The policy period is the defined window — usually twelve months — during which a professional indemnity policy is on cover. Because PI is written on a claims-made basis, the policy period is the period in which a claim or circumstance must be notified to the insurer for cover to respond, not the period in which the underlying work was done.
What policy period means in PI insurance
The policy period is stated in the policy schedule between two dates: the inception date and the expiry date. For most UK PI policies this is a twelve-month period running from one annual renewal date to the next.
On a claims-made policy — which all standard UK PI is — the policy period defines when notification must take place for the policy to engage. A claim notified during the policy period falls within that policy’s response, even if the underlying alleged negligent act took place years earlier (provided the retroactive date allows). A claim notified after the policy period expires falls outside the policy’s response, even if the alleged act took place during the policy period.
This is the structural difference between claims-made and occurrence cover. On occurrence cover (which most public liability policies use, but PI does not) the policy period is the period during which the loss had to happen — notification could come later. On claims-made cover the policy period is the period during which notification must happen — the loss can have crystallised earlier.
The policy period also defines the period during which the aggregate limit (if any) is exposed, the period for which the premium is calculated, and the period during which any covered activities, geographic scope and other policy terms apply.
How policy period works in practice
Most UK PI runs annually. The firm completes a proposal form, the insurer quotes, the policy is bound at inception, runs for twelve months, and expires at midnight on the day before the next anniversary. The firm then renews — usually with the same insurer, sometimes by moving to a new market.
Within the policy period, the insurer is on cover for any claim or circumstance the firm notifies. The notification must reach the insurer in time, in the form required by the policy, and with sufficient detail to allow the insurer to investigate. Failure to notify a known circumstance during the policy period in which the firm became aware of it can prejudice cover under the policy that should respond.
When the policy expires and a new policy incepts the next day, the new policy takes over the role of the claims-made cover. Any claim notified after the previous policy expired falls to the new policy — provided the new policy’s retroactive date and terms allow.
The transition between consecutive policies is one of the highest-risk moments in PI cover. A claim that the firm became aware of during the expiring policy but did not notify until the renewal had already taken effect may fall between the two policies — the expiring policy says the firm didn’t notify it in time, the new policy says the firm knew about it before inception and should have disclosed. This is why brokers stress notification of circumstances before renewal.
Worked example with realistic numbers
A Bristol consultancy carries £500,000 PI with a policy period running 1 June 2025 to 31 May 2026, and renews on the same terms for 1 June 2026 to 31 May 2027.
Scenario A: Negligent advice given in March 2024. Client realises the loss in October 2025, complains in November 2025, formal claim notified to the insurer in December 2025. Cover responds under the 2025-26 policy because notification falls within the policy period and the work falls after the retroactive date.
Scenario B: Negligent advice given in October 2025. Client realises the loss in March 2026, complains in April 2026, formal claim notified to the insurer in May 2026. Cover responds under the 2025-26 policy. The underlying act happened during the policy period and so did the notification.
Scenario C: Negligent advice given in October 2025. Client doesn’t realise the loss until July 2026. Claim notified in July 2026. Cover responds under the 2026-27 policy — the new policy period. The underlying act happened during the 2025-26 period but notification happened during 2026-27. The 2026-27 policy responds (provided retroactive date allows).
Scenario D: Client complains by email on 28 May 2026, three days before policy expiry. The firm puts it in the pile to deal with after renewal. The firm notifies the insurer on 5 June 2026 under the new policy. The 2025-26 policy says: you knew of the circumstance during our period and did not notify. The 2026-27 policy says: you knew of it before our inception. Cover is in dispute and may be lost entirely.
Scenario D is the failure case the rest of the framework is designed to prevent. The fix is to notify the circumstance to the expiring insurer on 28 or 29 May, before the policy expires.
When this matters most
The policy period matters in three specific situations.
First, at renewal — and particularly when changing insurer. Every renewal is a transition point at which any known circumstance must be notified to the expiring insurer to be picked up under the right policy. Firms switching insurers face the additional risk that the new insurer may exclude known circumstances at the point of disclosure on the proposal form.
Second, when the firm changes legal entity or structure. A merger, demerger, sale of book, or change of partnership often involves the policy period ending on transaction completion rather than on the calendar renewal date. The new entity may need a new policy starting from completion; the old entity may need run-off cover to deal with notifications relating to the period before completion.
Third, when the firm has a long-tail exposure on past work. The longer the gap between the act and the claim, the more important it is that consecutive policies — going back to the firm’s start — have been in place without gap, with appropriate retroactive dates, so that whatever claim arises has a policy period it can attach to.
