July 3, 2025 — Trust structures have occupied a distinct position in the architecture of cross-border wealth for centuries. The trust as a legal vehicle, originating in English common law and adapted in various forms by other common-law jurisdictions, was traditionally characterised by a separation between legal and beneficial ownership that had no exact equivalent in civil-law jurisdictions. The separation provided trusts with legitimate functions — succession planning, asset protection, charitable purposes, governance of family wealth across generations — that have been integral to wealth structuring across the post-1700 history of English-speaking jurisdictions.

The same separation provided trusts with a feature that was, for much of their history, available only incidentally: a degree of opacity from outside scrutiny. The settlor's identity, the beneficiaries' identities, and the trust's terms were typically not matters of public record. The trustees, holding legal title, were the persons most visible to outside parties; the beneficiaries, holding equitable interests, were less visible and in some cases not visible at all without specific inquiry.

The opacity element of trusts has been progressively reduced over the past decade through a combination of the Common Reporting Standard, beneficial ownership register requirements, specific trust reporting frameworks, and bilateral exchange-of-information arrangements. The reduction has been gradual but cumulative. By 2025, the practical opacity of trust structures vis-à-vis tax and regulatory authorities is substantially less than at any prior point. This article reads where trust reporting now stands and what it means for trust users.

The trust as a legal vehicle

A trust is created when a settlor transfers property to a trustee to hold for the benefit of one or more beneficiaries, on the terms set out in the trust instrument. The trustee holds the legal title and has fiduciary duties to administer the trust in accordance with the instrument and applicable law. The beneficiaries have equitable interests in the trust property, with the nature and timing of those interests depending on the instrument's terms.

Trusts can be revocable or irrevocable, with revocable trusts allowing the settlor to retain control and irrevocable trusts removing the settlor's ability to alter the arrangement after creation. They can be discretionary, where the trustees have discretion in distributions, or fixed-interest, where the beneficiaries have specified entitlements. They can be testamentary, taking effect on the settlor's death, or inter vivos, taking effect during the settlor's lifetime.

The legal characteristics of the trust have implications for tax treatment that vary across jurisdictions. Common-law jurisdictions generally recognise the trust's separation between legal and beneficial ownership, with tax flowing through to beneficiaries in some configurations and accumulating at the trust level in others. Civil-law jurisdictions, lacking the trust as a domestic legal concept, have developed varying responses to foreign trusts, with some jurisdictions taxing them as transparent entities, others as opaque entities, and others as a hybrid depending on the specific trust's terms.

The pre-CRS reporting environment

The pre-2014 reporting environment for trusts was substantially less developed than the post-CRS environment. National tax authorities had bilateral exchange-of-information arrangements with limited scope, supplemented by domestic reporting requirements that varied across jurisdictions.

The principal reporting obligations applied to trusts established in or operated from specific jurisdictions, with the obligations varying according to local law. Jersey, Guernsey, the Isle of Man, the Cayman Islands, the British Virgin Islands, and similar trust jurisdictions had specific reporting frameworks that applied to trusts established under their laws. Common-law jurisdictions including the United Kingdom and the United States had reporting frameworks for domestic trusts and certain foreign trusts with US connections.

The cumulative effect was that information about trust structures was reasonably accessible to the authorities of jurisdictions where the trust was administered or where it had specific connections, but less accessible to the authorities of jurisdictions where settlors or beneficiaries were resident. A French resident who was a discretionary beneficiary of a Cayman trust was, in the pre-CRS environment, not automatically visible to the French tax authorities, though the trust's existence might be discoverable through specific inquiry.

The Common Reporting Standard impact on trusts

The Common Reporting Standard, in force from 2017, brought trusts into a more comprehensive reporting framework. The CRS treats trusts as financial institutions in some configurations and as passive non-financial entities in others, with the treatment depending on the trust's investment activities and management structure.

A trust treated as a financial institution under CRS — broadly, a trust whose primary income is from investment activity managed by a financial institution — is required to report financial account information about its account holders, which includes the beneficiaries. The reporting flows to the tax authority of the jurisdiction where the trust is administered, which exchanges with the tax authorities of the beneficiaries' residence jurisdictions.

A trust treated as a passive non-financial entity is subject to a different but parallel reporting regime, in which the financial institution holding the trust's accounts must identify and report the controlling persons of the trust. The controlling persons typically include the settlor, the trustees, the protector if any, and the beneficiaries.

The CRS treatment has significantly reduced the practical opacity of trusts that hold financial assets. The trust's settlor and beneficiaries are now, in most cases, identified and reported to their residence-state tax authorities through one or another CRS pathway. The historical assumption that trust structures provided opacity for the persons behind them has been substantially revised.

