The international tax landscape has been reshaped in recent years by the OECD/G20 two‑pillar initiative, new EU measures and parallel domestic implementations. Multinational groups and wealthy non‑resident individuals face new reporting, minimum tax and substance expectations that directly affect how cross‑border structures are organized and scrutinized by tax administrations.

Preparing for and executing a cross‑border restructuring today therefore requires an evidence‑based, compliance‑first approach: mapping exposures, aligning substance to commercial reality, documenting transfer pricing and intercompany policies, and building robust governance and controls to stay audit‑ready under the new international rules.

Map your group’s legal and tax footprint

Begin with a comprehensive map of legal entities, permanent establishments, fiscal residencies, and treaty positions across the group. This inventory should record legal form, ownership, functional roles, tax residency, applicable tax regimes and any special regimes (IP boxes, investment funds, holding regimes) that may attract scrutiny.

Quantify the economic scale and profit allocation for each jurisdiction: revenues, operating profit, taxable bases, payroll and tangible assets. That quantitative layer is essential to assess where pillar‑two top‑up taxes, undertaxed payments rules or local minimum top‑up taxes may apply and to prioritise follow‑up actions.

Use the footprint to produce a risk heat map: jurisdictions with low effective tax rates, mismatches between legal form and activities, or thin documentation should be escalated for remediation as part of any cross‑border restructuring plan.

Align substance with the declared business model

Under recent international rules, tax administrations increasingly test whether an entity’s legal form matches its economic reality. Substance indicators include qualified personnel, managerial decision‑making in‑country, physical premises, and budgets and accounting that reflect local operations.

Where structures were previously driven by tax rate differentials alone, consider relocating decision‑makers, operations or key functions to the jurisdictions that best reflect the group’s commercial activities. Document the commercial drivers, board minutes and contracts that explain why activities are placed where they are.

Substance alignment reduces the risk of successful adjustments, treaty‑based challenges and reputational exposure. Where relocation is not commercially viable, consider redesigning contractual relationships, expanding in‑country capability or accepting a controlled‑entity carve‑up and documenting the reasons and timelines for change.

Review and redesign intercompany agreements and transfer pricing documentation

Rewriting intercompany agreements is rarely cosmetic: contracts must reflect actual risk allocation, pricing mechanisms and the operational chain. Ensure that cost‑sharing agreements, service level agreements, licensing and financing documents are contemporaneous, commercially justified and consistent with accounting and tax filings.

Maintain or update the master file, local file and contemporaneous evidence required by BEPS‑era guidance and by jurisdictions that have expanded documentation obligations. Transfer pricing policies should reconcile applied methods with actual results and include functional analyses, comparability adjustments and benchmarking where relevant.

Consider seeking advance pricing agreements (APAs) or competent‑authority engagement for high‑risk transactions. APAs can provide certainty and a documented contemporaneous basis for intercompany pricing that will aid audit defence during and after a restructuring.

Consolidate, simplify and, where appropriate, decentralize entity structures

A key practical step is to remove redundant entities, merge low‑activity vehicles into operating entities, and eliminate formal steps that create artificial profit allocation points. Simplification reduces compliance burden and the surface area for audit queries.

At the same time, decentralization of certain functions (e.g., treasury, IP management, or sales support) to operational jurisdictions can strengthen substance and make the business case for tax positions more robust. Any consolidation or decentralization must be supported by operational plans, budgets, staff moves and amended contracts.

Document each restructuring step with legal opinions, board resolutions and transitional service agreements. Tax administrations commonly request documentary trails that show the commercial rationale and timelines for structural changes; absence of such records often leads to adverse inferences.

Strengthen tax governance, controls and audit readiness

Implement a documented tax governance framework with clear roles and escalation paths: who approves reorganisations, who signs intercompany agreements, and how transfer pricing policies are reviewed and tested. Embed tax review in project‑approval gates for M&A and reorganisations.

Establish a centralised compliance calendar that captures filing deadlines introduced under new rules (for example, top‑up tax reporting and enhanced information exchange in certain jurisdictions). For EU‑affiliated groups, be especially mindful of reporting and cooperation rules tied to the Pillar 2 transposition and related EU directives.

Prepare an audit pack template: executive summary of the restructure, legal and commercial rationale, accounting and tax computations, intercompany agreements, transfer pricing analyses, board minutes and local statutory filings. Having a standardised, downloadable audit pack materially shortens response times and helps preserve positions during scrutiny.

Use technology and continuous monitoring to maintain compliance

Leverage tax‑technology tools to centralise entity data, automate country‑by‑country and top‑up tax calculations, and monitor effective tax rates across jurisdictions. Automation reduces mechanical errors and produces consistent evidence for audits and competent‑authority reviews.

Deploy analytics to detect mismatches (e.g., significant profits with little payroll or assets), to monitor trends in ETRs and to flag entities approaching thresholds that trigger documentation or reporting obligations. Continuous monitoring enables faster remediation and supports real‑time decision‑making during restructurings.

Combine tech capability with periodic internal reviews and external assurance: routine internal audits of tax controls and, where material, external attestation on key processes enhance credibility with tax authorities and reduce the likelihood of contentious adjustments.

Practical cross‑border restructuring under the new international rules is not a one‑off legal exercise but an integrated programme covering commercial, tax, accounting and governance dimensions. Early mapping, clear commercial rationales and contemporaneous documentation are the most effective mitigants against tax adjustments and penalties.

Where uncertainty remains, seek specialist tax counsel and consider proactive engagement with tax authorities through rulings, APAs or competent‑authority discussions. A well documented, transparent approach not only lowers audit risk but preserves value and strategic flexibility for the group.