Professional Indemnity Insurance for New Tax advisers — 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 tax adviser?

Let us start with the honest answer, because it is more useful than a sales pitch. Giving tax advice is not, in itself, a "reserved" or statutorily regulated activity in the UK. There is no single law that says a tax adviser must be qualified, licensed or insured before taking on a client. In principle, you can start advising tomorrow. So on a strict reading, professional indemnity insurance is not a legal requirement for most independent tax advisers.

That is where the "on paper" version ends and the "in practice" version begins — and in practice, you almost certainly need it.

First, the professional-body reality. Many tax advisers are members of the Chartered Institute of Taxation (CIOT) or the Association of Taxation Technicians (ATT). Membership of these bodies is voluntary — you can advise on tax without belonging to either — but if you do join and hold yourself out under their designations, they set rules of conduct you agree to follow. Both bodies, together with the main accountancy institutes, adopt Professional Conduct in Relation to Taxation (PCRT), the standard that governs how members deal with clients and HMRC. Professional bodies that license members to practise typically expect adequate professional indemnity cover as a condition of holding that status. If you are a member, check your body's own requirements — but assume PI is expected of you, not optional.

Second, and this catches out almost every new adviser, the client-contract reality. Larger clients, accountancy practices you sub-contract for, introducers and referral partners will frequently ask, in writing, whether you hold PI and to what limit — often before they will sign an engagement letter. To them, "we are not insured" reads as "we cannot cover our mistakes," and the conversation ends. Your first big client may well be the reason you need the policy, not an abstract regulator.

Third, and most fundamentally, the risk itself. Tax is a field where a single wrong figure, a missed deadline, an election not filed, or advice that turns out to rest on a misread of the rules can leave a client with a bill — interest, penalties, or a lost relief — that they will look to you to make good. Even a complaint you are confident is wrong still has to be answered, and answering it properly means solicitors and time. PI exists to pay the defence costs and any settlement or award, so a single error does not put your home and savings on the line.

So: legally optional for most, professionally expected, commercially near-essential, and personally the thing that lets you sleep. For a new firm, that adds up to "yes, you need it."

2. When cover must start — from your first client, and why day one matters

The instinct of a lot of new advisers is to "get set up first, get insured once there's money coming in." With most insurance that logic is harmless. With professional indemnity it is a genuine trap, and it is worth understanding exactly why.

The moment you give a client advice they rely on, you have created a potential liability. If that advice is later said to be wrong, the claim can arrive months or even years afterwards — long after the work felt finished. PI needs to be live from the first piece of chargeable work you do, because it is the presence of a policy at the right time that determines whether you are protected at all.

The practical rule for a first-timer is simple: arrange your PI so it is in force on or before the day you take on your first engagement, and then never let it lapse. The cost of cover in your quiet early months is small; the cost of a gap in cover is potentially everything. We explain the mechanics of this in the "claims-made" section below, because it is the single most important concept to grasp before you buy.

3. How much cover does a new firm need?

The amount of cover is called your limit of indemnity — the maximum the insurer will pay out. Choosing it is the decision new advisers agonise over most, usually because it feels like guesswork. It does not have to be.

Common limits are offered in round tiers — for example £1 million, £2 million or £5 million. These are illustrative options rather than a recommendation; the right figure for you depends on your own circumstances. Three things tend to drive it:

• The size of the numbers you touch. A £1m limit means one thing if your clients are sole traders and contractors, and quite another if you advise on a corporate reorganisation or a large capital gains position where a single error could crystallise a six-figure liability. The potential loss is tied to the tax at stake, not to your fee.
• What your clients and partners require. This is the one first-timers overlook. If you sub-contract for an accountancy practice or take referrals from an introducer, they may contractually require a minimum limit — commonly £1m or £2m. Some larger clients set their own. A client-mandated limit can override your own estimate, so it is worth asking before you commit.
• Your appetite for exposure above the limit. PI is not compulsory for most tax advisers, so there is no statutory minimum to anchor to. That freedom cuts both ways: you choose, and anything above your limit is your own money. Most advisers would rather carry a slightly higher limit than discover, mid-claim, that they under-bought.

One detail to check on any quote: whether defence costs are paid in addition to the limit or come out of it. If legal costs erode your limit, a £1m policy provides less than £1m for a settlement once the lawyers are paid. It is a question worth asking, and one we will always answer plainly.

If you are genuinely unsure, tell us what you advise on and who your clients are and we will talk it through — start a quote and we can size it together.

4. What shapes the cost — what underwriters look at for a brand-new firm

We will not quote a price in a guide, because an honest figure depends entirely on your specifics and any number here would be made up. What is genuinely useful is understanding what an underwriter is weighing up when they price a new tax firm with no track record — because it demystifies the process and helps you present yourself well.

