Professional indemnity insurance

Professional indemnity insurance is a contract of insurance that indemnifies a professional firm or individual against legal liability to third parties arising from negligent acts, errors or omissions in the provision of professional services, together with associated defence costs.

Definition §

Professional indemnity insurance, commonly abbreviated to PI insurance, is a liability product purchased by individuals and firms that provide advice, design or other professional services. It responds to claims made by clients and, in some forms, third parties, alleging that the policyholder has caused financial loss through a negligent act, error or omission committed in the course of professional duties ^[1].

The cover is structured on a 'claims made' basis, meaning the policy that responds is the one in force at the date a claim is first made against the insured, not the policy in force when the underlying act took place. This differs materially from occurrence-based liability products such as public liability insurance and employers' liability insurance ^[1]. The claims made structure makes the retroactive date a defining feature of every PI contract, because the policy will only pick up acts committed after that date.

Modern wordings typically express the insuring clause as a civil liability trigger, providing a broader response than older 'negligence only' wordings. A civil liability wording responds to any legal obligation to pay damages, irrespective of the cause of action, subject to the policy exclusions ^[1]. Extensions commonly bolted on to the core insuring clause include defamation cover, IP infringement cover, loss of documents and breach of confidentiality.

PI is mandated by statute, regulator or professional body for a number of regulated professions, including solicitors, insurance and mortgage intermediaries, architects, chartered surveyors, accountants in practice and financial advisers ^[2][3][4].

Legal / Regulatory basis §

PI insurance is a contract of insurance within the meaning of the Financial Services and Markets Act 2000 (FSMA), and its sale is therefore a regulated activity carried on by firms authorised under section 19 FSMA ^[5]. For insurance intermediaries the relevant prudential regime is contained in the FCA's Prudential Sourcebook for Mortgage and Home Finance Firms and Insurance Intermediaries (MIPRU). MIPRU 3.2.7R sets out the minimum PI requirements for insurance intermediaries, including minimum limits of indemnity expressed by reference to the Insurance Distribution Directive thresholds ^[6].

For solicitors, the Solicitors Regulation Authority publishes the SRA Indemnity Insurance Rules and the SRA Minimum Terms and Conditions (MTC), which prescribe a minimum limit of £2m per claim (£3m for incorporated practices), a civil liability trigger, prohibition on certain exclusions and mandatory run-off ^[3]. RICS, ARB and ICAEW operate analogous regimes for surveyors, architects and chartered accountants ^[4][7][8].

The substantive law governing the formation, interpretation and remedies of a PI contract is the Insurance Act 2015, which replaced the duty of utmost good faith with a duty of fair presentation of the risk for non-consumer policyholders ^[9]. The Act is supplemented in part by surviving provisions of the Marine Insurance Act 1906 and, for consumers, by the Consumer Insurance (Disclosure and Representations) Act 2012 ^[10][11]. The Enterprise Act 2016 introduced the implied term as to claims handling now codified in section 13A of the Insurance Act 2015 ^[12].

Common-law principles continue to shape the scope of professional liability that PI responds to, particularly the duty of care formulations in Hedley Byrne & Co Ltd v Heller & Partners Ltd and Caparo Industries plc v Dickman ^[13][14], and the standard of care articulated in the Bolam and Bolitho line of authority ^[15][16].

How it works in practice §

A PI policy is purchased annually and operates between an inception date and an expiry date, normally twelve months apart. During that period any claim first made against the insured, and notified to insurers as required by the policy, is potentially covered subject to the policy's terms, conditions, exclusions, limit and excess.

The insuring clause sets the trigger. A typical civil liability wording will indemnify the insured against 'all sums which the insured shall become legally liable to pay as damages' for any civil liability arising from the conduct of the professional business ^[1]. Defence costs are usually covered in addition to the per-claim limit or within the aggregate limit, depending on wording.

The limit of indemnity may be structured as 'any one claim' (each claim has the full limit available) or in the aggregate (the limit is the maximum payable across all claims in the period). Many policies blend the two, with the aggregate applying to specific extensions or to the policy as a whole. The aggregation clause determines when multiple notifications are treated as a single claim against the limit; the Supreme Court's analysis in AIG Europe Ltd v Woodman remains the leading authority on the meaning of 'series of related matters' ^[17].

Exclusions are an integral part of every wording. Standard exclusions include the dishonesty exclusion, the insolvency exclusion (often restricted or removed in minimum terms regimes) and the known circumstances exclusion, which prevents the insured from claiming on a new policy for matters they were aware of before inception.

