Professional indemnity insurance for engineers.
Engineers' Professional Indemnity Insurance
Engineering is one of the hardest professions to insure well, and one of the most poorly served by generic online cover. A consulting engineer's exposure does not sit in the words of a standard policy wording written for accountants or IT firms. It sits in collateral warranties signed years ago, in the design responsibility a firm quietly absorbed on a design-and-construct project, and in the CDM designer duties that attach to almost every drawing you issue. This guide sets out what engineers' professional indemnity (PI) insurance actually needs to do, and how to place it so it holds up when a claim arrives.
Apex is a specialist professional indemnity broker. We place cover for consulting, civil, structural and mechanical & electrical (M&E) engineers, for CDM designers, and for firms taking on design-and-construct liability. We work on a named-broker model: a director-level broker owns your account, handles placement and renewal, and acts as your advocate if a claim is notified. That matters more in engineering than in almost any other profession, because engineering claims are technical, long-tailed and frequently disputed. Engineering consultancies approaching renewal can also read about our professional indemnity broking work for engineers.
Why engineers need cover built for the discipline
Professional indemnity responds to claims alleging that your professional advice, design or services caused a third party financial loss. For an engineer, the trigger is rarely a simple mistake. It is a differential settlement that shows up eight years after practical completion, a services clash discovered on site, or an allegation that a design assumption did not account for a load case. Because the loss can emerge long after the work was done, PI is written on a claims-made basis: the policy that responds is the one in force when the claim is made against you, not the one in force when you did the work. That single feature drives almost every important decision about your cover.
It means you must keep continuous cover, including run-off when a firm closes or a partner retires. It means your limit and your policy wording need to keep pace with the largest projects on your books, not the average one. And it means that gaps, exclusions and aggregation clauses buried in a cheap wording can leave you exposed for work you completed years earlier.
Consulting, civil, structural and M&E: different risks, one policy
Insurers price and underwrite engineering disciplines differently, and a broker who treats them as interchangeable will overpay for some and under-protect others.
- Civil and structural engineers carry the highest-severity exposure. Foundation, retaining-wall and structural-frame failures are expensive to remediate and attract the longest limitation periods. Underwriters scrutinise project values, involvement in high-rise and basement works, and any temporary-works design.
- M&E and building-services engineers face frequency risk from services coordination, fire-stopping, ventilation and increasingly from thermal-performance and energy claims. Cladding and fire-safety questions have made this a heavily interrogated area at renewal.
- Consulting and multidisciplinary practices need wordings that follow the full scope of what they sign up to, including project management, expert witness work and any sub-consultant arrangements.
Access to the right markets is the differentiator. Apex places engineers' PI across 30+ qualifying and professional-lines insurer markets, which lets us match your discipline and risk profile to underwriters who genuinely want it, rather than defaulting to whoever quotes fastest.
CDM designer duties and your PI cover
Under the Construction (Design and Management) Regulations 2015, any engineer who prepares or modifies a design is a designer, with duties to eliminate, reduce and control foreseeable health and safety risks. Many practices also act as principal designer. These are legal duties, and a failure to discharge them can found a claim. Your PI wording should respond to liabilities arising from your CDM designer and principal-designer roles without carving them out or treating them as a separate, uninsured activity. We check exactly this when we review a wording, because it is a common and dangerous gap.
Collateral warranties and net-contribution
Collateral warranties are where engineers accidentally expand their liability. A warranty creates a direct contractual duty to a funder, purchaser or tenant who was not party to your original appointment, and a poorly drafted one can widen your obligations well beyond your appointment terms, extend limitation, or import fitness-for-purpose language that your PI insurer will not stand behind. PI policies respond to liability for negligence; they generally do not respond to liabilities you assumed voluntarily that go beyond a reasonable-skill-and-care standard.
The single most valuable clause an engineer can insist on is a net-contribution clause. Under the default joint-and-several liability position, a claimant can pursue you for the whole of a loss even where other consultants and the contractor share the blame, then leave you to chase them for their share. A net-contribution clause limits your liability to your fair share of the loss. We review appointments and warranties with you so that the wording you sign is one your policy will actually back.
