ID cards on large construction sites

The Danish Parliament (Folketinget) has passed a law on ID cards on construction sites: Act no. 804 of 24 September 2026. It applies to building and civil engineering projects with a construction sum over DKK 100 million. The construction sum is the price of the whole project excluding VAT, including design, consultancy and financing during the construction phase (§ 1).

• 01Everyone who works on the construction site must wear an ID card (§ 3).
• 02Anyone who does not work on the site or is only there for a short time — e.g. delivering post or parcels — must wear a guest card and be entered in a guest book.
• 03Officials inspecting the site are exempt.
• 04You must show your card when the Danish Working Environment Authority (Arbejdstilsynet) asks for it.

The card is personal. It must show at least (§ 5):

• 01Name
• 02Photo
• 03Nationality
• 04CPR number (Danish personal ID number) or an equivalent unique identification
• 05Place of residence, if the employer provides housing
• 06Job function
• 07Statutory training under the working environment legislation, or equivalent qualifications recognised by the Danish Working Environment Authority (Arbejdstilsynet)
• 08The employer: name, CVR number and, if relevant, RUT number
• 09With temporary agency work: the company that has hired you in
• 10The date the card was issued

Statutory training means, for example, the courses you need to work with epoxy and isocyanates or with asbestos.

Everyone with an ID card must register how long they are on the construction site (§ 6). The client (developer) must make sure this happens and that the registrations are sent to the Danish Working Environment Authority (Arbejdstilsynet). The information is kept for 5 years after you have left the site (§ 7).

It is the client (developer) — the one who pays for the construction — who must ensure that everyone gets an ID card and that the information is kept up to date (§ 4). The client can be fined if this does not happen (§ 15).

The tax authorities and the Danish Agency for International Recruitment and Integration can also access the information for their inspections (§ 8).