A foreign acquirer approaching a Belgian target for the first time often finds the process deceptively familiar. Belgium's corporate environment is sophisticated, its companies are internationally oriented, and the transaction documentation resembles what buyers encounter elsewhere in Western Europe. The reality is more demanding. Belgian corporate legislation, labour law, and tax rules each contain specific provisions that differ materially from equivalent regimes in Germany, the Netherlands, or the United Kingdom. Missing those differences at the due diligence stage routinely generates post-closing liabilities that restructuring alone cannot fix.
M&A due diligence in Belgium is a structured investigation of a target company's legal, financial, tax, and operational position, conducted before signing a share purchase agreement (SPA). The process typically spans four to twelve weeks depending on target complexity and data room readiness. Belgian corporate legislation – primarily the Wetboek van vennootschappen en verenigingen (Belgian Companies and Associations Code, BCAC) – governs the underlying corporate structures, shareholder rights, and board authorities that due diligence must verify.
This guide walks through each phase of due diligence for a Belgian acquisition: the procedural sequence, the documentary checklist. The closing conditions that flow from the findings. Additionally, the most common errors that foreign buyers make when working without a law firm in Belgium that understands local practice.
Understanding the Belgian legal environment for acquisitions
Belgium operates under a civil law tradition. Its corporate law system was substantially modernised in 2019, when the BCAC replaced earlier legislation and introduced flexible new rules on company types, shareholder agreements, and board governance. For a foreign acquirer, this reform has practical consequences. Provisions that existed in older Belgian company documentation may no longer reflect current statutory defaults. A due diligence exercise must therefore examine both the current statutory position and any legacy contractual arrangements that predate the reform.
The most common acquisition vehicle in Belgium is the naamloze vennootschap (NV, public limited company) or the besloten vennootschap (BV, private limited company). The BV is the standard choice for closely held businesses. Under Belgian corporate legislation, a BV has no minimum capital requirement since the 2019 reform, but its founders must demonstrate adequate financial means at incorporation through a formal financial plan. A buyer should verify whether that financial plan was properly prepared. If it was deficient, Belgian civil law creates potential liability for founders – and, in some scenarios, for a successor company.
Belgian competition legislation adds a parallel layer. Transactions above certain turnover thresholds require notification to the Belgische Mededingingsautoriteit (Belgian Competition Authority, BCA). Merger control clearance is a standard closing condition in any transaction that reaches those thresholds. The BCA review period in a straightforward case runs approximately six weeks from a complete filing. Deals involving regulated sectors – financial services, energy, telecommunications – may also require approval from a sectoral regulator, adding further time and documentary requirements.
Belgium's employment legislation is particularly consequential for acquirers. The country has one of the more prescriptive collective labour relations systems in the EU. Targets with a workforce above a defined threshold must have a works council (ondernemingsraad or conseil d'entreprise) and a committee for prevention and protection at work. Those bodies must be informed and, in some cases, consulted before certain decisions can be taken. A change of control does not automatically trigger a mandatory consultation, but restructuring plans following closing often do. Understanding what consultation rights exist before signing protects a buyer from post-closing delays.
Step-by-step due diligence process and documentary checklist
Due diligence in Belgium follows a sequence that is broadly consistent with international M&A practice, but each step contains Belgium-specific checkpoints. The following covers the principal stages and the documents required at each.
Step 1 – Corporate and governance review (weeks one to two)
The starting point is the target's corporate register filing. Belgian companies are registered in the Kruispuntbank van Ondernemingen (KBO, Crossroads Bank for Enterprises). The KBO contains publicly accessible data on the company's identity, registered address, legal form, and statutory purposes. A buyer should obtain a certified extract from the KBO as the baseline document.
From that baseline, the corporate review expands to cover the target's articles of association, any shareholders' agreement, board resolutions, general meeting minutes for the past three to five years, and the register of shares. Under Belgian corporate legislation, share transfers in a BV must be recorded in the share register to be effective against the company. A buyer must verify that the register is current and that it reflects the ownership structure represented by the seller.
