What is a domestic minimum top-up tax? It is a tax that a country charges on the local profits of a large multinational group whenever the group's effective tax rate in that country falls below the 15% global minimum, so that the country collects the shortfall itself instead of leaving it to another jurisdiction under the OECD's Pillar Two rules. For much of the Gulf, a region long associated with zero or single-digit corporate tax, that idea became concrete compliance work at the end of August 2026. The UAE Ministry of Finance published Ministerial Decision No. 133 of 2026, naming the entities that must file the Pillar Two Information Return, and in the same week Qatar's General Tax Authority published six implementing decisions in the Official Gazette on 27 August 2026. This analysis explains what a domestic minimum top-up tax is, how the UAE, Qatar, Bahrain and Kuwait have each built one, why the OECD's side-by-side package does not take US-parented groups out of them, and which deadlines now matter.
What is a domestic minimum top-up tax?
A domestic minimum top-up tax (DMTT) is a charge that brings a multinational group's effective tax rate on its profits in a single jurisdiction up to 15%, collected by that jurisdiction rather than by the country of the parent company. It is the local, first-in-line component of the global minimum tax designed by the OECD/G20 Inclusive Framework, commonly called Pillar Two.
The mechanics follow a common pattern wherever it is adopted. The tax applies to groups with consolidated annual revenue of at least EUR 750 million in at least two of the four preceding fiscal years, the threshold used in the UAE's Cabinet Decision No. 142 of 2024 and in each of the Gulf laws discussed below. The group calculates a jurisdictional effective tax rate by comparing the taxes it has paid in the country with its profits measured on an accounting basis, subject to a long list of adjustments. If the rate is below 15%, a top-up tax equal to the difference, applied to excess profit after a substance-based carve-out for payroll and tangible assets, becomes payable locally.
Three features distinguish a domestic minimum top-up tax from an ordinary corporate income tax:
- It is jurisdictional. The test looks at all of a group's entities in the country together, so a low-taxed free zone company and a fully taxed onshore company are blended.
- It is built on financial accounts. The starting point is the profit used for the group's consolidated statements, not the local tax base.
- It only bites on large groups. Domestic businesses and smaller international groups below the EUR 750 million line are outside it.
For groups weighing where their exposure sits, a specialist in corporate tax will usually start by mapping every jurisdiction where the group's local effective rate could fall below 15%.
Why "qualified" matters: QDMTTs and the rest of Pillar Two
A qualified domestic minimum top-up tax (QDMTT) is a domestic minimum tax that the Inclusive Framework accepts as equivalent to the model rules, which gives it priority over the other two Pillar Two charges. Those charges are the income inclusion rule (IIR), which lets the parent company's jurisdiction tax low-taxed foreign subsidiaries, and the undertaxed profits rule (UTPR), a backstop that lets other jurisdictions in the group collect what remains.
The logic is simple: if a country levies a qualified domestic tax on its own low-taxed profits, there is nothing left for the parent jurisdiction to collect under the IIR, and no need for the UTPR. That is why so many historically low-tax jurisdictions have introduced one. Without a domestic charge, the revenue would flow to the parent's home country instead.
The OECD made that ordering explicit in the side-by-side package agreed on 5 January 2026. Its press release listed five components, the fifth of which reinforces the objective that qualified domestic minimum top-up tax regimes remain a primary mechanism for protecting local tax bases, particularly in developing countries. The same announcement recorded that 147 countries and jurisdictions had agreed the package.
Whether a particular Gulf regime is "qualified" is therefore not a technicality. It determines whether the group's parent jurisdiction can credit or ignore the local tax, and whether local safe harbours are available. International tax specialists treat QDMTT status as one of the first facts to confirm for each subsidiary.
Why the Gulf moved from low tax to a 15% floor
The short answer is that, once Pillar Two was in force elsewhere, a Gulf state that did not tax its own low-taxed multinational profits would simply watch other countries collect that tax. The domestic minimum top-up tax lets the revenue stay at home.
The starting points were very different. The UAE introduced a federal corporate tax at a headline rate of 9%, according to EY's summary of the UAE regime, which is below the Pillar Two floor before any free zone incentives are counted. Bahrain, as EY noted when its law was published, levied corporate income tax only on the oil and gas sector. Kuwait taxed foreign companies but not most Kuwaiti-owned businesses, and chose to replace its old regime for in-scope groups altogether.
