What is the IBI Tax in Spain? - Definition: The 'Impuesto sobre Bienes Inmuebles' ('IBI', for short) is a local tax levied by the town hall where your property is located. It is paid once a year (normally due in August through to November) and applies to both resident and non-resident owners. In some parts of Spain it is known as SUMA. IBI Tax - Definition Valor catastral - Definition Why you...