Business Management · Professional negligence

Breach of Duty and Standard of Care in Professional Negligence

Updated 11 October 2026 · Fact-checked

Breach of duty means a professional failed to meet the standard of care the law expects. That standard is the reasonable professional with the same skill. Under the Bolam test, a professional is not negligent if they acted as a responsible body of peers would. You compare conduct with that standard.

Understand Breach of Duty and Standard of Care

A negligence claim has stages. First, the law must say you owed a duty of care. Then you must have breached it. Then your breach must have caused loss that is not too remote. This topic is the second stage. Duty asks: did you owe care to this person? Breach asks: did you fall short of the required standard?

The standard is objective. The court does not ask whether you tried hard or meant well. It asks what a reasonable person would have done in your position. For a professional, the yardstick is the reasonable professional holding your claimed skill. You cannot lower the standard by saying you were new or inexperienced. If you act as an actuary, you are judged as a reasonably competent actuary.

The Bolam test comes from an English medical case, Bolam v Friern Hospital Management Committee (1957). A professional is not negligent if they acted in line with a practice accepted as proper by a responsible body of professional opinion. It is not enough that others would have done differently. The practice may also be tested for logic: a later English case, Bolitho, said the opinion must withstand logical analysis. Indian courts have referred to these English principles in professional negligence cases. Check how your study material frames them.

For actuaries, the relevant practice comes from professional standards, guidance, and accepted methods. Following them helps your defence but does not guarantee it. Ignoring them makes breach more likely. A court may use expert actuarial evidence to say what a competent actuary would have done.

Courts also weigh the facts. They look at how likely harm was, how serious it would be, and the cost of taking precautions. They judge at the time of the act, not with hindsight. A bad outcome alone does not prove breach. An actuary can make an honest, reasonable judgement in an uncertain area and still be wrong.

Key rules to remember

Elements of negligence: Duty of care + Breach of duty + Causation + Damage that is not too remote; All elements must be proved. Breach is the second one.
Standard for professionals: Standard = reasonable professional with the skill the person claims to have; Objective test. Inexperience is not an excuse.
Bolam test: Not negligent if acted as a responsible body of professional opinion would accept as proper; A different view held by others does not make the practice negligent.
Bolitho qualification: Professional opinion must withstand logical analysis; Courts may reject an opinion that is not defensible.
Timing of judgement: Judge by knowledge and practice at the time of the act, not hindsight; A poor result is not by itself a breach.

How to solve Breach of Duty and Standard of Care questions

Use this method for any scenario or essay question on breach and standard of care.

1Identify the claimant, the professional and the loss. Note any skill the professional claimed to have.
2State briefly whether a duty of care exists. Do not spend long here if the question is about breach.
3State the standard: the reasonable professional with that skill. Say it is objective.
4Apply the Bolam test. Ask what a responsible body of peers would accept as proper in these facts.
5Check professional standards, guidance and accepted methods. Note whether the professional followed them.
6Apply the Bolitho point: can the practice be defended logically? Consider risk, seriousness of harm and cost of precautions.
7Judge at the time of the act. Ignore hindsight and the outcome alone.
8Conclude on breach. Then say causation and damage still need proof.

Quickest way: Standard, Peers, Logic, Timing

When to use it: Use in multiple-choice questions and short written parts when you have a minute or two.

Standard: write down reasonable professional with the claimed skill.
Peers: ask if a responsible body of professionals would accept the act.
Logic: ask if that practice can be defended on reason.
Timing: judge on what was known then, not the result.
State breach or no breach, and note that causation is still needed.

Common mistakes in Breach of Duty and Standard of Care

Treating a bad outcome as proof of breach.
Students link loss to fault directly.
Fix: Say breach depends on conduct against the standard. A bad result alone does not prove it.
Lowering the standard for a junior or inexperienced professional.
It feels unfair to expect expert skill from a beginner.
Fix: State that the test is objective. A person claiming the skill is judged as a reasonably competent holder of it.
Confusing duty of care with breach of duty.
Both use the phrase duty and appear together in answers.
Fix: Duty asks whether care was owed. Breach asks whether the care given fell below the standard. Keep them in separate paragraphs.
Saying the Bolam test means any accepted practice is always safe.
Students stop at the headline rule.
Fix: Add that the opinion must be responsible and logically defensible, and that courts decide the final question.
Using hindsight to judge the actuary's decision.
The facts of the loss are known when you read the question.
Fix: Ask what was known and accepted practice at the time of the act.
Ignoring causation after finding breach.
Finding fault feels like the end of the answer.
Fix: End by noting that the claimant must still prove the breach caused loss that is not too remote.

Worked examples

Example 1

An actuary values a pension scheme using a mortality assumption that some actuaries consider cautious and others consider light. The method is described in recognised professional guidance. The scheme later has a funding shortfall. The trustees allege breach of duty. Advise on breach.

Show the solution

Duty: an actuary advising trustees owes them a duty of care. Assume it exists.
Standard: the reasonable actuary with the skill claimed, judged objectively.
Bolam: the assumption is supported by a responsible body of actuarial opinion and appears in recognised guidance.
Disagreement among actuaries does not make the choice negligent.
Bolitho: the assumption must be defensible on logic. If the reasoning for it is sound, this is met.
Timing: judge using data and practice when the valuation was done. The later shortfall is hindsight.
Causation and damage are separate and not needed to decide breach.

Answer: Likely no breach, if the assumption was chosen on a logical basis in line with accepted practice. The shortfall alone does not prove negligence.

Example 2

A newly qualified actuary prices a product and misses a basic check that any competent actuary would make. The firm says she is new and should be judged on her level of experience. Explain how the standard of care applies.

Show the solution

Duty: the actuary owes care to the client. Assume it exists.
Standard: objective, set by the reasonable professional with the skill claimed.
Experience does not lower it. Holding herself out as an actuary means she is judged as a reasonably competent actuary.
Bolam: no responsible body of actuaries would accept skipping a basic check.
Conclusion on breach: the omission falls below the standard.
Note that supervision and the firm's own duties may matter for who is liable, and the claimant must still prove causation and loss.

Answer: The firm's argument fails. The standard is objective, so her inexperience is not a defence, and skipping a basic check is likely a breach.

Exam tips

Define standard of care in your first sentence: the reasonable professional with the claimed skill, judged objectively.
Always name the Bolam test and explain it in plain words rather than just quoting the case name.
Keep duty, breach, causation and damage as separate points. Examiners reward clear structure.
In scenarios, link the facts to professional standards and accepted practice, and mention timing and hindsight.
Do not conclude on liability from breach alone. Add that causation and damage must also be shown.

Practice questions from Professional negligence

Breach of Duty and Standard of Care in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

ACCA Strategic ProfessionalAudit Negligence and Duty of Care

Breach of Duty and Standard of Care: frequently asked questions

What is the standard of care for professionals in negligence?

It is the standard of a reasonably competent professional with the skill the person claims to have. It is objective. Inexperience does not lower it.

What is the Bolam test?

A professional is not negligent if they acted in line with a practice accepted as proper by a responsible body of professional opinion. It comes from an English medical case. Courts also ask whether the opinion is logically defensible.

What is the difference between duty of care and breach of duty?

Duty of care asks whether the law required you to take care towards the claimant. Breach of duty asks whether you failed to meet the required standard. Both must be proved, along with causation and damage.

Does following professional guidance protect an actuary?

It helps as evidence that the actuary acted as a competent peer would. It does not guarantee protection, because a court decides what is reasonable in the facts.