Contractors’ Claims, Remedies and Reliefs

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The international construction market is highly competitive. Following the financial crisis of 2008 and the steep decline in the prices of oil and gas that followed, with the exception of some government infrastructure projects, in particular in emerging markets, there has been a dramatic decrease in construction work worldwide, in particular for major contractors who specialise in large and complex projects.

Employers with scarcer resources are awarding projects on tight budgets and employer friendly contractual terms, often to contractors who undervalue their bids in order to win the project, resulting in cash flow issues, delays and substandard work. In recent years, this increasingly common recipe has led to a very contentious international construction market and numerous construction arbitrations.

Contractors are required to complete projects on time, at the required quality and at the agreed cost. Their ability to do that can be affected by a number of factors outside their control and properly drafted construction contracts, tailored to a project’s specific jurisdictional and logistical risks, provide relief to contractors when such events occur.

This chapter discusses the claims, remedies and reliefs available to contractors in major construction projects, in light of some of the current challenges faced by contractors in the international construction industry, by reference to market practice, and one of the most commonly used suites of standard form construction contracts, published by the International Federation of Consulting Engineers (FIDIC).

First, the discussion is about the circumstances in which claims for extensions of time arise, and the procedure to be followed when making such claims. Second, the chapter sets out the conditions that give rise to claims for loss and expense, and the usual requirements that contractors must satisfy for their claim to be successful. Third is a look at the circumstances in which variations, payment and force majeure claims can give rise to extensions of time, loss and expense, and termination. Fourth is a brief discussion of the other circumstances that give rise to a contractor’s right to terminate the contract, related procedural requirements and consequences. Finally, the chapter provides tips for contractors when appointing and working with expert witnesses in disputes arising from contractors’ claims.

Extensions of time

In most projects, contractors are required to complete the project by a set date. Construction projects are often time-critical and delays to completion of a given project can result in significant monetary losses to the employer. For example, if the completion of a power plant or an oil refinery is delayed, it will have a direct effect on the offtake agreement and the project revenue stream, affecting the ability of the employer to repay the lenders. Accordingly, as is further discussed in the chapter titled ‘Employers’ Claims and Remedies’, construction contracts usually contain liquidated or general damages provisions under which the contractor is liable for delays to the project.[2]

Large and lengthy projects will generally be divided into milestones that the contractor must achieve by set milestone dates. In these circumstances, contractors are likely also to be liable for liquidated or general damages if they fail to complete the milestones by the milestone dates.

A multitude of events can delay a project, some of which are outside a contractor’s control. Accordingly, contractors cannot always be held responsible for delays and liable for the resulting losses. Depending on the governing law and the provisions of the underlying contract, a contractor may be entitled to claim an extension of time when such events arise.

Events that can give rise to an extension of time include:

  • acts caused by the employer or one of its representatives (including other contractors employed by the employer);
  • events outside the control of either party and that are the employer’s responsibility under the contract, such as force majeure events, material or goods shortages, or delays caused by the authorities; and
  • variations to the scope of works.[3]

Typically, construction contracts entitle contractors to an extension of time if they can prove that the event caused delay to an activity that is on the project’s or particular milestone’s critical path (the critical path of a project or a milestone is the longest path of logically connected activities such that the sum of the individual durations of each activity equals the overall duration of the project or milestone).

Contractors will usually be required to provide notice to the employer, or its representative, of the delaying event. The clock will start ticking either when the delaying event arises, or more often when the contractor becomes aware, or should have become aware, of the delaying event.[4]

In construction contracts, compliance with such contractual notices will usually be a condition precedent to any claim for an extension of time.[5] These contractual notice requirements are often referred to as guillotine provisions and are enforced strictly in common law jurisdictions, in accordance with one of the underlying principles of contract law, pacta sunt servanda or freedom of contract.

Some civil law jurisdictions take a hostile view towards condition precedent clauses and time bars. Contractors should, therefore, always check the legal position in their chosen jurisdiction.

In addition to the notice requirements, the contractor will be required to follow the procedure set out in the underlying contract in order to claim an extension of time. Although this might vary depending on the contract, it will generally involve submitting detailed particulars and supporting contemporaneous records evidencing the entitlement to an extension of time.[6] Contractors should negotiate the costs arising from such exercise with the employer when discussing clauses of this nature.

To produce particulars and records that satisfy the contractual and evidentiary hurdle for claiming an extension of time, contractors must ensure they have a good planning team.

