Professional Indemnity Insurance for New Engineers — Your First Policy (2026)

Reviewed by Matthew Bartlett, Director, Apex Insurance Brokers Limited · Last reviewed 2026-08-05

1. Do you actually need PI as a new engineer?

This is the first honest question every new practice asks, so let's answer it plainly. In the UK there is generally no statute that says "an engineer must hold professional indemnity insurance" in the way that, say, solicitors or accountants face mandatory scheme rules. So on a purely legal reading, you can often trade without it.

But that reading misses how engineering work is actually bought and sold. In practice, the need comes from two directions.

Your professional standing. The Engineering Council maintains the UK register for Chartered Engineers (CEng), Incorporated Engineers (IEng) and Engineering Technicians (EngTech), and it sets the standards that professional institutions uphold. The major institutions — the Institution of Civil Engineers (ICE), the Institution of Structural Engineers (IStructE) and the Institution of Mechanical Engineers (IMechE) among them — publish codes of conduct that expect members offering services independently to hold adequate professional indemnity cover. If you practise in your own name or through your own firm, that expectation typically applies to you. It's part of behaving as a competent professional: you carry the means to put things right if something goes wrong.

Your client contracts. This is the one that catches most first-timers off guard. The moment you tender for real work — a consultancy appointment, a design package, a role on a project under a standard form of contract — the appointment will very often name a minimum level of PI you must hold, and require you to maintain it. Main contractors, developers, local authorities and larger clients frequently make it a condition of even being considered. You cannot sign the appointment, or you sign it and are immediately in breach. Many an engineer has won the work and then discovered they needed a policy in place before they could put pen to paper.

There's also the plain commercial logic. Engineering carries real exposure: a design that doesn't perform, a specification error, a calculation that's out by a margin that only shows up on site or years later. If a client alleges your professional work caused them financial loss, defending that allegation — even a weak one — costs money. PI is what stands between a single disputed job and your personal or business finances. For most new engineering practices, the answer to "do I need it?" is a practical yes, well before it's ever a legal one.

2. When cover must start — and why day one matters

The instinct of a lot of new firms is to wait: get a few jobs under your belt, see if the business flies, then sort out insurance. With professional indemnity, that instinct is the wrong way round, and it's worth understanding exactly why.

Your PI cover should be live from your first client engagement — arguably from the moment you first give professional advice that someone relies on. Two reasons.

First, the contractual one we've just met: if your first client's appointment requires PI, you need the policy before you sign, not after. Starting the policy late doesn't retro-fit compliance.

Second, and more importantly, PI works on a "claims-made" basis (more on this in section 5). In short, the policy that responds to a claim is the one in force when the claim is made against you — not the one that was in force when you did the work. If you did a piece of design in month one with no policy, and a problem surfaces in month eight, having bought cover in month six doesn't automatically help you: the earlier work may fall outside what the policy will look back on. Buying from day one, and then keeping cover continuous, is what protects the whole arc of your working history.

The reassuring part: starting a policy as a brand-new firm is straightforward, and because you have no back-catalogue of past work to insure yet, your first year is usually the simplest you'll ever arrange. Get cover in place before your first job →

3. How much cover does a new firm actually need?

The "limit of indemnity" is the maximum the insurer will pay out. It's usually expressed as a figure per claim, or in the aggregate across a policy year. Common options you'll see offered are £1m, £2m and £5m, though higher limits are available for larger or higher-risk work. So how do you land on the right number as a new engineer?

Three things tend to drive it:

What your clients require of you. This is often the deciding factor. If an appointment specifies you must carry, say, £2m of PI, then £2m becomes your floor regardless of what you'd otherwise have chosen. It's common to size your limit around the most demanding client you realistically want to work for. If you're eyeing public-sector or main-contractor work, expect the required figures to be firmer and sometimes higher.

The nature and consequence of your work. A structural or civil design where an error could have significant physical and financial consequences carries a different risk profile from lower-stakes advisory work. The bigger the potential loss if something goes wrong, the more limit you'll want behind you.

The value of the projects you touch. Your fee on a job is rarely the measure of your exposure — the loss can be many multiples of what you were paid. A modest fee on a project of significant value can still generate a substantial claim, so match your limit to the scale of the works you advise on, not just your invoice.

A sensible way for a new firm to think about it: identify the highest contractual PI requirement among the clients you want, consider the worst realistic loss your work could contribute to, and choose the higher of the two. If you're not sure, that's exactly the conversation a broker is for — we help you avoid buying too little to be taken seriously, or paying for far more than your work warrants.

4. What shapes the cost of a first policy

We won't quote prices here — every firm is different and any figure in a guide would be misleading. But it helps to know what an underwriter is actually weighing up when they look at a new engineering practice with no trading history. Understanding this makes the process feel far less opaque.

