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IMI and IMT exemptions: who is entitled in 2026?

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Not everyone pays IMI, and not everyone pays IMT when buying a home. There are currently at least four separate routes to an IMI exemption, and three to an IMT exemption - each with its own audience, conditions and deadlines. This guide sets them all out.

Building on Avenida Almirante Reis, Lisbon, a Reabilita project
Avenida Almirante Reis, Lisbon · Reabilita project
2026 context
The income and property value limits for IMI and IMT exemptions are updated every year based on the Social Support Index (IAS) and on the IMT brackets themselves. The values below are those in force in 2026 - always check the current value on the Portal das Finanças before deciding on the basis of them.

IMI - the four routes to exemption

1. Permanent exemption - low-income households

Granted for life and renewed automatically every year by the Tax Authority, with no application needed. It applies when, cumulatively:

  • The household's gross annual income does not exceed €17,295.59 (2.3 times 14 IAS, in 2026);
  • The total VPT of all the household's properties does not exceed €75,198.20 (10 times 14 IAS, in 2026);
  • The property is the household's own permanent home.

2. Temporary exemption - purchase or completion of works on your own home

It lasts 3 years, extendable to up to 5 years depending on the city council's decision, and can be used at most twice by the same household over a lifetime. Conditions:

  • Property VPT up to €125,000;
  • Household taxable income up to €153,300;
  • Change of tax address to the property within 6 months of the purchase or completion of the works;
  • Application to the Tax Authority within 60 days after that deadline, with no debts to the Tax Authority or Social Security.

3. Exemption for properties renovated in an ARU

A 3-year exemption from the year the works are completed, renewable for a further 5 years on application and by decision of the municipal assembly. It requires an improvement of at least 2 levels in the property's state of conservation (to "good" or higher) and compliance with energy-efficiency requirements. It applies to properties intended as a permanent own home or for residential rental.

This benefit adds to the reduced 6% VAT already explained in the article on ARUs. See What is an ARU and why does it reduce VAT on renovation?

4. Exemption for moderate-rent lettings

New in the 2026 Housing Tax Package: properties let with rent up to €2,300/month (the same conditions explained in the article on rental taxation) are fully exempt from IMI for the first 8 years, moving to a 50% reduction from the 9th year.

See the full conditions in How is rental income taxed in 2026?

A property let at a moderate rent can combine an IMI exemption, a 10% IRS rate and, if it is in an ARU, 6% VAT on works - three separate benefits at the same time.

IMT - the three routes to exemption

Regime Full exemption up to Partial exemption up to
General, permanent own home €106,346 Progressive brackets above this value
Youth IMT (≤35 years old, first home) €330,539 Up to €660,982, with a marginal rate of 8% on the excess
Renovation in an ARU No value limit Full exemption on the first transfer of the renovated building

Youth IMT: the requirements not shown in the table

Besides the value limit, Youth IMT requires the buyer to be 35 or younger on the date of the deed, not to be considered a dependant for IRS purposes, and not to have owned (or co-owned) a home in the previous three years. The exemption also covers Stamp Duty and registration fees, and can apply to only half of the purchase if only one of the buyers meets the requirements.

Renovation in an ARU: exemption with no value cap

Unlike the other two regimes, the IMT exemption for buildings renovated in an ARU does not depend on the property's value - it applies to the first transfer for consideration after the renovation, provided the property is intended as a permanent own home or for residential rental, and that the renovation has been certified by the city council on the same terms required for the IMI exemption.

Caution - the formal process has to be flawless
IMI and IMT exemptions on renovated properties are not automatic: they depend on the developer having strictly followed the entire process required by the council. This includes an inspection before the works start, to establish the initial state of conservation; approval of the project, which must be followed to the letter - with no discrepancy on site compared with what was approved, down to the materials of the window frames, the grilles concealing the air conditioning or the colour of the façade; and a final inspection by the council, specifically for the purpose of granting the benefit. Any deviation from the approved project, however small, can put the future owners' right to the exemption at risk.

Note for non-resident buyers

The 2026 Housing Tax Package introduced a flat IMT rate of 7.5% for purchases by non-residents, regardless of the property's value - replacing, in these cases, the normal progressive brackets. It is worth simulating both scenarios before closing a purchase through a corporate structure or as a non-resident individual.

Is it enough for the property to be in an ARU to guarantee the exemption?

No. The developer must have completed the whole formal process with the council: an inspection before the works, an approved project with no deviation on site, and a final inspection to grant the benefit. A single detail outside the project can cost the buyer the exemption.

Does the IMT exemption for renovation in an ARU apply to any buyer?

Yes - unlike Youth IMT, there is no age or value limit, provided the property is intended as a permanent own home or for residential rental.

Can a 34-year-old use Youth IMT on a €500,000 home?

Yes, but only partially - the first €330,539 are exempt, and a marginal rate of 8% applies to the difference up to €660,982.

This article is for general information only and does not replace personalised tax advice. How these exemptions apply depends on the specific situation of the property, the buyer and the household - we always recommend checking with a certified accountant or lawyer before making decisions.