Taxpayers covered by the Additional Municipal Property Tax (AIMI) have until September 30th to proceed with payment of this tax. The deadline is part of the fiscal calendar published by the Tax and Customs Authority, which proceeds with the tax assessment in June, based on the patrimonial tax values of the properties and the situation existing on January 1st of the respective year.
The AIMI applies to the sum of the Tax Patrimonial Value of residential urban properties and construction land located in Portugal. Excluded are properties classified as commercial, industrial or intended for services, as well as those covered by the Rental Support Program. Taxable persons can be natural and legal persons who are owners, usufructuaries or superficiaries of these properties.
In the case of natural persons, a deduction of 600 thousand euros is applied, and taxation only begins when the relevant heritage exceeds this amount. Married couples or de facto partners can opt for joint taxation, doubling the deduction to 1.2 million euros. Rates for natural persons start at 0.7%, rising to 1% on the portion between one and two million euros and to 1.5% on values exceeding two million.
Payment must be made in a single installment during the month of September through the Tax Portal, and failure to pay within the deadline implies the charging of late payment interest.
