Business Management · Professional negligence

Causation, Remoteness and Damage in Professional Negligence

Updated 11 October 2026 · Fact-checked

To succeed in negligence, the claimant must show the breach caused the loss (the but-for test), that the loss was not too remote (of a type reasonably foreseeable), and that recoverable damage exists. Pure economic loss is recoverable mainly where there is an assumption of responsibility, as in Hedley Byrne.

Understand Causation, Remoteness and Damage

A professional can owe a duty and breach it, yet still not be liable. The claimant must also prove the breach caused real loss. Without that, there is no claim. This is why causation and damage are separate elements from duty and breach.

The first question is factual causation. The usual tool is the but-for test: but for the defendant's breach, would the loss have happened? If the loss would have happened anyway, the breach did not cause it. The claimant must prove this on the balance of probabilities, meaning more likely than not.

The second question is remoteness. Some losses follow from a breach but are too far removed to be fairly charged to the defendant. The general rule is that the defendant is liable only for loss of a kind that was reasonably foreseeable when the breach occurred. The exact size of the loss, or the exact way it happened, need not be foreseeable. The type of harm must be. Under the egg-shell skull rule, you take the victim as you find them.

The third question is damage. Negligence is not actionable without damage. Damage can be physical injury, damage to property, or financial loss. Pure economic loss is financial loss that does not flow from physical injury or property damage. Courts are cautious about it, because one careless statement could create huge liability to an unlimited number of people.

In Hedley Byrne v Heller, the House of Lords accepted that careless advice can create liability for pure economic loss where the adviser assumes responsibility and the other party reasonably relies on the advice. This matters for actuaries, whose advice is often relied on by clients and third parties for financial decisions. A disclaimer can affect whether responsibility was assumed.

Key rules to remember

But-for test: Causation proved if: but for the breach, the loss would not have occurred; Claimant proves it on the balance of probabilities. If the loss would have happened anyway, the claim fails on causation.
Remoteness rule: Recoverable loss = loss of a type reasonably foreseeable at the time of the breach; The type of harm must be foreseeable. The extent or exact manner need not be.
Elements of negligence: Duty of care + Breach + Causation + Damage not too remote; All elements must be proved. Missing one defeats the claim.
Pure economic loss (Hedley Byrne principle): Liability if: assumption of responsibility + reasonable reliance by the claimant; Applies to careless advice or statements causing financial loss with no physical damage.
Measure of damages: Damages = loss suffered ÷ aim: put the claimant in the position as if no negligence occurred; Compensation, not punishment. Read the ÷ as a reminder of the aim, not a calculation.

How to solve Causation, Remoteness and Damage questions

Use this order for any problem question. Apply each step to the facts given, and say what is missing if a step fails.

1Confirm duty and breach briefly. State whether they are given or assumed, then move on.
2Identify the loss the claimant suffered. Classify it: personal injury, property damage, consequential financial loss, or pure economic loss.
3Apply the but-for test. Ask what would have happened without the breach. If the loss would have occurred anyway, conclude there is no causation.
4Check for intervening acts, such as a third party's decision or the claimant's own act, that may break the chain of causation.
5Apply remoteness. Ask whether this type of loss was reasonably foreseeable when the breach occurred.
6If the loss is pure economic loss, ask whether the professional assumed responsibility and whether the claimant reasonably relied on the advice.
7State the likely outcome and the damages aim: put the claimant back in the position they would have been in without the negligence. Mention mitigation if relevant.

Quickest way: Three-gate check: cause, kind, claim

When to use it: Use it for multiple-choice questions and short written parts when time is tight.

Gate 1, cause: do the but-for test. If the loss happens anyway, stop. No liability.
Gate 2, kind: is the type of loss foreseeable? If not, it is too remote. Stop.
Gate 3, claim: if the loss is purely financial, look for assumption of responsibility and reliance. If absent, expect no recovery.
If all three gates pass, damages aim to restore the claimant's position.

