The Regional Tax Group levies and collects taxes for the Schieland & Krimpenerwaard and Delfland District Water Control Boards. Additionally, the RBG completes these tasks and the implementation of the WOZ Act (Valuation of Immovable Property Act) for the municipal authorities of Delft, Schiedam and Vlaardingen.
The Regional Tax Group has the form of a community scheme. This means it is an independent government body with its own management board. The Executive Committee members of the water boards and the municipal authorities together form the management board and the Executive Committee.