The 15% Question: Is Your UAE Group Ready for DMTT Filings?

The UAE’s 9% corporate tax rate made headlines as one of the most competitive in the world. But for large multinational groups, a second tax layer has quietly arrived — and the first filing deadlines are approaching fast.

The Domestic Minimum Top-Up Tax (DMTT), introduced under Cabinet Decision No. 142 of 2024, ensures that UAE entities of large multinational groups pay an effective tax rate of at least 15%. This aligns the UAE with the OECD’s Pillar Two framework.

Here’s what finance leaders need to know right now.

Who Falls Within Scope?

The DMTT applies to multinational enterprise groups with consolidated revenue of €750 million or more in at least two of the last four fiscal years. If your group crosses that threshold, every UAE constituent entity — mainland and free zone — is in scope.

This includes free zone companies that previously enjoyed a 0% rate. Under DMTT, if a free zone entity’s effective tax rate falls below 15%, the top-up tax closes the gap.

How the Calculation Works

The effective tax rate (ETR) is calculated as adjusted covered taxes divided by net Pillar Two income. If the ETR is below 15%, the DMTT tops it up.

Consider a free zone entity earning AED 100 million in profit. Under standard CT rules, it pays AED 9 million (9%). But if the ETR is 9%, the DMTT adds approximately AED 6 million to reach the 15% minimum — bringing total tax to AED 15 million.

There is relief available. The Substance-Based Income Exclusion (SBIE) carves out a portion of income based on payroll costs (5% of UAE employee compensation) and tangible assets (5% of carrying value). However, these rates decline to 2.5% over a ten-year transition period, meaning the relief shrinks over time.

The Filing Timeline

For groups with fiscal years starting January 1, 2025, the first DMTT return is due by June 2026 — just months away. The transitional period allows 18 months for the first filing, but subsequent years revert to the standard 15-month deadline.

Two filings are required: the DMTT top-up tax return and the GloBE Information Return. Both must be submitted to the FTA.

Additionally, groups must notify the FTA of their DMTT applicability. This notification was expected in Q1 2026.

Free Zone Entities: The Biggest Impact

Free zone companies face the most significant adjustment. Entities in DMCC, Jebel Ali Free Zone, ADGM, IFZA, and similar zones that previously operated at 0% now face a potential 15% effective rate under DMTT.

This doesn’t mean free zone benefits are dead. Qualifying Free Zone Persons can still access the 0% rate on qualifying income under CT law. But DMTT operates separately — it looks at the group’s overall effective rate, not individual entity rates. If the blended ETR across all UAE entities falls below 15%, the top-up applies.

Practical Steps for Finance Teams

1. Confirm your group’s revenue threshold. Pull consolidated revenue for the last four fiscal years. If you’re near €750 million, model both scenarios.

2. Calculate your UAE ETR. This isn’t your statutory rate — it’s the actual effective rate after all adjustments, including free zone exemptions and incentives. Many groups discover their ETR is lower than expected.

3. Model the SBIE relief. Quantify how much of your income is excluded based on payroll and tangible assets. This can significantly reduce the top-up amount, especially for groups with substantial UAE operations and physical infrastructure.

4. Evaluate transitional safe harbours. The transitional CbCR Safe Harbour remains available for qualifying groups. If your group meets the revenue and ETR tests, you may avoid detailed DMTT calculations for the initial years.

5. Assess restructuring options. Some groups may benefit from relocating high-profit activities or restructuring intercompany arrangements to optimize their overall ETR position. This requires careful analysis — the FTA has expanded audit powers under Cabinet Decision No. 17 of 2026, and transfer pricing adjustments can trigger DMTT recalculations.

The Penalty Reality

The FTA has not yet published specific DMTT penalty schedules, but the framework signals serious enforcement. Incorrect ETR calculations could result in penalties up to 100% of the underpaid tax. Late registration and late filing penalties are expected to align with existing CT penalty structures.

The Bigger Picture

The DMTT doesn’t eliminate the UAE’s tax advantage — a 15% effective rate is still competitive globally. But it does end the era of zero-tax structures for large groups. Companies that prepare now will navigate the transition smoothly. Those that delay will face compressed timelines, potential errors in their first filings, and exposure to penalties.

The window for preparation is closing. If your group is in scope and hasn’t started modeling its ETR, this is the week to begin.

FSH Financial Consultants — Corporate Tax & Transfer Pricing Advisory