Can a contractor stop work because interim payments are overdue?

A contractor may have the right to suspend work under a FIDIC construction contract when the employer fails to pay amounts due, but suspension must follow the operative contractual conditions, notice procedure and governing law. Sub-Clause 16.1 of the relevant FIDIC Red, Yellow and Silver forms addresses contractor suspension in defined circumstances. A contractor cannot assume it may abandon a project immediately after one disputed invoice. Equally, an employer cannot treat certified-payment obligations as optional simply because it has raised unrelated counterclaims. The result depends on certificates, payment due dates, notices, cure periods and contractual amendments.

Identify the precise nonpayment

Prepare a ledger distinguishing submitted payment applications, certified sums, disputed variations, retention and paid amounts.

An invoice that the contractor has merely issued may not be equivalent to an amount legally certified or otherwise payable. Determine which sum has become due under the contract.

Clause 14 payment mechanism

FIDIC contracts ordinarily contain procedures for interim statements, payment certificates and payment deadlines under Clause 14.

The applicable edition and Particular Conditions should be read before asserting an employer missed the legal due date. A public body may have an agreed payment period from certification.

Suspension right under Sub-Clause 16.1

Sub-Clause 16.1 addresses circumstances in which a contractor may reduce the rate of work or suspend it, subject to contract terms.

The triggering events, notice period and required procedure must be followed. Contract amendments can alter rights. A general reference to "FIDIC" cannot replace exact clause analysis.

Written notice

The contractor should issue a formal notice to the contractually specified recipient, identifying the unpaid amount, relevant certificate and the contractual provision relied upon.

Notice should use the prescribed communication method. An informal WhatsApp message to an unrelated project officer may not satisfy a formal suspension condition.

Cure period and timing

Some FIDIC provisions require advance notice allowing the employer to correct the problem before suspension.

Calculate the relevant days from actual service and the edition's wording. Stopping work before the contractual period expires can jeopardise the contractor's own legal position.

Partial versus complete suspension

Depending on the form, a contractor may be entitled to reduce progress rather than stop all activities.

The notice should specify the intended action and ensure appropriate safety and protection measures. Suspension need not mean leaving the site without security.

Employer disputed deductions

The employer may allege delay damages, defective work or other counterclaims.

These allegations must be analysed under contractual setoff, determination and claims provisions. Not every asserted counterclaim automatically eliminates a certified payment obligation.

Retention and certification disputes

A dispute about release of retention can involve Sub-Clause 14.9 and certificates under Clauses 10 and 11.

The contractor should not automatically treat the entire retention fund as an overdue certified interim payment. Establish when release legally became due.

Financing cost for late payment

Sub-Clause 14.8 addresses delayed payment financing charges in relevant forms.

The contractor should calculate entitlement according to the agreed formula and currency. A claim for payment interest is analytically separate from suspension and may require additional contractual steps.

Extension of time consequences

A lawful suspension because of employer nonpayment may delay completion.

The contractor should record effects on the critical path and follow contractual claims provisions for time and cost. The mere fact that operations stopped does not automatically prove every subsequent delay was caused by nonpayment.

Demobilisation and remobilisation

Suspension can involve worker release, storage, protective work, plant idle time and later remobilisation.

Preserve quotations, payroll records, equipment logs and actual costs. Do not estimate losses without a documented basis.

Duty to protect works

Even during lawful suspension, the contractor may remain subject to safety, custody and preservation obligations under the contract.

Hazardous electrical systems, traffic works and partially constructed structures require particular attention. A contractor should not expose people or property to avoidable danger to put financial pressure on the employer.

When payment resumes

The operative contract may require the contractor to resume normal progress within a defined period after the employer remedies the triggering failure.

The parties should document actual receipt of funds and remobilisation instructions. The contractor should avoid using a previous default as unlimited authority to stay away after lawful cure.

Termination is different

Sub-Clause 16.2 addresses contractor termination under defined conditions. Suspension and termination are distinct and may have different notices and consequences.

A party intending to terminate should not rely on a suspension letter alone unless it satisfies the separate contractual requirements.

Public works and statutory limits

Government contracts may involve public finance requirements and approved payment mechanisms. These do not automatically eliminate valid contractual obligations.

The contractor should nevertheless assess the particular project's statutory and procurement framework before taking steps that materially affect public infrastructure.

A certified milestone example

A contractor installs and commissions a traffic monitoring system, obtains a payment certificate and remains unpaid beyond the due date.

The contractor should send the prescribed notice and allow the contractually required period before a lawful suspension. It should preserve the invoice, certificate and bank records.

A disputed variation example

A contractor demands payment for an uncertified oral variation and immediately halts all works after the employer disputes the amount.

Whether suspension is lawful may depend on whether the variation became a payable obligation and whether the contractual notices were followed. The contractor cannot rely on the mere existence of an invoice.

Dispute resolution

Unresolved payment and suspension disputes may require determination and DAAB referral under the relevant FIDIC procedures.

The contractor should protect its monetary claim while avoiding a breach that gives the employer separate rights. An arbitration filing alone may not determine whether suspension was valid at the time.

Claim preparation

Prepare a timeline showing application, certification, due date, reminders, formal notice, cure expiry, suspension, costs and resumption.

This gives the decision-maker a complete documentary basis. Communications should identify each disputed sum separately.

Opinion and recommended course

FIDIC can permit contractor suspension for defined payment failures, but the right is procedural and conditional. Identify amounts actually due, comply with Sub-Clause 16.1 and notice requirements, protect the works and preserve claims for time and cost. Do not treat every disputed bill as an immediate right to stop performance.

Principal authorities: FIDIC Red, Yellow and Silver Books, Clause 14, Sub-Clauses 14.8, 16.1 and 16.2 where applicable; Sub-Clause 20.2 and dispute resolution provisions; Particular Conditions; Contract Act, 1872 and applicable Pakistani arbitration law.