Tax Law Update in Belgium: Q3 2026

Belgium';s tax landscape has shifted considerably in recent months, driven by legislative amendments, new administrative guidance, and landmark court rulings. For international businesses and founders operating in Belgium, understanding these changes is essential to managing compliance obligations and avoiding unexpected liabilities. This guide covers the most significant recent developments in belgium tax law 2026, including updates to corporate income tax, VAT rules, transfer pricing requirements, and individual taxation, along with their practical implications for cross-border structures.

Belgium';s corporate income tax framework has undergone several targeted amendments that affect both resident companies and non-resident entities with a Belgian establishment. The most consequential change concerns the treatment of notional interest deduction (NID), a long-standing Belgian mechanism that allows companies to deduct a notional return on equity from their taxable base. Recent legislative adjustments have recalibrated the NID rate calculation methodology, tightening the link between the deduction and genuine equity increases. Companies that relied on historical NID carryforwards should review their deferred tax positions carefully, as the new rules affect the usable balance going forward.

A second significant development relates to the participation exemption regime under the Income Tax Code. The Belgian tax authorities have issued updated administrative guidance clarifying the conditions under which dividends received from foreign subsidiaries qualify for the 100% dividend received deduction (DRD). The guidance introduces a stricter substance test for subsidiaries located in jurisdictions with low effective tax rates, aligning Belgian practice more closely with the EU Anti-Tax Avoidance Directive (ATAD) framework. In practice, Belgian holding companies receiving dividends from intermediate holding structures should reassess whether their subsidiaries meet the revised subject-to-tax and substance conditions.

A third area of change involves the minimum tax rules introduced to implement the OECD Pillar Two global minimum tax. Belgium has transposed the relevant EU Directive into domestic law, introducing a qualified domestic minimum top-up tax (QDMTT) and an income inclusion rule (IIR) applicable to large multinational groups with consolidated revenues above the relevant threshold. Groups that fall within scope must now file a dedicated GloBE information return with the Belgian tax authorities, and the first filing deadlines are approaching. Many multinationals have underestimated the administrative burden of this new obligation, particularly the data collection requirements across jurisdictions.

Belgium';s VAT framework has seen notable changes in two areas: the taxation of electronically supplied services and the VAT treatment of real estate transactions. On the digital services front, the Belgian tax authorities have updated their guidance on the One-Stop Shop (OSS) mechanism, clarifying how Belgian-registered businesses should report and remit VAT on cross-border B2C digital services supplied to EU consumers. A common mistake among smaller Belgian tech companies is failing to register for OSS in time, which results in the obligation to register for VAT in each individual EU member state where customers are located - a significantly more burdensome outcome.

For real estate, a recent legislative amendment has extended the option to apply VAT to certain commercial real estate transactions that would otherwise be exempt under the standard VAT exemption for immovable property. The amendment broadens the categories of transactions where the buyer and seller can jointly opt for VAT treatment, provided specific conditions are met. This change is particularly relevant for investors acquiring office buildings or logistics facilities, as VAT treatment allows the buyer to recover input VAT, improving cash flow in large transactions. In practice, the option must be exercised at the time of the notarial deed, and missing this window is irreversible.

Belgium has also updated its rules on VAT grouping, allowing legally independent entities that are closely bound by financial, economic, and organisational links to form a single VAT taxable person. The updated rules clarify the conditions for forming and dissolving a VAT group, as well as the joint and several liability of group members. Foreign investors establishing Belgian subsidiaries within a larger group structure should evaluate whether VAT grouping could simplify compliance and improve cash flow management.

Transfer pricing compliance has become a priority area for the Belgian tax authorities, and recent developments signal a more assertive audit approach. Belgium';s transfer pricing documentation requirements are governed by the Income Tax Code and aligned with OECD Transfer Pricing Guidelines. Recent administrative guidance has reinforced the obligation for Belgian entities that are part of a multinational group to maintain a master file, a local file, and - where applicable - a country-by-country report (CbCR). The thresholds for CbCR filing remain tied to consolidated group revenue, but the authorities have clarified that Belgian entities must proactively ensure the report is filed either by the ultimate parent entity or by a surrogate parent in Belgium.