The OECD's own numbers show why investment hubs care. Its 2026 Economic Impact Assessment, published on 15 July 2026, estimated that effective tax rates in investment hubs would rise by 5.5 to 6.9 percentage points under the current global minimum tax framework, against an average rise of 2.8 to 3.7 points across jurisdictions, and that global corporate income tax revenues would rise by 3.2% to 5.4% a year. Where that additional tax is collected depends on who moves first with a domestic charge.
For advisers across the Middle East, the practical result is that four Gulf states now operate their own minimum tax machinery, each with its own registration portal, forms and deadlines, and each at a different stage of administration.
The UAE: Cabinet Decision No. 142 of 2024
The UAE's domestic minimum top-up tax is set out in Cabinet Decision No. 142 of 2024, issued on 31 December 2024 and applying to fiscal years beginning on or after 1 January 2025. EY reported that the Ministry of Finance released the text on 11 February 2025.
Five points define the UAE regime:
- A domestic tax only. The Ministry of Finance says on its top-up tax page that the UAE decided not to implement the income inclusion rule, citing the absence of a controlled foreign company regime. The Cabinet Decision does not introduce a UTPR either.
- Who pays. Under Article 2 of the annexure, the tax is payable by constituent entities located in the UAE, by joint ventures and JV subsidiaries located in the UAE, and by certain UAE reverse hybrid entities. Group members may appoint a Domestic Designated Filing Entity to pay on their behalf.
- When the return is due. Article 8.1.2 requires the Top-up Tax Return no later than 15 months after the end of the reporting fiscal year, or 18 months after the end of the first transition year.
- The information return. Article 15 requires the Pillar Two Information Return, in the OECD standard template, within 15 months of the year end, and leaves it to a ministerial decision to specify which entities must file.
- Payment and liability. Article 11 makes the tax payable in dirhams on the date the Top-up Tax Return is due, and Article 12 makes UAE members of the same domestic group jointly and severally liable for it.
For a calendar-year group whose first in-scope year is 2025, the 18-month transition rule points to 30 June 2027 for the first Top-up Tax Return. The Cabinet Decision also contains the transitional country-by-country reporting safe harbour, including a de minimis test for groups reporting UAE revenue below EUR 10 million and profit before tax below EUR 1 million. Groups with operations in the UAE that have not yet modelled their 2025 position are now running out of runway.
The UAE's August 2026 rules: who files and who registers
In August 2026 the UAE filled the gaps that Article 15 had left open. Ministerial Decision No. 133 of 2026, reported by Gulf News on 26 August 2026, specifies three categories of entity that must file the Pillar Two Information Return with the Federal Tax Authority:
- each constituent entity located in the UAE, other than an investment entity;
- each joint venture and JV subsidiary located in the UAE; and
- each stateless constituent entity that is a reverse hybrid entity created under UAE law.
As Regfollower's summary of the decision notes, an entity may file directly or through a Designated Local Entity acting for it, and the decision applies to fiscal years starting on or after 1 January 2025. The decision does not create a new tax: it names the filers for the regime that already exists.
Registration runs on a separate track. FTA Decision No. 12 of 2026, issued on 16 July 2026 and published on 4 August 2026, requires in-scope entities to apply for top-up tax registration within seven months of the end of their first in-scope fiscal year. As a transitional measure, entities whose fiscal year ended before 30 April 2026 have until 30 November 2026. The decision also sets deregistration windows and a notification process for entities that are out of scope, with a notification valid for five consecutive years.
The FTA's first scope and registration guide, TTGREG1, followed in August. According to a 2 September 2026 summary, the guide confirms that registration is required even where a group expects no top-up tax because of a safe harbour, that a Domestic Designated Filing Entity can register for the group on EmaraTax, and that late registration attracts a penalty of AED 10,000 per entity. For a group with a dozen UAE entities in Dubai and Abu Dhabi, that is a material cost for an administrative miss.
