UAE Domestic Minimum Top-up Tax: Registration and Filing Deadlines

Why “Pillar Two is for giants” is the wrong assumption

The OECD’s Pillar Two framework was built around the world’s largest multinational groups. That is true at the global level. But the UAE’s domestic version of the rule — the Domestic Minimum Top-up Tax, or DMTT — does not only catch the parent company sitting in another country. It reaches the UAE branch, subsidiary or holding entity of any group that meets the revenue threshold, regardless of how small that specific UAE entity is.

A UAE free zone company with three staff can be “in scope” purely because its global parent group turns over more than EUR 750 million a year. That is the gap we are seeing: finance teams at the UAE entity level assume the obligation sits with head office abroad, when in fact the UAE constituent entity has its own registration and filing duty here, enforced by the Federal Tax Authority.

This has not been a priority for many businesses because the rules only became operative for financial years starting on or after 1 January 2025, and registration functionality on EmaraTax has only recently gone live. The deadlines, however, are now real and running.

What this means for you: if your UAE entity belongs to a group with global revenue anywhere near EUR 750 million, do not wait for a letter from the FTA. Establish scope now.

Who is actually in scope

The Ministry of Finance introduced the DMTT alongside the UAE’s wider corporate tax regime, confirming in its February 2025 announcement that the tax applies to multinational enterprise groups within the scope of the OECD’s Global Anti-Base Erosion (GloBE) rules. In practice, that means:

• The group’s consolidated annual revenue, per its ultimate parent’s consolidated financial statements, must be EUR 750 million or more in at least two of the four financial years immediately before the tested year.
• The UAE entity — however small locally — counts as a “constituent entity” of that group and has its own registration obligation.
• The top-up tax only becomes payable where the group’s effective tax rate on its UAE profits falls below 15%. Groups already taxed at or above 15% in the UAE may still have to register and file, even if no top-up tax is ultimately due.

What this means for you: scope is tested at group level, not UAE-entity level. A profitable, well-run UAE subsidiary can still be caught simply by belonging to a large global parent.

Registration deadlines on EmaraTax

The Federal Tax Authority has switched on top-up tax registration through its EmaraTax portal, the same system used for corporate tax and VAT registrations. The standard rule requires an in-scope entity to apply for registration within seven months of the end of its first in-scope financial year.

A transitional concession softens this for groups whose first in-scope year ended before 30 April 2026: those entities have until 30 November 2026 to register, regardless of when their seven-month window would otherwise have closed. For a UAE entity with a financial year ending 31 December 2025, that means the registration deadline is 30 November 2026.

What this means for you: if your financial year follows the calendar year, you have a hard date — 30 November 2026 — to get registration done, not a vague “sometime next year.”

Filing deadlines: two separate returns

Once registered, an in-scope UAE entity faces two distinct filing obligations, each running on its own clock:

• Top-up Tax Return — due 15 months after the end of the reporting fiscal year, extended to 18 months where that year is the group’s first transition year under the rules.
• Pillar Two Information Return — a separate disclosure obligation, also due within 15 months of the reporting fiscal year end.

For most groups with a 31 December 2025 year end, this means the first Top-up Tax Return falls due on 30 June 2027, using the 18-month transition window. Groups should not assume one filing covers both obligations — the return and the information return are prepared and submitted separately.

What this means for you: 30 June 2027 feels distant, but the underlying data — country-by-country financial results, adjustments to accounting profit, and effective tax rate calculations — needs to be built from the 2025 financial year onward. This is not a task you can compress into the final quarter.

Transitional penalty relief — and its limits

Recognising how new this regime is, the UAE is not imposing administrative penalties for late filing of the Top-up Tax Return or Information Return where the fiscal period in question begins on or before 31 December 2026 and does not end after 30 June 2028. This relief is conditional: the group must be able to demonstrate it took reasonable measures to comply with the rules correctly, not that it ignored them.

That distinction matters. A group that registered on time, kept supporting workpapers, and made a genuine attempt at the calculations is protected even if the return itself contains errors corrected later. A group that did nothing and registered only after prompting is in a much weaker position if the FTA later reviews the period.

What this means for you: penalty relief is a grace period for good-faith effort, not an excuse to delay registration or filing preparation.

What to do now

Start with a scope check. Ask your group’s head office, or your UAE finance lead, for the latest consolidated revenue figures against the EUR 750 million threshold across the last four years. If the group is anywhere close to that line, treat the UAE entity as in scope until proven otherwise.

Next, confirm your financial year end and work out your actual registration deadline — either the standard seven-month rule or the 30 November 2026 transitional date. Register on EmaraTax well before that date; leaving it to the final week invites avoidable errors.

Then build the underlying records. Effective tax rate calculations under the GloBE rules draw on detailed, reconciled financial data, which is only possible if your bookkeeping is current and audit-ready. Groups that treat this as a once-a-year scramble typically underestimate how much data preparation the calculation needs.

Finally, keep a record of the steps you took and when — registration date, correspondence, draft workings — so that if the FTA does review the period, you can demonstrate the “reasonable measures” the penalty relief requires. Where the group also has unresolved VAT or VAT penalty matters, address those separately; DMTT compliance does not substitute for other filing obligations.

Frequently asked questions

Does the Domestic Minimum Top-up Tax replace UAE corporate tax?

No. It sits alongside the standard corporate tax regime. An in-scope entity still files its normal corporate tax return; the top-up tax is a separate calculation and return that applies only where the UAE effective tax rate, including corporate tax paid, falls below 15%.

What if our UAE entity is small but our global group is large?

Scope is determined at group level, not at the level of the individual UAE entity. A small UAE subsidiary or branch of a large multinational group can still have its own registration and filing obligation.

We registered for corporate tax already — do we need to register again for the top-up tax?

Yes. Top-up tax registration is a separate process on EmaraTax from corporate tax and VAT registration, even though it uses the same portal.

What happens if we miss the registration deadline?

Transitional penalty relief exists for return filing, but it depends on being able to show the group took reasonable measures to comply. Missing registration altogether, with no attempt to engage, is a weaker position than registering late with a documented reason.

How do we find out if our group meets the EUR 750 million threshold?

This is tested against the ultimate parent’s consolidated financial statements over the preceding four financial years. UAE finance teams should request this confirmation directly from group head office or group tax if they do not already hold it.