Over 100,000 Portuguese taxpayers are now subject to the AIMI property tax, marking a significant expansion of the controversial levy since its introduction in 2017. The tax, targeting high-value residential and commercial properties, has grown steadily—from just 1,500 taxpayers in its first year to over 100,000 in 2024, according to the Portuguese Ministry of Finance. For homeowners and investors, AIMI represents a growing financial burden, with tax rates reaching up to 7.5% for the most valuable properties. Here’s what you need to know about how it works, who is affected, and what’s next.
The Imposto Municipal sobre Imóveis (AIMI) was introduced in 2017 as a municipal tax on high-value properties, designed to generate additional revenue for local governments. Initially, it applied only to properties valued above €600,000, but successive adjustments have lowered the threshold and expanded its scope. Today, AIMI applies to residential properties valued above €1.5 million and commercial properties valued above €750,000, with progressive tax rates increasing based on property value. The tax is calculated annually and paid in a single installment, typically due by August 31 each year.
According to the Portuguese National Statistics Institute (INE), the number of taxpayers subject to AIMI has surged in recent years, reflecting both rising property values and a broadening of the tax base. In 2020, there were approximately 30,000 taxpayers; by 2022, that number had more than doubled to 65,000. The latest figures from the Ministry of Finance confirm the milestone of over 100,000 taxpayers in 2024, driven in part by post-pandemic real estate market recovery and increased property valuations.
Who Pays AIMI and How Much?
AIMI is structured as a progressive tax, meaning the higher the property’s value, the greater the tax rate. The current brackets are as follows:
- €1.5 million to €1.75 million: 0.75%
- €1.75 million to €2 million: 1%
- €2 million to €2.5 million: 1.5%
- €2.5 million to €3 million: 2%
- €3 million to €5 million: 2.5%
- Above €5 million: 3.5%
- Commercial properties above €750,000: Rates start at 0.4% and increase progressively up to 7.5% for properties valued above €10 million.
For context, a property valued at €3 million would incur an AIMI tax of €75,000 annually (2.5% of €3 million), while a €10 million property would pay €750,000 (7.5% of €10 million). These rates are applied to the cadastral value of the property, which is determined by municipal authorities and may differ from market value.
The expansion of AIMI has drawn criticism from property owners, who argue that the tax disproportionately affects high-net-worth individuals and investors. The Confederation of Portuguese Property Owners (Confederação dos Proprietários) has repeatedly called for reforms, citing concerns over affordability and the impact on retirement savings tied to real estate. Meanwhile, municipal governments have welcomed the additional revenue, with some using AIMI funds to invest in local infrastructure and services.
Why Has AIMI Grown So Rapidly?
The surge in AIMI taxpayers can be attributed to several factors:
- Rising property values: Portugal’s real estate market has seen significant growth in recent years, driven by demand from both domestic buyers and foreign investors. According to Portugal’s National Notary Association, property prices in Lisbon and Porto have increased by over 30% since 2020.
- Lowered thresholds: The government has progressively reduced the value thresholds for AIMI eligibility, bringing more properties into the tax net. In 2021, the threshold for residential properties was lowered from €600,000 to €1.5 million, and further adjustments have since been made.
- Increased property transactions: The post-pandemic boom in real estate transactions has led to more properties being reassessed and brought under AIMI’s scope. The Bank of Portugal reports that mortgage lending for high-value properties has risen by nearly 40% since 2022.
- Municipal demand for revenue: Local governments have actively encouraged the expansion of AIMI to fund public services, particularly in high-value real estate markets like Lisbon, Cascais, and the Algarve.
The growth in AIMI taxpayers also reflects broader economic trends. Portugal’s property market has become increasingly internationalized, with foreign buyers accounting for nearly 20% of transactions in prime urban areas. This has led to higher concentrations of high-value properties in cities like Lisbon, where the average property price now exceeds €500,000, pushing more owners into AIMI’s tax brackets.
Who Is Affected and How?
