A key part of the OECD/G20 BEPS Project is addressing the tax challenges arising from the digitalisation of the economy. In October 2021, over 135 jurisdictions joined a ground-breaking plan to update key elements of the international tax system which is no longer fit for purpose in a globalised and digitalised economy. The Global Anti-Base Erosion Rules (GloBE) are a key component of this plan and ensure large multinational enterprise pay a minimum level of tax on the income arising in each of the jurisdictions where they operate. More specifically, the GloBE Rules provide for a co-ordinated system of taxation that imposes a top-up tax on profits arising in a jurisdiction whenever the effective tax rate, determined on a jurisdictional basis, is below the minimum rate. This Commentary to the GloBE Rules provides tax administrations and taxpayers with guidance on the interpretation and application of those rules in order to promote a consistent and common interpretation of the GloBE Rules that will facilitate coordinated outcomes for both tax administrations and MNE Groups. This Commentary explains the intended outcomes under the GloBE Rules and clarifies the meaning of certain terms. It also illustrates the application of the rules to certain fact patterns.