Common mistakes in Causation, Remoteness and Damage

Assuming a breach of duty is enough to be liable.
Students focus on the careless act and forget the claimant must also prove loss caused by it.
Fix: Always write a separate causation paragraph. Ask what would have happened without the breach.
Applying the but-for test the wrong way round.
The wording is easy to confuse with asking whether the breach could have caused loss.
Fix: Remove the breach from the story. If the loss still happens, there is no causation.
Requiring the exact loss or manner to be foreseeable under remoteness.
Students overstate the rule.
Fix: Say that the type of harm must be foreseeable. The extent and precise way it occurs need not be.
Treating all financial loss as recoverable.
Students do not separate consequential loss from pure economic loss.
Fix: Classify the loss first. For pure economic loss, look for assumption of responsibility and reliance.
Ignoring a disclaimer or the purpose of the advice.
Students stop at the existence of advice.
Fix: Check whether the adviser knew the advice would be relied on for a purpose, and whether a disclaimer limits assumed responsibility.

Worked examples

Example 1

An actuary carelessly miscalculates a scheme's liabilities. The trustees, however, had already decided to wind up the scheme for unrelated reasons before receiving the report, and would have done so whatever it said. They claim the cost of winding up. Will the claim succeed on causation?

Show the solution

Identify the loss claimed: the cost of winding up the scheme.
Apply the but-for test: but for the actuary's error, would the trustees have incurred this cost?
The facts say they had already decided to wind up and would have done so anyway.
So the loss would have occurred without the breach.
The breach did not cause this loss.

Answer: The claim fails on causation. The but-for test is not satisfied, because the winding-up cost would have been incurred even without the actuary's error.

Example 2

An actuary carelessly advises a company, which he knows will rely on the advice to decide whether to buy a business. The company buys it and suffers a purely financial loss with no physical damage. A year later, a separate market crash of an unrelated kind causes additional loss. Discuss recoverability.

Show the solution

Classify the loss: it is pure economic loss, as there is no injury or property damage.
Check assumption of responsibility: the actuary knew the company would rely on the advice for this purpose, so responsibility was assumed.
Check reliance: the company reasonably relied on it in deciding to buy. Hedley Byrne principle is satisfied, subject to any effective disclaimer.
Apply but-for to the first loss: but for the careless advice, the company would not have bought on those terms, so causation is shown if so proved.
Treat the later crash separately. Ask whether it was a loss of a foreseeable type caused by the advice or an independent event.
A market crash unrelated to the advice is an independent cause and is unlikely to be attributed to the actuary.

Answer: The company can likely recover the loss caused by the careless advice under the Hedley Byrne principle, if causation is proved. The additional loss from the unrelated crash is unlikely to be recoverable, as it was not caused by the breach and is too remote.

Exam tips

Write causation and remoteness as separate headings in written answers. Examiners give marks for each.
State the but-for test in one clear sentence, then apply it to the facts.
For pure economic loss, always name both assumption of responsibility and reliance.
In multiple-choice questions, watch for options that wrongly say the exact loss must be foreseeable.
Use the facts to find intervening events. They are often the hidden point of the question.

Practice questions from Professional negligence

Causation, Remoteness and Damage: frequently asked questions

What is the but-for test in negligence?

It asks whether the loss would have happened but for the defendant's breach. If it would have happened anyway, the breach did not cause it. The claimant must prove causation on the balance of probabilities.

What is remoteness of damage?

It limits liability to loss of a type that was reasonably foreseeable when the breach occurred. The exact extent or manner of the loss need not be foreseeable. Loss outside that limit is too remote to recover.

What is pure economic loss and when can it be recovered?

It is financial loss not resulting from physical injury or property damage. Courts allow recovery mainly where the defendant assumed responsibility and the claimant reasonably relied on the advice, as in Hedley Byrne.

Why does this matter to actuaries?

Actuaries give advice that others rely on for financial decisions. Losses from careless advice are usually financial, so the Hedley Byrne principle and the causation rules decide whether a claim can succeed.