Overtime Night & Holiday Pay on Danish Construction Sites 2026

Understanding how to correctly calculate overtime night and holiday pay on Danish construction sites is one of the most practical skills a Polish worker or agency manager can have in 2026. Errors in this area are among the most common wage disputes in the Danish building sector, and they can be costly for both workers who are underpaid and employers who face claims under Danish collective agreements. This guide walks you through every step, from checking whether a supplement applies to submitting a correction to your employer or agency.

Step 1: Check Whether You Are Eligible for an Overtime Supplement

Before reaching for a calculator, you need to confirm that your work actually qualifies for an enhanced rate. In Denmark, wage supplements for night work and work on public holidays are not set by a single national statute the way a minimum wage might be. Instead, they flow from collective agreements, known as overenskomster, negotiated between trade unions and employer organisations. The most relevant agreement for construction workers is the one between Dansk Byggeri and Fagligt Fælles Forbund (3F). If your employer or agency is bound by this agreement, or a similar one, the supplement rules apply to you directly.

Work performed outside standard daytime hours, typically evenings, nights, and weekends, attracts a percentage supplement on top of your base hourly rate. Work on Danish public holidays (helligdage) is treated even more generously. The exact percentages are defined in the applicable overenskomst and can be updated during each bargaining round, so always verify the current version with your union representative or on the Dansk Byggeri website. For a broader overview of what base rates look like, see our guide on Minimum Hourly Rates for Construction Workers in Denmark 2026.

Step 2: Gather the Required Documents

Accurate calculation depends entirely on accurate records. Before you can dispute a payslip or prepare a claim, you need to collect the following:

• Your signed employment contract or the agency assignment letter, which should reference the applicable overenskomst
• Time sheets (timesedler) for the relevant pay periods, ideally signed by a site supervisor
• All payslips (lønsedler) for the period in question
• A copy of the relevant collective agreement or at least the wage and supplement annex
• Your RUT registration number if you are posted from Poland, since this links your work record to Danish authorities

If you are a posted worker, your agency should already hold a valid RUT registration. Problems with that registration can complicate wage claims significantly. For a detailed look at what can go wrong, the RUT Registration Mistakes in Denmark: 2026 Agency Guide is essential reading before you proceed.

Step 3: Perform the Calculation

Once you have your documents, the arithmetic itself is straightforward. The general formula is:

Supplement payment = (Base hourly rate x Supplement percentage) x Number of qualifying hours

To make this concrete, consider a hypothetical example. Suppose a construction worker has a base hourly rate of 200 DKK. If the applicable overenskomst grants a supplement of 50 percent for work on a public holiday, each such hour should be paid at 300 DKK. If that worker logged eight hours on a public holiday and received only the base rate, the shortfall per day would be 800 DKK. Over several months, such underpayments accumulate quickly.

For night work, the supplement percentage is typically lower than for public holidays but still significant. Again, the exact figure must come from your specific agreement. Do not rely on informal estimates from colleagues; the only authoritative source is the text of the overenskomst itself or a confirmed communication from 3F or Dansk Byggeri.

A Note on Overtime Hours Versus Supplement Hours

It is important to distinguish between overtime (extra hours beyond the agreed weekly total) and unsocial hours supplements (extra pay for when those hours fall). A worker can be owed both simultaneously. For example, working a tenth hour on a public holiday might attract both an overtime rate and a holiday supplement, depending on how the agreement is worded. Reading the relevant clauses carefully, or asking a union representative to do so, avoids leaving money on the table.

Step 4: Submit Your Claim or Correction Request

If your payslips do not reflect the correct amounts, the first step is always to raise the issue directly and in writing with your employer or agency. Keep a copy of every communication. Danish employment law, overseen in part by Arbejdstilsynet (the Danish Working Environment Authority), requires that wage records be transparent and accessible. You can find guidance on worker rights at the official Danish Ministry of Employment portal at bm.dk.

If the employer does not respond or disputes your calculation, you can contact your trade union (3F for most construction workers) or file a complaint with the relevant industrial arbitration body. Posted workers from Poland should also be aware that the Polish Labour Inspectorate (PIP) has a mandate to assist workers with cross-border wage disputes. Information is available at pip.gov.pl.

For workers on rotating assignments, the structure of your contract may affect which pay period a claim falls into. The rules around worker rotation and how they interact with Danish posted-worker legislation are covered in our guide on Worker Rotation on Danish Construction Sites and LOV 89: 2026 Guide.

Step 5: Wait for the Result and Follow Up

After submitting a written claim, Danish practice generally allows the employer a reasonable period to respond. If the matter goes to a union or arbitration body, timelines vary. Keep all correspondence dated and stored securely. If a correction payment is made, verify that it appears correctly on your next payslip and that any associated tax withholding through SKAT (the Danish Tax Authority) is handled properly. Guidance on Danish tax obligations for foreign workers is available at skat.dk.

Common Mistakes to Avoid

The single most frequent error workers make is accepting verbal assurances that supplements will be "sorted out later." Always get the acknowledgement in writing. The second most common mistake is conflating the supplement percentage with the total hourly rate: the supplement is applied to the base rate, not to a rate that already includes previous supplements. Third, workers sometimes submit claims without attaching their time sheets, which makes verification impossible and delays resolution significantly.

Agencies managing teams of posted workers should audit payroll against the applicable overenskomst at least quarterly. A single misconfigured payroll template can generate systematic underpayments across an entire workforce, creating liability that compounds over time. Proactive internal checks are far less expensive than retroactive claims or regulatory scrutiny from Arbejdstilsynet.

The most actionable step you can take today is to locate the current version of your collective agreement, identify the supplement clauses for night and holiday work, and compare them line by line against your last three payslips. If the numbers do not match, document the gap and contact your union representative or PIP without delay.