Such particulars and records will generally be submitted to the employer’s representative, who must, in consultation with the parties, make a fair determination of the contractor’s claim.[7]

Contractors and employers should keep these records in the event either of them disagrees with the employer representative’s determination and the entitlement to an extension of time arises as an issue in future arbitration proceedings. During proceedings, such records will be required by the contractor to establish the existence of the alleged delaying event and by its appointed programming experts to provide opinion evidence on the effect that each alleged delaying event had on the contractor’s ability to complete the work.

Employers may, by their conduct, waive some of the contractual condition precedents to claiming an extension of time with regard to one or more contractor claims. If such a waiver is established, the employer may be estopped from denying an extension of time on the basis that the contractor failed to comply with those contractual condition precedents.

In common law jurisdictions, this principle is referred to as estoppel by conduct. It arises if (1) a party by its conduct (2) led the other to believe (3) it had waived or relaxed compliance with an obligation, and (4) the other party acted in accordance with that conduct (5) to its detriment.

In both civil law and common law jurisdictions, contracts can be concluded orally or by conduct and, accordingly, the employer’s conduct leading to the contractor’s belief it had relaxed the procedural condition precedents may constitute a variation to the underlying contract, having a similar effect as estoppel by conduct.

The ability to conclude an oral contract or a contract by conduct is limited if the underlying contract contains entire agreement, no waiver or no variations unless in writing provisions, in particular in common law jurisdictions where such provisions would be enforced strictly. In civil law jurisdictions, they would be enforced but may be balanced against overriding considerations of fairness and equity, which could have the same effect as estoppel.

Loss and expense

Claims for loss and expense cover all types of financial claims by contractors in construction disputes.

Claims for loss and expense arise when contractors can show that:

  • they suffered loss because of an employer breach of contract; or
  • they have an entitlement to additional money under the contract.

To successfully claim for loss and expense for breach of contract, a contractor needs to prove that (1) there was an obligation, (2) which was breached by the employer or its representatives, (3) therefore causing monetary loss to the contractor, and (4) that loss is not too remote.

Under English law, losses will not be too remote if:

  • a reasonable man would have realised losses of the same kind[8] were a not unlikely consequence of the breach[9] (referred to as direct losses); or
  • those losses may reasonably be supposed to have been in the contemplation of the parties at the time they entered into the contract[10] (referred to as indirect or consequential losses).

The test for remoteness is very similar in other common law jurisdictions. In civil law jurisdictions, however, claimants are usually only entitled to those damages reasonably foreseeable at the time of execution, except in cases of gross negligence or fraud. For example, Article 263 of the Qatari Civil Code sets out the test for remoteness under Qatari law. Article 263(2) states:

the compensation shall cover damages incurred by the obligee, including loss of profit, provided that such damages or loss of profit are a natural consequence of the obligor’s failure or delay to perform the obligation. Damages shall be deemed a natural result if the creditor could not avoid it by reasonable efforts.

Article 263(3) goes on to state:

if the source of the obligation is the contract, the debtor would not be obliged to pay compensation to the creditor if he the debtor did not commit fraud or gross mistake, except for compensation for damage that was foreseeable or within the contemplation of the parties at the time of the conclusion of the contract.

In other words, the loss will not be too remote if:

  • it flows from the breach of contract; and
  • in circumstances where the debtor has not committed fraud or gross mistake, and also was ‘within the contemplation of the parties’ at the conclusion of the contract.

The ability to recover certain losses may also be limited by provisions of the contract. For instance, construction contracts often limit the parties’ ability to recover indirect losses,[11] except in cases of fraud, deliberate default or reckless misconduct.

Events that may entitle contractors to additional money under the contract include acts of prevention by the employer or the employer’s representatives, variations and neutral events for which the employer is responsible under the contract.

Contractors will usually be required to follow the same procedure as for claims for an extension of time, and the same contractual condition precedents will apply.

The most common heads of claim are prolongation, disruption and acceleration. When a project is delayed because of an event for which the employer is responsible, the contractor is entitled to an extension of time, as discussed above, as well as any losses arising from the delay. These losses are referred to as prolongation costs.

Prolongation costs can include site and office overheads, financing charges arising from money borrowed to fund the project and loss of profit. To successfully claim for prolongation costs, contractors need to provide detailed particulars and evidence that each of the claimed costs were caused by employer delay. The contractor’s ability to successfully claim the prolongation costs will also be subject to the rules of remoteness under the governing law of the contract.

In complex projects, when contractors experience difficulties proving the causal link between each alleged delay event, the actual delay to the project and the claimed prolongation costs, they are often tempted to combine all the alleged delay events into a global claim, instead of breaking down the delay and prolongation costs and linking them to specific delay events. Because of the lack of causal link, global claims seldom succeed, in particular when heard before an experienced and robust arbitral tribunal.

