IMI Property Tax: November Instalment Due on Bills Above €100

Property owners in Portugal whose annual IMI bill is above €100 have a payment due in November, unless they already paid the full amount earlier in the year, The Portugal News reports. The bill is based on who owned the property on December 31, 2025, so people who have sold since then can still owe it.

Separately, consumer group DECO PROteste says some owners pay more than they need to because the official value of their home has never been reassessed. A reassessment request filed by December 31 can change the bill for 2027.

What is IMI and who collects it?

IMI (Imposto Municipal sobre Imóveis, Portugal’s municipal property tax) is collected by AT (Autoridade Tributária, the Portuguese Tax Authority). It covers homes, commercial buildings and land. Foreign residents and owners living abroad generally have the same obligations as anyone else, wherever they are tax resident.

For urban properties the standard rate usually falls between 0.3% and 0.45%. Each municipality picks its own rate inside the legal limits, and exceptional rates exist in some cases, so two similar homes in different municipalities can get different bills.

Which owners pay in November?

The number of instalments depends on the size of the annual bill:

• €100 or less: one payment, normally in May.
• More than €100 and up to €500: two payments, in May and November.
• More than €500: three payments, in May, August and November.

Owners can also pay the whole year in one go in May. Anyone who did that has nothing to pay now.

How do you check and pay the bill?

Notices are on the Portal das Finanças, the government’s online tax service. After logging in with a NIF (Portuguese tax identification number) and password, owners open the IMI section and choose Consultar Notas de Cobrança to see their notices. Payment references also appear under A Minha Área and Pagamentos a decorrer.

Payment can be made by Multibanco, online banking or other authorised services. The Tax Authority says people who did not receive a notice can look it up in their online account or ask a local tax office for a copy. A late payment can bring interest and, in some cases, fines or enforcement proceedings.

What does this mean for people who may be overpaying?

IMI is calculated from the VPT (Valor Patrimonial Tributário, the official taxable value), which takes into account size, location, age and other features. The VPT is often different from what the property would sell for on the market.

The Tax Authority does not update every part of that calculation automatically. One example is the age coefficient (coeficiente de vetustez). It can change as a building gets older and may lower the taxable value. DECO PROteste encourages owners to check whether a reassessment would help them before filing a formal request, and its online tax service has guidance on how to review the figures.

A reassessment can go either way. Depending on the property and the valuation factors, the taxable value and the bill may rise.

How does a reassessment request work?

Under the IMI Code, owners can usually ask for a new assessment on the grounds that the value is outdated once three years have passed since the last relevant assessment or update. The request is free and goes to the Tax Authority on the Modelo 1 IMI declaration.

What are the next dates to watch?

A request has to be filed by December 31 for the new value to count in the current tax year, which affects the IMI paid in 2027. A request made now leaves the November instalment unchanged, because that payment follows the earlier assessment.

Source: The Portugal News