Forced Heirs in Spanish Succession Law: The Legitima, Herederos Forzosos and How Much of Your Estate You Control (2026)

Spanish succession law does not give you the absolute freedom to leave your estate to whomever you wish. A significant portion is reserved by law for specific family members, called herederos forzosos or forced heirs. If you own a property in Spain, understanding how much of your estate you actually control, and how much is protected for your family, is essential before you write or update a will. This guide explains the legitima system, the three-way estate split, the spouse’s position, and how EU rules change the picture for foreign owners.

What is the legitima under Spanish law?

The legitima is the portion of a deceased person’s estate that the law reserves for specific forced heirs, and the testator cannot dispose of it freely. Article 806 of the Codigo Civil defines it as “the portion of goods of which the testator cannot dispose, having been reserved by law to certain heirs, called for this reason herederos forzosos.” Article 807 lists three categories of forced heir: children and descendants with respect to their parents and ascendants; in their absence, parents and ascendants with respect to their children and descendants; and the widower or widow in the form and measure the Code establishes.

Article 763 sets the practical boundary. A person who has no forced heirs can dispose of all their assets by will to anyone with legal capacity to acquire them. A person who does have forced heirs can only dispose of their assets “in the manner and with the limitations established in the fifth section” of the Code, which covers the legitima rules.

How much goes to children or descendants?

When a deceased person leaves children or descendants, Article 808 allocates the estate in three blocks. The legitima of the children and descendants is two-thirds of the estate. Of those two-thirds, the testator may apply one part as a mejora, meaning an improvement in favour of one or some of the children or descendants over the others (Article 823). The remaining third is of libre disposicion: the testator can leave it to anyone, family or not.

This produces the standard three-way split that Spanish succession planning revolves around: one-third legitima estricta (shared equally among all forced heirs), one-third mejora (distributable among children but only among descendants), and one-third libre disposicion (entirely at the testator’s discretion).

Article 813 reinforces the constraint. The testador cannot deprive forced heirs of their legitima except in cases expressly determined by law, meaning the strict grounds for disinheritance set out elsewhere in the Code. The testator also cannot impose burdens, conditions, or substitutions of any kind on the legitima, with two exceptions: the widow’s usufruct and the fideicomissary substitution over the strict legitima third for a judicially incapacitated child or descendant under Article 808.

What if there are no children but parents survive?

When there are no descendants, the forced heirship passes up the line. Article 809 fixes the ascendant legitima at one-half of the estate. If the spouse of the deceased also survives, the ascendant legitima is reduced to one-third of the inheritance. Article 810 divides the ascendant legitima equally between the father and mother if both survive; if one has died, the surviving parent takes the whole. Where there are no parents but ascendants in equal degree on both the paternal and maternal lines, the inheritance is split by halves between the two lines.

Article 811 adds a reserva obligation: an ascendant who inherits from a descendant assets that the descendant had received as a gift from another ascendant or from a sibling must reserve those assets for relatives within the third degree belonging to the line from which the assets came. This is the reserva viudal or legitima, distinct from the main forced heirship framework but relevant when assets have moved between generations by gift.

How is the legitima calculated?

Article 818 sets the calculation. To fix the legitima, you look at the value of the assets remaining at the testator’s death, deducting debts and charges but excluding those imposed by the will. To that net liquid value, you add the value of collationable donations. Article 819 then imputes donations made to children (that do not have the character of mejora) against their legitima, and donations made to strangers against the freely disposable portion. Any donation to a stranger that exceeds the free portion is reduced as inofficious under the rules in Articles 820 onwards.

The effect is that lifetime gifts do not escape the forced heirship net. A gift to a child during life is counted against that child’s legitima share, so the forced portion cannot be eroded by inter vivos transfers. A gift to a non-family member is charged against the one-third free portion, and the excess is recoverable into the legitima pool.

What does a surviving spouse receive?

The Spanish common-law system gives the surviving spouse a usufruct, not ownership, and the size depends on who else survives.

Scenario	Spouse’s right	Legal basis
With children or descendants	Usufruct of the tercio de mejora	Article 834
With ascendants but no descendants	Usufruct of half the estate	Article 837
No descendants or ascendants	Usufruct of two-thirds of the estate	Article 838

Article 834 provides that the spouse who, at the death of their consort, is not legally or de facto separated, and who concurs with children or descendants, has the right to the usufruct of the tercio destined for improvement. This is the standard position for a foreign property owner with a spouse and children: the spouse gets a life interest in one-third of the estate, the children take the legitima and the mejora, and the testator can leave the free third to anyone, including the spouse outright.

