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Customs came to the business: when undeclared work becomes a criminal offence
- Author
- Rechtsanwältin Virginia Elisabeth von Burgsdorff
- Published
- Last updated
- Topics
- Business
- 7 minute read
- 7 minute read
Not every instance of Schwarzarbeit, undeclared work, is a criminal offence. The Schwarzarbeitsbekämpfungsgesetz, the Act to Combat Undeclared Work (SchwarzArbG), punishes a large part of the breaches as regulatory offences carrying a regulatory fine (§ 8 SchwarzArbG). It becomes a criminal offence where social security contributions are withheld (§ 266a StGB, the Strafgesetzbuch, the German Criminal Code), where wage tax is evaded (§ 370 AO, the Abgabenordnung, the German Fiscal Code), or where somebody is deceived and thereby suffers loss (§ 263 StGB). What penalty is on the table in a case of undeclared work therefore depends on which of these allegations is raised, and after an inspection by the customs authorities that is as a rule not yet settled.
What is the customs authority actually allowed to do?
Checking compliance with obligations under social security law is a matter for the authorities of the customs administration (§ 2 Abs. 1 SchwarzArbG; Abs. is the German abbreviation for the subsection of a provision). They check, among other things, whether reporting obligations have been met, whether social benefits are being drawn without entitlement, and whether minimum wage rules are being observed. Tax obligations fall to the regional tax authorities, and business registration and entry in the Handwerksrolle, the register of skilled crafts, to the competent regional authorities.
The powers are described in the statute. The customs authorities may enter business premises and land belonging to those subject to the inspection during business hours, whether announced or unannounced, and inspect documents and data there; private homes are expressly excluded from this (§ 4 Abs. 1 SchwarzArbG). When inspecting individuals, they may obtain information about employment relationships and check identity details (§ 3 SchwarzArbG).
That marks the boundary. An inspection is not yet a search. If the matter turns into a criminal investigation, the rules of the Strafprozessordnung, the German Code of Criminal Procedure, apply, and then this applies too: you do not have to comment on the accusation and you may consult a defence lawyer at any time, including before the interview (§ 136 Abs. 1 Satz 2 StPO). Statements made on the premises "to clear things up" become part of the file later on.
Undeclared work: criminal penalty or regulatory fine?
§ 1 Abs. 2 SchwarzArbG describes when undeclared work exists: where someone provides or has performed services or work and in doing so breaches obligations under social security law to report, to pay contributions or to keep records, breaches tax obligations, breaches duties to notify as a recipient of social benefits, fails to register a trade, or fails to obtain entry in the Handwerksrolle.
§ 1 Abs. 4 SchwarzArbG takes four groups out of that: services by relatives within the meaning of § 15 of the Abgabenordnung or by life partners, services rendered as a favour, help between neighbours, and self-help within the meaning of the housing construction provisions named there. That exception is, however, subject to a condition that is easily read over: it applies only to services that are not sustainably directed at profit. Under the statute, an activity performed for low remuneration in particular counts as not being sustainably directed at profit. The words "help between neighbours" therefore do not carry the day on their own; someone who works regularly and for substantial remuneration for neighbours is not thereby outside the scope of the Act.
Part of these breaches stays within the law on regulatory offences. § 8 Abs. 5 SchwarzArbG names only maximum amounts for this and no minimum fine: depending on the breach, up to 1,000, 5,000, 30,000, 50,000 or 100,000 euros. Reporting breaches under the Social Code can also be punished under § 111 SGB IV (Sozialgesetzbuch Viertes Buch, Book Four of the German Social Code), there with a regulatory fine of up to 50,000 euros in the most serious of the cases listed (§ 111 Abs. 4 SGB IV).
The matter becomes a criminal offence as soon as one of the following allegations is on the table.
§ 266a StGB: the central allegation
An employer who withholds from the collecting agency the employee's contributions to social security, including those to employment promotion, is punished with imprisonment of up to five years or a fine (§ 266a Abs. 1 StGB). It is likewise an offence for an employer to give the body responsible for collection incorrect or incomplete information about facts relevant under social security law, or in breach of duty to leave that body in ignorance of such facts, and thereby withhold contributions (§ 266a Abs. 2 StGB).
Two points are often overlooked here. First, withholding is enough; loss in the sense of a fraud does not have to be proved separately. Second, § 266a Abs. 5 StGB extends the circle of those under the duty: the person commissioning a homeworker, a home-based trader or a person treated as equivalent to them, as well as the intermediate contractor, rank equally with an employer.
In particularly serious cases the statute provides for imprisonment of six months to ten years (§ 266a Abs. 4 StGB). As standard examples the provision names, among other things, acting out of gross self-interest on a large scale, the use of counterfeit or falsified records, and acting as a member of a gang.
Why does the contribution demand turn out so high?
Because it is not simply the unpaid contributions on the amount that was paid out. § 14 Abs. 2 Satz 2 SGB IV (Satz means sentence) provides: where taxes and contributions to social security and to employment promotion have not been paid in unlawful employment relationships, net remuneration is deemed to have been agreed. The money paid out is therefore treated as a net amount, and the gross remuneration extrapolated from it is used as the basis for calculating contributions. The employer owes the total social security contribution (§ 28e Abs. 1 SGB IV).
How high the demand will turn out in the end cannot be estimated from that. Which people, which period and which basis are to be applied is the real point of dispute, and that is where the order of magnitude is decided. Anyone who reads a figure in the letter inviting comment should not treat it as settled, but neither should they treat it as arbitrary.
What § 266a Abs. 6 StGB is and what it is not
In the criminal law on social security contributions there is no voluntary disclosure corresponding to the one in tax law. The terms are easily mixed up, and that leads people astray.
