Pillar Two: A Practical Guide to the OECD 15% Global Minimum Tax (2026)Pillar Two: A Practical Guide to the OECD 15% Global Minimum Tax (2026)
Pillar Two applies a 15% minimum tax per jurisdiction for €750m+ groups using standardized GloBE income and covered taxes—often changing the value of incentives.
Borys UlanenkoCEO of ArmsLength AI
20min read
Contents↓
Contents
TL;DR key takeaways
Pillar Two tests a 15% minimum ETR jurisdiction-by-jurisdiction and charges a top-up tax when ETR is below 15%.
Scope generally starts at €750m consolidated revenue in at least 2 of the prior 4 fiscal years.
Rule order matters: QDMTT first, then IIR, then UTPR—subject to 'qualified' status and safe harbours.
Transitional CbCR safe harbours can eliminate full GloBE calculations for low-risk jurisdictions if thresholds are met.
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.
Pillar Two (the OECD GloBE rules) imposes a 15% minimum effective tax rate (ETR) tested jurisdiction-by-jurisdiction for large multinational groups. If a jurisdiction’s Pillar Two ETR is below 15%, the rules compute a top-up tax on that jurisdiction’s “excess profit” (after the substance-based income exclusion), collected through a rule design that (in general) prioritizes domestic collection and then parent-level collection: QDMTT → IIR → UTPR, subject to qualified status, local implementation choices, and safe harbours. Transitional safe harbours can significantly reduce compliance where Country-by-Country Reporting (CbCR) and financial statement data indicate low risk (OECD Safe Harbours and Penalty Relief, 2022). (oecd.org)
Pillar Two in plain terms: what it is and what it changes
Pillar Two is often described as a “15% global minimum tax,” but operationally it is a standardized minimum tax calculation that can produce incremental tax even when local statutory rates exceed 15%, and can produce no incremental tax in a low-tax jurisdiction if the group meets safe harbours or has sufficient substance carve-outs.
The core mechanic: a jurisdictional ETR test and top-up tax
At a high level, Pillar Two works like this (GloBE Model Rules, Arts. 5.1–5.3):
Compute GloBE Income (or Loss) for each constituent entity using financial accounting income as a starting point, plus specific adjustments (Chapter 3).
Compute Adjusted Covered Taxes for each entity (current tax plus specified deferred tax components, with adjustments) (Chapter 4).
Aggregate income and taxes by jurisdiction (jurisdictional blending).
Calculate a jurisdictional Pillar Two ETR.
If ETR < 15%, compute a top-up tax on excess profit (after the SBIE carve-out), plus any Additional Current Top-up Tax items that apply under the Model Rules (Art. 5.4). (oecd.org)
Collect the top-up tax using a rule design that prioritizes domestic collection and then parent-level collection (subject to “qualified” status and local rules).
Note
Pillar Two is not a single “global tax.” It is a coordinated set of domestic rules (often via an EU directive or national legislation) based on an OECD model, with outcomes heavily dependent on whether a jurisdiction’s rules are treated as qualified by other countries.
Key Pillar Two terms practitioners use (and what they mean)
Term
Practical meaning
Where defined
Minimum Rate
Fixed at 15%
GloBE Model Rules, Art. 5.1
Jurisdictional blending
Taxes and income are blended within a jurisdiction, not globally
GloBE Model Rules, Arts. 5.1–5.2
GloBE Income
Financial accounting net income (consolidation standard) plus Pillar Two adjustments
GloBE Model Rules, Chapter 3
Adjusted Covered Taxes
Current + eligible deferred taxes, adjusted under detailed rules
GloBE Model Rules, Chapter 4
SBIE
Carve-out for a fixed return on payroll and tangible assets
GloBE Model Rules, Art. 5.3
Top-up tax
Incremental tax to bring jurisdictional ETR up to 15% (applied to excess profit)
GloBE Model Rules, Art. 5.2
Pillar Two scope: the €750m threshold and common exclusions
The €750m revenue threshold (and the “2 of 4 years” test)
As a starting point, a group is generally in scope if the UPE’s consolidated financial statements show €750m or more of revenue in at least two of the four fiscal years immediately preceding the tested year (GloBE Model Rules, Arts. 1.1–1.2). This structure is familiar to CbCR teams because it aligns conceptually with the CbCR threshold, but Pillar Two scoping must still be validated against Pillar Two definitions and local implementation.
