IMI Explained: How Portugal's Property Tax Works and How to Pay It
If you own property in Portugal, you owe IMI every year — here's how the tax base is set, how much municipalities can charge, when it's billed, and how to check whether you qualify for an exemption.
- IMI is an annual municipal tax on the VPT (taxable patrimonial value) of property you own in Portugal, not on its market price.
- Ordinary urban-property rates are normally 0.3%–0.45%, with up to 0.5% in the exceptional municipal cases under Article 112 — rural land is 0.8%.
- AT bills you in the spring based on who owned the property on 31 December of the previous year, payable in 1 to 3 instalments depending on the amount.
- A primary permanent residence may qualify for a three-year exemption (sometimes extended by the municipality for two more years) or for the separate annual low-income exemption.
IMI (Imposto Municipal sobre Imóveis) is Portugal's annual property tax, charged on urban and rustic buildings located in Portugal. It's set out in the Código do IMI, approved by Decreto-Lei n.º 287/2003. The Autoridade Tributária (AT) assesses and collects it, but the money goes to the município where the property sits — which is also why the rate isn't the same everywhere.
What is IMI in Portugal?
IMI is the annual municipal property tax on the taxable patrimonial value (VPT) of Portuguese property. It is not a tax on your purchase price. The ordinary urban-property rate is set by the municipality; rural property has a separate rate. IMI is different from IMT, which concerns the purchase, and AIMI, which can apply separately to certain property portfolios.
When is IMI due in 2026?
The AT's 2026 calendar lists 1 June for the single or first payment, 31 August for the second payment where the annual bill exceeds €500, and 30 November for the final payment where the bill exceeds €100. These ordinary 2026 payments concern IMI for 2025. The law's usual months are May, August and November; use the actual collection notice for a late or additional assessment, not this ordinary schedule.
AIMI: the separate tax on property portfolios.
What IMI is actually charged on
IMI isn't calculated on what you paid for the property or what it would fetch on the open market. It's charged on the VPT (valor patrimonial tributário) — a tax value AT derives from a formula covering built area, location, quality and comfort, and the age of the building. The VPT is usually lower than market price, sometimes considerably so, which is part of why two similarly priced homes can carry very different IMI bills.
Rates: rural is fixed, urban is a municipal choice
- Rural property (prédios rústicos): a fixed 0.8% of VPT.
- Urban property (prédios urbanos): the normal legal band is 0.3% to 0.45%, with up to 0.5% in Article 112's exceptional municipal cases. The municipal assembly chooses the applicable annual rate and can differentiate it by freguesia.
- The rate you actually pay depends entirely on where the property is — always confirm the current rate for your município on the Portal das Finanças or the DGAL's Portal Autárquico rather than assuming a single national figure.
- The rate also changes in specific cases — the law itself triples it every year for urban buildings vacant for more than a year or in ruins (art. 112.º, n.º 3, CIMI), and municipalities can grant reductions tied to the number of dependants — so don't be surprised if your neighbour's rate differs from yours for reasons beyond the VPT.
Who's liable, and for which year
Whoever owns, holds usufruct over, or has a right of surface on a property on 31 December of a given year is the one liable for that year's IMI — in full, even if they sell the property the following week. If you're closing a sale near year-end, this is worth negotiating explicitly in the promissory contract, since the tax follows the calendar date, not the number of months owned.
How and when IMI is billed and paid
- AT calculates your VPT
The Autoridade Tributária (AT) values your property using the VPT formula — built area, location, quality/comfort, and age coefficients — to arrive at the valor patrimonial tributário, the tax base IMI is charged on.
- You're notified of the amount due
AT issues the collection note (nota de cobrança) based on the VPT and the rate your município applies that year, generally in April, covering the property you owned on 31 December of the previous year.
- A DUC payment reference is issued
Your payment reference (DUC) becomes available on the Portal das Finanças, showing the total due and how it's split across instalments.
- You pay in 1, 2, or 3 instalments
How many instalments you get depends on the total bill: up to €100 is paid in a single instalment in May; €100.01–€500 splits across May and November; above €500 splits across May, August, and November.
- Check your VPT — and appeal it if it looks wrong
If you disagree with a new direct valuation, you can request a second valuation within 30 days of notification. A separate claim that the registered VPT is outdated is generally available only after three years from the relevant valuation or update; market-distortion claims have specific conditions and can carry an initial fee.
Use the payment methods and reference on the AT collection note; these can include direct debit, homebanking or Multibanco. Fiscal-representation and electronic-notification duties for non-residents depend on residence jurisdiction and individual circumstances, so do not infer that obligation from the IMI bill alone.
IMI payment schedule
Art. 120.º n.º 1 CIMI sets how many instalments you pay from the size of the bill, and the months are fixed by law.
| Annual IMI bill | Instalments | When they fall due |
|---|---|---|
| €100 or less | 1 | May |
| Over €100 and up to €500 | 2 | May and November |
| Over €500 | 3 | May, August and November |
Do not treat a missed instalment as something you can catch up with the next one. Art. 120.º n.º 4 says that failing to pay an instalment by its deadline makes the remaining ones fall due immediately. Married couples and de facto partners can use the instalment table on the whole tax due even where a property is co-owned, for the home that is their permanent residence and fiscal domicile (n.os 6 and 7).
Enter your property's VPT and município to see the estimated annual bill and payment instalments.
Calculate my IMI billWorked example: a €150,000 VPT is not a €150,000 tax bill
Assume an urban property with VPT of €150,000, a confirmed municipal rate of 0.35%, and no exemptions, deductions or increases. The annual IMI is €150,000 × 0.0035 = €525. Because that exceeds €500, the ordinary schedule has three €175 instalments. The 0.35% is an example, not a quoted rate for your municipality. Check the tax year and adjustments on AT's collection note before paying.