§ 266a Abs. 6 StGB provides as follows: in the cases of subsections 1 and 2, the court may refrain from imposing a penalty if the employer, at the latest by the time the contributions fall due or without delay thereafter, informs the collecting agency in writing of the amount of the withheld contributions and sets out why timely payment is not possible although the employer has made serious efforts to make it. Where those conditions are met and the contributions are then paid subsequently within the reasonable period determined by the collecting agency, the offender is not punished to that extent.
The point in time is therefore tied to the due date, the notification must go to the collecting agency in writing, and it must contain both elements: the amount and the explanation. After an inspection by the customs authorities, that point in time has as a rule long since passed. A payment made afterwards is therefore not the same thing as an effective declaration under § 266a Abs. 6 StGB, even though it may carry weight in the proceedings.
What else is on the table alongside § 266a StGB
Wage tax. A person who gives the tax authorities incorrect or incomplete information about facts relevant for tax purposes, or in breach of duty leaves them in ignorance of such facts, and thereby evades taxes, is punished with imprisonment of up to five years or a fine (§ 370 Abs. 1 AO); in particularly serious cases with imprisonment of six months to ten years (§ 370 Abs. 3 AO).
Fraud. Where a body is deceived and financial loss is thereby caused, § 263 StGB comes into consideration, with imprisonment of up to five years or a fine (§ 263 Abs. 1 StGB) and in particularly serious cases six months to ten years (§ 263 Abs. 3 StGB). This becomes relevant in practice, for instance, where incorrect information is given to benefit providers.
These allegations can stand side by side. Which one carries the day in the end is decided by the findings on the facts, not by the label used in the first letter.
What makes sense now
Secure the documents relating to the period in question and change nothing about them. Establish in what capacity you are being written to: as a party to the inspection, as a witness or as an accused person. And keep apart the two sets of proceedings that can run in parallel: the contribution proceedings with the collecting agency and the criminal or regulatory fine proceedings. A statement that looks sensible in one of them can have consequences in the other.
Frequently asked questions
Customs turned up at the business unannounced. Were they allowed to?
For an inspection, yes. The authorities of the customs administration may enter business premises and land during business hours, whether announced or unannounced; private homes are excluded (§ 4 Abs. 1 SchwarzArbG). If this turns into a criminal investigation, the rules of the Code of Criminal Procedure apply to searches and seizures.
I only failed to register one casual worker. Is that already a criminal offence?
That depends on whether contributions were withheld. § 266a Abs. 1 StGB attaches to that, not to the number of employees or the length of the employment. A reporting breach can also be punished as a regulatory offence (§ 8 SchwarzArbG, § 111 SGB IV).
If I pay everything back, is the matter then closed?
Not automatically. § 266a Abs. 6 StGB requires written notification to the collecting agency at the latest by the time the contributions fall due or without delay thereafter, stating the amount and setting out the reasons, and only then does timely subsequent payment take effect. A later payment does not replace that, although it can be taken into account in the proceedings.
Do I have to explain everything to the inspector?
Duties to give information and to tolerate the inspection under the inspection procedure, and your rights as an accused person in criminal proceedings, are two different things. As soon as there is an initial suspicion against you, § 136 Abs. 1 Satz 2 StPO applies: you do not have to comment on the matter and you may consult a defence lawyer beforehand. Establish your role before you explain anything.
This information is general in nature and does not replace advice on an individual case. It reflects the statutory texts as checked on 10 August 2026.
More on how we support companies and the people responsible for them in proceedings concerning contribution and levy offences can be found on our page on white collar crime.
If you would like to discuss your case, you can reach the office by telephone or by email.
ContactProvisions referred to
The provisions mentioned in this article, each with a link to the official German text.
- § 266a Abs. 1, 2, 4, 5 und 6 StGB (Vorenthalten und Veruntreuen von Arbeitsentgelt)checked on 10 August 2026
- § 263 Abs. 1 und 3 StGB (Betrug)checked on 10 August 2026
- § 370 Abs. 1 und 3 AO (Steuerhinterziehung)checked on 10 August 2026
- § 1 Abs. 1, 2 und 4 SchwarzArbG (Zweck des Gesetzes; Begriff der Schwarzarbeit mit Melde-, Beitrags- und Aufzeichnungspflichten; Ausnahmen für Angehörige und Lebenspartner, Gefälligkeit, Nachbarschaftshilfe und Selbsthilfe, jedoch nur soweit die Leistungen nicht nachhaltig auf Gewinn gerichtet sind)checked on 10 August 2026
- § 2 Abs. 1 SchwarzArbG (Prüfungsaufgaben der Zollverwaltung)checked on 10 August 2026
- § 3 SchwarzArbG (Befugnisse bei der Prüfung von Personen)checked on 10 August 2026
- § 4 Abs. 1 SchwarzArbG (Befugnisse bei der Prüfung von Unterlagen und Daten, Betreten von Geschäftsräumen mit Ausnahme von Wohnungen)checked on 10 August 2026
- § 8 Abs. 5 SchwarzArbG (Bußgeldrahmen; nur Höchstbeträge von 1.000 bis 100.000 Euro, keine Mindestbuße)checked on 10 August 2026
- § 14 Abs. 2 Satz 2 SGB IV (Nettoarbeitsentgelt bei illegalen Beschäftigungsverhältnissen)checked on 10 August 2026
- § 28e Abs. 1 SGB IV (Zahlungspflicht des Arbeitgebers)checked on 10 August 2026
- § 111 Abs. 4 SGB IV (Bußgeldrahmen)checked on 10 August 2026
- § 136 Abs. 1 Satz 2 StPO (Belehrung über Schweigerecht und Verteidigerkonsultation)checked on 10 August 2026