THE BOTTOM LINE
- Cross-Border Pensions Trigger Reporting: Dutch nationals who receive a Dutch pension while living in another EU country remain subject to Dutch income reporting for social security purposes, even if they never worked abroad. The physical move across a border is the key trigger.
- Data Sharing is Standard Procedure: Tax authorities have a clear legal mandate to determine an individual’s worldwide income and share this information with social security bodies, like the CAK, to calculate mandatory healthcare contributions. Privacy-based challenges are unlikely to succeed.
- Established Law, No Surprises: This ruling reinforces a long line of settled case law. For businesses managing cross-border retirement plans and for executives planning their own futures, it provides legal certainty: EU social security coordination rules are interpreted broadly.
THE DETAILS
The case involved a Dutch national who lived in Belgium for the first half of 2020 before moving back to the Netherlands. During this time, he received both a Dutch state pension (AOW) and a private pension. The Dutch Tax Inspector issued a decision establishing his “non-Dutch taxable income” (a NiNbi-beschikking). This is not a tax assessment in itself, but a formal determination of worldwide income used by other government bodies—in this case, to calculate the individual’s mandatory healthcare insurance contributions for the period he lived abroad. The pensioner argued the Inspector had no right to issue this decision, as he was not a “migrant worker” and had only ever worked in the Netherlands.
The Hague Court of Appeal swiftly rejected this argument, confirming the lower court’s decision. The court leaned on extensive and consistent case law from the Dutch Supreme Court and the Court of Justice of the European Union. Under EU Regulations on social security coordination (specifically Regulation 883/2004 and its predecessor), the rules apply not just to those who work in multiple member states, but also to those who, after their working life in one state, move to another while drawing a pension. The simple act of residing in Belgium while receiving a pension from the Netherlands was sufficient to bring the individual under the scope of these EU rules, empowering the Dutch authorities to make the income determination.
The court also dismissed the pensioner’s secondary claims. He argued that sharing his income data with the CAK (the body that manages healthcare contributions) was a breach of his privacy rights. The court found this unpersuasive, pointing to a clear legal basis in the Dutch Health Insurance Act that authorizes this data sharing for the purpose of executing the law. A final argument that the decision violated his property rights under the European Convention on Human Rights also failed; the court clarified that the income determination itself is not an interference with property. The ruling serves as a stark reminder that tax and social security frameworks within the EU are deeply integrated, and obligations often extend beyond a nation’s borders.
SOURCE
Source: The Hague Court of Appeal
