Professional Negligence Claims UK: Duty of Care, Time Limits & How to Claim

At a glance

• Legal basis: a duty of care in contract and/or tort. Where there is no direct contract between the parties, courts consider the assumption-of-responsibility principle from Hedley Byrne & Co Ltd v Heller & Partners Ltd [1964] AC 465 and the three-stage test from Caparo Industries plc v Dickman [1990] 2 AC 605 (foreseeability, proximity, and whether it is fair, just and reasonable to impose a duty).
• Standard of care: a professional's conduct is judged against the standard of a reasonably competent member of their profession, not perfection — the Bolam test, from Bolam v Friern Hospital Management Committee [1957] 1 WLR 582.
• Causation and scope of duty: it is not enough to show a mistake was made — the loss claimed must fall within the purpose of the duty the professional took on. This is the SAAMCO principle, from South Australia Asset Management Corp v York Montague Ltd [1997] AC 191, significantly clarified by the Supreme Court in Manchester Building Society v Grant Thornton UK LLP [2021] UKSC 20.
• Time limit in contract: 6 years from the breach — Limitation Act 1980, section 5.
• Time limit in tort: 6 years from when the damage occurred — Limitation Act 1980, section 2.
• Latent damage extension: a further 3 years from the date you had (or reasonably should have had) knowledge of the problem — section 14A.
• Long-stop: an absolute 15-year cut-off from the negligent act or omission — section 14B — with generally no court discretion to extend it, unlike in personal injury claims.
• Before court: the Professional Negligence Pre-Action Protocol applies to most professionals (solicitors, accountants, financial advisers and similar) and expects a Letter of Claim, followed normally by three months for the professional (usually via their insurer) to investigate and respond. It does not apply to architects, engineers or quantity surveyors, who follow a separate construction protocol, or to healthcare providers.
• Court track: claims that do not settle are generally allocated to the small claims track (up to £10,000), fast track (£10,001–£25,000), intermediate track (£25,001–£100,000) or multi-track (above £100,000, or any value the court considers too complex for a lower track).
• Alternatives: many professions run a free ombudsman or regulator complaints scheme — for solicitors, the Legal Ombudsman — which can sometimes resolve a problem without a formal claim.

What counts as professional negligence?

Professional negligence is a civil claim brought against someone acting in a professional capacity who has fallen short of the standard expected of a reasonably competent member of their profession, causing you a loss. It rests on a duty of care that can arise under a contract (the retainer or engagement letter), in the tort of negligence, or both at once, depending on how the relationship was set up.

Common examples include a solicitor missing a limitation date, a conveyancer failing to flag a restrictive covenant or defect in title, an accountant giving incorrect tax guidance, a surveyor overlooking a structural defect, or a financial adviser recommending an unsuitable investment. In every case, the claimant generally has to establish four things: duty, breach, causation and loss. Each element can be contested, and claims often turn heavily on expert evidence about what a competent professional in that field should have done.

The legal test: duty, breach, causation and loss

How a duty of care arises

A professional's duty of care can arise in two ways, which often overlap:

• In contract — from the retainer, engagement letter or terms of business agreed with the client. The contractual duty is generally to exercise reasonable skill and care in performing the agreed services.
• In tort — independently of any contract, based on an assumption of responsibility. The House of Lords' decision in Hedley Byrne & Co Ltd v Heller & Partners Ltd [1964] AC 465 established that a professional who knows, or ought to know, that someone is relying on their skill and judgment can owe a duty of care in tort even without a direct contract between them — for example, a surveyor's valuation report relied on by a lender who never instructed the surveyor directly. Where there is no direct client relationship, courts also weigh the three-stage test from Caparo Industries plc v Dickman [1990] 2 AC 605: whether the loss was reasonably foreseeable, whether there was a sufficiently proximate relationship, and whether it is fair, just and reasonable to impose a duty.

Where the claimant instructed the professional directly, duty is not usually the main battleground — the dispute more often centres on breach, causation and the scope of the duty, addressed below.

The standard of care: the Bolam test

The standard used to judge whether a professional has breached their duty comes from the case law principle usually referred to as the Bolam test, after Bolam v Friern Hospital Management Committee [1957] 1 WLR 582. Although that case concerned a doctor, the same approach is applied across the professions: a professional is not negligent if they acted in accordance with a practice accepted as proper by a responsible body of opinion in their field, even if other practitioners would have done things differently.

In practice, this means a claimant cannot succeed simply by showing that another professional would have handled the matter differently, or that the outcome was disappointing. The question is whether the professional's conduct fell below what a reasonably competent, responsible body of opinion in that profession would regard as acceptable at the time.

