Which Country Could Collect the Tax? Following the Ownership Chain

First identify the jurisdiction whose income and taxes are being tested. Then identify which jurisdiction could impose a relevant charge. A domestic minimum top-up tax, an Income Inclusion Rule and an Undertaxed Profits Rule perform different roles. They should not be treated as three interchangeable names for a single tax paid by the same entity.

Build a simple table with the tested jurisdiction, possible collecting rule, potentially liable entity and relevant fiscal period. Add a column for the basis of any relief. This separates the economic location of the profits from the legal responsibility for a charge. It also gives each local adviser a precise question rather than asking whether the whole group is “covered by Pillar Two”.

Under the coordinated framework, a qualifying domestic minimum top-up tax generally has the first opportunity to collect tax on local low-taxed profits. The IIR then operates through the relevant parent chain, with the UTPR acting as a backstop where applicable. Qualification, ownership rules, safe harbours and domestic implementation can change the detailed outcome. Check them for the period being considered.

Imagine a fictional parent in Country A, an intermediate holding company in Country B and a manufacturing entity in Country C. If C has an applicable qualified domestic tax, do not immediately allocate the entire exposure to A. If an IIR may apply through B, investigate that layer too. The useful first answer is a rule-order diagram showing what must be confirmed before assigning an amount or payer.

A safe-harbour conclusion must identify the rule and period it covers. The 2026 Side-by-Side package does not remove the primacy of qualified domestic minimum top-up taxes. Avoid turning a statement about relief from one collecting rule into a statement that the group has no obligations anywhere. Retain the evidence supporting recognition, eligibility and the period of application.

Keep tax allocation, legal liability and internal funding separate in the working paper. Headquarters may agree commercially to reimburse a subsidiary, but that arrangement does not by itself determine which entity owes the authority. Ask treasury how any expected payment will be funded and ask local advisers to confirm who receives notices, makes elections and deals with assessments.

Escalate when advisers in different locations assume another entity will pay, when the intermediate ownership chain is incomplete, or when a group-wide relief claim has not been checked against domestic tax. Bring us the ownership chart, tested year and any existing country advice. We can help organise a coordinated review of the possible collectors, the assumptions behind the allocation and the questions each local team needs to answer.