Lesson 156. Mitigation | AQA A-Level Law
For Specification 7162
AQA A-Level Law | Free Revision Notes
Estimated study time: 40 minutes
A claimant who suffers loss because of a breach of contract cannot simply allow that loss to increase unnecessarily and expect the defendant to pay for all of it. These Mitigation A-Level Law revision notes explain the requirement to take reasonable steps to reduce loss, how the principle affects compensatory damages and why avoidable losses may not be recovered. Mitigation is expressly included within the AQA specification alongside recoverable loss, causation and remoteness. This lesson completes the main controls on contractual damages following compensatory damages and recoverable loss [Lesson 154. Compensatory damages and recoverable loss] and causation and remoteness [Lesson 155. Causation and remoteness].
Learning Objectives 🎯
By the end of this revision page, you should be able to:
Explain the principle of mitigation in contractual damages.
Explain why a claimant must take reasonable steps to reduce loss following breach.
Identify reasonable opportunities to mitigate in factual scenarios.
Determine whether a claimant has failed to mitigate.
Explain how failure to mitigate affects the amount of damages recoverable.
Apply mitigation alongside recoverable loss, causation and remoteness.
Revision Notes 📚
What is mitigation?
Mitigation is the principle that the victim of a breach of contract must take reasonable steps to reduce the loss suffered.
AQA tested this directly in its 2021 Paper 3A multiple-choice question. The statement that a victim of breach must take reasonable steps to reduce the loss suffered was treated as true.
The basic idea is:
breach occurs → claimant suffers loss → claimant takes reasonable steps to limit further loss
The defendant remains responsible for the breach.
Mitigation instead affects how much loss the claimant can recover as damages.
Mitigation as part of compensatory damages
The aim of contractual damages is compensation.
As explained in Compensatory damages and recoverable loss [Lesson 154. Compensatory damages and recoverable loss], damages aim, so far as money can achieve it, to place the claimant in the position they would have occupied had the contract been properly performed.
Mitigation prevents the claimant from increasing the damages unnecessarily after the breach.
A useful sequence is:
1. What loss has been suffered?
2. Was it caused by the breach?
3. Is it too remote?
4. Could the claimant reasonably have reduced it?
AQA expressly places all four matters within its required compensatory damages content.
The claimant must act reasonably
Mitigation does not require the claimant to eliminate every possible loss.
The requirement is to take reasonable steps.
That means the claimant is not expected to:
guarantee that their response will succeed
choose an obviously impractical alternative
incur disproportionate expenditure simply to reduce a smaller loss
Instead, the facts should be assessed to determine what a reasonable response to the breach would have been.
Example
Aisha hires specialist equipment from Ben for £1,000.
Ben commits a repudiatory breach and does not provide it.
Equivalent equipment can reasonably be obtained elsewhere for £1,200.
Aisha hires the replacement.
She has taken an obvious reasonable step to reduce the consequences of Ben's breach.
Her basic additional loss is:
$$£1,200 - £1,000 = £200$$
Mitigation does not mean that Aisha must somehow avoid all financial loss. It means she should respond reasonably to the breach.
Failure to mitigate
A claimant who unreasonably fails to take available steps to reduce the loss cannot simply make the defendant responsible for all the avoidable consequences.
The effect is on the damages recoverable.
The claimant may still establish:
a valid contract
breach
causation
a loss that is not too remote
but some of the claimed loss may nevertheless be excluded because reasonable mitigation would have prevented it.
Example
Cara contracts with Dev to hire equipment for a week.
Dev breaches on the first day.
Equivalent equipment is immediately available nearby for an additional £100.
Cara refuses to hire it and instead closes her business for the whole week, claiming £5,000 in losses.
The question is not merely whether Dev's breach created the initial difficulty.
A court would also consider whether Cara could reasonably have reduced her loss by obtaining the replacement equipment.
If so, the avoidable £5,000 loss should not automatically be recoverable.
Mitigation does not remove liability for breach
This distinction is important.
Suppose Ella breaches her contract with Faisal.
Faisal then fails to mitigate.
It would be incorrect to say:
"Because Faisal failed to mitigate, Ella is no longer in breach."
The contractual breach still exists.
The issue is the amount of compensation Faisal can recover.
So:
failure to mitigate ≠ no breach
Instead:
failure to mitigate → damages may be reduced because some loss was reasonably avoidable
Reasonable substitute performance
One of the clearest methods of mitigation is obtaining a reasonable replacement for the promised contractual performance.
Example
Grace contracts with Haris to repair a machine for £3,000.
