Betriebsübergang and §613a BGB: What Every HR Leader Needs to Know About M&A in Germany

What Is §613a BGB?

§613a BGB is Germany's statutory rule governing the automatic transfer of employment relationships when a business or business unit is sold or transferred. It has been in force since 1972 and implements what is now the EU Business Transfers Directive (2001/23/EC). Germany's statutory framework predates the directive and, in several respects, goes further. The core principle is straightforward: when a Betriebsübergang (business transfer) occurs, all employment relationships existing in the transferred entity or business unit automatically transfer to the acquiring party on the same terms. The acquirer steps into the shoes of the seller with respect to every affected employment contract, including salary, seniority, vacation entitlement, contractual benefits, and any individual agreements made over the course of employment. Neither the seller nor the acquirer can agree to alter these terms as a condition of the transfer. This is a mandatory statutory rule; it cannot be contracted away.

What Triggers a Betriebsübergang?

A Betriebsübergang is triggered when a business or an identifiable business unit transfers to a new owner by legal transaction and retains its identity after the transfer. The retention of identity test is critical and has been extensively developed through case law from both the European Court of Justice (in particular Spijkers, C-24/85) and the German Federal Labour Court (Bundesarbeitsgericht). Whether an operation retains its identity depends on factors including the nature of the business, whether tangible or intangible assets are transferred, whether customers transfer, whether the majority of the workforce is taken over, and whether similar activities are carried on before and after the transfer. Importantly, the legal form of the transaction is not determinative. What matters is the economic reality of what transferred. This means that even outsourcing arrangements, insourcing decisions, and franchise transfers can constitute a Betriebsübergang, regardless of how the transaction is structured on paper.

Asset Deal vs. Share Deal: A Critical Distinction

The distinction between an asset deal and a share deal is fundamental in the context of §613a BGB. In an asset deal, the business or business unit itself changes hands, and §613a BGB is directly triggered. All employment relationships in the transferred entity transfer automatically to the acquirer. In a share deal, the company's shares change hands but the legal entity remains unchanged. The employer of record does not change, and §613a BGB is not triggered. This distinction has significant structural implications for M&A transactions involving German businesses. Acquirers who want to avoid the automatic transfer of all employees, perhaps because they intend to restructure, need to understand that a share deal does not eliminate employment obligations; it merely defers them to within the acquired entity. Conversely, sellers in asset deal structures need to understand that they cannot agree with the acquirer to leave certain employees behind unless those employees exercise their statutory right to object.

The Employee's Right to Object

The most strategically significant and frequently underestimated aspect of §613a BGB is the employee's right to refuse the transfer. Each employee individually has the right to object to the transfer of their employment relationship to the acquirer. If they exercise this right within the applicable deadline, their employment remains with the seller. The deadline for exercising the right to object is one month from receipt of the statutory notification. This right creates a complex dynamic in M&A transactions. Employees who prefer to remain with the seller, perhaps because the acquirer is unknown, less stable, or proposes a different working environment, can exercise the right to object and remain employed by the seller. However, if the seller has no suitable position available for them, they face dismissal from the seller rather than transfer to the acquirer. The right to object is therefore not cost-free for the employee, but it is a genuine right that must be respected in transaction planning.

The Notification Obligation

Before a Betriebsübergang takes effect, both the seller and the acquirer have a joint statutory obligation to notify all affected employees in writing. The notification must be comprehensive: German case law requires that it contain at minimum the planned date of the transfer, the reason for the transfer, the legal, economic, and social consequences of the transfer for the employees, the measures planned with respect to the employees, and the acquirer's identity and registered address. Failure to provide a legally compliant notification has serious consequences: the one-month objection deadline does not begin to run until a compliant notification has been provided. This means that employees who receive inadequate notification retain their right to object potentially for years after the transfer, creating ongoing legal uncertainty for the acquirer. Getting the notification right is therefore not a formality; it is a legal risk management imperative. The notification must be drafted carefully, reviewed by legal counsel, and issued before the transfer date.