Qatar: an IIR plus a domestic minimum tax, and six new decisions
Qatar has gone further than the UAE by adopting both a qualified income inclusion rule and a qualified domestic minimum top-up tax. The General Tax Authority announced the implementation of the "Global and Domestic Minimum Tax" in February 2026, and The Peninsula reported that the rules impose a 15% effective minimum rate on multinational groups with revenues above EUR 750 million, through Chapter Seven of the Income Tax Law as re-enacted.
Registration opened first. On 2 August 2026 the GTA launched a dedicated Pillar Two registration service on its Dhareeba platform. In-scope groups must register within three months of the service's activation, and for fiscal years from 2026 onwards within six months of the year end. The GTA stressed that registration is mandatory even where no top-up tax is expected.
The six decisions published on 27 August 2026 then supplied the operating detail. Deloitte's summary lists them as follows:
| GTA decision | Subject | What it does |
|---|---|---|
| No. 17 of 2026 | Currency conversion | Qatar Central Bank rates as the primary standard for IIR and DMTT, with European Central Bank rates as fallback |
| No. 18 of 2026 | Simplified reporting | Simplified reporting framework from fiscal year 2025 |
| No. 19 of 2026 | CbCR safe harbour | Top-up tax deemed zero on a de minimis, simplified ETR or routine profits test, for fiscal years beginning on or before 31 December 2027 |
| No. 20 of 2026 | Non-material entities | Calculations for non-material constituent entities |
| No. 21 of 2026 | Designated Local Entity | A Qatari entity must be appointed where the ultimate parent is not resident in Qatar; material changes notified within 60 days |
| No. 22 of 2026 | Registration | At least two authorised representatives and a nominated Qatar tax representative |
The simplified effective tax rate test in Decision No. 19 uses a transition rate of 16% for fiscal year 2025 and 17% for fiscal years 2026 and 2027, according to Deloitte. Failure to register triggers penalties under the Income Tax Law, although transitional relief under Law No. 22 of 2024 may apply. Groups with a subsidiary in Qatar should note that the Designated Local Entity appointment is a governance decision, not merely a form.
Bahrain: the first Gulf domestic minimum top-up tax
Bahrain was the first Gulf Cooperation Council state to legislate a domestic minimum top-up tax. Decree-Law No. (11) of 2024, published on 1 September 2024, applies a 15% effective rate to Bahraini constituent entities of groups with consolidated revenue above EUR 750 million in two of the last four years, for fiscal years starting on or after 1 January 2025. The National Bureau for Revenue administers it.
Bahrain's regime has two features that catch groups used to annual-only compliance. First, it front-loads registration: KPMG's February 2026 summary records that December year-end groups had to be registered by 30 January 2025, other groups within 120 days of the start of their first applicable fiscal year, and new Bahraini entities within 120 days of their activity licence. Second, it requires advance payments during the year:
- Quarterly instalments are due 60 days after each quarter, with the first and second quarters combined in the transition year.
- No advance payments are required where an entity elects an exclusion or safe harbour at registration.
- The annual return for the transition year is due 18 months after the year end, which KPMG illustrates as 30 June 2027 for a December 2025 year end, and 15 months after the year end thereafter.
KPMG also notes that master and local transfer pricing files must be maintained where intra-group transactions exist and produced on the Bureau's request. For groups in Bahrain, the domestic minimum tax is therefore also a transfer pricing documentation obligation.
Kuwait: a domestic minimum tax that replaces the old regime
Kuwait took a different route: its domestic minimum top-up tax replaces, rather than sits alongside, the taxes previously paid by in-scope multinationals. Decree-Law No. 157 of 2024, issued on 31 December 2024, applies to fiscal years starting on or after 1 January 2025 at a 15% effective rate.
EY's January 2025 alert set out the main differences from its neighbours:
- Old taxes switched off. From 2025, the 15% corporate income tax, 1% zakat and 2.5% National Labour Support Tax no longer apply to in-scope groups.
- No IIR or UTPR. Kuwait adopted only a domestic charge, which EY described at the time as a DMTT rather than a qualified DMTT.
- Deadlines. Registration within nine months of implementation, a tax return within 15 months of the end of the tax period, and records kept for ten years.
- Penalties. Between 5% and 25% of the tax for various violations, plus administrative fines of up to KWD 5,000.