Grace refuses to perform.
Another suitable contractor is available for £3,400.
Haris reasonably employs the replacement contractor.
The additional cost is:
$$£3,400 - £3,000 = £400$$
Haris has acted to limit his loss rather than allowing the machine to remain unusable indefinitely.
This connects directly with the expectation-loss calculations in Compensatory damages and recoverable loss [Lesson 154. Compensatory damages and recoverable loss].
Choosing a reasonable substitute
Mitigation does not necessarily require the claimant to choose the absolute cheapest imaginable option.
The issue is whether the response is reasonable in the circumstances.
Relevant factual considerations may include:
availability
suitability
urgency
cost
the contractual purpose
whether the alternative would actually meet the claimant's needs
Example
Isla's supplier breaches immediately before an important event.
Two replacements are available:
Supplier A can provide suitable goods immediately for £2,500
Supplier B charges £2,300 but cannot deliver until after the event
It may be reasonable for Isla to use Supplier A despite the slightly higher cost because Supplier B would not meet the purpose of the original contract.
The examiner should see analysis of the facts, not simply:
"She should choose the cheapest."
Avoiding unnecessary expenditure
Mitigation can also require a claimant to avoid unnecessarily expensive responses.
AQA's 2025 examination provides a particularly clear example.
Kaleb's car was retained by Henry's garage for an extended period and Kaleb paid for a taxi journey.
AQA accepted that the taxi fare might potentially form part of a damages claim, but identified a possible failure to mitigate if suitable, less expensive public transport had been available.
The analysis therefore requires comparison.
If:
a taxi cost £80
suitable public transport would have cost £10
the court could consider whether spending £80 was reasonable.
The issue is not that taxis can never be used.
The question is whether the claimant's choice was reasonable on the facts.
The Kaleb taxi example
The AQA 2025 facts are especially useful because they show how mitigation should be applied rather than merely defined.
The correct approach is not:
"Kaleb used a taxi, so he failed to mitigate."
Instead ask:
Why did Kaleb need to travel?
Was public transport available?
Was it suitable?
How much cheaper was it?
Was there any reason a taxi was necessary?
AQA's mark scheme expressly described the issue as whether public transport was available and suitable.
This wording matters.
A theoretical cheaper alternative does not necessarily mean that the claimant acted unreasonably.
Mitigation after a buyer's breach
The principle can also be illustrated where a buyer refuses to purchase goods.
Suppose:
Jack agrees to buy Keira's goods for £2,000 but commits a repudiatory breach.
If Keira can reasonably sell the same goods to another buyer, doing so can reduce her loss.
Suppose she obtains:
$$£1,800$$
from the replacement buyer.
Her basic remaining loss is:
$$£2,000 - £1,800 = £200$$
This reflects the approach to expectation damages already examined in Lesson 154.
Keira cannot ordinarily ignore an available resale opportunity, keep the goods indefinitely and claim losses which reasonable action could have reduced.
Mitigation and loss of profit
Mitigation may also reduce a claim for lost profit.
Example
Lara hires equipment from Malik for use in her business.
Malik breaches.
Lara could reasonably obtain suitable replacement equipment the same day for an additional £150 but decides not to do so.
She then claims £4,000 in lost business profit.
The argument would be:
Malik's breach initially threatened Lara's profit
replacement equipment was reasonably available
hiring it would have allowed Lara to continue operating
much of the £4,000 loss could therefore have been avoided
The failure to obtain reasonable replacement equipment may restrict the amount recoverable.
The claimant is not required to make unreasonable sacrifices
Mitigation is based on reasonable behaviour.
A claimant should not automatically lose damages merely because, with hindsight, somebody can imagine an action which might have reduced the loss.
Example
Noah's supplier breaches.
The only possible replacement supplier demands ten times the original price and cannot guarantee suitable performance.
Noah refuses.
If the alternative is genuinely unreasonable, his refusal does not automatically establish a failure to mitigate.
A strong exam answer should therefore use language such as:
"reasonable"
"available"
"suitable"
"proportionate"
rather than treating mitigation as an absolute requirement to accept any alternative.
Mitigation begins after the relevant breach
The relationship between mitigation and anticipatory breach requires particular care.
AQA's 2025 examiner report states that a duty to mitigate applies after termination following either anticipatory or actual breach, but may not apply in the same way where the innocent party initially refuses to terminate following an anticipatory breach.
This connects directly with Anticipatory breach [Lesson 152. Anticipatory breach].
