The flat in three names
Where several people own the same property and exploit it together, what exists is a comunidad de bienes, the ownership-in-common entity Spanish law recognises without any paperwork. No deed and no intention to create one are needed: it arises from shared ownership and from earning income together. And its treatment is peculiar, because the entity itself pays no tax.
What applies is the income attribution regime: the entity works out the profit under personal income tax rules and then attributes it to each co-owner in proportion to their share, keeping the same character. Each sibling declares their part in their own return, at their own rate and with their own family circumstances. And that is where the mismatch that causes the most family arguments appears: three siblings with identical shares can end up paying very different amounts on the same flat, because one of them has other income and another does not.
A co-owner declares the income corresponding to their share whether or not they were paid. If the sibling who administers leaves the money in the joint account or puts it towards a building levy, the income is still attributed. It is why amended returns surface years later, when somebody compares what was received with what was declared.
Modelo 184
Entities under the income attribution regime that carry on a business, and those whose income exceeds the threshold set by the rules, must file Modelo 184, an annual information return identifying the co-owners and setting out the income attributed to each. Nothing is paid with it, which is precisely why it is forgotten; but failing to file it carries its own penalty and it throws out the information the Agencia Tributaria, the Spanish tax authority, already holds on the co-owners.
If the entity also lets commercial premises, tax registration follows and VAT obligations appear in the name of the entity, with its own tax number. At that point it has stopped being a family arrangement. We handle it in self-employed in Spain.
If one of the co-owners lives abroad, their share does not sit quietly waiting: the income attributed to them is non-resident income and it is declared on Modelo 210, per property and per owner, with whatever costs their country of residence lets them take. Families usually discover this when the sibling who left comes back into the file years later.
When one of them wants out
The day comes when one sibling needs the money and the others do not want to sell. The usual exit is to dissolve the co-ownership: one of them keeps the property and pays the others off in cash. Properly structured, and where the asset is indivisible and the compensation matches the shares, the transaction is treated differently from a sale. Badly structured — with unjustified excess allocations, or compensation that does not add up — it can be taxed as a transfer, and a capital gain can appear in the one leaving.
It is one of those areas where the difference between a well-drafted deed and a badly drafted one runs into thousands of euros, and where the criteria are not settled at every edge. It is studied with the inheritance deed and the exact shares in front of us, never from hearsay. It connects with inheritance and gifts.
Who writes to us from Badalona
| Who | What has piled up |
|---|---|
| Three siblings letting their parents' flat | Income attribution, Modelo 184 and who declares what |
| The sibling who administers and pays the others | Justifying the split and not ending up declaring everyone's income |
| Co-ownership that also lets commercial premises | Its own tax number, tax registration and VAT in the name of the entity |
| The one who wants to buy the others out | Dissolving the co-ownership and the real cost of doing it badly |
| An heir living abroad | Income attributed to a non-resident and their Modelo 210 |
Our way of working in Badalona
We start by reconstructing the ownership: inheritance deed, shares, land registry extract and who has collected what since. With that we compute the attribution for the tax years still open — the limitation period is four years — and decide whether it is worth coming forward voluntarily, at the cost fixed by article 27 of the Ley General Tributaria, the Spanish general tax act, or whether the position is already in order.
All of it is done remotely and with one point of contact per family, so that nobody has to forward emails to four siblings. And one caveat: where there is a real family conflict, we advise on the tax side, we do not arbitrate the division.
If the siblings disagree about what should be declared, we put the rule in writing and each of them can take it to whoever advises them.
Three Badalona siblings and a let flat: who pays what
Marta is an employee, Jordi is retired on a modest pension and Laia has lived in Lyon for years. They inherited their parents' flat in equal shares, valued in the inheritance at 152,400 € including costs, and they let it for 800 € a month. The year works out like this:
| Item | Amount |
|---|---|
| Rent for the year | 9,600 € |
| IBI 520 + building fees 840 + insurance 280 | −1,640 € |
| Boiler repair | −1,200 € |
| Depreciation: 3 % on the 55 % that is building | −2,514.60 € |
| Net income of the co-ownership | 4,245.40 € |
| Attributed to each sibling | 1,415.13 € |
The same figure ends up in three different places. Marta adds it to her salary and is taxed at her marginal rate, the highest of the three. Jordi adds it to his pension and, even at 1,415 €, receiving rent in practice obliges him to file an income tax return where he did not before. Laia files no Spanish income tax return: she is non-resident and declares her share on a Modelo 210 at 19 %, 268.87 €, without the reduction for letting a home, which does not exist in non-resident income tax, but able to deduct costs because she lives in the European Union.
If Laia lived in Switzerland the sum would change: no deductible costs and a 24 % rate, so her third of the rent, 3,200 €, would pay 768 €, almost three times as much, for the same flat and the same share of ownership.
The calendar of the Badalona siblings' co-ownership
| When | Who | What |
|---|---|---|
| January | The co-ownership | Modelo 184 if required, with the details of all three |
| 1 to 20 April 2027 | Laia | Annual 210 for the 2026 letting; by the 15th if paid by direct debit |
| April to June 2027 | Marta and Jordi | Their income tax return, each with a third |
| When the town hall collects | Whoever manages the flat | IBI and charges, with the bill in one name and the cost shared by three |
It is also wise for the rent to go into an account in all three names, or at least for the split to be recorded month by month: it is the proof that each declared their own part. The 210 for the one living abroad is explained in the Modelo 210 guide. If there are past years in which one of them did not declare their share, it is put in order through tell us what has not been filed.
What almost nobody in Badalona asks: sometimes the flat is not let, and one of the siblings lives in it without paying the others anything. For that sibling it is the main home and there is no imputed income. For the others, their share is at the disposal of someone else without charge, and the usual reading of the tax authorities is that they must declare the imputed property income corresponding to their share, the notional income Spain attaches to homes that are neither let nor lived in by the owner. Nobody in the family sees it as income, so nobody declares it. If the one living there pays something, the sum changes again: it becomes a letting between relatives, with its own rules.