A multinational group restructures its European holding operations and routes dividend flows through a Belgian entity. The structure appears sound on paper. Yet at the first withholding tax audit, the Belgian tax administration challenges the arrangement, denies treaty benefits, and issues an assessment that erases the anticipated tax saving entirely. This outcome is not exceptional. It reflects a systematic tightening of Belgium's approach to tax treaty access – one that international investors and their advisers increasingly encounter.
Tax treaty benefits in Belgium operate through a dense body of tax legislation, bilateral treaty provisions. Additionally. EU directives that together govern when reduced withholding tax rates, corporate income tax exemptions. Additionally, permanent establishment protections actually apply. Belgium has concluded more than ninety bilateral tax treaties. However, accessing those treaties requires satisfying residence conditions, beneficial ownership tests. And. since the adoption of the OECD BEPS multilateral instrument. a principal purpose test that gives the tax administration wide discretion to deny relief. Structures that lack genuine commercial substance in Belgium carry a material risk of challenge.
This analysis examines the doctrinal foundations of Belgium's treaty regime, the gap between formal rules and administrative practice, the anti-abuse instruments currently deployed. Cross-border strategic implications for European clients. Additionally, the regulatory trajectory that practitioners should monitor.
Doctrinal foundations: how Belgium approaches tax treaty application
Belgium's tax treaties follow the OECD Model Convention in structure. They address residence, permanent establishment, income classification, and the elimination of double taxation. The practical starting point for any treaty claim is the determination of tax residency. Under Belgian corporate income tax rules, a company is resident in Belgium if it has its registered office, principal place of business, or seat of management there. This is a factual assessment. A letterbox entity with a Belgian address but management exercised abroad will generally fail the residence test.
Once residence is established, the treaty allocates taxing rights. For passive income – dividends, interest, and royalties – the treaty typically permits source-state taxation at a reduced withholding tax rate. The Belgian withholding agent applies that reduced rate at the moment of payment, provided the beneficiary has supplied adequate proof of residence in the treaty partner state. Belgian tax legislation specifies the procedural steps: a residence certificate from the foreign tax authority, a declaration of beneficial ownership, and in some cases a form prescribed by royal decree.
The beneficial ownership requirement deserves particular attention. Belgian practice, informed by OECD commentary and confirmed by the Belgian Court of Cassation. the Hof van Cassatie / Cour de Cassation (Supreme Court of Belgium). treats beneficial ownership as a substantive condition. Not merely a formal one. An entity that receives income but is legally or contractually obliged to pass it on to another party is unlikely to qualify as beneficial owner. Conduit arrangements structured to extract treaty benefits for an ultimate recipient who would not independently qualify for them are the primary target of this analysis.
Belgium's network of bilateral treaties has historically been wide and, in some areas, generous by European standards. The dividend withholding tax rate between Belgium and several treaty partners is reduced to levels below the standard domestic rate of thirty percent. That domestic rate – applicable under Belgian corporate income tax legislation to dividends paid to non-resident recipients – makes treaty access commercially significant. The difference between the treaty rate and the domestic rate can represent a material cost on cross-border dividend distributions, particularly in holding group structures.
The anti-abuse architecture: general clauses, the PPT, and Belgian domestic rules
Belgium's anti-abuse regime operates on three levels. Each level is capable of independently denying treaty benefits. In practice, the tax administration frequently invokes more than one simultaneously.
The first level is the domestic general anti-abuse provision in Belgian tax legislation. This provision – longstanding in Belgian law but substantially reinforced in recent years – allows the tax administration to disregard legal acts that are entered into with the principal aim of avoiding tax. There. Those acts are artificial or lack economic substance. Belgian courts have applied this provision to treaty-access structures. The administration does not need to identify an express prohibition on the arrangement; it suffices to show that the taxpayer chose a path primarily for its fiscal outcome rather than for genuine commercial reasons.
