The 99% bonificación on inheritance and gift tax for direct descendants and spouses (Groups I and II) is the single largest tax-arbitrage opportunity in HNW Spanish estate planning. A €15M parent-to-child transfer that costs €2.5M-€3M of ISD in Cataluña or in the absence of bonificación reduces to €25,000-€55,000 of effective tax under the Andalusian regime. The mechanics are straightforward — the strategic discipline is in qualifying for the bonificación, which turns on the heir's residency at the moment of the transfer rather than on any feature of the deceased or the assets. For UK, German, and US families with €5M+ Marbella exposure, the bonificación is the gravitational centre of any rational multi-generational structure.
Andalucía's inheritance and gift tax bonificación is regulated by Ley 5/2021 of 20 October of the Junta de Andalucía (which consolidated and extended earlier reforms from Decreto-ley 1/2019 and Ley 1/2018). It provides a 99% bonification on the cuota tributaria for transfers to Group I (descendants under 21) and Group II (descendants 21+, spouses, and ascendants) heirs and donees. The bonificación applies to both mortis causa (inheritance at death) transfers and inter vivos (lifetime gifts) transfers. For inheritance, the heir's habitual residence in Andalucía at the date of death drives eligibility (with the test being the autonomous community of habitual residence in the longest portion of the preceding 5 years per Ley 22/2009 art. 32). For inter vivos gifts of Spanish-situs real estate, the asset's location in Andalucía drives eligibility regardless of donee residency. The combined effect: a Group I/II heir or donee receiving a €15M asset under the bonificación pays roughly €25,000-€50,000 in ISD, versus €2,500,000-€5,500,000 without it.
The bonificación operates as the final step in the ISD calculation chain (see our Spanish inheritance tax deep-dive for the full chain). The national rules under Ley 29/1987 establish:
1. The taxable base (asset share minus deductions and personal allowance) 2. The progressive cuota íntegra (national scale 7.65%-34%) 3. The multiplier (coeficiente multiplicador 1.0-2.4 based on group and pre-existing wealth) 4. The cuota tributaria (cuota íntegra × multiplier, before regional reductions)
Andalucía's regional law then applies the 99% bonificación to the cuota tributaria — leaving 1% of the calculated amount payable. So a calculated cuota tributaria of €5,000,000 becomes a payable amount of €50,000.
The structural effect is to compress effective tax rates from the national 7.65%-81.6% range (Group IV with high pre-existing wealth) down to roughly 0.07%-0.82% for Group I/II Andalusian heirs.
The bonificación covers only Group I and Group II heirs and donees. Other groups remain on the standard scale.
The Group II inclusion of spouses is the structural reason most HNW couples in Marbella structure ownership jointly — the surviving spouse inherits at the bonificación, with the children inheriting again at the bonificación on the second death. Two qualifying transfers, both at 99% bonification.