What must a professional negligence claim prove?
The precise cause of action depends on the retainer and facts, but a typical claim examines the scope of the professional's duty, whether the required standard was breached, whether that breach caused the alleged loss and what loss is legally recoverable.
A poor outcome is not automatically negligence.
The central questions are what the professional was retained to do, what a reasonably competent professional should have done in that context, and what would probably have happened if the alleged error had not occurred.
The four core issues
Duty and scope
The retainer, engagement letter, instructions and professional context define what the defendant was responsible for doing.
Breach
The court considers whether the conduct fell below the applicable professional standard. Expert evidence may be required.
Causation
Even a clear mistake does not create liability unless it caused the loss claimed. The counterfactual outcome often becomes the central dispute.
Loss
Loss must be evidenced and legally recoverable. Valuation can require financial, valuation or other expert evidence.
Pre-action procedure
Professional negligence disputes are ordinarily approached with the Professional Negligence Pre-Action Protocol in mind. A properly prepared claim should identify the alleged duty, criticism, causal case and loss, while a response should engage with those issues rather than simply deny liability. The protocol also encourages early exchange of information and consideration of settlement or ADR.
Limitation
Limitation can be complex. Contract and tort claims commonly engage six-year periods, but different accrual dates, latent damage provisions, contractual terms and other exceptions may affect the position. Do not assume a claim is in time because the consequences were discovered recently; limitation should be checked at the outset.
Types of professional disputes
Depending on scope and expertise, professional negligence may arise from legal services, accountancy and tax advice, financial or commercial advice, surveying, valuation or other professional retainers. Some sectors have specialist regulatory regimes or technical standards, and specialist counsel or experts may be required.
For defendants and professionals
A Letter of Claim should be reviewed against the retainer, contemporaneous file and alleged counterfactual. Early notification to insurers may be essential. Preserve the full file, avoid informal admissions and consider whether the claim misconstrues the scope of duty, causation or valuation.
Settlement, Part 36 and costs
Professional negligence litigation can become expert-heavy and expensive. Part 36 offers, mediation and targeted settlement discussions can materially affect costs exposure. The tactical value of an offer depends on the evidence and timing, not merely the headline sum.
Frequently asked questions
Do I need an expert?
Often, particularly where breach depends on technical professional standards. Not every issue requires expert evidence, and the need should be assessed proportionately.
Can I sue because my solicitor lost my case?
An adverse result alone is not enough. The question is whether there was an actionable breach and whether, without it, the underlying outcome would probably have been materially different.
Can professional negligence cases settle before proceedings?
Yes. A strong pre-action process can clarify the issues and create opportunities for negotiation or mediation before court proceedings are issued.
What should I send you?
Send the engagement or retainer documents, key advice or reports, the alleged error, correspondence about the problem, evidence of loss and any Letter of Claim or response already received.