The second level is the principal purpose test, or PPT. The PPT entered Belgian treaty law through Belgium's ratification of the OECD Multilateral Convention to Implement Tax Treaty Related Measures to Prevent Base Erosion and Profit Shifting – the so-called multilateral instrument. That instrument modified a significant portion of Belgium's existing treaty network. Under the PPT, treaty benefits are denied if one of the principal purposes of an arrangement or transaction was to obtain those benefits. Unless granting the benefits would be consistent with the object and purpose of the treaty. The burden of establishing that benefits are consistent with the treaty's object and purpose rests, in practice, with the taxpayer.
This is a meaningful shift. Under the older general limitation-on-benefits approach used in some of Belgium's earlier treaties, denial of benefits required meeting specific categorical tests. The PPT replaces that framework with a purposive, fact-intensive enquiry. Belgian tax practitioners note that the administration applies the PPT with considerable breadth. Structures involving intermediate holding companies in third states, back-to-back financing arrangements, and royalty routing through low-tax conduits are especially exposed.
The third level consists of specific anti-avoidance rules targeting particular income types. Belgian tax legislation contains targeted provisions addressing interest deductions, hybrid instruments, and arrangements that produce asymmetric tax outcomes across jurisdictions. The EU Anti-Tax Avoidance Directives. transposed into Belgian law. add further layers. This includes rules on controlled foreign companies. Hybrid mismatches. Additionally, limitations on the deductibility of interest where arrangements are designed to erode the tax base.
For a European client seeking to use Belgium as a holding location or financing hub, the combined effect of these three levels requires careful mapping before any structure is implemented. The risk is not merely academic. Belgian tax assessments arising from treaty benefit denials frequently carry penalties in addition to the primary tax, and interest accrues from the date the tax was originally due.
To explore how Belgian corporate law interacts with these tax considerations at the entity level. See our analysis of corporate law matters in Belgium. This addresses entity selection, governance. Additionally, the regulatory conditions that underpin tax-efficient structures.
Gap between statute and practice: what Belgian courts and the administration actually do
The formal rules in Belgian tax legislation and the bilateral treaties provide one picture. Administrative practice and court decisions provide another. Understanding the gap between them is essential for any practitioner advising on Belgian treaty positions.
Belgian administrative practice on treaty claims has become markedly more assertive. Requests for advance rulings – submitted to the Dienst Voorafgaande Beslissingen / Service des Décisions Anticipées (Belgian Advance Ruling Authority) – are an important indicator. The Ruling Authority has, in a series of published decisions, set out the substance requirements it considers necessary for a Belgian entity to be recognised as a treaty-eligible resident. Those requirements include: a board of directors that genuinely meets and takes decisions in Belgium, key management personnel physically present in Belgium. Meaningful financial and operational risk borne in Belgium. Additionally, adequate equity relative to the functions performed.
Where those conditions are not met, the Ruling Authority declines to confirm treaty access. This is a pre-emptive denial – before any transaction occurs. The practical consequence is that taxpayers who do not seek a ruling, or who proceed despite an unfavourable ruling signal, face a materially elevated audit risk.
In litigation, the Hof van Cassatie has clarified several important points. Courts consistently hold that the substance-over-form principle applies to treaty interpretation in Belgium. A corporate structure that is legally valid under Belgian corporate legislation is not automatically entitled to treaty benefits if its predominant purpose was tax reduction rather than commercial activity. The court has further confirmed that treaty benefits can be denied even where the taxpayer's arrangement does not violate any specific prohibition in domestic law. the anti-abuse analysis operates at a higher level of generality.
One recurring tension in Belgian case law involves the allocation of the burden of proof. Belgian tax legislation places the primary burden on the tax administration to establish that an abuse has occurred. In practice, however, courts have allowed the administration to satisfy this burden through circumstantial evidence: the absence of economic activity in Belgium. The short time between the establishment of the structure and the receipt of income. Additionally, the mechanical pass-through of income to ultimate recipients in jurisdictions not covered by a treaty.
