QDMTT reaches only battery plants inside very large groups — and it taxes the incentive effect, not the project
Vietnam’s domestic minimum top-up tax (QDMTT) is anchored in Resolution 107/2023/QH15 and Decree 236/2025/ND-CP and applies to multinational groups with consolidated revenue of EUR 750 million or more in at least two of the four preceding years. An EV battery plant in Vietnam is in scope only if its ultimate parent crosses that threshold; a plant owned by a smaller group, or by a standalone investor, owes no QDMTT top-up even though it keeps its normal corporate income tax incentives. One boundary must be stated clearly: Vietnam applies QDMTT and an income inclusion rule for Vietnamese groups investing abroad; the UTPR has not been enacted into Vietnamese domestic law and must not be described as currently applied in Vietnam.
The core mechanism is a jurisdictional effective tax rate (ETR): if incentives pull the group’s Vietnam ETR below 15%, the gap up to 15% is collected on excess profit, after deducting the substance-based income exclusion computed on tangible assets and payroll costs. A battery plant carries very large tangible assets and a big workforce, so its substance carve-out is materially higher than that of a pure trading company — the detail that makes the battery scenario different from a services scenario.
Committed incentives are not voided — but QDMTT shrinks their economic value
The direct answer to the most common concern: QDMTT does not cancel the incentive certificate, does not withdraw the investment registration, and does not strip the project of its incentives under the Law on Corporate Income Tax No. 67/2025/QH15. The project still enjoys its exemption and reduction schedule exactly as granted; what changes is that after tax is computed under the incentives, the group must run a second layer: a top-up if the blended Vietnam ETR falls below 15%. In other words, the incentive survives on paper and still shelters profit within the substance carve-out, but low-taxed excess profit is topped up to the 15% floor. The commitment is therefore not ‘voided’ — its economic value is reduced at group level, by an amount that depends on each year’s profit structure.
The practical consequence for investment negotiations: a battery investor gains little from mechanically bargaining for more holiday years, because extra exemption years add no value once the ETR is already below the floor. Negotiation weight should shift to support that does not depress the ETR (infrastructure, land, training support) and to structuring the project to maximise the substance carve-out. The parallel semiconductor QDMTT scenario is analysed in FDI-LC-4017; the full land-to-CIT incentive package for the battery plant itself is set out in FDI-LC-4067 in this same batch.
What the battery investor should prepare: jurisdictional ETR data, GloBE files and a separate compliance calendar
First, establish the group’s position: whether consolidated revenue crosses EUR 750 million, whether the parent jurisdiction already applies an IIR, and whether the top-up will be collected in Vietnam under QDMTT or at parent level. Second, build the data system: a GloBE ETR computation needs accounting data adjusted under its own standard, separate from the ordinary CIT return; a battery plant should set up dedicated coding for tangible assets and payroll from its first operating year so the substance carve-out is maximised lawfully. Third, re-read every commitment in the investment file — tax stability clauses in arrangements with state agencies do not block a QDMTT liability, because the top-up is a statutory charge on the group’s Vietnam presence as a whole.
Finally, do not merge the QDMTT calendar with the transfer pricing calendar: the two regimes have separate returns, deadlines and data sets. Investors should keep one consolidated compliance calendar with two clearly separated obligation lines and a single data owner, so GloBE figures, transfer pricing figures and financial statements never diverge — inconsistent data sets are the biggest challenge risk in the first audit cycles of the new regime.
Frequently Asked Questions
How is an EV battery plant affected by the minimum tax?
Through the effective tax rate mechanism: if the parent group’s consolidated revenue is EUR 750 million or more and incentives pull the Vietnam effective rate below 15%, the difference up to 15% on excess profit is collected as top-up tax under Resolution 107/2023/QH15 and Decree 236/2025/ND-CP. A battery plant’s large tangible assets and workforce generate a substance-based carve-out, so its top-up is lower than for an asset-light project.
Will committed incentives be nullified?
No. The incentives remain in force under the Law on Corporate Income Tax No. 67/2025/QH15 and the exemption/reduction schedule is not withdrawn. QDMTT is an additional layer computed after the incentives are applied: it reduces the economic value of the incentives at group level where the effective rate falls below 15%, but it does not void them. Profit sheltered by the substance carve-out keeps the benefit of the low rate.
What should battery investors prepare?
Three things: (1) confirm whether the group is in scope at the EUR 750 million threshold and whether the top-up falls in Vietnam under QDMTT or at the parent under an IIR; (2) build GloBE effective-rate data, coding tangible assets and payroll separately from year one to use the substance carve-out; (3) shift negotiation focus from extra holiday years to infrastructure, land and training support, and run a separate QDMTT compliance calendar — do not merge it with transfer pricing documentation.
This article has been quality-reviewed by the FLAW AI Legal Council
