The article argues for using a teleological interpretation of the Pillar 2 Directive to allow EU Member States to comply with Pillar 2’s soft law requirements for the qualified domestic minimum top-up tax (QDMTT) and its safe harbour (SH). This interpretation is necessary because the directive’s text is not aligned with certain requirements under Pillar 2 soft law since the directive was adopted before the Inclusive Framework issued any administrative guidance. Without the teleological interpretation, EU Member States cannot comply with the qualified domestic top-up tax (QDTT) requirements and, therefore, cannot attain its SH. This would decrease taxpayers’ legal certainty and undermine EU Member States’ fiscal interests.To pursue the argument, the article analyses Pillar 2’s soft law, i.e., the model rules, the commentary, and two sets of administrative guidance related to the QDMTT and its SH, and compares their provisions with the relevant provisions of the Pillar 2 Directive. Consequently, the study offers solutions to discrepancies between these two sets of rules and joins a broader discussion regarding the relationship between EU tax law and soft law.