Excluded entities (don’t assume your group is fully in)
The Model Rules exclude certain categories such as governmental entities, international organizations, non-profits, pension funds, and certain investment and real estate vehicles—often with additional conditions around ownership chains and activities (GloBE Model Rules, Art. 1.5).
Tip
Treat “excluded entities” as a mapping exercise, not a label. Many groups have excluded entities and non-excluded entities in the same jurisdiction; Pillar Two still applies to the in-scope constituent entities.
A practical scoping workflow (what to do in week 1)
Confirm the revenue test using audited consolidated revenue for the last four fiscal years.
Build an entity universe and tag:
constituent entities (in scope),
excluded entities,
permanent establishments (if relevant in your implementation).
Identify the UPE and any intermediate parent entities, because this affects IIR collection and filing.
Create a jurisdiction list (where you have entities/PEs), because Pillar Two is jurisdiction-based.
Decision Criteria
01If your group is near €750m, run a 4-year rolling revenue test and document the conclusion (including FX and consolidation treatment).
02If you have funds/RE vehicles/pension structures, confirm excluded-entity eligibility under the Model Rules and local law—don’t rely on accounting labels alone.
03If you operate in multiple EU countries, plan for directive-driven filings even if your UPE is outside the EU.
Pillar Two rule order: QDMTT, IIR, and UTPR (and why “qualified” status drives outcomes)
Rule order is where Pillar Two becomes operationally “real.” Two groups with identical numbers can end up paying the same top-up tax amount, but to different governments, depending on:
whether the low-tax jurisdiction has a QDMTT (and whether it is treated as qualified),
whether the parent jurisdiction has implemented a qualified IIR,
when the UTPR becomes effective in countries where the group operates,
and whether safe harbours switch off calculations.
QDMTT: domestic minimum top-up (designed to be primary)
A Qualified Domestic Minimum Top-up Tax (QDMTT) is a domestic regime designed so the source jurisdiction collects the top-up tax on its low-taxed profits before other countries do.
Conceptually:
The jurisdiction computes a Pillar Two-like result domestically.
If treated as qualified, the QDMTT generally reduces or eliminates the residual top-up tax that would otherwise be collected under IIR/UTPR for that same jurisdictional low-tax outcome (so “the same low-tax result” is not taxed twice under the coordinated system).
Internal deep dive: see /resources/qdmtt-guide and glossary /glossary/qdmtt.
IIR: the primary charging rule at the parent level
The Income Inclusion Rule (IIR) is the parent-level rule that picks up residual top-up tax on low-taxed income of controlled entities (GloBE Model Rules, Chapter 2). When a qualified IIR applies, it typically collects top-up tax up the ownership chain.
Internal deep dive: /resources/income-inclusion-rule-guide.
UTPR: the backstop when IIR does not fully collect
The Undertaxed Profits Rule (UTPR) is intended as a backstop if top-up tax is not collected under an IIR. UTPR generally allocates residual top-up tax to jurisdictions where the group has entities, commonly using a formula based on employees and tangible assets (high level).
Internal deep dive: /resources/utpr-guide and glossary /glossary/utpr.
Tip
Planning point that teams miss: the Model Rules include an “initial phase of international activity” UTPR exclusion (Art. 9.3) for certain groups—broadly, where the group has entities in no more than six jurisdictions and has ≤ €50m of tangible assets outside its “reference jurisdiction,” for a limited period (and with timing linked to when UTPR comes into effect). (oecd.org)
The practical order of application (what most teams model)
Most operational models implement a priority logic rather than assuming every statute follows an identical mechanical sequence:
Domestic top-up (QDMTT) may reduce/eliminate the jurisdiction’s residual top-up exposure if it is treated as “qualified” by other implementing jurisdictions.
IIR is designed to have priority over UTPR in the charging framework.
UTPR applies as a backstop where IIR does not apply or does not fully collect.
