Corporate Tax in UAE

UAE's 15% Global Minimum Tax: The 30 November 2026 DMTT Registration Deadline Large Groups Can't Afford to Miss For most UAE businesses, Corporate Tax in UAE means one number: 9%, or 0% if you're a qualifying Free Zone company. For a specific group of large multinational businesses, that's no longer the full picture. A separate tax, running alongside the standard UAE Corporate Tax regime, is now live and for groups that fall within it, the registration deadline is 30 November 2026.

This is the Domestic Minimum Top-up Tax (DMTT), and it represents one of the most significant shifts in UAE Corporate Tax since the regime itself was introduced. It doesn't touch the vast majority of UAE SMEs and family businesses. But if your company is part of a large international group, ignoring it is not an option, and this is exactly the kind of activity-specific risk that proper Corporate Tax Advisory in UAE is built to catch before it becomes a compliance problem.

What Is the UAE's Domestic Minimum Top-up Tax? The DMTT is the UAE's implementation of the OECD's Pillar Two global minimum tax framework, introduced through Cabinet Decision No. 142 of 2024. Its purpose is simple: ensure that large multinational enterprise (MNE) groups pay an effective tax rate of at least 15% on the profits they generate in the UAE. It applies to financial years starting on or after 1 January 2025, which means for calendar-year businesses, the 2025 financial year was already the first year in scope even though most affected groups are only now working through what that means in practice.

Crucially, the DMTT does not replace the standard 9% Corporate Tax. It sits alongside it. A group first calculates its UAE Corporate Tax position as usual, then runs a separate Pillar Two effective tax rate calculation. If that calculation shows the group's UAE profits were taxed below 15%, a top-up amount becomes due to bring the total up to that floor. The UAE collects this top-up itself, rather than allowing another country to collect it through international Pillar Two mechanisms.

Who Actually Falls Within Scope This is where many businesses assume they're affected when they're not, or the reverse. The DMTT applies to the Constituent Entities of a multinational group whose consolidated global revenue reached EUR 750 million or more in at least two of the four financial years immediately before the year being tested. This test is applied at the level of the entire global group, not the UAE entity in isolation.

That has two important implications: a small UAE subsidiary or branch office can be in scope purely because it belongs to a large international group, even if the UAE entity itself is modest

in size, and a large, UAE-only business with no foreign operations generally sits outside the DMTT, regardless of its revenue, because the rules target cross-border groups.

Investment Entities that are widely held and meet specific conditions are excluded from the top-up tax. The UAE has also chosen not to introduce the Income Inclusion Rule or Undertaxed Profits Rule that some other Pillar Two jurisdictions apply for its implementation is limited to the domestic top-up itself.

Why Free Zone Companies Cannot Assume They're Exempt This is the point that catches out most groups. Qualifying Free Zone Persons benefiting from a 0% Corporate Tax rate on qualifying income are not automatically outside the DMTT. If a Free Zone entity belongs to an in-scope multinational group, its 0% Corporate Tax result is exactly the kind of low effective tax rate the DMTT is designed to top up to 15%.

In other words, for large groups, the Free Zone 0% benefit and the DMTT need to be assessed together, not separately. A structure that looks fully tax-efficient under the standard Corporate Tax rules can still generate a top-up liability once the Pillar Two calculation is applied. This mirrors a theme we've covered in our review of how the FTA's 2026 rulings are tightening Free Zone Corporate Tax compliance more broadly the assumption that Free Zone status guarantees 0% tax is becoming less safe across multiple areas of the regime, not just this one.

The Registration Deadline: 30 November 2026 For in-scope entities with a first affected financial year ending 31 December 2025, the deadline to register for DMTT purposes is 30 November 2026. This registration is a separate obligation from standard Corporate Tax registration, and it is not optional for groups that meet the revenue threshold.

Missing this deadline creates unnecessary risk at exactly the point where large groups can least afford compliance gaps, given the scale of profits typically involved.

Filing Deadlines: More Time, But More Work The Top-up Tax Return itself is generally due within 15 months of the fiscal year-end, extended to 18 months for the first transitional year. For most calendar-year groups, the first DMTT return, covering FY2025, falls due by mid-2027 rather than in 2026.

That extended window exists because first-cycle compliance is genuinely demanding. Groups need entity-level financial data aligned to GloBE accounting mechanics, a full covered-tax

analysis, correct treatment of foreign withholding taxes, and reconciliation between the DMTT calculation and the standard Corporate Tax return for the same period none of which can be assembled in the weeks before a deadline. The registration date is really the start of the real work, not the finish line.

Transitional Relief and Safe Harbours Worth Understanding Two forms of relief are available to in-scope groups during the early years of the regime.

