Disguised employee leasing (in German law, "verdeckte Arbeitnehmerüberlassung") happens when a contract is written as a service or works agreement, but in daily practice the external person is run like an in-house temporary worker – integrated into the client's organisation and subject to its instructions (Section 1(1) sentence 2 of the German Temporary Employment Act, Arbeitnehmerüberlassungsgesetz, AÜG). The consequences range from a void contract to a deemed employment relationship and fines.
This article covers exactly that violation: how it develops in daily work, how to spot it, what legal consequences follow, and how an ongoing practice review prevents it. The legal construction of employee leasing itself, and how it differs from a genuine works or service contract, is covered in the companion article Arbeitnehmerüberlassung; an overview of the law itself is in the AÜG explainer.
How does disguised employee leasing develop in everyday work?
In most cases it is not a deliberate scheme but gradual drift. The contract starts out clean as a works contract: a defined deliverable, the external provider's own supervisor, its own work organisation. In the day-to-day of the project, the client's team lead starts fine-tuning tasks directly, because routing everything through the external manager is slower. The person gets invited to the daily stand-up because they are "there anyway". They end up in the client's shift roster because running two separate planning systems is inconvenient. They get a company account because the client's IT department is faster than provisioning external access.
Each single adjustment looks harmless. Added up, the lived practice shifts from a defined deliverable to integration into someone else's work organisation, combined with being subject to that organisation's instructions – exactly the two criteria in Section 1(1) sentence 2 AÜG that turn a service or works contract into employee leasing. The contract itself never changes. That gap between the paper and the practice is the violation.
How do you recognise disguised employee leasing?
The law names two criteria: integration into the client's work organisation, and being subject to its instructions (Section 1(1) sentence 2 AÜG). Both together establish employee leasing, regardless of what the contract is called. Typical signals in practice:
- Day-to-day technical and disciplinary instructions come continuously from the client, not from the person's own employer.
- Working hours, location and breaks are set bindingly by the client, not by the person's own employer.
- The person could be swapped for any other available person without the assignment itself changing.
- Billing is based on time worked, not on a defined, accepted deliverable.
- There is no visible independent business organisation – no own tools, no own quality control, no own project management.
A single signal alone does not make an arrangement employee leasing. The assessment tips once several of these line up together.
What legal consequences follow from disguised employee leasing?
The contract becomes void
If the supposed contractor holds no permit under Section 1 AÜG, the contracts between the lender and the client, and between the lender and the affected worker, are void (Section 9(1) no. 1 AÜG). Since the labelling requirement was introduced, the same applies if the leasing was not explicitly designated as such and the worker was not identified by name in the contract (Section 9(1) no. 1a AÜG) – exactly the pattern in an arrangement labelled as a works contract but lived as leasing. Voidness does not occur if the affected worker declares in writing, within one month, to the Federal Employment Agency that they wish to remain with their original employer (a "Festhaltenserklärung", Section 9(2) and (3) AÜG).
An employment relationship with the client is deemed to exist
If the contract is void under Section 9 AÜG, an employment relationship between the client and the affected worker is deemed by law to have come into existence – retroactively, from the point the assignment was supposed to start (Section 10(1) AÜG). The worker is entitled at minimum to the pay agreed with the original contractor. The client becomes an employer involuntarily, with the full range of dismissal-protection, leave and pay consequences that follow.
Fines
Leasing workers without the permit required under Section 1 AÜG, or letting a leased worker perform work without that permit, is a regulatory offence; so is breaching the labelling or identification requirement (Section 16(1) nos. 1, 1a, 1c, 1d AÜG). The fine in these cases runs up to thirty thousand euros (Section 16(2) AÜG) – per individual case, not a flat cap for the whole company.
Loss of an existing permit
If the supposed contractor already holds a permit under Section 1 AÜG – for instance as a precaution for exactly this kind of case – the licensing authority can revoke it for the future if facts that came to light afterwards would justify refusing the permit today (Section 5(1) no. 3 AÜG). Grounds for refusal include a lack of reliability, for example failing to observe labour-law duties or the maximum leasing period (Section 3(1) no. 1 AÜG).
Back payment of social security contributions and possible criminal liability
If an employment relationship with the client is retroactively deemed to exist, the client was, from a social security perspective, the real employer from the start. A routine audit by the pension insurance authority can reclaim the corresponding contributions. Withholding social security contributions as an employer can be a criminal offence under the German rules on withholding and misappropriating pay – punishable by imprisonment of up to five years or a fine (Section 266a(1) of the German Criminal Code, StGB); in practice this falls on the personally responsible managing director, not the company as such.
This article summarises the legal position based on the statutory text and does not replace individual legal advice.
| Violation | Legal basis | Consequence |
|---|---|---|
| Leasing without a permit | Sec. 1, Sec. 9(1) no. 1, Sec. 16(1) no. 1 AÜG | Contract void, fine up to €30,000 |
| Missing labelling / identification | Sec. 1(1) s. 5 f., Sec. 9(1) no. 1a, Sec. 16(1) nos. 1c, 1d AÜG | Contract void, fine up to €30,000 |
| Contract is void | Sec. 10(1) AÜG | Employment relationship with the client deemed to exist |
| Existing permit, reliability lapses | Sec. 5(1) no. 3 in conjunction with Sec. 3(1) no. 1 AÜG | Permit revoked for the future |
| Social security contributions withheld | Sec. 266a(1) StGB | Imprisonment up to 5 years or a fine |
How do you check actual practice during an ongoing assignment?
