The OECD released a January 2026 Side-by-Side package and related common understanding addressing coordinated GIR filing and information exchange. The legal effect of these developments on existing domestic Pillar Two rules varies by jurisdiction and should be verified against each country’s implementing legislation. Any international holding company structure signed off before 2024 may need to be reviewed not once but twice before the first Global Anti-Base Erosion (GloBE) information return filings land in mid-2026. That is the pace of change now, and it is worth taking seriously.
The practical question for every group above EUR 750 million in consolidated revenues is no longer which jurisdiction offers the lowest headline rate. An international holding company structure is evaluated today on whether it survives a functional analysis by a revenue authority operating under the Base Erosion and Profit Shifting (BEPS) Inclusive Framework, and whether the effective tax rate in the holding jurisdiction clears the 15% Pillar Two floor. Below that floor, a top-up tax will be collected somewhere in the group, most likely where the parent entity sits.
Groups below the EUR 750 million consolidated revenue threshold fall outside Pillar Two’s scope. However, domestic substance requirements, transfer pricing rules, Country-by-Country Reporting obligations, and local anti-avoidance provisions may still apply depending on the jurisdiction. The 2024 and 2025 peer review reports published by the OECD confirm that Inclusive Framework members have now embedded the BEPS minimum standards into domestic law. A zero-substance holding company in Singapore, Hong Kong, or the UAE draws scrutiny regardless of group size.
What is an international holding company structure
A holding company sits above operating subsidiaries and holds their shares, intercompany loans, or intellectual property (IP) rights. The flows passing through it include dividends, interest, royalties, and capital gains on subsidiary disposals. Before 2015, the structuring objective was to route those flows through a low-tax entity with minimal footprint. The OECD BEPS project, launched in 2013 and embedded in domestic law across most Inclusive Framework members by 2024, changed that objective entirely.
The distinction the BEPS rules draw is between a holding company with genuine economic functions and one that exists to shift income. A genuine holding company performs functions: it owns assets, manages intercompany treasury, exercises oversight of subsidiary boards, and takes on real financial and operating risks in the host jurisdiction. A shell holding company performs none of those functions and is now the primary audit target for most revenue authorities.
Core functions in modern structures
The functions regulators expect to see in a holding company include share ownership (documented with share registers and dividend resolutions), intercompany financing (with arm’s length pricing and documented risk management), treasury management (centralized cash pooling and foreign exchange management), IP ownership or data administration, and strategic decision-making by a board that meets in the host jurisdiction. The substance requirement follows directly from the functions.
If the holding company owns intercompany loans, it needs treasury staff to manage them. If it holds IP, it needs employees who understand and actively manage that IP. Boards that rubber-stamp decisions made elsewhere by the parent do not meet the standard. The peer review reports released between 2024 and 2025 specifically flag zero-employee and zero-revenue holding entities as high-risk across Inclusive Framework members.
From pre-BEPS to post-BEPS design
Before 2013, the standard design involved a Cayman or British Virgin Islands (BVI) holding vehicle receiving dividends from operating companies, with no employees and no real activity. Those structures are no longer viable, and the BVI/Cayman pattern should be treated as a cautionary example rather than a live option. Pillar Two, active since fiscal years beginning January 1, 2024, renders pure low-tax holds uneconomic for in-scope groups. For groups below the EUR 750 million threshold, the audit and reputational risk of a zero-substance structure is the dominant concern, particularly for groups with EU counterparties.
BEPS compliance framework for holding companies
The OECD BEPS project establishes four binding minimum standards for participating jurisdictions: countering harmful tax practices, preventing treaty abuse, improving cross-border dispute resolution, and requiring Country-by-Country Reporting (CbCR) for large multinational groups. As of 2024 and 2025, peer review reports confirm that most Inclusive Framework members have embedded these standards into domestic law.
For any international holding company structure, that embedding carries a direct consequence. The standards are no longer aspirational benchmarks. A structure that exploits gaps between jurisdictions where those gaps have been formally closed by peer-reviewed domestic legislation exposes the group to audit and reassessment.
