Large multinational groups operating in the UAE now face a second layer of tax logic sitting on top of the headline Corporate Tax regime. The UAE has adopted the OECD's global minimum tax through a Domestic Minimum Top-Up Tax (DMTT), designed to ensure that big groups pay an effective rate of at least 15% on their UAE profits. For finance leaders and their advisers, the practical question is no longer whether Pillar Two applies, but whether the numbers behind it have been measured correctly.
This guide walks through what Pillar Two is, how the UAE DMTT operates, who falls inside the net, and how the tax interacts with UAE Corporate Tax and Transfer Pricing. It is written for CFOs, finance teams, tax professionals, and accountants who need a working understanding before their first filing falls due. For a companion overview, our team has also published a focused explainer on how the UAE Pillar Two and DMTT top-up tax works.
What is Pillar Two?
Pillar Two is the global minimum tax component of the OECD/G20 project on the tax challenges arising from the digitalisation of the economy. It was developed under the OECD/G20 Inclusive Framework on BEPS, a body of more than 145 countries and jurisdictions, including the United Arab Emirates, that work together on international tax standards.
The core idea is straightforward. Base erosion and profit shifting, where profits are moved to low or no tax locations, costs governments significant revenue every year. Pillar Two responds by setting a floor. If a large multinational group's profits in a jurisdiction are taxed below 15%, a top-up tax collects the difference so the group reaches that minimum rate.
The rules that give effect to this floor are known as the Global Anti-Base Erosion, or GloBE, rules. These model rules and their commentary were agreed through the Inclusive Framework and are supported by ongoing administrative guidance. You can read the OECD's own summary of the global anti-base erosion model rules for the international baseline that national laws, including the UAE's, are built on. The OECD has continued to refine the framework, including agreed administrative guidance for the Pillar Two GloBE rules that clarifies how the rules apply in practice.
How the UAE Domestic Minimum Top-Up Tax works
A country can collect the top-up tax in different ways under Pillar Two. One option is to let a foreign parent collect it through an income inclusion rule. Another is to enact a domestic minimum tax so the country keeps the revenue itself. The UAE has chosen the second route through its Domestic Minimum Top-Up Tax.
The practical effect is important for UAE groups. Where the effective tax rate on UAE profits sits below 15%, the shortfall is payable to the UAE rather than surrendered to a foreign tax authority. The jurisdictional test still triggers a top-up either way. By enacting a DMTT, the UAE ensures the tax is due at home. For businesses, this means the central task is measuring the position accurately, because the tax will arise regardless of where it is ultimately paid.
The DMTT applies to fiscal years beginning on or after 1 January 2025 and targets a 15% minimum effective tax rate on UAE profits. It sits alongside, and does not replace, the main UAE Corporate Tax regime introduced by Federal Decree-Law No. 47 of 2022 on the Taxation of Corporations and Businesses, which the Federal Tax Authority administers through its Corporate Tax function.
Who is in scope?
Pillar Two is aimed at large groups, not ordinary businesses. The rules apply to multinational enterprise (MNE) groups that meet a size test based on consolidated revenue.
A group is in scope when its consolidated revenue reaches EUR 750 million in at least two of the four fiscal years immediately preceding the year being tested. This is the same threshold used for country-by-country reporting under the wider BEPS project, so many large groups will already be familiar with it. Where a fiscal year is shorter or longer than 12 months, the threshold is adjusted to match the period, which stops a short accounting year from creating an artificial exemption.
Some entities sit outside the rules entirely. These excluded entities typically include government bodies, international organisations, non-profit organisations, pension funds, and certain investment or real estate funds that are ultimate parent entities, along with some holding vehicles owned by those excluded entities. Every other company or permanent establishment in the group is treated as a constituent entity, which is the building block on which the tax is measured.
The EUR 750 million threshold in practice
The threshold is a group-level test, not an entity-level one. A small UAE subsidiary can be caught simply because it belongs to a large global group. Conversely, a sizeable UAE company that is not part of an in-scope MNE group, and a purely domestic group below the threshold, will generally fall outside the DMTT.