Implications for Due Diligence

§613a BGB profoundly shapes the HR due diligence process in German M&A transactions. In an asset deal, the acquirer is inheriting not just the employees who are currently employed but every right and obligation embedded in those employment contracts, including legacy agreements, supplementary contractual commitments, long-service entitlements, and any ongoing disputes or claims. An HR due diligence process in Germany must therefore go beyond headcount and cost. It must map individual employment terms, identify any contractual arrangements that differ from company policy, understand the works council situation, and quantify the cost of any pending or likely legal disputes. Acquirers who rely on financial due diligence alone and treat HR as secondary consistently find themselves absorbing liabilities that were not priced into the transaction. The quality of HR due diligence in a German asset deal is directly correlated with the acquirer's ability to integrate effectively and avoid post-closing surprises.

Works Council Rights in a Betriebsübergang

Where a works council exists in the transferring entity, it has a set of statutory rights that must be respected throughout the Betriebsübergang process. Under §111 BetrVG, the works council must be informed and consulted on any fundamental change to the business, and a Betriebsübergang almost invariably qualifies. Where the transfer involves restructuring measures affecting the workforce, the employer is obliged to negotiate an Interessenausgleich (the plan for the restructuring) and, where employees suffer economic disadvantages, a Sozialplan (the compensation plan). The works council cannot prevent the transfer from occurring, but it can significantly influence the terms on which it happens, the timeline, and the treatment of affected employees. Experienced HR leadership understands the works council not as an adversary but as a party whose involvement, if managed constructively, produces outcomes that are more durable and less likely to result in subsequent legal challenge.

Sozialplan and Interessenausgleich in a Business Transfer

When a Betriebsübergang is accompanied by restructuring, which is common when an acquirer plans to integrate the transferred business into an existing operation, the obligations around Interessenausgleich and Sozialplan become directly relevant. The Interessenausgleich is the agreement between employer and works council about whether and how the restructuring will take place and which employees will be affected. It is not legally enforceable in the same way as a Sozialplan, but failure to attempt to negotiate one entitles the works council to seek injunctive relief and gives affected employees stronger claims for compensation. The Sozialplan, by contrast, is a binding agreement that must be negotiated (and, if the parties cannot agree, can be referred to a conciliation board). Planning the timeline for these negotiations, which can realistically take eight to sixteen weeks in complex situations, must be built into the transaction schedule from the outset, not treated as a post-signing task.

Common Mistakes Acquirers Make

The most common mistakes acquirers make in German business transfers fall into a predictable pattern. The first is failing to conduct adequate HR due diligence, treating employee liabilities as a rounding error rather than a material line item. The second is issuing a legally deficient employee notification, which leaves the right-to-object window permanently open and creates ongoing uncertainty. The third is assuming that the acquirer can renegotiate employment terms as part of the integration. §613a BGB prevents any variation of terms agreed as a condition of the transfer, and attempts to do so expose the acquirer to significant legal liability. The fourth is underestimating the works council's role and treating it as a compliance checkpoint rather than a genuine stakeholder. The fifth, and perhaps most consequential, is failing to plan for the possibility that a significant number of employees will exercise their right to object, leaving the seller with a workforce it cannot absorb and the acquirer short of the people it needed.

How Experienced HR Leadership Navigates This

An experienced senior HR leader in a Betriebsübergang transaction provides three things that cannot be sourced from legal counsel alone. The first is practical knowledge of how the process actually unfolds: the sequencing of notifications, works council meetings, and integration activities in real time. The second is the ability to translate the legal framework into a communication and change management approach that the workforce can understand and trust. The third is the relationship capability to work with the works council constructively rather than adversarially. Legal advisors define the boundaries; experienced HR leadership operates within them to produce outcomes that hold. In cross-border transactions where the acquirer is not German, this expertise is especially critical. The gap between what acquirers assume is possible and what German employment law actually requires is consistently the source of the most expensive post-closing disputes.