Claims for general disruption arise from the assumption that contractors arrange the activities required to complete a project in an efficient sequence. On that assumption, any event that affects the sequence of the work can lead to inefficient use of plant and manpower, which in turn would increase the costs of completing the project. When the employer is responsible for such events, a contractor is entitled to recover those costs.

Claims for disruption are generally difficult to prove. Contractors must show that the additional costs are caused by events for which the employer is responsible, instead of the contractor’s inefficient practices.

The most commonly used method to prove disruption costs is the measured mile method, where the contractor compares the efficiency in the disrupted section of the work with the efficiency in an identical unaffected section. It will only work, however, when the contractor is able to identify an identical unaffected section of the work.

Acceleration claims are also fairly common in construction arbitrations. They can arise:

  • when the employer instructs the contractor to complete the work within a shorter period than originally required under the contract (referred to as express acceleration); or
  • when, because of one or more events for which the employer is responsible, the contractor must perform more work or delayed work within the same period (referred to as implied acceleration).

The contractual procedure to instruct acceleration and claim for costs arising from acceleration will generally be the same as for variation claims.

Claims for implied acceleration are rare and difficult to prove. They cannot arise in parallel to extension of time and loss and expense claims made because of the same event. They are generally only successful in circumstances where a contractor has incurred costs when successfully mitigating all the delay caused by an event for which the employer is responsible.


Employers will often want to be able to make changes in a project. Those changes may arise from potential buyer or end user requirements, changes in technology or aesthetics concerns.

Properly drafted construction contracts will provide a sophisticated mechanism allowing:

  • employers to make changes to the scope of the work after the contract is executed; and
  • contractors to be awarded an extension of time and payment for costs arising from those changes.

To claim an extension of time or payment for additional costs, the contractor must follow the procedure set out in the contract. Upon request from the employer, a contractor will generally be required to submit a proposal containing any additional time and costs claimed, together with all supporting documentation.[12]

As for other claims for time and costs, the time and costs effect of a variation, if not agreed between the parties, will usually be determined by the employer’s representative[13] and be subject to any contractual condition precedents, such as notice requirements. In addition to time-related costs, contractors are usually entitled to any additional costs relating to labour and material that arise from the variation, subject to any contractual or legal limitations on liability.

The contractor should, of course, ensure that the supporting documentation includes all documents required contractually and from an evidentiary perspective to prove their entitlement to additional time and costs.

Force majeure

Events outside the parties’ control may arise during a project, affecting the contractor’s ability to perform its contractual duties. A force majeure clause excuses non-performance by a contractor of its contractual obligations when impossibility results from a cause stated in the contract. Such causes are typically defined as an event or act that:

  • is beyond the reasonable control of the contractor;
  • was not reasonably foreseeable at the time of entering the contract;
  • could not have been avoided;
  • is not attributable to the employer; and
  • prevents the contractor from performing its obligations under the contract.[14]

Often, force majeure clauses may also specify a descriptive list of events, such as war, terrorism, civil unrest and severe adverse weather conditions, which will be deemed to be force majeure events if they also comply with the conditions above.[15] Force majeure clauses may also exclude particular events from the scope of force majeure so as to allocate liability in advance for such events.

To successfully claim force majeure, the contractor must prove that a force majeure event exists and that it is preventing performance,[16] temporarily or permanently. What constitutes ‘prevention’ in this context will depend on the wording but also on the governing law of the contract. For instance, under English law, the prevention must be legal or physical. A contractor will not be able to claim that it was ‘prevented’ from performing the contract just because the cost of performance has increased above what was originally anticipated.[17]

As with other claims, the contractor must also comply with contractual condition precedents, such as notice provisions. Again, failure to comply with such a contractual condition precedent may or may not have a debarring effect.

If successful, a contractor may be entitled to a graduated range of remedies, including extension of time, loss and expense, suspension of performance, termination of the contract and consequential provisions.

A contractor will typically be entitled to an extension of time for delays arising from being ‘prevented’ from performing its obligations under the contract. However, the contractor will generally be under the obligation to minimise any such delay.

Although some standard form contracts, such as FIDIC,[18] provide contractors with the ability to also claim for loss and expense (time-related costs, as well as costs of remedying the works because of loss or damage caused by a force majeure event) in some circumstances, in practice, construction contracts generally allocate cost-related risks of force majeure events to contractors.