Because the test looks back over the four preceding years, groups approaching the threshold should monitor their consolidated revenue trend rather than react only in the year they cross the line. A group that breaches EUR 750 million now may find the rules bite in a later tested year.
How the top-up tax is calculated
The UAE rules follow the OECD's structured logic. At a high level, the calculation moves through the following stages.
- Identify the constituent entities that are in scope within the jurisdiction.
- Calculate GloBE income or loss for each entity, starting from financial accounting net income and making prescribed adjustments.
- Determine adjusted covered taxes for the jurisdiction.
- Calculate the jurisdictional effective tax rate (ETR).
- Apply the substance-based income exclusion to reach the excess profit.
- Calculate any top-up tax where the ETR is below 15%.
GloBE income
GloBE income or loss is the tax base for Pillar Two. It begins with the financial accounting net income of each constituent entity, prepared under an acceptable accounting standard such as IFRS, and then adjusts for specific items. Common adjustments include the removal of certain excluded dividends and equity gains, and the addition back of net tax expense. The aim is a consistent, comparable measure of income across jurisdictions that does not simply mirror local taxable income.
Covered taxes
The other half of the ETR fraction is adjusted covered taxes. Broadly, these are the corporate income taxes recorded in the accounts, refined for deferred tax movements and other prescribed adjustments. Getting covered taxes right matters, because they sit in the numerator of the ETR and directly influence whether a top-up tax arises.
Jurisdictional effective tax rate
The jurisdictional ETR is adjusted covered taxes divided by net GloBE income for the jurisdiction. If that ETR is at least 15%, no top-up tax is due for the period. If the ETR is below 15%, the top-up percentage is 15% minus the ETR, and that percentage is applied to the excess profit remaining after the substance-based income exclusion.
Substance-based income exclusion
Pillar Two rewards real economic activity by carving out a routine return from the top-up base. This is the substance-based income exclusion (SBIE). It removes a defined percentage of eligible payroll costs and a defined percentage of the carrying value of eligible tangible assets located in the UAE from the profit that can be topped up.
In the steady state, the SBIE is generally 5% of eligible payroll plus 5% of the carrying value of eligible tangible assets. During the phase-in period the percentages are higher and taper down over time. The illustrative table below shows how the carve-out rates step down across the transition, based on the design described in our detailed insight on the UAE DMTT.
| Period | Payroll carve-out | Tangible-asset carve-out |
|---|---|---|
| 2025 | 6% | 7.6% |
| By 2032 | 5.8% | 5.4% |
| Steady state | 5% | 5% |
The practical message is simple. Groups with genuine people and physical assets in the UAE face a smaller excess profit and therefore a lower top-up tax. Substance is not just a compliance concept here, it directly reduces the tax base.
Safe harbours
Running a full GloBE calculation is demanding. To ease the early years, the framework provides transitional safe harbours built on country-by-country reporting data. If a jurisdiction meets any one of the tests, the top-up tax for that jurisdiction is treated as zero for the year, and the group can avoid a complete computation for that jurisdiction.
The three transitional tests, drawn from the OECD's approach to safe harbours and penalty relief under the GloBE rules, work as follows.
| Safe harbour test | Condition to be met |
|---|---|
| De minimis | Total revenue below EUR 10 million and profit before tax below EUR 1 million |
| Simplified ETR | Jurisdictional ETR at least equal to the transition rate for the year |
| Routine profits | Profit before tax no greater than the substance-based income exclusion amount |
Relief is not permanent and it is not unconditional. Safe harbour eligibility can be tested by the authority, and a group that qualifies one year may lose the benefit the next as revenue and profits grow. Treating each test as a live annual check, rather than a one-time result, is the disciplined approach. The OECD's broader work on administrative guidance for the GloBE rules continues to shape how these mechanisms are applied.
A worked example
Consider a UAE constituent entity of an in-scope group with the following position for a fiscal year.
