When FPS Finance opens a tax audit or issues a disputed assessment, Belgian and international businesses face a structured but time-sensitive dispute path that runs from administrative appeal through the courts of first instance, appeal and, ultimately, the Court of Cassation. Ferraz & Whitmore advises companies, funds and cross-border investors on defending positions at every stage of that path, including treaty-based procedures designed to eliminate double taxation. Acting early – ideally before the audit becomes an assessment – materially improves the options available to a taxpayer.
When Businesses Typically Need Tax Audit and Litigation Support in Belgium
Tax disputes in Belgium rarely arrive unannounced. They commonly follow a documentary request, a notice of intended correction or a transfer pricing review initiated by FPS Finance. International groups are particularly exposed because Belgian anti-avoidance legislation and the OECD-aligned transfer pricing framework interact with domestic regimes – such as the dividends received deduction and the innovation income deduction – in ways that are not always straightforward to apply across borders.
Typical triggers that prompt companies to seek specialist advice include: an on-site or desk audit of corporate income tax returns; challenges to the substance behind holding or financing structures; cross-border related-party transactions subjected to a comparability analysis; or a final tax assessment that departs significantly from the return as filed. The sooner a legal adviser is engaged, the broader the procedural toolkit remains.
The Belgian Tax Dispute Path: From Assessment to Cassation
Belgium's dispute resolution architecture is sequential. Understanding the sequence – and the point of no return at each stage – is essential for managing exposure effectively.
- Administrative appeal (bezwaarschrift / réclamation): A taxpayer who contests a tax assessment must first file a formal administrative appeal with FPS Finance. This is a mandatory step; bypassing it closes the door to judicial review. The appeal is handled internally by a division separate from the auditing team.
- Court of first instance (tax chamber): If the administrative appeal is rejected or not decided within the statutory period, the taxpayer may bring proceedings before the competent court of first instance sitting as a tax tribunal. This is where factual and legal evidence is fully examined.
- Court of appeal: Either party may appeal the first-instance judgment to the competent court of appeal. The court of appeal reviews both facts and law.
- Court of Cassation: The final domestic tier is the Court of Cassation, which reviews questions of law only. A Cassation ruling can quash the court of appeal's decision and refer the case to a different court of appeal for re-examination.
Each stage is governed by strict procedural requirements. A failure to comply – whether in framing the grounds of appeal or in meeting formal requirements for submissions – can result in arguments being deemed inadmissible rather than simply rejected on the merits. This procedural rigour makes early legal structuring of the dispute file critical.
Advance Certainty: The Role of the Ruling Commission
One instrument that sits upstream of any dispute is the advance ruling issued by Belgium's Ruling Commission (SDA/DVB). A binding advance ruling, obtained before a transaction is executed, can significantly reduce the risk of a subsequent audit challenge on the same facts. For international restructurings, holding arrangements or novel financing structures, engaging the Ruling Commission at the planning stage is often the most cost-effective form of dispute prevention available in Belgium.
Where a ruling is not sought in advance, or where circumstances change after a ruling is granted, the taxpayer faces the audit and appeal procedures described above without that protective layer. Ferraz & Whitmore assists clients in assessing whether a ruling application is appropriate and, where it is, in preparing the technical file submitted to the SDA/DVB.
If your group is structuring a Belgian operation or reviewing existing arrangements, our Belgian tax structuring practice works closely with the dispute team to integrate planning and defence from the outset.
Cross-Border Dimension: MAP, the EU Arbitration Convention and Directive 2017/1852
For international businesses, a Belgian tax dispute rarely remains purely domestic. Where FPS Finance makes an adjustment that produces – or risks producing – double taxation with another jurisdiction, treaty-based relief becomes relevant.
- Mutual Agreement Procedure (MAP): Most of Belgium's tax treaties include a MAP provision that allows competent authorities of two contracting states to negotiate a resolution when a taxpayer considers that the actions of one or both states are not in accordance with the treaty. MAP does not suspend domestic litigation automatically, and managing both processes in parallel requires careful coordination.
- EU Arbitration Convention (90/436/EEC): For transfer pricing disputes within the EU, the Arbitration Convention provides a mechanism to resolve double taxation where MAP reaches an impasse, including a binding arbitration panel if the competent authorities cannot agree within the prescribed period.
- Tax Dispute Resolution Mechanisms Directive (EU) 2017/1852: This Directive – implemented in EU Member States including Belgium – modernises and supplements the existing MAP framework for disputes concerning the interpretation of tax treaties between Member States. It introduces clearer timelines, expanded scope and an enforceable arbitration backstop, offering international taxpayers a more predictable route to resolution than the pre-Directive framework.