Where there is a repudiatory anticipatory breach, the innocent party can potentially:
accept it and treat the contract as at an end, or
refuse to accept it and continue to expect performance
The timing of mitigation can depend upon this choice.
Accepting an anticipatory breach
Suppose Olivia contracts with Pavel to supply equipment on 1 October.
On 1 September Pavel announces that he will not perform.
Olivia immediately accepts this repudiatory anticipatory breach and treats the contract as at an end.
Once she does so, mitigation becomes relevant.
If a reasonable substitute supplier is available, Olivia should consider using it to reduce the financial consequences of Pavel's breach.
AQA's 2025 report states that mitigation applies following termination for an anticipatory breach just as it applies following termination for an actual breach.
Keeping the contract subsisting
The position is different if the innocent party refuses to accept the anticipatory repudiation.
AQA considered this directly in both 2023 and 2024.
In 2023:
Asif gave Belle advance notice that he would not perform
Belle refused to accept the repudiation
she continued to expect performance
she spent £500 fulfilling her own contractual obligations
The mark scheme stated that where the innocent party continues to expect performance, they may be entitled to incur expenditure associated with their own performance notwithstanding the standard rules on mitigation, because on that analysis no actual breach has yet occurred.
AQA used White and Carter (Councils) Ltd v McGregor as important authority in this context.
White and Carter (Councils) Ltd v McGregor
Within the supplied AQA materials, White and Carter (Councils) Ltd v McGregor is particularly important to the relationship between mitigation and anticipatory breach.
The principle used by AQA is that an innocent party may, in appropriate circumstances, refuse to accept an anticipatory repudiation and keep the contract subsisting.
On that analysis:
the time for performance has not yet arrived
the innocent party continues to expect contractual performance
they may continue doing what is necessary to perform their own obligations
the ordinary mitigation principle may therefore not yet operate in the normal way
AQA's 2023 examiner report stressed the need to connect Belle's continued £500 expenditure with her election to keep the contract subsisting, rather than merely asserting that the money was recoverable.
The Belle £500 example
The reasoning can be broken down clearly.
Stage 1: anticipatory repudiation
Asif announces seven days early that he will not perform.
Stage 2: Belle's choice
Belle refuses to accept the repudiation.
Stage 3: contract remains subsisting
Belle continues to expect Asif to perform when the contractual date arrives.
Stage 4: Belle performs her own obligations
She spends £500 which is necessary for her side of the contract.
Stage 5: mitigation issue
It might initially appear that Belle should have avoided this expenditure once Asif announced his refusal.
However, AQA accepts a strong argument based on White and Carter that, because Belle chose to keep the contract alive, the normal mitigation rule had not yet arisen in the usual way.
This is a much stronger answer than:
"Belle gets the £500 because Asif breached."
The Charles £400 example
AQA returned to a similar issue in 2024.
Dua told Charles in advance that she would not carry out agreed artwork.
Charles refused to accept the repudiation and spent £400 making alterations to his office which he had contractually promised to make in preparation for Dua's work.
The AQA mark scheme stated that if Charles chose to wait for performance, he might not have to mitigate his loss and could instead make reasonable expenditure necessary to fulfil his own contractual obligations.
The examiner report also recognised that questioning whether Charles should recover the £400 was creditworthy because the approach in White and Carter has attracted criticism.
For A-Level purposes, the important skill is recognising the mitigation issue and connecting it to Charles's election.
Do not overextend the anticipatory breach exception
The White and Carter issue should not become a reason to ignore mitigation in every anticipatory breach problem.
If the innocent party:
accepts the repudiatory anticipatory breach, and
treats the contract as at an end,
the normal mitigation principle applies.
AQA's 2025 materials make this especially clear.
Therefore:
anticipatory breach accepted → contract treated as ended → mitigation applies
but potentially:
anticipatory breach rejected → contract kept subsisting → ordinary mitigation may not yet apply in the same way
Mitigation following actual breach
The position is more straightforward once an actual breach has occurred.
Suppose:
Quinn agrees to supply goods on Monday but Monday passes without delivery.
The time for performance has arrived.
Quinn has committed an actual breach.
If Rachel seeks damages, she should take reasonable steps to reduce the resulting loss.
For example, she may need to consider:
purchasing suitable substitute goods
hiring an alternative service
reselling goods following a buyer's breach
avoiding unnecessary additional expenditure
The details will depend entirely on the facts.
Mitigation and causation are different
Mitigation should not be confused with causation.
Causation asks:
Did the defendant's breach cause this loss?
