Tax Authority Confirms September 1st Deadline for IMI and IRS Payments
The Portuguese Tax and Customs Authority (AT) has confirmed that the payment deadline for the second installment of the Municipal Property Tax (IMI) and outstanding Personal Income Tax (IRS) payments is effectively extended to Monday, September 1, 2025. The official deadline falls on Sunday, August 31, prompting the automatic extension to the next business day as per standard procedure.
This announcement concerns property owners across Portugal whose annual IMI assessment exceeds €500, requiring them to make their second of three payments for the 2024 tax year. The IMI is a municipal tax levied on the registered value of real estate holdings and constitutes a primary source of revenue for local municipalities. The payment notices for this installment were issued by the AT in July, providing taxpayers with the necessary details for settlement.
The deadline extension to September 1st ensures that taxpayers have sufficient opportunity to complete their payments without incurring penalties for late settlement. Payments can be made through the official Portal das Finanças website, the Multibanco ATM network, or at local CTT (post office) branches. The same deadline applies to individuals who received a collection notice for outstanding IRS payments following their annual tax declaration earlier this year.
This payment obligation applies to all individuals and entities who were registered owners of property in Portugal as of December 31, 2024. This includes owners of residential homes, commercial spaces, land, and other types of real estate. The second installment is a critical component of the phased payment system designed to ease the financial burden on those with higher tax liabilities.
To ensure compliance, property owners should verify that they have received their payment notice and settle the amount due by the end of the day on September 1. The process is straightforward, with payment references (referência de pagamento) clearly indicated on the collection notice, which can be used for all available payment channels.
Failure to meet the deadline will result in the application of default interest ('juros de mora') on the outstanding amount, calculated on a daily basis. Furthermore, the AT is authorized to initiate enforcement proceedings and apply additional fines for non-compliance, which can add significant costs for the taxpayer.
Luís Reis, president of the National Association of Property Owners, commented on the announcement, stating, “We advise all property owners, especially those with larger portfolios, to confirm their payment status promptly. The extension to Monday is helpful, but it is always prudent to act before the final day to avoid any unforeseen issues with payment processing.”
A tax lawyer from a Lisbon-based firm further clarified the legal standing. “The extension of a tax deadline that falls on a weekend to the next working day is a standard and legally enshrined principle in the Portuguese tax code. It ensures fairness and accessibility for all taxpayers. The key is that the payment must be completed by the end of the day on Monday.”
The government considers the timely collection of IMI as essential for maintaining the financial health of municipalities, which rely on this income to fund local services ranging from sanitation and road maintenance to cultural and social programs. This routine collection is a fundamental part of Portugal's annual fiscal calendar.
This IMI installment is based on tax rates defined by each municipality for the year 2024. Property owners can consult the specific rates and their full tax assessment details on the Portal das Finanças.
For official information and to access payment details, taxpayers are encouraged to visit the Portal das Finanças or contact the AT directly through its official support channels.
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