Reviewed by Matthew Bartlett, Director · Last reviewed 8 July 2026
Engineering professional indemnity in the UK is priced by an underwriter reading a submission that reflects the practice's discipline mix, project types, contract exposure, and claims history. There is no fixed tariff. Structural engineers, civil engineers, mechanical and electrical engineers, geotechnical engineers, and multi-disciplinary consultancies all rate differently, and the introduction of the Building Safety Act 2022 has changed the shape of the market for anyone with residential higher-risk building exposure. This page sets out what actually drives the number for engineering consultancies and how Apex Insurance Brokers approaches an engineers' PI submission.
Fee income is the anchor. Underwriters rate on gross professional fee income, and the rate itself moves sharply with discipline. Structural engineering carries a higher rating factor than most other engineering disciplines because the loss potential on structural failure is significant. Civil engineering with heavy infrastructure exposure, geotechnical work with ground-condition risk, and any work on higher-risk residential buildings sit at the higher end of the rating scale. M&E engineering, building services engineering, and lower-risk consultancy sit lower.
Contract exposure is central. Collateral warranties given to funders, purchasers, and tenants extend the practice's exposure well beyond the original client relationship, and their number and form are read carefully. Design-and-build appointments, novation from an original consultant appointment to a contractor, and net contribution clauses in the appointment all feature. The presence of aggregation clauses, particularly on standard-form appointments used across a large development, is material to the wording that underwriters offer.
Claims and circumstances history is read on substance. A single closed-nil circumstance from six years ago is priced differently to an open matter with a reserve. The number and seniority of Chartered Engineers (CEng) on the team, discipline registrations with ICE, IStructE, IMechE, or IET, quality management systems, and design-review procedures all factor in.
The engineering profession in the UK is regulated by the Engineering Council through the four category memberships (CEng, IEng, EngTech, ICTTech). Registration is via a licensed professional engineering institution: the Institution of Civil Engineers (ICE), the Institution of Structural Engineers (IStructE), the Institution of Mechanical Engineers (IMechE), the Institution of Engineering and Technology (IET), and others. Unlike solicitors or surveyors, there is no statutory PI floor for the general engineering profession. PII is required by client contract, by professional institution rules, and by good practice, but no specific minimum limit is set by a statutory regulator.
ICE and IStructE each set expectations for PII within their codes of conduct and their guidance for practising members. Consultancies registered with the Association for Consultancy and Engineering (ACE) sign up to the ACE standard commitments, which include appropriate PII. Contract requirements typically drive the limit: NEC and JCT appointments will specify limits, and framework appointments from public bodies or large developers will normally set out a minimum PI limit and other insurance requirements.
The Building Safety Act 2022, in particular section 135, has extended the limitation period under the Defective Premises Act for dwellings and has changed how insurers view engineers' exposure to historic residential design work. Consultancies with material exposure to higher-risk buildings will see this feature in the underwriter's questions and the rating.
Apex Insurance Brokers is authorised and regulated by the Financial Conduct Authority (firm reference number 724952) and places engineers' PI with insurers that have appetite for structural, civil, geotechnical, M&E, and multi-disciplinary practices. We are a named-broker practice: Matt Bartlett or a named colleague reads every submission personally, drafts the presentation to reflect the discipline mix and the collateral warranty position, and negotiates on the practice's behalf.
Our client retention rate across the book is approximately 95%. We work with sole practitioners, small studios, and multi-disciplinary consultancies. Our approach is to engage with the practice on its actual project pipeline, its collateral warranty exposure, and any BSA-adjacent work early, so that the presentation reflects the current risk profile.
Any range published on a web page is a starting point for conversation, not a quote. With that on the record: a small M&E or lower-risk consultancy at modest fee income and clean claims will typically see primary PI premiums in the low thousands of pounds a year. Structural and civil practices with material residential or higher-risk building exposure should expect terms to reflect that materially.
Mid-sized practices with a mixed book often pay a rate on fee income in the low to mid single digits of a percent, but the number moves sharply with discipline, collateral warranty count, residential exposure, and limit purchased. Practices with clean records and a lower-risk discipline mix should expect the market to compete for them. The specific figure comes out of the underwriter's assessment of the submission, not from a table.
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