Published July 8, 2025Updated January 19, 202613 min read
QDMTT: How Qualified Domestic Minimum Top-up Tax Shifts Pillar Two Top-up Tax Locally (2026)QDMTT: How Qualified Domestic Minimum Top-up Tax Shifts Pillar Two Top-up Tax Locally (2026)
A QDMTT is a Pillar Two-aligned domestic top-up tax that collects the 15% minimum tax locally—often eliminating foreign IIR/UTPR top-up tax.
Borys UlanenkoCEO of ArmsLength AI
13min read
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Contents
TL;DR key takeaways
QDMTT is the host-country’s Pillar Two domestic top-up tax that collects the 15% minimum tax locally—often eliminating residual foreign top-up tax via the Article 5.2.3 domestic top-up tax reduction.
“Qualified” requires functional equivalence to GloBE—design + outcomes must not be systematically lower than GloBE.
The QDMTT safe harbour can deem a jurisdiction’s GloBE top-up tax to be zero, but only if safe harbour standards are met, a safe harbour election is made, and QDMTT is actually payable.
QDMTT changes cash-tax geography: the same 15% minimum tax may be paid locally instead of at the parent (IIR) or allocating jurisdictions (UTPR).
EU Public CbCR requires large groups to publish income-tax KPIs by jurisdiction. Most calendar-year groups first report FY2025 and publish by 31 Dec 2026.
A QDMTT (Qualified Domestic Minimum Top-up Tax) is a Pillar Two-aligned domestic top-up tax designed to be functionally equivalent to the OECD GloBE rules and to collect the incremental tax up to 15% in the source (host) jurisdiction. In the GloBE computation, the QDMTT payable reduces the jurisdictional top-up tax through the Article 5.2.3 Jurisdictional Top-up Tax formula (which subtracts “Domestic Top-up Tax,” defined as the amount payable under a QDMTT for the year). If the domestic regime is not treated as a QDMTT, an MNE can face either (i) residual foreign top-up tax (IIR/UTPR) and/or (ii) duplicative complexity, depending on whether and how the domestic minimum tax is treated under the Covered Taxes rules.
Key Takeaways
→QDMTT is how host jurisdictions “keep” Pillar Two top-up tax that would otherwise be collected under a parent’s IIR (and ultimately UTPR).
→Qualification is a functional-equivalence test: architecture + outcomes must align with GloBE and must not be systematically lower than GloBE (OECD Feb 2023 Admin Guidance).
→The QDMTT safe harbour can significantly reduce duplicated computations, but it hinges on (i) meeting safe harbour standards, (ii) making the safe harbour election, and (iii) having QDMTT that is actually payable (OECD July 2023 Admin Guidance).
What is a QDMTT (and why it exists)
A Qualified Domestic Minimum Top-up Tax (QDMTT) is the “host country version” of Pillar Two: a domestic tax that aims to replicate the GloBE jurisdictional ETR mechanics and charge a top-up when the jurisdiction’s effective tax rate is below 15%.
Why countries are implementing QDMTTs
QDMTTs are largely about taxing rights and cash tax location:
Without a QDMTT, low-taxed profits in a jurisdiction can generate a top-up tax collected by another country under the Income Inclusion Rule (IIR)—typically the parent’s jurisdiction—and potentially backed up by the Undertaxed Profits Rule (UTPR).
With a QDMTT, the host jurisdiction collects the incremental tax first, and the GloBE calculation reduces the jurisdictional top-up tax by the domestic amount payable under the QDMTT (OECD Model Rules, Art. 5.2.3; OECD Consolidated Commentary (2025), discussion of Domestic Top-up Tax mechanics).
This is why, in practice, QDMTTs often change the question from “Will there be a Pillar Two top-up tax?” to “Where will the top-up tax be paid—locally, at the parent, or via UTPR allocations?”
Practitioners often describe QDMTT as having “priority.” Technically, the “priority” is achieved through the ordering embedded in the GloBE computation, not through a standalone priority clause.
The practical ordering (what happens in the math)
At a high level:
Compute the jurisdictional ETR, Excess Profits, and Top-up Tax % under the GloBE rules.
Compute the Jurisdictional Top-up Tax under Article 5.2.3, which (among other items) subtracts Domestic Top-up Tax—defined as the amount payable under a QDMTT for the same fiscal year.