Key documents to request at this stage:
- Certified KBO extract and deed of incorporation (oprichtingsakte)
- Consolidated articles of association, including all amendments
- Shareholders' agreement and any side letters
- Board and general meeting minutes for the past three to five years
- Share register and any pledge registers
Step 2 – Financial and tax due diligence (weeks two to four)
Belgian tax legislation imposes specific obligations on companies relating to corporate income tax, VAT, and payroll taxes. A buyer should review the target's tax returns, tax assessment notices, and any correspondence with the Federale Overheidsdienst Financiën (Belgian federal tax authority) for the past five years. Open tax assessments and ongoing audits are a standard risk area. Belgium's tax legislation permits the tax authority to reassess company returns within a standard period, which extends in cases involving fraud or incomplete disclosure.
Transfer pricing is a significant concern for Belgian subsidiaries of international groups. Belgian tax legislation contains detailed rules on intra-group pricing that align with OECD guidelines but have domestic enforcement characteristics. A buyer acquiring a Belgian subsidiary from a multinational must verify that the target's transfer pricing documentation is complete and that intercompany pricing has been consistent.
Financial documents to request:
- Audited annual accounts for the past three to five years
- Corporate income tax returns and notices of assessment
- VAT declarations and any outstanding VAT liabilities
- Transfer pricing master file and local file, if applicable
- Details of any ongoing tax disputes or open audit proceedings
Step 3 – Employment and social law review (weeks three to five)
Employment due diligence in Belgium covers individual employment contracts, collective bargaining agreements (CBAs) at sector and company level, the status of any works council or trade union delegation, and the target's history of social inspections. Belgium has approximately 150 joint committees (paritaire comités), each setting minimum conditions for a defined sector. The target's employees fall under one or more of these committees, and the applicable CBA determines minimum wages, notice periods, and conditions for dismissal.
A common error by foreign acquirers is to assume that Belgian employment conditions can be harmonised upward or downward after closing by simple agreement with employees. In practice, Belgian employment legislation and applicable CBAs set floors that are not contractually waivable at individual level. Any post-closing harmonisation requires a restructuring process with defined consultation obligations.
Pension and supplementary benefit arrangements also require specific review. Many Belgian employers operate group insurance plans (groepsverzekering) under Belgian pension legislation. The funded status of those plans and any employer obligations for guaranteed return on defined contribution arrangements must be verified before closing.
For a detailed view of how Belgian corporate governance intersects with employment obligations, see the firm's overview of corporate law matters in Belgium.
Step 4 – Contractual and IP review (weeks four to six)
The contractual review covers material commercial agreements, including customer contracts, supplier agreements, distribution and agency arrangements, and real estate leases. Under Belgian commercial legislation, commercial agency agreements have mandatory statutory protections for agents on termination. If the target uses a commercial agent network, the buyer must assess the cost of terminating those arrangements post-closing.
Intellectual property assets are registered in Belgium through the Intellectual Property Office and, for EU-wide rights, through the EUIPO. Buyers should verify that the target's registered IP is in the target entity rather than a related party, and that licences are transferable on change of control. A change-of-control clause in a key IP licence that allows termination on acquisition can materially affect deal value.
To receive an expert assessment of your transaction's due diligence requirements in Belgium, contact us at info@ferrazwhitmore.com.
Representations, warranties, and closing conditions in a Belgian SPA
The share purchase agreement (SPA) translates the due diligence findings into contractual protections. In Belgium, SPAs are typically governed by Belgian law and drafted in French, Dutch, or English depending on the parties. The representations and warranties section allocates risk between buyer and seller based on what the due diligence revealed.
Under Belgian civil law, the remedies available to a buyer for breach of representations and warranties are anchored in general contract law principles. The standard remedy is damages. Unlike English law, Belgian civil law does not readily imply conditions precedent into commercial contracts – closing conditions must be expressly drafted. A buyer relying on implied rights of rescission without express contractual language faces a difficult legal position before Belgian courts.
Standard closing conditions in a Belgian acquisition include:
- Regulatory approvals – BCA merger clearance and any sectoral authorisations
- Third-party consents – change-of-control consents from key counterparties
- Completion of tax and social security clearance procedures
- Seller representations remaining true at closing
- No material adverse change (MAC) event occurring between signing and closing
The MAC clause requires particular attention in Belgian transactions. Belgian civil law does not contain a concept equivalent to the English doctrine of material adverse change as a freestanding right. The MAC must therefore be carefully defined in the SPA to identify the specific events – revenue decline thresholds, loss of key customers, regulatory sanctions – that constitute a trigger. A vaguely drafted MAC clause is difficult to invoke and rarely succeeds before Belgian courts without express, objective criteria.
