A UK group with a manufacturing subsidiary in Viet Nam may in 2026 face top-up tax at both ends — the UK’s domestic Pillar Two top-up and Viet Nam’s Qualified Domestic Minimum Top-up Tax (QDMTT). Misunderstanding the ordering can mean double payment or a missed liability.
1. The Pillar Two framework: a 15% global minimum
The OECD/G20 Pillar Two framework sets a 15% global minimum corporate tax for multinational groups with consolidated revenue of EUR 750 million or more. The UK has implemented it: a multinational top-up tax and a domestic top-up tax on UK profits. Viet Nam applies a QDMTT under Resolution 107/2023/QH15 (effective 01/01/2024): the shortfall to 15% on profits arising in Viet Nam is collected in Viet Nam first.
2. Ordering: Viet Nam collects first, the UK takes the remainder
Pillar Two’s logic prioritises the jurisdiction where profits arise: Viet Nam’s QDMTT applies first — top-up computed on Vietnamese entities whose effective rate is below 15%. Then the UK rules (multinational top-up tax) collect only any remaining difference on the group’s profits elsewhere, crediting taxes already paid — including QDMTT paid in Viet Nam. Practical consequence: Vietnamese CIT incentives granted to a UK group’s FDI project (holidays, reductions) may be partly “neutralised” by top-up tax — the investment-incentive case must be recomputed on the post-QDMTT effective rate.
3. What UK groups must do in Viet Nam
(a) Check whether the group meets the EUR 750 million threshold — many mid-sized UK groups assume they are out of scope but exceed it on global consolidation; (b) compute each Vietnamese entity’s effective tax rate under GloBE standards, not ordinary CIT computation; (c) reassess the real value of enjoyed tax incentives and stabilisation clauses in the Investment Registration Certificate; (d) prepare QDMTT filings under Vietnamese rules while reconciling with UK Pillar Two reporting to avoid mismatched filings. All computations need a tax adviser’s review — GloBE is a technically complex standard where one wrong definition skews the whole liability.
Conclusion
For UK groups in Viet Nam, the question is no longer “do we get tax incentives” but “how much incentive survives the global minimum tax”. Answering that is how the group correctly prices its Viet Nam project in global planning.
Frequently Asked Questions
What is the global minimum tax threshold?
Multinational groups with consolidated revenue of EUR 750 million or more, under the OECD/G20 Pillar Two framework at a 15% minimum rate.
Under what instrument does Viet Nam collect minimum top-up tax?
Resolution 107/2023/QH15, effective 01/01/2024: the shortfall to 15% on profits arising in Viet Nam is collected in Viet Nam first (QDMTT).
Can a UK group face double top-up taxation?
Not if the ordering is right: Viet Nam’s QDMTT applies first; UK rules collect only any remaining difference, crediting tax already paid in Viet Nam.
What remains of Vietnamese CIT incentives under Pillar Two?
Holidays and reductions may be partly neutralised by top-up tax. Businesses must recompute the real value of incentives on the post-QDMTT effective rate, not the headline rate.
This article has been quality-reviewed by the FLAW AI Legal Council