The Negligence Gap: Why Professional Indemnity Insurance Rarely Covers What UK Business Owners Assume It Does

There is a reassuring logic to the assumption that professional advisers carry insurance. Solicitors, accountants, financial advisers, and management consultants are required or strongly incentivised to hold professional indemnity cover, and the existence of that cover is routinely cited as a reason to engage external expertise with confidence. If the adviser makes a mistake, the insurance will respond. The loss will be compensated.

This assumption is, in many cases, wrong — or at least materially incomplete. Professional indemnity insurance is a complex and heavily qualified product. Its coverage is shaped by policy wording, exclusion clauses, notification requirements, and minimum terms that differ significantly across professions and insurers. The gap between what a business owner believes is covered and what is actually recoverable can be substantial, and the discovery of that gap typically occurs at the worst possible time: after a significant loss has already been incurred.

How Professional Indemnity Insurance Works — and Where It Breaks Down

Most professional indemnity policies are written on a claims-made basis. This means that the policy in force at the time the claim is notified to the insurer is the relevant policy — not the policy that was in force when the negligent act occurred. For a business owner bringing a claim against an adviser, this creates an immediate complication: if the adviser has changed insurer, allowed their cover to lapse, or reduced their coverage limit since the date of the negligent act, the policy available to meet the claim may be materially different from what existed when the advice was given.

Run-off cover — the insurance that advisers are supposed to maintain after ceasing practice or changing insurer — is intended to address this problem. In practice, run-off cover is not always maintained, particularly by sole practitioners or small firms that have wound down their activities. A business pursuing a claim against a former adviser who has retired or dissolved their practice may find that the insurance policy it expected to exist has not been renewed.

The Exclusion Landscape

Even where a policy is in force and the claim falls within the basic insuring clause, exclusions may defeat or limit recovery. Several categories of exclusion are particularly significant for business claimants.

Known circumstances exclusions operate to prevent coverage for matters that the insured was aware of, or ought reasonably to have been aware of, before the policy period commenced. If an adviser recognised that their advice might have been flawed and failed to notify their insurer promptly, a subsequent claim arising from that advice may be excluded on the basis that it relates to a known circumstance. The business owner, as the party bringing the claim, has no control over whether the adviser complied with their notification obligations — but bears the consequences if they did not.

Fraud and dishonesty exclusions are standard across virtually all professional indemnity policies. Where an adviser's conduct crosses the line from negligence into deliberate wrongdoing, the policy will typically not respond. This is particularly relevant in cases involving undisclosed commissions, deliberate concealment of conflicts of interest, or misappropriation of client funds. The business may have a valid claim for deceit or breach of fiduciary duty, but the insurance that was supposed to underpin the adviser's financial responsibility will not meet it.

Contractual liability exclusions can operate to exclude coverage where the adviser's obligation arose from a specific contractual term rather than from the general duty of care implied by law. This is relevant where engagement letters contain enhanced obligations — for example, a guarantee that the advice will produce a particular outcome — that go beyond what the law would otherwise impose. Advisers who include such terms may find them uninsured; businesses that negotiate them may find the contractual protection is hollow.

Aggregate policy limits present a further structural constraint. Professional indemnity policies are typically written with an aggregate limit — the maximum amount the insurer will pay across all claims in a given policy year. Where an adviser has faced multiple claims, or where a single claim by the business is large relative to the policy limit, the available coverage may be exhausted before the full loss is compensated.

The Adequacy Question

Separate from the question of whether a policy will respond is the question of whether the limit is sufficient. The regulatory minimum for many professional indemnity policies was set years ago and has not kept pace with the complexity or scale of commercial transactions. A solicitor advising on a significant acquisition may be required to hold only a fraction of the coverage that would be necessary to compensate the client in the event of a material error.

Business owners rarely enquire about the coverage limit of their advisers' policies before engaging them. The assumption is that regulated professionals will hold adequate insurance. In practice, there is significant variation in the limits carried by different firms, and a limit that is adequate for one type of instruction may be wholly inadequate for another.

Practical Safeguards for Business Clients

The appropriate response to these risks is not to abandon the use of professional advisers — it is to engage with them on different terms and with greater rigour.

Before engaging any adviser on a significant matter, businesses should request written confirmation of the adviser's current professional indemnity coverage, including the insurer, the policy period, the limit of indemnity, and any material exclusions applicable to the type of work being undertaken. Where the matter is sufficiently large, it is reasonable to request a copy of the declarations page.

Engagement letters should be reviewed carefully. An adviser who seeks to limit their liability through contractual caps or exclusion clauses is, in effect, reducing the value of the insurance that is supposed to protect the client. Any proposed limitation should be assessed against the scale of the potential loss and the adequacy of the cover available.

Where an adviser's insurance limit is materially lower than the potential exposure, businesses should consider whether additional contractual protections — such as personal guarantees from senior partners, parent company guarantees, or the instruction of multiple advisers on the same matter — are appropriate.

Finally, businesses should be alert to the notification obligations that apply under most professional indemnity policies. If a business becomes aware of a potential claim against an adviser, it should communicate that awareness promptly and in writing. Delay in asserting a claim can assist an adviser in arguing that notification obligations were not met, potentially jeopardising the insurer's willingness to respond.

A Structural Risk, Not an Exceptional One

At AC Norris Advisory, we regard the adequacy of adviser insurance as a routine element of commercial risk management rather than an exotic concern. The businesses most exposed to this risk are not those that have had bad experiences with negligent advisers — they are those that have not yet had such an experience and therefore have not had reason to examine the coverage that is supposed to protect them.

The professional indemnity gap is not a gap that advisers are motivated to draw attention to. It falls to the business owner, and to the advisers who serve them with genuine transparency, to ensure that the protection assumed to exist is the protection that actually does.