Inheritance Tax: Plan Ahead and Save Legally

Spain's Inheritance and Gift Tax (Impuesto sobre Sucesiones y Donaciones, ISD), governed by Law 29/1987, taxes the gratuitous transfer of assets between individuals at rates that vary significantly by autonomous community — from effectively 0% in Madrid or the Canary Islands (which apply near-total allowances for direct heirs) to rates exceeding 30% in other regions. Art. 20.2.c LISD provides a 95% reduction on family business interests transferred on death, subject to three cumulative conditions: genuine economic activity of the entity, a minimum shareholding (5% individually or 20% with family), and management remuneration exceeding 50% of employment and business income; many autonomous communities have increased this reduction to 99%.

Why Inheritance Tax Can Destroy Family Wealth Without Planning

For Spanish business families, the Inheritance and Gift Tax is the greatest threat to the continuity of wealth built over decades. The same estate can attract a rate of 1% in Madrid or 34% in Asturias depending on where the deceased was resident: a difference of several million euros on the same assets, with the same family and the same business. Added to this is the complexity of the family business exemption under Art. 20.2.c LISD: a 95% reduction (or 99% in some communities) that can turn a multi-million-euro tax liability into a manageable amount, but whose loss through a single missed condition activates the deferred assessment plus late-payment interest. Many families discover this risk when it is too late to plan.

Our Inheritance and Gift Tax Planning Process

Our team combines specialist tax advisers and lawyers with expertise in succession planning. The process begins with a patrimonial diagnostic that quantifies the tax burden under the current structure and the potential saving with planning. On that basis, we design the optimal sequence: verification and maintenance of family business conditions, staged lifetime donations with integrated optimisation of the donor’s IRPF on latent gains, usufruct and bare ownership structures for real estate and corporate interests, and fiscal residence planning where the difference between communities justifies it. We coordinate with notaries to formalise each instrument and monitor compliance with family business conditions for the five years following the transfer.

Regulatory Framework: Family Business Exemption, Regional Regimes, and International Successions

The ISD is governed by Law 29/1987 and its Regulations. Art. 20.2.c LISD provides the 95% family business reduction, subject to three cumulative conditions: genuine economic activity of the entity, minimum shareholding (5% individually or 20% with family), and exercise of management functions with remuneration exceeding 50% of employment and business income. Autonomous communities have full regulatory competence to enhance these benefits, creating enormous divergences between territories. The EU Succession Regulation (EU 650/2012) determines the applicable civil law for international successions, though each member state retains its own tax rules. The step-up — exemption of unrealised gains in the deceased’s IRPF — applies in inheritance but not in donations, where the donor pays tax on latent gains.

Real Results in ISD Planning: Savings of up to 95% on Family Business Transfers

• Quantification of the current tax burden and the savings achievable with planning: concrete, comparable figures.
• Verification of all Art. 20.2.c LISD conditions and a five-year maintenance plan.
• Staged donation strategy with integrated calculation of the donor’s IRPF impact and the recipient’s ISD.
• Usufruct and bare ownership structures formalised before a notary and coordinated with the family protocol.
• Heir liquidity plan — life insurance, prior donations, or credit lines — so no one is forced to sell strategic assets to pay the tax.

The Inheritance and Gift Tax is, paradoxically, one of the most avoidable taxes in the Spanish system when planned in advance, and one of the most costly when faced without preparation. The family business exemption under Art. 20.2.c LISD is the most powerful planning instrument for business-owning families. A 95% reduction (or 99% in communities that have enhanced it) on family business interests can transform a multi-million-euro liability into a manageable amount. However, the exemption is not automatic: it requires three cumulative conditions that must be planned years in advance and maintained for five years after the transfer. A single missed condition — for example, the shareholder ceasing to exercise management functions before the five years have elapsed, or the company investing in assets unrelated to the business — can trigger the deferred assessment plus late-payment interest, converting the saving into a contingency.

Succession planning that accompanies the ISD has dimensions that go beyond the tax itself. The optimal structure for minimising the tax burden must be coherent with the family protocol, the objectives of each family branch, and business continuity. It is not uncommon for the most tax-efficient structure — for example, concentrating shareholdings in one person to secure the control requirements — to create tensions with equitable distribution among heirs or with the autonomy of each family branch. Our advisory integrates these dimensions to achieve solutions that are sustainable over the long term.

Lifetime donations are the complementary instrument to the will that offers greater planning flexibility. They allow wealth to be distributed when conditions are favourable — when assets carry a lower value, when regional rules favour the donation, or when the donor wishes to see heirs manage the transferred assets during their lifetime. However, the taxation of latent gains in the donor’s IRPF (the so-called “step-up” operates in reverse for donations) demands a careful calculation of the net efficiency of each transaction: the ISD saving may be partially offset by the IRPF cost if the donated asset carries a significant latent gain. Our tax planning team performs this integrated calculation to ensure every decision is globally optimal.