Undeclared Work in Germany 2026: Fines, Liability and How to Report It
Up to €50,000 for clients, €500,000 for contractors – plus deportation risk for non-EU residents. Here is what the 2026 customs reform really changes.
Undeclared work (Schwarzarbeit) in Germany is a regulatory offence – and in serious cases a criminal one – under the Schwarzarbeitsbekämpfungsgesetz (SchwarzArbG). Private clients risk fines up to €50,000, contractors up to €500,000 and prison. Contracts are void under § 134 of the Civil Code (BGB), so there is no warranty. Since the reform of 27 April 2026, the Customs Financial Control Unit (FKS) has more powers and many more inspectors.
Key Takeaways
- •Clients risk up to €50,000 in fines (§ 8 (1) SchwarzArbG); contractors up to €500,000 in serious cases (§ 8 (4)).
- •The contract is void under § 134 BGB – no warranty, no damages, no payment claim (BGH VII ZR 6/13).
- •Non-EU residents face residence-permit revocation and possible deportation under § 95 AufenthG.
- •Employees stay covered by statutory accident insurance (§ 2 SGB VII) even if their employer pays them off the books; self-employed undeclared workers are not.
- •You can report undeclared work anonymously via the FKS portal on zoll.de.
Four core risks
Limited insurance cover
You can be personally liable for accidents on your property
No warranty
Contract is void under § 134 BGB – BGH VII ZR 6/13
Up to €50,000 fine
§ 8 (1) SchwarzArbG – applies to private clients too
Criminal proceedings
Tax evasion under § 370 AO; deportation risk for non-EU workers
Typical fines in practice
| Case | Possible fine |
|---|---|
| Painting without invoice | €5,000 – €15,000 |
| Bathroom renovation paid in cash | €10,000 – €30,000 |
| Roof or plumbing work without master certificate | €15,000 – €50,000 |
| Repeated commercial undeclared work | Criminal proceedings + up to €500,000 |
Ranges follow customs penalty catalogues. Actual amounts depend on federal state, damage size and repeat offences. Statutory maximum under § 8 (4) SchwarzArbG: €500,000.
Consequences in detail
For clients (you)
- Up to €50,000 fine for commissioning (§ 8 (1) SchwarzArbG)
- Civil liability for accidents on your property
- No warranty, no damages (BGH VII ZR 6/13)
- No tax deduction under § 35a EStG without invoice
For contractors
- Up to €500,000 fine in serious cases (§ 8 (4))
- Back payment of income tax and social contributions
- Possible occupational ban (§ 9 SchwarzArbG / § 70 StGB)
- Imprisonment for tax evasion (§ 370 AO)
How to commission work legally – and still save money
Demand a proper invoice
Always insist on an invoice with VAT (Umsatzsteuer) shown. Only then do you have warranty rights and can deduct labour costs from your tax.
Check the Chamber of Crafts register
Licensed trades (Anlage A of the Handwerksordnung) – electrical, plumbing, heating, roofing – require a master craftsman certificate (Meisterbrief). You can check entries free of charge on the local Handwerkskammer (HWK) website.
Use the § 35a EStG tax deduction
With an invoice and bank transfer payment, you can deduct 20% of labour costs – up to €1,200 per year – directly from your tax bill. Legal craftsmanship often beats the cash discount.
Get three written quotes
Compare at least three written quotes with itemised materials. A contractor who only takes cash and refuses to write an invoice is usually not the cheapest – just the riskiest.
How to report undeclared work to German Customs
The Financial Control of Undeclared Work (Finanzkontrolle Schwarzarbeit – FKS) is part of German Customs. You can submit tips anonymously. Concrete details raise the chance of an actual inspection.
Use the official customs portal on zoll.de (English available).
Central customs information: 0228 303-26000 (Mon–Fri 8 a.m. to 5 p.m. CET). You will be forwarded to the responsible Hauptzollamt.
Anonymous letter to the local Hauptzollamt (main customs office) with address, dates and observed activity. Your name is not required.
Honest reports carry no personal risk. False accusations, however, can be punishable under § 164 of the Criminal Code – only report what you have actually observed.
