Quick answer: An FDI company entitled to CIT incentives does not enjoy them “automatically” — it must complete a first-time incentive registration with the tax authority, filed with or right after the first filing period generating incentivized income. The dossier comprises the incentive registration letter, evidence of meeting the conditions (investment certificate, investment policy approval, sectoral qualification certificates…), and an explanation of how incentivized income is identified. The most common mistake is qualifying but forgetting to register, only to discover during an inspection that years of incentives are lost forever.
Applicable legal bases
The framework below is in force as of the writing date (20/10/2026) and directly governs this article:
- Corporate Income Tax Law 67/2025/QH15 (effective 01/10/2025, applicable from tax year 2025) — incentive principles: beneficiaries, conditions, procedures.
- Decree 236/2025/ND-CP (effective 15/10/2025) — implementing CIT Law 67/2025/QH15, including incentive registration procedures.
- Tax Administration Law 108/2025/QH15 (effective 01/7/2026, replacing Law 38/2019/QH14) — taxpayer declaration and tax registration duties.
- Investment Law 143/2025/QH15 (effective 01/3/2026) — the investment registration certificate as the basis for identifying incentivized projects.
In-depth analysis
The crux of first-time registration lies in Vietnam’s “self-assess, self-bear-responsibility” tax principle. Unlike pre-approval models elsewhere, Vietnamese companies assess their own eligibility, register with the tax authority and start applying — the authority verifies correctness later, during inspections. The upside is speed with no approval wait; the downside is retroactive disqualification for all enjoyed years plus reassessment and penalties if self-assessment was wrong. First registration is therefore not a formality — it is when the company locks in its legal position for the entire incentive period.
Timing attaches to the first year generating incentivized income, not the incorporation year or the investment certificate year. A company incorporated in 2024, losing money for two years, first earning incentivized taxable income in 2026, registers in 2026 — also the first year of the exemption period. The common confusion is registering at incorporation and “parking” it until profits arrive — procedurally acceptable but it muddles exemption-period tracking and causes miscounted exemption years at finalization. Best practice: prepare the full dossier early but file and apply in the correct first incentivized-income year.
The dossier must prove two things: the project qualifies for incentives and the company meets the conditions at registration. The first group includes the investment registration certificate (recording objectives, scale, location), the investment policy approval (if applicable), and sectoral licenses evidencing the incentivized business line (e.g., science-technology enterprise certificate, hi-tech project certification). The second is the company’s own explanation: mapping each incentive condition against project reality, the method for segregating incentivized from ordinary income, and a commitment to maintain conditions. The more detailed the file, the less inspection risk years later — and it must all be retained for presentation many years on, since incentive periods run a decade.
Four components of the first-time incentive dossier
- Incentive registration letter: addressed to the directly managing tax authority, stating the project, the incentive type registered (preferential rate, exemption, reduction) and the start year.
- Project legal documents: investment registration certificate, investment policy approval (if any), sectoral licenses evidencing the incentivized business line.
- Eligibility explanation: mapping each incentive condition against project reality; the method for segregating incentivized and ordinary income.
- Condition-maintenance commitment: commitment to keep meeting conditions throughout the incentive period and legal responsibility for the registration’s accuracy.
Common risks and how to prevent them
- Qualifying but forgetting to register: review incentive eligibility as soon as the project operates — missed prior years are usually unrecoverable.
- Registering the wrong start year: tie registration to the first incentivized-income year, not incorporation — miscounting shifts the whole exemption timeline.
- Thin files without explanation: invest in a detailed condition-by-condition explanation — it is the shield at inspections years later.
- Not retaining the dossier: incentive periods run 10–15 years; keep the registration file throughout plus the inspection limitation period — digitize and keep multiple copies.
Frequently asked questions
1. Must we wait for tax authority approval before applying incentives?
No — companies self-assess, register and apply; the authority checks later. But wrong self-assessment means retroactive disqualification, so be certain before applying.
2. Does an expansion project of an operating company register separately?
Yes — a qualifying expansion investment is an independent incentive project, requiring separate registration and segregated income accounting.
3. Registered but loss-making that year — is an exemption year wasted?
No — the exemption period counts from the first year with taxable income from incentivized operations. Loss years do not count, but reporting duties remain.
4. What if the project relocates after registration?
Incentives attach to location — relocation can change eligibility (the new site may not qualify). Reassess and notify the tax authority before moving.
Key takeaway for investors
First-time incentive registration locks in the legal position for a decade of incentives. Do it thoroughly once: complete dossier, detailed explanation, correct start year — and keep it safe.
This article has been quality-reviewed by the FLAW AI Legal Council This content is legal reference only and does not replace counsel for a specific case.