In 2026 Kuwait added a voluntary cash-flow option. Ministry of Finance Circular No. 1 of 2026, effective from 29 April 2026, let taxpayers apply by 31 May 2026 to make an advance payment and file a provisional return by 30 June 2026, in exchange for priority handling of tax cards, audits, refunds and objections. The standard return for a December 2025 year end remains due on 31 March 2027. Groups operating in Kuwait should check whether their parent jurisdiction treats the Kuwaiti tax as qualified before assuming it offsets any IIR at home.
How the four Gulf domestic minimum top-up taxes compare
The four regimes share the 15% rate and the EUR 750 million threshold, but differ on the charges adopted, the paperwork and the timetable. The table below summarises the position on the sources reviewed as at 5 September 2026.
| UAE | Qatar | Bahrain | Kuwait | |
|---|---|---|---|---|
| Legal basis | Cabinet Decision No. 142 of 2024 | Income Tax Law, Chapter Seven, as amended | Decree-Law No. (11) of 2024 | Decree-Law No. 157 of 2024 |
| First fiscal years | Beginning on or after 1 January 2025 | Implementing decisions apply from 2025 | Beginning on or after 1 January 2025 | Beginning on or after 1 January 2025 |
| Charges adopted | Domestic top-up tax only | IIR and QDMTT | Domestic top-up tax | Domestic top-up tax only |
| Administrator | Federal Tax Authority (EmaraTax) | General Tax Authority (Dhareeba) | National Bureau for Revenue | Ministry of Finance |
| Local filer | Entity or Domestic Designated Filing Entity | Designated Local Entity where parent is foreign | Filing constituent entity | In-scope entity |
| Payments during the year | None: tax due with the return | Not identified in sources reviewed | Quarterly advance payments | Optional advance payment (2026) |
| Main return | 15 months (18 in first transition year) | Per GTA rules | 15 months (18 in transition year) | 15 months |
The comparison also shows what is absent. Groups with wider regional footprints, including in Saudi Arabia, should confirm each country's own position rather than assume a single Gulf model.
The side-by-side package: why US groups still pay Gulf domestic minimum taxes
The side-by-side package exempts US-parented groups from other countries' IIR and UTPR, but it does not exempt them from any country's qualified domestic minimum top-up tax. That single point explains why the Gulf rules matter to US multinationals just as much as to European or Asian ones.
As Eversheds Sutherland's analysis of the 5 January 2026 package explains, the Side-by-Side System has two safe harbours. The SbS Safe Harbour relieves groups headquartered in a "Qualified SbS Jurisdiction" from IIRs and UTPRs; so far only the US tax system has been approved, for fiscal years beginning on or after 1 January 2026. The UPE Safe Harbour relieves a parent's own jurisdiction from the UTPR. In both cases, the firm notes, the QDMTT must still be calculated in every QDMTT jurisdiction, and groups remain subject to GloBE Information Return obligations for QDMTT purposes. The package also does not apply retroactively to 2024 or 2025.
For a US group with a UAE, Qatari, Bahraini or Kuwaiti subsidiary, the practical consequences are:
- the 2025 year is fully within the Gulf rules, with no side-by-side relief;
- from 2026, relief from foreign IIRs and UTPRs does not remove the local domestic charge; and
- local registration, information returns and top-up tax returns are still required.
The side-by-side deal was the product of sustained US pressure on foreign regimes that reach American companies, a theme that has run through other disputes, from the EU General Court's Apple gatekeeper ruling to the litigation over tariff windfalls in US courts. In the Gulf, however, the local minimum tax survives it intact. US-based advisers briefing boards on the package should say so plainly.
Safe harbours that can reduce the work
Safe harbours can reduce a domestic minimum top-up tax liability to zero, but in the Gulf they do not remove the need to register. Three are most relevant for 2025 and 2026.
- The transitional CbCR safe harbour. This uses country-by-country reporting data to deem top-up tax to be zero where a de minimis, simplified effective tax rate or routine profits test is met. Eversheds reports that the side-by-side package extends it through tax years ending 30 June 2029. The UAE Cabinet Decision and Qatar's Decision No. 19 of 2026 both contain versions.
- The simplified ETR safe harbour. A permanent replacement for the transitional test, effective from 1 January 2026 under the package, intended to give relief after the transitional safe harbour ends.
