Workplace Accident in Denmark: Who Is Liable in 2026
A workplace accident on a Danish construction site is one of the most stressful situations a posted worker can face. Beyond the physical injury, there is an immediate tangle of legal obligations, insurance claims, and cross-border reporting that must be handled correctly, often within tight deadlines. Understanding who is liable and what must be reported is not just useful knowledge; in many cases it is the difference between receiving full compensation and losing it entirely.
Step 1: Establish Who Is the Employer of Record
Before anything else, a posted worker must be clear about one fundamental question: who is the legal employer? In the construction sector, the answer is rarely simple. A Polish agency may have placed the worker with a Danish subcontractor, who in turn works for a main contractor on a large site. Each layer of that chain carries different obligations under both Danish and Polish law.
Under EU Directive 96/71/EC on the posting of workers, as amended by Directive 2018/957, the posting employer, typically the Polish agency or company, remains responsible for the worker's social insurance contributions during the posting period. This means that ZUS (Zakład Ubezpieczeń Społecznych) in Poland generally remains the competent institution for accident insurance, provided the worker holds a valid A1 certificate confirming they are covered by Polish social security. Without that certificate, liability can shift in unexpected directions. Before travelling, it is worth reviewing the obligations laid out in a properly drafted contract, as explained in our guide on Temporary Work Contracts in Denmark: Key Clauses for Polish Construction Workers 2026.
Step 2: Gather the Required Documents Immediately
Time is critical after an accident. Danish law requires that workplace accidents resulting in absence of at least one full working day beyond the day of the accident must be reported to Arbejdstilsynet (the Danish Working Environment Authority) and to the employer's Danish workers' compensation insurer. The Danish Act on Workers' Compensation (Arbejdsskadesikringsloven) obliges employers operating in Denmark to hold a workers' compensation insurance policy, and this obligation applies to foreign companies posting workers to Danish sites as well.
The documents a worker should collect as soon as possible include a written accident report signed by the site supervisor, medical records from the treating facility (including the emergency room report if applicable), witness statements from colleagues, photographs of the accident scene, and a copy of the A1 certificate. If the site had visible safety deficiencies, documentation of those conditions strengthens any future claim. Our overview of Mandatory Safety Signs on Danish Construction Sites 2026 outlines what legally required warnings and markings should have been in place.
Step 3: Report the Accident Through the Correct Channels
There are two parallel reporting obligations that must both be fulfilled, and confusing them is one of the most common mistakes posted workers and their employers make.
On the Danish side, the employer must notify Arbejdstilsynet of serious accidents without delay, in practice, immediately or within very short notice for accidents involving hospitalisation or serious injury. The report is submitted via the official Danish portal at at.dk. The employer's Danish workers' compensation insurer must also be notified so that a compensation claim can be opened. If the posting company does not have a Danish insurance policy, the Danish Labour Market Insurance (Arbejdsmarkedets Erhvervssikring) acts as a safety net, but the posting employer may face significant liability for failing to arrange coverage.
On the Polish side, the employer is obliged under the Polish Labour Code (Kodeks Pracy) to establish an accident investigation team and produce a post-accident protocol (protokół powypadkowy) within fourteen days of the accident. This document is essential for any ZUS accident benefit claim. The worker or their representative should verify that this protocol accurately reflects the circumstances of the accident, as errors or omissions can delay or reduce benefits. Full guidance on ZUS procedures is available at zus.pl.
Step 4: Submit Claims to the Right Institutions
Once documentation is in order, claims must be submitted formally. For ZUS accident benefits, which can cover temporary incapacity, rehabilitation, and in serious cases a permanent disability pension, the worker submits the completed post-accident protocol together with medical certification to their local ZUS branch in Poland. The posting employer handles this submission on the worker's behalf in most cases, but the worker has the right to monitor the process and to contact the State Labour Inspectorate (PIP, Państwowa Inspekcja Pracy) if the employer is uncooperative. PIP's contact details and complaint procedures are accessible at pip.gov.pl.
On the Danish side, if the accident was caused by a violation of Danish workplace safety regulations, the worker or their representative can also file a complaint with Arbejdstilsynet. That authority has the power to issue improvement notices, prohibition orders, and, in serious cases, to refer matters to the police for prosecution.
Step 5: Wait for the Result and Monitor Progress
Processing times vary. ZUS accident benefit decisions can take several weeks, particularly if the post-accident protocol is disputed. Danish workers' compensation decisions can take considerably longer when the degree of permanent injury must be assessed by medical specialists. During this period the worker should keep copies of all correspondence, attend all medical appointments arranged by the insurer, and avoid signing any settlement documents without independent legal advice.
Consider a hypothetical scenario: a Polish carpenter posted to a Danish site suffers a hand injury after a guard on a power tool is missing. If his employer holds a valid Danish workers' compensation policy and the A1 certificate is in order, he can receive both Danish compensation for the Danish-law elements of the claim and Polish ZUS accident benefits for the Polish social security elements. If either document is missing, months of additional correspondence and potential gaps in coverage follow. This kind of situation is also why agencies sending workers abroad must be properly registered and compliant, as described in our article on How to Register a Temporary Work Agency Sending Workers to Denmark 2026.
Common Mistakes to Avoid
The single most damaging mistake is delay. Both Danish and Polish systems impose strict deadlines, and missing them can forfeit rights entirely. A close second is failing to obtain or verify the A1 certificate before the posting begins, without it, the question of which country's social security system covers the worker becomes genuinely contested. Workers should also never rely solely on verbal assurances from a site supervisor that "everything will be sorted out." Every step of the process must be documented in writing.
Finally, language barriers should not be underestimated. Danish accident report forms and insurance correspondence are in Danish, and errors caused by misunderstanding can create serious problems. If the employer does not provide translation assistance, the worker has the right to seek help from PIP or from a trade union representative operating in Denmark.
Actionable Advice
Before starting any assignment on a Danish construction site, confirm that your A1 certificate has been issued by ZUS and that your employer holds a valid Danish workers' compensation insurance policy. The moment an accident occurs, document everything, photographs, witnesses, medical records, and ensure the site supervisor signs a written accident report on the same day. Contact PIP if your employer delays the post-accident protocol. Submit your ZUS claim as soon as the protocol is available and keep copies of every document you send or receive. These steps do not guarantee a smooth process, but they give you the strongest possible foundation for a full and fair outcome.