or bad advice, not the bodily injury or property damage covered by a Commercial General Liability (CGL) policy.
The CGL explicitly excludes professional services. An accountant who misfiles a client's taxes, an architect whose design fails, or a real-estate agent who omits a disclosure all face E&O claims, not CGL claims. This is a frequent exam trap: do not route a professional-mistake claim to the CGL.
| Profession | Policy name |
|---|---|
| Physician, surgeon | Medical malpractice |
| Attorney | Lawyers professional liability |
| Accountant, architect, consultant | Errors & omissions (E&O) |
| Insurance agent/broker | Agents E&O |
| Corporate directors | D&O (covered in 15.4) |
Claims-made trigger, retroactive date, and tail
Most professional liability is written claims-made, not occurrence. Under a claims-made form, coverage is triggered by the claim being first made against the insured during the policy period (and reported), regardless of when the act occurred - provided the act happened on or after the retroactive date.
- Retroactive date: the earliest date a covered act may have occurred. Acts before this date are NOT covered. Advancing or losing the retro date creates a coverage gap.
- Extended Reporting Period (ERP) / 'tail': allows claims reported after the policy ends for acts during the policy period. A basic tail is automatic and short (e.g., 60 days); a supplemental tail is purchased for longer protection.
Worked timing example. A consultant's claims-made policy runs 1/1/2026-1/1/2027 with a retro date of 1/1/2023. A negligent act occurred 6/1/2024 (after retro) and the client sues 3/1/2026 (during the policy period). Covered. If the same act had occurred 1/1/2022 (before retro), it would be excluded even though the claim is made during the term.
Consent to settle, hammer clause, and defense costs
Consent to settle
Many malpractice and E&O policies contain a consent-to-settle ('I'm not liable') provision: the insurer cannot settle without the insured's permission, protecting the professional's reputation.
Hammer clause
To prevent insureds from refusing reasonable settlements, insurers add a hammer clause. If the insured refuses to consent to a settlement the insurer recommends, the insurer's liability is capped at the proposed settlement amount plus defense costs to that date. The insured then absorbs any excess.
Worked example. The insurer recommends settling for $200,000; defense costs so far are $30,000. The insured refuses, the case goes to trial, and the verdict is $500,000 (defense now $90,000). With a full hammer clause, the insurer pays only $200,000 + $30,000 = $230,000; the insured owes the remaining $270,000 plus the extra defense.
Defense within limits
Unlike the CGL (where defense costs are paid outside the limit), professional liability commonly pays defense inside the limit - so legal fees erode (deplete) the available limit. These are called eroding or wasting limits. A $1,000,000 limit with $300,000 of defense leaves only $700,000 for settlement.
A consultant's claims-made E&O policy runs 1/1/2026-1/1/2027 with a retroactive date of 1/1/2023. The negligent act occurred 1/1/2022; the client first sued on 3/1/2026. Is the claim covered?
An insurer recommends settling an E&O claim for $200,000 (defense to date $30,000). The insured invokes consent-to-settle and refuses; the verdict comes back at $500,000. Under a full hammer clause, what is the insurer's payment?
Medical Malpractice, Tail Coverage, and Exam Points
Professional liability splits along occupational lines. Errors & omissions (E&O) covers economic loss from professional mistakes (insurance agents, accountants, architects, lawyers). Medical malpractice and broader medical professional liability cover bodily injury from professional services and are almost always written claims-made.
| Feature | General Liability (CGL) | Professional Liability (E&O) |
|---|---|---|
| Injury type | Bodily injury, property damage | Economic loss, negligent service |
| Standard of care | Ordinary reasonable person | Specialized professional standard |
| Typical trigger | Occurrence | Claims-made |
| Defense costs | Usually outside limits | Often inside the limit (eroding) |
Three settle most questions. First, E&O does not require physical injury - pure financial harm from a negligent act suffices. Second, defense costs commonly erode the limit, so a large defense reduces what is left for indemnity. Third, when a professional switches insurers, an Extended Reporting Period (tail) or a matching retroactive date on the new policy is essential to avoid a coverage gap for old acts.
Defense-Within-Limits and the Hammer Clause
Two professional-liability features change how much money is really available and who controls settlement.
| Feature | What it means |
|---|---|
| Defense within limits (eroding/wasting limit) | Defense costs reduce the limit available for settlement |
| Defense outside limits | Defense paid in addition - the full limit stays for damages |
| Consent-to-settle | Insurer needs the professional's consent to settle a claim |
| Hammer clause | If the insured refuses a recommended settlement, the insurer caps its payment at the rejected amount |
Exam Trap: A soft hammer shares the excess (e.g., 70/30) between insurer and insured when the insured refuses to settle, whereas a full hammer makes the insured responsible for all loss and defense beyond the amount the claim could have settled for. This is why the consent-to-settle right carries real financial consequences.
Quick Recall - E&O Exam Essentials
Four facts answer most professional-liability questions:
- E&O covers economic loss from negligent professional service, not bodily injury - pure financial harm suffices.
- Coverage is almost always claims-made, so the retroactive date and tail (ERP) govern late claims.
- Defense costs frequently erode the limit, reducing what remains for settlement.
- A consent-to-settle / hammer clause can shift excess loss to the professional who refuses a reasonable settlement.
Matching the right professional to the right form - E&O for advisors, medical malpractice for clinicians - is the recurring distinction the exam draws.