On cessation of practice the firm typically purchases run-off coverage to extend the claims made trigger beyond the date the business stops trading, since claims may emerge for many years after the underlying advice was given ^[3].

Common variations §

A number of distinct PI structures are encountered in the UK market.

Civil liability wordings are the modern default, particularly in regulated professions where the wording is prescribed. They respond to any breach of legal duty, subject only to specific exclusions ^[3].

Negligence-only wordings remain in use in parts of the SME market and respond only to liability in the tort of negligence, which can leave gaps for contractual liability assumed in retainers or for breaches of statutory duty.

Sole practitioner cover and partnership cover reflect the different legal personalities through which a professional service may be delivered. An LLP requires LLP PI extended to cover the entity as well as the individual members.

Run-off cover is purchased once a firm ceases practice. The SRA MTC requires solicitors to obtain six years' run-off ^[3]; other regulators set their own periods.

Prior acts coverage, sometimes called nose cover, picks up work done before inception by retreating the retroactive date into the past. Its counterpart, continuous coverage clause, preserves cover for circumstances notified during an earlier policy period when the same insurer is renewed without interruption.

For solicitors, the Solicitors Indemnity Fund provides post six-year run-off cover, while the Solicitors Compensation Fund operates as a discretionary fund of last resort under section 36 of the Solicitors Act 1974 ^[18].

Example §

An illustrative scenario: a small chartered surveying practice undertakes a homebuyer's report on a residential property in March 2024. The report fails to flag visible signs of subsidence. The purchaser completes and, in November 2026, instructs solicitors after the cracks worsen. A letter of claim is served on the surveyor in January 2027.

The policy that responds is the one in force in January 2027, when the claim is first made and notified, provided the retroactive date predates March 2024. If the surveyor changed insurer in May 2025 without taking out prior acts coverage, the 2027 insurer would still respond, because under a claims made trigger it is the date of the claim, not the date of the act, that matters — subject always to the retroactive date and the known circumstances exclusion. The illustrative settlement of £85,000 plus £25,000 defence costs would be applied against the per-claim limit and excess.

See also §

• /wiki/civil-liability/ — the modern PI insuring trigger
• /wiki/negligent-act-error-or-omission/ — the classic narrower formulation
• /wiki/retroactive-date/ — the date from which acts are covered
• /wiki/run-off-coverage/ — post-cessation cover
• /wiki/aggregation-clause/ — how multiple claims combine
• /wiki/insurance-act-2015/ — the governing statute
• /wiki/dishonesty-exclusion/ — a near-universal exclusion
• /wiki/known-circumstances-exclusion/ — interaction with claims made trigger
• /wiki/solicitors-indemnity-fund/ — post six-year run-off for solicitors

References §

1. ↑ Insurance Act 2015 — https://www.legislation.gov.uk/ukpga/2015/4
2. ↑ Financial Services and Markets Act 2000, section 19 — https://www.legislation.gov.uk/ukpga/2000/8
3. ↑ SRA Indemnity Insurance Rules and SRA Minimum Terms and Conditions of Professional Indemnity Insurance — https://www.sra.org.uk
4. ↑ RICS Rules of Conduct (2022) — https://www.rics.org
5. ↑ Financial Services and Markets Act 2000, section 19 — https://www.legislation.gov.uk/ukpga/2000/8
6. ↑ FCA Handbook, MIPRU 3.2.7R — https://www.handbook.fca.org.uk
7. ↑ ARB Code of Conduct — https://www.arb.org.uk
8. ↑ ICAEW Code of Ethics — https://www.icaew.com
9. ↑ Insurance Act 2015, section 3 — https://www.legislation.gov.uk/ukpga/2015/4
10. ↑ Marine Insurance Act 1906 — https://www.legislation.gov.uk/ukpga/Edw7/6/41
11. ↑ Consumer Insurance (Disclosure and Representations) Act 2012 — https://www.legislation.gov.uk/ukpga/2012/6
12. ↑ Enterprise Act 2016, Part 5 — https://www.legislation.gov.uk/ukpga/2016/12
13. ↑ Hedley Byrne & Co Ltd v Heller & Partners Ltd [1964] AC 465 (HL)
14. ↑ Caparo Industries plc v Dickman [1990] 2 AC 605 (HL)
15. ↑ Bolam v Friern Hospital Management Committee [1957] 1 WLR 582
16. ↑ Bolitho v City and Hackney Health Authority [1998] AC 232 (HL)
17. ↑ AIG Europe Ltd v Woodman [2017] UKSC 18, [2017] 1 WLR 1168
18. ↑ Solicitors Act 1974, section 36 — https://www.legislation.gov.uk/ukpga/1974/47