- GloBE income: AED 20 million
- Adjusted covered taxes: AED 1.2 million
- Substance-based income exclusion: AED 0.3 million
The jurisdictional ETR is AED 1.2 million divided by AED 20 million, which equals 6%. Since 6% is below 15%, a top-up applies. The top-up percentage is 15% minus 6%, which is 9%.
The excess profit is GloBE income less the SBIE, which is AED 20 million less AED 0.3 million, or AED 19.7 million. The top-up tax is 9% of AED 19.7 million, which is approximately AED 1.77 million. Under the DMTT, that amount is payable to the UAE rather than to a foreign parent's home authority.
This example is illustrative and simplified. Real calculations involve detailed adjustments to income and covered taxes, careful SBIE measurement, and a check of each safe harbour before any full computation is run.
Interaction with UAE Corporate Tax and Transfer Pricing
Pillar Two does not operate in isolation. It connects closely with the rest of a group's UAE tax position, and two links deserve particular attention.
The link to UAE Corporate Tax
The DMTT sits on top of the standard Corporate Tax regime. A group still calculates and files its ordinary Corporate Tax under Federal Decree-Law No. 47 of 2022, and separately assesses its Pillar Two position. The covered taxes recognised for the ETR calculation draw on the corporate income taxes in the accounts, so consistency between the two workstreams matters. Businesses that treat Pillar Two as a bolt-on, disconnected from their main filing, risk inconsistencies that are hard to defend later. Coordinating both through disciplined corporate tax compliance reduces that risk, and groups navigating the global minimum tax specifically can draw on dedicated international tax and Pillar Two support.
The link to Transfer Pricing
Transfer Pricing and Pillar Two are tightly linked. Aggressive intragroup pricing that leaves profit lightly taxed in the UAE can itself contribute to an ETR below 15% and therefore trigger a top-up. The arm's length principle that governs related-party pricing is set out in the OECD Transfer Pricing Guidelines and applied through the UAE regime. Because the GloBE calculation rests on reliable financial data, the Transfer Pricing analysis and the Pillar Two computation should be prepared together, not in separate silos. Our Transfer Pricing team works on exactly this alignment, ensuring intercompany outcomes, documentation, and the DMTT position tell a consistent story.
Filing and compliance implications
In-scope groups face new filing obligations specific to the top-up tax, in addition to their existing Corporate Tax returns. In broad terms, constituent entities in the UAE are expected to file a top-up tax return with the Federal Tax Authority, and a group may appoint a domestic designated filing entity to file on behalf of the others.
The return timing is extended compared with the ordinary Corporate Tax deadline, reflecting the complexity of the calculation, with a longer window for a group's first transition year. Because the data demands are significant, spanning finance, tax, legal, and ERP systems, preparation should begin well before the deadline. The Federal Tax Authority continues to publish Corporate Tax guides and clarifications that support taxable persons in meeting their obligations, and its general Corporate Tax guidance remains a useful reference point for the wider regime.
A practical compliance approach for an in-scope group includes the following steps.
- Confirm whether the group meets the EUR 750 million threshold for the tested year.
- Map every UAE constituent entity, joint venture, and permanent establishment.
- Test each transitional safe harbour before committing to a full computation.
- Build the GloBE income and covered taxes data set from the group's financial statements.
- Measure the substance-based income exclusion using eligible payroll and tangible assets.
- Calculate the jurisdictional ETR and any top-up tax.
- Prepare and file the top-up tax return within the applicable deadline.
Common mistakes and challenges
Several recurring errors cause avoidable problems with Pillar Two readiness.
- Assuming a small UAE entity is out of scope. Scope is tested at group level, so a small subsidiary of a large MNE group is caught.
- Confusing the ETR with the statutory Corporate Tax rate. The jurisdictional ETR is covered taxes over GloBE income, and it can differ materially from the headline rate.
- Treating a safe harbour as permanent. Eligibility is tested each year and can be lost as the group grows.
- Ignoring the SBIE. Groups with real UAE substance can reduce the top-up base significantly, and overlooking the carve-out overstates the liability.