Note
The OECD maintains a “Central Record” of legislation with transitional qualified status. Two practical cautions:
It is explicitly described as “current as at” its last update date, and updated over time. (oecd.org)
The OECD notes that absence from the record does not mean “not qualified”—it can also mean the transitional process has not been initiated or completed. (oecd.org)
Mechanism comparison table (who pays, who collects, what it replaces)
Mechanism
Who typically pays?
Who collects?
What problem it addresses
QDMTT
Local constituent entities (or per local design)
The low-tax jurisdiction
Seeks to ensure domestic collection before foreign collection (subject to qualified status / recognition)
IIR
Parent entity(ies)
Parent jurisdiction(s)
Collects top-up tax on low-taxed subsidiaries when a qualified parent rule applies
UTPR
Constituent entities in implementing jurisdictions
Those jurisdictions
Backstops cases where IIR doesn’t apply or doesn’t fully collect
Warning
Rule-order errors are a common cause of “phantom top-up” forecasts (e.g., forecasting UTPR exposure while ignoring an effective/recognized QDMTT). Build your model so QDMTT recognition, IIR priority, and UTPR backstop logic are enforced jurisdiction-by-jurisdiction.
Pillar Two calculations: how GloBE income, covered taxes, and ETR actually fit together
The Pillar Two computation is accounting-based, but it is not the same as the consolidated tax note and not the same as local current tax. The key is to treat Pillar Two as its own calculation framework, anchored in financial reporting data but governed by detailed definitions (GloBE Model Rules, Chapters 3–5).
The jurisdictional ETR formula (the “heartbeat” of Pillar Two)
GloBE Model Rules Art. 5.1 defines the jurisdictional ETR as:
text
Jurisdictional ETR = (Σ Adjusted Covered Taxes in the jurisdiction) / (Net GloBE Income in the jurisdiction)
If the jurisdictional ETR is below 15%, the top-up percentage is:
text
Top-up % = 15% − Jurisdictional ETR
Top-up tax is then computed under the Model Rules’ structure in Art. 5.2, based on:
Excess Profit (Net GloBE Income reduced by SBIE), and
potential Additional Current Top-up Tax items (Art. 5.4), and
interaction with a Qualified Domestic Minimum Top-up Tax (QDMTT) through the Model Rules’ “Domestic Top-up Tax” concept (Art. 5.2 framework). (oecd.org)
A practitioner-friendly simplification (still incomplete, but structurally aligned) is:
text
Excess Profit = Net GloBE Income − SBIE
Jurisdictional Top-up Tax ≈ max(0,
(Top-up % × Excess Profit)
+ Additional Current Top-up Tax (if applicable)
− Domestic Top-up Tax under a Qualified QDMTT (if applicable)
)
Important: even where the Model Rules reference “Domestic Top-up Tax,” whether a domestic regime is treated as a qualified QDMTT (and therefore recognized cleanly by other countries for rule-order purposes) depends on implementation and the relevant qualification mechanism. (oecd.org)
Why the Pillar Two ETR differs from the accounting ETR
Even before getting into complex deferred tax mechanics, Pillar Two differs because it:
uses jurisdictional blending across all constituent entities in a jurisdiction,
has a specific definition of covered taxes (including treatment of certain deferred taxes),
uses a defined GloBE income base with adjustments,
and applies an SBIE carve-out before computing the top-up base.
Warning
Do not use the consolidated financial statement ETR (or local GAAP tax rate) as a proxy for Pillar Two ETR. The differences in tax base, covered tax definition, and blending can swing outcomes materially (GloBE Model Rules, Chapters 3–5).
A practitioner-friendly data view: what you need to compute Pillar Two
Most Pillar Two implementations fail (or run late) for data reasons, not technical reasons. At minimum, expect to map:
Entity financials (trial balances / statutory accounts mapped to consolidation)
Current tax by entity and jurisdiction
Deferred tax attributes needed for Pillar Two adjustments (implementation-specific)
Payroll costs (eligible payroll for SBIE)
Tangible asset registers (eligible asset categories and carrying values)
Ownership chain (for IIR allocation and filing)
CbCR and financial statement data (for transitional safe harbour testing)
Tip
Align Pillar Two to your financial close calendar: treat it like a “tax close” with reconciliations, controls, and an audit trail. This reduces rework when auditors or tax authorities challenge variances between filings and statutory accounts.