AIMI primarily impacts three groups:
- High-net-worth individuals: Portuguese citizens and residents who own properties valued above €1.5 million, including primary residences, vacation homes, and investment properties.
- Foreign investors: Non-resident property owners, particularly those from the EU and the UK, who have purchased high-value real estate in Portugal. Many of these investors rely on rental income, which is now subject to additional tax burdens.
- Commercial property owners: Businesses and landlords with properties valued above €750,000, including hotels, offices, and retail spaces.
For homeowners, AIMI represents an additional annual cost that can significantly impact disposable income. In Lisbon, where property values are among the highest in the country, AIMI can add thousands of euros to annual taxes. For example, a €2 million apartment in the city center would incur a tax of €30,000 annually (1.5% of €2 million).
Investors, particularly those relying on rental income, face a double burden: AIMI on the property itself and income tax on rental profits. The Portuguese Property Lawyers Association has noted that some landlords are adjusting rental prices upward to offset AIMI costs, potentially reducing affordability for tenants.
Commercial property owners, particularly in tourist-heavy regions like the Algarve, are also feeling the pinch. AIMI rates for commercial properties can reach 7.5%, making it one of the highest property taxes in Europe. Small businesses and startups operating from high-value spaces may struggle to absorb these costs, leading some to relocate to less expensive areas.
What’s Next for AIMI?
The future of AIMI remains a topic of debate in Portugal. While the tax has proven successful in generating revenue—contributing over €500 million annually to municipal budgets—it has also sparked calls for reform. Key developments to watch include:
- Potential threshold adjustments: The government may further lower the value thresholds for AIMI eligibility, bringing even more properties into the tax net. Proposals to include properties valued above €1 million have been discussed in recent legislative sessions.
- Exemptions and reliefs: Some municipalities have introduced temporary exemptions or reduced rates for certain property types, such as primary residences or properties used for social housing. However, these measures are often short-lived and subject to change.
- Legal challenges: Property owners have filed multiple lawsuits challenging the constitutionality of AIMI, arguing that it disproportionately affects high-net-worth individuals. The Portuguese Constitutional Court is currently reviewing several cases, with a decision expected by late 2024.
- International comparisons: Portugal’s AIMI tax rates are now among the highest in Europe for high-value properties. Countries like Spain and France have similar taxes, but Portugal’s progressive structure and lower thresholds set it apart. The European Commission has not intervened, but ongoing discussions about tax harmonization could influence future AIMI policies.
For taxpayers, the next critical deadline is August 31, 2024, when AIMI payments for the 2024 tax year are due. The Ministry of Finance has urged property owners to review their tax assessments and ensure compliance, warning of penalties for late or non-payment. Municipalities are also expected to publish updated property valuations in the coming months, which could affect AIMI calculations for 2025.
Key Takeaways
- AIMI now affects over 100,000 taxpayers in Portugal, up from just 1,500 in 2017, reflecting rising property values and expanded tax thresholds.
- The tax is progressive, with rates ranging from 0.75% to 7.5% for high-value properties, applied annually to cadastral values.
- High-net-worth individuals, foreign investors, and commercial property owners are the primary groups impacted, with some facing annual taxes of tens of thousands of euros.
- Legal challenges and potential reforms remain on the horizon, with the Constitutional Court reviewing AIMI’s constitutionality and municipalities debating further adjustments.
- The next AIMI payment deadline is August 31, 2024, with updated property valuations expected to influence 2025 tax assessments.
For property owners seeking clarity on AIMI, the Portuguese Ministry of Finance’s official AIMI guide provides detailed information on tax brackets, exemptions, and payment procedures. Municipal tax offices also offer localized support for taxpayers.
As AIMI continues to evolve, its impact on Portugal’s real estate market—and the affordability of high-value properties—will be closely watched. For now, taxpayers are advised to stay informed about legislative updates and consult with tax professionals to optimize their compliance.
Have questions about AIMI or its impact on your property? Share your experiences or seek further clarification in the comments below.