Common variations and market wording
Most policy periods sit in one of three structures.
Twelve-month annual. The standard. Inception on a fixed date, expiry twelve months later, renewable annually. Used by almost all UK PI on small to mid-sized firms.
Eighteen-month or longer. Occasionally seen when a firm extends the policy period to align with a financial year change or as part of a renewal accommodation. The premium is pro-rated. The aggregate limit (if any) usually re-sets at twelve months unless the wording specifies otherwise.
Short period. A policy taken for less than twelve months, usually as a bridging arrangement during a transaction. Premium is pro-rated. The firm needs to be clear about what happens when the short policy expires — usually a full annual policy is bound from expiry.
Continuous cover. Some wordings use language suggesting cover continues “until cancelled” rather than expiring at a fixed date. In practice this still operates on annual renewal cycles with the premium reviewed annually.
Extended reporting periods. Some policies offer a defined period after expiry during which the insured can still notify claims arising from work done before expiry. This is effectively a built-in short run-off. Not all policies offer it as standard.
Run-off. Distinct from policy period but related: run-off cover is a multi-year policy taken when a firm ceases trading to handle notifications arising from past work. Run-off has its own policy period — typically six years for solicitors and architects, twelve years for surveyors in some markets, set by the regulator or by the firm’s risk appetite.
Related concepts
The policy period operates alongside the claims-made versus occurrence distinction, the retroactive date (which controls how far back the policy reaches into past work), and run-off cover (which extends cover for notifications after the firm ceases trading). Circumstance notification is the mechanism by which firms preserve cover at policy-period transitions.
Frequently asked questions
What does policy period mean on a PI policy?
The policy period is the window — usually twelve months — during which a PI policy is on cover. On a claims-made policy, it is the period during which a claim or circumstance must be notified to the insurer for the policy to respond. The underlying alleged negligent act can have happened earlier, provided the retroactive date allows.
Is a PI policy period always twelve months?
In the UK market almost always, yes. Some short-period policies are written as bridging cover during a transaction or transition, and some renewals extend a policy by a few months to align with a financial year change, but the standard policy period for UK PI is twelve months from inception.
What happens at renewal — does cover continue?
If the firm renews — either with the same insurer or by placing a new policy with a different insurer — the new policy period starts from the day after expiry, providing continuous cover. Any claim or known circumstance must be notified to the expiring insurer before expiry; the new insurer takes over for matters arising after inception.
What if I notify a claim after the policy period ends?
On claims-made cover, the policy responding is the one in force when notification is made. If you notify after the policy period has ended and have not renewed, you may have no cover. If you have renewed, the new policy responds — provided its retroactive date and terms allow and the matter was not known before inception.
Can I extend the policy period mid-term?
Yes, with the insurer’s agreement and on payment of an additional premium. This is sometimes done when a firm needs cover during a transaction that runs beyond the originally-planned expiry. The aggregate limit treatment during the extended period varies — the wording should clarify whether the limit reinstates or continues.
What is an extended reporting period?
A defined window after policy expiry during which the insured can notify claims arising from work done before expiry. Not all policies offer it as standard — some include 30 to 90 days; others require the firm to purchase it. It is a partial substitute for run-off cover and useful as a buffer at renewal transitions.
Does the policy period reset the aggregate limit?
On most aggregate-limit PI policies, yes — the aggregate resets at each policy period inception. So a £500,000 aggregate that was exhausted in year one resets to £500,000 in year two on renewal. This makes the policy period boundary significant for any firm with multiple claims in a single year.
What happens to the policy period if I sell the firm?
The policy period typically expires on the day specified in the schedule, regardless of ownership change. The transaction documents and PI broker should address whether the existing policy continues to renewal, is replaced at completion, or is converted to run-off for pre-completion work while a new policy covers post-completion work.
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About Apex Insurance Brokers Ltd
Apex Insurance Brokers Ltd is a Bristol-based independent insurance broker authorised and regulated by the Financial Conduct Authority (firm reference number 724952). Companies House registered number 07014570. We arrange professional indemnity insurance for UK professional firms across architecture, surveying, accountancy, consultancy and related sectors. Contact: info@apexinsurancebrokers.co.uk or 0117 325 0027.
Last reviewed: May 2026 by Apex Insurance Brokers Ltd.
Important: this article is general information, not advice on your specific circumstances. For advice on PI insurance for your firm, contact us on 0117 325 0027 or info@apexinsurancebrokers.co.uk.