For a new firm, an insurer generally looks at:

• Your estimated turnover / fee income. Since you have no past figures, you'll give a reasonable forward estimate for your first year. This is one of the biggest factors, because it's a proxy for how much work — and therefore exposure — you'll take on.
• Your discipline and the type of work. Structural, civil, mechanical, geotechnical, building services and so on each carry different risk characteristics. What you actually do day to day matters more than the label.
• Your qualifications and experience. Chartered status, the years you've worked in the field before going independent, and your track record all reassure an underwriter — a new firm run by an experienced, qualified engineer is a very different proposition from a true novice.
• The limit of indemnity you choose. A higher limit means more cover, which is reflected in the premium.
• The nature of your clients and projects. Domestic-scale work, commercial, infrastructure, and any involvement with higher-hazard or higher-value projects all feed into the assessment.

Notice what's not on that list for a first-timer: a claims history. You don't have one, and that's fine — insurers price new firms all the time. The honest, well-explained estimate you give of your turnover and activities does most of the work. The clearer and more accurate you are, the better the terms tend to be.

5. "Claims-made" — explained simply

This is the single most important thing to understand about PI, and it trips up almost every first-time buyer, so here it is in plain terms.

Most everyday insurance is "claims-occurring": the policy in force when the event happens is the one that pays. PI is different. It's claims-made, which means the policy that responds is the one in force on the day a claim is made against you — regardless of when you actually did the work that's being complained about.

Two consequences flow from this, and both point the same way:

You must have a live policy when the claim lands. If you did excellent work three years ago but let your cover lapse last month, and a claim arrives today, there may be no policy to turn to. The good work being in the past doesn't help — only current cover responds.

Continuity from the start is everything. Because engineering problems can surface long after the work is finished, you need an unbroken chain of cover running from your first job onwards. When you renew each year, your policy typically carries a "retroactive date" — the point back to which past work is covered. Buy from day one and keep renewing without a gap, and that date stays anchored at the beginning, protecting your whole history. Let cover lapse and restart later, and you can lose that protection for everything you did before.

The takeaway for a new firm: this isn't a product you dip in and out of. You start it early and you keep it running — including, one day, after you stop practising, via "run-off" cover that keeps you protected against claims that arrive after you've closed the doors. For now, all you need to hold onto is: buy early, never let it lapse.

6. How to buy your first policy — and what you'll need

Here's the reassuring reality: arranging your first PI policy is one of the lighter administrative jobs of setting up an engineering practice. You'll be asked for less than an established firm, because there's simply less history to describe.

Typically you'll need to tell the insurer:

• Who you are and how you trade — sole practitioner, partnership or limited company.
• Your engineering discipline and a description of the services you offer.
• Your qualifications and relevant experience, and those of anyone working with you.
• An estimate of your first-year turnover or fee income.
• The kind of clients and projects you expect to work on.
• The limit of indemnity you want (or that your clients require).

One duty worth naming: when you take out any insurance, you have a legal obligation to answer the insurer's questions honestly and to take reasonable care not to give misleading information. Get an estimate wrong innocently and that's usually fine — but don't guess wildly or leave out something material. If in doubt, say so; a broker will help you frame it correctly.

That's genuinely most of it. Working through a broker means you describe your practice once and we translate it into the questions insurers ask, compare terms across the market, and make sure the wording actually fits how engineers work rather than a generic template. Begin your engineer's PI quote →

7. Common first-timer mistakes to avoid

A handful of avoidable errors account for most of the trouble new engineering firms run into. Forewarned:

• Waiting until you've "made it". Cover bought late leaves your earliest work exposed. Start from your first engagement.
• Buying the lowest limit without checking client requirements. If your appointment demands £2m and you hold £1m, you're in breach the day you sign. Read the PI clause before you commit.
• Letting cover lapse between jobs. A quiet spell is not the time to cancel. A claim can arrive months or years after the work, and only a live policy responds.
• Under-estimating turnover to shave the premium. An inaccurate figure can undermine the policy when you most need it. Estimate honestly.
• Assuming your limited company protects you personally. Company structure and professional indemnity do different jobs; incorporating is not a substitute for PI.
• Not reading what's excluded. Understand the scope of your wording — what's covered, the excess you'd pay on a claim, and any activities left out — before you rely on it.

8. About Apex — and how quickly we can help

Apex Insurance Brokers Limited is an FCA-authorised insurance broker based in Bristol (FRN 724952). We arrange professional indemnity cover for engineers and engineering practices across the UK, from sole practitioners taking their first appointment to growing consultancies.

Because we work across the market rather than for a single insurer, we can match your discipline, your project types and your clients' contractual requirements to a policy that fits — and explain the wording in plain English so you know what you're buying. For a new firm with a clear picture of its work, we can often turn a quote around quickly, so a missing certificate never stands between you and your first contract.

Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority (FRN 724952). This guide is general information, not advice on a specific policy.