Once the administration produces such evidence, the burden shifts to the taxpayer to demonstrate a genuine non-tax purpose. Taxpayers who cannot produce contemporaneous documentation – board minutes, correspondence, business plans, or evidence of operational activity – consistently fail at this stage. A common mistake made by international clients is to implement a structure first and attempt to document its rationale retroactively. Belgian courts treat this approach with considerable scepticism.
For a comparative perspective on how similar treaty-access questions arise in Portugal's civil law system. another Atlantic-facing EU member state with a substantial treaty network. the analysis at tax treaty benefits in Portugal provides a useful reference point for clients operating across both jurisdictions.
Cross-border implications for European clients
Belgium occupies a particular position in European tax planning. It is an EU member state with a developed holding regime, a broad treaty network, and historically favourable rules on the participation exemption under its corporate income tax legislation. That participation exemption allows Belgian holding companies to receive dividends from subsidiaries largely free of Belgian corporate income tax, provided certain conditions on minimum shareholding and holding period are met. The combination of the participation exemption and treaty-reduced withholding at source has made Belgium an attractive location for intermediate holding structures within European groups.
That attractiveness has not disappeared. But the conditions for sustaining it have become substantially more demanding. European clients – whether structured out of Germany, the Netherlands, France, or the Iberian markets – must now satisfy substance requirements that were rarely tested a decade ago. The EU's work on harmful tax practices, the BEPS project outputs, and Belgium's own legislative reinforcement of its anti-abuse provisions have collectively raised the threshold.
The permanent establishment question adds further complexity for European groups. A Belgian entity that exercises management or concludes contracts on behalf of a foreign affiliate may inadvertently create a permanent establishment of that affiliate in Belgium. Belgian tax legislation, following the OECD approach, attributes taxing rights to Belgium over the profits attributable to such a permanent establishment. Conversely, a foreign entity that conducts preparatory or auxiliary activities in Belgium without crossing the permanent establishment threshold retains the benefit of its home-country tax position. Identifying where that threshold falls requires a detailed functional and factual analysis – and the answer frequently turns on how personnel and decision-making authority are actually organised, rather than how they are described in contracts.
Transfer pricing is a closely linked concern. Where a Belgian entity performs genuine functions within a group, Belgian tax legislation requires that intercompany transactions be priced at arm's length. The tax administration has developed active transfer pricing audit capacity. European clients who rely on Belgium as a financing or holding hub must ensure that the pricing of intragroup loans, guarantees, and service fees reflects the actual risk and functions borne in Belgium. Misalignment between contractual allocation of risk and actual operational reality remains one of the most frequent grounds for transfer pricing adjustments in Belgium.
For clients whose structures span Belgium and Portugal. a pairing that arises in Atlantic-facing investment platforms and in Iberian market entry through European holding chains. the interaction between Belgian and Portuguese tax residency rules. Withholding tax obligations. Additionally, anti-abuse provisions requires analysis under both legal systems simultaneously. An arrangement that satisfies Belgian substance requirements may still trigger Portuguese controlled foreign company rules or withholding obligations on payments to Belgian entities, depending on how the Portuguese tax administration characterises the economic relationship. Practitioners advising on such structures should map both systems before implementation.
To receive a tailored assessment of treaty benefit exposure across your European structure, contact us at info@ferrazwhitmore.com.
Strategic recommendations and the outlook for Belgian treaty practice
The trajectory of Belgian treaty practice points toward continued tightening. The OECD Pillar Two global minimum tax rules – transposed into Belgian law – have altered the economics of certain holding and financing structures by introducing a minimum effective tax rate floor. Structures that previously generated significant tax savings through treaty access and the participation exemption may now produce smaller net advantages after Pillar Two top-up taxes are applied. This does not eliminate the relevance of treaty planning, but it changes the cost-benefit calculation and requires a recalibration of existing structures.
