What Is Professional Negligence?
A plain English guide to what professional negligence means, what you need to prove, which professionals can be sued, and whether you have a claim worth pursuing.
Written by PDA Law Solicitors — acting for clients across England and Wales on a no win no fee basis.
No Win, No Fee Professional Negligence Claims
We take on professional negligence cases on a conditional fee agreement — you pay nothing if your claim is unsuccessful.
The Definition
Professional Negligence in Plain English
Professional negligence occurs when a person who holds themselves out as having a particular skill or expertise — a solicitor, surveyor, financial advisor, accountant, architect, engineer, or insurance broker — fails to meet the standard of care that a reasonably competent professional in their field would have provided, and that failure causes you a financial loss.
The key word is standard. The law does not require professionals to be perfect or to guarantee a particular outcome. It requires them to exercise the skill and care of a reasonably competent practitioner in their field. When they fall below that standard and you suffer a loss as a result, you may have a professional negligence claim.
Professional negligence is a civil claim — you are seeking financial compensation, not a criminal conviction. The professional does not need to have been dishonest or to have acted in bad faith. Most professional negligence claims involve honest mistakes: a solicitor who missed a deadline, a surveyor who failed to spot a structural defect, a financial advisor who recommended an unsuitable investment.
Professional Negligence vs Poor Service
Poor Service (not negligence)
- • Slow to respond to calls or emails
- • Unhelpful or dismissive attitude
- • Failure to keep you updated
- • Overcharged for work done
Remedy: complaint to regulatory body or ombudsman
Professional Negligence (potential claim)
- • Missed a limitation deadline
- • Failed to identify a structural defect
- • Gave incorrect tax advice causing a loss
- • Recommended an unsuitable investment
Remedy: civil claim for financial compensation
What You Need to Prove
The Four Elements of a Professional Negligence Claim
To succeed in a professional negligence claim, you must establish all four of the following elements. If any one of them is missing, the claim will fail.
Duty of Care
The professional must have owed you a duty of care. This is almost always established where you have engaged a professional in a formal capacity — a solicitor you instructed, a surveyor you commissioned, a financial advisor who gave you regulated advice. The duty of care is the legal obligation to act with reasonable skill and care.
Breach of Duty
The professional must have fallen below the standard of a reasonably competent professional in their field. This is judged against what a competent solicitor, surveyor, accountant, or other professional would have done in the same circumstances — not against the very best in the field, but against a reasonable, competent practitioner.
Causation
The breach must have caused your loss. This is often the most contested element. You must show that "but for" the professional's negligence, you would not have suffered the loss you are claiming. If you would have suffered the same loss regardless of the professional's conduct, the claim will fail on causation.
Loss
You must have suffered a quantifiable financial loss as a result of the breach. Professional negligence claims are about financial compensation — they are not available simply because a professional gave poor service or was unhelpful. The loss must be capable of being valued in money.
Who Can Be Sued
Which Professionals Can Be Sued for Negligence?
Any professional who holds themselves out as having a particular expertise and who owes you a duty of care can potentially be sued for negligence. The most common types of professional negligence claims we handle are:
Solicitors & Barristers
- Missed limitation deadlines
- Negligent conveyancing advice
- Poor litigation strategy
- Incorrect drafting
Surveyors
- Missed structural defects
- Inaccurate valuations
- Negligent HomeBuyer Reports
- Missed damp or subsidence
Financial Advisors
- Unsuitable investment advice
- Pension mis-selling
- Failure to explain risks
- Negligent insurance advice
Accountants
- Negligent tax advice
- Late or incorrect filings
- Inaccurate accounts
- Poor restructuring advice
Architects
- Design defects
- Planning permission failures
- Negligent project management
- Building regulation breaches
Engineers
- Structural design failures
- Negligent site surveys
- Incorrect load calculations
- Specification errors
Insurance Brokers
- Inadequate cover arranged
- Failure to disclose policy terms
- Wrong policy recommended
- Missed renewal deadlines
Time Limits
How Long Do You Have to Bring a Claim?
6 years
Standard limitation period from the date of the negligent act
3 years
From the date of knowledge — if you discovered the negligence later
15 years
Absolute longstop — no claim can be brought after this period
Act promptly. Limitation periods in professional negligence are complex and the rules on "date of knowledge" are frequently litigated. If you suspect you have a claim, seek legal advice as soon as possible — delay can be fatal to your case.
