Family Business Inheritance Tax Relief in Spain: Requirements, Supreme Court Case Law and Risks

July 7th 2026

Article II

Spain’s 95% family business inheritance tax relief can cut 95% of the value of an inherited family company from the taxable base of Inheritance and Gift Tax (ISD), under article 20.2.c) of Law 29/1987. It is not automatic: the shares must qualify for the Wealth Tax exemption, a member of the family group must carry out paid management duties, and the heir must keep the assets for ten years (five in several regions). Madrid raised it to 99% from 1 July 2026, with its own requirements.

Inheriting the company that has supported a family for decades should not force the heirs to sell it to pay the tax. That is the purpose of the 95% relief. But the benefit is not handed over simply because the business is family-owned. It is granted to those who prove that it is one —by how it operates, how it is structured and how the family is involved— at the moment of death, and to those who keep it afterwards. Neglecting either of those points can trigger a supplementary assessment years later.

This article sets out, the requirements of the relief, when each one must be met according to the Supreme Court, and the conduct that causes it to be lost. It is written for founder-owners, designated heirs and advisers who need to know whether the benefit is solid or fragile in their case.

What is the 95% relief and where does it come from?

The 95% relief is an ISD benefit that reduces by 95% the value of an individual business, a professional practice or shares in companies passed on by inheritance to certain relatives, provided those assets qualify for the Wealth Tax exemption and the acquisition is kept for ten years. It is set out in article 20.2.c) of Law 29/1987 of 18 December on Inheritance and Gift Tax.

The benefit rests on two linked rules. Article 20.2.c) grants the relief to the deceased’s spouse, descendants or adopted children; where there are no descendants, it extends to ascendants, adopters and collateral relatives up to the third degree, and the surviving spouse is always entitled to it. But it does not set its own substantive requirements: it refers to the family business exemption in article 4.Eight of Law 19/1991 on Wealth Tax. For the inheritance to enjoy the 95%, the company had to be exempt in the deceased’s Wealth Tax; if it was not, the relief does not apply. That is why the position should be reviewed during the owner’s lifetime, not once the succession has opened.

ISD is also a devolved tax: the autonomous regions can improve the state relief or create their own. The answer therefore changes with the deceased’s region. Madrid, for instance, raised it to 99% from July 2026.

What does the family business exemption require?

For the shares to be exempt in Wealth Tax —and the inheritance to reach the 95%— article 4.Eight.Two of Law 19/1991 requires three conditions at once:

1. Genuine economic activity. The company’s main activity cannot be managing movable or immovable assets. It is deemed not to carry out an economic activity when, for more than 90 days of the year, more than half of its assets are securities or are not used for economic activities. Pure property-holding or portfolio companies fall outside.
2. Minimum shareholding. The deceased had to hold at least 5% of the capital individually, or 20% jointly with a spouse, ascendants, descendants or second-degree collateral relatives, whether by blood, marriage or adoption. This is the family group.
3. Paid management duties. Some member of the group had to actually perform management duties and receive for them a remuneration representing more than 50% of their total business, professional and employment income.

The third requirement generates the most disputes, and contains a nuance that saves many inheritances: where the shareholding is joint, the management duties and their pay must be met by at least one member of the family group (art. 4.Eight.Two, letter c, final paragraph). It need not be the heir who ran the company: it is enough that a relative in the group did. The child who managed the business while the father was already retired can be the piece that supports everyone’s exemption.

When must the requirements be met? The Supreme Court’s doctrine

The paid-management requirement is tested at the tax accrual date, but that moment —and the pay period examined— differs between an inheritance and a gift. It is one of the differences that triggers the most assessments.

For transfers on death, the tax accrues at the moment of death. In its judgment of 16 December 2013 (appeal 28/2010), the Supreme Court held that the 50% test is verified in the year of death, counting the remuneration from 1 January to the date of death, because the deceased’s personal income tax period closes at that instant. The full calendar year is not examined, only the fraction actually lived.

For gifts, the Court has been stricter. In its judgment of 31 October 2024 (appeal 2262/2023), followed by that of 13 November 2024, it held that the pay requirement is tested at the moment of the gift, taking the period running from 1 January of the year of the gift to the date of the gift. Attending to the last closed financial year, formerly common practice, has been rejected.

The proportionality rule: why 95% does not cover everything

Even where every requirement is met, the relief does not always reach 100% of the value of the shares. Article 4.Eight.Two of the Wealth Tax Act limits the exemption —and with it the ISD relief— to the proportion between the assets used for the activity (net of their debts) and the company’s net equity. Non-business assets, idle cash and investments unrelated to the business do not count.

