From static to strategic: why Pillar Two demands a real-time risk mindset

Pillar Two marks a shift in global tax compliance, from retrospective annual reporting to real-time exposure management. For in-house tax teams, this means evolving from compliance executors to strategic risk managers. The tools are changing. So is the mindset.

Annual reporting is no longer enough

Traditional tax compliance follows a predictable cycle: prepare the return, file on time, address any queries post-period. But Pillar Two upends this structure. Tax leaders must now monitor group effective tax rates across multiple jurisdictions throughout the year, anticipating risks before they trigger top-up taxes.

Ross Robertson (BDO LLP) summed up the stakes in a recent Tolley webinar:

“If you break the safe harbour in year one, you can’t rely on it in years two or three for that jurisdiction. One missed risk, and you’re locked into full compliance.”

That reality makes annual reporting a risky lag indicator. In-house teams need live indicators instead.

Real-time tax risk monitoring: what it requires

To shift from static to strategic, your function must:

• Track jurisdiction by jurisdiction data throughout the financial year
• Monitor restructuring, balance sheet changes and deferred tax adjustments in real time
• Pre-model ETR implications of transactions and events
• Flag data or governance gaps before filing periods

Safe harbour qualification is no longer just a compliance matter. It’s a dynamic, ongoing risk variable that must be preserved through careful planning.

Key events that need proactive risk input

• Internal reorganisations or debt waivers
• Large share-based compensation plans
• Entry into low-tax or incentive-heavy jurisdictions
• One-off gains or impairment reversals
• New investment structures, joint ventures or fund vehicles

Each of these could shift your jurisdictional ETR, pushing you above or below the Pillar Two threshold without any immediate visibility.

“Pillar Two determinations are a completely different playbook from corporate income tax. In-house teams must evolve their processes to manage that.” – Ross Robertson, BDO LLP

Build a tax control framework, not just a calendar

The GloBE rules introduce new audit risk and reputational pressure. Transactions that may have seemed tax-neutral historically now need forward-looking assessment.

To stay in control, leading in-house teams are:

• Developing early warning dashboards across high-risk jurisdictions
• Coordinating with treasury and legal to review tax impact of M&A and financing events
• Establishing tax “watchlists” for upcoming triggers (for example, equity vesting, restructuring plans)
• Training business units to flag potential Pillar Two events proactively

EY and KPMG both warn that operational impact, not technical complexity, is the bigger threat under Pillar Two. The risk is not knowing where exposure could arise until it's too late.

Make strategic tax part of the business rhythm

To succeed under Pillar Two, tax needs earlier access to data and broader awareness within the business. Static compliance roles must evolve into dynamic risk advisory ones. That means moving closer to group strategy, restructuring and forecasting.

Explore how Tolley+ helps you monitor global risk in real time.

Watch the full webinar here