The Belgian tax authorities have identified several audit focus areas in recent guidance. Intragroup financing arrangements are under particular scrutiny, especially where Belgian entities pay interest to related parties in lower-tax jurisdictions. The authorities apply the arm';s length principle strictly to interest rates, loan terms, and the financial capacity of the borrower. A non-obvious requirement is that Belgian entities must document not only the interest rate but also the rationale for the debt structure itself - demonstrating that a third-party lender would have provided financing on comparable terms.

Intragroup service charges are a second focus area. The authorities have challenged arrangements where Belgian entities pay management fees or shared service charges to foreign group companies without adequate documentation of the services actually rendered and the benefit received. In practice, Belgian subsidiaries should maintain detailed service level agreements, cost allocation keys, and evidence of actual service delivery. Many foreign-owned Belgian companies discover during an audit that their intercompany agreements are outdated or do not reflect the actual substance of the arrangement.

A recent Belgian court ruling - decided by the Court of First Instance in a case involving a Belgian manufacturing subsidiary - confirmed that the tax authorities may apply secondary adjustments where a primary transfer pricing adjustment has been made, treating the difference as a deemed dividend or deemed contribution. This ruling has practical implications for groups that have not aligned their intercompany agreements with their actual pricing practices.

If your group has Belgian entities with significant intercompany transactions, a proactive review of your transfer pricing documentation is advisable. We can assist with documentation, benchmarking, and advance pricing agreement applications. Contact us at info@vlolawfirm.com.

Belgium';s individual income tax rules have been subject to important changes, particularly for expatriates and internationally mobile employees. The Belgian special tax regime for inbound taxpayers - introduced by the Programme Law and subsequently refined - provides a favourable tax treatment for qualifying foreign executives and researchers assigned to Belgium. Recent administrative guidance has clarified the application conditions, including the requirement that the individual must not have been a Belgian tax resident or have had a professional activity in Belgium during a specified period prior to assignment.

Under the current regime, qualifying inbound taxpayers may benefit from a tax-free allowance covering certain costs deemed to be of a repetitive nature, as well as an exemption for a portion of their remuneration attributable to travel days outside Belgium. A common mistake made by employers is failing to apply for the regime within the mandatory deadline following the start of the assignment. Late applications are not accepted, and the employer loses the benefit entirely for that employee. Employers should build the application process into their standard onboarding procedures for internationally mobile staff.

For high-net-worth individuals, the Belgian tax authorities have continued to scrutinise structures involving Belgian residents who hold assets through foreign private wealth structures, including certain types of trusts and foundations. The Cayman Tax - Belgium';s look-through tax regime for income attributed to certain foreign legal constructions - has been extended in scope following recent legislative amendments. The amendments broaden the definition of legal constructions subject to the regime and tighten the reporting obligations for Belgian residents who are founders or beneficiaries of such structures. Individuals who have not reviewed their structures in light of these changes face a meaningful risk of non-compliance.

Belgium has also updated its rules on the taxation of stock options and warrants granted to employees. The lump-sum valuation method - which allows employees to be taxed on a fixed percentage of the underlying share value at grant rather than at exercise - remains available, but recent guidance has clarified the conditions under which the method applies and the consequences of early exercise or forfeiture. Employers granting equity compensation to Belgian employees should review their plan documentation to ensure it aligns with the updated guidance.

The Belgian tax authorities have received enhanced procedural powers under recent legislative amendments to the Code of Various Duties and Taxes and the Income Tax Code. The investigation period - the period during which the authorities may examine a taxpayer';s affairs and issue an assessment - has been extended in cases involving complex international structures or suspected fraud. The standard three-year investigation period remains in place for straightforward domestic situations, but the extended period of up to ten years now applies more broadly than before, covering situations where the authorities identify indications of tax avoidance even without a finding of fraud.

