A new index compares tax systems across Spain’s 19 regions using more than 60 variables across five tax areas, highlighting recent regional reforms on wealth and inheritance taxes and outlining where disputes and judicial review remain active.
The RTCI evaluates 19 Spanish regions on more than 60 variables across five tax categories to produce a comparable competitiveness score.
A Constitutional Court review is pending on the increase in the solidarity tax’s top marginal rate and on whether removing the tax’s temporary status exceeded the budgetary authority.
Index (RTCI) for Spain provides a single metric to compare how the country's 19 regions structure their tax systems. The index uses more than 60 variables grouped into five taxation areas: individual income tax, wealth tax, inheritance tax, transfer taxes and stamp duties, and other regional taxes. Policymakers and taxpayers can use the score to identify where a region's tax code is more or less competitive.
The RTCI aggregates measures across five major categories of regional taxation. It looks at statutory rates, bases, reliefs, and design features that affect competitiveness and mobility. The approach emphasizes practical comparisons between regions rather than a single issue focus, producing a roadmap for regional reform priorities.
Recent regional and national changes
Inheritance tax reforms and pressures
Following earlier RTCI recommendations, many regions adjusted inheritance taxes by offering 99 percent relief for close heirs. That change has brought the total number of regions offering this relief to 11. Some regions also expanded relief to other categories of beneficiaries, including more distant relatives.
Inheritance taxation remains a major pressure point. The report notes Spain has the highest inheritance tax rate in the world for certain cases, with the top rate for unrelated or distant heirs reaching 87.6 percent. Such high liabilities have led some taxpayers to disclaim inheritances or sell assets to avoid burdensome tax bills, motivating regional relief measures for close heirs.
Regions have made occasional adjustments to personal income tax elements to account for inflation. The RTCI continues to track these changes alongside transfer taxes, stamp duties, and other regional levies to create a composite view of competitiveness.
What this means for policymakers and taxpayers
The RTCI offers a comparative tool to prioritize reforms that reduce distortions and improve attractiveness for residents and entrepreneurs. Areas to watch include how regions balance revenue needs with relief measures after national policy changes, how courts rule on the legality of design changes to the solidarity wealth tax, and whether regions expand or roll back inheritance relief in response to behavioral effects like disclaimers and forced sales.
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