Country-by-Country Reporting
CbCR applies to groups with EUR 750 million or more in consolidated annual revenues. The holding company must report revenue, pre-tax profit, taxes paid, tangible assets, and employee headcount by jurisdiction. The red flags are well documented: zero employees in the holding jurisdiction while profit or assets are reported there, or revenue appearing in the holding jurisdiction without corresponding operating activity.
A holding company with zero reported employees in Singapore, Hong Kong, or the UAE, while reporting significant intercompany income, will not survive the first year of CbCR scrutiny without follow-up inquiries. The Singapore economic substance rules require documentation before the audit, not in response to one.
Transfer pricing and functional analysis
The arm’s length standard applies to every intercompany transaction flowing through the holding company: interest on loans to subsidiaries, royalties on IP licensed to operating entities, management service charges, and guarantee fees. The profit allocated to the holding company must match the functions it performs, the assets it deploys, and the risks it assumes.
Under BEPS Actions 4 and 13, a holding company that receives a large royalty stream but employs no IP development staff, takes no development risk, and contributes no capital to IP creation will not support the royalty rate at arm’s length. The functional analysis memo and the transfer pricing (TP) study must be prepared before the fiscal year closes, not after the audit notice arrives.
Pillar Two and global minimum tax impact
The Income Inclusion Rule (IIR) has been active since fiscal years beginning on or after January 1, 2024, in the jurisdictions that enacted it first. The Undertaxed Profits Rule (UTPR) is effective from 2026 onward in most adopting jurisdictions. For calendar-year taxpayers, the first GloBE information return filings are expected by mid-2026. The OECD’s consolidated GloBE Commentary, published in May 2025 and updated by the January 2026 Side-by-Side package, is the governing document for any structure being reviewed today. Any international holding company structure modeled against pre-2026 guidance needs to be checked against that updated baseline.
How the IIR affects holding companies
Under the IIR, the parent company includes in its taxable income the profits of any constituent entity, including the holding company, where the effective tax rate in the holding jurisdiction falls below 15%. The top-up tax is collected in the parent’s jurisdiction at the rate needed to bring the effective rate to 15%.
Singapore’s headline corporate rate is 17%, but the effective rate of a holding company that benefits from exemptions may fall below that on a GloBE calculation basis. Hong Kong’s two-tier rate system applies 8.25% on the first HK$2 million of assessable profits, with 16.5% on the remainder; a small or mid-size holding company in Hong Kong can report an effective rate below 15% on a blended basis. The UAE free zone 0% rate for qualifying income under the Qualifying Free Zone Person (QFZP) regime is explicitly below 15%. All three jurisdictions require Pillar Two modeling for in-scope groups.
Safe harbors and the UTPR timeline
Domestic safe harbors reduce the compliance burden for qualifying entities. Australia’s legislation for a 15% global and domestic minimum tax applies the IIR from fiscal years starting January 1, 2024, and introduces a Side-by-Side safe harbor for fiscal years beginning on or after January 1, 2026, as confirmed by the Australian Taxation Office. That safe harbor affects how Australian-headquartered groups calculate their Pillar Two liability across the structure.
The UTPR enforcement timeline of 2026 and beyond means that holding structures in jurisdictions that have not enacted Pillar Two domestically are no longer insulated. The UTPR allows other group jurisdictions to collect the top-up tax, so a holding company in a zero-tax jurisdiction cannot shelter group profits from Pillar Two if the parent or another group entity sits in a UTPR-adopting jurisdiction. Groups should model their Pillar Two impact before the GloBE information return deadline in mid-2026 and verify their analysis against the January 2026 Side-by-Side package.
EU ATAD interest limitation rules
The European Union’s Anti-Tax Avoidance Directive (ATAD) imposes an interest limitation rule that restricts the deductibility of exceeding borrowing costs to 30% of earnings before interest, tax, depreciation, and amortization (EBITDA), or a fixed monetary threshold of EUR 3 million in some applications, whichever is higher. The rule applies to all EU holding companies financed with intra-group debt.
