Executive focus: the 15% global minimum-tax framework, the IAS 12 temporary deferred-tax exception, current-tax recognition, disclosure, data ownership and close controls.
Why Pillar Two belongs inside the close calendar
The OECD Pillar Two model rules introduced a global minimum-tax architecture intended to ensure that large multinational groups face an effective tax rate of at least 15% in each relevant jurisdiction, subject to the detailed GloBE rules. For finance teams, the important point is operational: tax exposure can no longer be treated solely as an annual return prepared after the financial statements are substantially complete.
Local accounting profit, covered taxes, deferred-tax information, entity classifications, ownership data and elections can all influence the calculation. The estimated top-up tax may therefore affect the period-end tax provision and management forecast. A group that starts its Pillar Two work only after consolidation will struggle to produce a controlled current-tax number and a convincing audit trail.
What IAS 12 changed
In May 2023 the IASB amended IAS 12 in response to the Pillar Two model rules. The amendments introduced a mandatory temporary exception from recognising and disclosing information about deferred-tax assets and liabilities related to Pillar Two income taxes. The objective was to avoid inconsistent deferred-tax accounting while jurisdictions were implementing a complex new tax system.
The exception does not mean Pillar Two is ignored in the financial statements. Entities still need to account for current tax arising from enacted or substantively enacted Pillar Two legislation when the relevant liability exists under IAS 12. They also need to provide targeted disclosures and state that the temporary exception has been applied. Finance policies should clearly distinguish the deferred-tax exception from current-tax accounting.
Current tax needs a controlled estimate
Once Pillar Two legislation is effective in a jurisdiction, the group needs a process to determine whether top-up tax is payable and which entity bears the liability under local law. That analysis may involve safe harbours, effective-tax-rate calculations, substance-based income exclusions and allocation rules. The accounting entry is the end of the process, not the process itself.
A robust close control reconciles source data to the consolidation system, documents the version of the tax rules and elections used, identifies manual adjustments and records review evidence. Because Pillar Two calculations can contain data from HR, fixed assets, tax and legal-entity systems, a single spreadsheet owner is rarely enough. A RACI across Tax, Group Accounting, local Finance and IT reduces key-person risk.
Disclosure should explain exposure, not overwhelm the reader
Targeted IAS 12 disclosures are designed to help users understand an entity's exposure to Pillar Two income taxes, particularly during implementation. The most useful narrative explains where material exposure may arise, what information is known or reasonably estimable and where uncertainty remains.
Boilerplate language such as “the group is assessing the impact” quickly loses value once legislation is effective and calculations are available. A better disclosure links the status of implementation to material jurisdictions and explains why a precise number may still be uncertain. The disclosure process should be tied to the same controlled dataset used for the tax provision, so narrative and accounting numbers cannot drift apart.
Safe harbours are not a reason to abandon data quality
Transitional or permanent safe-harbour mechanisms can reduce computational burden in qualifying cases. Yet they create their own evidence requirements. The group must be able to show that the conditions were met using the prescribed data and period. A safe harbour is therefore a rule-based conclusion, not a shortcut around governance.
Finance should retain the source trial balance, qualifying financial statements, country-by-country reporting data where relevant, mapping logic and sign-offs. If a jurisdiction falls out of a safe harbour in a later year, the group will need a stronger GloBE dataset. Building data lineage during the relief period prevents a much larger implementation problem later.
Forecasting: accounting and cash tax can diverge
Pillar Two introduces a new layer to tax forecasting. The accounting tax expense for a quarter, the legal payment date of top-up tax and the cash consequences for entities can occur on different timelines. FP&A should therefore avoid treating the estimated tax expense as an immediate cash outflow.
A useful model separates booked current tax, expected top-up tax, payment timing and uncertainty. It also identifies which drivers move the exposure: profit mix by jurisdiction, covered taxes, tax incentives, payroll and tangible assets. This makes the forecast useful for decisions rather than a black-box percentage added to the effective tax rate.
Materiality and ownership of the journal entry
Pillar Two calculations can generate many jurisdiction-level amounts, but the financial statements still apply materiality. The group should define how immaterial exposures are aggregated, which thresholds trigger detailed review and how local estimates roll into the consolidated tax provision. Materiality should not be used to bypass a calculation that is needed to determine whether the total exposure is material.
Ownership of the final journal entry also needs clarity. Tax may produce the technical calculation, while Group Accounting owns the consolidated financial statements. A documented hand-off—calculation prepared, tax-reviewed, accounting-reconciled and controller-approved—creates a stronger audit trail than an unexplained top-side entry posted late in the close.
A close-ready control framework
- Define the in-scope group and ownership chain.
- Map GloBE data fields to authoritative source systems.
- Separate current-tax accounting from the IAS 12 deferred-tax exception.
- Document safe-harbour conclusions and retained evidence.
- Reconcile top-up-tax estimates to the tax provision and management forecast.
- Use the same controlled dataset for disclosures and journal entries.
- Maintain a regulatory-change log for jurisdictional implementation and elections.