Penalty relief means no penalties apply for late or incorrect filing of the Top-up Tax Return or the associated Pillar Two information return, for periods beginning on or before 31 December

2026, provided the group can show it took reasonable measures to apply the DMTT correctly though this does not extend to late payment of the actual top-up tax liability. Standard Corporate Tax penalties for late registration and late filing still apply in full outside this narrow relief window; see our breakdown of Corporate Tax penalties under UAE Cabinet Decision No. 75 of 2023 for the wider penalty framework. The Transitional CbCR Safe Harbour allows a group to elect to deem its UAE top-up tax to be zero for a transitional year, applying to fiscal years starting before 1 January 2027, provided specific conditions are met and properly evidenced.

Neither of these removes the underlying obligation to assess exposure; they reduce risk for groups genuinely working through compliance, not those ignoring the rules altogether.

What In-Scope Groups Should Be Doing Now 1. Confirm the revenue test first. Check whether your ultimate parent's global revenue met EUR 750 million in at least two of the last four years.

2. Map every UAE Constituent Entity, mainland and Free Zone, since the DMTT applies across both.

3. Register before 30 November 2026 if your first in-scope financial year ended 31 December 2025.

4. Start the ETR calculation early rather than waiting for the 15–18 month filing window to close.

5. Review Free Zone structures specifically, modelling the DMTT impact separately from the Free Zone benefit itself.

6. Coordinate DMTT and Corporate Tax filings so the two calculations reconcile rather than raising red flags.

How Corporate Tax Advisory in UAE Supports DMTT Readiness DMTT compliance sits at the intersection of Corporate Tax, group structuring, and international reporting which makes it a poor fit for a once-a-year, last-minute filing exercise. A structured Corporate Tax Advisory in UAE engagement for in-scope groups typically covers scope assessment against the revenue threshold, entity mapping across mainland and Free Zone operations, DMTT registration ahead of the 30 November 2026 deadline, and coordination between your Corporate Tax and Pillar Two filing positions so both remain consistent and auditready.

BSD Prime Services works with UAE businesses and multinational groups to assess Corporate Tax and DMTT exposure together, register correctly, and prepare for filing well ahead of

statutory deadlines. Explore the full scope of support on our Corporate Tax Advisory and Consultation page.

Don't Let a Global Rule Become a Local Surprise The DMTT was designed to keep tax revenue on UAE profits within the UAE rather than losing it to other jurisdictions, but that only works smoothly for groups that register, calculate, and file correctly. With the 30 November 2026 registration deadline approaching for FY2025 in-scope entities, now is the time to confirm where your group stands.

Speak to a Corporate Tax Advisory specialist at BSD Prime Services to assess your group's DMTT exposure before the deadline. Visit www.primeservicesdubai.com or call +971 50 710 3139 today.

Frequently Asked Questions What is the UAE Domestic Minimum Top-up Tax (DMTT)?

The DMTT is the UAE's implementation of the OECD's Pillar Two global minimum tax framework, under Cabinet Decision No. 142 of 2024. It ensures large multinational groups pay an effective tax rate of at least 15% on UAE profits, applying alongside the standard 9% Corporate Tax rather than replacing it.

Who does the DMTT apply to?

Constituent Entities 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. The test is based on the group's worldwide revenue, not the UAE entity's revenue alone.

Does the DMTT apply to Free Zone companies with 0% Corporate Tax? Yes, if the Free Zone entity belongs to an in-scope multinational group. A 0% Qualifying Free Zone Person result does not exempt a business from the DMTT. It is exactly the kind of low effective tax rate the DMTT is designed to top up to 15%.

When is the DMTT registration deadline?

For entities with a first in-scope financial year ending 31 December 2025, the registration deadline is 30 November 2026. Groups meeting the revenue threshold should confirm their obligation well before this date.

When is the first DMTT return due, and is there penalty relief?

The Top-up Tax Return is generally due within 15 months of the fiscal year-end, extended to 18 months for the first transitional year around mid-2027 for most calendar-year groups. No penalties apply to late or incorrect filings for periods beginning on or before 31 December 2026 if the group took reasonable measures to comply, though this does not cover late payment of tax due.

How can Corporate Tax Advisory in UAE help with DMTT compliance?

An advisory review assesses whether your group meets the revenue threshold, maps all UAE Constituent Entities across mainland and Free Zone operations, manages registration ahead of the 30 November 2026 deadline, and keeps your Corporate Tax and DMTT positions consistent and audit ready. BSD Prime Services provides this support alongside standard Corporate Tax

registration and filing visit the tax consultation page, call +971 50 710 3139, or go to www.primeservicesdubai.com to speak with a specialist.