Construction and EPC Dispute Handbook in Vietnam 2026

Construction and EPC disputes are among the most complex and costly commercial disputes: an EPC (Engineering – Procurement – Construction) project typically runs for years, mobilizes dozens of subcontractors, consultants, and suppliers, with contract values from tens of billions to trillions of dong. When conflict erupts — delays, cost overruns, substandard quality, late payment — the fallout is not only money but stalled projects, half-built works, and broken partnerships.

This handbook systematizes everything employers, general contractors, and contractors need to know to handle construction industry disputes in Vietnam: from the current legal framework (updated for Construction Law 2025, in force from 1 July 2026), a map of typical dispute groups, the ladder of resolution methods from negotiation to arbitration and courts, to practical prevention checklists for each project role.

Table of contents

• 1. Why construction and EPC disputes are the most complex commercial disputes
• 2. Legal framework for construction disputes (updated September 2026)
• 3. Map of 8 typical dispute groups in construction and EPC projects
• 4. Drafting the contract's dispute resolution clause to make it bulletproof
• 5. The 5-tier construction dispute resolution ladder
• 6. Arbitration or court: a practical comparison for construction disputes
• 7. 6 industry-specific legal risks and how to prevent them
• 8. Dispute prevention checklist for employers and contractors
• 9. Notable legal changes
• 10. Frequently asked questions
• 11. Related articles in this handbook
• Need advice on construction and EPC disputes?

1. Why construction and EPC disputes are the most complex commercial disputes

Three features set construction disputes apart from ordinary sale-of-goods or services disputes.

First, high technicality. Disputes revolve around questions only construction experts can answer: are the arising quantities real, were the construction methods per design, who caused the delay. Courts and tribunals both rely on expert appraisal — and the quality of the appraisal often decides the case.

Second, multi-tier interdependence. In the EPC model, the employer signs one contract with the general contractor, who in turn signs dozens of subcontracts for supply and consultancy. A failure at the subcontractor tier can escalate into an employer–general-contractor dispute, while the contracts at each tier have different dispute resolution clauses. "Pushing" liability and costs between tiers is the source of most EPC disputes.

Third, project continuity. Unlike a sales contract that can stop when disputed, a worksite under construction cannot be "frozen" awaiting an award — every idle day costs money and risks damage to half-built works. Construction dispute mechanisms therefore always favor fast, parallel-to-construction methods (like dispute boards and DABs) over waiting for a final award.

2. Legal framework for construction disputes (updated September 2026)

Construction disputes are governed simultaneously by sector-specific construction law and general contract and procedural law. The table below systematizes the core instruments in force as of September 2026:

Critical timing note: Construction Law 2014 expired on 1 July 2026, fully replaced by Construction Law 2025. For contracts signed before that date, check the transitional provisions in Article 95 of Construction Law 2025 and the law in force at signing to determine the governing law for each specific dispute.

3. Map of 8 typical dispute groups in construction and EPC projects

From real-world construction dispute practice in Vietnam, disputes can be classified into 8 groups recurring in most EPC projects:

1. Delays and delay penalties. The most common group. The hot question is always "whose fault": the employer handing over the site late or approving designs slowly; or the contractor mobilizing insufficient labor and equipment. EPC contracts usually set per-day delay penalties with a cap — and the penalized party almost always blames the other side.

2. Arising quantities and contract price adjustments. In lump-sum EPC, the contractor bears quantity risk; but in practice, design changes, unexpected geological conditions, and the employer's additional requests keep generating "arising quantities". Disputes erupt when the parties cannot agree which quantities are genuine extras and which were already included in the lump sum.

3. Late payment and arrears. The contractor has built and had works partially accepted, but the employer pays late — stuck disbursement procedures, quantity disputes, or simply financial difficulty. For the contractor, blocked cash flow means borrowing to keep building — and the borrowing cost often becomes a separate damages claim.

4. Work quality and acceptance. The employer refuses acceptance claiming substandard quality; the contractor insists it built per the approved design. This group almost always requires technical appraisal, and the appraisal result usually forms the tribunal's or court's decisional basis.

5. Suspension and termination. When conflict peaks, one side unilaterally suspends work or declares termination. This is the most dangerous group because it creates a new "legal status quo": who had the right to terminate, was the procedure correct, how are half-finished costs computed — each question can become an independent claim.

6. Defects liability. After handover, defects appear: leaks, cracks, system failures. The employer demands repairs within the warranty period; the contractor blames the employer's wrong operation and maintenance. Warranty disputes drag on because cause assessment needs monitoring time.

