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Permilagem: how a Portuguese condominium fee is really split

Permilagem is your fraction’s relative value in the building, fixed in the deed of horizontal property and expressed in thousandths. It is what the budget approved by the owners’ assembly is shared by, and it explains why two neighbours with similar flats pay different fees.

8 min readReviewed By Thorben Rasmus IdelReviewed by Nahar Geva

TL;DR

Permilagem is the relative value of each fraction in a building, expressed in thousandths, and article 1418(1) of the Portuguese Civil Code requires it to be fixed in the deed of horizontal property. The permilagens of all fractions add up to 1000. Article 1424(1) requires common expenses to be paid in proportion to the value of the fractions, not by floor area and not in equal shares, so each owner’s fee is the annual budget multiplied by their permilagem. Lift expenses follow a rule of their own, in paragraph 4: only owners whose fractions can be served by the lift take part in them, which means a shop with its own street entrance does not pay while a first-floor flat does even if the resident always takes the stairs. When part of the building falls outside, the lift bill is shared only among the fractions that take part, and each of their shares rises. On top of all this comes the common reserve fund, which is mandatory and equal to at least 10% of the owner’s share of the remaining expenses.

One sentence of the Civil Code decides everything else

The question that brings people to this topic is nearly always the same: why do I pay more in condominium fees than my neighbour, when the flats are similar? The answer sits in a single sentence, in article 1424(1) of the Portuguese Civil Code as amended by Law 8/2022: expenses necessary for the conservation and use of the common parts, and those relating to the payment of services of common interest, are paid by the owners in proportion to the value of their fractions1.

Notice what the law picked as its criterion, and what it did not. Not the floor area of the flat. Not the number of people living in it. Not consumption of anything. It is the relative value of the fraction, and that value has a name and a place of its own.

Permilagem is read, not calculated

Article 1418(1) requires the deed of horizontal property to fix the relative value of each fraction, expressed as a percentage or in thousandths of the total value of the building2. That figure, and only that figure, is what the condominium uses. And because it is a figure fixed in a document, permilagem is not a sum an owner performs: it is a fact an owner looks up.

That has a practical consequence which catches many people out. Two fractions with the same layout and the same area can carry different permilagens, because what the deed fixes is relative value and not surface. A top floor with a view, a terrace for exclusive use or an included parking space weigh more than a first-floor inward-facing flat with the same plan. Anyone trying to deduce their permilagem by dividing their square metres by the building’s square metres will reach a plausible number that is wrong.

Where to look, easiest first:

  • the fraction’s urban property tax register entry, on the Portuguese tax portal;
  • the deed of horizontal property, usually attached to the purchase deed;
  • the condominium administrator, who necessarily holds the full list, because that is what the fees are issued from.

A simple check closes the matter: added together, the permilagens of all the fractions in the building come to 1000. If you add up your building’s and do not get there, the problem is in the deed and not in your arithmetic. Article 1418(3) goes as far as making the absence of this specification a ground for the deed to be void.

From budget to fee: the sum, step by step

The owners’ assembly approves an annual budget. Each fraction’s fee is that budget multiplied by its permilagem, plus two corrections the law imposes.

Take a building with 24,000 EUR of general expenses a year, plus 3600 EUR for the lift alone, and a fraction of 45 thousandths:

StepSumAnnual amount
Share of general expenses24,000 EUR × 45 ‰1080 EUR
Share of lift expenses3600 EUR × 45 ‰162 EUR
Remaining condominium expenses1080 EUR + 162 EUR1242 EUR
Common reserve fund10% of 1242 EUR124.20 EUR
Annual fee1242 EUR + 124.20 EUR1366.20 EUR
Monthly fee1366.20 EUR ÷ 12113.85 EUR

The two middle lines deserve explaining, because they are the ones the law treats differently from the rest.

The lift: the word that settles the arguments

Article 1424(4) is short and carefully worded: only owners whose fractions can be served by the lift take part in lift expenses1.

The test is possibility, not use. Someone on the first floor who always takes the stairs still pays, because their fraction can be served by the lift; no resident can ask to be excused for not using it. A shop with its own street entrance that the lift does not reach is outside, and that is not a matter of agreement between neighbours: it is what the law provides.

Article 1424(3) generalises the idea to any common part: expenses on common parts serving only some of the owners fall on those who use them.

What happens to the sum when part of the building falls outside

Here is the consequence that is almost never explained. The lift bill does not shrink because some fractions do not take part: it is simply shared among those that do.

If the ground-floor shops account for 150 of the 1000 thousandths, the remaining 850 carry the whole 3600 EUR. For our fraction of 45 thousandths, the lift share stops being 162 EUR and becomes 190.59 EUR a year, because the same bill is now divided by 850 rather than 1000. There is nothing irregular about it: it is the direct effect of the rule in paragraph 4, and it is why it is worth knowing how many of the building’s thousandths are actually inside the lift account.

The common reserve fund is added to the fee

Article 4 of Decree-Law 268/94 makes it compulsory to set up, in every condominium, a common reserve fund to cover the cost of conserving the building. Its paragraph 2 sets each owner’s contribution in a sentence worth reading slowly: each owner contributes an amount corresponding to at least 10% of their share of the remaining condominium expenses3.