Causation and loss: the scope of duty (SAAMCO) principle

Showing a breach is not enough on its own — you also have to show that the breach caused a loss that the law will hold the professional responsible for. This is governed by what is often called the SAAMCO principle, taking its name from South Australia Asset Management Corp v York Montague Ltd [1997] AC 191, and significantly clarified by the Supreme Court in Manchester Building Society v Grant Thornton UK LLP [2021] UKSC 20.

The Supreme Court held that the correct approach is to ask what the purpose of the professional's duty actually was, judged objectively by reference to why the advice or service was being provided. If a loss falls outside that purpose — even if the professional was undeniably negligent and the loss would not have happened "but for" their error — it may not be recoverable. In Manchester Building Society, the Society was able to recover the costs of unwinding its position caused by relying on negligent accounting advice, because those costs fell within the purpose of the advice given.

A related distinction, addressed by the Supreme Court in BPE Solicitors v Hughes-Holland [2017] UKSC 21, is between a professional who advises on a transaction as a whole and one who only provides a limited piece of information on which the client relies alongside other considerations. Where a professional's role was limited to supplying specific information, their liability is generally limited to the consequences of that information being wrong — not every loss that flows from the client's wider decision to go ahead with the transaction. This scope-of-duty analysis is one of the most technical, and most often contested, parts of a professional negligence claim, and it is where specialist advice tends to matter most.

Time limits: the Limitation Act 1980

Limitation is one of the most important, and most commonly missed, aspects of a professional negligence claim. Once the relevant deadline passes, the claim is generally lost entirely, regardless of its merits.

• Contract claims: 6 years from the date of the breach of contract, under section 5 of the Limitation Act 1980.
• Tort claims: 6 years from the date the damage occurred, under section 2 of the Limitation Act 1980. This can be earlier than you might expect — damage can occur, and time can start running, before you are aware of it.
• Latent damage (date of knowledge): where loss only becomes apparent later, section 14A can give you 3 years from the date you had the knowledge needed to bring a claim — including knowledge you ought reasonably to have acquired.
• The long-stop: section 14B sets an overriding 15-year cut-off running from the date of the negligent act or omission, regardless of when the damage or your knowledge of it arose. Unlike the position for personal injury claims, there is generally no equivalent court discretion under the Limitation Act to disapply this 15-year long-stop for professional negligence claims involving financial loss.

Because these rules interact and the applicable date can be genuinely difficult to pin down (particularly the "date of knowledge" under section 14A), it is sensible to establish your limitation position, in writing, at the earliest possible stage — ideally before you do anything else.

Worked example: Priya's limitation dates

Priya, a fictional business owner, received negligent tax advice from her accountant in March 2015 (the negligent act). The resulting tax liability crystallised a few months later in 2015 — this is broadly when "damage" for a tort claim under section 2 would be treated as occurring, so the standard 6-year tort limitation period would have expired around 2021.

Priya did not discover the problem until HMRC opened an enquiry in September 2023, more than six years after both the advice and the damage. Because her knowledge of the problem only arose in September 2023, section 14A could still give her a fresh 3-year window from that date to bring a claim — provided the section 14B long-stop has not already expired. Here, the long-stop runs 15 years from the negligent act in March 2015, i.e. until March 2030, so section 14A remains available to Priya.

This is a simplified illustration only — establishing the actual "date of knowledge" for section 14A purposes is a fact-specific exercise and is often disputed, so it should not be relied on as a calculation for a real case.

The Professional Negligence Pre-Action Protocol

Before issuing court proceedings against most professionals — such as a solicitor, accountant or financial adviser — the courts expect the parties to follow the Professional Negligence Pre-Action Protocol, issued under the Civil Procedure Rules. The protocol does not apply to every profession: it specifically excludes claims against architects, engineers and quantity surveyors, who follow the separate Construction and Engineering Disputes protocol instead, and it excludes claims against healthcare providers, who follow the pre-action protocol for the Resolution of Clinical Disputes.

In outline, where the protocol does apply:

1. As soon as the claimant thinks there is a reasonable chance of a claim, they are encouraged to send a Preliminary Notice — a brief outline of the grievance and, if possible, an indication of value — which the professional should acknowledge within 21 days and pass to their professional indemnity insurers.
2. The claimant then sends a detailed Letter of Claim, setting out a chronology, what is alleged to have gone wrong, how the loss was caused, and an estimate of the financial loss. The professional should acknowledge this within 21 days (the Letter of Acknowledgment).
3. The professional then has three months from the date of the Letter of Acknowledgment to investigate and respond with a Letter of Response and/or Letter of Settlement, unless a longer period is reasonably agreed between the parties.
4. Where liability is not admitted in full, the parties are expected to try to resolve the claim through negotiation for up to six months from the Letter of Acknowledgment before court proceedings are issued.

The protocol does not extend the underlying Limitation Act deadlines. If a limitation date is close, a claimant can issue protective court proceedings and ask the professional to agree a stay while the protocol steps are followed, or agree a standstill agreement extending the period before a limitation defence would be raised.

