Supreme Court obliges PSC to pay IBI on its Barcelona headquarters and closes the door to an exemption

PSC will have to pay IBI on its headquarters on Pallars Street. The Supreme Court rejects the exemption claimed by the party. The decision affects municipal taxes from 2020 onwards. The ruling sets a precedent for other political parties. Ayuntamiento de Barcelona maintains its tax criterion.

PSC faces an unexpected change in the management of its finances following the Tribunal Supremo’s decision. The party will have to pay the Impuesto de Bienes Inmuebles (IBI) for its headquarters on Pallars Street, in the Sant Martí district. This ruling directly affects the party’s resources and could influence the planning of other parties with headquarters in the city.

The dispute began in 2021, when Ayuntamiento de Barcelona, then under Ada Colau’s administration, required PSC to pay IBI. The party, led by Salvador Illa, argued that, because of its non-profit character, it should be exempt from the tax. However, the municipal authority maintained its position and took the case to court after an initial ruling in PSC’s favour.

Tribunal Supremo has settled the debate: political parties are not expressly exempt from IBI under current regulations. The ruling notes that the legislature had the opportunity to include that exemption in the Ley Financiación Partidos, as is the case for other non-profit entities, but did not do so. PSC must therefore settle the tax corresponding to the 2020 financial year and subsequent years.

This judgment closes the judicial path of the case and establishes a relevant precedent for the taxation of party headquarters in Barcelona. Ayuntamiento, now under Jaume Collboni’s leadership, maintains its criterion and reinforces the application of local rules on municipal taxes.

Impuesto de Bienes Inmuebles (IBI) is one of Spanish municipalities’ main tax revenues. In Barcelona, its collection funds essential public services and the maintenance of urban infrastructure. Applying IBI to political party headquarters had generated debate about the tax treatment of non-profit entities. Tribunal Supremo’s decision clarifies the legal framework and could influence future exemption claims by other political organisations in the city.

Sentencia TS 23 March 2026: PSC pays IBI for its Pallars Street headquarters (Sant Martí) from 2020 (without legal costs). Tribunal Supremo overturns the September 2023 ruling by Juzgado Contencioso-Administrativo 16 Barcelona in PSC’s favour, and upholds Ayuntamiento Barcelona’s October 2024 cassation appeal. Reason: Ley Financiación Partidos 2007 refers to general tax rules; there is no express IBI exemption for parties (unlike IRPF/VAT/IS/companies), and they are not analogous to non-profit entities (Ley 49/2002). Precedent: affects other political parties in Barcelona.