Worker Rotation on Danish Construction Sites & LOV 89: 2026 Guide

Worker rotation on Danish construction sites is one of the most practically demanding aspects of LOV 89 compliance for Polish staffing agencies and subcontractors operating in Denmark. Every time a crew changes, whether a single worker is swapped out or an entire team is replaced, there are specific obligations around attendance records, RUT registration, and notification to Danish authorities that must be met without delay. Getting this right is not optional. Arbejdstilsynet, Denmark's Working Environment Authority, carries out inspections on active construction sites, and gaps in documentation discovered during a crew rotation are among the most common compliance failures found.

What LOV 89 Actually Requires

LOV 89, formally the Danish Act on the Posting of Workers, sets out the framework under which foreign employers send workers to Denmark on a temporary basis. The law requires that any foreign company posting workers to Denmark registers with the RUT register (Register of Foreign Service Providers) before work begins. Crucially, this obligation is not a one-time formality. Each time the composition of a posted workforce changes in a material way, the registration must be updated to reflect the current reality on the ground.

For construction sites in particular, this creates a rolling administrative responsibility. A project may run for months, with workers rotating every few weeks as phases of work change. Each rotation triggers a fresh review of whether the RUT entry is accurate, whether new workers have been correctly notified to the system, and whether the attendance records held on site match what has been declared. The Arbejdstilsynet website provides guidance on what documentation inspectors expect to find during an unannounced site visit.

Step 1: Confirm Eligibility and Posting Status Before Each Rotation

Before any new worker joins a site as part of a rotation, the employing agency or subcontractor must confirm that the worker qualifies as a posted worker under EU Directive 96/71/EC on the posting of workers. This means the worker must be employed by the foreign company, not hired out as a temporary agency worker under different rules, and the posting must be genuinely temporary.

It is also worth checking the worker's social security status. Polish workers posted to Denmark typically remain covered by Polish ZUS contributions during their posting, provided an A1 certificate has been issued by ZUS confirming continued coverage under Polish social security law. Without a valid A1, Danish social contribution obligations may apply. You can verify the A1 application process through ZUS's official portal.

Step 2: Gather the Required Documents for the Incoming Crew

For each worker entering the rotation, the following documentation should be assembled before the first day on site: a valid A1 certificate, a copy of the employment contract (or relevant extract confirming the posting terms), proof of the worker's professional qualifications where the trade requires it, and confirmation that the worker has received information about Danish working conditions as required under LOV 89. This last point is often overlooked during fast rotations, Danish law requires that posted workers are informed in writing about local pay, working hours, and leave entitlements.

Agencies managing multiple simultaneous rotations across several sites frequently struggle with this document-gathering step when relying on shared spreadsheets or messaging apps. As covered in our guide on how to switch from Messenger and Excel to agency software in 2026, centralising documentation in a dedicated platform significantly reduces the risk of sending a worker to site before their paperwork is complete.