Mitigation asks:
Once the loss was threatened or began to arise, could the claimant reasonably have reduced it?
Example
Sam's breach causes Talia to need alternative transport.
So causation is established.
Talia chooses a £200 luxury transport service even though suitable ordinary transport costing £30 is readily available.
The breach may have caused the need for transport, but Talia's own decision raises a mitigation issue concerning the amount recoverable.
This distinction builds directly on Causation and remoteness [Lesson 155. Causation and remoteness].
Mitigation and remoteness are different
A loss can be:
caused by the breach
not too remote
but still reduced because the claimant failed to mitigate
Example
Uma's supplier fails to provide a vehicle.
Uma needs replacement transport, which is an ordinary and foreseeable consequence.
Suitable replacement hire is available for £300.
Uma does nothing and allows £4,000 of avoidable business losses to accumulate.
The issue is no longer principally whether commercial loss was foreseeable.
The key question is whether Uma acted reasonably to reduce it.
One loss can raise all three restrictions
Suppose Victor's supplier breaches a contract for delivery equipment.
Victor claims £5,000 lost profit.
A complete damages answer might consider:
Causation
Did lack of the equipment actually cause the lost profit?
Remoteness
Did the supplier know or ought reasonably to have known when contracting that this type of profit could be lost?
Mitigation
Could Victor reasonably have hired substitute equipment and prevented some or all of the loss?
This is the level of structured analysis that turns a damages answer from a list of legal terms into applied legal reasoning.
The effect of successful mitigation
Where the claimant takes reasonable mitigating action, the remaining reasonable loss may form part of the damages claim.
Example
Willow's supplier breaches.
Replacement goods should have cost £2,000 under the original contract.
Willow reasonably obtains them elsewhere for £2,400.
Additional loss:
$$£2,400 - £2,000 = £400$$
The £400 represents the loss remaining despite Willow's reasonable attempt to mitigate.
The principle does not punish a claimant for still having some loss after taking sensible action.
The effect of failure to mitigate
Where the claimant unreasonably fails to reduce the loss, the damages should reflect the loss which could reasonably have been avoided.
Example
Xavier's original contract price is:
$$£5,000$$
After the breach, equivalent performance is reasonably available for:
$$£5,500$$
Had Xavier acted reasonably, his additional loss would have been:
$$£5,500 - £5,000 = £500$$
Instead, Xavier deliberately waits several months. The replacement price eventually rises to:
$$£8,000$$
He cannot simply assume that the defendant will bear the entire later increase.
The court would consider whether the additional loss resulted from Xavier's unreasonable failure to take reasonable mitigating action.
The important conclusion is:
Avoidable loss may be excluded from the damages award.
Mitigation does not mean the claimant has to protect the defendant
It can be helpful to understand the principle correctly.
The claimant is not expected to act for the defendant's benefit.
The claimant is protecting their own compensatory position by responding reasonably to the breach.
If reasonable steps are taken, the defendant remains liable for recoverable losses which remain.
If reasonable steps are not taken, the defendant does not have to compensate losses which reasonable action would have avoided.
Expenses incurred in mitigating loss
A reasonable attempt to mitigate can itself involve expenditure.
Example
Yasmin's contractor breaches.
Yasmin reasonably pays £250 for temporary work needed to prevent much greater losses while she finds a replacement contractor.
The fact that Yasmin spends money does not automatically mean she failed to mitigate.
The expenditure may itself be a sensible response designed to reduce the overall loss.
The key question remains reasonableness.
Mitigation and replacement markets
AQA's examiner materials on contractual damages repeatedly use market comparisons when identifying expectation loss.
This links naturally to mitigation.
After a breach, ask whether the claimant could reasonably:
buy substitute goods
obtain replacement services
resell goods
hire alternative equipment
A failure to use a readily available replacement market may increase loss unnecessarily.
However, the substitute must actually be appropriate for the contractual purpose.
Mitigation in consumer scenarios
Mitigation can also arise alongside Consumer Rights Act 2015 remedies.
A consumer may have statutory remedies such as:
repeat performance
price reduction
repair or replacement
rejection
and may also claim common law damages for associated financial losses where appropriate.
AQA's 2025 Kaleb scenario demonstrates that any such additional damages remain subject to mitigation. Kaleb's taxi payment might have been recoverable, but the availability of cheaper suitable public transport could reduce that claim.
Therefore, statutory consumer rights do not mean that every associated expense automatically becomes recoverable damages.