The protocol is designed to encourage early, informed settlement and to narrow the issues in dispute before litigation starts. Skipping it, or not engaging with it properly, can result in cost penalties later even if you go on to win the case.

Alternatives to a formal claim: complaints and ombudsman schemes

A formal negligence claim is not always the first or only option. Many regulated professions run their own complaints process, and several have access to a free ombudsman scheme that can investigate and, in some cases, award compensation without the cost and formality of litigation. For solicitors and other legal service providers in England and Wales, that route is the Legal Ombudsman. Other professions have their own regulators and complaints bodies. Our guide to complaining to an ombudsman explains how these schemes generally work, including typical time limits — which are often different from, and shorter than, the Limitation Act deadlines described above, so check the relevant scheme's own current rules promptly.

An ombudsman or regulatory complaint and a civil claim are not always mutually exclusive, but the interaction between them (including how pursuing one can affect time limits for the other) is worth checking carefully before you commit to either route.

Evidence, experts and quantifying your loss

Professional negligence cases turn heavily on documentary evidence and expert opinion. From the outset, it helps to gather:

• The engagement letter, retainer, terms of business or contract with the professional.
• All correspondence, file notes, reports, drafts and invoices connected to the work.
• Anything showing the loss you say you have suffered, and when you first became aware of it.

Because the standard of care is measured against what a reasonably competent practitioner in the same field would have done, independent expert evidence from someone practising in that field is almost always needed to establish breach. Quantifying loss can also require specialist input — for example, a forensic accountant where the claim involves lost profits or a complex financial transaction.

Settlement, mediation and going to court

Most professional negligence claims that are properly pursued do not end up at trial. Many resolve during the pre-action protocol stage, once the professional's insurer has assessed the claim, or through mediation. GOV.UK's guide to civil mediation explains how mediation works as a voluntary, confidential process in which an independent mediator helps both sides try to reach an agreed settlement, without a judge deciding the outcome.

If a claim cannot be resolved and proceedings become necessary, general information on starting a claim is at GOV.UK's make a court claim for money guidance. Once proceedings are issued, the court allocates the claim to a track based on its value and complexity, under CPR Part 26:

| Track | Typical claim value | Notes | |---|---|---| | Small claims | Up to £10,000 | Limited costs recovery and no automatic right to expert evidence — see our small claims court FAQs; rarely suitable for professional negligence | | Fast track | £10,001 – £25,000 | Streamlined procedure, capped trial length | | Intermediate track | £25,001 – £100,000 | Introduced October 2023, with a fixed-costs regime; the court can allocate a case elsewhere if it is not suitable | | Multi-track | Above £100,000, or any value the court considers too complex for another track | Full case management, no fixed-costs cap |

In practice, professional negligence claims usually involve disputed technical evidence and multiple experts, which frequently pushes them onto the intermediate or multi-track rather than the small claims track, regardless of value.

What to do if you think a professional has been negligent

1. Gather the paperwork. Pull together the engagement letter, correspondence, invoices, reports, file notes and anything showing your loss. Build a clear chronology before doing anything else — the strength of a claim often turns on what the contemporaneous records actually say.
2. Check your time limits early. Work out the relevant date under sections 2, 5, 14A and 14B of the Limitation Act 1980. If you are close to a deadline, get advice immediately rather than waiting.
3. Check whether the general Pre-Action Protocol applies to your professional. Architects, engineers and quantity surveyors follow a different construction protocol, and healthcare providers follow the clinical negligence protocol.
4. Consider whether a complaint or ombudsman route is available first. For solicitors and some other regulated professions, a free complaints scheme may resolve the problem, or narrow it, before you commit to formal proceedings — but check its time limits separately, as they are often shorter than the Limitation Act deadlines.
5. Follow the applicable Pre-Action Protocol. Send a Preliminary Notice, then a Letter of Claim, and allow the professional's normal three-month window to investigate and respond. Skipping this step can affect costs later.
6. Get independent expert input. You will generally need an expert practising in the same field to comment on whether the work fell below the standard expected, and you may need further specialist input to quantify your loss.
7. Weigh up settlement against court. Many claims resolve through negotiation, mediation, or the professional's insurer making an offer. Litigation is expensive and the outcome is never guaranteed, so weigh the strength of the evidence, the likely recovery, and the cost of getting there.
8. Take advice early. Professional negligence claims are technical, particularly on causation and scope of duty. An early conversation with someone who can look at your specific facts and dates is usually worth more than pressing ahead alone.

This guide provides general information about professional negligence claims in England and Wales. It is not legal advice and is not a substitute for advice tailored to your specific circumstances. The law described was accurate as at August 2026 and is subject to change — always check legislation.gov.uk and GOV.UK for the most current position.

Last reviewed: August 2026 by a non-practising solicitor · Next review due: August 2027 or on legislative change.