Executives and trustees today must navigate a significantly altered cross-border tax environment. Since 2024,2026 a cluster of coordinated fiscal reforms, led by the OECD, the European Union and national authorities, has expanded automatic information exchange, strengthened anti‑money‑laundering controls and introduced a global minimum tax that directly affects multinational groups and high‑net‑worth structures.

This article explains the principal reforms that matter for cross‑border wealth, highlights practical legal and operational safeguards, and sets out an action plan trustees and company executives can implement now to reduce tax, regulatory and reputational risk in an era of intensified transparency (status as of 11 May 2026).

Understanding the global minimum tax and its implications

The OECD’s Pillar Two (Global Minimum Tax) framework and the Inclusive Framework’s recent “side‑by‑side” package have changed how top‑up taxes are allocated and reported across jurisdictions. Large multinational groups are now subject to an income inclusion rule (IIR), qualified domestic minimum top‑up taxes (QDMTTs) and undertaxed profits rules (UTPR), all of which can affect effective taxation of profits allocated to jurisdictions where family‑controlled entities or service companies operate.

In January 2026 the Inclusive Framework published administrative guidance and safe‑harbour mechanics intended to coordinate QDMTTs and other reliefs; the practical consequence for wealth structures is that top‑up liabilities may arise at either the group (IIR) level or locally where a QDMTT is in force. Trustees and executives overseeing corporate wealth should therefore reassess how passive income, licensing and holding company profits are recorded and where tax is actually paid.

EU member states and many other jurisdictions are putting domestic rules and reporting timelines in place; for example, EU legislation requires states to adopt rules and prepare for top‑up tax reporting, with first reporting deadlines to follow domestication timetables. These timelines will affect fiscal years that began in 2024,2025 and result in first top‑up filings in mid‑2026 in many territories. Trustees should map which entities in their group fall inside the Pillar Two scope and plan governance, reporting and potential payments accordingly.

Automatic exchange, crypto reporting and the modernised CRS

The Common Reporting Standard (CRS) has been amended and consolidated to broaden the scope of automatic exchange of account information; these changes, often described as CRS 2.0, include enhanced reporting fields and technical XML schema updates that affect how financial institutions collect and transmit data. The OECD and the Global Forum have published consolidated CRS texts and implementation guidance which many jurisdictions are embedding into law with reporting beginning for the 2026 reporting cycle.

At the same time the OECD’s Crypto‑Asset Reporting Framework (CARF) brings many crypto‑asset service providers into the automatic exchange regime. CARF complements the CRS by requiring reporting of crypto transactions and user identities in jurisdictions that implement the standard; the EU incorporated CARF‑aligned rules through DAC8 and member states began preparing national rules from 2026 onwards. For trustees and executives with crypto exposure, this substantially increases the probability that previously opaque crypto holdings and flows will be visible to tax authorities.

Practically, these information regimes mean financial institutions and many non‑bank service providers must collect taxpayers’ residence details, documentary evidence and transaction data with heightened accuracy. Trustees should therefore review account opening procedures, client due diligence (CDD) templates and data retention policies to ensure reporting‑grade records are produced on demand.

Stricter AML rules, beneficial‑ownership transparency and enforcement trends

The EU’s anti‑money‑laundering legislative package (including the 6th AML Directive and related regulations) tightens due diligence obligations, harmonises beneficial‑ownership registers and expands access for competent authorities and obliged entities. These reforms increase public‑sector access to ownership and control information for trusts, companies and other legal arrangements operating or investing in the EU. Trustees whose structures interact with EU counterparties must expect deeper verification and increased scrutiny.

National authorities have also strengthened enforcement and information sharing between tax and law‑enforcement agencies. The combined effect is faster identification of mismatches between declared tax positions and exchange‑of‑information records, raising the risk of inquiries, audits and asset freezes if transparency gaps are found. High‑net‑worth individuals and trustees should not assume confidentiality shields apply where a jurisdiction participates in these regimes.

Given this environment, proactive verification of beneficial owner data, robust record‑keeping for trust settlements and distributions, and formalised AML/CTF (counter‑terrorist financing) procedures within family offices are now essential to minimise escalations. Trustees should also confirm whether national registers require public access or limited access by competent authorities only, and adapt disclosure strategies accordingly.

