The short answer for most UK consultants is that professional indemnity insurance is not required by a regulator, but is almost always required by the client contract you are trying to sign. There is no single statutory scheme that mandates PI for consultants in the way the SRA mandates it for solicitors or RICS for surveyors. In practice, the framework contract or master services agreement you are asked to accept will insist on it — and the moment you accept, the requirement becomes contractually binding.
Two legal foundations sit underneath the commercial reality. Section 13 of the Supply of Goods and Services Act 1982 implies into every contract for professional services a term that the supplier will carry out the service with reasonable care and skill. The common-law standard for professional negligence, set out in Bolam v Friern Hospital Management Committee [1957] 1 WLR 583, judges a professional against the standard of the ordinary skilled person exercising and professing to have that special skill. Between them, these give a disappointed client a clear route to a claim. PI insurance is the mechanism that pays for the defence and, where appropriate, the settlement.
Most professional services contracts specify a minimum limit of indemnity — commonly between £1 million and £5 million for each and every claim, sometimes on an aggregate basis. Public sector framework contracts and larger private sector buyers tend to sit at the higher end. Contracts often require the cover be maintained for a run-off period of six or more years after the contract ends, reflecting the limitation period under the Limitation Act 1980.
Clients may also ask for public liability cover of a similar limit, employer's liability if you employ anyone, and cyber liability where the engagement involves client data. Apex, as an FCA-authorised insurance broker, treats these requirements together rather than in isolation — the conduct rules that govern broker distribution are set out in ICOBS 2.
A minority of consultants — sole traders working with individual clients on modest engagements — do operate without PI. That may be tenable while the work stays small and the client is content, but the exposure remains. A single dissatisfied client with a plausible claim can generate legal costs far in excess of the annual premium, and the personal assets of an unlimited-liability sole trader are directly at risk.
Read the engagement letter before the contract. A well-drafted letter can cap your liability at the fee, or at a multiple of the fee, which reduces the exposure the PI policy has to respond to. Where the client is a commercial party, you owe them the duty of fair presentation under section 3 of the Insurance Act 2015 when you present the risk to the insurer, so the accuracy of what you tell your broker matters. Your retention should reflect the type of claim you might face; a single large deductible on a small book can leave you paying most of a routine claim yourself.
The exposure profile varies by discipline. Management consultants advising on strategy or transformation face claims tied to project outcomes; losses can be large and causation contested. HR consultants face claims where the loss is often a tribunal award or settlement figure. Marketing consultants face claims tied to brand, campaign performance, or intellectual property. Environmental consultants advising on contamination, planning, or ESG reporting face claims that can crystallise many years after the advice was given. IT consultants sit alongside the wider technology sector — the professional negligence exposure is compounded by data and cyber risk, and the IR35 rules affect how the engagement is structured (see our note on IR35 and contractor PI insurance and the broader IT professionals PI insurance guide).
Consultants working in disciplines with a chartered body — the CMI for management, the CIPD for HR, BCS for IT, IEMA for environmental — often carry the designation as a signal of competence. Chartered status does not, in itself, require PI. The requirement to carry cover comes from the client contract. For related disciplines see our guides for accountants and management consultants.
A management consultant working on public sector transformation projects finds that the framework contract requires £5 million professional indemnity and £5 million public liability. The consultant's revenue base does not justify a single primary policy at £5 million, so a layered structure is arranged — £2 million on the primary policy, with a £3 million excess layer above it. Because the consultant operates through a personal service company arrangement, IR35 is considered in parallel; the engagement is priced and documented so the inside-IR35 or outside-IR35 position is clear before the first invoice is raised. The engagement letter caps liability at three times the fee, with carve-outs for fraud and personal injury. The primary and excess policies sit on the same claims-made basis with an aligned retroactive date.
Apex Insurance Brokers Limited is authorised and regulated by the Financial Conduct Authority. Firm reference number 724952. This entry is general information, not advice on any particular policy.