Pillar Two SBIE: the substance-based income exclusion (how to calculate and how it affects top-up tax)
The Substance-Based Income Exclusion (SBIE) reduces the profit subject to top-up tax by carving out a fixed return on substantive activity—measured using eligible payroll costs and eligible tangible assets (GloBE Model Rules, Art. 5.3; OECD Commentary 2025 explains the policy intent).
SBIE formula (conceptual)
SBIE is the sum of:
Payroll carve-out: a percentage of Eligible Payroll Costs
Tangible asset carve-out: a percentage of the carrying value of Eligible Tangible Assets
Transitional rates vs. “steady-state” rates
The Model Rules set steady-state rates at 5% of eligible payroll and 5% of eligible tangible assets (GloBE Model Rules, Art. 5.3). Transitional rules provide higher percentages that step down over time (GloBE Model Rules, Art. 9.2). For example:
Fiscal year (illustrative)
Payroll carve-out rate
Tangible asset carve-out rate
Source
2024
9.8%
7.8%
GloBE Model Rules, Art. 9.2
2025
9.6%
7.6%
GloBE Model Rules, Art. 9.2
Later years
Step-down schedule toward 5%
Step-down schedule toward 5%
GloBE Model Rules, Art. 9.2
Note
SBIE reduces the top-up tax base (excess profit), not the ETR itself. In low-margin jurisdictions, SBIE can eliminate excess profit even when the jurisdictional ETR is below 15%.
Common SBIE complexity points (where teams lose time)
Eligibility of payroll and asset categories under Pillar Two definitions
Treatment of leased assets and asset carrying values (accounting vs. tax registers)
Cross-border staff and shared service allocations
Interactions with reorganizations (asset transfers changing carrying values)
Pillar Two safe harbours: where CbCR data can save you months of work
Transitional safe harbours are the fastest path to a workable first-year compliance approach—especially for groups operating in many jurisdictions with modest profits and limited Pillar Two exposure.
This is also where Pillar Two connects directly to CbCR governance and data quality.
For a deeper CbCR-to-Pillar Two workflow, start with /resources/pillar-two-cbcr-guide and your operational baseline /resources/cbcr-preparation-guide.
Transitional CbCR safe harbour: what it does
The OECD transitional safe harbour uses CbCR data plus financial statement information to determine when a jurisdiction can be treated as having top-up tax = 0 for the year—meaning you can avoid a full GloBE calculation for that jurisdiction (OECD Safe Harbours and Penalty Relief, 2022).
Transition Period (when the transitional safe harbour is available)
The OECD defines a Transition Period for the Transitional CbCR Safe Harbour: it applies to fiscal years beginning on or before 31 December 2026, but not including a fiscal year that ends after 30 June 2028. (oecd.org)
In practical terms, for many calendar-year groups, that generally means the transitional safe harbour can apply to fiscal years 2024, 2025, and 2026, subject to local adoption and year-by-year eligibility.
The three common tests (and the one everyone remembers)
Safe harbours are not “set and forget.” Eligibility is year-by-year, and OECD guidance includes anti-arbitrage guardrails (e.g., targeted arrangements that would undermine safe harbour outcomes). Your documentation should show data lineage from source systems through CbCR to Pillar Two conclusions.
Tip
Avoid a common naming trap: this “de minimis” test is the Transitional CbCR Safe Harbour de minimis test. It is different from the Model Rules Art. 5.5 de minimis exclusion, which is a separate election and uses GloBE-based revenue/income concepts (not CbCR simplifications). (oecd.org)
Tip
If your CbCR is prepared late or with heavy manual adjustments, Pillar Two safe harbours will magnify those weaknesses. Treat CbCR process improvements as Pillar Two risk reduction—not just reporting hygiene.
Pillar Two implementation timeline (EU, UK, Japan, and the US posture)
Pillar Two is a “common approach” at OECD level, but compliance is driven by domestic implementation. As of late 2025, many jurisdictions have enacted or are applying IIR/QDMTT, while UTPR is phasing in.