In the event of a prolonged force majeure event preventing the execution of substantially all the work, contractors may be entitled to terminate the contract.[19] If so, the force majeure clause will set out the length of force majeure before termination becomes available and the payments that must be made if the contract is terminated. Very often, the approach to termination is the same as with termination for convenience. However, any ‘termination payment’ may either exclude or limit greatly the amounts that may be paid or the amount of loss of profit for the balance of the contract.


Non-payment or late payment claims by contractors are also very common in construction projects. In the current market, contractors often price their bids on a very tight margin and non-payment or late payment can quickly eat into that margin, in particular when a contractor has financing obligations.

The effect on the contractor’s and subcontractors’ cash flow can strongly hinder their performance and the contractor’s ability to perform its obligations on time and at the planned cost, if at all.

Construction contracts usually require employers to make payments to contractors periodically, in accordance with an agreed schedule of payments.[20] Before each payment is made, contractors must submit contractually compliant interim payment applications, showing in detail the amount to which they consider themselves to be entitled, together with supporting documentation evidencing the progress of the work against which payment is claimed.[21]

The employer must pay all duly justified payments, subject to any deductions it is entitled to make under the provisions of the contract[22] (such as deductions for defective work, for instance). If the employer fails to pay the contractor by the prescribed deadlines without any valid justification, the contractor will typically be entitled to financing charges incurred because of such delay.[23] Any prolonged failure may entitle the contractor to suspend work and, in extreme cases, terminate the contract.

To suspend the work or terminate the contract for non-payment, the contractor must comply with the procedure set out in the contract, including any notice requirements. The suspension and termination provisions of the contract will generally set out the length of notice before suspension and termination become available.[24]

Contractors will generally be entitled to an extension of time and associated time-related costs for delays arising from a suspension of the work, subject to the requirements set out, above, in the ‘Extensions of time’ and ‘Loss and expense’ sections.


Contractors generally have relatively limited termination rights in construction contracts. In addition to the circumstances set out, above, in the ‘Force majeure’ and ‘Payment’ sections, contractors are typically entitled to terminate a contract:

  • for a failure by the employer to submit reasonable evidence of financial arrangements demonstrating ability to pay the contract price;
  • if the employer substantially fails to perform, or materially breaches, its obligations under the contract;
  • for a failure by the employer to enter into a contract agreement in accordance with the contract or the prohibition on assignment;
  • if the employer engages in corrupt or fraudulent practice in relation to the contract;
  • for a prolonged suspension of the work instructed by the employer or the employer’s representative; and
  • for employer insolvency.[25]

Provided a prescribed reason arises, and the contractual procedure is followed, a contractor will be entitled to terminate the contract.

The consequences of termination will be prescribed by the contract and will generally include, on the one hand, payment of sums due and return of performance security to the contractor and, on the other hand, handing over to the employer all plant, materials and documents that are paid for, and removal of all other goods from site.[26]

As is further discussed in the chapter titled ‘Employers’ Claims and Remedies’, employers have generally more extensive termination rights. Although a valid termination for default may have disastrous consequences for contractors, a wrongful termination may entitle contractors to payment for all the profit they would have made under the contract but for the wrongful termination and the cost of demobilisation.

Appointing and working with expert witnesses in disputes arising from contractors’ claims

Construction projects involve a wide range of technical trades and expertise. Deciding claims arising from construction projects, therefore, requires evidence from experts in those aspects of the project from which the dispute arises. In addition to the traditional disciplines in which expert evidence is generally required in international commercial arbitrations, such as local law or quantum, construction arbitrations often require programming experts and experts in technical disciplines such as architecture, mechanical engineering, electrical engineering, structural engineering and so on, to decide extension of time, variation or defects claims.

Therefore, construction arbitrations arising from major projects are inherently expert heavy and will often stand and fall on expert evidence.

The key factors that make a good expert generally come under three umbrellas: (1) the expert’s eminence and experience in their area of expertise; (2) their credibility; and (3) soft skills that are transferable to the role of an expert witness (such as good oral presentation, organisation or ability to meet strict deadlines).

Professional expert witnesses typically have stronger soft skills than individuals who practise their expertise for a living. One can see the attraction in appointing a professional expert as they are likely to have good oral presentation skills, understand the arbitral process and legal jargon and will generally need less supervision.

Although soft skills are important, it is the weight the arbitral tribunal gives to an expert’s evidence that will be critical to the tribunal’s decision on the issue on which the expert gives evidence. When deciding between two conflicting experts’ opinions, a tribunal is likely to give significantly more weight to the opinion of an ‘actual’ expert with extensive day-to-day experience and credentials in the issue on which the opinion is given than to the opinion of a professional expert with limited or no actual experience of the issue.