Only the residual top-up tax (if any) is then available to be collected under IIR and, if still not picked up, via UTPR allocations.
Why “payable” matters
The OECD guidance distinguishes between amounts that exist in a statute and amounts that are actually payable for the year. In practice, regimes and fact patterns can produce an amount that is:
accrued in accounting,
assessed by the tax authority,
under dispute or not collectible,
ultimately payable.
As a practical rule of thumb: “payable” often follows the year’s accrual/assessment mechanics, but OECD guidance flags that amounts that are subject to challenge or deemed not assessable/collectible can be treated as not payable for these purposes (see OECD July 2023 guidance’s discussion linking safe harbour eligibility to “QDMTT payable” under Art. 5.2.3).
Warning
If a QDMTT amount is materially uncertain (e.g., under formal dispute or not assessable/collectible), you can end up with a “gap year” where the group cannot fully rely on the domestic reduction or safe harbour—creating residual IIR/UTPR exposure until the domestic position stabilizes.
No negative top-up tax (no refund mechanism in GloBE)
Even if the domestic system collects more than the GloBE-computed top-up tax, the GloBE mechanics do not create a negative jurisdictional top-up tax or a refund through the GloBE system (OECD Consolidated Commentary (2025), treatment of Domestic Top-up Tax mechanics and the floor at zero).
What makes a domestic minimum tax “qualified”
Not every domestic minimum tax is a QDMTT. The OECD frames qualification as functional equivalence (OECD Feb 2023 Agreed Administrative Guidance).
The two-part test: architecture + outcomes
A domestic regime is generally expected to be “qualified” when:
Architecture/design consistency: it determines excess profits and incremental tax using mechanisms that track GloBE’s core building blocks (GloBE income base logic, covered tax concepts, jurisdictional blending, SBIE-style exclusion, etc.).
Outcome consistency: it must not systematically produce an incremental liability that is lower than the GloBE outcome for that jurisdiction (OECD Feb 2023 Agreed Administrative Guidance).
In other words, “qualified” is not about copying the GloBE text line-by-line—it’s about reliably producing a GloBE-consistent result for in-scope MNEs.
One more qualification constraint: no “benefits” tied to the GloBE/QDMTT rules
In addition to architecture + outcomes, the OECD’s definition-level guidance highlights another high-level constraint: a QDMTT must be implemented and administered consistently with GloBE provided that the jurisdiction does not provide any benefits that are related to the GloBE Rules (OECD Feb 2023 Agreed Administrative Guidance, QDMTT definition commentary).
This matters in practice because it pushes jurisdictions away from designs that “give back” QDMTT through direct or indirect relief linked to the minimum-tax computation.
Scope expectations (who must be covered)
A QDMTT must, at minimum, operate correctly for in-scope groups (typically consolidated revenue ≥ €750m in at least 2 of the prior 4 years, under the GloBE scope framework). OECD guidance also contemplates that jurisdictions may choose to apply a domestic top-up tax more broadly (e.g., to smaller groups) without breaking qualification—provided the regime still functions appropriately for in-scope MNEs (OECD Feb 2023 Agreed Administrative Guidance).
QDMTT vs “regular” domestic minimum tax (DMT)
Many jurisdictions had minimum taxes before Pillar Two (or are introducing “minimum tax” concepts that are not GloBE-aligned). Those taxes can be valuable domestically, but they can fail the QDMTT test.
Feature
QDMTT (Qualified Domestic Minimum Top-up Tax)
Typical non-qualified domestic minimum tax
Blending level
Jurisdictional (tracks GloBE approach)
Often entity-level or based on local tax groupings
Income base
GloBE-like (financial accounting base + GloBE adjustments)
Often local taxable income or bespoke accounting profit base
Goal
Bring ETR to 15% in a GloBE-consistent way
Ensure a minimum local tax take (not necessarily aligned to GloBE)
Interaction with IIR/UTPR
Reduces jurisdictional top-up tax via the Art. 5.2.3 Domestic Top-up Tax subtraction (often eliminating residual top-up)
May not reduce jurisdictional top-up tax as “Domestic Top-up Tax”; may still leave residual top-up (and can create multi-layer outcomes in narrow cases)
Qualification risk
Assessed against functional equivalence + “no related benefits” constraint (OECD Feb 2023 Guidance)
Higher risk of failing functional equivalence
Warning
Model carefully: under the OECD Model Rules, QDMTT itself is excluded from Covered Taxes, but other domestic taxes (even “minimum taxes”) may still be Covered Taxes if they meet the Article 4.2 definition. Don’t conflate “not a QDMTT” with “doesn’t affect the GloBE ETR.”
