Taxpayers in Castilla-La Mancha face new IRPF and property tax rules

The Government of Castilla-La Mancha has published Law 1/2026, of March 26, regarding Administrative and Tax Measures, in the Official State Gazette (BOE-A-2026-23387). This comprehensive reform modifies several key regional laws, affecting personal income tax (IRPF), property transfers, and the general administrative framework used by both citizens and businesses operating within the region.

What changes

Law 1/2026 introduces significant modifications to the regional tax and administrative landscape. The most impactful changes include:

• Taxation Reforms: The law modifies the legal framework for the Personal Income Tax (IRPF) and the Tax on Property Transfers and Documented Legal Acts (ITP/AJD). These changes alter how regional tax components are applied to taxpayers residing or conducting business in Castilla-La Mancha.
• Enhanced Legal Certainty: A major pillar of this law is the reinforcement of legal certainty for interested parties. This is achieved by adding Articles 9 octies and 9 nonies to Law 8/2013, which aims to protect the rights of citizens during administrative procedures.
• Administrative Modernization: The law updates various administrative procedures, specifically regarding electronic administration and the management of supplies and urban planning. This includes modifications to laws governing water supply, urbanism, and public services.
• Regulatory Repeal: The law officially repeals Decree 63/2005, of May 24, integrating its functions or replacing its provisions within the new legislative structure.

Context

This law does not exist in isolation; it is a corrective and updating measure designed to harmonize regional administration with current legal standards. By modifying Law 8/2013, the regional government is aligning its procedural safeguards with broader principles of legal protection. Furthermore, the law acts as a bridge between various existing regulations, modifying a wide array of previous statutes to ensure consistency.

Specifically, the law modifies several key pieces of legislation, including Law 4/2025, Law 2/2022, Law 2/2021, and Law 6/2017, among others. It also modifies the consolidated text approved by Legislative Decree 1/2023. The repeal of Decree 63/2005 signifies a shift towards a more unified administrative model, reducing regulatory fragmentation in the region. This reform is essential for maintaining a coherent tax system where regional IRPF and Property Transfer Tax Spain: Rates, Exemptions & ITP regulations are clearly defined and integrated into the modern electronic administration framework.

Who is affected and how

The impact of Law 1/2026 varies depending on the profile of the taxpayer or entity:

• Individuals (Particulars): Residents or those with tax obligations in Castilla-La Mancha will see changes in their tax burden due to the modifications in IRPF and property transfer taxes. The addition of Articles 9 octies and 9 nonies to Law 8/2013 provides individuals with stronger legal protections when interacting with regional administration, ensuring more transparent and predictable procedures.
• Self-Employed (Autónomos): Freelancers operating in the region are subject to the new IRPF rules and must comply with the updated administrative procedures. The enhanced legal certainty provisions are particularly relevant for those who frequently engage in administrative filings or disputes with regional authorities.
• SMEs (Pymes): Small and medium-sized enterprises must adapt to the new electronic administration standards. Since the law modifies procedures related to supply management and urbanism, businesses in sectors such as construction, logistics, or manufacturing may face new operational requirements for administrative compliance. They must also ensure their tax planning accounts for the updated regional tax rates.
• Large Companies and Professionals: Entities with significant activity in Castilla-La Mancha must monitor the changes in administrative law, particularly regarding electronic signatures, registries, and the management of public supplies, to avoid procedural errors.

What to do and when

The general entry into force of Law 1/2026 is scheduled for March 31, 2026, subject to specific exceptions mentioned in its final provision 6. To ensure compliance and optimize tax positions, the following actions are recommended:

• Tax Assessment: Taxpayers should evaluate how the modifications to the IRPF and property transfer tax laws will affect their specific tax liability for the 2026 fiscal year.
• Procedural Audit: Businesses and professionals should review their administrative workflows, especially those involving electronic administration and regional supply management, to align with the updated legal requirements.
• Legal Protection Review: Legal departments and individuals should familiarize themselves with the new Articles 9 octies and 9 nonies of Law 8/2013 to effectively exercise their rights in administrative proceedings.

Given the complexity of these changes, we recommend consulting with the relevant specialist area at BMC to evaluate your specific situation and ensure full compliance with the new regional regulations.