When the UAE opened Domestic Minimum Top-Up Tax registration on EmaraTax earlier this year, one question had no answer: when exactly did you have to register by? There was no fixed date, just an open sign-up. That gap is now closed. The Federal Tax Authority has set a hard registration deadline, and for most large groups already in scope it falls on 30 November 2026.
TL;DR: FTA Decision No. 12 of 2026 sets the registration and deregistration rules for the UAE's 15% top-up tax. In-scope entities must register within seven months of their first in-scope financial year end. Groups whose first in-scope year ended before 30 April 2026 have until 30 November 2026. Registration runs through EmaraTax, and it applies to UAE members of groups earning EUR 750 million or more.
What the FTA Has Just Confirmed
The FTA issued Decision No. 12 of 2026 on 16 July 2026, published on 4 August 2026, setting out how UAE entities register and deregister for the Domestic Minimum Top-Up Tax (DMTT) (Crowe UAE). It applies to financial years starting on or after 1 January 2025, the same start point as the top-up tax itself.
Until this Decision, the FTA had opened registration on EmaraTax but had not attached a deadline to it. Our earlier guide on who the 15% top-up tax catches flagged that open registration was not a strategy. Now there is a date, and missing it moves a group from "signing up early" to "late compliance."
When Must You Register for the UAE Top-Up Tax?
An in-scope entity must apply to register within seven months from the end of the first financial year in which it comes into scope (Crowe UAE). That mirrors the seven-month window many groups already know from standard corporate tax registration relief, so the rhythm is familiar even if the tax is new.
A transitional rule covers the many groups already caught. If your first in-scope financial year ended before 30 April 2026, you have until 30 November 2026 to register (oecdpillars.com, 2026). In practice, a group with a 31 December 2025 year end falls squarely in this bracket and must be registered on EmaraTax by 30 November 2026. That is the date most in-scope UAE businesses need in their calendar right now.
Who Actually Has to Register?
Registration applies to UAE members of multinational groups with consolidated global revenue of EUR 750 million or more in at least two of the four financial years before the tested year (UAE Ministry of Finance). That is roughly US$857 million, so this is a large-group obligation, not one that reaches standalone SMEs.
Scope is wider than the mainland trading company most people picture. It reaches UAE subsidiaries, joint ventures, permanent establishments, and free zone entities (Middle East Briefing, 2026). What we see most often is a free zone company on the 0% qualifying rate assuming it sits outside all of this. It does not. A 0% free zone entity inside a group that crosses the threshold still has to register. Businesses relying on Small Business Relief are below the group threshold and stay out entirely.
How Do You Register on EmaraTax?
Registration is handled through the FTA's EmaraTax platform, the same portal used for corporate tax and VAT (Crowe UAE). Each in-scope UAE constituent entity registers in its own right, so a group with several UAE companies files several applications rather than one group-level sign-up.
Before you start, map every UAE entity in the group, including dormant companies and free zone arms, because each one that meets the definition needs its own registration. In our experience the delays come not from the portal but from the group data behind it: confirming which entities are constituent entities, and pinning down the consolidated revenue history that proves the EUR 750 million test is met. Get that mapping done first, then the EmaraTax step is straightforward.
When Can You Deregister?
Decision No. 12 also sets the exit rules. An entity must apply to deregister within six months from the earlier of the date it ceases to exist or the end of the financial year in which it leaves an MNE group and drops out of scope (oecdpillars.com, 2026). A separate transitional window gives entities that ceased to exist before 30 June 2026 until 31 December 2026 to file.
Deregistration is not automatic. An entity cannot be deregistered until it has settled all top-up tax and penalties due and filed every outstanding top-up tax return and Pillar Two information return (Crowe UAE). So a group cannot use deregistration to walk away from an open liability. The obligations close out first, then the registration does.
What Happens If You Miss the Deadline?
Failure to register on time falls under the UAE corporate tax administrative penalty regime, the same framework that applies to late corporate tax registration. There is transitional relief on the return side: no penalties apply to the top-up tax return or information return for fiscal periods beginning on or before 31 December 2026, provided the period does not end after 30 June 2028 and the group took reasonable measures to apply the rules correctly (EY).
Read that relief narrowly. It covers filing, and it depends on documenting the reasonable steps you took. It is not a reason to leave registration itself late. One question clients always ask is whether the penalty relief lets them wait. It does not extend the 30 November 2026 registration date, so treat the two as separate clocks.
What Should In-Scope Groups Do Now
Start with the threshold test. Confirm whether the group crossed EUR 750 million in two of the four preceding financial years, because that single fact decides whether Decision No. 12 touches your UAE entities at all. If it does, diarise 30 November 2026 and register every in-scope UAE constituent entity on EmaraTax well before it.
Filing sits on a longer clock: the first top-up tax return is due within 15 months of the financial year end, extended to 18 months for the transitional first year, so a 31 December 2025 year end files by 30 June 2027 (Middle East Briefing, 2026). Where the scope test or your effective tax rate is genuinely unclear, it is worth getting an advance answer from the FTA rather than guessing under a fixed deadline.
Frequently Asked Questions
What is the deadline to register for the UAE top-up tax?
In-scope entities must register within seven months of the end of their first in-scope financial year. Under the transitional rule in FTA Decision No. 12 of 2026, groups whose first in-scope year ended before 30 April 2026, which includes any 31 December 2025 year end, must register on EmaraTax by 30 November 2026.
Do free zone companies have to register for the DMTT?
Yes, if the free zone entity belongs to a group that meets the EUR 750 million revenue threshold. A qualifying 0% corporate tax rate does not remove the registration obligation. Each in-scope UAE constituent entity, mainland or free zone, registers separately through EmaraTax.
Is registration the same as filing the top-up tax return?
No. Registration and filing run on separate clocks. Registration is due within seven months of the first in-scope year end, or by 30 November 2026 under the transitional rule. The first top-up tax return is due within 15 months of the financial year end, or 18 months for the transitional first year, so a 31 December 2025 year end files by 30 June 2027.
When can an entity deregister from the top-up tax?
An entity must apply to deregister within six months from the earlier of the date it ceases to exist or the end of the financial year in which it leaves the group and falls out of scope. It cannot be deregistered until all top-up tax, penalties, returns, and Pillar Two information returns are settled and filed.
Does my SME need to register?
No. The top-up tax and its registration rules only apply to UAE members of multinational groups with consolidated global revenue of EUR 750 million or more in two of the four preceding financial years. A standalone UAE business below that group threshold is not in scope.
Not sure whether your group crosses the EUR 750 million threshold, or which of your UAE entities need to register before 30 November 2026? Get in touch and we will run the scope test, map your constituent entities, and handle the EmaraTax registration so nothing slips past the deadline.