By 2026, the ATAD interest limitation approach is broadly in force across EU member states. Member states that previously had targeted national rules were permitted to continue applying those rules until January 1, 2024, after which alignment with the 30% EBITDA standard was expected. Germany’s Zinsschranke, which also limits net interest deductibility to 30% of EBITDA, is structurally aligned with the ATAD approach, reinforcing the convergence across major EU economies. Non-EU groups with EU subsidiaries are also affected, because the interest limitation applies at the subsidiary level regardless of where the parent sits.
Debt vs. equity financing trade-offs
The choice between intra-group debt and equity injection in an EU holding company involves a direct trade-off. Debt generates deductible interest, subject to the 30% EBITDA cap. Equity generates dividends, which are not deductible but may qualify for the participation exemption in the holding jurisdiction, with the dividend withholding tax rate determined by the applicable Double Taxation Agreement (DTA).
| Financing instrument | Deductibility cap | Withholding tax exposure | Substance requirements |
|---|---|---|---|
| Intra-group debt | 30% of EBITDA (ATAD) | Interest WHT (treaty-dependent) | Arm’s length rate, TP documentation |
| Equity injection | No deduction available | Dividend WHT 5-15% (treaty-dependent) | Beneficial ownership, substance in holdco |
| Hybrid instruments | ATAD II anti-hybrid rules apply | Risk of double non-taxation denial | Legal analysis required per instrument |
Structuring under ATAD constraints
A holding company cannot rely on pure debt to fund acquisitions under ATAD. The practical approach is to combine equity injection with subordinated debt within the EBITDA cap, model the cap at conservative EBITDA scenarios, and account for carryforward rules that allow unused capacity to be applied in future periods where the local rules permit. Non-deductible interest is not a tax risk; it is a cash cost that permanently reduces the return on the acquisition.
Substance, governance, and functions
Every jurisdiction that has implemented BEPS minimum standards now requires that a holding company have real economic substance in the host jurisdiction. Substance means real employees with genuine responsibilities, a board that meets locally and exercises genuine oversight, and decision-making authority concentrated in the holding jurisdiction rather than delegated back to a remote parent.
The peer review reports published by the OECD in 2024 and 2025 identify substance failures as a primary audit trigger across Inclusive Framework members. Structures with local directors who hold no real authority, no staff, and no documented minutes are flagged consistently in those reports.
Functions, assets, and risks
The Functions, Assets, and Risks (FAR) framework is the analytical tool tax authorities use to evaluate whether profit allocation matches economic reality. A holding company must own real assets (shares, intercompany loans, IP rights), perform real functions (treasury management, board oversight, financial reporting, IP management), and bear real risks (currency exposure, funding risk, counterparty risk on intercompany loans).
Passive holding with no active function creates a reclassification risk. A Singapore holding company that holds shares in operating subsidiaries but performs no treasury function, employs no staff, and holds no real IP will not support a structure routing intercompany income through Singapore. The BEPS Action 13 contemporaneous documentation standard requires a functional analysis memo, a benchmarking study prepared to BEPS standards, and an economic substance review, all in place before the fiscal year closes.
Board and employee requirements
The board of a BEPS-compliant holding company must include directors who are locally based or independent, hold quarterly meetings with substantive documented minutes, and exercise real oversight of subsidiary decisions such as dividend resolutions, intercompany loan approvals, and IP licensing terms. Minutes that consist of one-line resolutions ratifying decisions already made at the parent’s head office will not satisfy a functional analysis.
The minimum staff benchmark is at least one treasury or finance employee based in the host jurisdiction, with demonstrable responsibility for the intercompany transactions the holding company runs. Zero employees in a holding company that reports significant intercompany income is a CbCR red flag regardless of the jurisdictional headline rate.
Jurisdiction selection in BEPS-compliant structures
The premise that low-tax jurisdictions are automatically preferable no longer holds for any international holding company structure involving a group of significant scale. The relevant question is which jurisdiction supports the functions the holding company needs to perform, at a cost that makes sense against the potential tax saving, and with a treaty network that reduces withholding tax on dividend and interest flows.
