A ruling by the Constitutional Court (Tribunal Constitucional) threatens to suspend the collection of municipal property tax (Imposto Municipal sobre Imóveis or IMI) from wind farms and dams across 135 inland municipalities. The court's third section found that the legal method used to assess the taxable value of renewable energy installations violates the constitution. The ruling stems from a dispute between energy operator Finerge and the municipality of Amarante, creating significant revenue uncertainty for local councils.
Court Ruling Jeopardizes Wind and Dam Taxes in Municipalities
Tuesday, 27 October 2026AI summary
Context & Explainers
The municipal property tax (Imposto Municipal sobre Imóveis), known as IMI, is an annual tax on property ownership calculated from the property’s taxable value, with the exact rate set by each municipality. For expats who own property, IMI is a recurring local cost that can vary by location and is often central to policy discussions about housing affordability.
The Constitutional Court (Tribunal Constitucional) is Portugal's highest court for constitutional review. Its primary role is to assess whether laws, decrees, and government actions comply with the Portuguese Constitution, and it has the power to strike down or suspend unconstitutional measures.
The court consists of 13 judges — 10 appointed by the Assembly of the Republic and 3 co-opted by the other judges. It also oversees the legality of political parties and their finances, verifies election results, and rules on the constitutionality of referendums.
The Constitutional Court is frequently in the news when opposition parties, the President, or the Ombudsman refer controversial legislation for review — such as labor reforms, housing laws, or immigration policy changes. Its rulings are final and binding.
