Tax Incentive Dispute Vietnam: A Case Study

Note: the scenario below is a simulated typical case compiled from practice, fully anonymized. It does not describe any real client or matter.

Contents

• 1. Background (Simulated)
• 2. Typical Dispute Points
• 3. Resolution Roadmap
• 4. File Preservation — Where Cases Are Won or Lost
• 5. Lessons
• 6. Frequently Asked Questions
• When to Involve Counsel
• References

This tax incentive dispute Vietnam case study shows how a foreign-invested manufacturer can face tens of billions of VND in back tax simply for failing to keep incentivized and non-incentivized income in separate books.

1. Background (Simulated)

Company S. — a 100% foreign-owned manufacturer in an industrial park in central Vietnam — held an IRC granting CIT incentives: 2 years' exemption followed by 4 years of 50% reduction. After 3 years of operation, the provincial tax inspection team concluded the company failed the incentive conditions: part of its revenue came from trading (buy-and-resell) outside the incentivized sector, without separate accounting. Result: 3 years' back CIT + penalties + late-payment interest, totaling tens of billions of VND.

On timing, Company S.'s incentives ran from the first year it earned taxable income: two full exemption years, then four years at 50% reduction. The inspection came in year four — the first year of the 50%-reduction phase — when the authority reviewed the year-three finalization and spotted a surging share of trading revenue, with no separation of the two income streams in the books. This is the classic pattern: disputes rarely erupt in year one; they surface once the authority has multi-year data to compare.

2. Typical Dispute Points

Point 1 — Scope of incentivized income. The company argued all activities fell within the registered project; the authority carved out trading income. The crux: was the project's described scope broad enough, and were the two income streams separately booked?

The authority typically applies a "which income, which incentive" principle: income from non-incentivized activities bears the standard rate, with shared costs apportioned by revenue ratio. The company can counter with the project scope stated in its IRC and the sectoral incentive guidance — but that argument only holds if the original project file described operations broadly and truthfully, and the books separated the two income streams from day one. In practice, many companies lose this point not because the law is against them, but because their records cannot prove what they assert.

Point 2 — Maintaining conditions. Some incentives attach to ongoing conditions (disbursed capital, headcount, exports). Missing them in any year can disqualify that year — companies need yearly compliance files.

The sting is the per-year test: meeting conditions this year does not cure last year's failure. A company needs a standalone file for every year of the incentive period — tax finalizations, labor reports, capital disbursement confirmations — so that any year under question can be answered immediately, instead of digging through archives.

Point 3 — Project changes. Company S. expanded its factory and added business lines but was late amending its IRC. The authority treated the expansion as a new, non-incentivized project.

Legally, an unregistered expansion can be treated as a new investment project that does not automatically "ride along" on the original incentives. Practically, a late IRC amendment also signals weak compliance, inviting closer scrutiny of everything else. The safe rule: reflect every change in scale, location or business lines in the IRC before the changed portion starts generating revenue.

Point 4 — Penalties and late-payment interest. Once under-declaration is established, the company faces a 20% penalty on the underpaid tax (Art. 44(3)(b)) plus late-payment interest of 0.03% per day on the overdue amount (Art. 16) — under the 2025 Law on Tax Administration (108/2025/QH15), in force from 01/7/2026 (detailed guidance in Circular 89/2026/TT-BTC and Decree 252/2026/ND-CP). Over several back-tax years, these two items can inflate the total liability materially. Dispute strategy should therefore target not only "whether back tax is due" but also penalty mitigation — for instance by showing a genuine difference in legal interpretation rather than tax evasion.

Point 5 — Which legal text applies when. Tax incentives are tested against the text in force when the income arose, not the latest text. When a new tax law is enacted (such as the CIT Law passed by the National Assembly in 2025), the company must determine whether its existing incentives fall under transitional provisions or the new conditions. Disputes often ignite in this transition zone — where the authority and the company apply two different texts to the same tax year. This is the greyest area of tax incentive dispute Vietnam cases in years when tax laws change.

3. Resolution Roadmap

Step 1 — Work with the inspection team. Upon receiving the draft findings, the company may submit written explanations and additional evidence. Many disputes narrow at this stage with complete files.

Step 2 — Complaint. Against an adverse formal decision, file a first-instance complaint with the issuing authority or its direct superior. Deadline: 90 days from receipt (Article 9, Law on Complaints 2011). The dossier needs: the complaint letter, the challenged decision, all evidence of meeting incentive conditions, and legal arguments rebutting each inspection finding.

Statutory resolution periods are typically 30 days from acceptance for a first-instance complaint (45 days for complex cases), and 45 days for a second-instance complaint (60 days if complex). In practice, prepare the file as if it will go the distance: every argument in the complaint may later become litigation grounds, so consistency across stages is critical — do not let the complaint's reasoning contradict what will be put before the court.

Step 3 — Administrative litigation. If the complaint fails or the company chooses court, sue in the competent People's Court. Limitation: 01 year (Article 116, Law on Administrative Procedures 2015). A prior complaint is not mandatory, but both deadlines must be calendared so neither route lapses.

