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IMI Calculator (Portuguese Property Tax)

How much IMI will you pay this year? This calculator estimates Portugal's annual municipal property tax (IMI) from your property's taxable value (VPT) and your municipality's rate, applying the family deduction where relevant. See the amount, the number of instalments and how it is reached.

IMI is your VPT (on the caderneta predial) × your municipality's rate. The urban rate ranges from 0.3% to 0.45% and is set each year by your municipality; rural buildings pay 0.8%. 2026 limits and deductions.

Annual IMI
€525.00

How the IMI is reached

Gross IMI (VPT × rate)€525.00
= Annual IMI€525.00

Payment

Above €500: paid in 3 instalments: May, August and November.

Educational estimate, not financial advice. It computes a single property's IMI (VPT × rate, less the optional family deduction); it does not include the AIMI, the surcharge on vacant buildings or temporary exemptions. Confirm your municipality's rate.

Video: how to use the calculator

What IMI is and who pays it

The Imposto Municipal sobre Imóveis (IMI) is an annual tax on the ownership of property located in Portugal. It is owed by whoever owns the property on 31 December of the year the tax relates to, and the revenue goes to the municipality where the property sits. It applies to urban buildings (such as your home) and to rural buildings (land).

How it is calculated

IMI is simple: you multiply the property’s taxable value (VPT), the value the tax authority assigns to the building, shown on the caderneta predial, by the municipal rate. As a formula: IMI = VPT × rate. The urban rate is set each year by each municipality, between 0.3% and 0.45%; rural buildings pay a fixed 0.8%. Note that the VPT is not the purchase price or market value of the home: it is usually considerably lower.

The family deduction and payment

Municipalities may grant a fixed deduction on the IMI of a permanent home, based on the number of dependents in the household: €30 (1 dependent), €70 (2) and €140 (3 or more): the so-called "IMI familiar". It is optional, so check whether your municipality applies it. As for payment, IMI up to €100 is paid in one go in May; between €100 and €500, in two instalments (May and November); above €500, in three (May, August and November).

Worked example

A home with a VPT of €150,000, in a municipality with a 0.35% rate and no family deduction: IMI = 150,000 × 0.35% = €525. As it exceeds €500, it is paid in three instalments (May, August and November). If the household has 2 dependents and the municipality offers the IMI familiar, €70 is deducted, leaving €455, and, by dropping below €500, it is then paid in two instalments (May and November).

Frequently asked questions

How is IMI calculated in 2026?
You multiply the property's taxable value (VPT), shown on the caderneta predial, by the municipal rate. For urban buildings the rate ranges from 0.3% to 0.45% (set each year by the municipality); rural buildings pay 0.8%. There may also be a deduction for dependents.
Where do I find my property’s VPT?
The taxable value (VPT) is on the property’s caderneta predial, which you can view on the Portal das Finanças. It is the tax value assigned by the tax authority: do not confuse it with the purchase price or market value, which are usually higher.
What is the IMI familiar and how much does it deduct?
It is a fixed deduction each municipality may grant on the IMI of a permanent home, by number of dependents: €30 (1), €70 (2) and €140 (3 or more). It is optional, it depends on the municipality adopting it, so check with your local council.
In how many instalments is IMI paid?
It depends on the amount: up to €100, paid once in May; between €100 and €500, in two instalments (May and November); above €500, in three (May, August and November). You can always choose to pay it all at once.
Does this calculator include the AIMI and exemptions?
No. It computes the base IMI of a single property (VPT × rate, less the family deduction). It does not include the Additional to IMI (AIMI) on high-value estates, the surcharge on vacant buildings or the temporary primary-home exemption: those cases are explained in the article.

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Sources

Author: Thorben Rasmus Idel · Reviewed by: Nahar Geva · Last reviewed: 2026-06-01