What Is Professional Indemnity Insurance? A Plain-English UK Guide

Professional indemnity insurance (PII, also called PI insurance) protects your business when a client says your work caused them financial loss. It pays two things: the compensation you may owe the client, and your own legal defence costs. Those two payouts shield your business and personal assets after an honest slip.

The Association of British Insurers (ABI) defines it as cover that meets the cost of compensating a client for loss or damage caused by negligent services or advice. That word "negligent" matters. PI is built for the good-faith error: the wrong figure in a report, the design that does not work, the advice that misses something.

Here is the part people find surprising. You do not need to have been careless on purpose. A client only has to argue that your professional work fell short and cost them money. In my experience, defending that argument gets expensive even when you are plainly in the right, which is why the policy pays your legal bills as well as any settlement. For most professionals, one large claim without cover could swallow a year of income or more.

PI covers claims that your professional work caused a client financial harm: negligence, bad advice, breaches of confidentiality, intellectual property slips, lost documents and defamation. It pays both compensation and defence costs. It does not cover physical injury, property damage, employee injuries or deliberate wrongdoing.

A lost laptop full of client records is a common trigger, and I have seen it catch out firms who thought they were careful. If that loss also exposes personal data, a separate cyber insurance policy can cover the breach-response side, such as notifying customers and the regulator.

These two share a word but do completely different jobs. Professional indemnity protects a business against claims that its work caused a client financial loss. "Indemnity insurance" in a house purchase is a one-off policy that protects a property buyer against a legal defect in the home, such as missing planning permission or a breached restrictive covenant.

Search data shows this trips people up. The term "indemnity insurance" draws around 14,800 UK searches a month, and most of that demand is about the property meaning, not the business product. So if you are buying a home and your solicitor mentions indemnity insurance for a title defect, that is the conveyancing policy: a small, single premium that covers one specific legal risk on the property.

Professional indemnity is a different animal. It is an ongoing business policy, renewed each year, that responds when a client sues you over your professional work. If you run a business that gives advice or delivers a service, professional indemnity is the product this guide is about.

Yes. "Professional indemnity insurance", "professional liability insurance", "errors and omissions insurance" (often shortened to E&O) and "PI insurance" all describe the same product. The wording changes, the cover does not.

The difference is mostly geography. "Errors and omissions" and "professional liability" are the terms you will see in the United States and in international contracts. "Professional indemnity" is what UK insurers, brokers and regulators use. So if an overseas client asks for proof of your E&O cover, your UK professional indemnity policy is what they mean. When you compare quotes, treat these labels as interchangeable and focus on the cover limit and terms instead.

Anyone paid for advice, a service, a design or a specification should think about PI. That takes in consultants, IT contractors, accountants, architects and engineers, chartered surveyors, marketing, PR and design agencies, counsellors and coaches. It applies whether you trade as a sole trader or a limited company.

For some professions it is not a choice at all. The table below maps common professions to the body that requires PI cover.

Plenty of professionals who face no regulator still carry PI, because their clients demand it. Public sector tenders, corporate contracts and agency framework agreements routinely ask for proof of cover, often at a set limit, before they will sign.

PI is not a blanket legal requirement in the UK. It becomes compulsory for specific regulated professions. That list includes FCA-regulated firms, solicitors under SRA minimum terms, architects under the ARB, chartered surveyors under RICS, many health professionals under HCPC rules, and regulated immigration advisers.

Where cover is compulsory, the consequence is blunt. You cannot lawfully practise or stay on the register without it, and any successful claim lands on you personally. Regulated immigration advisers, for example, must hold PI to be authorised by the Immigration Advice Authority (IAA, formerly the Office of the Immigration Services Commissioner).

If no regulator covers your trade, the law does not force you to buy PI. A client contract still can. Once you sign an agreement that requires professional indemnity cover, that requirement binds you, even though no statute created it.

They cover opposite risks. Professional indemnity covers financial loss caused by your advice or work. Public liability insurance covers physical injury or property damage your business causes a third party, such as a visitor tripping in your office. Many professionals hold both, because a single incident rarely fits neatly into one policy.

There is a third policy to watch. Employers' liability insurance becomes compulsory the moment you take on staff. Under the Employers' Liability (Compulsory Insurance) Act 1969, you must hold at least £5 million of cover, with fines for going without.

PI is usually written on a "claims-made" basis. Three features follow from that, and each one affects whether you are actually covered when a claim lands.

1. 1Claims-made basis. The policy pays only for claims made against you while the policy is live, no matter when you did the work. That is why claims-made cover, as the ABI explains, only works if you keep it running without gaps. Let it lapse and an old claim has nothing to respond to.
2. 2Retroactive date. This is the date your cover reaches back to. It keeps you protected for past work when you switch insurer, so your history moves with you rather than dropping into a gap.
3. 3Run-off cover. When you retire, close the business or stop trading, run-off cover keeps responding to claims that surface later. A client can generally bring a claim for up to six years under the Limitation Act 1980, so run-off should last at least that long.

Run-off matters even if you are simply leaving a regulated field. HCPC guidance notes that a claim can arrive well after you stop practising, so cover for that tail is worth sorting before you hand back your registration. It is one thing I always tell people who are winding down.

Cover limits usually run from £50,000 to £5 million, and £1 million to £2 million is the common choice for small and medium firms. Price depends on your profession, turnover, chosen limit, claims history and excess. According to UK market data, entry-level policies can start from around £5 to £10 a month for low-risk sole traders.

Limits come in two shapes, and the difference is easy to miss. An "any one claim" limit pays the full amount for each separate claim in the year. An "in the aggregate" limit is a single ceiling for every claim added together, so two claims share one pot. For higher-risk work, "any one claim" gives you more headroom.

Your excess is the first slice of any claim you pay yourself ("excess" is the UK term; a US policy would call it a deductible). Some professions have a floor set for them: solicitors must hold at least £2 million to £3 million per claim under SRA minimum terms. For a fuller breakdown by profession and turnover, a dedicated cost guide is the next step.

You can buy PI directly from an insurer or through a broker. As an independent, FCA-regulated broker, DigiCare Insurance compares insurers so you get the right limit for your profession, not one carrier's default setting. That matters most when your contracts or regulator specify a minimum you have to meet.

If you would rather find cover another way, the British Insurance Brokers' Association (BIBA) runs a find-a-broker service, and you can confirm any firm is authorised on the FCA register. Once your professional indemnity insurance is in place, you will get a certificate you can show clients as proof of cover.