Betriebsübergang (transfer of Undertaking) vs Outsourcing: Who Bears Employee Liabilities in Cross-border M&A Involving German Entities?

Betriebsübergang transfer undertaking vs outsourcing who bears the resulting employee liabilities is one of the most consequential questions any deal team faces when a German entity is bought, sold, carved out or restructured. The answer determines whether employees move automatically to a new employer, whether the buyer inherits historic wage and holiday claims, and whether a routine service contract quietly becomes a statutory transfer of undertaking under §613a of the German Civil Code (Bürgerliches Gesetzbuch, or BGB). In 2026, with cross-border consolidation, carve-outs and supplier transitions accelerating across Europe, in-house counsel and M&A teams need a clear framework for distinguishing a genuine transfer of undertaking from ordinary outsourcing.

This guide sets out the statutory and EU law tests, shows how employee liabilities allocate, explains the mandatory information and works council process, and provides practical drafting protections for both buyers and sellers.

Executive summary, key takeaways

The core issue in the Betriebsübergang transfer undertaking vs outsourcing who-pays debate is whether an economic entity retains its identity when it moves from one operator to another. The practical consequences follow from that single legal test.

• Transfer occurs when identity is preserved. A Betriebsübergang under §613a BGB is triggered where an economic entity, a set of assets, workforce and customers organised to pursue an economic activity, passes to a new operator by legal transaction while retaining its identity.
• Outsourcing can trigger a transfer. A service contract is not automatically a transfer, but where key staff, equipment and customer relationships move to the supplier, the arrangement may amount to a transfer of undertaking.
• Buyers inherit liabilities. On a transfer, employment relationships pass automatically to the acquirer, who becomes liable for pre-transfer claims such as unpaid wages, holiday entitlement and continuity of service, subject to statutory rules.
• Information and works council steps are mandatory. Affected employees must be informed in writing before the transfer under §613a(5) BGB, and works council participation rights under the Works Constitution Act (Betriebsverfassungsgesetz, or BetrVG) must be observed.
• Contractual protection is essential. Because statutory allocation cannot be varied to the employee’s detriment, buyers rely on indemnities, escrows, warranties and price adjustments to manage exposure.
• Cross-border deals add complexity. German mandatory labour law applies to employees based in Germany regardless of the governing law chosen for the transaction documents.

Legal framework, §613a BGB, the Acquired Rights Directive and the CJEU test

Understanding the Betriebsübergang transfer undertaking vs outsourcing who-bears-liability question begins with the interaction of German statute, EU law and Court of Justice of the European Union (CJEU) jurisprudence. German transfer law does not operate in isolation: §613a BGB implements Council Directive 2001/23/EC, the Acquired Rights Directive, and German courts interpret the domestic provision consistently with the Directive and CJEU rulings.

§613a BGB, text and immediate legal effect

§613a BGB provides that where a business or part of a business passes to another owner by legal transaction, the new owner steps into the rights and obligations arising from the employment relationships existing at the time of transfer. In practical terms, the employment contracts of the affected employees move automatically to the transferee by operation of law, no individual assignment or consent is required, though employees have a statutory right to object. The transferee assumes the terms and conditions in place at the moment of transfer, including seniority and accrued entitlements. §613a(4) BGB renders void any dismissal of an employee by reason of the transfer itself, though dismissals for other reasons remain possible.

§613a(5) BGB requires that affected employees be informed in writing before the transfer takes place. Crucially, these protections are mandatory and cannot be excluded or reduced by contract between the seller and buyer to the detriment of employees.

EU law and CJEU precedent, Süzen and the identity test

The Acquired Rights Directive (2001/23/EC) sets the minimum standard of protection for employees on transfers of undertakings across the EU. Its central concept, the transfer of an economic entity that retains its identity, was addressed by the CJEU in Süzen v Zehnacker Gebäudereinigung GmbH (C-13/95). In that decision, the Court held that the mere loss of a service contract to a competitor does not, by itself, constitute a transfer of undertaking. What matters is whether an economic entity, an organised grouping of resources with the objective of pursuing an economic activity, is transferred and retains its identity after the change of operator.

