How much is professional indemnity insurance for quantity surveyors?
Reviewed by Apex Insurance Brokers · Last reviewed 2026-08-05
Professional indemnity (PI) insurance protects a quantity surveyor against claims that your professional advice, cost estimates, valuations or contract administration caused a client a financial loss. Because quantity surveying decisions can move six- and seven-figure budgets, PI is a core cover for the profession — and often a contractual requirement. But "how much?" has no headline answer, because insurers price each practice on its own risk profile.
Below we explain exactly what moves the price, the cover-limit options you will usually choose between, and how a broker helps you avoid paying for the wrong cover.
What drives the cost of a quantity surveyor's PI premium
Underwriters build your premium from a handful of factors. Understanding them helps you see why two similar-sounding firms can be quoted very differently.
- Annual fee income (turnover). This is the single biggest rating factor. Higher fee income generally means larger projects and greater potential exposure, so premiums scale with it.
- The activities you perform. Traditional cost estimating and bills of quantities are viewed differently from expanded roles — employer's agent, contract administration, project management, expert witness work or design-related duties all change the risk.
- Your chosen indemnity limit. A higher limit of indemnity increases the premium. Your required limit is often set by client contracts or framework agreements.
- Claims and circumstances history. Prior claims, or notified circumstances that could become claims, will affect both price and the terms an insurer offers.
- Sector and project risk. Work on high-value commercial, infrastructure, cladding-related or overseas projects is rated more heavily than low-value domestic or public-sector advisory work.
- Contract value exposure. Advising on a handful of very large schemes can carry more concentrated risk than spreading fees across many small projects.
- Risk management and experience. Documented processes, qualified staff (for example RICS-regulated practices) and clear engagement terms can support better terms.
PI is almost always written on a claims-made basis, meaning the policy that responds is the one in force when a claim is made — not when the work was done. That is why continuity of cover, and run-off cover when you stop trading, matter as much as this year's price.
Typical cover-limit options
Most quantity surveyors choose a limit of indemnity based on the size of the projects they advise on and what their clients contractually require. Common options are set out below as generic choices — the right figure for you depends on your largest potential exposure, not a rule of thumb.
| Cover limit | Often suits |
|---|---|
| £1m | Smaller consultancies and sole practitioners on lower-value or domestic projects. |
| £2m | Established firms handling mid-range commercial and public-sector work, or where a client framework specifies it. |
| £5m+ | Practices on large commercial, infrastructure or high-value schemes, or where major contracts demand a higher limit. |
Two points are easy to miss. First, check whether a limit is offered on an "each and every claim" or "aggregate" basis — the difference matters if you face more than one claim in a policy year. Second, always confirm the exact limit your client contracts require, because being under-insured against a contractual obligation can leave you exposed even if you hold a policy.
Get a quote priced to your actual fee income and project mix — not a generic estimate.
Get a PI quote →If you are RICS-regulated
Quantity surveyors and firms regulated by the Royal Institution of Chartered Surveyors (RICS) must hold PI cover that meets the RICS minimum requirements, including approved policy wording, minimum limits linked to turnover and, in many cases, run-off cover. If this applies to you, your policy must satisfy those standards — not just be the cheapest available. A broker familiar with RICS terms can confirm a policy is compliant before you buy. It is worth knowing what a professional indemnity insurance broker is actually required to do for you.
How a broker helps you get the right price
Because PI is individually rated, the value of a broker is not simply "finding a lower number." It is making sure the risk presented to insurers is accurate and well-managed, so you pay for the cover you genuinely need. A good broker will:
- Present your fee income, activities and controls clearly so underwriters price you fairly rather than defensively.
- Match your indemnity limit and basis to your contracts and largest realistic exposure.
- Check exclusions that matter to surveyors — for example cladding, fire safety or specific project types.
- Manage continuity, notifications and run-off so a claims-made policy actually responds when you need it.
If your work has changed — new sectors, larger projects or added services — it is worth reviewing your cover rather than simply renewing. You can start a quote online and we will build the cover around your practice.
Common questions
Is PI insurance a legal requirement for quantity surveyors?
There is no single statute making PI compulsory for every quantity surveyor, but RICS-regulated firms must hold it, and most client contracts and public-sector frameworks require it. In practice, it is difficult to trade professionally without it.
Does a bigger project mean I automatically need a higher limit?
Often, yes — your limit should reflect your worst realistic loss, and larger contracts increase that figure. Always check the specific limit your client's contract requires before agreeing terms.
Why might my premium rise even without a claim?
Increased fee income, moving into higher-risk sectors, adding services, or broader market conditions can all raise the price. A rise does not necessarily reflect anything you did wrong — it reflects a change in the risk being insured.
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.
Typical PI premiums for quantity surveyors (from our own quote data)
Based on quotes we arranged, a QS practice with around £100,000 of annual fee income typically pays £950 to £1,700 a year for £1m of professional indemnity cover (clean claims history, standard risk profile). The full range by size:
| Annual fee income | £1m limit — typical premium | £2m limit — typical premium |
|---|---|---|
| £25,000 | £400 – £725 | £475 – £875 |
| £50,000 | £625 – £1,100 | £750 – £1,300 |
| £100,000 | £950 – £1,700 | £1,150 – £2,000 |
| £250,000 | £1,700 – £2,950 | £2,050 – £3,550 |
| £500,000 | £2,600 – £4,550 | £3,150 – £5,400 |
| £1,000,000 | £4,000 – £7,000 | £4,800 – £8,300 |
Source: Apex Insurance Brokers’ own rate model, fitted to 20 real quotes we arranged for quantity surveyors. Figures are annual baseline premiums before Insurance Premium Tax, assuming no claims history and a standard risk profile; claims and higher-risk work increase premiums. Your quote may differ. Model last generated 2026-08-22; page reviewed 22 August 2026. Use the interactive tool above for your own figures.