On jurisdiction, administrative decisions of a provincial tax authority are typically heard by the provincial People's Court. Pay the court-fee advance and prepare a complete filing from the outset, because the 01-year limitation runs from receipt of the decision — not from the complaint outcome. A common mistake is "waiting for the complaint to finish before thinking about court," only to find weeks left on the litigation clock after the second-instance complaint decision arrives.

On suspension of enforcement: the law allows enforcement to be temporarily suspended during complaint/litigation where enforcement would cause hard-to-remedy consequences — but this is an exception, not automatic. Cash-constrained companies should plan tax payment and guarantees early rather than assuming "a complaint buys a payment holiday."

Key note: complaint/litigation does not automatically suspend enforcement — the assessed tax is generally still payable unless suspended as prescribed. Plan cash flow proactively.

4. File Preservation — Where Cases Are Won or Lost

• [ ] IRC and all amendments, investment policy approvals
• [ ] Incentive confirmation documents from competent authorities (if any)
• [ ] Yearly evidence of incentive conditions: capital, headcount, revenue, exports
• [ ] Separate books for incentivized vs non-incentivized income
• [ ] Tax returns and financial statements for disputed years
• [ ] Working minutes with inspection teams; correspondence

Two points are often missed. First, electronic records (e-invoices, e-ledgers, emails with the tax authority) carry the same evidentiary value as paper if integrity is assured — store them systematically and do not lose them in an accounting-software migration. Second, working minutes with the inspection team must be written and signed by both sides; oral exchanges that go unrecorded are nearly worthless in a dispute. The minimum 10-year retention for accounting records means incentive files must be kept at least that long — do not destroy them early only to discover you need them.

5. Lessons

1. Design the project right from the start: describe the scope in the IRC broadly but truthfully; separate income streams from year one.
2. Amend the IRC promptly on every expansion or new business line.
3. Review incentive conditions annually as part of internal compliance — not only when inspectors arrive.
4. React fast to draft findings: the 90-day complaint window passes quickly.
5. Annual incentive health-check: put incentive-condition reviews on a fixed compliance calendar (e.g. alongside annual tax finalization), with a named owner. Spotting a risky year early leaves room to adjust or provision for tax.
6. Paper-trail management decisions: expansions, new business lines and business-model changes should be minuted internally (meeting records, decisions of the authorized person) and reflected promptly in the IRC. In a dispute, "we meant to do it" is worth far less than "we did it and have the file."

6. Frequently Asked Questions

1. When can CIT incentives be revoked? Typical grounds: the incentive conditions were never met (wrong location or sector); project changes removed eligibility without reporting; incentivized and non-incentivized income were not separately accounted; or the authority and the company read the incentive documents differently. These are the classic triggers of a tax incentive dispute Vietnam file.

2. What is the deadline for complaining against a tax decision? Under Article 9 of the 2011 Law on Complaints, the complaint period is 90 days from receipt of (or learning of) the administrative decision, e.g. a back-tax assessment or penalty decision. A late complaint without justified reasons may be rejected.

3. What is the time limit for suing a tax decision in court? Under Article 116 of the 2015 Law on Administrative Procedures, the limitation is 01 year from receipt of the administrative decision; if a complaint was filed, 01 year from receipt of the complaint-resolution decision (first or second instance) or from expiry of the resolution deadline without a response.

4. Complain first or sue directly? The law does not require a complaint before an administrative lawsuit (except special cases). Complaints are usually faster and cheaper, suited to clear-cut legal grounds; litigation suits complex, high-value disputes or failed complaints. Either way, calendar both deadlines so neither route lapses.

5. What files must be preserved in a tax incentive dispute? The IRC and all amendments; incentive approval documents (if any); yearly evidence of meeting incentive conditions (capital, headcount, revenue, location); separate books for incentivized income; tax returns and financial statements for the disputed years; and all working minutes with the inspection team.

6. Must the assessed tax be paid during complaint/litigation? As a rule, a complaint does not suspend enforcement — the company must still pay the assessed tax unless enforcement is suspended as prescribed. Plan cash flow accordingly and consider requesting suspension during the proceedings.

When to Involve Counsel

High-value tax disputes need counsel from the inspection stage — to build arguments, preserve evidence and choose correctly between complaint and litigation. Early intervention is always cheaper than late rescue.

FLAT LAW FIRM supports companies in tax disputes, from inspection explanations to complaints and administrative litigation. Call our hotline 0988424851.

References

1. National Assembly (2011), Law on Complaints, Law No. 02/2011/QH13, Article 9 (90-day period).
2. National Assembly (2015), Law on Administrative Procedures, Law No. 93/2015/QH13, Article 116 (01-year limitation).
3. National Assembly (2025), Law on Tax Administration, Law No. 108/2025/QH15 (in force 01/7/2026, replacing Law 38/2019/QH14).
4. Ministry of Finance (2026), Circular No. 89/2026/TT-BTC guiding the Law on Tax Administration and Decree 252/2026/ND-CP (in force 01/7/2026).