The Court identified factors to be assessed as a whole: the type of undertaking, whether tangible or intangible assets are transferred, whether the majority of the workforce is taken over, whether customers are transferred, the degree of similarity of activities before and after, and any suspension of the activity. In labour-intensive sectors, where an activity rests essentially on manpower, the taking over of a major part of the workforce (in terms of numbers and skills) can itself point to a transfer.

Betriebsübergang transfer undertaking vs outsourcing who, the practical comparison

For transactional teams, the decisive practical question in the Betriebsübergang transfer undertaking vs outsourcing who-pays analysis is whether the facts of a given deal cross the threshold from a service arrangement into a statutory transfer. The label the parties choose is irrelevant; German courts and the CJEU look at substance. The same commercial objective, moving a function from one operator to another, can be structured so that it either triggers §613a BGB or falls outside it, with very different consequences for employee liabilities.

Typical outsourcing facts that do not amount to a transfer

Pure service contracting generally does not amount to a transfer of undertaking. Where a principal engages an independent supplier to deliver a service using the supplier’s own staff, methods and equipment, and no assets, workforce or customer base pass from the principal, there is no economic entity that retains its identity. Classic examples include appointing a new cleaning contractor who brings its own personnel and materials, or contracting an IT provider that runs the service from its own infrastructure. In these scenarios the principal’s employees, if any, remain employed by the principal, and the supplier remains liable for its own workforce. The absence of continuity of the organised resources is the key indicator that §613a BGB is not engaged.

Facts that point towards a transfer

Conversely, an arrangement labelled “outsourcing” may in substance be a transfer where the operational identity is preserved. Indicators include the transfer of significant tangible assets (machinery, premises, IT systems), the taking over of a major part of the dedicated workforce, the continuation of the same customer relationships, and seamless continuity of the same activity. If a company outsources its logistics function and the supplier takes on the existing warehouse team, uses the same equipment and serves the same customers without interruption, the essential identity of the economic entity is likely to have been retained, and the employees may transfer automatically under §613a BGB.

The CJEU’s guidance in Süzen remains an anchor: in an activity based essentially on manpower, a group of workers engaged in a joint activity on a permanent basis may constitute an economic entity, such that the entity retains its identity where the new operator takes over a major part of the workforce, in terms of numbers and skills. German case law from the Bundesarbeitsgericht (Federal Labour Court) applies these criteria to concrete facts, weighing the indicators cumulatively rather than treating any single factor as decisive.

Who bears which employee liabilities?

Once a transfer is established, the Betriebsübergang transfer undertaking vs outsourcing who-is-liable analysis turns to the specific categories of employee liability and how each allocates between transferor and transferee. §613a BGB sets the statutory baseline, but the treatment differs across wage claims, collective arrangements, pensions and insolvency scenarios.

Pre-transfer wage and employment claims

On a transfer of undertaking, the transferee steps into the rights and obligations of the existing employment relationships. This means the acquirer generally becomes liable for accrued but unpaid wages, holiday entitlement, bonuses that have crystallised, and other contractual claims that exist at the moment of transfer. Seniority carries over, which affects notice periods, protection against dismissal and severance calculations. §613a(2) BGB also provides for joint and several liability between transferor and transferee for obligations that arose before the transfer and fall due within a defined period after it, so that both parties may remain exposed for certain historic claims.

Because these allocations flow from statute, they cannot be contracted away as against the employee, which is precisely why buyers insist on indemnities from sellers to shift the economic burden.

Collective bargaining and pension issues

Collective agreements and works agreements that governed the employment relationships before the transfer continue to apply to transferred employees, with §613a(1) BGB providing that the relevant terms become part of the individual employment relationship and generally may not be changed to the employee’s detriment for a protected period after the transfer. Occupational pension commitments require careful analysis: the transferee generally assumes accrued occupational pension obligations connected with the transferred employment, subject to the terms of the relevant scheme and any statutory protections. This is a common area of hidden liability in cross-border deals, where the transferor’s pension arrangements may not be fully understood by an incoming international buyer.