7. Disputes with subcontractors and suppliers. The general contractor is penalized for delay by the employer, but the real cause lies with a late-delivering subcontractor; the general contractor wants to "pass down" liability, but the subcontract lacks matching back-to-back terms. This is the inherent weakness of the multi-tier model.

8. Guarantee and insurance disputes. Performance bonds, advance payment guarantees, warranty bonds — when disputes arise, the beneficiary calls on the bank to pay the independent guarantee while the guaranteed party insists the underlying obligation is still contested. The "independence" of bank guarantees from the underlying contract is this group's key legal point.

4. Drafting the contract's dispute resolution clause to make it bulletproof

Article 6 of Decree 37/2015/ND-CP confirms: a valid construction contract is the highest legal basis for dispute resolution. In other words, the quality of the dispute resolution clause largely decides the "playing field" when conflict breaks out. A robust clause needs five elements:

First, a clear multi-tier resolution ladder. Mandate the sequence: direct negotiation within a fixed period (e.g., 30 days) → mediation or a dispute board → arbitration or court. The multi-tier ladder filters out small disputes before costly escalation and gives one side grounds to refuse when the other "jumps tiers".

Second, an in-construction dispute mechanism. For EPC projects, agree from the start to establish a Dispute Board or apply the FIDIC DAB/DAAB model. Its strength is resolving disputes in parallel with construction, avoiding project standstill. Note: from 1 July 2026, Construction Law 2025 (Article 86) officially recognizes "international-practice dispute models" as a lawful method.

Third, a decisive, unambiguous arbitration-or-court choice. The arbitration agreement must meet Law on Commercial Arbitration 54/2010/QH12 conditions: clearly identify the arbitration center (e.g., VIAC), the number of arbitrators, the seat, and the arbitral language. Clauses like "disputes shall be resolved by arbitration or court" are pathological — when disputes arise, the parties will argue another round just about where to sue.

Fourth, governing law and language. For projects with foreign elements (Chinese, Korean, Japanese general contractors are very common in Vietnamese EPC), fix the contract's governing law and which language prevails for bilingual contracts. See the EPC contract disputes with Chinese general contractors for typical real-world lessons.

Fifth, evidence and acceptance provisions. Spell out partial acceptance procedures, deadlines for objecting to acceptance minutes, and how site minutes are made when incidents occur. In construction disputes, the side with a complete, continuous minutes system usually wins — so evidence provisions must be drafted as part of the litigation strategy, not mere administration.

On breach penalties: parties may freely agree penalty levels, except that for works under public investment or PPP projects the penalty may not exceed 12% of the value of the breached contract portion (Article 86(3) of Construction Law 2025). Apart from penalties, the breaching party must also compensate damages as agreed — the two are independent.

5. The 5-tier construction dispute resolution ladder

Vietnamese law (Article 86 of Construction Law 2025, Article 45 of Decree 37/2015/ND-CP) and international practice converge on a 5-tier ladder. Climbing it properly not only saves costs but is an obligation where the contract agreed a multi-tier sequence.

Tier 1 — Direct negotiation. The two sides talk directly. It sounds simple, yet this tier resolves the most disputes in practice, because both sides want the project to continue. The secret of effective construction negotiation: prepare complete technical-evidence data before sitting down, and always have a clear BATNA if negotiation fails.

Tier 2 — Mediation and dispute boards. If direct negotiation deadlocks, the parties may use a mediator or dispute board. Under Article 45(2) of Decree 37/2015/ND-CP, a dispute board comprises one or more experts agreed by the parties; within 28 days of receiving the settlement conclusion, a disagreeing party may object and move to arbitration/court — past 28 days without objection, the conclusion becomes binding. Dispute board costs are included in the contract price, split equally unless otherwise agreed.

Tier 3 — FIDIC DAB/DAAB. For FIDIC-based contracts (very common in foreign-element EPC), the Dispute Adjudication Board (DAB — FIDIC 1999) or Dispute Avoidance/Adjudication Board (DAAB — FIDIC 2017) is the "on-site" mechanism: the board visits the site periodically and issues temporarily binding decisions so the project does not stall; only a disagreeing party takes it to arbitration. From 1 July 2026, Construction Law 2025 gives this model a clear legal corridor in Vietnam.

Tier 4 — Commercial arbitration. When the above tiers fail, arbitration is the choice of most high-value EPC disputes, especially with foreign elements: confidentiality, industry-expert arbitrators, final awards, and cross-border enforceability. New note: for public investment and PPP projects, when arbitration is chosen, domestic arbitration institutions are prioritized (Article 86(5)(b) of Construction Law 2025).