Tip
When reviewing a jurisdiction’s “minimum tax,” ask one operational question first: “Will it be treated as a QDMTT payable in the GloBE computation?” If the answer is unclear, model both (i) the Art. 5.2.3 Domestic Top-up Tax subtraction case and (ii) the “Covered Taxes only” case.
The QDMTT safe harbour: what it is and when it helps
The QDMTT safe harbour is intended to reduce duplicated work. If the safe harbour applies, the MNE can treat the jurisdiction’s GloBE top-up tax as deemed zero (OECD July 2023 Administrative Guidance).
What the safe harbour does (and doesn’t do)
Does: allow a simplified outcome for the GloBE computation—top-up tax in that jurisdiction is deemed 0 when conditions are met.
Doesn’t: eliminate the need to comply with the domestic QDMTT return/payment rules.
Critically, the OECD July 2023 guidance describes the QDMTT Safe Harbour as an election made by the Filing Constituent Entity (not an automatic switch).
The three safe harbour standards (high-level)
OECD July 2023 Administrative Guidance outlines safe harbour standards that, in practice, are usually summarized as:
Standard
What it aims to ensure
Practical implication for MNEs
Accounting standard
QDMTT uses appropriate accounting basis aligned with GloBE objectives
Data model should start from the UPE consolidation standard where feasible
Consistency standard
QDMTT computation is consistent with GloBE outcomes
Watch for local deviations (credits, incentives, carryforwards) that distort outcomes
Administration standard
Compliance and administration are robust and transparent
Track filing, payment, audit and dispute mechanics; “payable” is critical
Warning
Safe harbour eligibility is not the same as “the country has a QDMTT statute.” It depends on whether the regime meets the safe harbour standards and whether the group can validly elect the safe harbour. Under OECD July 2023 guidance, you generally cannot elect the QDMTT Safe Harbour if the QDMTT liability is subject to challenge or deemed not assessable such that it would not be treated as “QDMTT payable” under Art. 5.2.3.
How safe harbour changes your compliance footprint
Without the safe harbour, many groups end up effectively doing two computations for the same jurisdiction:
a local QDMTT computation to file and pay domestically, and
a full GloBE computation to support IIR/UTPR and the GloBE Information Return.
With the safe harbour, you still do (1), but (2) can often be simplified for that jurisdiction (subject to each implementing jurisdiction’s mechanics and the OECD guidance framework).
Where QDMTTs are in effect (practical snapshot as of 2025)
A single “official global list” is not embedded in the OECD Model Rules. However, there is now an OECD-maintained reference point for transitional qualified status outcomes.
OECD Central Record (transitional qualified status + safe harbour status)
The OECD publishes a Central Record of Legislation with Transitional Qualified Status, including a table for “Qualified Domestic Minimum Top-up Tax Rules and QDMTT Safe Harbours.” The OECD page notes the central record is current as at 18 August 2025 and is updated periodically after jurisdictions complete the transitional qualification mechanism process.
Two practical takeaways:
Use it as the closest thing to an “official” reference for transitional qualified status and safe-harbour table outcomes.
Don’t misread omissions: the OECD explicitly notes that a jurisdiction not appearing in the central record does not mean its rules are not qualified—only that the transitional process may not have been initiated or completed at the publication date.
A tiered way to track “status” in practice
Because “status” has multiple layers, a practical hierarchy is:
OECD Central Record (transitional qualified status + QDMTT Safe Harbour table outcomes),
Local government / tax authority guidance (effective dates, filing/payment mechanics),
Country lists used for specific domestic purposes (e.g., UK HMRC recognition lists).
Selected effective-date groupings (illustrative)
For practical purposes, many practitioners also reference the UK HMRC manual list of qualifying domestic top-up taxes and effective dates (noting HMRC is a UK recognition list, and “effective” dates are typically expressed as applicable for fiscal years beginning on/after the listed date).
