FCA authorised · FRN 7249520117 325 0027Quote & buy →
Reviewed by Matthew Bartlett, Director · Last reviewed 2026-06-22
On a claims-made professional indemnity policy, the trigger is either a claim made against the insured during the policy period or a circumstance notified during the policy period that later matures into a claim. The two categories are not interchangeable, and the wording of each policy determines what counts as which. Getting the distinction right is not a drafting nicety — it decides which policy year answers, which limit and excess apply, and whether the insurer is on risk at all. A firm that mis-labels a serious problem as a minor query, or that notifies nothing because the issue still feels speculative, can find years later that the cover it was relying on never engaged.
Professional indemnity is written on a claims-made basis precisely because professional errors surface long after the work is done. A drawing signed off today may not be tested until a building moves; an audit opinion may not be challenged until an administrator is appointed. The circumstance mechanism is the bridge that lets a firm capture a known problem inside the year it becomes aware of it, even though the financial demand — the claim — may not arrive for years. Understanding how that bridge is built, and what can cause it to fail, is the single most valuable piece of policy literacy a professional firm can hold.
A standard PI policy indemnifies the firm against its legal liability to third parties for civil claims arising from the conduct of the professional business — typically negligence, breach of professional duty, and often breach of contract, breach of warranty of authority, defamation, and unintentional infringement of intellectual property. Crucially, the policy also funds the cost of defending those claims, including solicitors, counsel, experts and, where the insurer agrees, the cost of investigating and mitigating a notified circumstance before any demand is made. Most wordings extend to loss of documents, dishonesty of employees, and the cost of attending court or a disciplinary hearing.
The point that firms most often overlook is that defence costs and the duty to indemnify both hinge on a valid notification. If a circumstance is notified correctly, the insurer's obligation to fund investigation and defence attaches to the year of notification. If it is not, the firm may be paying its own lawyers while it argues with the insurer about which year should respond. The cover, in other words, is only as good as the notification discipline behind it.
The leading English authority is Kajima UK Engineering Ltd v The Underwriter Insurance Co Ltd [2008], which set the test for what amounts to a notifiable circumstance — a problem that a reasonable insured would identify as something that may give rise to a claim, not merely a remote possibility. The test is objective. A circumstance that is too vague to articulate, or that captures every matter the firm is currently working on, is unlikely to constitute a valid notification. Conversely, a problem that the firm has spotted in its own work product, where the client has raised a concern, or where the matter is going wrong in a documented way, will usually be notifiable.
Two practical lessons flow from that objective standard. First, a blanket or hindsight notification — a general statement that "anything on this project might one day go wrong" — will rarely satisfy the test, because it identifies no specific problem that a reasonable insured could point to. Second, the causal link matters: a valid circumstance notification must describe a problem capable of giving rise to a claim, not merely a strained relationship or a late-paid invoice. Firms that treat the circumstance clause as a filing cabinet for every awkward moment tend to find their notifications carry no weight when it matters.
A claim, in PI policy language, is typically a written demand for compensation or a written assertion of a right that, if successful, would result in liability. Pre-action correspondence under the Civil Procedure Rules pre-action protocols almost always amounts to a claim. An informal email from a disgruntled client may or may not — it depends on whether a reasonable reader would treat it as an assertion of a right. The word "claim" is defined in each policy schedule, so the safe course is always to read the specific wording rather than assume the general position applies.
A notified circumstance does not become a claim until something external happens — a letter of claim, the issue of proceedings, an adjudication notice, or an explicit demand for compensation. Once that happens, the matter is treated as a claim under the policy year in which the circumstance was notified. This is the deemed-claim mechanism that protects a firm whose circumstance is notified in 2026 but whose claim does not arrive until 2031. Without it, a firm that had changed insurer, seen its limit reduced, or ceased trading in the intervening years could be left with no effective cover for a problem it had spotted and reported in good time.
The obligation to disclose a known circumstance at renewal is where the two regimes meet. Under the Insurance Act 2015, the firm owes a duty of fair presentation of the risk at each renewal, and a circumstance the firm knows about is a material fact. A problem left unnotified in one year does not simply disappear — it becomes a known circumstance that must be disclosed, and it will usually be excluded from the following year's cover as a matter the firm was already aware of. That is why the safest home for a genuine problem is the year in which it first became apparent.