Tier 5 — Courts. The last resort or the default where the contract has no arbitration agreement. Court advantages: strong interim urgent measures (seizure, account freezing, transfer bans), statutory court fees (Resolution 326/2016/UBTVQH14), and an appeal mechanism to correct errors. Downsides: lengthy timelines, public trials, and judges not always deeply versed in construction technology.

6. Arbitration or court: a practical comparison for construction disputes

On court costs, two practical notes. First, the plaintiff must pay advance first-instance civil court fees before the court accepts the case; for valued cases the advance equals 50% of the court fee the court projects on the disputed value (Article 7 of Resolution 326/2016/UBTVQH14) — for hundred-billion-dong EPC disputes this is a non-trivial sum to budget. Second, if the parties successfully mediate in court, each bears only 50% of court fees — one more economic reason to take negotiation and mediation seriously before "fighting to the end". The commercial dispute court litigation procedure is covered separately in the in-depth guide.

On limitation: the limitation for asking a court to resolve a contract dispute is 3 years from the date the claimant knew or should have known its lawful rights and interests were infringed (Article 429 of the 2015 Civil Code). For long projects, each payment tranche and each item may have its own limitation start date — do not wait to "consolidate everything" before suing, lest early-arising amounts become time-barred.

7. 6 industry-specific legal risks and how to prevent them

Risk 1 — Vague contract terms on variations and price adjustments. Symptom: a lump-sum EPC contract that never defines "variations" and has no written variation approval process. Consequence: every payment round is an argument. Prevention: define variations, a variation request form, approval deadlines, and variation pricing principles from the start.

Risk 2 — Lax acceptance and missing minutes. Symptom: works finished but never partially accepted, site minutes sketchy or unsigned by competent authority. Consequence: in dispute, performed quantities cannot be proven. Prevention: partial acceptance with clear objection deadlines; site diaries and site minutes made and countersigned periodically.

Risk 3 — Failing to trigger the claim mechanism in time. Symptom: triggering events (late site handover, design changes) occur but no claim notice is sent within the contractual/FIDIC deadline (the customary 28 days). Consequence: losing the right to extension and cost compensation. Prevention: build an internal claim process — who spots the event, who drafts the notice, to whom, within how long.

Risk 4 — Guarantees called while the underlying obligation is still contested. Symptom: the employer calls the performance bond as soon as a breach is suspected. Prevention: when contracting, negotiate the guarantee's payment conditions (first-demand vs conditional guarantee); when wrongly called, promptly seek interim urgent measures from the court.

Risk 5 — Administrative violations in construction activity. From 26 August 2026, administrative sanctions in construction follow Decree 339/2026/ND-CP (replacing Decree 16/2022/ND-CP). Violations such as building without permits, deviating from approved designs, or breaching labor safety rules bring not only fines but possible work suspension — and an administrative suspension can turn into "delay" in the contract dispute. Prevention: fully comply with commencement conditions, permits, and safety; keep the project's legal file parallel to its technical file.

Risk 6 — Labor disputes and worksite accidents. EPC sites mobilize thousands of workers; labor accidents or wage disputes with subcontractors can stall the project and implicate the employer in some cases. Prevention: require contractors to carry mandatory insurance and periodically check subcontractors' labor compliance.

8. Dispute prevention checklist for employers and contractors

For employers:

• Vet the general contractor's capacity and finances before signing; require full performance and advance payment guarantees.
• Set clear design-approval and variation procedures with specific response deadlines — avoid "hanging" approvals then blaming the contractor for delays.
• Conduct partial acceptances on time; object in writing within the contractual deadline if quality falls short.
• Prepare capital and disbursement plans matching the contract's payment schedule.

For general contractors and contractors:

• Read penalty, damages, and termination clauses carefully before signing; negotiate penalty caps and price adjustment mechanisms matching real risks.
• Establish an internal claim process: every triggering event is notified in writing on time.
• Sign subcontracts on "back-to-back" principles: subcontractor obligations, penalties, and dispute mechanisms compatible with the main contract.
• Maintain a complete evidence system: site diaries, acceptance minutes, site minutes, correspondence — the decisive "weapon" when disputes arise. (See the detailed checklist when the satellite article is added.)