Thorough due diligence on collective agreements and pension exposure is therefore essential before signing.

Employer insolvency and claims

The position shifts in insolvency. German and EU law recognise that the ordinary transfer regime is modified where the transferor is subject to insolvency proceedings, reflecting the policy goal of preserving businesses and jobs while balancing creditor interests. Under established case law, certain pre-insolvency liabilities may not pass to the transferee in the same way as on a solvent transfer, and specialist advice is required because the interaction between transfer protection and insolvency law is complex and fact-sensitive. Buyers acquiring a distressed German business should treat the employee liability position as a distinct workstream and not assume the standard §613a allocation applies unchanged.

Mandatory information and works council consultation, process, timings and risks

The procedural dimension of the Betriebsübergang transfer undertaking vs outsourcing who-must-do-what question is often underestimated by international parties. German law imposes strict information duties on affected employees under §613a(5) BGB and, separately, participation rights for the works council under the BetrVG. Failure to comply carries real consequences for timing and liability.

Content of information and required documents

Before a transfer of undertaking, affected employees must be informed in writing about the transfer. Under §613a(5) BGB, the information must cover the date or planned date of the transfer, the reason for it, the legal, economic and social consequences for the employees, and any measures envisaged in relation to them. The notification must be sufficiently clear and complete to enable employees to understand their position and to make an informed decision about whether to object. Incomplete or inaccurate information is a frequent source of dispute, because a defective notice can affect the running of the period within which employees may exercise their right to object.

Timing, works council participation and sanctions for non-compliance

The employee information obligation must be discharged before the transfer takes effect. Separately, where a works council exists, it holds participation rights under the BetrVG in relation to operational changes and restructuring (a Betriebsänderung), which may require consultation and, in some cases, negotiation of a reconciliation of interests (Interessenausgleich) and a social plan (Sozialplan). Non-compliance carries several risks: employees who are not properly informed may retain the ability to object to the transfer for an extended period beyond the ordinary window, creating uncertainty for the acquirer; and disregarding works council rights can expose the business to disputes that delay or disrupt the transaction.

For cross-border teams, the practical message is that German procedural steps cannot be treated as formalities to be completed after closing.

A short procedural timeline helps deal teams stay on track:

• Identify affected employees and confirm whether a transfer of undertaking is triggered.
• Engage the works council early where operational changes are planned.
• Prepare complete, accurate written information for affected employees covering date, reason, consequences and measures.
• Deliver the information before the transfer date and retain proof of delivery.
• Track the objection window and manage any objections before closing where possible.

Practical protections for buyers and sellers in cross-border M&A

Because statutory allocation under §613a BGB cannot be varied to the detriment of employees, the Betriebsübergang transfer undertaking vs outsourcing who-ultimately-pays outcome is managed contractually between the parties rather than by displacing the statute. Well-drafted transaction documents shift the economic burden of employee liabilities to the party that should bear it and provide security for that allocation.

Sample indemnity and warranty protections

In asset purchase agreements (APAs), share purchase agreements (SPAs) and outsourcing or transition contracts, buyers should seek a layered package of protections:

• Representations and warranties. Seller confirmations on the identity and status of employees, existing collective agreements and works agreements, pension commitments, outstanding wage and holiday claims, and pending or threatened employment disputes.
• Specific indemnities. Standalone indemnities for identified and unknown legacy employee liabilities, including pre-transfer claims that pass to the buyer by operation of §613a BGB, expressed to survive completion for a defined period.
• Escrows and holdbacks. Retention of part of the purchase price in escrow to secure the seller’s indemnity and warranty obligations, with agreed release mechanics.
• Purchase price adjustments. Adjustment mechanisms to reflect contingent employee liabilities quantified during due diligence, such as accrued holiday, bonus provisions and pension shortfalls.
• Transition arrangements. In outsourcing and carve-out deals, transition service agreements and clear novation provisions to manage the period around the change of operator.
• Insurance. Warranty and indemnity insurance to cover unknown liabilities where the parties cannot agree on a satisfactory allocation.

