Professional indemnity (PI) insurance covers the legal costs and damages arising from claims that a professional's advice, design, or service caused a client financial loss. PI is compulsory for solicitors (SRA minimum), surveyors (RICS minimum), accountants (ICAEW/ACCA requirements), financial advisers (FCA minimum), and architects (ARB requirement). For other professions, PI is increasingly required by client contracts and public sector procurement frameworks. Hiscox, Markel, and Travelers are the most frequently cited PI underwriters for UK professional services firms. PI policies operate on a claims-made basis - the policy in force when the claim is made pays, not the policy in force when the work was done.
Last reviewed May 2026
Professional indemnity insurance is the primary liability cover for any business that provides advice, design, consulting, or professional services for a fee. Unlike public liability insurance (which covers physical injury or property damage to third parties), PI covers the financial loss a client suffers as a result of negligent advice or service - loss that can substantially exceed the fees charged for the work that caused it. A consultant charging £10,000 for a project whose negligent advice leads to a client suffering £500,000 of losses faces a claim that no general business insurance policy covers without a specific PI section. For regulated professions in the UK, maintaining PI insurance at the required minimum limit is a condition of professional practice, and failure to do so can result in suspension of the right to practise.
Regulatory Requirements for PI Insurance by Profession
Multiple UK professional regulators mandate PI insurance as a condition of registration, authorisation, or membership. The requirements vary by regulator and profession.
Solicitors regulated by the Solicitors Regulation Authority (SRA) must maintain PI insurance with a minimum limit of £2 million per claim for sole practitioners and partnerships, and £3 million per claim for incorporated practices. The SRA specifies the minimum terms and conditions that a policy must include (the SRA Minimum Terms and Conditions) and maintains a list of qualifying insurers. Solicitors who fail to maintain qualifying PI cover must cease practice immediately.
Surveyors and valuers regulated by the Royal Institution of Chartered Surveyors (RICS) must maintain PI insurance with minimum limits that vary by annual fee income: £250,000 per claim for firms with fee income up to £100,000; £500,000 for fee income up to £200,000; and £1 million for fee income above £200,000. The RICS also specifies minimum terms and a run-off cover requirement when a firm ceases practice.
Accountants regulated by ICAEW or ACCA must maintain PI insurance as a condition of their practising certificate. The FCA requires all directly authorised financial advisers and IFAs to maintain PI insurance with minimum limits specified in the FCA's IPRU(INS) and COBS sourcebooks. Architects regulated by the Architects Registration Board (ARB) must maintain PI insurance under the ARB's code of practice, though the ARB does not specify minimum limits - the RIBA's guidance recommends minimum limits based on project value.
How Claims-Made Policies Work and Why Run-Off Cover Matters
PI policies in the UK are written on a claims-made basis: the policy in force at the time the claim is made (or the circumstance is notified) responds to the claim, regardless of when the work that gave rise to the claim was performed. This is fundamentally different from an occurrence-based policy (such as most EL and PL policies) where the policy in force at the time of the incident responds.
The practical consequence is significant. A firm that provided consulting services in 2022, allowed its PI policy to lapse in 2024, and receives a claim from that 2022 client in 2026 has no PI cover - there is no policy in force at the time the claim is made. This is why run-off cover (or extended reporting period cover) is essential when a professional services firm ceases trading, retires, or merges with another firm. Run-off cover extends the reporting period of the last policy in force for a defined period (typically six years, aligning with the Limitation Act 1980 window for negligence claims) after the firm stops practising, ensuring that claims arising from past work remain covered.
The duty to notify circumstances - reporting to the insurer any facts or circumstances that might give rise to a claim, even before a formal claim is made - is a critical obligation under claims-made PI policies. Failure to notify a known circumstance during the policy period can result in the insurer declining to cover the subsequent claim under the policy in force when the claim is eventually made, on the basis that the circumstance should have been notified under the earlier policy. Professional firms should have a structured process for identifying and notifying potential circumstances at renewal.
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Hiscox is the UK's largest PI underwriter by premium volume, with strong market positions across solicitors, accountants, architects, technology consultants, and management consultants. Its SRA-compliant solicitors PI wording and its direct-to-SME professional services PI product (available through brokers and directly online for lower-risk professions) are widely used. Hiscox is one of the qualifying insurers on the SRA's panel for solicitors PI.