The decisive word is remaining. It means the other expenses, that is, those which are not the fund. The 10% is computed on the share of those expenses and added to it. In the example above, a 1242 EUR share carries a further 124.20 EUR, and the annual fee is 1366.20 EUR. The wrong reading, on which 10% of the fee would be set aside inside it, would give 1242 EUR and a monthly fee of 103.50 EUR instead of 113.85 EUR.

Note the words at least, too. Ten per cent is the legal minimum, not the mandatory figure, and the assembly can vote a higher one, which is in fact prudent in an older building with works ahead. Paragraph 4 of the same article requires the fund to be deposited with a bank, and paragraph 3 requires any amount the assembly has decided to spend on another purpose to be replaced within twelve months.

When the fees can be equal for everyone

They can, but less often than people think. Article 1424(2) allows expenses relating to the payment of services of common interest to fall on the owners in equal shares or in proportion to their use. The exception comes, however, with three cumulative conditions1:

  1. it must appear in a provision of the condominium regulations, not in a one-off vote at any given meeting;
  2. that provision must be approved without opposition, by a majority of owners representing the majority of the total value of the building;
  3. the criteria must be properly specified and justified.

And its reach is limited: it covers services of common interest, not the expenses necessary for conserving the common parts, which continue to be shared by the value of the fractions.

Two notes for anyone buying or selling a fraction

The first is about debts. Article 1424-A, added by Law 8/2022, requires the administrator to issue, within a maximum of ten days, a written statement of all condominium charges in force on the fraction and of any existing debts, and that statement is a compulsory document for the deed. Liability for the debts is measured by when they should have been settled, and amounts falling due after the transfer belong to the new owner. The buyer may waive the statement, but in doing so expressly accepts liability for any debt the seller owes the condominium, which is rarely a good idea.

The second is about who owes. Article 1424(1) says the expenses are the responsibility of the owners of the fractions at the moment of the relevant resolutions. It is the date of the resolution that fixes who owes, not the date the work is carried out.

What the calculator does with all this

The condominium fees calculator starts from your fraction’s permilagem and the approved annual budget, applies the proportion in paragraph 1, handles the lift separately under paragraph 4, lets you say how many thousandths actually take part in those expenses, and adds the common reserve fund on top, returning the monthly and the annual fee. It deliberately leaves out the equal split of paragraph 2, because that depends on a provision in your own condominium’s regulations rather than on the default regime.

And it is worth remembering that the fee is not the only annual cost of owning a fraction: property tax is charged on the same property’s taxable property value, and anyone letting it out can deduct condominium expenses against rental income tax.

Common mistakes

  • Thinking the reserve fund comes out of the fee

    This is the mistake that wrecks the most figures, and one word of the statute settles it. Article 4(2) of Decree-Law 268/94 requires each owner to contribute to the fund an amount corresponding to at least 10% of their share of the REMAINING expenses of the condominium. Remaining means the other ones, that is, the expenses that are not the fund. The 10% is computed on the share of those expenses and added to it. Someone with a 100 EUR share of running costs pays 110 EUR a month, not 100 EUR of which 10 EUR is set aside. The difference is 10% of the fee, every month, for the life of the building.

  • Sharing expenses by the floor area of the fraction

    The law speaks of value, not surface. Article 1424(1) requires expenses to be paid in proportion to the value of the fractions, and article 1418(1) provides that it is the deed of horizontal property that fixes the relative value of each fraction, expressed as a percentage or in thousandths of the total value of the building. Two fractions with the same layout and the same area can therefore carry different permilagens, because a top floor with a view, a private terrace or an included parking space are worth more than an inward-facing ground floor with the same plan. Anyone deducing their permilagem from square metres will arrive at a plausible number that is not the one the condominium uses.

  • Assuming that people who do not use the lift do not pay

    Article 1424(4) is worded with care: only owners whose fractions CAN be served by the lift take part in lift expenses. The test is the possibility of the fraction being served, not the behaviour of whoever lives there. Someone on the first floor who always takes the stairs still pays, because their fraction can be served by the lift. Someone with a shop that has its own street entrance, which the lift does not reach, does not pay. A resident cannot ask to be excused on the ground that they never use it.

  • Assuming the lift bill shrinks when some fractions fall outside

    It does not shrink, it changes denominator. If the ground-floor shops account for 150 of the building’s 1000 thousandths and do not take part in lift expenses, the remaining 850 thousandths carry the whole bill. Each participating fraction’s share rises in the same proportion: on a 3600 EUR lift budget, a fraction of 45 thousandths goes from 162 EUR to 190.59 EUR a year. It is elementary arithmetic and it is rarely explained at the meeting, which is usually why the figures feel wrong.