Worked example 1: reasonable replacement
Zara contracts with Aaron to provide a delivery van for £600. Aaron commits a repudiatory breach. Zara immediately hires an equivalent van from another supplier for £750.
Zara has taken a reasonable step to mitigate her loss.
Her additional expense is:
$$£750 - £600 = £150$$
Provided the other rules governing damages are satisfied, the £150 may form part of her recoverable expectation loss.
Worked example 2: unreasonable refusal to replace
Bella contracts with Connor to supply machinery for £4,000. Connor breaches. Equivalent machinery is immediately available for £4,300, but Bella refuses to obtain it because she wants to claim damages instead. Her business then loses £8,000.
Bella's failure to obtain reasonable substitute performance raises a serious mitigation issue.
Had she acted reasonably, the immediate additional cost would have been:
$$£4,300 - £4,000 = £300$$
The court would consider whether some or all of the later £8,000 loss was reasonably avoidable.
Bella cannot deliberately allow losses to increase simply because Connor was originally responsible for the breach.
Worked example 3: taxi versus public transport
Deepa's car remains at Evan's garage because Evan has breached the obligation to complete a service within the required time. Deepa needs to make a journey and spends £90 on a taxi. A suitable bus was available for £8.
The need for alternative transport may have been caused by Evan's breach.
However, mitigation requires consideration of whether Deepa acted reasonably.
Relevant questions include:
Was the bus actually suitable?
Would it have allowed her to arrive when necessary?
Was there any reason a taxi was required?
If the bus was genuinely available and suitable, Deepa may have difficulty recovering the full £90.
This applies the approach identified by AQA in its 2025 Kaleb scenario.
Worked example 4: suitable cheaper alternative unavailable
Farah's supplier breaches immediately before an important event. A cheap replacement service exists but cannot arrive until the day after the event. Farah uses a more expensive supplier which can provide equivalent performance immediately.
Farah should not automatically be criticised for failing to choose the cheapest supplier.
The cheaper option does not satisfy the contractual need.
Using the more expensive immediate replacement may therefore be a reasonable mitigating step.
Worked example 5: anticipatory breach accepted
George tells Haris three weeks before delivery that he will not supply the contracted equipment. His refusal amounts to a repudiatory anticipatory breach. Haris accepts the breach immediately and treats the contract as at an end. Equivalent equipment can now be obtained at a reasonable additional cost.
Mitigation now applies.
Haris should consider the available replacement rather than simply allow avoidable losses to increase until the original delivery date.
This reflects AQA's 2025 statement that the duty to mitigate applies following termination after an anticipatory breach.
Worked example 6: anticipatory breach rejected
Imani tells Jacob two weeks in advance that she will not perform. Jacob refuses to accept the repudiation and continues to expect performance. He spends £400 which he is contractually required to spend in preparation for his own performance.
Jacob may rely on the reasoning used by AQA in the Belle and Charles scenarios.
Because he has chosen to keep the contract subsisting, he can argue that the ordinary duty to mitigate has not yet arisen in the normal way and that he must continue doing what is reasonably necessary to fulfil his own contractual obligations.
Relevant authority is White and Carter (Councils) Ltd v McGregor.
Worked example 7: reasonable action still leaves loss
Keira's supplier commits a repudiatory breach. Keira immediately searches for replacement goods. The cheapest suitable substitute available costs £1,000 more than the original contract.
Keira has mitigated.
She is not expected to find a replacement at the original price if none exists.
The remaining £1,000 difference may therefore form part of her recoverable loss, assuming causation and remoteness are also satisfied.
Worked example 8: claimant increases the loss
Luca's customer breaches a contract to buy goods for £6,000. Luca can immediately resell the goods for £5,800 but refuses because he believes prices will rise. Instead, prices fall and he eventually sells them for £4,500.
Immediate reasonable resale would have produced a shortfall of:
$$£6,000 - £5,800 = £200$$
Luca's eventual shortfall is:
$$£6,000 - £4,500 = £1,500$$
The court would need to consider whether Luca's decision to delay was reasonable.
If not, much of the later loss may have resulted from his failure to mitigate rather than being recoverable from the original buyer.
A step-by-step mitigation method
Step 1: identify the recoverable loss claimed
For example:
£500 replacement cost
£2,000 lost profit
£80 transport expense
Do not simply write "damages".
Step 2: establish causation and remoteness
Before mitigation, make sure the loss:
resulted from the breach
is not too remote
Use Causation and remoteness [Lesson 155. Causation and remoteness].
Step 3: identify possible mitigating action
Ask:
What could the claimant reasonably have done after the breach?