For ordinary IMI paid in 2026, AT's annual calendar lists 1 June, 31 August and 30 November, according to the instalment band above. The June date follows the weekend rule; it does not change Article 120's general May schedule. A special or late assessment can have a different notice-specific deadline. See the official 2026 payment calendar.
No payment letter? Find the collection note, not a new estimate
AT says you can obtain another copy through Portal das Finanças or ask a tax office. Search for the IMI collection notes service; check the document, tax year, amount and payment reference. Use the current official IMI payment guidance. Our calculator estimates a bill; it does not issue a DUC or pay AT for you. Keep your payment receipt.
IMI exemption for a primary permanent residence
Portugal offers two distinct routes to an IMI exemption on a primary home — they're not the same benefit, and only one usually applies to any given household:
- Article 46 EBF temporary exemption: three years where an eligible built, extended, improved or purchased urban home becomes the household's permanent home within six months, prior-year household gross income is no more than €153,300, and VPT is no more than €125,000. A municipality may extend it by two years. For an eligible purchase the exemption is automatic when AT has the necessary data; other cases require a documented application. The benefit can only be recognised twice for the same taxpayer or household.
- Article 11.º-A low-income exemption: recognised automatically each year for residents where prior-year household gross income is no more than 2.3 × 14 × IAS and the household's combined VPT across all rustic and urban property is no more than 10 × 14 × IAS. With the official 2026 IAS of €537.13, those thresholds are €17,295.59 and €75,198.20 respectively. Late IRS or IMI declarations prevent the exemption.
These exemptions are distinct and their conditions must all be met. Confirm the exemption in the property record or collection note: the temporary exemption can end when its conditions cease, while the low-income exemption is tested by the AT every year.
Frequently asked questions
What is IMI in Portugal?
IMI is the annual municipal property tax on the taxable patrimonial value (VPT) of Portuguese property. It is not a tax on your purchase price. The ordinary urban-property rate is set by the municipality; rural property has a separate rate. IMI is different from IMT, which concerns the purchase, and AIMI, which can apply separately to certain property portfolios.
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When is IMI due in 2026?
The AT's 2026 calendar lists 1 June for the single or first payment, 31 August for the second payment where the annual bill exceeds €500, and 30 November for the final payment where the bill exceeds €100. These ordinary 2026 payments concern IMI for 2025. The law's usual months are May, August and November; use the actual collection notice for a late or additional assessment, not this ordinary schedule.
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What is the IMI rate, and how do I calculate it?
For ordinary urban property, the municipal rate is normally 0.3%–0.45%; Article 112 permits up to 0.5% in the exceptional municipal cases it specifies. Rural property is 0.8%. Multiply the relevant VPT by the applicable rate: €150,000 × 0.3% gives €450 before exemptions, reductions or increases. Check the municipality and assessment year; Portugal has no single urban IMI rate.
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How do I pay IMI if I did not receive the letter?
Consult the collection note on Portal das Finanças using your NIF and password, or request a duplicate from a Serviço de Finanças. Use the reference and deadline for the correct instalment. Payment options include Multibanco, homebanking and direct debit where arranged. Not receiving the letter does not itself cancel the bill or extend the deadline.
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Can I pay all my IMI at once, or wait until November?
Where IMI exceeds €100, AT allows the full amount to be paid during the first ordinary payment period instead of using the maximum instalments. That is not permission to defer the first payment until November. Missing an instalment by its deadline makes the remaining instalments immediately due under Article 120(4).
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When is IMI normally paid in Portugal?
Article 120 sets one payment in May for bills up to €100; May and November for bills over €100 and up to €500; and May, August and November for bills over €500. The actual year's deadline can differ because of calendar rules or an official extension. Check the year's AT calendar and the collection note rather than applying an old year's deadline.
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When must IMI be paid in 2026?
AT's ordinary 2026 calendar lists 1 June for the single/first payment, 31 August for the middle instalment where the annual bill exceeds €500, and 30 November for the final instalment where the bill exceeds €100. The tax normally concerns the previous year. Check your notice for a special assessment or an officially extended deadline.
How do I calculate IMI from my VPT?
For an ordinary urban property before exemptions or adjustments, multiply the VPT by the municipality's rate expressed as a decimal. An illustrative €150,000 × 0.35% gives €525 a year, not tax on the purchase price. The actual municipal rate and any increases or reliefs must be checked.
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What if I did not receive my IMI payment letter?
Obtain another copy of the collection note through Portal das Finanças or a tax office. AT's FAQ gives this route. A calculator estimate is no substitute for the collection note and its payment reference. Check your recorded address and retain the payment receipt.
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Who has to pay IMI, and as of what date?
Whoever owns the property — or holds usufruct or a right of surface over it — on 31 December of a given year is liable for that full year's IMI, even if the property changes hands shortly afterward.
Is the IMI rate the same across Portugal?
No. Rural property is taxed at 0.8%; the ordinary urban band is normally 0.3%–0.45%, with up to 0.5% in the exceptional municipal cases under Article 112. Check the annual rate for the specific municipality on Portal das Finanças or DGAL's Portal Autárquico.
Is my primary home automatically exempt from IMI?
No. The Article 46 exemption lasts three years, subject to income, VPT, use and timing conditions, and can be extended two years by municipal decision. It is automatic for an eligible paid acquisition when AT has the data; other Article 46 cases require an application. The separate Article 11.º-A low-income exemption is checked automatically each year for eligible residents.
What can I do if I think my property's VPT is too high?
You can request a second valuation within 30 days if you disagree with a newly notified direct valuation. A claim that a registered VPT is outdated generally requires three years to have passed since the relevant valuation or update. A market-distortion argument is a distinct, specifically regulated route and may carry an initial fee.
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