High-level timeline snapshot (verify locally)
Jurisdiction / framework
IIR effective (typical)
QDMTT / domestic top-up
UTPR effective (typical)
Primary reference
EU
Fiscal years beginning from 31 Dec 2023
Permitted under directive / implemented nationally
Generally fiscal years beginning from 31 Dec 2024
Directive (EU) 2022/2523
UK
Periods beginning on/after 31 Dec 2023 (MTT)
Periods beginning on/after 31 Dec 2023 (DTT)
Periods beginning on/after 31 Dec 2024
UK government technical notes; HMRC guidance
Japan
Consolidated accounting years beginning on/after 1 Apr 2024
Fiscal years beginning on/after 1 Apr 2026
Fiscal years beginning on/after 1 Apr 2026
PwC Tax Summaries (Japan)
United States
No OECD Pillar Two adoption as of Dec 2025
N/A
N/A
Reuters (Jan 2025); U.S. Treasury (June 2025)
EU nuance (important): the Directive includes an election allowing certain Member States (those with no more than 12 in-scope UPEs located there) to delay application of IIR and UTPR for six consecutive fiscal years beginning from 31 Dec 2023 (Art. 50), with a related cross-border arrangement in Art. 50(2). (eur-lex.europa.eu)
EU baseline application dates: Member States apply the Directive measures for fiscal years beginning from 31 Dec 2023, and (with limited exceptions) apply UTPR-related measures for fiscal years beginning from 31 Dec 2024. (eur-lex.europa.eu)
Note
For US-headed groups: non-adoption does not eliminate exposure. If you have entities in countries applying QDMTT/UTPR, you may still face foreign top-up taxes on low-taxed jurisdictions within the group.
Filing and reporting: GIR plus local returns (example: UK timing)
The OECD has published a standardized GloBE Information Return (GIR) package (OECD GIR, January 2025). Local implementation determines:
whether you file locally or centrally,
how notifications work (including “exchange of information” approaches),
penalties and “soft landing” provisions.
The OECD has indicated that the first GIRs and notifications are expected to be due on 30 June 2026 in many first-wave scenarios (subject to domestic law). (oecd.org)
For example, UK guidance indicates reporting is due 18 months after the end of the first accounting period, and 15 months after subsequent periods. The same UK guidance also frames the process as needing a UK return plus an Information Return or an Overseas Return Notification. (gov.uk)
Note
Filing mechanics (what to distinguish in your operating model):
OECD GIR standard (common data package / schema)
Local returns (some jurisdictions require a local return even where data is aligned to the GIR)
Notifications (including “we will receive the GIR via exchange of information” concepts, where available)
Dashboards / registrations (jurisdiction-specific portals and IDs)
UK example: HMRC expects (i) registration, then (ii) submission using compatible software, and (iii) a UK submission package that includes a UK return and either an Information Return or an Overseas Return Notification. (gov.uk)
US posture (why you still model UTPR risk)
As of December 2025, the US has not adopted Pillar Two domestically. In January 2025, a presidential memorandum stated the OECD deal had “no force or effect” in the United States and directed Treasury to prepare “protective measures” in response to foreign regimes viewed as discriminatory/retaliatory. (reuters.com)
Separately, in June 2025, the U.S. Treasury published a G7 statement describing discussions of a proposed “side-by-side” approach under which U.S.-parented groups would be excluded from the IIR and UTPR in recognition of existing U.S. minimum tax rules (described as a proposed solution, not enacted Pillar Two adoption). (home.treasury.gov)
Practical examples: Pillar Two calculations with numbers (and where rule order changes the answer)
These examples are intentionally simplified to illustrate the mechanics (full compliance requires detailed Chapter 3/4 adjustments, deferred tax rules, and local law specifics).
Example 1 (FY 2024): basic top-up tax with SBIE and IIR (no QDMTT)
Result:€3.975m of top-up tax is generally collected under a qualified IIR in the parent chain (subject to ownership allocation rules) (GloBE Model Rules, Chapter 2).