Jurisdiction suitability comparison
| Jurisdiction | Corporate tax rate | Pillar Two effective rate exposure | Substance requirements | Safe harbors / transitions |
|---|---|---|---|---|
| Singapore | 17% headline | Effective rate may fall below 15% with exemptions | IRAS Section 10L; real board, employees required | Domestic minimum top-up tax enacted |
| Hong Kong | 8.25% / 16.5% two-tier | Small holdcos may fall below 15% on blended basis | FSIE regime requires nexus; DIPN 58 documentation | Qualified domestic minimum top-up tax |
| UAE (free zone) | 0% qualifying income (QFZP) | Below 15%; top-up collected in parent jurisdiction | QFZP conditions: adequate substance, qualifying income, audited accounts | No Pillar Two safe harbor announced for UAE free zones |
| Australia | 30% corporate rate | Above 15%; no top-up exposure | Normal substance expectations apply | Side-by-Side safe harbor from January 2026 |
Treaty networks and beneficial ownership
Treaty access depends on beneficial ownership. A Singapore holding company that receives dividends from a German subsidiary at the reduced rate under the Singapore-Germany DTA must be the beneficial owner of those dividends, not a conduit for a parent in a non-treaty jurisdiction. BEPS Action 6 (treaty abuse prevention) is now embedded in most DTAs through the Principal Purpose Test (PPT), which denies treaty benefits where one of the principal purposes of the arrangement was to obtain those benefits.
The holding company must therefore have documented business reasons for being in the holding jurisdiction that go beyond the reduced withholding tax rate. Those reasons include the treaty network, the regulatory environment, the location of decision-makers, and access to banking relationships. The choice between Singapore, Dubai, and Hong Kong as a holding base is primarily a treaty and substance question, not a headline rate question.
Design checklist for BEPS-compliant structures
An international holding company structure that passes regulatory scrutiny in 2026 requires alignment across four areas: substance, documentation, Pillar Two readiness, and CbCR accuracy.
Substance: the holding company needs a board with at least two independent or locally based directors, documented quarterly meetings with substantive minutes, at least one full-time treasury or finance employee in the host jurisdiction, and a bank account under the holding company’s control with genuine transaction activity reflecting its stated functions.
Documentation: the contemporaneous TP file must include a functional analysis memo, an arm’s length benchmarking study for every material intercompany transaction category, and an economic substance review. This documentation must be in place before the end of the first fiscal year to which it relates.
CbCR accuracy: the holding company’s CbCR entry must accurately reflect the employees, revenue, and assets present in the holding jurisdiction. A CbCR entry showing zero employees but significant intercompany income generates follow-up questions in every jurisdiction where the group operates. The Singapore holding company compliance calendar illustrates how these filing obligations interact for a Singapore-based holding structure.
Documentation and compliance requirements
The BEPS Action 13 contemporaneous documentation standard requires a master file (group-level), a local file (entity-level), and CbCR filing where the group meets the EUR 750 million threshold. For Singapore, the per-category TP documentation thresholds under Section 34F of the Income Tax Act apply from Year of Assessment 2026 at S$2 million per category for services, royalties, guarantees, and leases, and S$15 million for goods transactions.
For Hong Kong, the local file thresholds under DIPN 58 are category-specific: HK$220 million for property transfers, HK$110 million for financial assets, HK$110 million for intangibles, and HK$44 million for other transactions. The master file exemption in Hong Kong applies at the entity level if the group meets any two of three size tests: revenue not exceeding HK$400 million, total assets not exceeding HK$300 million, and no more than 100 employees.
For the UAE, the transfer pricing documentation threshold is based on Ministerial Decision No. 97 of 2023, which applies where consolidated group revenue reaches AED 200 million.
Pillar Two readiness checklist
The GloBE information return infrastructure must be operational by mid-2026 for calendar-year taxpayers in most enacting jurisdictions. The data requirements are substantial: effective tax rate calculations by jurisdiction, adjusted covered tax calculations, substance-based income exclusions, and safe harbor qualification assessments.
Any international holding company structure that has not been modeled against the January 2026 Side-by-Side guidance is working from an outdated baseline. The Side-by-Side package modified provisions relating to the UTPR, transitional safe harbors, and the treatment of certain tax credits. Groups must verify that qualified domestic minimum top-up taxes in their operating jurisdictions will be recognized under the GloBE rules, because that recognition determines the residual top-up tax owed by the parent after domestic collections. The OECD’s GloBE model rules page carries the current consolidated commentary and Side-by-Side updates.