Based on HMRC’s running list (accessed Dec 2025):
Effective date (as listed by HMRC)
Examples of jurisdictions with QDMTTs
31 Dec 2023
Many EU Member States, UK, Canada
1 Jan 2024
Australia, Norway, Switzerland, South Africa, others
1 Jan 2025
UAE, Singapore, Malaysia, Indonesia, Brazil, others
Future noted
Japan (1 Apr 2026)
Note
HMRC’s page maintains separate lists for (i) “Pillar Two territories” and (ii) “qualifying domestic top-up taxes (QDMTTs).” That distinction matters: for example, a jurisdiction can be listed as having a QDMTT effective from one date while its broader Pillar Two territory status (e.g., IIR) has a different effective date.
Note
For EU groups, QDMTT implementation is shaped by the Minimum Tax Directive (Council Directive (EU) 2022/2523), which explicitly permits a qualified domestic top-up tax option and aligns member state frameworks.
“Implemented” vs “qualified” vs “safe-harbour eligible”
These terms are often conflated:
Implemented: the law exists domestically.
Qualified (QDMTT): the regime is treated as functionally equivalent for Pillar Two purposes (OECD guidance).
Safe-harbour eligible: the regime meets additional safe harbour standards and is recognized through the relevant processes contemplated in OECD July 2023 guidance.
Practically, your risk assessment should track all three dimensions—especially in year 1–2 of adoption in each jurisdiction.
Strategic implications for MNEs: planning, incentives, and cash tax geography
QDMTT is not just another filing. It changes where incremental tax is paid and therefore affects treasury, forecasting, transfer pricing operating models, and incentive strategy.
1) Cash tax moves from parent jurisdiction to host jurisdiction
Under IIR-only structures, low-taxed profits often generate top-up tax at the parent. With QDMTT, the same incremental tax can be collected locally.
This can affect:
cash pooling and withholding considerations,
local statutory effective tax rate and deferred tax positions,
internal tax charge models between entities (who bears the cost of minimum tax).
2) Incentive regimes may deliver less value (or require redesign)
Many traditional incentives reduce local tax below 15% (holidays, free zones, preferential IP regimes). Under QDMTT, the benefit can be partially or fully offset by domestic top-up tax to reach the 15% minimum.
In some cases, jurisdictions respond by pivoting toward:
incentives structured to be Pillar Two compatible (e.g., certain refundable credit designs), or
non-tax subsidies.
The key point for practitioners: re-evaluate incentives using GloBE/QDMTT economics, not purely local ETR optics (OECD Feb 2023 Admin Guidance discusses the importance of outcomes not being systematically lower).
3) “Double-layer” risk is real—but narrower than many first-pass models
It’s true that a domestic minimum tax that is not treated as QDMTT can leave residual IIR/UTPR exposure.
But it is not technically reliable to assume “not QDMTT” automatically means “GloBE top-up is unchanged,” because a non-QDMTT domestic minimum tax may still be a Covered Tax (and therefore increase Adjusted Covered Taxes / ETR, reducing the GloBE top-up tax).
The double-layer risk is most acute in narrower fact patterns (e.g., the levy is not a Covered Tax for GloBE; base/timing differences mean it doesn’t raise ETR enough; or uncertainty/dispute mechanics prevent it from being treated as payable/included in the relevant way).
4) Increased importance of controversy governance
Because “QDMTT payable” matters, dispute outcomes and payment finality can affect both:
the amount subtracted in the Jurisdictional Top-up Tax computation (Model Rules Art. 5.2.3), and
safe harbour eligibility (OECD July 2023 Guidance).
Decision Criteria
01Use a jurisdiction tracker that flags: (i) QDMTT enacted, (ii) OECD transitional qualified status signals (Central Record), (iii) safe harbour availability, (iv) payable vs disputed amounts.
02Model year-1 uncertainty scenarios (e.g., audit adjustments or disputes) to quantify potential residual IIR/UTPR exposure even when a QDMTT exists.
03Reassess tax incentive ROI based on post-QDMTT cash tax, not just local statutory tax savings.
Step 2 — Apply Domestic Top-up Tax (QDMTT payable) in the Art. 5.2.3 formula
Assume Jurisdiction A has a QDMTT and the amount payable for FY2025 is 5.
text
Residual Jurisdictional Top-up Tax = 5 − 5 = 0
Result
Jurisdiction A collects 5 domestically.
