Updated as of July 2026
In Catalonia, when several members of the same family become co-owners of a property — whether through inheritance, a joint purchase, or by pooling resources for a family business — Spanish Civil Code does not apply directly; instead, Catalan civil law applies: Book Five of the Catalan Civil Code (property rights) for ordinary co-ownership, and Book Four (successions) for co-ownership arising from inheritance. This is a distinct legal framework, with notable differences from the common regime that applies in the rest of Spain (regarding administration, division of the asset and, above all, how debts are shared among co-heirs), on top of taxes that are fully transferred to the Generalitat (Inheritance and Gift Tax and Transfer Tax/Stamp Duty) with their own rates and rebates.
In this guide we explain, with a tax-focused, practical approach for Catalonia residents, what a co-ownership arrangement between family members is under Catalan law, how it is established, how each co-owner is taxed, and how to dissolve it at the lowest possible tax cost.
1. Co-ownership in Catalonia: its own legal framework
Unlike the rest of Spain, where co-ownership is governed by articles 392 to 406 of the Civil Code, in Catalonia this arrangement has its own, more detailed civil regulation, set out across two different legal bodies depending on the origin of the co-ownership:
| Origin of the co-ownership | Applicable law | Key articles |
|---|---|---|
| Joint purchase, voluntary contribution, or any other “ordinary” co-ownership | Book Five of the Catalan Civil Code (Law 5/2006, of 10 May) | Art. 551-1 and 552-1 to 552-12 |
| Inheritance with several heirs before distribution | Book Four of the Catalan Civil Code (Law 10/2008, of 10 July), which refers to the ordinary co-ownership rules in Book Five | Art. 463-1 and related |
Article 551-1 CCCat sets out the general definition: co-ownership exists when two or more people jointly and concurrently hold title to ownership or another property right over the same asset or the same estate. Catalan law adds an important nuance with no express equivalent in the Spanish Civil Code: co-ownership is never presumed, unless expressly provided for by law; however, once co-ownership exists, it is presumed to be an undivided ordinary co-ownership, unless proven otherwise.
It should also be noted that most of the rules in Book Five CCCat on ordinary co-ownership are default rules, not mandatory ones: the co-owners may agree on a different regime (even, if they wish, applying the rules of the Spanish Civil Code), and that agreement prevails over the supplementary Catalan rule.
2. Undivided ordinary co-ownership (Book Five CCCat)
When several family members (for example, siblings who jointly buy a flat, or parents and children who pool resources for a business premises) share title to an asset without it being physically divided, what the Catalan Civil Code calls an undivided ordinary co-ownership is created (art. 552-1 CCCat and following).
Main features
- Co-ownership by shares: each co-owner holds a right over the whole of the asset, proportional to their share, which is presumed equal unless proven otherwise.
- Fruits and returns (for example, rental income from a leased flat) belong to the co-owners in proportion to their share. If only one of them has collected the income, they must account to the others under the rules on administration of others’ property.
- No co-owner may alter the object of the co-ownership, even to improve it or make it more profitable, without the consent of the others.
- Co-owners’ liability for obligations arising from administration is joint (several), not joint and several, in proportion to their respective shares — unlike other regimes of Germanic tradition where liability can be joint and several.
Administration: majorities depending on the type of act (art. 552-7 CCCat)
The Catalan system distinguishes three levels, more detailed than the common regime:
| Type of act | Majority required |
|---|---|
| Ordinary administration (upkeep, repairs, hiring staff to collect fruits) | Majority of co-owners, weighted by the value of their share; binds the dissenting minority |
| Extraordinary administration (improvements that increase the asset’s productivity) | Qualified majority of three quarters of the shares |
| Acts of disposal (selling, encumbering, mortgaging) | Unanimity of all co-owners |
Acts required by law (for example, taking out compulsory insurance or paying taxes levied on the shared asset) may be carried out by any co-owner, even against the opposition of the others, with the right to demand proportional reimbursement plus statutory interest from the date of the claim.
Costs of upkeep, use and yield of the asset, as well as reform and improvement costs agreed by the majority, are shared proportionally to each co-owner’s share (art. 552-8 CCCat).