  • Assuming the assembly can simply split everything equally

    It can, but only for part of the expenses and subject to a demanding requirement. Article 1424(2) allows expenses relating to services of common interest to fall on the owners in equal shares or in proportion to their use, and requires for that a provision in the condominium regulations, approved without opposition by a majority of owners representing the majority of the total value of the building, with the criteria properly specified and justified. Expenses necessary for conserving the common parts continue to be shared by the value of the fractions, and a one-off vote at an ordinary meeting does not replace the provision in the regulations.

Frequently asked questions

What is the permilagem of a fraction?
It is that fraction’s relative value within the building as a whole, expressed in thousandths. Article 1418(1) of the Portuguese Civil Code requires the deed of horizontal property to fix the relative value of each fraction, expressed as a percentage or in thousandths of the total value of the building, and the absence of that specification can even make the deed void. Added together, the permilagens of all the fractions in a building come to 1000. A fraction of 45 thousandths is worth, for condominium purposes, 4.5% of the building.
How is a Portuguese condominium fee calculated?
You multiply the annual budget approved by the assembly by the fraction’s permilagem and divide by twelve for the monthly figure. Lift expenses are counted separately, because only the fractions the lift can serve take part in them. The common reserve fund is then added, at a minimum of 10% of the share of the remaining expenses. On a budget of 24,000 EUR of general expenses plus 3600 EUR for the lift, a fraction of 45 thousandths pays 1080 EUR plus 162 EUR, that is 1242 EUR, plus 124.20 EUR of reserve fund, giving 1366.20 EUR a year or 113.85 EUR a month.
Does the ground floor pay for the lift?
It depends on whether the fraction can be served by the lift, not on whether the occupier uses it. If the lift stops on that floor and serves the fraction, it takes part in the expenses even if the resident never uses it. If the fraction has its own street entrance and the lift does not reach it, it does not take part. That is the test in article 1424(4) of the Civil Code, which speaks of fractions that can be served. Many ground-floor shops fall into the second situation, but not all: a ground-floor flat reached through the building’s common entrance normally pays.
Is the reserve fund taken out of the fee or added to it?
Added to it. Article 4(2) of Decree-Law 268/94 sets each owner’s contribution at least 10% of their share of the remaining condominium expenses, so it is computed on that share and added to it. The fund is compulsory in every condominium, is meant to cover the cost of conserving the building and must be deposited with a bank. If the assembly votes to use it for another purpose, the owners have twelve months to replace it through an extraordinary levy.
Where do I find my fraction’s permilagem?
In the deed of horizontal property, which usually accompanies the purchase deed, and also in the urban property tax register entry for the fraction, which you can consult on the Portuguese tax portal. If you have neither, the condominium administrator necessarily holds the list of permilagens, because that is what the fees are issued from. A simple check: add up the permilagens of all the fractions in the building, and the result should be 1000.
Can the fees be the same for every fraction?
Only in part, and only through the condominium regulations. The default rule is proportion to the value of the fractions. Article 1424(2) allows expenses relating to the payment of services of common interest to fall on the owners in equal shares or in proportion to their use, but it requires a provision in the regulations approved without opposition by a majority of owners representing the majority of the total value of the building, and also that the criteria be properly specified and justified. Expenses for conserving the common parts are always shared by value.
Who pays arrears when the fraction is sold?
Liability for existing debts is measured by when they should have been settled, so it stays with whoever owned the fraction at that time, and amounts falling due after the transfer belong to the new owner. Article 1424-A requires the administrator to issue, within ten days, a written statement of all charges in force on the fraction and of any debts, and that statement is a compulsory document for the deed. The buyer may waive it, but in declaring so they expressly accept liability for any debt the seller owes the condominium.

Sources

  1. 1.Portuguese Civil Code, article 1424: charges for conservation and use, as amended by Law 8/2022 · Procuradoria-Geral Distrital de Lisboa · retrieved 15 Aug 2026
  2. 2.Portuguese Civil Code, article 1418: content of the deed of horizontal property · Procuradoria-Geral Distrital de Lisboa · retrieved 15 Aug 2026
  3. 3.Decree-Law 268/94 of 25 October: regulatory rules of the horizontal property regime · Procuradoria-Geral Distrital de Lisboa · retrieved 15 Aug 2026

Author / Reviewed by

Author

Thorben Rasmus Idel

Co-founder & writer

Co-founder of Calculadora Capital and the writer behind the methodology on every calculator and article. An entrepreneur and active investor, Thorben founded Idel Versandhandel GmbH, an international trading company operating across 16 countries, and invests across stocks, ETFs and cryptocurrency. He writes the methodology and verifies the math behind each page, drawing on hands-on business and investing experience to keep the tools and explanations grounded in how money, markets and taxes actually work for everyday people in Portugal.

Reviewed by

Nahar Geva

Co-founder & reviewer

Co-founder of Calculadora Capital and the independent reviewer behind every calculator and article. An entrepreneur and active investor, Nahar brings a data- and product-driven mindset together with hands-on experience in the markets, investing across stocks and ETFs as well as cryptocurrency and other digital assets, alongside broader personal finance and real estate. On each page Nahar reviews the methodology and double-checks the math and figures, pressure-testing how the tools and explanations hold up against the way money, markets and taxes actually work for everyday investors.

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