EPC Contract Disputes: Common Legal Issues Businesses Should Address Early

Where do EPC disputes commonly arise?

1- Scope of work
One of the most common areas of disagreement is what the contractor was actually required to deliver.
If specifications, drawings, exclusions and responsibilities are not clearly documented, disagreements can arise over whether additional work is a variation or part of the original scope.

2. Project delays
Delay disputes can become complicated when several factors contribute to the delay.For example:

• • delayed site handover;
• • design changes;
• • delayed approvals;
• • shortage of materials;
• • changes instructed during execution; or
• • delays attributable to subcontractors.

The contractual allocation of responsibility becomes critical.

3.Variations and additional work
Additional work may be requested during execution. The difficulty often arises when the parties disagree about the price, approval or contractual treatment of that work.
A verbal instruction can become a difficult issue months later if it was never properly documented.
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4. Payment disputes

• • Cash flow is critical in large projects.
• • Disputes may concern:
• • milestone payments;
• • certification;
• • retention amounts;
• • escalation;
• • deductions;
• • set-offs; or
• • unpaid invoices.

What appears to be a simple payment dispute can sometimes develop into a much larger contractual claim.

5. Liquidated damages
When a project is delayed, questions often arise regarding contractual delay damages.

• • Was there actually a delay?
• • Who caused it?
• • Was an extension of time available?
• • Were contractual notices issued correctly?

These questions should ideally be addressed while the project is continuing, rather than after termination.

6.Performance guarantees and termination
Invocation of a bank guarantee or termination of an EPC contract can have immediate commercial consequences.
Once such action is contemplated, the contractual provisions and the surrounding project records need careful examination.

7. Documentation
In a major EPC dispute, the contract is only part of the story.
Emails, meeting minutes, drawings, variation orders, invoices, notices, site records and project correspondence can become important in establishing what actually happened.
Good documentation is therefore not merely an administrative exercise.
It can become evidence.
What happens when the dispute reaches arbitration?
By then, the parties are often dealing with several interconnected issues rather than one isolated disagreement.
A dispute may involve:
Delay + variation + payment + damages + termination + counterclaims
This is why EPC disputes require an understanding of both the contract and the underlying project.
The better approach
Legal involvement does not have to begin when an arbitration notice arrives.
For businesses handling large EPC and infrastructure projects, legal support can be useful at different stages:
Contract negotiation → Project execution → Contract management → Claims → Dispute resolution → Arbitration
The earlier a contractual issue is identified and properly documented, the easier it may be to understand the company's position when a dispute eventually arises.
For EPC businesses, one simple question is worth asking regularly:
“If this issue becomes a dispute six months from now, will our documents clearly show what happened?”
That question alone can change how a project team manages its contracts.