- Preparing Pillar Two in isolation from Corporate Tax and Transfer Pricing. Inconsistencies between the workstreams invite scrutiny.
- Underestimating data demands. GloBE calculations need granular, reconciled data that many groups do not hold in a ready format.
- Leaving the return to the last minute. The calculation is complex, and a rushed process raises the risk of error or a missed deadline.
Practical recommendations
- Run a scoping assessment now to confirm whether the EUR 750 million threshold is met and which entities are in scope.
- Model your jurisdictional ETR early, so you know whether a top-up is likely before the filing period.
- Test the transitional safe harbours first, since qualifying can remove the need for a full computation for a year.
- Quantify your substance-based income exclusion, using eligible payroll and tangible asset data, to understand the real top-up base.
- Align your Pillar Two position with your Corporate Tax filing and Transfer Pricing documentation so the figures reconcile.
- Build a repeatable data process across finance, tax, and systems rather than a one-off spreadsheet.
- Where audit or dispute risk is a concern, prepare defensible supporting documentation in advance through structured audit and dispute resolution support.
If your group is unsure of its position, a short scoping conversation can resolve the key questions quickly. You can reach our specialists through our contact page.
Frequently asked questions
Which companies are subject to the UAE DMTT?
The DMTT applies to constituent entities of multinational enterprise groups whose consolidated revenue reaches EUR 750 million in at least two of the four fiscal years before the year being tested. Purely domestic groups and groups below the threshold are outside scope, as are excluded entities such as government bodies, pension funds, and qualifying investment funds.
What is the minimum tax rate under UAE Pillar Two?
The minimum effective tax rate is 15%. If a group's UAE effective tax rate, measured as adjusted covered taxes over GloBE income, falls below 15%, a top-up tax equal to the shortfall applies to the excess profit remaining after the substance-based income exclusion.
When does the UAE DMTT take effect?
The Domestic Minimum Top-Up Tax applies to fiscal years beginning on or after 1 January 2025.
How is the jurisdictional effective tax rate calculated?
The jurisdictional ETR is adjusted covered taxes divided by net GloBE income for the jurisdiction. GloBE income starts from financial accounting net income and is adjusted for prescribed items. If the resulting ETR is at least 15%, no top-up is due for the period.
What is the substance-based income exclusion?
The SBIE removes a routine return on real activity from the top-up base. It is generally 5% of eligible UAE payroll costs plus 5% of the carrying value of eligible UAE tangible assets, with higher percentages during the transition years. Groups with genuine local substance face a smaller excess profit and a lower top-up tax.
How do the transitional safe harbours help?
If a jurisdiction meets any one of the three transitional safe harbour tests, the de minimis test, the simplified ETR test, or the routine profits test, the top-up tax for that jurisdiction is treated as zero for the year, and the group can avoid a full GloBE computation for that jurisdiction. Eligibility is tested each year.
Does Pillar Two replace UAE Corporate Tax?
No. The DMTT sits alongside the main UAE Corporate Tax regime under Federal Decree-Law No. 47 of 2022. In-scope groups continue to calculate and file ordinary Corporate Tax and separately assess and file their Pillar Two position.
Conclusion
The UAE Domestic Minimum Top-Up Tax brings the OECD's global minimum tax into UAE law for fiscal years beginning on or after 1 January 2025. For large multinational groups, the central discipline is measurement: confirming scope against the EUR 750 million threshold, calculating a jurisdictional effective tax rate that reflects GloBE income and covered taxes, applying the substance-based income exclusion, and testing each safe harbour before running a full computation.
Because the DMTT interacts closely with UAE Corporate Tax and Transfer Pricing, the strongest position comes from treating these as one connected workstream rather than three separate exercises. Groups that scope early, model their ETR, build a repeatable data process, and align their filings will turn Pillar Two from a year-end scramble into a managed, defensible part of their annual compliance cycle.
This publication is for general information only and does not constitute professional advice. Please consult a qualified advisor before acting on any matter covered here.
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