9. Notable legal changes

Construction Law 2025 (135/2025/QH15) — in force 1 July 2026. This is the biggest change to the construction legal framework in a decade. For disputes, three novelties stand out: (i) Article 86 for the first time recognizes "international-practice dispute models" (FIDIC-style DAB/DAAB) as a lawful method alongside negotiation, mediation, arbitration, and courts; (ii) priority for domestic arbitration institutions in public investment and PPP projects; (iii) the 12% contractual penalty cap for public investment and PPP projects. Businesses with ongoing contracts should review dispute resolution clauses to use the new corridor.

Decree 339/2026/ND-CP — in force 26 August 2026. The new decree on administrative sanctions in construction, replacing Decree 16/2022/ND-CP. Businesses must update to avoid administrative violations — because, as analyzed, an administrative work-suspension decision can easily become "delay" in a contract dispute.

10. Frequently asked questions

For construction and EPC disputes, should we choose arbitration or court?

No universal answer. Arbitration suits projects with foreign elements, confidentiality needs, and awards enforceable cross-border under the New York Convention; courts suit cases needing strong interim urgent measures or small-value disputes. New from 1 July 2026: for public investment and PPP projects, Construction Law 2025 (Article 86) gives priority to domestic arbitration institutions when the parties choose arbitration.

Is a Dispute Board mandatory in construction contracts?

Not mandatory under Vietnamese law, but well worth considering for high-value EPC projects. Decree 37/2015/ND-CP (Article 45) recognizes this mechanism: the parties may agree to establish a dispute board of experts; the board's settlement conclusion is binding if no party objects within 28 days. For FIDIC-based contracts, the DAB/DAAB plays the equivalent role.

What is the limitation period for construction contract disputes?

Three years from the date the claimant knew or should have known that its lawful rights and interests were infringed (Article 429 of the 2015 Civil Code). For multi-year projects, the limitation start dates for each payment tranche and each item may differ — review early rather than waiting to consolidate all debts.

What is the maximum contractual penalty for construction contracts?

The law sets no general cap: penalties are as agreed by the parties. Only for works under public investment or PPP projects is the contractual penalty capped at 12% of the value of the breached contract portion (Article 86(3) of Construction Law 2025). Apart from penalties, the breaching party must also compensate damages as agreed.

How does the new Construction Law 2025 affect ongoing disputes?

Construction Law 2025 took effect on 1 July 2026, replacing the 2014 Construction Law. For contracts signed before that date, check the transitional provisions (Article 95) and the law in force at signing to determine the governing law. Notable: Article 86 expressly recognizes international-practice dispute models alongside negotiation, mediation, arbitration, and courts.

What should a contractor do when the employer pays late?

Follow the sequence: review the contract on payment conditions and late-payment interest; send a written payment demand with a fixed deadline; charge late-payment interest as agreed (not exceeding 20% per year) or at the commonly applied 10% per year absent agreement (Articles 357 and 468 of the 2015 Civil Code); activate the dispute board or DAB mechanism if the contract has one; litigate in arbitration or court only as a last resort. In parallel, preserve all acceptance records and site minutes as evidence.

11. Related articles in this handbook

• Construction and EPC contract disputes in Vietnam: prevention and resolution — the in-depth guide to preventing and handling each construction contract dispute type.
• EPC and construction contracts: FIDIC and Vietnamese law — analyzing the FIDIC-based EPC contract framework under Vietnamese law.
• EPC contract disputes with Chinese general contractors: practical lessons — case study of typical lessons from EPC disputes with Chinese elements.
• Drafting an international-standard arbitration clause — guidance on drafting arbitration agreements that avoid pathological clauses.
• Commercial dispute litigation in Vietnamese courts: the A-to-Z procedure — the full litigation procedure when disputes must go to court.

Need advice on construction and EPC disputes?

Every construction project has its own "medical history" — contract terms, construction status, the evidence system, and inter-party relations decide the right handling strategy. FLAT Law Firm's lawyers have experience handling domestic and foreign-element construction and EPC disputes, from negotiation and mediation to arbitration and courts.

Contact hotline 0988424851 for a handling plan suited to your project.

References

• Construction Law No. 135/2025/QH15 dated 10/12/2025 (in force 1/7/2026).
• Decree No. 37/2015/ND-CP dated 22/4/2015 detailing construction contracts (amended by Decree 50/2021/ND-CP).
• Law on Commercial Arbitration No. 54/2010/QH12 dated 17/6/2010 (consolidated text 60/VBHN-VPQH 2025).
• Civil Code No. 91/2015/QH13; Civil Procedure Code No. 92/2015/QH13.
• Resolution No. 326/2016/UBTVQH14 dated 30/12/2016 on court fees and charges.
• Decree No. 339/2026/ND-CP on administrative sanctions in construction (in force 26/8/2026).