The interplay between domestic litigation and international procedures is one of the most technically demanding aspects of Belgian tax disputes. Pursuing the wrong sequence can jeopardise both the domestic appeal and the treaty remedy. Our team coordinates Belgian proceedings with MAP and Directive-based processes to preserve all available options.
If your situation involves a cross-border dispute or enforcement action, you may also wish to review our broader litigation and arbitration capabilities in Belgium, which cover both civil and commercial dimensions that can intersect with tax proceedings.
Common Pitfalls in Belgian Tax Disputes
Experience across a range of Belgian audit and litigation matters points to a consistent set of avoidable errors that weaken a taxpayer's position:
- Responding to audit queries without a defined strategy: Providing documents or explanations ad hoc, without first mapping the audit's likely direction, can inadvertently confirm facts that the auditor has not yet established.
- Missing the administrative appeal window: The bezwaarschrift / réclamation must be filed within the period prescribed by law. Late filing is not cured by the strength of the underlying legal argument.
- Conflating the roles of FPS Finance and other regulators: In financial services, the FSMA (financial market supervision) and the NBB (prudential supervision) operate separately from FPS Finance. Tax disputes arising in regulated entities require an understanding of how the regulatory and tax frameworks interact, but the respective authorities and procedures must not be confused.
- Failing to preserve the BCE/KBO record: Belgium's Crossroads Bank for Enterprises (BCE/KBO) is the authoritative register for entity identity and registered activities. Discrepancies between the BCE/KBO record and representations made in a tax return or during an audit can create unnecessary complications.
- Underestimating the evidentiary standard at first instance: The court of first instance examines facts fully. A case that reaches court without a well-organised evidential file – contemporaneous transfer pricing documentation, board minutes, functional analyses – is more difficult to defend than one prepared with litigation in mind from the audit stage.
How Ferraz & Whitmore Approaches Tax Audit Defence and Litigation in Belgium
Our involvement in a Belgian tax dispute typically follows a defined structure. At the audit stage, we review the scope of the inquiry, advise on information requests and accompany client representatives in meetings with FPS Finance. Where an adverse assessment is issued, we analyse the grounds for challenge and draft the administrative appeal, ensuring it is complete and properly framed to preserve all legal arguments for the judicial stage.
If the dispute proceeds to court, we work with Belgian qualified advocates and, where relevant, with advisers in other jurisdictions whose authorities are involved in the same matter. For treaty disputes, we prepare the MAP submission and, if Directive 2017/1852 or the EU Arbitration Convention applies, manage the international procedure alongside the domestic proceedings.
We do not guarantee outcomes. What we can offer is rigorous procedural management, technically grounded submissions and coordinated strategy across jurisdictions – applied consistently from the first audit letter through to whatever final resolution is available.
For a detailed procedural overview of how to challenge a tax assessment in Belgium step by step, see our guide to challenging a Belgian tax assessment.
Self-Assessment Checklist: Is Your Position Adequately Protected?
The following questions help identify whether existing arrangements and documentation meet the standard that FPS Finance is likely to apply during an audit:
- Is contemporaneous transfer pricing documentation in place for all intercompany transactions involving Belgian entities?
- Have Belgian entities claiming the dividends received deduction or the innovation income deduction prepared technical files that reflect current FPS Finance guidance?
- Are the BCE/KBO registrations for Belgian entities accurate and up to date?
- Has the group assessed whether an advance ruling from the SDA/DVB would be appropriate for any planned restructuring?
- Is there a clear protocol for responding to audit information requests, including escalation to legal counsel before material is provided?
- Where a dispute already exists, has the group mapped the interaction between domestic appeal rights and any available MAP or Directive 2017/1852 procedure?
If any of these questions reveals a gap, addressing it before FPS Finance makes contact is considerably less costly than doing so during a live dispute. We are available to assist with a structured review.
To discuss your specific situation with our Belgium team, please write to info@ferrazwhitmore.com or visit our contacts page.
Working with Ferraz & Whitmore on Belgian Tax Disputes
Ferraz & Whitmore operates as an internationally oriented firm, coordinating advice across jurisdictions for clients who cannot afford to have their Belgian dispute managed in isolation from the rest of their group's tax and legal exposure. Our Belgium-focused team engages with FPS Finance procedures, Belgian courts and international treaty mechanisms with an understanding of the pressures that cross-border investors face.
We work with companies at every stage of the dispute lifecycle, from pre-audit risk assessment through to enforcement and, where necessary, coordination with competent authority processes in other countries. Our engagement model is tailored to the complexity and urgency of each matter rather than applied as a standard template.
If you are facing a Belgian tax audit, have received an assessment you consider incorrect, or are managing a transfer pricing dispute with a cross-border dimension, we invite you to reach out to info@ferrazwhitmore.com. You can also find further details on how to contact us at our contacts page.
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.