Limitation periods for warranty claims under Belgian civil law differ from those a common law buyer expects. Belgian civil law applies general limitation rules unless the SPA expressly provides shorter contractual periods. Buyers should also assess whether warranty and indemnity (W&I) insurance is appropriate for the transaction. W&I insurance is available in the Belgian market. It has become a standard feature of competitive processes, particularly where sellers seek a clean exit.
Buyers working across the Iberian peninsula and Belgium will find a comparable analysis of deal structuring in our M&A due diligence guide for Portugal. This addresses how civil law SPA mechanics operate in a neighbouring jurisdiction.
For a tailored strategy on structuring your SPA and closing conditions for a Belgian acquisition, reach out to info@ferrazwhitmore.com.
Self-assessment checklist before initiating Belgian due diligence
Belgian M&A due diligence is the appropriate approach if the following conditions are met:
- The target is incorporated in Belgium as a BV, NV, or another Belgian legal form
- The transaction involves a share transfer rather than an asset deal
- The buyer requires legal certainty on representations and warranties enforceable under Belgian law
- The target's turnover or the combined group's turnover may reach Belgian or EU merger control thresholds
- The target employs staff covered by Belgian collective bargaining arrangements
Before initiating the process, verify the following:
- The data room is organised around Belgian document categories, not another jurisdiction's standard
- The KBO extract is current and matches the ownership structure in the share register
- The seller can produce audited accounts for at least the past three years
- All applicable CBA references have been identified for the target's workforce
- Key commercial contracts have been reviewed for change-of-control clauses
When the target is an asset-heavy business – real estate, manufacturing equipment, or licensed operations – an asset deal structure may offer advantages over a share acquisition in terms of selective liability assumption. Belgian commercial legislation permits both structures, but each carries distinct VAT, transfer tax, and employment consequences that a structural comparison must address before any due diligence mandate is scoped. Engaging a law firm in Belgium with M&A transaction experience is the most reliable way to identify which structure best fits the commercial objective.
For international buyers considering acquisitions across multiple European jurisdictions, our M&A advisory services in Belgium provide integrated support from scoping through to post-closing integration.
Frequently asked questions
Q: How long does M&A due diligence typically take in Belgium?
A: For a mid-size Belgian target, the due diligence phase typically runs between four and eight weeks, depending on the complexity of the business and the completeness of the data room. Targets with multi-jurisdictional operations or significant regulatory exposure can extend this timeline to twelve weeks or beyond. Engaging a lawyer in Belgium with prior transaction experience is the most effective way to manage the process efficiently.
Q: Are representations and warranties in a Belgian SPA enforceable in the same way as under English law?
A: A common misconception among common law-trained buyers is that Belgian representations and warranties operate identically to their English equivalents. Under Belgian corporate legislation and civil law principles, the remedies and limitation periods for warranty claims follow civil law rules, which differ materially from English law concepts. Buyers should not import standard English-law warranty schedules without adapting them to the Belgian legal environment.
Q: What costs should a foreign acquirer budget for due diligence in Belgium?
A: Legal fees for a full due diligence exercise in Belgium start in the tens of thousands of euros for a straightforward transaction and can reach into six figures for complex or regulated targets. Additional costs include financial and tax advisor fees, notarial costs for any deed-based steps, and potential competition filing fees if merger control thresholds are triggered. Buyers who underestimate the cost of due diligence often face larger remediation costs after closing.
About Ferraz & Whitmore
Ferraz & Whitmore is an international law firm based in Lisbon, advising business clients across 46 jurisdictions. Our team combines Portuguese civil law expertise with English common law tradition to deliver cross-border legal solutions in M&A transactions, including due diligence, SPA negotiation, and post-closing integration across Belgium and the broader EU. As an international law firm in Belgium and across Europe, we work with international entrepreneurs, institutional investors, and in-house legal teams navigating acquisitions in civil law systems. The firm's M&A practice covers jurisdictions across Europe, the Americas, and Asia, supported by a network of local counsel experienced in Belgian corporate and employment legislation. Our attorneys have advised on share acquisition and asset deal transactions across both civil law and common law systems, including matters requiring Belgian Competition Authority engagement. To discuss how due diligence requirements apply to your acquisition in Belgium, 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.