For an established firm, insurers lean heavily on claims history. As a new firm you do not have one — and that is not the disadvantage it sounds. It simply means the underwriter looks at other things:

• Your estimated turnover / fee income. A realistic first-year estimate is the main measure of the volume of work you will do. Estimate honestly — over-stating inflates your premium, and materially under-stating can affect a claim.
• What you actually do. Routine compliance work — personal and corporate tax returns, straightforward VAT — sits at one end. Complex or higher-risk activity — bespoke tax planning, R&D claims, schemes, advice on large or contentious matters — sits at the other. The clearer and more specific you are, the better.
• Your qualifications and experience. CIOT or ATT membership, an accountancy qualification, or years spent doing this work inside a firm before going independent all tell the underwriter you know your trade. New firm is not the same as new to the work, and it counts in your favour.
• Your client base and how you work. The types of client, whether you use engagement letters, and your general approach to documentation all feed the picture.
• The limit and excess you choose. A higher limit costs more; accepting a higher excess (the first slice of any claim you cover yourself) can bring the premium down.

The reassuring part: because you are new, there is far less to assemble than you might fear. No years of accounts, no claims record to explain. A clear description of your work and an honest turnover estimate carry most of the weight.

5. "Claims-made" explained simply — and why continuity from the start matters

This is the one concept that, if you understand nothing else, will save you from the worst mistake in professional indemnity. Please read it twice.

PI is almost always written on a claims-made basis. That means the policy that responds to a complaint is the one in force on the day the claim is made against you — not the policy you held when you did the work.

Picture it. You advise a client in 2026. The advice is questioned in 2029. It is your 2029 policy that has to deal with it — even though the work was three years old. If you had let your cover lapse in the meantime, there is no policy live to respond, and the fact that you were insured back in 2026 does not help you.

Two consequences follow, and both matter from day one:

• Never let cover lapse while you are still exposed to past advice. You need continuous PI not just while you are working, but for as long as a client could still bring a claim about work you have already done. Renew on time, every year, without a gap.
• Your "retroactive date" is set when you first buy. This is the date from which past work is covered. Buy your first policy before your first engagement and your retroactive date can sit right at the start of your career, so your whole history of advice stays protected as you renew. Leave a gap between starting work and buying cover, and that early work may fall outside the policy forever.

There is a matching point for the far end of your career: when you eventually stop practising, you may need run-off cover to stay protected against claims about old work after you have closed the firm. That is a long way off for a new adviser — but it is the same principle, and it is why continuity from your very first policy is worth getting right now.

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

The good news for a first-timer: buying is far simpler than the jargon suggests, and a new firm has less to provide than an established one. Here is what to have ready.

• Who you are. Your name and business structure — sole practitioner, partnership or limited company — and your trading name.
• An estimated turnover. Your best honest projection of fee income for the first year. An estimate is expected; nobody has real figures on day one.
• What you do. A short, specific description of the tax services you offer and the kind of clients you act for. Specific beats vague every time.
• Your background. Qualifications, professional-body membership (CIOT, ATT or an accountancy body), and relevant experience — including work done before going independent.
• The limit you want. If a client or partner has specified a minimum, note it. Otherwise we can help you choose.
• Anything you already know about. If you are aware of any circumstance that could give rise to a claim, you must disclose it. For a genuine new start there is usually nothing — but honesty here is what keeps your policy valid.

That is essentially it. Answer accurately and completely — a professional indemnity policy relies on fair presentation of the facts, and getting it right at the outset is what makes sure the cover pays when you need it.

When you have those to hand, you can begin your quote online and we will take it from there.

7. Common first-timer mistakes to avoid

• Waiting until you are "properly up and running." Cover should be live before your first engagement, not after your first invoice. The gap between the two is exactly when a claims-made policy leaves you exposed.
• Buying on price alone. The cheapest premium can hide a low limit, a high excess, defence costs that eat into the limit, or narrow wording that excludes work you actually do. Compare what is covered, not just the figure.
• Under-stating turnover to save a little. It feels harmless and it is not. A materially wrong estimate can undermine the policy at the very moment you rely on it.
• Describing your work too narrowly. If you insure "tax compliance" but also do planning work, a claim on the planning side may fall outside cover. Tell your broker everything you do.
• Letting the policy lapse at renewal. Even a short gap can break the continuity that protects your earlier advice. Diarise the renewal date and treat it as non-negotiable.
• Not telling your insurer about a possible problem. If a client is unhappy or a mistake surfaces, notify promptly — even if no formal claim has been made. Sitting on it can prejudice your cover.
• Ignoring what partners require. Losing a referral relationship because you had no PI, or the wrong limit, is an avoidable and expensive miss.

8. About Apex — and why we can quote this quickly

Apex Insurance Brokers Limited is an FCA-authorised insurance broker based in Bristol (FRN 724952). We arrange professional indemnity cover for independent professionals — including tax advisers setting up on their own for the first time — and we spend a good deal of our time doing exactly the thing this guide is about: explaining the mechanics plainly and getting the right cover in place without fuss.

Because a new firm's proposal is straightforward, we can usually turn a quote around fast. You give us an honest picture of what you do; we handle the market, the wording and the jargon, and come back with cover that fits — at a limit that matches both your risk and anything your clients require. If you are unsure about limits, excess or what counts as a "circumstance to disclose," that is precisely the sort of question a broker is for. Ask us.

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.