Trust law, fiduciary duties and defensive drafting

Trustees must revisit trust instruments to ensure terms are aligned with current disclosure and reporting realities. Clauses that predate the expanded CRS/CARF/OECD landscape may lack express powers for information sharing with tax advisors, administrators and requesting authorities; updating powers of disclosure, holding company cooperation provisions and document retention clauses will reduce operational friction during audits.

Fiduciary duties remain paramount: trustees should document decision‑making, apply professional standards to distributions and investments, and obtain written legal tax opinions where outcomes are uncertain. Good governance,regular minutes, compliance attestations and independent valuations,builds a defensible record where transactions attract regulatory attention.

Where trustees rely on professional advisers, engagement letters should expressly allocate responsibilities for tax reporting, CRS/CARF data collection and AML checks. This reduces ambiguity about who must collect, verify and exchange the information that authorities will request under the new regimes.

Operational strategies to protect cross‑border wealth

Start with a documented cross‑border risk assessment that identifies which entities, trusts and individuals are in scope for Pillar Two, CRS, CARF, DAC7/DAC9 obligations and for local AML requirements. This assessment should include jurisdictional mapping (residence, source of income, location of assets), exposure to crypto‑asset service providers, and the presence of any preferential tax regimes that could attract top‑up tax attention.

Consider restructuring that prioritises substance and economic activity over purely formal arrangements. Where a trust or company is economically passive but located in a jurisdiction that will face UTPR or QDMTT consequences, practical steps such as relocating management, increasing local payroll and documenting genuine commercial reasons for the location can materially reduce disputes over artificial arrangements.

For crypto and digital assets, ensure custody models, exchange counterparties and service providers are reporting‑compliant, and centralise reporting data where possible. Implement reconciliation processes between the trustee’s ledger and third‑party reports to detect incoming information mismatches early.

Proactive compliance, disclosures and dispute preparedness

Where historic non‑compliance risks exist, trustees and executives should evaluate voluntary disclosure programmes and controlled exchanges of information with counsel before an authority initiates contact. Early, structured disclosures, supported by remediation plans and corrected filings, can reduce penalties and criminal exposure in many jurisdictions. Engage tax litigation specialists if exposure is material.

Maintain an audit‑ready file for each wealth vehicle: documented tax positions, advice letters, transfer‑pricing studies (where relevant), KYC records and evidence of economic substance. These files reduce the time and cost of responding to information requests and lower the risk of secondary enforcement measures.

Finally, implement an escalation protocol that identifies when to notify beneficial owners, when to retain external counsel, and how to coordinate communications with banks and trustees’ insurers to protect reputation and limit operational surprise.

Recommended immediate checklist for executives and trustees

1) Map in‑scope entities and assets for Pillar Two, CRS/CARF and AML exposure and document the reporting calendar for each jurisdiction.

2) Update trustee and corporate governance documents to grant clear powers for information exchange and evidence retention; refresh engagement letters with advisors to allocate data‑collection responsibilities.

3) Verify counterparties (banks, exchanges, custodians) are using updated CRS/CARF reporting schemas and confirm their reporting timelines and data formats so reconciliations can be automated where possible.

4) Review substance across holding and operating entities and implement commercially supportable changes (management, contracts, employment) where necessary to withstand transfer pricing and substance queries.

5) Prepare a compliance remediation plan for legacy non‑compliance and assess the applicability of voluntary disclosure routes in each relevant jurisdiction with specialised local counsel.

In short, combine legal review, operational remediation and careful governance to convert new transparency obligations from an unmanaged risk into a controlled compliance programme.

The coordinated wave of reforms since 2024, notably the OECD’s Pillar Two package, CRS and CARF modernisation and the EU’s AML and DAC‑family rules, has materially raised the stakes for cross‑border wealth management. Executives and trustees must therefore prioritise accurate reporting, substance, and robust trustee governance to reduce tax, regulatory and reputational exposure.

Practical, timely action, mapping exposures, updating documents, strengthening AML and KYC, and aligning with reporting counterparties, will best protect family wealth and corporate assets in a world where information flows swiftly and enforcement capacity continues to grow. If you oversee cross‑border structures, engage qualified tax and trust counsel now to implement the steps above before reporting cycles and top‑up tax filings begin in mid‑2026 and beyond.