Reform 2026: customs is checking far more
The Schwarzarbeitsbekämpfungsgesetz of 27 April 2026 (BGBl. 2026 I no. 119) widens FKS investigative powers and adds new reporting duties for banks. Customs added about 960 new permanent positions in 2026; more than 9,000 staff now work on undeclared-work enforcement. Inspections target weekend work, private construction sites and suspicious cash flows.
Original sources and laws
We link directly to the German statutes and authority pages so you can verify everything yourself and cite it in your own correspondence.
- SchwarzArbG § 8 (Penalties)— gesetze-im-internet.de
- BGB § 134 (Void contracts)— gesetze-im-internet.de
- EStG § 35a (Craftsmen tax deduction)— gesetze-im-internet.de
- DGUV: accident cover for undeclared workers— dguv.de
- German Customs – Undeclared work— zoll.de
Frequently asked questions on undeclared work in Germany
What counts as undeclared work in Germany?
Undeclared work (German: Schwarzarbeit) is any service or trade performed without paying taxes or social contributions, or without the required business registration, master craftsman certificate (Meisterbrief) or trade licence. The legal definition is in § 1 (2) SchwarzArbG. Casual help between family members or genuine neighbour favours without profit motive do not qualify.
What are the penalties for undeclared work in 2026?
Private clients face fines up to €50,000 under § 8 (1) SchwarzArbG. Contractors face up to €500,000 in serious cases involving fraud or commercial intent under § 8 (4), plus back payment of taxes and social contributions, criminal prosecution under § 9 SchwarzArbG and § 370 of the German Fiscal Code (Abgabenordnung), and possible imprisonment for tax evasion.
Do I have any warranty if I hire someone off the books?
No. The German Federal Court of Justice ruled in case BGH VII ZR 6/13 (10 April 2014) that contracts with an undeclared-work clause are void under § 134 of the Civil Code (BGB) read with § 1 (2) SchwarzArbG. You cannot claim repairs, price reduction or damages – and the worker cannot demand payment.
Does German accident insurance cover undeclared workers?
It depends on status. Employees (Arbeitnehmer) remain covered by statutory accident insurance under § 2 (1) no. 1 SGB VII even when their employer pays them off the books – the German DGUV explicitly protects vulnerable workers. Self-employed undeclared workers without voluntary coverage are not protected. As a client, you may be personally liable for accident costs on your property.
Can a non-EU resident be deported for undeclared work?
Yes. Foreign nationals working without the right residence and work permit can face fines, criminal proceedings under § 95 of the Residence Act (AufenthG) and revocation of their residence permit. Repeated or serious cases can trigger expulsion (Ausweisung). Blue Card holders risk losing their permit if undeclared work conflicts with their visa conditions. Always check your Aufenthaltstitel before taking informal jobs.
How can I report undeclared work to German customs?
The Financial Control of Undeclared Work (FKS), a unit of German Customs, accepts tips online via the official portal on zoll.de, by phone via the central customs information line (0228 303-26000) and by anonymous letter to the nearest Hauptzollamt (main customs office). Concrete details – address, dates, observed activity – significantly increase the chance of an inspection.
How do I spot undeclared work?
Warning signs: cash-only payment, no invoice with VAT shown, prices far below market level, no business registration (Gewerbeanmeldung), no entry in the Chamber of Crafts register for licensed trades (Anlage A HwO), and no master craftsman certificate for electrical, plumbing, heating or roofing work.
What changes in Germany in 2026 around undeclared work?
The new Schwarzarbeitsbekämpfungsgesetz of 27 April 2026 (BGBl. 2026 I no. 119) widens FKS investigative powers and introduces new reporting duties for banks. Customs added around 960 new permanent positions in 2026; more than 9,000 staff now work on undeclared-work enforcement. Inspections of private construction sites and weekend work are increasing.
Protect yourself the legal way
Who pays if something happens on your property? Which insurance actually covers craftwork accidents? Compare options or check all 2026 changes for residents in Germany.
Related: Home insurance · Legal protection · Blue Card finance guide · Tax return 2026