For clients evaluating whether Belgium remains the right holding location, the strategic assessment should address several distinct questions. First, does the entity performing the holding or financing function have genuine substance in Belgium – not as a matter of box-ticking, but in operational reality? Second, are the treaty benefits being claimed consistent with the object and purpose of the relevant treaty, or does the structure rely on a mismatch between formal entitlement and economic substance? Third, has the structure been documented contemporaneously, with board decisions, functional analyses, and transfer pricing studies that can withstand audit scrutiny?
Where existing structures do not satisfy these criteria, the options are not binary. Partial restructuring – relocating certain functions to Belgium, adjusting intercompany pricing, or modifying the allocation of risk – may be sufficient to bring the arrangement within the zone of defensibility. In some cases, a more fundamental redesign is necessary. Belgian advance rulings remain a valuable tool for obtaining certainty before committing to a structure, provided the application is made before transactions are executed and reflects the actual intended arrangement.
Clients who forgo advance rulings to preserve confidentiality or speed of execution accept a higher audit risk. That risk has increased as the Belgian tax administration has expanded its exchange-of-information activity under EU and OECD instruments. Information reported under mandatory disclosure rules, country-by-country reporting, and automatic exchange of financial account information now provides the administration with a substantially richer dataset for identifying structures that warrant closer examination.
The outlook is one of sustained pressure on arrangements that cannot demonstrate genuine economic substance. This does not mean Belgium has ceased to be a viable European holding and financing location. It means that the discipline required to sustain a Belgian structure – in substance, documentation, and ongoing governance – is greater than it was, and that periodic review of existing arrangements is no longer optional.
Our tax law practice in Belgium provides advisory support across treaty access analysis, advance ruling applications, transfer pricing documentation, and restructuring of existing holding arrangements. For a preliminary review of your European tax structure and its treaty benefit exposure, email info@ferrazwhitmore.com.
Frequently asked questions
Q: How does a company in Belgium claim withholding tax relief under a tax treaty?
A: A Belgian withholding agent must typically apply a reduced rate at source once the recipient provides proof of tax residency in the treaty partner state. In practice, Belgian tax authorities often require a certificate issued by the foreign tax administration. Where the full domestic rate is withheld initially, a refund procedure is available, though it carries a defined filing deadline and documentary burden.
Q: What is the principal purpose test and how does it affect treaty claims in Belgium?
A: The principal purpose test is an anti-abuse standard incorporated into Belgian tax legislation and reflected in treaties following the OECD BEPS multilateral instrument. It denies treaty benefits where one of the principal purposes of an arrangement was to obtain those benefits. Belgian courts and the tax administration apply this test broadly, scrutinising not just the legal form of a structure but the commercial substance behind it.
Q: Can a holding company incorporated in Belgium access treaty benefits on behalf of a group?
A: A Belgian holding company may access treaty benefits if it meets the tax residency conditions under Belgian corporate income tax rules and the relevant treaty. However, the holding must demonstrate genuine economic substance – real management, decision-making, and operational presence in Belgium. A conduit structure lacking such substance is at high risk of challenge under Belgian anti-abuse rules and the principal purpose test.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our tax law practice supports international groups, institutional investors, and in-house counsel on treaty benefit access, withholding tax compliance, permanent establishment analysis, and transfer pricing in Belgium and across the EU. We combine Portuguese civil law expertise with English common law tradition to deliver cross-border tax advice that is grounded in both legal systems. The firm's tax team has experience before the Belgian Advance Ruling Authority and advises on structures spanning multiple European jurisdictions. As a law firm active across Belgium and Iberian markets, Ferraz & Whitmore brings direct knowledge of the interaction between Belgian, Portuguese, and EU tax rules. To discuss your European tax structure, contact us at info@ferrazwhitmore.com.
Disclaimer: This publication is provided for informational purposes only and does not constitute legal advice. The information herein should not be relied upon as a substitute for professional legal counsel tailored to your specific circumstances. Ferraz & Whitmore assumes no liability for actions taken or not taken based on the contents of this material. For advice regarding your particular situation, please contact info@ferrazwhitmore.com.