Paying IMI continues to be, for many owners, one of those moments of the year that always raises the same question: if the house is mine, why do I have to pay tax every year? The answer is not just administrative. It has constitutional roots and is linked to the way the State finances public services.
According to Notícias ao Minuto, the explanation is based on fiscal principles with decades of history, but which remain far from common knowledge.
What’s behind the tax
IMI is a municipal tax that is levied on the asset value of properties. It does not depend on the owner’s income, nor on his personal situation, but only on the value attributed to the assets.
According to the same publication, this taxation is based on article 103 of the Constitution of the Portuguese Republic, which enshrines the principle that taxes are a way of financing public expenditure.
This is why IMI is classified as a real tax: it does not look at the taxpayer, but at the property. The logic, explains the website, involves ensuring that those who own assets contribute proportionally to the community’s costs, observing one of the pillars of the Portuguese tax system.
The principle of contributory capacity
IMI is directly linked to the so-called principle of contributory capacity, which establishes that each citizen must contribute to the State to the extent of their wealth or income. Although it is not explained literally in the Constitution, this principle is recognized by consensus in Portuguese and European tax law.
In this case, “wealth” is the value of the property. According to the same source, when taxing assets, the State assesses the owner’s economic ability to finance public services such as security, infrastructure, education or social support. It is a form of fiscal redistribution, in which those who have more assets contribute more.
IMI as a tax equality mechanism
Property taxation also seeks to ensure the principle of equality. According to the publication, IMI contributes to ensuring that the fiscal effort is distributed in a balanced way, preventing only income from work from supporting the bulk of public expenditure.
In this sense, the tax fulfills a dual function: it guarantees revenue for municipalities and reinforces the equity of the tax system, adjusting each citizen’s contribution to their overall financial capacity.
An obligation that is unlikely to disappear
Due to the constitutional and fiscal framework that gives rise to it, IMI is neither a circumstantial nor a transitory tax. It is deeply linked to the way in which the State finances itself and how equality in the distribution of public costs is guaranteed. Therefore, despite frequent criticism, it is unlikely to disappear in the near future.
As long as there is heritage, there will be IMI. And, as , this results from a fiscal model that aims to distribute responsibilities fairly, even if at first glance it seems contradictory to pay for something that already belongs to you.
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