Pillar Two
Also: Global Minimum Tax, GloBE Rules, OECD Pillar Two, Global Anti-Base Erosion Rules, Imposition minimale mondiale, Globale Mindeststeuer, 15% minimum tax
OECD-backed rules imposing a 15% minimum effective tax rate on large multinational groups, jurisdiction by jurisdiction.
What It Is
Pillar Two is the global minimum tax framework developed by the OECD and agreed by a broad coalition of countries. It sets a 15% minimum effective tax rate on the profits of large multinational groups, calculated separately for each jurisdiction where the group operates. The rules apply to groups above a consolidated revenue threshold (the widely cited figure is EUR 750 million, the same threshold used for country-by-country reporting). If a subsidiary's profits are taxed below 15% in a given country, a top-up tax brings the total burden up to that floor.
Why it matters
Pillar Two removes much of the tax advantage of routing profits through low-tax jurisdictions. A CFO can no longer treat a subsidiary in a low-tax location as a reliable way to lift after-tax margin, because a top-up tax may claw back the difference. For senior leaders this reshapes decisions on where to book intellectual property, where to place holding companies, and how to model returns on cross-border investment. It also creates a heavy compliance and data burden: groups must gather granular financial and tax data per entity and per country, on tighter deadlines than before. A CDO or CFO who cannot produce clean, reconciled jurisdictional data will struggle to file accurately, which raises audit and penalty risk.
How it works
The rules calculate an effective tax rate for each jurisdiction by dividing covered taxes by GloBE income. Where that rate falls below 15%, a top-up tax is charged. The charge is collected through a set of interlocking mechanisms: a qualified domestic minimum top-up tax in the country itself, an income inclusion rule at the parent level, and a backstop rule if the first two do not apply. In practice, a group with operations in twenty countries runs the 15% test twenty times, then determines which entity pays any shortfall. Example: a technology group with a profitable arm in a low-tax jurisdiction runs the calculation, finds an effective rate of 9%, and owes a top-up equal to the gap up to 15%. Finance and data teams typically build a dedicated Pillar Two data pipeline drawing on the group's consolidation and ERP systems.
Frequently asked questions
What is Pillar Two in plain terms?
Pillar Two is the OECD-backed global minimum tax framework that sets a 15% minimum effective tax rate on the profits of large multinational groups. The rate is tested jurisdiction by jurisdiction, not on the group as a whole. Where profits in a country are taxed below 15%, a top-up tax brings the burden up to that floor.
Which companies fall within the scope of the rules?
Pillar Two targets large multinational groups above a consolidated revenue threshold, the widely cited figure being EUR 750 million, the same threshold used for country-by-country reporting. Smaller groups and purely domestic businesses are outside its scope. Being above the threshold means running the 15% test in every jurisdiction where the group operates.
Why does Pillar Two concern the CFO and not only the tax department?
Because it changes where profit is worth booking. A subsidiary in a low-tax location no longer reliably lifts after-tax margin, since a top-up tax can claw back the difference, which reshapes decisions on where to hold intellectual property, where to place holding companies, and how to model returns on cross-border investment.
How is the top-up tax actually calculated and collected?
The effective tax rate of each jurisdiction is obtained by dividing covered taxes by GloBE income; below 15%, a top-up tax covers the gap. Collection runs through interlocking mechanisms: a qualified domestic minimum top-up tax in the country itself, an income inclusion rule at parent level, and a backstop rule if neither applies. A group present in twenty countries runs the test twenty times, then determines which entity bears any shortfall.
What data work does Pillar Two require from finance and data teams?
Groups must collect granular financial and tax data per entity and per country, on tighter deadlines than before. In practice, finance and data teams build a dedicated Pillar Two data pipeline drawing on the group's consolidation and ERP systems. Without clean, reconciled jurisdictional data, accurate filing becomes difficult and audit and penalty risk rises.