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The Side-by-Side Agreement Reshapes US Canadian Subsidiaries’ Tax
October 8, 2021, marked the beginning of the Pillar Two era, when 137 countries (known as the Inclusive Framework and led by the OECD) signed a political agreement to domestically legislate a 15% minimum tax on all profits of multinationals that annually have at least €750 million of gross revenue. On January 5, 2026, the IF (now up to around 150 countries) signed another political agreement (the side-by-side (Sbs) agreement) that should serve to dissolve US objections that had been holding up full international adoption of Pillar Two. This article focuses on how the Sbs agreement affects US multinationals with Canadian subsidiaries.