What is the limitation period for professional negligence?

Six years from the date of the negligent act (Limitation Act 1980, s.5). However, s.14A extends this to three years from the date you knew (or ought to have known) about the negligence — useful for claims where the harm only emerges later. Long-stop limit is 15 years.

Do I need an expert witness?

For complex cases, yes — the court relies on expert evidence to determine whether the professional fell below the standard of competent practitioners. For straightforward cases (an accountant who clearly missed a deadline, a surveyor whose written report contradicts the visible facts), expert evidence may not be necessary. The Bolam test does the work.

What about claims over £10,000?

They go to the fast track or multi-track, where solicitors are usually involved on both sides and costs are recoverable. Many claimants voluntarily limit a claim above £10k to keep it on the small claims track and avoid the cost-recovery exposure.

Can I claim against a professional whose firm has dissolved?

You may be able to claim against their professional indemnity insurer directly under the Third Parties (Rights against Insurers) Act 2010. Most regulated professions (solicitors, accountants, surveyors, architects) must carry PII.

Should I complain to the regulator first?

Often a useful parallel step but not a substitute. Regulators (SRA for solicitors, ICAEW/ACCA for accountants, RICS for surveyors) can sanction the professional and award limited compensation, but full damages require a court claim.

What if I signed a contract limiting their liability?

Limitation clauses in consumer contracts must be fair under the Consumer Rights Act 2015. A clause that excludes liability for negligence is often unenforceable. Get specific advice on your contract.

A professional made a mess. You paid the price.

How to claim against an accountant, surveyor, IT consultant, or other professional whose negligent work caused you financial loss.

A professional you engaged owed you a duty to exercise the skill and care of a reasonably competent member of their profession.

Their work fell below that standard. Bolam test: would a reasonable body of competent practitioners in that field have done what they did?

Their breach caused your loss. But for their negligence, you would not have suffered the harm.

You suffered actual financial loss as a result. Inconvenience or distress alone is not enough.

Complain to the firm first and give them eight weeks to answer. If you are not satisfied, the Legal Ombudsman will look at it free of charge, and can order the firm to put things right, refund fees, or pay compensation. You normally have six months from the firm’s final response.

Complain to the firm, then take it to the Financial Ombudsman Service. It is free, it is usually quicker than court, and if you accept the decision it binds the firm. This route matters most where the loss is large, because the Ombudsman can award more than the small claims track allows.

RICS-regulated firms must operate a complaints handling procedure and belong to an approved redress scheme. Ask for a copy of the procedure in writing — the scheme is free to you and the firm pays the case fee.

ICAEW, ACCA and CIMA all run complaints schemes for their members. They can discipline the accountant and, in some cases, direct limited redress, but they will not award full damages for your loss.

The Architects Registration Board handles conduct and competence. RIBA members are also subject to its code. Again, useful pressure and a useful paper trail, but not full compensation.

The four elements you must prove

Negligence is a legal test, not a feeling. All four must be present.

Profession	Typical example
Accountant	Filed your tax return wrong, you paid HMRC penalties.
Surveyor	Missed serious defect in a pre-purchase survey, cost you tens of thousands to put right.
IT consultant	Built a website that did not work, charged £5,000, you had to pay someone else to redo it.
Architect	Designs failed planning permission, you wasted fees and time.
Conveyancer	Missed a restrictive covenant on title that affects what you can do with your property.

The Bolam test in plain English

The standard isn’t whether the professional was the best in their field — it’s whether

a reasonable body of competent practitioners

in that profession would have done what they did. If yes, no negligence. If no — even if their action was within the range of acceptable practice — there may be a claim.

This is named after Bolam v Friern Hospital Management Committee [1957], originally a medical case but now applied across all professions. It sets a high bar: novel approaches and judgement calls within the profession’s acceptable range are not negligent, even if they turn out badly.

Try the free route before you pay a court fee

Most regulated professions sit under an ombudsman or a redress scheme. These cost you nothing, they do not carry the risk of a court fee you might not get back, and a finding in your favour is useful evidence if you do end up issuing a claim. The trade-off is that some schemes cap what they can award, and using one may close off the court route for the same complaint — so read the scheme rules before you accept an offer.

The pre-action protocol, step by step

Professional negligence has its own pre-action protocol, and it is stricter than the general one. Follow it. Judges read the correspondence, and a claimant who issued without giving the professional a fair chance to investigate can lose costs even after winning the argument.

The three-month investigation window is the part people find hardest. It feels like nothing is happening. It is also the window in which most claims settle, because the professional\u2019s insurer is now involved and weighing the cost of defending against the cost of paying.

What you can actually recover

Damages put you back in the position you would have been in had the work been done competently. In practice that usually means three things:

The cost of putting it right
— a second survey, corrective building work, another accountant redoing the return.
— what you paid the professional for work that was of no use to you.
Consequential loss that was reasonably foreseeable
— the HMRC penalty that followed the late filing, the rent you paid while the flat was uninhabitable.

What you generally cannot recover on the small claims track is compensation for the stress of it, or the time you personally spent sorting it out. Keep every invoice and quote: the court works from documents, and an unevidenced figure tends to be treated as a guess.