Under the GloBE computation, there is no residual top-up tax for IIR/UTPR for that jurisdiction (subject to the QDMTT being treated as payable and “qualified”).
Example 2: Domestic minimum tax is not “qualified” → outcomes depend on Covered Taxes treatment
The risk with “not QDMTT” is often modeled too aggressively. Here are two common patterns:
Case A — Non-QDMTT domestic minimum tax is still a Covered Tax → GloBE top-up may fall (even to zero)
Facts (Jurisdiction B, FY2025)
GloBE Income: 100
“Regular” Covered Taxes (e.g., corporate income tax): 10
A domestic minimum tax of 5 is imposed, and (critically) it is a tax recorded with respect to income or profits so it can be a Covered Tax under the Article 4.2 definition (even if it is not treated as QDMTT payable under Art. 5.2.3).
Foreign IIR/UTPR top-up tax may be 0, because the domestic tax increased Covered Taxes and raised the GloBE ETR to 15%.
So what’s the Pillar Two problem here?
Typically: loss of QDMTT safe harbour simplifications, additional reconciliation/uncertainty work, and a higher risk that local design choices create differences vs GloBE in other years or other profiles—rather than an automatic “double cash tax” equal to the full GloBE top-up.
Case B — Domestic minimum tax is not a Covered Tax (or doesn’t raise ETR enough) → “domestic + foreign” layering becomes plausible
Facts (Jurisdiction B, FY2025)
GloBE Income: 100
Covered Taxes (as defined for GloBE): 10
The jurisdiction imposes an additional domestic levy of 5, but assume this levy is not treated as a Covered Tax for GloBE purposes (e.g., it is not a tax “with respect to income or profits” within the Article 4.2 concept, or it is not recorded/treated in a way that brings it into Adjusted Covered Taxes for the year).
Because it is not a QDMTT, it also does not reduce Jurisdictional Top-up Tax as “Domestic Top-up Tax” under Art. 5.2.3.
The practical takeaway is still that qualification analysis is not academic—but the “10” result is fact-pattern dependent and should not be used as the default assumption.
Example 3: QDMTT exceeds GloBE top-up tax — no negative top-up tax
If Jurisdiction C’s QDMTT computes 4.0 payable for FY2025:
text
Residual Top-up Tax = max(0, 3.2 − 4.0) = 0
Result
The “excess” 0.8 does not create a negative top-up tax in the GloBE computation (OECD Consolidated Commentary (2025) on Domestic Top-up Tax mechanics and the floor at zero).
For modeling, do not treat QDMTT as a refundable GloBE asset—treat it as a reduction capped at the jurisdictional top-up tax.
Compliance: a practical operating model for QDMTT + GloBE
For most groups, QDMTT increases the number of jurisdictions where Pillar Two is “real” locally (filing, payment, controversy). The best compliance models minimize duplication.
Step-by-step: what to build and control
Determine scope
Revenue threshold and whether the group is in-scope (typical Pillar Two threshold: €750m, per GloBE scope framework).
Identify excluded entities, permanent establishments, and local filing units.
Build jurisdiction-level Pillar Two data
financial accounting net income (consistent basis),
GloBE adjustments,
current and deferred covered taxes and attributes,
understand local filing mechanics, deadlines, payment dates, penalties,
track whether amounts are payable vs disputed.
Compute residual GloBE (IIR/UTPR) and file the GIR
apply safe harbours where available (including the QDMTT Safe Harbour election where eligible),
complete reporting per the GloBE Information Return framework.
Note
If you’re building compliance processes around the OECD GIR: the January 2025 GIR version incorporates clarifications on completing the return and reflects later OECD Administrative Guidance releases (including December 2023 and June 2024), so it’s worth aligning your reporting templates to that “post-guidance” shape.
Tip
Treat QDMTT as a first-class data product: build a single “Pillar Two dataset” that can serve (i) local QDMTT, (ii) parent-level IIR/UTPR, and (iii) GIR reporting—then map local deviations on top.
Common pitfalls (and how to avoid them)
Common Pitfalls to Avoid
01Using local GAAP-only numbers for QDMTT when the regime or safe harbour expectations effectively assume UPE consolidated accounting alignment—driving duplicated reconciliations (OECD July 2023 Admin Guidance).