Example 2 (FY 2024–2025): QDMTT eliminates residual top-up + CbCR de minimis safe harbour
Part A — QDMTT eliminates the residual top-up (rule-order effect)
Same facts as Example 1, except Jurisdiction L imposes a QDMTT that is treated as qualified, and the resulting Domestic Top-up Tax amount for FY 2024 is €4.0m.
Computed top-up (simplified): €3.975m
Domestic Top-up Tax under qualified QDMTT: €4.0m
Under the Model Rules’ structure, domestic top-up tax can reduce the jurisdictional top-up tax down to zero (not below). (oecd.org)
Result: No residual top-up tax for IIR/UTPR to collect for that jurisdiction in that year (subject to detailed rules and local implementation/qualification). Internal deep dive: /resources/qdmtt-guide.
Part B — Transitional CbCR safe harbour (de minimis example)
Facts (Jurisdiction H, FY beginning in 2025):
CbCR revenue: €8.0m
CbCR profit before tax: €0.6m
Under the Transitional CbCR Safe Harbour de minimis test, if revenue < €10m and profit before tax < €1m, top-up tax is deemed zero for the year (OECD Safe Harbours and Penalty Relief, 2022).
Result: Jurisdiction H can be treated as top-up tax = 0 under the transitional safe harbour for that year, avoiding a full GloBE computation for that jurisdiction.
Example 3 (UTPR exposure): when a non-IIR parent can still trigger top-up elsewhere
Scenario: A US-headed group (no domestic IIR as of Dec 2025) has low-tax profits in Jurisdiction L. Jurisdiction L has no QDMTT. Several countries where the group operates apply UTPR.
Facts:
Jurisdiction L net GloBE income: €200m
Jurisdiction L adjusted covered taxes: €20m → ETR = 10%
Assume SBIE reduces excess profit to €170m (simplified)
Top-up % = 15% − 10% = 5%
Residual top-up tax = 5% × 170 = €8.5m
Because there is no QDMTT and no collecting IIR at the parent level, the residual €8.5m may be allocated under UTPR to jurisdictions that have implemented UTPR.
Simplified allocation illustration (not the full rule):
Assume only two UTPR jurisdictions participate in the allocation key:
Country A share of allocation key: 60%
Country B share of allocation key: 40%
text
Country A UTPR charge ≈ 60% × 8.5 = €5.1m
Country B UTPR charge ≈ 40% × 8.5 = €3.4m
Why this matters: even without parent adoption, Pillar Two can create foreign cash tax exposure that is operationally complex (multi-country assessments, local adjustments, and potential disputes). This is why many US-headed groups prioritize (i) QDMTT mapping and (ii) safe harbour optimization early.
Internal deep dive: /resources/utpr-guide.
Pillar Two compliance: a practical readiness checklist (what strong teams do differently)
A workable Pillar Two program is less about “getting the math right once” and more about building a repeatable process that survives audits, local filings, and year-to-year change.
The minimum viable Pillar Two operating model
Rule-order matrix by jurisdiction
QDMTT / IIR / UTPR status
qualified status (where applicable)
safe harbour availability
filing owner and deadlines
Data mapping from consolidation to Pillar Two data model
Safe harbour engine
de minimis / simplified ETR / routine profits test outputs
documentation of inputs and adjustments
Full GloBE calculator for non-sheltered jurisdictions
Controls and reconciliations
tie-outs to statutory accounts, tax provision, and CbCR
Key Takeaways
→Model Pillar Two jurisdiction-by-jurisdiction; global averages can hide top-up exposure.
→Treat QDMTT/IIR/UTPR priority logic as a first-class input—rule order can change who pays and where.
→Use transitional CbCR safe harbours to triage effort, but document data lineage and eligibility annually.
Common pitfalls (and how to avoid them)
Common Pitfalls to Avoid
01Using accounting ETR as a proxy for Pillar Two ETR (covered taxes and GloBE income differ).
02Forecasting UTPR exposure without confirming QDMTT presence/qualified status in low-tax jurisdictions.
03Treating safe harbours as permanent; failing to re-test annually or failing anti-arbitrage checks.
04Underbuilding SBIE data (eligible payroll and tangible asset registers) and discovering gaps during filing.
