Since 1 January 2025, large multinational groups operating in the UAE have faced a new 15% minimum tax floor under the country's Domestic Minimum Top-up Tax — the UAE's implementation of the OECD's Pillar Two framework. Here's exactly who's in scope, and how it sits alongside standard 9% Corporate Tax.
"Pillar Two" refers to the OECD/G20 Inclusive Framework's global minimum tax initiative, designed to ensure large multinational enterprise (MNE) groups pay an effective tax rate of at least 15% on their profits in every jurisdiction they operate in. Because the UAE's standard Corporate Tax rate of 9% under Federal Decree-Law No. 47 of 2022 sits below that 15% floor, the question was always what happens to large multinational groups operating here once Pillar Two took effect globally. Federal Decree-Law No. 60 of 2023 amended the Corporate Tax Law to make room for a top-up mechanism, and Cabinet Decision No. 142 of 2024 — issued following a March 2024 public consultation — then set out the actual Domestic Minimum Top-up Tax (DMTT) rules, effective for fiscal years starting on or after 1 January 2025.
Who Is Actually In Scope
DMTT applies only to constituent entities of Multinational Enterprise Groups with consolidated annual revenue of EUR 750 million or more (roughly AED 3.15 billion) in at least 2 of the 4 fiscal years immediately preceding the tested year — the same threshold that already disqualifies large MNE members from Small Business Relief eligibility. The large majority of UAE businesses, including most free zone companies, SMEs, and even sizeable purely domestic groups, sit well below this threshold and are entirely unaffected. DMTT is aimed specifically at the UAE operations of very large global groups, not UAE businesses generally.
The Core Mechanic: Topping Up to 15%
For each jurisdiction an in-scope group operates in, including the UAE, Pillar Two rules calculate a jurisdictional Effective Tax Rate (ETR) — broadly, the group's covered taxes in that jurisdiction divided by its GloBE income there, using the OECD's specific GloBE calculation rules rather than ordinary accounting or Corporate Tax figures. If the UAE ETR for the group works out below 15%, a top-up tax applies to bring the effective rate up to the 15% floor on the relevant low-taxed profit. Because the UAE now collects this top-up domestically through its own DMTT, rather than leaving another country's tax authority to collect it under the OECD's Income Inclusion Rule (IIR) or Undertaxed Profits Rule (UTPR), the revenue stays in the UAE instead of migrating to a parent company's home jurisdiction.
A UAE subsidiary of a global manufacturing group with EUR 2 billion in consolidated group revenue reports UAE profits that, once GloBE adjustments are applied, produce a UAE jurisdictional effective tax rate of 11% for a given fiscal year. Since 11% sits below the 15% Pillar Two floor, a top-up tax applies to close the 4-percentage-point gap on the relevant low-taxed profit — collected in the UAE itself under the DMTT rather than by the group's parent-company jurisdiction. A separate UAE subsidiary belonging to a EUR 400 million group, well under the EUR 750 million threshold, has no DMTT exposure at all, regardless of what its effective tax rate works out to.
Why the UAE Introduced Its Own Top-Up Tax
Under the OECD's Pillar Two model rules, if a jurisdiction doesn't itself apply a Qualified Domestic Minimum Top-up Tax to bring low-taxed local profit up to 15%, another jurisdiction in the group's structure — typically the ultimate parent's home country — is entitled to collect that top-up instead, under the IIR or UTPR. By introducing its own DMTT, aligned with the OECD's GloBE Model Rules, Commentary and Administrative Guidance, the UAE keeps that tax revenue at home rather than ceding the collection right to a foreign tax authority, while giving in-scope groups a single UAE-administered calculation instead of exposure to multiple overlapping foreign top-up regimes.
Transitional Relief: The CbCR Safe Harbour
A Transitional Country-by-Country Reporting (CbCR) Safe Harbour lets qualifying MNE groups reduce their UAE top-up tax to zero if simplified conditions based on existing CbCR data are met, for fiscal years starting before 1 January 2027 and not ending after 1 July 2028 — giving in-scope groups a multi-year runway before the full GloBE calculation mechanics need to bite in practice.
- DMTT filing is due within 15 months of the relevant fiscal year-end, extended to 18 months for the very first year a group falls in scope
- No penalties apply for reasonable, good-faith compliance efforts through 30 June 2028
- The safe harbour is transitional, not permanent — in-scope groups still need to build toward full GloBE-compliant calculations before it expires
DMTT Sits Alongside Standard 9% Corporate Tax, Not Instead of It
DMTT does not replace ordinary UAE Corporate Tax — an in-scope group still files and pays standard 9% Corporate Tax under Federal Decree-Law No. 47 of 2022 on its UAE taxable income in the normal way. DMTT only applies as an additional top-up charge, and only on the specific low-taxed profit that causes the group's UAE jurisdictional GloBE ETR to fall under 15%. A group can be an entirely ordinary Corporate Tax payer in every other respect and still owe a modest top-up once the separate GloBE-specific adjustments and income measures are applied to its UAE results.
What In-Scope Groups Should Be Doing Now
- Confirm MNE group revenue status against the EUR 750 million threshold across the relevant 4-year test window
- Map UAE constituent entities' GloBE income and covered taxes separately from standard Corporate Tax figures — the two calculations use different adjustments
- Check Transitional CbCR Safe Harbour eligibility for the current transition years before assuming a full GloBE calculation is required immediately
- Plan for the 15/18-month DMTT filing timeline as a separate compliance track from the standard Corporate Tax return deadline
How Corcess Helps
We assess MNE group threshold status, Transitional CbCR Safe Harbour eligibility, and DMTT compliance planning alongside standard Corporate Tax filings — for the specific subset of large multinational clients this actually applies to, since the overwhelming majority of UAE businesses will never cross the EUR 750 million threshold and can safely treat DMTT as not applicable to them.