Global tax compliance updates: OECD Pillar Two and country-specific changes
Pillar Two and the “side-by-side” package
The Organisation for Economic Cooperation and Development (OECD) Inclusive Framework on Base Erosion and Profit Shifting (BEPS) issued a framework for the U.S. tax system to coexist with the Pillar Two rules.
The “side-by-side (SbS) package,” released on Jan. 5, 2026, is a comprehensive set of measures that
provide several safe harbors for the Pillar Two rules. These measures have profound implications for U.S. multinational enterprises (MNEs), primarily exempting many of them from the main charging provisions of Pillar Two.
Consistent with ASC 740, which requires companies to reflect the effects of changes in tax law in the period that includes the enactment date, financial statements for calendar years 2024 and 2025 remain unaffected by the SbS package because legislation has not yet been enacted in most jurisdictions. Since Pillar Two is enacted through domestic legislation, a disconnect may occur between the timing of jurisdictions’ enactment of the SbS package and the years to which the safe harbors ultimately apply.
For accounting purposes, this could require companies to accrue top-up taxes in financial statements for periods ending before enactment, even if those liabilities may ultimately be reduced or eliminated once legislation implementing the SbS package is enacted.
The FASB indicated during 2023 that taxes under Pillar Two would be viewed similarly to an alternative minimum tax under ASC 740, and, therefore, deferred taxes would not be recognized or adjusted for the future effects of the Pillar Two minimum taxes.
Accordingly, the SbS package is not expected to significantly affect U.S. companies’ financial statements for periods ending prior to Jan 5, 2025. U.S. companies may continue to be subject to qualified domestic minimum top-up taxes (QDMTTs) and should continue to account for such QDMTTs under ASC 740.
Once the simplified effective tax rate safe harbor (SESH) becomes enacted and effective, companies should re-evaluate any uncertain tax positions related to top-up tax exposure. Companies may reasonably conclude that no Pillar Two tax liability is probable for qualifying jurisdictions, eliminating the need to measure top-up tax exposure under full Pillar Two mechanics. This significantly narrows the scope of jurisdictions requiring complex tax forecasting.
Next Step: Companies should closely monitor legislative developments and evaluate and reflect the financial reporting implications of legislation as enacted in each applicable jurisdiction.