Reviewing the contract is not enough – the wording can be flawless while daily practice has long since become employee leasing. This checklist therefore does not review the text but the lived practice, looking at exactly the two statutory criteria: integration and being subject to instructions.
| Observation | What it indicates | How to fix it cleanly |
|---|---|---|
| Who assigns the daily work – the person's own supervisor, or the client's manager? | Direct task assignment by the client is the core criterion of being subject to instructions under Section 1(1) sentence 2 AÜG. | Route tasks only through the person's own supervisor or a named project lead, in writing. |
| Who approves leave and other absences? | If the client approves it, the client is exercising an employer-like authority over personnel. | Keep leave approval with the person's own employer; inform the client only for capacity planning. |
| Is the person listed on the client's shift roster like permanent staff? | Fixed placement in someone else's staffing plan is integration into that organisation's work structure. | Keep an independent staffing plan; coordinate only delivery dates and milestones with the client. |
| Whose tools, equipment or software are used? | Consistent use of the client's equipment with no own contribution points against an independent business organisation. | Use the provider's own tools where possible; document any unavoidable exception as equipment supplied by the client. |
| Whose email address and signature does the person use externally? | A client account signals to the outside world that the person belongs to the client's organisation. | Use the provider's own company address; where a client account is technically required, mark the external role in the signature. |
| Is billing based on hours or on a defined deliverable? | Pure time-based billing with no link to a defined result points toward leasing, not a works contract. | Tie billing to clearly defined work packages or milestones with documented acceptance. |
| Does the person join the client's internal team meetings like their own staff? | Disciplinary inclusion in internal routines is a sign of integration. | Limit participation to project-related coordination meetings, never internal staffing topics. |
| Could the person be swapped for any other available person without the assignment changing? | Interchangeability like staffing points against a defined, person-independent deliverable. | Write the scope as a clearly defined, deliverable-based service, not general staff provision. |
| Does the contract's label match the lived practice, or is there a gap? | "Works contract" on paper against "instructions and integration" in practice is exactly the violation that triggers Section 9(1) no. 1a AÜG. | Compare practice against the contract at least every six months; either adjust the contract or bring practice back in line. |
How do you prevent disguised employee leasing on an ongoing basis?
Because the violation usually builds up over months rather than appearing on signing day, a one-off contract review does little. A recurring practice check is more effective: run the checklist above not only at onboarding but at regular intervals for as long as the assignment continues.
Second, a clear escalation path is needed: client-side managers who are used to assigning tasks directly to external people need to know that instructions have to go through the external provider's own management – that is a training issue, not a contract issue. Third, for providers who regularly place people on client sites, holding a permit under Section 1 AÜG is worth it: if an assignment tips into leasing despite every precaution, it becomes openly permitted leasing rather than a disguised, and therefore sanctionable, one. For the clauses a clean contract needs so paper and practice do not drift apart in the first place, see the companion article on the employee leasing agreement.
Frequently asked questions about disguised employee leasing
Is disguised employee leasing a criminal offence?
The breach of the permit or labelling requirement itself is a regulatory offence carrying a fine of up to €30,000 (Section 16 AÜG), not a crime. If social security contributions are withheld in the process, that can additionally be prosecuted as a separate criminal offence under Section 266a StGB, carrying imprisonment of up to five years.
Who is liable – the client or the supposed service provider?
Both carry risk. The supposed service provider is liable for the regulatory offence under Section 16 AÜG. The client additionally carries the risk of retroactively being deemed the employer under Section 10 AÜG, with every duty that follows from that.
Does the affected worker have to want to stay with the original contractor?
No, the opposite is the statutory default: without any action on their part, an employment relationship with the client applies automatically once the contract is void. Only a worker who explicitly declares in writing, within one month, to the Federal Employment Agency that they wish to remain under the original contract stays with the original employer (Section 9(2) and (3) AÜG).
What distinguishes disguised from open employee leasing?
Open employee leasing is permitted, explicitly labelled as such in the contract, and covered by a valid permit under Section 1 AÜG. Disguised employee leasing conceals exactly that – usually behind a contract labelled as a works or service agreement that is lived out differently in daily practice.
Does a well-drafted contract clause protect against the accusation?
No. Authorities and courts assess lived practice, not just the contract text. A works contract on paper does not change the legal classification if the person works, in practice, integrated into the client's organisation and subject to its instructions.
Can the collaboration continue after a misclassification is uncovered?
Yes, once the contract and practice match again – either as openly labelled employee leasing under a valid permit, or as a genuine works or service contract without integration or being subject to the client's instructions.
Jürgen Ulbrich
Jürgen Ulbrich has more than a decade of experience in developing and leading high-performing teams and companies. As an expert in employee referral programs as well as feedback and performance processes, Jürgen has helped over 100 organizations optimize their talent acquisition and development strategies.
