The 2026 Spanish Regional Tax Competitiveness Index (RTCI) evaluates the 19 autonomous communities on more than 60 variables across five tax categories—individual income tax, wealth tax, inheritance tax, transfer taxes and stamp duties, and other regional taxes. The index produces a composite score that highlights each region’s overall tax structure, pinpointing strengths and weaknesses for policymakers, businesses, and taxpayers.
Main Tax Trends in 2026
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Solidarity wealth tax – The central government made permanent a “solidarity wealth tax” on net assets above €3 million. Several regions (Andalusia, Cantabria, La Rioja, Madrid, Murcia) introduced a deduction that offsets the difference between the regional wealth‑tax liability and the solidarity tax, preserving regional revenue while offering relief to individuals with net wealth below €3 million. Extremadura did not adopt the deduction, allowing the central government to collect the full amount. The Balearic Islands and the Valencia Community raised the exemption thresholds to €3 million and €2 million, respectively. A Constitutional Court ruling on whether the top marginal rate increase from 2.5 % to 3.5 % violates the prohibition on confiscatory taxation is still pending.
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Inheritance tax relief – Following earlier RTCI recommendations, 11 regions now provide 99 % relief for close heirs. Spain still has the world’s highest inheritance tax rates, reaching 87.6 % for unrelated or distant heirs, which drives many taxpayers to sell assets to avoid the tax.
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Automatic inflation indexing – La Rioja became the first region to legislate automatic indexation of all tax brackets, personal allowances, and family allowances when inflation hits or exceeds 3 %. The Basque provinces (Biscay, Álava, Guipúzcoa) also indexed personal allowances and income‑tax brackets in December 2025, with Gipuzkoa and Biscay adjusting family allowances as well.
Highest‑Ranked Regions (2026)
| Rank | Region | Key Features |
|---|---|---|
| 1 | Community of Madrid | Strong scores across all five RTCI components. Potential improvements: lower top inheritance tax from 34 % to 25 %, eliminate wealth‑based inheritance adjustments, index income‑tax brackets to inflation, and reduce the first‑bracket rate by 0.5 pp. |
| 2 | Biscay (Basque Country) | High wealth‑tax component score; introduced its own solidarity tax. |
| 3 | Álava (Basque Country) | Similar wealth‑tax performance; already adjusted family allowances for 2025. |
| 4 | Guipúzcoa (Basque Country) | Wealth‑tax rank 17th; could raise the wealth‑tax exemption threshold and lower the rate. |
| 5 | Canary Islands | Gained rank by indexing income tax to inflation. Suggested reforms: introduce a wealth‑tax credit equal to the solidarity‑tax difference, cut personal income rates by 3 pp, and bring the top marginal rate to 47.5 % (Germany level). |
Lowest‑Ranked Regions (2026)
| Rank | Region | Main Weaknesses |
|---|---|---|
| 19 | Catalonia | No significant 2026 reforms; levies twice as many regional taxes as any other community; poorly structured income, inheritance, and wealth taxes. |
| 18 | Asturias | Minimal impact from 2026 income‑tax reform; highest inheritance tax liability among regions; needs broader income and inheritance tax overhaul. |
| 17 | Aragon | No reforms; shortcomings in income, wealth, and inheritance taxes; should repeal new regional taxes on wind and solar farms. |
| 16 | Castilla‑La Mancha | Dropped one place; lack of major reforms; overtaken by Valencia Community. |
| 15 | Galicia | Dropped two places; recommendation to repeal the tourist tax and fully exempt wealth tax by raising the current 50 % relief to 100 %. |
Notable Regional Changes
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Valencia Community – Rose two places to 14th overall. Reforms include:
- July 2026 reduction of personal income‑tax rates across all brackets, with further cuts slated for 2027.
- Slight reductions in property‑transfer tax and stamp duty (effective July 2026).
- Wealth‑tax exemption threshold increased from €1 million to €2 million (second consecutive year).
- Introduction of a 25 % inheritance‑tax relief for certain extended family members, rising to 50 % from June 2027.
- Despite reforms, the combined top marginal income‑tax rate remains 53.85 %, the fourth‑highest in Europe.
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Navarre – Moved up two places to 12th. 2026 changes:
- Employment‑income deduction threshold raised from €10,500 to €12,500.
- Personal allowance increased by €1,280 for taxpayers earning up to €17,500.
- Recommendations: lower rates on incomes above €35,000, increase personal/family allowances, cut all brackets, and bring the top marginal rate to 47.5 % (Germany level). Annual inflation indexing would also curb fiscal drag.
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Balearic Islands – Advanced to 11th place, mainly due to Valencia’s decline. Further reforms needed in personal income tax and lower property‑transfer and stamp‑duty rates.
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Castile and León – Dropped to 13th after a methodological change: its environmental impact tax is now counted as four separate taxes, improving comparability.
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La Rioja – Fell to 6th place after being overtaken by the Canary Islands, which benefitted from income‑tax inflation indexing.
Overall Observations
- Regions that index tax brackets and allowances to inflation tend to improve their competitiveness scores (e.g., Canary Islands, La Rioja, Basque provinces).
- Inheritance‑tax relief for close heirs is now common, but the high rates for distant heirs (up to 87.6 %) remain a major deterrent.
- Wealth‑tax thresholds and rates vary widely; regions offering higher exemptions or credits (e.g., Madrid’s deduction, Canary Islands’ proposed credit) achieve better rankings.
- Comprehensive reform—simultaneously addressing income, wealth, and inheritance taxes—appears necessary for low‑ranking regions to close the gap.
The full 2026 Spanish Regional Tax Competitiveness Index report (in Spanish) is available for download: IACF‑2026‑Revisado‑OK‑28‑SEP‑2026.pdf.
Source article: taxfoundation.org