Here a decisive line of case law comes in. In its judgment of 10 January 2022 (appeal 1563/2020), the Supreme Court clarified that cash and financial investments can be treated as business assets when they perform a real economic function —liquidity, solvency, access to credit— and that it is for the tax authority to prove they do not, once the taxpayer offers a reasonable explanation and supporting evidence. The practical effect is twofold: unexplained excess cash can cut the relief, but good documentary preparation lets you defend it.

An example: if a company has net equity of €4,000,000 and €800,000 is financial investment not shown to be business-related, the 95% relief applies only to €3,200,000; the remaining €800,000 is taxed with no relief. Review the balance sheet before the accrual date.

The ten-year holding period: what breaks it and at what cost

The relief is conditional. Article 20.2.c) requires holding the acquisition for the ten years following the death, unless the heir dies within that period. The law also prohibits acts of disposal or corporate transactions that, directly or indirectly, substantially reduce the value acquired; this duty, drafted for gifts, is expressly extended to inheritances (art. 20.6.c, final paragraph).

It helps to define “holding”. On inheritance, the state rule requires preserving the value of the acquisition for ten years, not necessarily the same assets: reinvesting or reorganising is possible as long as there is no substantial reduction in value. What does break the benefit is selling the company and spending the proceeds, winding up the company or hollowing it out. On gifts you must also keep the Wealth Tax exemption for those ten years —a requirement the state inheritance rule does not impose so literally, though many regions add it.

And if the condition is breached? You must pay the part of the tax not paid because of the relief, plus late-payment interest. It is not a penalty, but the cost of ten years of interest is not trivial, and the authority has that period to check.

Madrid 2026: the 99% relief under Law 3/2026

From 1 July 2026, the Region of Madrid applies its own 99% relief —not 95%— on transfers of family businesses, under Law 3/2026 of 30 June on Support for the Family Business (published in the BOCM on 30 June 2026). It is an autonomous, self-standing relief, incompatible with the state one, and requires electing it within the self-assessment period. Its requirements do not fully match the state rules.

Widening the beneficiaries and halving the holding period are the most relevant changes. But on gifts there is a warning: the regional relief does not guarantee exemption from the donor’s capital gain in personal income tax (IRPF). That exclusion (art. 33.3.c of the IRPF Act) applies only where the gift also meets the requirements of state article 20.6. A gift to a sibling, or from a donor under 65, may enjoy the 99% in Gift Tax and still generate a taxable gain in the donor’s IRPF. Calculate both taxes before signing.

Common mistakes that cause the relief to be lost

In practice, the relief is rarely lost through ignorance of it, but through neglect of the detail. The failures we see most often: a director who draws little from the family company and falls short of 50% in the year of death; cash whose business use is not evidenced and suffers a defensible cut; a sale or restructuring during the holding period read as a substantial reduction in value; and a poor choice between the state and regional relief, or electing it out of time.

Frequently asked questions

Is the 95% relief applied automatically or must it be claimed?

It must be applied in the ISD self-assessment and the requirements evidenced; it does not operate automatically. In regions with their own relief, such as Madrid from July 2026, you must also expressly elect the regional rules within the filing period.

Do I need to have worked in the company to inherit with relief?

Not necessarily. The paid-management requirement can be met by any member of the family group, not necessarily the heir (art. 4.Eight.Two, letter c, Law 19/1991): it is enough that a relative in the group ran the company and drew from it more than 50% of their income.

What happens if I sell the company before ten years?

The holding requirement is breached: you must pay the tax saved through the relief, plus late-payment interest, unless you reinvest and preserve the value without substantial reduction. In several regions the period is five years; in Madrid, five from 1 July 2026.

Does the company’s cash reduce the benefit?

It can: only the part of the value used in the activity qualifies. That said, the Supreme Court (judgment of 10 January 2022, appeal 1563/2020) accepts that cash and financial investments count as business assets if they serve a real economic function and this is properly documented. Evidence is decisive.

How does an inheritance differ from a gift here?

On a gift, the donor must be 65 or over (or incapacitated) and stop managing and drawing pay; the 50% test runs from 1 January to the date of the gift (SC 31-10-2024). On an inheritance there is no age requirement and the period runs to the death. A gift may also trigger a taxable gain in the donor’s IRPF.

Conclusion

The 95% relief —99% in Madrid from July 2026— is one of the most powerful tools for passing on a family business without draining it, but it is a conditional benefit: earned at the accrual date and kept for ten years (five in several regions). Reviewing the Wealth Tax exemption, the group director’s pay and the assets’ business use during the owner’s lifetime avoids most supplementary assessments. If you are about to inherit or plan the succession of a family business, take advice on your case before the accrual date: almost everything that goes wrong could have been fixed in time.

At Martínez-Cardós Abogados, we can help you plan and prepare for the generational handover in your family business, drawing on over 40 years’ experience in advising on and handling both inheritances and gifts involving family businesses.