Article 838 is significant for owners with no living descendants or ascendants: the surviving spouse receives the usufruct of two-thirds of the estate, not the whole. The remaining third is freely disposable, so if the testator wants the spouse to inherit full ownership they must bequeath it under the libre disposicion third, or structure the estate so that the spouse is the named heir within the available portion.

How does the cautela socini work as a planning tool?

The cautela socini is a testamentary clause that gives each forced heir a binary choice: accept a larger share of the inheritance burdened with a condition the testator imposes, or take the bare legitima free of that burden. It is widely used in Spanish succession practice, particularly where the testator wants to grant the surviving spouse a universal usufruct over the whole estate while respecting the children’s legitima.

The mechanism works because Article 813 prohibits imposing burdens on the legitima itself, but the cautela socini does not impose the burden coercively. It offers the heir an option: accept more than the legitima with the burden attached, or fall back to the legitima estricta free of encumbrance. The DGRN resolution of 27 January 2020 confirmed this structure, holding that the heir who refuses the burden retains the legitima but loses the excess.

The clause has a structural weakness, as the firm Garrigues has analysed: if all forced heirs reject the burden, the sanction collapses because the children cannot be deprived of the legitima or the mejora third. The excess then passes by intestate succession to the same heirs, making the clause practically inoperative. With fewer children per family in Spain (the INE recorded a historic fertility low of 1.12 children per woman in 2023), the probability of all heirs rejecting increases, and testators are advised to draft a fallback disposition for the free third.

How does EU Regulation 650/2012 affect foreign owners?

For a foreign national owning Spanish property, the applicable succession law is determined by EU Regulation 650/2012, known as Brussels IV. The default rule in Article 21 is that the law of the state where the deceased had their habitual residence at death governs the succession as a whole. This means a British owner living in Spain could see Spanish forced heirship apply to their worldwide estate, including the Spanish property.

Article 22 provides the critical planning lever: a person can choose, in a will or codicil, the law of the state whose nationality they hold to govern their entire succession. A British national can choose British law, an American national can choose the law of their US state, and that choice overrides the Spanish forced heirship framework for the whole estate. Article 24 extends this to dispositions of property upon death, so the substantive validity of the will itself is governed by the chosen law.

The practical consequence is significant. A British owner who does nothing and dies habitually resident in Spain faces the two-thirds legitima split. A British owner who inserts a choice-of-law clause electing English and Welsh law can distribute the Spanish property according to English law, which does not impose forced heirship in the civil-law sense. The choice must be express and must reference the nationality held at the time of making the choice or at death.

Spain did not enter any reservation against Article 22, so it accepts the choice-of-law mechanism. This is the single most important planning step for a foreign property owner with a Spanish asset and a home jurisdiction that allows broader testamentary freedom than the Spanish system.

How does a worked example play out?

Consider a British owner with a Spanish property worth EUR 500,000, two adult children, and a surviving spouse. Under Spanish common law with no choice of law, the estate splits as follows: the two children share two-thirds (EUR 333,333) as their legitima, with the testator able to apply one of those thirds as a mejora to favour one child. The surviving spouse receives a usufruct over the tercio de mejora. The free third (EUR 166,667) can go to anyone, including the spouse outright.

With a choice of English law under Article 22, the owner can leave the entire EUR 500,000 property to the spouse, or split it in any proportion among the children, because English law does not impose the legitima structure. The children have no Spanish-law forced claim, provided the choice of law is validly made and the will is recognised in Spain.

The difference between the two outcomes is the entire value of the legitima, which is EUR 333,333 in this example. For most foreign owners, that is the reason to take succession planning advice and insert the choice-of-law clause before the question reaches the Spanish notary.

What should you do next?

If you own Spanish property and want to control who receives it, three steps matter. First, make a Spanish will or a valid foreign will that includes a choice of your nationality law under Article 22 of the EU Regulation, so that Spanish forced heirship does not override your distribution wishes. Second, if you choose Spanish law, understand that you can only freely dispose of one-third; the other two-thirds are locked into the legitima and mejora. Third, where a surviving spouse needs protection, consider the cautela socini or a direct bequest under the free third, and have a Spanish lawyer verify the clause against the DGRN jurisprudence. Our guides on Spanish wills for property owners, inheritance tax in Andalusia, and the non-resident inheritance process cover the practical filing steps that follow once the succession framework is settled.

This guide is general information, not legal or tax advice. Rules change and individual circumstances differ. Verify current requirements with an independent lawyer (abogado) or tax advisor (gestor/asesor fiscal) before acting.