IMI rates for 308 municipalities: data for journalists
The 2025 table, verified on 2026-09-12. Files, charts and the method, to quote and republish with attribution (CC BY 4.0).
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How to credit us
The data is free to use, with attribution. We ask for a hyperlink rather than a mention alone: the link is what takes your reader to the source and lets them check the number.
Data: flatin.pt (CC BY 4.0)
The same in HTML
Data: <a href="https://flatin.pt/en/tools/imi-open-data/">flatin.pt</a> (CC BY 4.0)Primary source, if you name it: Portal das Finanças, Consultar taxas de IMI. https://www.portaldasfinancas.gov.pt/pt/main.jsp?body=/imi/consultarTaxasIMI.jsp
What the data says
- In the 2025 table, 199 of 308 municipalities apply 0,3 % to urban property — 66,3% of the 300 that have a single municipal rate.
- Between the 2024 and 2025 tables, 30 municipalities lowered the rate, 6 raised it and 260 kept it. 12 cannot be compared: in one of the two years the rate was set per parish.
- The highest rate in the 2025 table is 0,45 %, applied by 4 municipalities: Cartaxo, Nazaré, Oeiras, Vila Real de Santo António.
- 8 municipalities have no single municipal rate: they set it per parish (freguesia). In the file the cell stays empty — it is not zero. 4 are in that position in all 3 verified years.
The numbers on this page are recomputed from the files linked below. None of them is typed by hand.
Charts
PNG to publish, SVG to edit the text. All four are under CC BY 4.0 with the same credit line, already printed on the chart. The alt text is under each one, ready to paste.
Bar chart: municipalities by urban IMI rate, 2025 table. 0,3 %: 199; 0,301–0,349 %: 34; 0,350–0,399 %: 52; 0,400–0,450 %: 15; set per parish: 8.
Stacked bars: urban IMI rate compared with the previous year's table. 2023–2024: raised 0, lowered 43, unchanged 255, not comparable 10; 2024–2025: raised 6, lowered 30, unchanged 260, not comparable 12.
Dot plot: simple mean rate by district, 2025 table. Highest: Lisboa, 0,346 %. Lowest: 0,300 %, in Angra do Heroísmo, Beja, Funchal, Horta. The axis does not start at zero.
Dumbbell chart: every municipality of the Porto and Lisbon metropolitan areas in the 2023 and 2025 tables. 2 raised the rate, 11 lowered it, 18 kept it; 4 have no single rate in at least one of the two years. Simple mean in 2025: 0,330 % around Porto, 0,343 % around Lisbon.
The data
The same files this page is built from. No key, no sign-up.
- 2025 CSV CSV · 2026-09-12
- 2024 CSV CSV · 2026-09-15
- 2023 CSV CSV · 2026-09-15
- Every year in one file CSV
- Municipal boundaries with the rate (GeoJSON) GeoJSON
- JSON API JSON
- OpenAPI schema JSON
- One municipality with its history (example) Porto
Permanent citation: the dataset is archived on Zenodo with a DOI that always points to the newest version. 10.5281/zenodo.22935147
Method
Source: Portal das Finanças, Consultar taxas de IMI. Each municipality sets its rate by a vote of the municipal assembly and reports it to the tax authority by the end of the year the tax relates to. IMI for 2025 is paid in 2026.
Each table was harvested from the portal by a program and then verified line by line against that same source. The 2025 table was verified on 2026-09-12. A year without that check is not published — not here and not in the API.
A missing rate means the rate is set per parish, never zero. Those municipalities enter no average and no year-on-year comparison: they appear as “not comparable”.
Averages are simple means, not weighted by population, number of properties or taxable value. They are not the average tax paid.
Not in the data: per-parish rates, family IMI reductions, exemptions and tax benefits, AIMI, surcharges on vacant buildings, taxable values (VPT) and amounts collected. This analysis supports no conclusion about any of them.
When it changes
Next year's rate is voted in the autumn and reported to the tax authority by 31 December; without that report the minimum rate applies. We publish a new table once we have verified it — until then the latest verified year is 2025.
Contact
Questions about the data, a specific cut of it or a chart in another format: info@flatin.pt. We answer in English and Portuguese.
Who we are
flatin.pt publishes calculators and open data on the taxes of buying and owning property in Portugal. We do not provide estate-agency services and hold no AMI licence, and we give no tax advice.