Practical negotiation points

Negotiations typically centre on the scope, cap, threshold (basket) and survival period of the employment indemnities. Buyers argue that statutory pre-transfer liabilities are the seller’s responsibility and press for uncapped or higher-capped specific indemnities and longer survival periods, given that some employee claims surface well after completion. Sellers seek to limit exposure through caps, de minimis and basket thresholds, and shorter survival windows. The size and duration of any escrow, and the conditions for release, are frequently the decisive commercial levers. In cross-border deals, parties should also address which forum will hear disputes over employment indemnities and ensure that the indemnity architecture works alongside mandatory German labour protections that cannot be contracted away.

Cross-border complications and practical tips

Where the buyer or seller sits outside Germany, additional layers apply. Regardless of the governing law chosen for the SPA or APA, German mandatory labour law, including the §613a BGB transfer regime and works council rights, continues to apply to employees based in Germany. Parties should not assume that selecting a foreign governing law neutralises German transfer obligations. Multi-jurisdictional pension schemes require particular care, because obligations linked to transferred employees may straddle several regimes with different funding and protection rules. Employee data transferred as part of due diligence and integration must be handled in line with applicable data protection requirements, including the EU General Data Protection Regulation and the German Federal Data Protection Act (Bundesdatenschutzgesetz).

The practical tip for international deal teams is to run the German employment analysis as a discrete workstream, coordinated with, but not subordinated to, the wider transaction, and to involve German-qualified employment advisers before the deal structure is fixed.

Procedure checklist for transactions involving German entities

A disciplined sequence keeps the transfer analysis on track from due diligence through to post-closing integration:

1. Pre-sign. Conduct HR due diligence, review employment contracts, collective and works agreements, pension commitments, headcount and any pending disputes; assess whether the transaction triggers a Betriebsübergang or is genuine outsourcing.
2. Signing. Lock in warranties, specific indemnities, escrow and price adjustment mechanics tailored to the identified employee liabilities; agree the information and consultation plan.
3. Closing. Complete the mandatory written information to affected employees before the transfer date; observe works council participation rights and complete any required consultation.
4. Post-closing. Manage employee objections and integration, honour transferred collective and pension arrangements, and monitor indemnity and escrow positions as claims emerge.

Key takeaways and recommended next steps

The Betriebsübergang transfer undertaking vs outsourcing who-bears-liability question ultimately turns on a single legal test, whether an economic entity retains its identity when it changes operator, with far-reaching consequences for who inherits employees and their historic claims. In cross-border M&A involving German entities, deal teams should identify early whether a transaction triggers §613a BGB, quantify the resulting employee liabilities through focused due diligence, comply strictly with the mandatory information and works council process, and lock in robust contractual protections through warranties, specific indemnities, escrows and price adjustments.

Because German mandatory labour law applies to employees based in Germany whatever the governing law of the deal, and because the statutory allocation cannot be contracted away as against employees, specialist German employment advice should be engaged before the deal structure is fixed. For transaction-specific guidance, businesses can consult International Employment lawyers in Germany through Global Law Experts.

Sources

1. Bürgerliches Gesetzbuch (BGB), §613a (Transfer of Undertakings)
2. Betriebsverfassungsgesetz (BetrVG), Works Constitution Act
3. Council Directive 2001/23/EC (Acquired Rights Directive)
4. CJEU, Süzen v Zehnacker Gebäudereinigung GmbH (C-13/95)
5. Bundesarbeitsgericht (Federal Labour Court)
6. Bundesministerium für Arbeit und Soziales (BMAS), Labour Law Guidance
7. European Commission, Employment and Social Policy