- The substance-based tax incentive safe harbour. Introduced by the same package to align the treatment of qualifying tax incentives, which is relevant where Gulf free zone or investment incentives reduce the local effective rate.
The rates in the transitional test step up over time. Qatar's Decision No. 19 uses 16% for 2025 and 17% for 2026 and 2027, so a group that passed comfortably in one year may not pass in the next. Bahrain's regime rewards a safe harbour election at registration by removing the obligation to make advance payments. And in the UAE, the FTA's guide confirms that a group relying on a safe harbour must still register.
The Gulf filing calendar for 2026 and 2027
The next nine months contain the first hard deadlines for most calendar-year groups. The dates below are drawn from the sources cited in this article and assume a 31 December year end unless stated.
| Deadline | Jurisdiction | Obligation |
|---|---|---|
| Three months from 2 August 2026 | Qatar | Initial Pillar Two registration on Dhareeba |
| 30 November 2026 | UAE | Top-up tax registration for fiscal years ending before 30 April 2026 |
| 31 December 2026 | UAE | Deregistration for entities that ceased before 30 June 2026 |
| 31 March 2027 | Kuwait | DMTT return for the 2025 year |
| 30 June 2027 | UAE | First Top-up Tax Return for a 2025 transition year (18 months) |
| 30 June 2027 | Bahrain | DMTT return for the 2025 transition year |
Groups should also diarise the rolling rules: seven months after year end for UAE registration in later years, six months after year end for Qatari registration from 2026, and 60 days after each quarter for Bahraini advance payments.
Common mistakes with Gulf domestic minimum top-up taxes
The most common mistake is to assume that no tax means no filing. Every Gulf regime reviewed here requires registration or notification regardless of the expected liability, and the UAE's per-entity penalty turns that assumption into a quantifiable cost.
Other recurring errors include:
- Treating free zone status as the end of the analysis. A 0% qualifying free zone entity in the UAE can pull the jurisdictional effective rate below 15% for the whole UAE group.
- Relying on the side-by-side package too early. It does not cover 2024 or 2025, and never covers QDMTTs.
- Leaving the local filer undecided. Qatar requires a Designated Local Entity where the parent is foreign, with changes notified within 60 days; the UAE allows a Domestic Designated Filing Entity. Both need board-level decisions and local authorised representatives.
- Ignoring transaction effects. Acquisitions and disposals change group membership and can trigger registration or deregistration deadlines, which is why corporate and M&A lawyers increasingly add Pillar Two warranties to Gulf deal documents.
- Missing Bahrain's advance payments. A group that elects no safe harbour at registration takes on quarterly payment obligations.
When to bring in an adviser
A group should bring in specialist help when it has more than one Gulf entity, a low-taxed free zone company, a foreign parent that must appoint a local filer, or any doubt about whether its 2025 safe harbour tests are met. The rules are new, the portals are new and the guidance is still arriving in instalments.
The most useful support usually combines local and group perspectives: a taxation adviser in each Gulf state to handle registration and returns, and a cross-border specialist who can reconcile the local numbers with the group's GloBE Information Return and parent-country position. Finance teams may also want CFO-level advisory support on data systems, since every Gulf return draws on the same consolidated accounting data. Understanding what a domestic minimum top-up tax is, and where each Gulf version departs from the model, is now the starting point for any multinational with a presence in the region.
Frequently asked questions
What is a domestic minimum top-up tax?
A domestic minimum top-up tax is a local charge that raises a large multinational group's effective tax rate in one country to 15%. It applies to groups with revenue of at least EUR 750 million in two of the last four years, and lets that country collect the shortfall before other countries can under Pillar Two.
What is a qualified domestic minimum top-up tax?
A qualified domestic minimum top-up tax, or QDMTT, is a domestic minimum tax that the OECD Inclusive Framework accepts as equivalent to the Pillar Two model rules. Because it is credited first, it takes priority over the income inclusion rule and the undertaxed profits rule, and may unlock local safe harbours.
What is the domestic minimum top-up tax in the UAE?
