Duty of Care: The Foundation of Every Negligence Claim

Every professional negligence claim under English law rests on the same foundation: before a solicitor, accountant, surveyor, financial adviser, or any other professional can be held liable for your losses, you must first establish that they owed you a duty of care. Without a duty, there is no claim, however careless the conduct and however severe the loss. Yet duty of care is also the element that prospective claimants misunderstand most often. Some assume that any professional whose work touched their affairs can be sued; others wrongly conclude they have no claim because they never signed a contract with the professional concerned. The reality lies between those positions, and understanding it is the essential first step in assessing whether you have a viable claim. This article explains how a duty of care arises under English law, the standard of care professionals must meet, when duties extend beyond the immediate client, and how professionals attempt to limit or exclude their duties, together with the practical steps to take if you believe a duty owed to you has been breached.

The Retainer: Where Most Duties Begin

In the great majority of cases, the duty of care arises from the professional relationship itself. When you instruct a professional and they accept those instructions, whether recorded in a formal engagement letter, a retainer, or simply by conduct, a contract comes into existence. That contract carries with it an obligation to perform the services with reasonable care and skill. For consumers, this term is implied by the Consumer Rights Act 2015; for businesses, by the Supply of Goods and Services Act 1982. The professional’s duty in contract is therefore automatic: it does not need to be written down, and it cannot be avoided simply because the engagement letter is silent about it. Critically, English law also recognises that a professional owes a concurrent duty in tort alongside the contractual duty. This matters for practical reasons: the limitation period in tort runs from when damage was suffered rather than when the breach occurred, which can give a claimant valuable additional time where the consequences of negligent work emerged long after the work was done. A claimant is generally entitled to advance their claim on whichever basis is more advantageous

The Scope of the Duty: What Was the Professional Actually Engaged to Do?

Establishing that a duty exists is only the beginning; defining its scope is where claims are won and lost. A professional’s duty extends to the tasks they were retained to perform, interpreted sensibly in their context but not to every aspect of the client’s affairs. A conveyancer instructed on a purchase is not thereby responsible for tax planning; an accountant preparing statutory accounts is not automatically advising on the merits of the business’s contracts. At the same time, the courts recognise that a professional cannot take an artificially narrow view of their instructions: where a competent practitioner would have identified an obvious risk connected to the work and warned the client about it, a failure to do so may itself be a breach, even if the risk sat at the edge of the express instructions. The scope of the duty also defines the losses that are recoverable. A professional is liable only for losses falling within the risk their duty was meant to guard against, not for every misfortune that follows a transaction they touched. Identifying precisely what the professional assumed responsibility for is therefore the central task in pleading and valuing any claim

The Standard of Care: What Must the Professional Live Up To?

The law does not demand perfection from professionals, and it does not judge them with hindsight. The standard is that of a reasonably competent member of the same profession, practising in the same field, at the time the work was done. A specialist holding themselves out as having particular expertise, a tax specialist, a commercial property lawyer, a forensic accountant, is measured against the standard of a reasonably competent specialist in that field, not a general practitioner. Conduct that accords with a practice accepted as proper by a responsible body of professional opinion will generally not be negligent, though the courts retain the ability to reject a professional practice that cannot withstand logical scrutiny.

An error of judgment is not automatically negligence. Professionals routinely make judgement calls between reasonable alternatives, and choosing one defensible course over another is not actionable. The question is always whether the act or omission fell outside the range of what a competent professional could properly have done, a question usually answered with the assistance of independent expert evidence from the same profession.

Duties Beyond the Client: Assumption of Responsibility

A duty of care can exist without any contract at all. Where a professional assumes responsibility for advice or services, knowing that a particular person will rely on them for a particular purpose, a duty may arise in tort towards that person, even though they never instructed or paid the professional. The principle of assumption of responsibility explains why, in appropriate circumstances, non-clients can bring claims: a beneficiary deprived of an inheritance by a negligently handled will, a lender advancing funds on the strength of a professional valuation, or a buyer relying on a report the professional knew would be shown to them.

Whether a duty to a non-client exists is intensely fact-sensitive. The courts will examine:

• Purpose and knowledge: did the professional know the advice or work product would be communicated to the claimant, and for what specific purpose?
• Reliance: was it reasonable for the claimant to rely on the professional’s work without independent advice of their own?
• Disclaimers: did the professional effectively disclaim responsibility to third parties, and is the disclaimer reasonable and enforceable in the circumstances?
• Proximity: was the relationship between professional and claimant sufficiently close, or was the claimant one of an indeterminate class the professional could never have had in contemplation?

Can Professionals Exclude or Limit Their Duty?

Modern engagement letters are drafted defensively. Professionals routinely seek to define their duties narrowly, cap their liability at a fixed sum or a multiple of fees, exclude responsibility to anyone other than the named client, and impose short contractual time limits for complaints. Some of these provisions are effective; many are vulnerable. Exclusions and limitations must satisfy statutory reasonableness controls, and the courts construe ambiguous terms against the professional who drafted them. A liability cap buried in standard terms, an unsigned engagement letter, or a disclaimer inconsistent with the way the professional actually behaved may not survive scrutiny. No prospective claimant should assume that the paperwork defeats their claim without specialist analysis, assessing the enforceability of such terms is a core part of the merits assessment our team undertakes at the outset of every case.

Specialist Advice on Duty of Care from LEXLAW

Duty of care questions decide claims before they begin: whether a non-client can sue at all, whether a disclaimer holds, whether the professional’s responsibility extended to the risk that materialised. At LEXLAW Solicitors and Barristers, our solicitors and barristers work together under one roof in Middle Temple, London, applying trial-level analysis to these questions from the first conference. We act in claims across legal negligence, financial negligence, and property negligence, giving us daily familiarity with how duty of care arguments succeed and fail across every professional discipline.

Conclusion: No Duty, No Claim — But Duties Reach Further Than You May Think

The duty of care is the foundation on which every professional negligence claim is built. It usually arises from the retainer, exists concurrently in contract and tort, extends in appropriate cases to non-clients through assumption of responsibility, and is measured against the objective standard of a competent member of the profession. Just as importantly, the attempts professionals make to exclude or shrink their duties are frequently less robust than they appear. If a professional’s carelessness has caused you significant loss, whether or not you were their client, the question of duty deserves specialist analysis before any conclusion is reached. Seek expert advice promptly, before time limits close the door.