Markel specialises in niche and professional liability lines and is active in PI for technology businesses, media companies, staffing agencies, and financial services intermediaries. Its policy wordings for technology E&O (errors and omissions, the US equivalent of PI) include cyber liability extensions that are relevant for tech firms whose PI exposure and cyber exposure overlap.
Travelers is a significant PI underwriter in the UK market for construction professionals (architects, engineers, project managers), management consultants, and financial services intermediaries. Its construction professional indemnity products are designed for firms working on projects where the Building Safety Act 2022 creates enhanced professional liability exposure.
| Profession | Regulator | Minimum PI required | Run-off requirement |
|---|---|---|---|
| Solicitors | SRA | £2m-£3m per claim | Yes (SRA minimum terms) |
| Chartered surveyors | RICS | £250k-£1m per claim | Yes (RICS rules) |
| Financial advisers (IFA) | FCA | FCA IPRU minimum | Yes (FCA rules) |
| Architects | ARB / RIBA | Project-value based | Yes (RIBA guidance) |
| Accountants | ICAEW / ACCA | Practising certificate condition | Yes |
Setting the Right PI Limit for Non-Regulated Professions
For professions not subject to a regulatory minimum, setting an appropriate PI limit requires analysis of three factors: the maximum financial loss a client could suffer from the firm's negligence; the contractual PI requirements in the firm's client agreements; and the financial resilience of the firm to absorb uninsured losses above the policy limit.
Client agreements and public sector procurement frameworks frequently specify minimum PI limits - commonly £1 million, £2 million, or £5 million per claim for larger contracts. Management consultants, IT service providers, and marketing agencies working for FTSE 250 or public sector clients will routinely encounter £2 million or £5 million minimum PI requirements as a condition of contract. Purchasing a lower limit to save premium and then being unable to satisfy a contractual requirement eliminates the commercial benefit of the cost saving.
The "any one claim" versus "aggregate" limit distinction is material for firms working on multiple simultaneous engagements. An "any one claim" limit of £1 million means each individual claim is covered up to £1 million, regardless of how many claims arise in the year. An "aggregate" limit of £1 million means all claims in the year share a single £1 million limit, which can be exhausted by a single large claim or multiple smaller ones. Most PI policies for professional services firms are structured on an "any one claim" basis, but this should be confirmed in the policy wording.
Key Exclusions in UK PI Policies
Several standard exclusions appear in most UK PI policies and represent material coverage limitations that professional services firms should understand before relying on their cover.
Contractual liability exclusions restrict cover to the professional's legal liability that would exist regardless of contract - pure contractual obligations assumed by the professional (such as guarantees of a specific outcome or indemnities in favour of the client that exceed the professional's common law duties) are typically excluded. Professional services firms that include broad indemnity clauses in their client agreements may find those contractual obligations are not covered under their PI policy.
Known circumstances exclusions exclude claims arising from facts or circumstances that the insured knew about before the policy inception. This reinforces the importance of notifying potential circumstances under the prior policy rather than carrying them forward unreported into a new policy year.
Cyber and data exclusions are increasingly common in PI policies as insurers seek to push cyber-related claims onto standalone cyber policies. For technology professionals, management consultants, and data processors whose PI and cyber exposures overlap significantly, ensuring that the two policies are complementary (not creating a gap between PI and cyber exclusions) requires careful review by a specialist broker.
FAQ
Is professional indemnity insurance compulsory for all UK businesses?
No. PI is compulsory only for specific regulated professions - solicitors (SRA), chartered surveyors (RICS), financial advisers (FCA), accountants (ICAEW/ACCA), architects (ARB), and several others. For unregulated professions, PI is not legally required but is frequently required by client contracts, public sector procurement frameworks, and professional body membership rules. Any business providing advice or services where negligence could cause a client financial loss should evaluate PI as a core risk management purchase.
What is a retroactive date and why does it matter?