Look for:
a replacement supplier
resale
alternative transport
substitute equipment
reduced expenditure
another reasonable way to prevent loss increasing
Step 4: ask whether the alternative was reasonable
Consider:
cost
suitability
availability
urgency
practical consequences
Avoid assuming that "cheapest" automatically means "reasonable".
Step 5: determine what the claimant actually did
Did they:
take the reasonable alternative?
make another reasonable choice?
do nothing?
choose an unnecessarily expensive option?
Step 6: calculate the avoidable loss
Where figures are provided, compare:
loss after reasonable mitigation
with:
loss actually claimed
The difference may represent avoidable loss which should not be recovered.
Step 7: check for anticipatory breach
If the breach was anticipatory, ask:
Did the claimant accept the repudiation?
Or did they keep the contract subsisting?
This can affect when the mitigation principle becomes relevant.
Step 8: reach a reasoned conclusion
A strong conclusion might say:
Although the £100 transport expense was caused by the breach and is unlikely to be too remote, the claimant could have used suitable public transport costing only £15. If there was no reason why the more expensive option was necessary, the full £100 is unlikely to be recoverable because the claimant failed to take reasonable steps to mitigate the loss.
Or:
The claimant selected the more expensive replacement because the cheaper alternative could not perform until after the required deadline. The decision therefore appears reasonable and is unlikely to amount to a failure to mitigate.
Key Words 🔑
Key word | Student-friendly definition | How it may be used in an exam |
Mitigation | The principle requiring the victim of a breach to take reasonable steps to reduce the loss suffered. | Decide whether the claimant responded reasonably after breach. |
Reasonable steps | Practical actions which could reasonably reduce the financial consequences of breach. | Apply possible alternatives such as substitute goods, services or transport. |
Avoidable loss | Loss which reasonable mitigating action could have prevented. | Explain why part of a damages claim may be excluded. |
Substitute performance | Replacement goods or services obtained because the original contracting party has failed to perform. | Assess whether obtaining a replacement was a reasonable mitigating response. |
White and Carter (Councils) Ltd v McGregor | Authority used by AQA when considering an innocent party who refuses an anticipatory repudiation and continues treating the contract as subsisting. | Explain why the normal mitigation requirement may not yet operate in the usual way after an unaccepted anticipatory breach. |
Hints from the Examiner Reports 💡
Examiner hint: Know the basic rule precisely. AQA has directly tested that the victim of breach must take reasonable steps to reduce the loss suffered.
Examiner hint: Apply mitigation to the actual expense. In the 2025 Kaleb scenario, AQA expected students to consider whether a cheaper form of transport could reasonably have been used instead of a taxi.
Examiner hint: Do not confuse mitigation with remoteness. AQA's 2025 report recognised that Kaleb's taxi claim might fail because the loss was too remote or be restricted because he failed to mitigate. These are separate arguments.
Examiner hint: Anticipatory breach requires extra care. The 2025 report noted that many students identified the anticipatory breach but failed to connect the claimant's election with the consequences for mitigation.
Examiner hint: If the innocent party accepts a repudiatory anticipatory breach and treats the contract as at an end, mitigation applies. The 2025 report expressly identifies the duty after termination following either anticipatory or actual breach.
Examiner hint: If the claimant refuses to accept an anticipatory repudiation and keeps the contract alive, do not automatically criticise further contractual expenditure as a failure to mitigate. AQA's 2023 and 2024 materials use White and Carter (Councils) Ltd v McGregor to support the possibility that the claimant may continue performing their own obligations.
Examiner hint: Explain the legal effect of failure to mitigate. Do not merely write "the claimant should mitigate". State which part of the claimed damages could reasonably have been avoided and therefore should not be recovered.
Common Mistakes ⚠️
Mistake: Saying failure to mitigate means there was no breach
Why this is incorrect: Mitigation concerns the amount of damages, not whether the defendant breached the contract.
How to improve: Establish breach first. Then consider how mitigation affects the recoverable loss.
Mistake: Saying the claimant must prevent all loss
Why this is incorrect: The requirement is to take reasonable steps, not to guarantee a loss-free outcome.
How to improve: Ask whether the claimant's response was reasonable in the circumstances.
Mistake: Assuming the cheapest option must always be chosen
Why this is incorrect: A cheaper option may be unsuitable or unavailable when required.
How to improve: Consider cost together with availability, suitability and urgency.
Mistake: Ignoring an obvious replacement
Why this is incorrect: If suitable replacement goods or services are readily available, allowing avoidable losses to accumulate may amount to a failure to mitigate.