02Not distinguishing QDMTT accrued vs QDMTT payable (and not controlling disputed amounts), which can undermine both Art. 5.2.3 mechanics and safe harbour positions (OECD Consolidated Commentary (2025); OECD July 2023 Guidance).
03Under-modeling non-QDMTT domestic minimum taxes by assuming they never affect the GloBE ETR—even though many such taxes may still be Covered Taxes under Article 4.2—leading to overstated 'double layer' projections.
04Under-modeling partial ownership / JV structures where charging mechanics and elections can diverge, creating unexpected residual top-up tax or reporting complexity.
Related topics and next steps
Pillar Two overview and mechanics: /resources/pillar-two-guide
Global minimum tax context and how it fits with transfer pricing: /resources/global-minimum-tax-guide
UTPR (when QDMTT and IIR don’t fully eliminate exposure): /resources/utpr-guide
Hub for Pillar Two + CbCR integration and readiness: /resources/pillar-two-cbcr-guide
Teams that operationalize QDMTT with a single, controlled Pillar Two dataset typically reduce rework across local filings, parent computations, and GIR reporting—and they spot “not qualified / not payable” issues early enough to manage cash tax surprises.
QDMTT stands for Qualified Domestic Minimum Top-up Tax—a domestic tax intended to be treated as functionally equivalent to the OECD GloBE rules.
2) Why are countries introducing QDMTTs?
To collect the top-up tax locally (up to the 15% minimum) instead of allowing another jurisdiction to collect it under the IIR, with UTPR as the backstop.
3) How does QDMTT interact with IIR and UTPR?
Under the OECD Model Rules, the Jurisdictional Top-up Tax calculation (Art. 5.2.3) subtracts Domestic Top-up Tax, defined as the QDMTT payable for the year. This often reduces residual top-up tax for that jurisdiction to zero before IIR/UTPR applies.
4) What makes a domestic minimum tax “qualified”?
It must be functionally equivalent to GloBE in both design (architecture) and outcomes, it must not be structured in a way that produces outcomes systematically lower than GloBE, and it must not provide benefits related to the GloBE rules (OECD Feb 2023 Agreed Administrative Guidance).
5) What is the QDMTT safe harbour?
A mechanism under which an MNE may treat a jurisdiction’s GloBE top-up tax as deemed zero when that jurisdiction has a QDMTT meeting the safe harbour standards and the Filing Constituent Entity makes the election (OECD July 2023 Administrative Guidance).
6) Does paying a domestic minimum tax always eliminate foreign Pillar Two tax?
No. Only a tax treated as QDMTT payable for the year (and “qualified” under the OECD framework) will generally reduce residual top-up tax via Art. 5.2.3. Also, a non-QDMTT domestic minimum tax may still affect GloBE results if it is included in Covered Taxes—so you need to model both the Art. 5.2.3 and Article 4.2 pathways.
7) Can QDMTT create a negative top-up tax or refund under GloBE?
No. In the GloBE computation, the Domestic Top-up Tax subtraction is effectively capped so the jurisdictional top-up tax does not go below zero (OECD Consolidated Commentary (2025) on Art. 5.2.3 mechanics).
8) How do disputes affect QDMTT crediting and safe harbour?
If the amount is not treated as payable (e.g., under challenge or deemed not assessable/collectible), it can reduce the availability of the Domestic Top-up Tax subtraction and can also block reliance on the QDMTT safe harbour election (OECD July 2023 Guidance; OECD Consolidated Commentary (2025)).
9) Where can I find a practical list of countries with QDMTTs and effective dates?
Two useful references (for different purposes) are:
The OECD Central Record of Legislation with Transitional Qualified Status (closest thing to an “official” transitional-status tracker).
The UK HMRC manual list of qualifying domestic top-up taxes and effective dates (UK recognition list): https://www.gov.uk/hmrc-internal-manuals/multinational-top-up-tax-and-domestic-top-up-tax/mtt09970
10) What’s the most efficient way to manage QDMTT compliance across multiple countries?
Centralize Pillar Two data (aligned to the UPE consolidation standard where feasible), compute local QDMTT and residual GloBE from the same dataset, and integrate GIR reporting controls using the OECD GloBE Information Return framework (OECD GIR, Jan 2025).
Borys UlanenkoCEO of ArmsLength AI
