UAE DMTT Compliance Guide: Calculations, Filing Requirements and Key Deadlines

UAE DMTT Compliance Guide: Calculations, Filing Requirements and Key Deadlines

The United Arab Emirates has introduced the Domestic Minimum Top-up Tax (DMTT) as part of the international tax reforms designed to ensure that large multinational enterprise (MNE) groups pay a minimum effective level of tax on their profits in each jurisdiction where they operate.

The UAE DMTT applies to relevant fiscal years starting on or after 1 January 2025. Although the UAE Corporate Tax system generally applies a 9% rate to taxable income exceeding AED 375,000, the DMTT framework introduces additional rules for multinational groups meeting the global revenue threshold.

Businesses potentially covered by these rules must assess their group structure, calculate their effective tax rate, understand their registration obligations and prepare for the relevant tax filings. In 2026, the Federal Tax Authority (FTA) also issued specific registration and deregistration requirements through FTA Decision No. 12 of 2026.

This guide explains the UAE domestic minimum top-up tax, how the calculation works, who may be affected and the key compliance deadlines.

1. What Is UAE Domestic Minimum Top-up Tax?

The UAE domestic minimum top-up tax is part of the OECD/G20 Pillar Two framework, commonly known as the Global Anti-Base Erosion (GloBE) rules.

The framework aims to ensure that large multinational groups are subject to a minimum effective tax rate of 15% in each jurisdiction where they operate, subject to the detailed rules and adjustments under the legislation.

The UAE introduced its DMTT regime through Cabinet Decision No. 142 of 2024, covering fiscal years beginning on or after 1 January 2025.

The idea is simple. The UAE wants to collect the top-up tax on profits earned inside the country. If it doesn’t, another country may collect that tax under international rules.

DMTT does not apply to every UAE company. Whether it applies depends mostly on the total revenue of the multinational group and on the status of the entities in that group.

UAE DMTT Compliance Guide: Calculations, Filing Requirements and Key Deadlines

The United Arab Emirates has introduced the Domestic Minimum Top-up Tax (DMTT) as part of the international tax reforms designed to ensure that large multinational enterprise (MNE) groups pay a minimum effective level of tax on their profits in each jurisdiction where they operate.

The UAE DMTT applies to relevant fiscal years starting on or after 1 January 2025. Although the UAE Corporate Tax system generally applies a 9% rate to taxable income exceeding AED 375,000, the DMTT framework introduces additional rules for multinational groups meeting the global revenue threshold.

Businesses potentially covered by these rules must assess their group structure, calculate their effective tax rate, understand their registration obligations and prepare for the relevant tax filings. In 2026, the Federal Tax Authority (FTA) also issued specific registration and deregistration requirements through FTA Decision No. 12 of 2026.

This guide explains the UAE domestic minimum top-up tax, how the calculation works, who may be affected and the key compliance deadlines.

3. How is DMTT calculated?

Not by taking 15% of your accounting profit. It’s more involved than that.

You need to work out a few things: the group’s GloBE income or loss, the adjusted covered taxes, the effective tax rate, and any substance-based income exclusion.

Here is the process in short.

Step 1: Find the entities in scope

Make a list of the UAE entities, and any other arrangements, that fall under the rules.

Step 2: Work out adjusted income

Begin with your accounting results. Then make the changes the GloBE rules ask for. The number you end up with may not match the profit in your financial statements. It may also be different from the taxable income you use for normal UAE Corporate Tax.

Step 3: Work out adjusted covered taxes

Find out which taxes count as covered taxes and calculate the adjusted amount. Don’t just take the Corporate Tax expense from your books. It may not be the same.

Step 4: Find the effective tax rate

Divide the adjusted covered taxes by the GloBE income. The result is the effective tax rate for the country.

Step 5: Find the top-up tax percentage

If the effective tax rate is below 15%, the gap between your rate and 15% is usually the starting point.

Step 6: Apply the final adjustments

Now factor in the substance-based income exclusion and the other adjustments and rules. Only after this do you get the final top-up tax amount.

A simple example

Say a multinational group has a UAE entity with these figures:

At first look, 6% of AED 10 million is AED 600,000.

But that is not necessarily what you will pay. The real figure can change after the substance-based income exclusion, other adjustments, tax allocation rules and other provisions are applied.

This example only shows the basic idea. Please don’t use this shortcut to prepare your actual DMTT return.

4. Registration deadline: FTA Decision No. 12 of 2026

FTA Decision No. 12 of 2026 sets out the rules for registering and deregistering for UAE top-up tax.

The general rule is this: if your entity is in scope, you must apply to register within seven months after the end of the first fiscal year in which you fall under the rules.

There is also a special deadline for entities whose fiscal year ended before 30 April 2026. They must apply on or before 30 November 2026.

Example: An in-scope entity has a fiscal year ending on 31 December 2025. It should check the special deadline and register by 30 November 2026, if that rule applies to it.

One more point. Being registered for UAE Corporate Tax does not mean you have met the top-up tax registration requirement. They are separate. Check the FTA’s guidance and your own situation to see what you need to do.

5. Filing: what should you prepare?

Registration is only the first step. In-scope groups also need to check what returns and information reports they have to file.

These are the main things to prepare:

• Top-up tax registration: Register with the FTA before the deadline.
• Calculations: Prepare the GloBE income, adjusted covered tax and effective tax rate.
• Records: Keep financial statements, tax computations, group structure details and your working papers.
• Pillar Two Information Return: Find out which entities must file it, and whether one local entity can file for the others.
• Tax return: Check which top-up tax returns apply to you and when they are due.
• Payment: Work out any top-up tax due and pay it on time.

