HR Due Diligence in Germany: What Acquirers Need to Know

What HR Due Diligence in Germany Means

HR due diligence in Germany refers to the systematic review of a target company's people-related obligations, risks, and structures as part of a corporate acquisition or merger. It differs from HR due diligence in most other markets because German employment law creates several automatic consequences on change of ownership that cannot be negotiated away and can materially affect transaction economics. An acquirer who treats German HR due diligence as a standard employment review will miss obligations worth millions.

The three structural features that distinguish German HR due diligence from other markets are: automatic employment transfer under §613a BGB, mandatory works council consultation before closing, and pension entitlements that may have been promised informally and are nonetheless legally binding. Each requires targeted analysis.

§613a BGB: Automatic Employment Transfer

§613a BGB is the central provision governing employment consequences in German M&A. It establishes that when a business or business unit is transferred to a new owner, all employment relationships transfer automatically to the acquirer, on unchanged terms, with full continuity of service. Employees cannot be dismissed because of a transfer. Acquirers cannot impose new terms at the point of acquisition.

The due diligence implications are direct. The acquiring party inherits not just the employees visible in the org chart, but the full legal position of each employment relationship: the seniority-based notice periods, any individually agreed terms that exceed statutory minimums, long-service entitlements, and any commitments made in letters, email exchanges, or handshakes that were never reduced to a formal contract. In Germany, employment terms can be established through custom and practice in ways that become legally enforceable, even without a signed document.

For acquirers, the practical requirement is a full review of every employment contract alongside a verification of actual practice. If the target has been paying Christmas bonuses for twelve consecutive years, those payments may have become a binding commitment through the principle of betriebliche Übung, regardless of what the contracts say.

Works Council Obligations in the Transaction Process

If the target company has a Betriebsrat, the acquirer faces mandatory consultation obligations that must be completed before or around the transaction close. Under §111 BetrVG, any significant change to the business operation — including an acquisition or merger — triggers the employer's obligation to inform and consult the works council. This is not a formality.

The works council has the right to negotiate a social plan and an Interessenausgleich if the transaction will result in headcount reductions, site closures, or material changes to working conditions. These negotiations take time: a contested Interessenausgleich can take weeks to months, and if agreement is not reached, either party can invoke the Einigungsstelle, a formal arbitration body whose decisions are binding. An acquirer who does not factor this timeline into the deal process risks either closing without completing required consultation — which carries legal risk — or discovering late that the post-close reorganization will take considerably longer than planned.

Works council due diligence should cover: the composition and current dynamics of the Betriebsrat, any existing Betriebsvereinbarungen (works agreements) that bind the acquiring entity post-close, pending or anticipated disputes, and any history of litigation between management and the works council.

Pension Liabilities: The Hidden Exposure

Company pensions in Germany are a significant source of latent liability in acquisitions. Unlike defined contribution schemes in the UK or US, German company pensions are often defined benefit obligations that sit on the employer's balance sheet. The Betriebsrentengesetz (BetrAVG) governs occupational pensions and creates strict rules about vesting, preservation, and the consequences of insolvency.

Due diligence in this area requires an actuarial review of all pension obligations, including direct commitments, support fund schemes (Unterstützungskassen), and pension insurance contracts. The PSVaG (Pensions-Sicherungs-Verein) provides insolvency protection for most company pension schemes, but acquirers still inherit the full actuarial obligation.

A particular risk exists around informal pension commitments made to senior employees — sometimes documented only in a letter or board resolution, sometimes not formally documented at all. German courts have consistently upheld such commitments as legally binding. Due diligence must extend beyond the pension schedule in the data room.

Employment Contract Review: What to Look For

Standard employment contract review in German HR due diligence covers six areas: contract term and termination provisions, compensation structures including variable pay, non-compete clauses (which must be compensated in Germany to be enforceable), probationary periods for recent hires, reference to collective agreements (Tarifverträge), and any individual terms that diverge materially from standard contracts.

German employment law allows significant individual negotiation of employment terms, but places a floor that cannot be contracted below. The Mindestlohngesetz sets the statutory minimum wage; collective agreements in specific industries set sector-specific minimums that apply regardless of whether the employer is formally a member of the employers' association, if the agreement has been declared generally binding (allgemeinverbindlich) or if the target has reference clauses in its employment contracts.

Reference to a Tarifvertrag in employment contracts is a critical due diligence item. It means the acquirer may be bound to wage scales, working time rules, and termination procedures that are more restrictive than the statutory baseline.

Headcount and Compliance Review

Beyond individual employment terms, HR due diligence in Germany should cover three systemic compliance areas. First, working time: the Arbeitszeitgesetz sets maximum working hours, minimum rest periods, and Sunday working restrictions. German companies — particularly SMEs and startups — often have informal working practices that breach these requirements. Acquirers inherit any liability.

Second, the Nachweisgesetz (NachwG), amended in August 2022, requires written confirmation of key employment terms within seven days of commencement. Many companies are not fully compliant. Non-compliance creates administrative fine exposure.

Third, data protection: the BDSG and GDPR apply to employee personal data. HR data practices must be reviewed for lawfulness of processing, data retention policies, and — if a works council exists — any relevant Betriebsvereinbarungen governing employee monitoring or HR systems.

Structuring the HR Due Diligence Workstream

In a typical German M&A transaction, the HR due diligence workstream is led by either an external employment law firm or an experienced HR executive with transaction experience. The workstream runs in parallel with legal and financial due diligence and feeds into the representations and warranties structure in the SPA.

Acquirers consistently underestimate the time required to complete German HR due diligence properly. Six to eight weeks is a realistic minimum for a thorough review of a company with 50 to 500 employees. Larger or more complex targets — those with multiple works councils, multiple collective agreements, or significant pension obligations — require proportionally more time.

The key outputs from HR due diligence in a German transaction are: a risk register quantifying the key exposures, a list of representations and warranties required in the SPA, a recommendation on whether specific indemnities are needed, and a post-close HR integration plan that accounts for §613a BGB obligations, works council engagement timelines, and any people-related restructuring that is planned.

When to Engage HR Leadership Early

The most expensive HR due diligence failures in German transactions come from engaging HR expertise too late — after financial due diligence has concluded and term sheet economics have been fixed. If the actuarial pension review or the works council consultation analysis surfaces material liabilities after price is agreed, the acquirer either absorbs costs that were not priced in or renegotiates in a weakened position.

Engaging an experienced interim HR leader or HR adviser with specific German transaction experience at the start of the due diligence process — not at close — allows the full scope of HR risk to be assessed and priced correctly. It also means that the post-close HR integration workstream can be planned in advance, rather than begun under pressure after the ink is dry.