How to improve: Identify the reasonable alternative and compare the loss which would have followed from using it with the loss actually claimed.
Mistake: Automatically awarding every expense caused by breach
Why this is incorrect: An expense can satisfy causation and remoteness but still be restricted by mitigation.
How to improve: For each claimed loss, apply:
causation → remoteness → mitigation
Mistake: Saying a taxi is always a failure to mitigate
Why this is incorrect: AQA's 2025 example depends on whether less expensive transport was both available and suitable.
How to improve: Analyse why the claimant chose the more expensive form of transport.
Mistake: Applying mitigation immediately to every anticipatory breach
Why this is incorrect: Where the innocent party refuses to accept an anticipatory repudiation and keeps the contract subsisting, the ordinary mitigation requirement may not yet operate in the same way.
How to improve: Identify the innocent party's election before applying mitigation.
Mistake: Mentioning White and Carter without explaining why it matters
Why this is incorrect: A case name alone does not show application.
How to improve: Explain the chain:
anticipatory breach → repudiation rejected → contract kept subsisting → claimant continues own performance → ordinary mitigation may not yet apply
Mistake: Treating mitigation as the same thing as remoteness
Why this is incorrect: Remoteness asks whether the type of loss falls within the defendant's contractual responsibility. Mitigation asks whether the claimant could reasonably have reduced that loss.
How to improve: Give the doctrines separate paragraphs in a scenario answer.
Exam-Style Questions ✍️
Question 1
What is meant by mitigation of loss in the law of contract?
[1 mark]
Question 2
Explain the effect of a claimant's failure to mitigate contractual loss.
[3 marks]
Question 3
Explain why mitigation does not require a claimant to prevent every possible financial loss following breach.
[3 marks]
Question 4
Amina contracts with Bilal to hire equipment for £1,500. Bilal commits a repudiatory breach. Equivalent equipment is immediately available for £1,700. Amina hires the replacement.
Apply the principle of mitigation to Amina's actions and calculate her basic additional loss.
[5 marks]
Question 5
Cara's car is retained by Dylan's garage for much longer than agreed. Cara pays £100 for a taxi journey. Suitable public transport would have cost £12.
Explain how mitigation may affect Cara's damages claim.
[5 marks]
Question 6
Elena contracts to buy goods from Faisal for £4,000. Faisal commits a repudiatory breach. Equivalent goods can immediately be obtained elsewhere for £4,300. Elena refuses to buy them and allows her business to suffer £6,000 of losses.
Advise Elena on mitigation.
[5 marks]
Question 7
George tells Haris three weeks before performance is due that he will not carry out his contractual obligations. His refusal amounts to a repudiatory anticipatory breach. Haris immediately accepts the breach and treats the contract as at an end. A suitable substitute contractor is readily available.
Explain the relevance of mitigation to Haris.
[5 marks]
Question 8
Imani tells Jacob two weeks before performance is due that she will not perform a contractual condition. Jacob refuses to accept the repudiation and continues to expect performance. He spends £600 which is reasonably necessary for him to fulfil his own obligations. Imani ultimately fails to perform.
Advise Jacob whether his decision to spend the £600 necessarily amounts to a failure to mitigate.
[10 marks]
Question 9
Keira hires specialist equipment from Luca for £2,000. Luca commits a repudiatory breach. Keira needs the equipment immediately for a commercial project.
Supplier A can provide suitable replacement equipment immediately for £2,400.
Supplier B charges £2,100 but cannot provide the equipment until after the project has finished.
Keira hires from Supplier A and claims the additional £400 from Luca.
Advise whether Keira has failed to mitigate her loss.
[10 marks]
Question 10
Maya contracts with Noah to supply machinery for her business. Noah commits a repudiatory breach. Replacement machinery costing £500 more is immediately available, but Maya refuses to obtain it. Her business consequently loses £8,000 in profit.
Apply the rules on compensatory damages, causation, remoteness and mitigation to Maya's claim.
[10 marks]
Answers and Mark Scheme
Question 1
1 mark for recognising that mitigation requires the victim of contractual breach to take reasonable steps to reduce the loss suffered.