Ministerial Decision No. 133 of 2026 covers which entities must file the Pillar Two Information Return.

It covers relevant UAE constituent entities, joint ventures and joint venture subsidiaries, subject to the provisions and exclusions in the legislation. Filing may be made by the relevant entity or by an eligible designated local entity on its behalf.

Businesses should distinguish the Pillar Two Information Return from the domestic top-up tax return. These are separate reporting requirements, and the applicable filing arrangements should be assessed individually.

6. What Happens When a Business Leaves the Scope?

A group may cease to meet the revenue threshold or an entity may leave the multinational group.

FTA Decision No. 12 of 2026 also establishes rules for deregistration and notifications when an entity becomes out of scope.

Generally, an entity must submit a deregistration application within six months from the earliest relevant date specified in the Decision, including the date it ceases to exist or the end of the fiscal year in which it leaves the MNE group and is no longer in scope.

The Decision also provides a special deadline of 31 December 2026 for entities that ceased to exist before 30 June 2026.

Deregistration is not automatic in every case. An entity generally cannot be deregistered until it has settled all top-up tax and penalties payable and filed the required top-up tax returns and Pillar Two Information Returns.

Where the conditions for deregistration are met but an application has not been submitted, the FTA may deregister the entity at its discretion.

7. How Can UAE Businesses Prepare for DMTT Compliance?

Businesses should begin by determining whether they belong to a multinational group that meets the global revenue threshold.

A practical preparation plan should include:

1. Obtain the ultimate parent company's consolidated financial statements for the relevant preceding fiscal years.

2. Confirm the entities, permanent establishments, joint ventures and other arrangements that may be relevant to the UAE DMTT analysis.

3. Review the group's existing UAE Corporate Tax calculations and identify differences from the GloBE calculation.

4. Prepare the information required to determine adjusted covered taxes and the effective tax rate.

5. Confirm the registration deadline and identify the entities responsible for submitting applications.

6. Establish a reporting process for the top-up tax return and Pillar Two Information Return.

7. Maintain supporting calculations and documentation for future FTA enquiries.

Groups with multiple UAE subsidiaries should coordinate the process centrally. Different entities may have separate registration or reporting responsibilities, even where the group prepares its calculations centrally.

8. How Flyingcolour Tax Consulatnt Can Help You?

Flying Colour Tax Consultant assists businesses with UAE Corporate Tax compliance, international tax advisory and tax planning.

For groups potentially affected by UAE DMTT, our support can include:

• · Initial assessment of whether the group meets the scope conditions.
• · Review of UAE entity structures and relevant group information.
• · Coordination of top-up tax registration requirements.
• · Assistance with tax calculations and compliance documentation.
• · Review of filing obligations and supporting records.
• · Coordination with group finance teams and international tax advisers.

Early assessment helps businesses identify potential reporting gaps and avoid leaving complex calculations and registrations until the deadline.

Frequently Asked Questions

1. What is the UAE top-up tax rate?

The UAE DMTT framework is designed to bring the effective tax rate on relevant in-scope profits to the 15% minimum, subject to the detailed GloBE rules, exclusions and adjustments. It is not simply a flat 15% tax on accounting profit.

2. Does the UAE DMTT apply to every company in the UAE?

No. The principal scope test concerns multinational groups with consolidated annual revenue of at least EUR 750 million in at least two of the four preceding fiscal years. Other scope conditions and exclusions must also be considered.

3. What is the UAE top-up tax registration deadline for 2026?

Under FTA Decision No. 12 of 2026, entities whose fiscal years end before 30 April 2026 must generally register by 30 November 2026 if they are subject to the regime. Other entities must assess the general seven-month registration rule.

4. Is UAE Corporate Tax registration enough for DMTT compliance?

Not necessarily. Businesses should separately assess their top-up tax registration, return filing and Pillar Two Information Return obligations.

5. Do businesses need to file a Pillar Two Information Return?

Relevant constituent entities, joint ventures and joint venture subsidiaries may have filing obligations under the applicable rules, subject to the relevant exclusions and permitted designated local entity filing arrangements.

Conclusion

The UAE domestic minimum top-up tax introduces additional compliance responsibilities for multinational groups with global consolidated revenue of EUR 750 million or more in at least two of the preceding four fiscal years.

Businesses should not focus only on the 15% minimum rate. They must also assess the scope conditions, GloBE calculations, registration deadlines, tax returns and Pillar Two information-reporting requirements.

With the regime applying to fiscal years starting on or after 1 January 2025, 2026 is an important year for reviewing UAE top-up tax registration and compliance readiness.

The best approach is to assess the group's position early, establish who is responsible for each filing and maintain reliable supporting records.

Disclaimer: This article is for general information and educational purposes only. It is not a substitute for advice based on the applicable legislation and the specific circumstances of a business. The UAE top-up tax rules are detailed, and businesses should review the relevant legislation and current FTA and Ministry of Finance guidance before making compliance decisions.

To learn more about UAE DMTT Compliance Guide: Calculations, Filing Requirements and Key Deadlines, book a free consultation with one of the Flyingcolour team advisors.

Disclaimer: The information provided in this blog is based on our understanding of current tax laws and regulations. It is intended for general informational purposes only and does not constitute professional tax advice, consultation, or representation. The author and publisher are not responsible for any errors or omissions, or for any actions taken based on the information contained in this blog.