Rolling WWS Maximum in Rotterdam: Cumulative Effects Over Multiple Years

In Rotterdam, the WWS maximum does not apply in isolation per year, but rolls over cumulatively across multiple years, as laid down in Article 7:901 of the Dutch Civil Code (BW). Landlords in neighbourhoods such as Delfshaven or Kralingen may not skip the maximum in one year to double-charge later in the vibrant port city. The total increase over years may never exceed the compound maximum. Example: an increase of 2% in 2023 and 3.4% in 2024 amounts to approximately 5.5% cumulatively. Does a new increase exceed this in Rotterdam tenancy agreements? Challenge it with the Huurcommissie! RVO uses the rent index formula for calculations, while the Huurcommissie tool is essential for the unregulated sector in Rotterdam-South. For housing associations such as Woonbron or Vestia, the DAB limit applies strictly. Rotterdam tenants often see 'catch-up' increases after housing shortage pressure; these are invalid without judicial review via the Rotterdam district court. Demand detailed transparency in rent notices. In case of exceedance: demand retroactive reduction, compensation for damages and possibly rent point compensation via local regulations. Keep a digital rent history with tools such as the Rotterdam Huurcheck app and compare annually with neighbours in Feijenoord. This protects against creeping price inflation in the overheated Rotterdam market and safeguards the rights of long-term tenants in the city on the Maas.