Question 2
Award up to 3 marks for explaining that:
the claimant should take reasonable steps to limit loss
failure to do so does not remove the defendant's original breach
damages may be reduced to exclude loss which reasonable mitigating action could have avoided
Question 3
Award up to 3 marks for explaining that:
mitigation requires reasonable rather than perfect action
the claimant does not have to guarantee that all loss will be prevented
the reasonableness of the available alternative depends upon matters such as suitability, availability, cost and urgency
Question 4
Replacement cost:
$$£1,700$$
Original contract price:
$$£1,500$$
Additional loss:
$$£1,700 - £1,500 = £200$$
Award up to 5 marks for:
identifying Bilal's breach
explaining the requirement to mitigate
recognising that Amina has obtained readily available equivalent equipment
describing this as a reasonable mitigating step
calculating the remaining basic expectation loss as £200
Question 5
Award up to 5 marks for:
recognising that Cara's need for alternative transport may have resulted from Dylan's breach
identifying mitigation as a separate restriction on damages
noting that public transport cost only £12 compared with the £100 taxi
considering whether public transport was genuinely available and suitable
concluding that, if it was suitable and there was no reasonable justification for the taxi, Cara may not recover the full £100 because some of the expense was avoidable
This applies the type of mitigation issue expressly identified by AQA in 2025.
Question 6
Award up to 5 marks for:
identifying the readily available replacement goods
recognising that obtaining them would cost only £300 more than the original contract
explaining that Elena is expected to take reasonable steps to reduce her loss
applying her refusal to obtain the suitable replacement
concluding that she is unlikely simply to recover the entire £6,000 of subsequent business loss if reasonable replacement performance would have prevented it
The reasonable additional replacement cost is:
$$£4,300 - £4,000 = £300$$
The ultimate damages would still depend on all relevant damages rules.
Question 7
Award up to 5 marks for:
identifying the repudiatory anticipatory breach
recognising that Haris accepts the repudiation
explaining that the contract is then treated as at an end
explaining that the normal mitigation principle applies following that termination
concluding that Haris should consider the readily available suitable substitute contractor and cannot simply allow reasonably avoidable losses to accumulate
Question 8
Award up to 10 marks for a reasoned answer including:
Imani's refusal occurs before performance is due and amounts to anticipatory breach
the proposed breach concerns a condition and is repudiatory
Jacob has an election whether to accept the repudiation or keep the contract subsisting
Jacob refuses to accept it
the contract therefore remains subsisting
Jacob continues to expect Imani's performance
Jacob may therefore need to continue fulfilling his own contractual obligations
the £600 is expressly stated to be reasonably necessary for his own performance
White and Carter (Councils) Ltd v McGregor is relevant authority
AQA's 2023 and 2024 materials recognise an argument that the ordinary mitigation obligation does not yet apply in the normal way where the innocent party has maintained the contract before the time for performance
Jacob therefore has a strong argument that spending the £600 does not necessarily amount to a failure to mitigate
if Imani ultimately fails to perform when performance is due, Jacob may seek appropriate damages
A high-level answer will connect the mitigation analysis directly to Jacob's election to keep the contract subsisting rather than merely stating that £600 was spent.
Question 9
Award up to 10 marks for a reasoned application including:
Luca has committed a repudiatory breach
Keira must take reasonable steps to reduce the resulting loss
Supplier B is cheaper
however, Supplier B cannot provide the equipment until after the commercial project
Supplier B therefore does not appear to offer suitable replacement performance
Supplier A can provide equivalent equipment when Keira actually needs it
Keira's choice of Supplier A is therefore likely to be reasonable
mitigation does not require the claimant simply to select the lowest price regardless of suitability
Keira's remaining additional expenditure is: $$£2,400 - £2,000 = £400$$
there is therefore a strong argument that the £400 represents loss remaining after reasonable mitigation rather than loss caused by a failure to mitigate
Question 10
Award up to 10 marks for a structured answer including:
Noah has committed a contractual breach
the purpose of compensatory damages is to place Maya, so far as money can achieve it, in the position proper performance would have produced
the £8,000 profit loss must first be causally connected with Noah's breach
remoteness must then be considered by examining what Noah knew or ought reasonably to have known when contracting about Maya's business use and the risk of profit loss
mitigation provides a further and separate restriction
equivalent machinery was immediately available
obtaining it would have cost only £500 more
the replacement therefore appears to provide a reasonable means of continuing the business
Maya deliberately refused to obtain it
if replacement machinery would have prevented the £8,000 profit loss, much of that loss was reasonably avoidable
Maya cannot simply allow avoidable losses to accumulate and recover them all from Noah
the £500 reasonable replacement cost provides a much stronger starting point for recoverable expectation loss, subject to the remaining damages rules
A high-level response will treat causation, remoteness and mitigation as separate controls, explaining how a loss may satisfy one requirement but still be restricted by another.
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