FAQ
How does BEPS 2.0 Pillar Two’s 15% global minimum tax affect international holding company structure jurisdiction and substance choices?
For in-scope groups (EUR 750 million or more in consolidated revenues), the choice of holding jurisdiction now requires a Pillar Two effective tax rate analysis before the structure is confirmed. A holding company in a jurisdiction taxed below 15%, including Singapore with exemptions, Hong Kong on small profit bases, or a UAE free zone under QFZP rules, will trigger top-up tax collected by the parent jurisdiction under the IIR. The January 2026 Side-by-Side package updated the rules, so any analysis based on pre-2026 guidance should be reviewed before the first GloBE information return filing in mid-2026. On substance, Pillar Two reinforces the BEPS message: low-substance holdings in low-tax jurisdictions are now doubly exposed, to top-up tax on the income side and to audit scrutiny on the substance side.
What constraints do EU ATAD’s 30% EBITDA interest limitation rules impose on debt financing for EU holding companies?
The ATAD cap limits the deduction of exceeding borrowing costs to 30% of EBITDA in the relevant EU entity. Interest above that cap is non-deductible in the current period and becomes a permanent cost drag for deals with thin margins. The practical response is to model the cap at conservative EBITDA projections, combine equity injection with subordinated debt within the cap, and carry forward unused capacity where the local rules permit.
Which multinational groups must redesign holding structures for Pillar Two compliance?
Groups with EUR 750 million or more in consolidated annual revenues in at least two of the last four fiscal years fall within scope. For those groups, every constituent entity, including the holding company, must be assessed for effective tax rate compliance against the 15% GloBE floor.
How do domestic minimum tax implementations (such as Australia’s) interact with multi-tiered international holding company structures?
Where a domestic minimum top-up tax is enacted and recognized as a qualified domestic minimum top-up tax under the GloBE rules, the top-up tax is collected in the operating jurisdiction rather than by the parent under the IIR. Australia’s Side-by-Side safe harbor, effective January 2026, reduces the compliance burden for qualifying groups headquartered there. Multi-tiered structures must map which jurisdictions have enacted qualified domestic minimum taxes, which jurisdictions apply the IIR, and where residual top-up tax liability falls after domestic collections are accounted for. That mapping changes materially between the May 2025 consolidated GloBE Commentary and the January 2026 Side-by-Side package.
What design features do tax authorities currently expect in BEPS-compliant holding companies?
Real employees in the host jurisdiction with genuine responsibilities, a locally meeting board that produces substantive minutes, arm’s length pricing on every intercompany transaction, and contemporaneous TP documentation (functional analysis, benchmarking, risk assessment) prepared before the fiscal year closes. Zero employees in a holding company reporting significant intercompany income fails the substance test in every jurisdiction that has implemented BEPS minimum standards.
How should an international holding company structure balance debt vs. equity financing under ATAD and Pillar Two rules?
Debt generates deductible interest subject to the 30% EBITDA ATAD cap; equity generates dividends that may qualify for the participation exemption but are not deductible at the subsidiary level. Under Pillar Two, the financing structure also affects the effective tax rate calculation, because the GloBE rules adjust for certain financing costs and tax credits in ways that can shift the blended rate above or below the 15% floor. The answer depends on the group’s EBITDA margins, the DTA withholding tax rates in the holding and operating jurisdictions, and the Pillar Two effective rate baseline calculated for the specific entity. This is a question for local counsel in the holding jurisdiction working alongside the group’s Pillar Two adviser.
Sources
- OECD: Base erosion and profit shifting (BEPS)
- OECD: Global Anti-Base Erosion Model Rules (Pillar Two)
- European Commission: ATAD interest limitation rule (EUR-Lex CELEX:52020DC0383)
- Australian Taxation Office: Implementation of a global minimum tax and a domestic minimum tax
- IRAS: Corporate income tax rate, rebates and tax exemption schemes
- Inland Revenue Department Hong Kong: Transfer pricing (DIPN 58)
- UAE Federal Tax Authority: Free Zone Person corporate tax bulletin
- Switzerland State Secretariat for International Finance: BEPS Minimum Standards