Because a circumstance freezes the claim into the year of notification, the limit of indemnity a firm buys today is really the limit that will answer for problems it becomes aware of today — however long the eventual claim takes to arrive. Sizing that limit is therefore an exercise in looking forward at the firm's exposure, not backward at last year's claims. The starting points are the value of the projects or advice the firm handles, the contractual limits of liability it is asked to accept, any regulatory minimum that applies to the profession, and the aggregation risk — the chance that several related errors collapse into a single claim against a single limit.
Some regulated professions carry a compulsory minimum level of cover set by their regulator or professional body; for solicitors, the Solicitors Regulation Authority's minimum terms and conditions set that floor. A minimum, however, is a floor and not a recommendation. Firms whose contracts routinely expose them to seven-figure losses, or whose work is long-tail in nature, commonly buy well above any mandatory figure and consider the interaction between the per-claim limit, the aggregate limit and the excess. Because the notified-circumstance mechanism ties everything back to a single policy year, a firm that under-buys in the year a cluster of problems emerges cannot top up the limit after the event — the cover is fixed at the moment of notification.
A structural engineer reviews a completed design and realises a load calculation may have been understated. Nothing has gone wrong on site and the client has not complained. This is a classic notifiable circumstance: a specific problem in the firm's own work product that a reasonable insured would see as something that may give rise to a claim. Notified now, it locks into the current year even if remedial costs are demanded three years later.
A surveyor receives a solicitor's letter under the professional negligence pre-action protocol alleging an under-valuation. This is a claim, not a circumstance — the claims clause engages, the short notification stop applies, and the claims control and cooperation duties bite. The firm must not admit liability or instruct its own solicitors on quantum without insurer consent.
An architect gets a terse email from a developer complaining that a project is over budget, with no allegation of professional error. On its own this may be neither a claim nor a valid circumstance, because there is no identified problem in the firm's work that could found liability. The safe course is to record it, watch it, and notify the moment it acquires substance — an allegation of defective design, for example — rather than lodge a vague protective notification that later fails the objective test.
For long-tail professions — architects, engineers, quantity surveyors and consulting surveyors — the gap between a circumstance and a claim can run for years. A circumstance notified to the 2026 policy crystallises into a claim served in 2030 against the 2026 policy's limit, terms and excess. For solicitors, the SRA MTC sets specific aggregation rules that interact with this timing.
A firm that notifies a vague circumstance to keep options open may find later that the policy did not respond because the circumstance was not sufficiently particularised. A firm that fails to notify a known issue, treating it as too speculative, may find at renewal that the matter is now a known circumstance and excluded from the new year's cover. Apex helps the firm draw the line on the day, in writing, with the insurer's acknowledgement on file.
No. A vague or blanket notification that fails the objective test in Kajima gives no protection, and a flood of speculative notifications can affect how underwriters view the firm at renewal. The better discipline is to notify specific, articulable problems promptly and to keep a contemporaneous record of the rest.
A notified circumstance is not itself a claim, but insurers record it and it forms part of your claims experience disclosed at renewal. If it later crystallises, it is treated as a claim against the year you notified it, not the year the demand arrived.
The deemed-claim mechanism resolves this. If you validly notified the circumstance in the earlier year, any later claim is deemed made in that earlier year and answered by that policy's limit and terms — which is why timely notification protects you even after you change insurer.
On most wordings, yes. The claims control and claims cooperation clauses reserve conduct of the defence to the insurer. Instructing your own lawyers or admitting liability without consent can prejudice cover, so engage the insurer first and follow the panel arrangements.
The Act requires a fair presentation of the risk at inception and renewal. A circumstance you know about is material, so it must be disclosed. Notifying it in the correct year, and disclosing it at the next renewal, keeps you on the right side of the duty and preserves the cover for that problem.
Apex Insurance Brokers serves UK professional services firms and commercial businesses. Call 0117 325 0027, email info@apexinsurancebrokers.co.uk, or request a quotation.
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