HomeArrange and applyWater board taxesWater board tax assessmentWater board tax assessment Types of water board taxWe distinguish between four types of water board tax. Who receives a tax assessment and when?Users will receive a tax assessment at the end of January, owners at the end of April. RatesHow much tax you have to pay depends, among other things, on whether you are a tenant or a homeowner. Water board tax regulationsHere are the regulations we apply to water board taxes. Message box from My GovernmentWould you like to receive your tax assessment digitally only? Then sign up for the Message Box. Commercial premisesMessage box for businesses Did you know that, starting in 2026, the Message Box for businesses will become the primary communication channel between the water board and entrepreneurs in the region? Water board tax for commercial premisesYou pay a purification or pollution tax if you discharge wastewater from a commercial space. Digital declaration for commercial space usersCompanies with a water consumption of more than 217 m³ may receive a request to submit a declaration. Source identification, remediation, measurement companiesIf you discharge or dispose of wastewater from a site, you will receive a tax assessment for commercial premises. Or are you looking forIndividual Wastewater Treatment (IBA)An IBA is a system that purifies wastewater and then discharges it into surface water. Payment in instalments via direct debitWould you like to pay the assessment in instalments? This can be done by authorising a direct debit.
