Portugal’s Tax and Customs Authority has issued Order No. 79/2025 – XXIV  on 8 May 2025, extending key tax deadlines due to the recent large-scale power outage affecting Portugal, France, and Spain.

The filing deadline for the 2024 annual Corporate Income Tax (CIT) return has been postponed from 31 May 2025 to 16 June 2025.

The payment deadline for the first instalment—or the full amount, if not paid in installments—of the annual property tax has been deferred from 31 May 2025 to 30 June 2025.

This announcement was made on 12 May 2025.

Earlier, the Portuguese government extended several VAT compliance deadlines under Order No. 78/2025 – XXIV on 6 May 2025, due to recent tax portal access issues caused by power outages in some EU countries and other network disruptions.