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AIMI in Portugal: Who Pays the Additional Property Tax and When
🏘️ What Is AIMI?
AIMI (Adicional ao Imposto Municipal sobre Imóveis) is an annual tax on the total tax value (VPT) of the urban properties you own in Portugal. It was introduced in 2017 and, unlike IMI, its revenue goes to the State (to the Social Security reserve fund).
🏠 Which Properties Count?
Included:
- Residential urban properties (houses and apartments)
- Land for construction
Excluded:
- Properties used for commerce, industry or services (and other similar uses)
- Properties that were exempt or not subject to IMI in the previous year
- Certain properties under affordable rental programmes
The AIMI is calculated on the sum of the VPTs of all the relevant properties you owned on 1 January of the year.
👤 Who Pays AIMI?
AIMI applies to individuals, companies, undivided estates (heranças indivisas) and other entities that are owners, usufructuaries or holders of a surface right of the relevant properties — residents and non-residents alike.
📊 Rates and Deductions
Individuals and undivided estates:
- A deduction of €600,000 applies — if your total VPT is below this amount, you don’t pay AIMI.
- 0.7% on the value above €600,000 up to €1,000,000
- 1% on the value above €1,000,000 up to €2,000,000
- 1.5% on the value above €2,000,000
Married couples and partners in a de facto union:
- They can opt for joint taxation, which doubles the deduction to €1,200,000 (and the thresholds for the higher rates).
Companies:
- 0.4% on the total VPT, without the €600,000 deduction
- Properties owned by companies but used personally by shareholders or directors are taxed at the individual rates
Entities in tax havens:
- 7.5% for entities domiciled in countries on Portugal’s list of privileged tax regimes
🧮 Example
An individual owns three apartments with a total VPT of €800,000:
- Taxable value: €800,000 – €600,000 = €200,000
- AIMI: €200,000 × 0.7% = €1,400 per year
If the same properties belonged to a married couple who opted for joint taxation, the deduction would be €1,200,000 — and they’d pay no AIMI.
📅 Important Deadlines
- 1 January: the properties you own on this date are the ones that count.
- April to May: married couples and partners can submit the option for joint taxation on the Portal das Finanças (the option remains valid in following years until it’s cancelled).
- June: the Tax Authority calculates the AIMI and issues the notice.
- September: payment of the AIMI (in a single payment, during the month of September).
💼 Can You Deduct AIMI?
If your properties generate rental income, AIMI can be deducted in some cases:
- Individuals (IRS): the AIMI related to rented properties can be deducted from the tax on that rental income, within limits.
- Companies (IRC): companies with rental or local accommodation activities can choose between deducting AIMI as an expense or as a tax credit, within limits.
⚠️ Common Mistakes
- Forgetting the joint taxation option — married couples and partners can lose the double deduction
- Thinking AIMI only applies to luxury homes — it’s the total VPT of all your residential properties that counts
- Holding properties through a company without planning — companies don’t benefit from the €600,000 deduction
- Missing the September deadline
🚀 Final Considerations
AIMI only affects owners with a significant total property value — but for those it does affect, good planning (joint taxation, ownership structure, deductions) can make a real difference.
📢 Expert Advice: If you’re married or in a de facto union and own properties with a total VPT above €600,000, check that the joint taxation option has been submitted. It can save you thousands of euros a year.
Own several properties in Portugal? Step Inside Portugal’s tax team can review your AIMI and help you structure your property portfolio efficiently — find out more about our tax services here. ✨
This article is for general information only and doesn’t constitute tax advice. It reflects the rules as of October 2026; confirm the rules that apply to your situation.
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