3. Co-ownership arising from inheritance in Catalonia (Book Four CCCat)
When a person dies and several heirs jointly accept the inheritance before it has been distributed, what is known as co-ownership arising from inheritance is formed, regulated under article 463-1 of the Catalan Civil Code. This arrangement is transitional, intended to end once distribution takes place, but it has a feature that sets it notably apart from the regime under the Spanish Civil Code and that is essential to understand:
The most important difference: how inheritance debts are divided
Under the Catalan legal tradition, rooted in Roman law, the debts and charges of the estate are divided among the co-heirs in proportion to their respective shares, with no joint-and-several liability among them (art. 463-1 CCCat). This means each heir is liable only for their proportional share of the debt, not for the whole.
This approach contrasts with the Germanic-tradition system followed by the Spanish Civil Code in the rest of Spain’s autonomous communities under common law, where, generally, heirs may be held jointly and severally liable to the estate’s creditors until distribution takes place. In practice, this has an important consequence for creditors: they must pursue all co-heirs together, or each individually for their proportional share, and cannot claim the full debt from a single heir.
As for the assets, this is also not a typical ordinary co-ownership over specific items: each co-heir is attributed an ideal share of the whole estate, not of specific assets or rights, until distribution takes place.
Liability depending on the type of acceptance
- Simple, unconditional acceptance: heirs are liable for the debts and charges of the estate, but always in proportion to their share.
- Acceptance subject to benefit of inventory: heirs are not liable with their personal assets, only with the assets of the estate. Under the current wording of the Catalan Civil Code, this benefit has become, in practice, the general rule, since it applies even if the deceased had prohibited it, and even if the heir accepts the inheritance without expressly stating a wish to rely on it, provided an inventory is made within the set deadlines.
4. Key differences from the Spanish Civil Code
| Aspect | Catalan Civil Code | Spanish Civil Code (common regime) |
|---|---|---|
| Governing law | Book Five (ordinary co-ownership) and Book Four (co-ownership arising from inheritance) | Arts. 392-406 CC |
| Division of inheritance debts | No joint-and-several liability among co-heirs, proportional to share (art. 463-1 CCCat) | Traditionally liability that can become joint and several until distribution |
| Majority for extraordinary administration | 3/4 of the shares (a category specific to Catalan law) | This intermediate category is not distinguished; a simple majority or unanimity applies |
| Forced-adjudication rule | A co-owner holding 4/5 or more of the shares may demand adjudication of the entire asset by paying the rest in cash (art. 552-11.4 CCCat) | No explicit equivalent rule exists |
| Agreement not to divide | Up to 10 years by unanimous agreement; up to 5 years if minors or incapacitated persons are involved and division would harm them | Up to 10 years, renewable |
| Nature of the rule | Mostly a default rule: applying the Spanish regime instead can be agreed | Mandatory in its basic features |
This last rule, the 4/5-share rule, is one of the most useful and least well-known tools in Catalan law: if a sibling or family member ends up holding 80% or more of the share in an asset (for example, after buying out other co-heirs’ shares), they can demand — through the courts or before a notary — adjudication of the entire asset, compensating the rest in cash, without needing unanimity.
5. How to set up a co-ownership arrangement between family members
Co-ownership arising from inheritance
This is created automatically upon joint acceptance of the inheritance, with no further formalities required. It is nonetheless advisable to formalize the acceptance and distribution of the estate in a public deed before a notary, which is mandatory if real estate is involved.
Voluntary ordinary co-ownership (joint purchase or family business)
- It can be set up by means of a private document, although a contract setting out the identity of the co-owners, the object, the contributions, the percentage share of each, the administration system and the grounds for dissolution is highly recommended.
- A public deed is mandatory if real estate or property rights are contributed, with subsequent registration in the Land Registry for greater legal certainty.
- If the co-ownership carries out an economic activity (for example, a family business), it is necessary to:
- Obtain a tax ID number for the co-ownership using form 036 with the Tax Agency.
- Register for tax purposes, indicating the activity and the VAT taxation regime.
- Register with the self-employed social security scheme (RETA) any co-owners who actually work in the business.
- Obtain, where applicable, a municipal business licence and register for the business tax (IAE).
6. Taxation: personal income tax, VAT, inheritance/gift tax and transfer tax in Catalonia
This is the area where the practical differences are most noticeable in Catalonia, because while personal income tax and VAT are state taxes with the same