On 7 October 2026, the Czech Constitutional Court (Ústavní soud) delivered a landmark judgment affirming that lawyer–client confidentiality (advokátské tajemství) constitutes a constitutional barrier for tax administrators during evidence gathering. The case originated from a tax audit where the financial administration sought access to communications between a taxpayer and their legal counsel. The Court ruled that the right to legal assistance under Article 36(1) of the Charter of Fundamental Rights and Freedoms extends to tax proceedings, and any compelled disclosure of privileged communications violates constitutional protections. This decision sets a binding precedent for all tax authorities and courts, reinforcing the principle that tax investigation powers cannot override fundamental procedural rights.
Key Takeaways
- Absolute Privilege Protection: The ruling establishes that legal professional privilege is absolute in tax matters; tax administrators cannot request, seize, or use privileged documents even if they suspect tax evasion. This aligns Czech practice with EU Court of Justice precedents (e.g., AM&S Europe Ltd v Commission).
- Practical Compliance Guidance: Companies should ensure that sensitive tax analyses, legal opinions, and communications with external counsel are clearly marked and stored separately from business records. Internal legal department communications may not enjoy the same protection unless the lawyer is an independent advocate (advokát).
- Impact on Tax Audits and Disputes: Tax authorities must now adjust audit procedures to exclude privileged materials. Taxpayers can confidently assert privilege to resist overbroad document requests, potentially limiting the scope of evidence available to the administration in transfer pricing, VAT, and CIT disputes.
Disclaimer: This article is compiled and summarized by the AI based on publicly available information and is for general information purposes only. It does not constitute any form of formal tax advice, legal opinion, or basis for performance. Please consult a qualified professional tax advisor or legal counsel for tax advice.
Source: Read Official Announcement