Protecting Yourself
After-the-Event Insurance
Even on a no win no fee basis, if your claim is unsuccessful you could be ordered to pay the other side's legal costs. After-the-event (ATE) insurance protects you against this risk.
Covers the other side's costs
If your claim is unsuccessful, ATE insurance pays the defendant's legal costs so you are not left with a large bill.
Deferred premium
In most cases the ATE insurance premium is only payable if your claim succeeds — so there is nothing to pay upfront.
Peace of mind
You can pursue a legitimate claim without the fear of a large adverse costs order if the case does not go your way.
We advise on the right policy
We will advise you on whether ATE insurance is appropriate for your case and help you obtain the right level of cover.
Common Questions
Frequently Asked Questions
What is the difference between professional negligence and poor service?
Poor service means the professional was slow, unhelpful, or failed to communicate well — but did not cause you a financial loss. Professional negligence means the professional's conduct fell below the standard of a reasonably competent practitioner and caused you a quantifiable financial loss. You can complain about poor service to the relevant regulatory body (such as the Solicitors Regulation Authority or the Financial Ombudsman Service), but a negligence claim requires actual financial loss.
What is gross negligence?
Gross negligence is a more serious form of negligence — conduct that falls so far below the standard of a reasonably competent professional that it demonstrates a reckless disregard for the client's interests. In practice, the distinction between negligence and gross negligence rarely affects the outcome of a civil claim for compensation, though it can be relevant in regulatory proceedings and, in extreme cases, criminal proceedings.
Do I need to prove the professional was dishonest?
No. Professional negligence does not require dishonesty or bad faith. A professional can be entirely honest and well-intentioned and still be negligent if their conduct fell below the standard of a reasonably competent practitioner. Most professional negligence claims involve honest mistakes — missed deadlines, incorrect advice, or failure to identify a problem — rather than deliberate wrongdoing.
How much does a professional negligence claim need to be worth?
There is no legal minimum, but in practice we look for claims with a realistic value of at least £25,000–£30,000. Litigation is expensive and time-consuming, and the costs of pursuing a claim need to be proportionate to the likely recovery. For smaller losses, it may be more appropriate to complain to the relevant regulatory body or ombudsman service.
Is professional negligence covered by no win no fee?
Yes — unlike most other dispute resolution work, we offer no win no fee (conditional fee agreements) for professional negligence claims. This means you pay nothing if your claim is unsuccessful. We also advise on after-the-event (ATE) insurance, which can cover the other side's legal costs if your claim does not succeed.
How long do I have to bring a professional negligence claim?
The standard limitation period is 6 years from the date of the negligent act or omission. However, if you did not discover the negligence at the time, the period may run from the date you knew (or ought reasonably to have known) about the negligence — subject to a longstop of 15 years from the negligent act. Limitation is complex and you should seek advice as soon as you suspect negligence.
What is the pre-action protocol for professional negligence?
Before issuing court proceedings, you are required to follow the Pre-Action Protocol for Professional Negligence. This involves sending a detailed Letter of Claim to the professional, giving them an opportunity to investigate and respond. The protocol is designed to encourage early settlement and avoid unnecessary litigation. Failure to follow the protocol can result in cost penalties.
Can I claim against a professional who has retired or whose firm has closed?
Possibly. Professionals are required to hold professional indemnity insurance, and in many cases run-off cover continues after a firm closes or a professional retires. We can investigate whether insurance cover is available and advise on the best route to pursue your claim.
Related Guides
More Professional Negligence Guides
How Long Do Professional Negligence Claims Take?
Realistic timescales from Letter of Claim to settlement or trial — and what causes delays.
Read guideThe Pre-Action Protocol for Professional Negligence
What the protocol requires, how to write a Letter of Claim, and what happens if the professional disputes liability.
Read guideOur Professional Negligence Service
How we handle professional negligence claims — no win no fee, ATE insurance, and specialist expertise.
Read guideThink You Have a Professional Negligence Claim?
Call us for a free initial discussion. We will tell you honestly whether we think you have a viable claim and what it is likely to be worth — before you commit to anything.