The UAE levies a domestic minimum top-up tax under Cabinet Decision No. 142 of 2024 for fiscal years beginning on or after 1 January 2025. It applies to UAE entities of groups with revenue of EUR 750 million or more. The UAE has not adopted the income inclusion rule.
Who must file the UAE Pillar Two Information Return?
Under Ministerial Decision No. 133 of 2026, UAE constituent entities other than investment entities, UAE joint ventures and JV subsidiaries, and certain UAE reverse hybrid entities must file. They may file directly or through a Designated Local Entity. The return is due 15 months after the reporting fiscal year ends.
When is the UAE top-up tax registration deadline?
FTA Decision No. 12 of 2026 requires registration within seven months of the end of the first in-scope fiscal year. Entities whose fiscal year ended before 30 April 2026 have a transitional deadline of 30 November 2026. Late registration carries a penalty of AED 10,000 per entity.
Does Qatar have a global minimum tax?
Yes. Qatar applies both a qualified income inclusion rule and a qualified domestic minimum top-up tax at 15% for groups above EUR 750 million. Registration opened on the Dhareeba platform on 2 August 2026, and six implementing decisions were published in the Official Gazette on 27 August 2026.
Do US multinationals pay Gulf domestic minimum top-up taxes?
Yes. The OECD side-by-side safe harbour, available to US-parented groups from 2026, exempts them from other countries' income inclusion and undertaxed profits rules, but not from qualified domestic minimum top-up taxes. US groups must still calculate, file and pay local top-up tax in the Gulf.
Do I need to register if I expect no top-up tax?
Generally yes. Qatar's General Tax Authority says registration is mandatory even where no top-up tax is expected, and the UAE's registration guide confirms that groups relying on safe harbours must still register. Safe harbours reduce the liability, not the filing obligation.
How does Kuwait's domestic minimum top-up tax differ?
Kuwait's Decree-Law No. 157 of 2024 replaces its 15% corporate income tax, 1% zakat and 2.5% National Labour Support Tax for in-scope groups from 2025. It adopts no income inclusion rule, requires a return within 15 months of the period end, and offered an optional advance payment in 2026.
Sources
- OECD: International community agrees way forward on global minimum tax package (5 January 2026)
- OECD: New analysis on the economic impacts of the Global Minimum Tax (15 July 2026)
- Eversheds Sutherland: What a relief, OECD releases Pillar Two Side-by-Side Package
- UAE Cabinet Decision No. 142 of 2024 on the Imposition of Top-up Tax on Multinational Enterprises
- UAE Ministry of Finance: Top-up Tax
- EY: UAE issues domestic minimum top-up tax legislation
- Gulf News: UAE sets new tax reporting rules for multinational companies (26 August 2026)
- Regfollower: UAE updates requirements for filing Pillar Two Information Return (27 August 2026)
- Regfollower: UAE FTA issues registration and deregistration rules under Pillar Two top-up tax
- Stevva: FTA Top-up Tax Guide TTGREG1, UAE DMTT registration (2 September 2026)
- The Peninsula: GTA announces implementation of Global and Domestic Minimum Tax (15 February 2026)
- Future Gate: Qatar opens Pillar Two global minimum tax registration on Dhareeba platform (2 August 2026)
- Deloitte: Qatar Pillar 2, new decisions issued in the Official Gazette on 27 August 2026
- EY: Bahrain issues domestic minimum top-up tax legislation
- KPMG: Bahrain domestic minimum top-up tax compliance obligations (February 2026)
- EY: Kuwait implements domestic top-up tax on MNEs (January 2025)
- KPMG: Kuwait DMTT optional advance tax payment
About this article
This analysis was researched and written by The Corporate INTL Newsroom, which covers cross-border legal, regulatory and business developments for lawyers, professional advisers and financiers in over 150 jurisdictions. It has been checked against the text of UAE Cabinet Decision No. 142 of 2024, the OECD's announcements, and official and professional summaries of the Gulf implementing rules. The full texts of UAE Ministerial Decision No. 133 of 2026 and Qatar's six General Tax Authority decisions were not reviewed directly, and further guidance is expected. This article is general information, not legal or tax advice; for advice on a specific matter, consult a qualified adviser. Last reviewed 5 September 2026. For more analysis like this, visit the Corporate INTL newsroom or subscribe to Corporate INTL.
