How much is professional indemnity insurance for planning consultants?
Reviewed by Matthew Bartlett, Director, Apex Insurance Brokers Limited · Last reviewed 2026-08-05
In short: There is no single price. The premium for a planning consultant's professional indemnity (PI) insurance is built from your fee income, the type of work you do, the limit of indemnity you choose (commonly £1m, £2m or £5m), your claims history and how insurers view your sector risk. Two similar-sized practices can pay very different amounts.
If you advise on planning applications, appeals, land promotion, environmental or heritage matters, or act as an expert witness, your advice carries financial consequences for clients. Professional indemnity insurance protects you if a client alleges your advice or work caused them a loss. The question “how much will it cost?” is best answered by understanding the levers that move the number, rather than a headline figure that rarely fits your practice.
What drives the premium
Underwriters price PI cover on the likelihood and potential size of a claim against you. For a planning consultancy, the main drivers are:
| Driver | Why it moves the price |
|---|---|
| Fee income / turnover | The primary rating factor. Higher fee income generally means more clients, more advice and greater exposure, so premiums scale broadly with it. |
| Nature of activities | Straightforward household or minor applications are viewed differently from major schemes, land promotion, EIA work, viability appraisals or expert witness testimony. |
| Limit of indemnity | A higher limit (e.g. £5m rather than £1m) costs more, but the increase is not linear. |
| Claims & circumstances history | Prior claims or notified circumstances raise the perceived risk. A clean record over several years helps. |
| Experience & controls | Qualifications (e.g. RTPI membership), years trading, contract terms, and how you document advice all inform the underwriter's view. |
Fee income is the starting point
Most insurers rate planning consultancy PI against your annual fee income, sometimes split by activity. A sole practitioner handling local applications sits at one end of the scale; a multi-person practice advising on large residential or commercial schemes sits at the other. When you provide figures, insurers usually want your last full year and an estimate for the year ahead, and they may ask for a breakdown by work type so higher-exposure activities are priced fairly rather than everything being lumped at the highest rate.
The work you do matters as much as its volume
Planning is a broad discipline, and underwriters do not treat all of it the same. Advice tied to a scheme's economic outcome tends to attract closer scrutiny because an alleged error can translate into a large, quantifiable loss. Typical higher-attention activities include:
- Development viability and financial appraisals
- Land promotion and option/promotion agreement advice
- Major or strategic-scale applications and appeals
- Environmental impact assessment and specialist consenting
- Expert witness work and evidence at inquiries
If your practice does little or none of the above, say so clearly on your proposal — it helps the underwriter price your actual risk rather than a worst-case assumption.
Choosing a limit of indemnity
The limit is the most you can claim under the policy. Common generic options are £1m, £2m and £5m, though the right figure depends on the value of the projects you advise on and any contractual requirements.
- £1m — often a baseline for smaller practices on lower-value work.
- £2m — a frequent middle option as project values and client expectations rise.
- £5m — used where clients, lenders or public-sector frameworks demand it, or where a single instruction could generate a large loss.
Two points are worth knowing. First, doubling the limit does not double the premium — higher limits cost proportionally less. Second, check whether your cover is on an “each and every claim” or “aggregate” basis, because that affects how much protection you really have across multiple claims in a year. A client contract or a public framework may also stipulate a minimum limit, so it is worth confirming before you commit.
Want a figure built around your actual fee income and activities, not a generic quote?
Get a PI quote →Claims history and sector conditions
Your own record is a major factor. Past claims or circumstances you have had to notify will be reflected in your terms, while a sustained clean history works in your favour. Beyond your practice, the wider market moves too: insurers periodically reassess how they view planning and property-related risk, and appetite and pricing across the sector can shift from one year to the next regardless of anything you have done. This is why premiums can change at renewal even when your business has not.
Retroactive cover and continuity
PI is written on a “claims made” basis, meaning the policy in force when a claim is made responds — not the one in force when you did the work. The retroactive date determines how far back your past work is covered. Maintaining continuous cover and preserving your retroactive date protects you against claims arising from advice given years ago, which is important in planning where disputes can surface long after an application concludes. Letting cover lapse, or accepting a later retroactive date, can quietly leave old work exposed.
How a broker helps you get the right price
A specialist broker's job is not simply to find a low number, but to present your practice accurately so insurers price the real risk and to make sure the wording actually covers how you work. In practice that means:
- Framing your fee income and activity split so higher-exposure work is not over-rated by default.
- Matching you to insurers with genuine appetite for planning consultancy.
- Checking the limit, aggregation basis and retroactive date suit your projects and contracts.
- Reviewing exclusions so activities such as expert witness or viability work are not inadvertently carved out.
- Supporting you at renewal and if you ever need to notify a circumstance or claim.
You can start the process with our online proposal form and we will build terms around your specific practice.
Common questions
Is PI insurance a legal requirement for planning consultants?
There is no general statutory duty for an independent planning consultant to hold PI, but clients, public-sector frameworks and professional bodies frequently require it, and it is standard practice for anyone giving professional advice for a fee.
What limit of indemnity should I choose?
It depends on the value of the projects you advise on and any minimums set out in your client contracts or frameworks. £1m, £2m and £5m are common options; a broker can help you weigh exposure against cost.
Why might my premium change even though my business hasn't?
PI pricing reflects both your practice and the wider market. If insurers reassess planning or property-related risk, terms across the sector can move at renewal independently of your own record.
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 or a substitute for your policy wording.