Italy has issued 2 regulations relating to the Administration of the Pillar 2 top-up tax. A November 7, 2025 Decree provides for more information on the rules for the submission of the GloBE tax return. Resolution no. 63 of November 10, 2025 provides for the tax codes to be used for the payment of top-up tax on the F24 payment form.

On March 6, 2025 a Decree of the Italian Ministry of Finance on Notification Requirements for Global Minimum Tax purposes was published in the Official Gazette. This provides more details on the double filing relief notification under Article 51(4) of Legislative Decree December 27, 2023, no. 209 (the Global Minimum Tax Law).

On December 31, 2024, Ministerial Decree of December 27, 2024 was published in the Official Gazette. This implements Article 4.1-4.3 of the February 2023 OECD Administrative Guidance and some aspects of the June 2024 OECD Administrative Guidance on deferred taxation.

The Ministerial Decree of December 27, 2024 published in the Official Gazette on December 31, 2024 provides for a number of miscellaneous, but important aspects of the OECD Administrative Guidance that were not included in the original Minimum Tax Law.

On October 15, 2024, Italy issued Decree 11, of October 2024 on the calculation of the Substance-based Income Exclusion (SBIE) under Pillar 2. This includes all of the OECD Administrative Guidance on the SBIE.

On May 21, 2024, the Italian Ministry of Economy and Finance issued a Decree providing further details on the application of the Transitional Safe Harbours.