Luxembourg has reported a recent decision of the European Court of Justice (case C-432/23, dated 26 September 2024) that could have a bearing on EOIR. In this decision, the European Court of Justice confirms that a legal advice falls within the scope of legal privilege, whatever the matter of the legal advice and cannot be accessed by the tax authority for purposes of applying the European directive on administrative cooperation in the field of taxation, which is an EOI instrument among the European Member States. Consequently, it considers a Luxembourg domestic provision (Article 177(2), General Tax Law), as applied in the case at hand, as not compatible with the European rules, since this provision allowed to waive the professional secrecy of lawyers for the tax administration “in respect of facts of which they became aware in connection with advice or representation in tax matters”.
Although limiting the access powers of Luxembourg as regards information held by lawyers, this decision of the European Court of Justice does not depart from the standard regarding the scope of legal privilege. Nevertheless, Luxembourg should report on this matter in its next self-assessment.