The retroactive date is the earliest date from which the policy will cover claims arising. A policy with a retroactive date of 1 January 2023 will not cover claims arising from work performed before that date. When switching insurers, obtaining a retroactive date that matches or predates the firm's founding is important to ensure continuity of coverage for past work. Many insurers offer full prior acts coverage (no retroactive date limitation) for firms with a clean claims history.
How much PI insurance do freelance consultants need?
There is no universal answer for non-regulated freelancers. The starting point is the PI limit required by client contracts - typically £1 million for smaller corporate clients and £2 million or more for larger ones. The firm's actual liability exposure (the maximum financial loss a client could suffer from a negligent piece of advice) is also relevant. Most professional services firms with annual fees above £100,000 purchase at least £1 million per claim; those working for larger clients or on higher-stakes engagements typically purchase £2 million or more.
Does PI insurance cover claims by former clients after the business closes?
Only if run-off cover is purchased. When a professional services firm ceases trading, its PI policy expires. Without run-off cover, claims arising from past work after the policy expiry are uninsured. Run-off cover extends the reporting period for a defined period (typically six years) after the firm stops practising, ensuring claims can still be made against the policy. Run-off cover is a condition of RICS, SRA, and other regulated profession requirements when a practice closes.
Can PI insurance be placed without a broker?
Some insurers offer online PI quotes directly to small professional services firms for straightforward risks. However, most PI policies for regulated professions require broker placement to ensure regulatory minimum terms are met and appropriate retroactive dates are agreed. For regulated professions and for any firm with a complex risk profile, specialist PI broker advice is strongly recommended. The British Insurance Brokers' Association maintains a broker-find service at biba.org.uk for businesses seeking specialist professional lines brokers.
Frequently asked questions
Is professional indemnity insurance mandatory for UK businesses?
Mandatory by regulator rather than general law. The Solicitors Regulation Authority requires solicitors to hold minimum cover per claim. RICS-regulated surveyors must hold PII per the RICS-approved minimum wording. The FCA requires authorised financial advisers to hold PII calibrated to firm income. The Architects Registration Board mandates PII for architects. Outside these regulated professions, PII is contractually required by many clients but not legally mandatory. Each regulator publishes current minimum requirements.
How much professional indemnity cover should a UK consultancy carry?
Cover should reflect the largest single contract value and the cumulative risk from concurrent engagements. Most UK consulting contracts require 1 million to 5 million pounds cover. Public sector contracts often require 5 million to 10 million pounds. SRA, RICS, FCA, and ARB-regulated firms must hold minimums set by their regulator. For unregulated consultancies, brokers typically advise cover equal to one to three times annual fee income depending on advice complexity.
What does professional indemnity insurance not cover?
Standard PII excludes deliberate wrongful acts, regulatory fines, contractual liabilities the insured had no legal duty to accept, and claims arising from work performed before the retroactive date in the policy. Cyber-related claims are increasingly excluded from PII and require standalone cyber insurance. Asbestos, pollution, and bodily injury claims are excluded as they fall under public liability or specialist insurance. Always review the policy schedule rather than marketing summaries.
What is the difference between claims-made and occurrence-based PII?
Almost all UK professional indemnity policies are claims-made, meaning the policy responding to a claim is the one in force when the claim is notified, not when the work was done. This makes run-off cover (typically six to ten years after a practice closes) essential when ceasing trading. Occurrence-based policies are rare in PII. Run-off arrangements are required by the SRA for closing law firms and recommended by most other regulators.
How are professional indemnity premiums calculated for UK firms?
Premiums reflect fee income, work types, client mix, prior claims history, and any disciplinary findings. Higher-risk work (corporate, conveyancing, financial advice) attracts higher rates per 1,000 pounds of fee income than lower-risk work (HR consulting, training). Public sector and regulated sector exposure typically increases rates. Recent claims or notifications materially increase renewal costs. The Financial Ombudsman Service publishes complaint volume data that some insurers use as a proxy for sector risk.
How We Verified
This article draws on SRA minimum terms and conditions for PI insurance, RICS mandatory PI rules, FCA sourcebook requirements for financial advisers, ARB code of practice, and Insurance Act 2015. Insurer descriptions are based on publicly available product documentation as of May 2026. No insurer paid for inclusion in this article.
