UAE 15% Minimum Top-up Tax: Registration Due 30 November 2026 for DIFC Group Companies

If your DIFC or ADGM company belongs to a large international group, there is a registration deadline to note: 30 November 2026. That is the transitional date for registering for the UAE's Domestic Minimum Top-up Tax, the UAE's implementation of the global 15% minimum tax for multinational groups.

This guide explains which groups are in scope, which UAE entities must register, how the registration works, and how the top-up tax interacts with the 0% rate available to Qualifying Free Zone Persons. It is written for group finance teams and for the boards of DIFC holding and operating companies that sit inside larger groups.

The short answer

UAE entities belonging to a multinational group with consolidated revenue of at least EUR 750 million in two of the four preceding fiscal years must register for the Domestic Minimum Top-up Tax. Where the group's first fiscal year in scope ended before 30 April 2026, registration is due by 30 November 2026; in other cases it is due within seven months of the end of the first fiscal year in scope. Registration can be required even where the top-up tax works out at zero, and funds that are Investment Entities are generally outside the charging rules.

What the Domestic Minimum Top-up Tax is

The OECD's Pillar Two rules set a 15% global minimum effective tax rate for large multinational groups. The UAE has implemented a Domestic Minimum Top-up Tax, applying to fiscal years beginning on or after 1 January 2025. Its legal basis is Federal Decree-Law No. 60 of 2023, which amended the Corporate Tax Law to allow a top-up tax, and Cabinet Decision No. 142 of 2024, which introduced it.

The idea is straightforward. Where a large group's UAE profits are taxed at an effective rate below 15%, the UAE collects the difference itself, rather than leaving it to be collected by another country under the global rules. For the UAE, that keeps the tax at home. For the group, it means one more registration, calculation and return in the UAE.

The Federal Tax Authority's Top-up Tax guidance, including the Scope and Registration guide (TTGREG1) issued in August 2026, sets out how the rules work in practice.

Is your group in scope?

Work through four questions, as summarised in Crowe's review of the FTA guide:

1. Is the group multinational? At least one entity or permanent establishment must be outside the jurisdiction of the ultimate parent. A purely domestic UAE group is outside scope.
2. Does it meet the revenue threshold? Consolidated revenue of at least EUR 750 million in at least two of the four preceding fiscal years.
3. Is the UAE entity within the charging provisions? Excluded Entities, Investment Entities and certain stateless entities are generally not subject to the top-up tax.
4. Is the top-up tax deemed to be zero? Even if a safe harbour or exclusion reduces the tax to zero, registration may still be required.

Two details often surprise groups. First, the revenue of an Excluded Entity can still count towards the EUR 750 million threshold where it is consolidated. Second, a zero liability does not remove the duty to register.

Which UAE entities must register

For a group in scope, the registration population can include:

• UAE Constituent Entities, including DIFC and ADGM companies
• Permanent establishments in the UAE
• Minority-owned constituent entities
• Joint ventures and their subsidiaries
• Certain reverse hybrid entities

What this means for DIFC funds

DIFC funds that qualify as Investment Entities under the Pillar Two rules are generally outside the charging provisions and are not usually required to register. Their revenue may still count towards the group threshold. A group that owns both a fund and an operating or holding company in the DIFC should therefore assess each entity separately, rather than assuming one answer covers the whole structure.

Registration deadlines

For a group with a calendar fiscal year, the first fiscal year in scope is 2025, which ended before 30 April 2026, so the deadline is 30 November 2026. The first top-up tax return and payment are generally due 18 months after the end of that first fiscal year, which is 30 June 2027 for a calendar 2025 year.

Registration is made through EmaraTax. An administrative penalty can apply per affected entity for late registration, so it is worth completing well before the deadline.

Entity by entity, or one filer for the group

Groups can register in one of two ways:

• Entity by entity: each in-scope UAE entity submits its own application and receives its own top-up tax registration number.
• Through a Domestic Designated Filing Entity: one UAE group member registers all the entities it represents. Each entity still receives a registration number, and the designated entity also receives a group-level number and manages filing and payment.

For groups with several UAE entities, a designated filing entity usually makes the ongoing compliance far simpler. Separate designated entities are needed for a domestic main group and a domestic joint venture group.

How the top-up tax interacts with the 0% free zone rate

A DIFC or ADGM company that is a Qualifying Free Zone Person can pay 0% corporate tax on its qualifying income. For entities in an in-scope group, the top-up tax can still apply: where the UAE effective tax rate is below 15%, the Domestic Minimum Top-up Tax brings it up to that level. Our guide to Qualifying Free Zone Person status in the DIFC explains the free zone conditions, which continue to matter for corporate tax itself.

For groups below the EUR 750 million threshold, nothing changes: the ordinary corporate tax rules, including the free zone regime, continue to apply exactly as before.

A practical checklist for November

1. Confirm scope. Check the multinational test and the revenue test for each of the four preceding fiscal years.
2. Map every UAE entity. Include DIFC, ADGM and mainland companies, branches and joint ventures.
3. Classify each entity. Identify any Investment Entities or Excluded Entities, and record the reasoning.
4. Choose the registration route. Decide whether a designated filing entity suits the group.
5. Gather the information. Entity details, ownership chains and the group's consolidated revenue figures.
6. Register on EmaraTax before 30 November 2026, then diarise the June 2027 return.

How Atlas helps

Atlas Corporate Services is a DFSA-registered Corporate Service Provider in the DIFC. We maintain the group structure charts, registers and entity records that a top-up tax registration draws on, through our company secretarial and governance service, and we help groups establish and administer DIFC holding and operating companies through DIFC company setup. Corporate tax and top-up tax registrations are delivered with GTAG, our sister company in the GTAG/Assetica group, through our accounting and tax service.

This article is general information and does not constitute legal, tax or regulatory advice. The Pillar Two rules are detailed and fact-specific; confirm the position for your group with a qualified adviser before acting.