Tax Litigation and Administrative Contentious Proceedings

At ARCO’s Tax Litigation Department, we support our clients at critical moments, defending their interests with technical rigor, close engagement, and a firm commitment to excellence. Our goal is to provide reliable, transparent, and strategic solutions in a field as demanding as tax law.

Comprehensive Defense in Tax Proceedings

We offer advice and representation throughout all stages of the relationship with the Tax Administration, ensuring effective protection against any administrative action. Our team handles, among other matters involving tax implications:

• Administrative and economic-administrative appeals related to any tax and across all Spanish territories.
• Challenges to assessments, penalties, and management and collection acts issued by state, regional, or local tax authorities.
• Legal defense before contentious-administrative courts, the National High Court, the Supreme Court, and the Court of Justice of the European Union.
• Advisory services in collection procedures, particularly in situations of cash-flow difficulties, requests for deferrals or payment plans, and actions arising from non-payment.
• Defense in special proceedings for the allocation of tax liability, an area that has seen a significant increase in recent years.

Each case receives personalized attention, with tailored strategies designed to safeguard the client’s rights and interests with the utmost dedication.

Penalty Proceedings

We offer robust technical defense in penalty proceedings, acting from the very first request to ensure full compliance with all legal guarantees. Our commitment is to protect clients from disproportionate or unjustified actions, always seeking the best possible outcome.

Support in Tax Audits

In the event of a tax audit, we provide close, clear, and strategic assistance. We understand that these situations can generate uncertainty and significant concern, so we are fully committed to providing clients with the support and reassurance they need. We represent their interests before the Tax Administration, ensure fluid communication, and prepare each stage of the procedure with the goal of minimizing risks and navigating the process with confidence and security.