Where transfer pricing and documentation still matter
Pillar Two is not “transfer pricing,” but it will amplify weaknesses in your existing documentation ecosystem:
CbCR inconsistencies become safe harbour risks.
Entity profitability patterns can trigger questions when GloBE results diverge from statutory reporting.
Incentives and intercompany arrangements can affect jurisdictional blending outcomes.
Benchmarking context (Pillar One vs TP workflows): /resources/benchmarking-study-guide
Key point
Teams that integrate Pillar Two into their close cycle (rather than treating it as an annual “tax project”) typically reduce first-year rework and are better positioned to defend safe harbour positions and QDMTT/IIR ordering decisions.
Related topics (Pillar Two cluster and glossary)
Pillar Two + CbCR hub: /resources/pillar-two-cbcr-guide
Related guides:
QDMTT deep dive: /resources/qdmtt-guide
UTPR deep dive: /resources/utpr-guide
Global minimum tax overview: /resources/global-minimum-tax-guide
Pillar Two is the OECD/G20 Inclusive Framework’s global minimum tax (GloBE rules) that targets a 15% minimum ETR per jurisdiction for large multinational groups, charging a top-up tax when the jurisdictional ETR is below 15% (GloBE Model Rules, Arts. 5.1–5.2).
2) What is the Pillar Two €750m threshold?
Pillar Two generally applies to groups with €750m or more consolidated revenue in the UPE’s financial statements in at least two of the four prior fiscal years (GloBE Model Rules, Arts. 1.1–1.2).
3) How is the Pillar Two ETR calculated?
Pillar Two ETR is calculated by jurisdiction as Adjusted Covered Taxes ÷ Net GloBE Income (GloBE Model Rules, Art. 5.1). It is not the same as the financial statement ETR.
4) What is the order of application: QDMTT, IIR, and UTPR?
In general, Pillar Two is designed so that domestic top-up taxes (QDMTTs)—where treated as qualified/recognized—reduce the residual top-up exposure first, then IIR applies as the primary parent-level rule, and UTPR applies as a backstop where IIR does not apply or does not fully collect (GloBE Model Rules; OECD Commentary 2025). (oecd.org)
5) What is a QDMTT and why does it matter for Pillar Two?
A QDMTT is a domestic minimum top-up tax intended to allow the low-tax jurisdiction to collect top-up tax first. When treated as qualified, it generally reduces or eliminates residual top-up tax otherwise collected under IIR/UTPR (OECD Commentary 2025; Model Rules Art. 5.2 framework). (oecd.org)
See /resources/qdmtt-guide.
6) What is the SBIE in Pillar Two?
The Substance-Based Income Exclusion (SBIE) is a carve-out that reduces the profit subject to top-up tax using a fixed return on eligible payroll costs and eligible tangible assets (GloBE Model Rules, Art. 5.3).
7) What are the SBIE transitional rates?
The Model Rules provide transitional rates that step down over time (GloBE Model Rules, Art. 9.2). For example, 2024 uses 9.8% of payroll and 7.8% of tangible assets; 2025 uses 9.6% and 7.6%, respectively.
8) How does Pillar Two relate to CbCR?
CbCR is central to Pillar Two because the Transitional CbCR Safe Harbour uses CbCR data and financial statement information to deem top-up tax = 0 in certain jurisdictions, reducing the need for full GloBE computations (OECD Safe Harbours and Penalty Relief, 2022).
9) What are the Pillar Two transitional CbCR safe harbour tests?
The transitional CbCR safe harbour includes three common pathways: a de minimis test, a simplified ETR test, and a routine profits test (OECD Safe Harbours and Penalty Relief, 2022). The transitional safe harbour is only available during the OECD-defined Transition Period (fiscal years beginning on/before 31 Dec 2026, but not including a fiscal year ending after 30 Jun 2028), and the Simplified ETR test uses Transition Rates of 15% (FY beginning 2023/2024), 16% (2025), and 17% (2026). (oecd.org)
10) When are Pillar Two returns due?
Deadlines are set by domestic law and vary by jurisdiction. For example, UK guidance indicates filing/reporting is due 18 months after the end of the first accounting period and 15 months after subsequent periods. (gov.uk)
Borys UlanenkoCEO of ArmsLength AI