Experts are expected to be independent in international arbitrations. This requirement is reflected in the International Bar Association Rules on the Taking of Evidence in International Arbitration (Article 5.2(c)). A lack of independence is highly likely to come to light during the arbitration.

It is imperative that expert witnesses are properly briefed at the outset, to ensure the expert’s report (or reports) is focused, exhaustive, authoritative, cost-effective and submitted on time.

The instructions to the expert should contain all the relevant background information, the nature of the expertise required, the purpose of the expert’s report, a description of the matters to be investigated and of the issues to be addressed, the statements of case (if any), the relevant witness statements (if any), those documents that form part of disclosure and witness statements that are relevant to the report, an outline programme for the completion and delivery of each stage of the expert’s work, the dates of any hearings, the deadlines for the exchange of experts’ reports and any other relevant deadlines. The instructions should also set out the expert’s duties, in particular independence and owing an overriding duty to the tribunal.

A critical point to remember is that instructions to experts are not privileged and often ordered to be disclosed. They should never contain material that would be embarrassing or otherwise undermine the expert’s independence. It is helpful to the expert’s and client’s credibility to set out the instructions fully in the expert’s report or reports.

Another potential pitfall to avoid is to ask an expert (other than legal experts, obviously) to give a view on legal issues or issues that are not within the expert’s expertise. The expert must focus exclusively on the factual or technical issues within his or her expertise that underpin the legal case.

In addition to issuing clear instructions from the start, the expert must work closely with the project team and legal team and keep a dialogue going throughout the arbitration. There should be a comprehensive ‘teach-in’ at an early stage by the project team; all the documentation and information requested by the experts should be provided to the expert as quickly and efficiently as possible (subject to lawyer review for relevance or privilege); and there must be regular communication and discussion on key issues and progress. In addition, contractors should consider with their lawyers and experts whether there is a need for further information and factual evidence or other expert evidence (e.g., specific engineering input), and provide it to the expert. Finally, the contractor’s lawyers must check the draft report for completeness and relevance to issues.

A good expert report should include a full curriculum vitae of the expert (as discussed above, anything hidden will be found out), the instructions in full, an executive summary, details of the individuals to whom the work has been delegated (and a statement that, despite delegation, the expert has checked, understood and endorses all work undertaken by others to prepare the report), identify the sources of all the information being relied on, identify the methods followed, identify all the assumptions made where information is not available, address the specific issues identified in the instructions directly and clearly, and set out the expert’s conclusion directly and clearly.

Whether a contractor succeeds in a construction arbitration will often depend on the quality, thoroughness and independence of its expert evidence. Selecting the right experts and managing them efficiently is therefore critical.


[1] James Bremen is a partner at Quinn Emanuel Urquhart & Sullivan UK LLP. The information in this chapter was accurate as at September 2019.

[2] See, for example, International Federation of Consulting Engineers (FIDIC). Yellow Book (Conditions of Contract for Plant and Design-Build), Clause 8.8.

[3] See, for example, id., Clause 8.5.

[4] See, for example, FIDIC Silver Book (Conditions of Contract for EPC/Turnkey Projects), Clause 20.2.

[5] See, for example, id., Clause 20.2.

[6] See, for example, ibid.

[7] See, for example, id., Clause 3.5.

[8] Overseas Tankship (UK) Ltd v. Morts Dock & Engineering (The Wagon Mound, No. 1) [1961] AC 388.

[9] C Czarnikow Ltd v. Koufos (The Heron II) [1969] 1 AC 350.

[10] Hadley v. Baxendale (1854) 9 Exch 341.

[11] See, for example, FIDIC Silver Book, Clause 1.14.

[12] See, for example, id., Clause 13.3.

[13] See, for example, id., Clauses 3.5 and 13.3.

[14] See, for example, FIDIC Red Book (Conditions of Contract for Construction), Clause 18.1.

[15] See, for example, id., Clause 18.1.

[16] See, for example, id., Clause 18.1.

[17] Fairclough Dodd & Jones Ltd v. JH Vantol Ltd [1956] 3 All ER 921.

[18] See, for example, FIDIC Red Book, Clause 18.4.

[19] See, for example, id., Clause 18.5.

[20] See, for example, FIDIC Silver Book, Clause 14.4.

[21] See, for example, ib., Clause 14.3.

[22] See, for example, id., Clause 14.6.

[23] See, for example, id., Clause 14.8.

[24] See, for example, id., Clauses 16.1 and 16.2.

[25] See, for example, id., Clause 16.2.

[26] See, for example, id., Clauses 16.3 and 16.4.

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