A significant procedural development concerns the use of data obtained through automatic exchange of information under the Common Reporting Standard (CRS) and the EU Directive on Administrative Cooperation (DAC). The Belgian authorities have confirmed that information received through these channels can be used as the basis for an assessment, and recent court decisions have upheld the admissibility of such evidence. Taxpayers with foreign accounts, investments, or structures who have not yet regularised their Belgian tax position should take note of the increased information available to the authorities.

On the dispute resolution side, Belgium has updated its procedures for mutual agreement procedures (MAP) under its network of double tax treaties. The updated procedures clarify timelines, the role of the Belgian competent authority, and the interaction between MAP and domestic appeal procedures. For multinationals facing double taxation as a result of a transfer pricing adjustment in Belgium or a foreign jurisdiction, MAP remains the primary mechanism for relief, but the process is lengthy and requires careful management of parallel domestic proceedings.

Belgium has also introduced a new administrative settlement procedure for certain categories of tax disputes, allowing taxpayers to reach a binding agreement with the tax authorities without full litigation. The procedure is available for disputes involving factual questions - such as the arm';s length nature of a transaction - rather than pure questions of law. In practice, this mechanism can reduce the cost and uncertainty of protracted litigation, but taxpayers should approach settlement negotiations with a clear understanding of their legal position.

For complex cross-border tax matters involving Belgian entities, early engagement with specialist advisers is strongly recommended. We can help assess your exposure and develop a response strategy. Contact us at info@vlolawfirm.com.

Does the Belgian Pillar Two minimum tax apply to all companies operating in Belgium?

The Pillar Two global minimum tax rules apply only to multinational enterprise groups and large-scale domestic groups whose consolidated annual revenues exceed the relevant threshold set by the implementing legislation. Smaller Belgian companies and groups that fall below this threshold are not subject to the qualified domestic minimum top-up tax or the income inclusion rule. However, Belgian entities that are part of a larger group should verify whether their ultimate parent group exceeds the threshold, as the obligation may arise at group level even if the Belgian entity itself is relatively small. Groups that are in scope must file a dedicated GloBE information return with the Belgian tax authorities, and the first filing cycle is already underway. Failure to file on time may result in administrative penalties.

How long does a Belgian transfer pricing audit typically take, and what are the cost implications?

A transfer pricing audit in Belgium can take anywhere from several months to several years, depending on the complexity of the transactions under review and the degree of cooperation between the taxpayer and the authorities. The process typically begins with an information request, followed by a detailed examination of the taxpayer';s documentation and, in some cases, an on-site visit. The cost implications for the taxpayer include both the direct cost of responding to the audit - gathering documentation, preparing responses, and engaging advisers - and the potential cost of any additional tax assessment, interest, and penalties. Maintaining robust transfer pricing documentation before an audit begins is the most effective way to reduce both the duration and the financial exposure of the process. Advance pricing agreements, while time-consuming to negotiate, provide certainty and eliminate audit risk for covered transactions.

Can a foreign executive assigned to Belgium always benefit from the inbound taxpayer regime?

Not automatically. The Belgian special tax regime for inbound taxpayers is subject to specific eligibility conditions, including requirements relating to the individual';s prior tax residence, the nature of their role, and the level of their remuneration. The employer must submit an application to the Belgian tax authorities within a strict deadline following the start of the assignment, and the regime must be applied consistently from the outset. Individuals who have previously worked or lived in Belgium may be excluded from the regime depending on the timing and nature of their prior presence. The regime also has a maximum duration, after which the individual is taxed under the standard Belgian individual income tax rules. Employers should assess eligibility carefully before the assignment begins rather than attempting to apply the regime retrospectively.

Belgium';s tax environment is evolving rapidly, with significant changes across corporate income tax, VAT, transfer pricing, individual taxation, and enforcement procedure. Businesses and individuals with Belgian tax exposure should review their structures, documentation, and compliance processes in light of these recent developments. Proactive engagement with the rules - rather than reactive adjustment after an audit or assessment - remains the most cost-effective approach.

VLO Law Firms advises international clients on tax law matters in Belgium. We can assist with corporate tax structuring, transfer pricing documentation, VAT compliance, inbound taxpayer regime applications, and tax dispute resolution. To request a consultation, contact: info@vlolawfirm.com