Design-and-construct liability
When an engineer works for a design-and-construct contractor, the risk profile changes. The contractor is often held to a fitness-for-purpose obligation, and there is a real danger that this standard flows down to the engineer through the sub-contract, even though PI insurance is built around reasonable skill and care. The result can be an uninsured gap precisely where the exposure is greatest. Contractors and consultants engaged in this space need appointment terms, warranties and policy wording that are read together, not in isolation. Our guide for design-and-construct contractors in Bristol covers this overlap in more detail.
Getting your limit and excess right
Two figures do most of the work in an engineer's policy: the limit of indemnity and whether it is written on an each-and-every-claim or aggregate basis. Public and framework contracts frequently specify a required limit, and some warranties demand you maintain a stated level for a set number of years after completion. An aggregate limit that is adequate for one claim can be exhausted if several notifications land in the same policy year. We size the limit around your largest current and recent contracts, your warranty obligations, and the way claims aggregate in your discipline, then structure the excess so it is manageable but not so high that the cover becomes theoretical.
How Apex places engineers' cover
We are a directly FCA-authorised broker, not an appointed representative, so we hold our own permissions and answer for our own advice. Your named broker reviews your appointments and warranties, presents your firm properly to underwriters who understand engineering, and stays with the account through claims and renewal. It is an approach that helps explain our roughly 95% client retention. We already publish placement guidance for difficult risks and specialist wordings, and we bring the same rigour to engineering. If you want a local starting point, see our pages for engineers in Plymouth, Yeovil and Newport, or explore the wider range of professions we cover on our sectors page.
Frequently asked questions
Does my PI policy cover my CDM designer and principal designer duties?
It should, but it is not automatic. Some wordings exclude or narrow liabilities arising from statutory CDM roles. We check that your policy responds to your designer and principal-designer duties as part of your ordinary professional activities before you rely on it.
What is a net-contribution clause and why does it matter?
It limits your liability to your fair share of a loss, rather than leaving you exposed to the whole of it under joint-and-several liability. For engineers who work alongside other consultants and contractors, it is one of the most important protections to secure in appointments and collateral warranties.
Will my policy cover fitness-for-purpose obligations on design-and-construct work?
Generally no. PI responds to failures of reasonable skill and care, not to absolute fitness-for-purpose promises. That is why the appointment and warranty wording matters so much on design-and-construct projects. We review the terms so you are not signing up to obligations your insurer will not back.
How much cover do I need?
It depends on your discipline, your largest projects, and the limits required by your contracts and warranties. We size the limit and choose an each-and-every-claim or aggregate basis around your real exposure rather than an off-the-shelf figure.
Do I still need cover after I finish a project or close the firm?
Yes. Because PI is claims-made, a claim about past work is met by the policy in force when it is made, not when the work was done. That means maintaining continuous cover, and arranging run-off when a firm closes or a principal retires, often for several years.
Do you only cover engineers in the South West and South Wales?
Our office is in Bristol and we have deep roots across the South West and South Wales, but engineering is a national specialism for us. We are happy to talk to consulting, civil, structural and M&E firms wherever they are based.
What might your PI premium look like?
A guideline range built from the premiums insurers have actually quoted on risks we handle. Pick your profession and enter a few details — it updates instantly.
Choose your profession and enter your fee income to see a guideline range.
How these figures are produced
This guide is built from Apex's own market data: the premiums insurers have actually quoted and charged on professional indemnity risks we have handled. Each night that data is aggregated into anonymised rate bands by profession, fee income and limit of indemnity. No client information is published — a band only appears where it contains at least five separate records, and unusually high premiums are excluded so a single atypical risk cannot distort the guide.
The range shown spans the typical spread of recent market outcomes for similar risks. Individual quotes can fall outside it in either direction. Figures exclude insurance premium tax at 12%.
This calculator is not a quote and is not an offer of insurance or advice. Your actual premium depends on full underwriting of your business, including your activities, claims record and insurer appetite at the time.
Get a quote / Speak to a broker
Tell us about your firm, your disciplines and the projects on your books, and a director-level broker will build cover around your real exposure. Start with a quote request, ask us to review a bundled or commercial quote form, or contact the team to talk it through before you renew.