The dedicated trust registers

Beyond CRS, several jurisdictions have implemented dedicated trust registers as part of their broader beneficial ownership transparency frameworks.

The European Union's Fifth Anti-Money Laundering Directive required Member States to establish trust registers, accessible to relevant authorities and, in some implementations, to persons with legitimate interest. The trust register implementations have varied across Member States but have produced, in aggregate, a substantial increase in the documentation of European trust structures.

The United Kingdom's Trust Registration Service, established in 2017 and substantially expanded in 2022, requires the registration of UK trusts and certain non-UK trusts with UK connections. The expanded scope captures trusts that hold UK assets or have UK-resident beneficiaries, with the consequence that a much wider range of trusts is now within the UK registration framework than was previously the case.

The United States has historically operated reporting requirements for foreign trusts with US connections, principally through the Form 3520 and Form 3520-A framework. The framework has been refined through subsequent legislative and administrative action, and the post-2024 implementation of the Corporate Transparency Act has added an additional reporting layer for certain trust-owned entities.

The cumulative effect is that trusts in the major OECD jurisdictions now operate within multiple overlapping reporting frameworks. A typical cross-border trust structure may be reportable under CRS, under the relevant trust register, under FATCA if there are US connections, and under the beneficial ownership register of the trustees' jurisdiction. The aggregate documentation of the structure is substantially more comprehensive than the pre-2014 baseline.

The civil-law jurisdiction response

Civil-law jurisdictions, lacking the trust as a domestic legal concept, have developed varying responses to the increased visibility of foreign trust structures.

The French response has been particularly developed. The trust reporting framework introduced in 2011 and refined through subsequent reforms requires settlors, trustees, and beneficiaries with French connections to report extensive information about foreign trusts. The framework is administered by the DGFiP and produces detailed information that is integrated with broader tax compliance.

The Italian response has incorporated trust reporting into the broader RW reporting framework, which captures Italian residents' foreign assets and income. Trusts in which Italian residents have settlor, beneficiary, or protector roles are within the framework's scope.

The Spanish response has developed through the Modelo 720 reporting framework, which requires Spanish residents to report certain foreign assets and structures. Trusts are captured to the extent that Spanish residents have qualifying connections. The Spanish framework was substantially modified in 2022 and 2023 following the Court of Justice of the European Union's decision in case C-788/19 (Commission v Spain, 27 January 2022), which held that the disproportionate penalty regime under the original Modelo 720 framework was incompatible with the free movement of capital under EU law. The post-judgment reform retained the reporting obligation but recalibrated the penalty regime to comply with the proportionality requirements identified by the Court, with the reformed framework now operating within ordinary general tax penalty provisions rather than the special punitive regime that the original framework had imposed.

The German response has been less codified than the French, Italian, and Spanish responses but has produced administrative practice on the German tax treatment of foreign trusts that has clarified the reporting and tax obligations of German-connected persons.

The implications for trust users

For users of trust structures — settlors, beneficiaries, protectors, family members of these persons — the cumulative effect of the reporting framework has been to substantially increase the visibility of trust structures to tax authorities and to substantially increase the compliance burden of operating them.

The first implication is the elimination of opacity as a structural feature. Trust structures continue to provide legitimate functions — succession planning, asset protection, charitable purposes, governance — but they no longer provide opacity from tax authorities of the settlors' or beneficiaries' residence jurisdictions. The functional value of the trust must be justifiable on grounds other than opacity.

The second implication is the expanded compliance burden. Trust structures must comply with reporting requirements in multiple jurisdictions, with each jurisdiction having its own forms, deadlines, and verification procedures. The compliance work must be performed by the trustees with input from the settlors and beneficiaries, and the cost has increased substantially over the past decade.

The third implication is the increased importance of substantive trust administration. With the trust's existence and structure visible to tax authorities, the administration of the trust must be substantively defensible. Trustees who hold legal title without exercising genuine fiduciary discretion may face challenges to the trust's effectiveness for tax purposes. The administration must demonstrate that the trustees are genuinely fulfilling their fiduciary duties rather than acting as administrative agents of the settlors or beneficiaries.

The fourth implication is the potential for differential outcomes across jurisdictions. The tax treatment of trusts varies across the relevant jurisdictions, and a trust that is tax-effective in one configuration may be tax-effective in different configurations under different jurisdictions' rules. Trust users must consider the tax implications across all jurisdictions where the trust has connections, with each jurisdiction's framework potentially producing different results.

The competing view: trust opacity was overstated

An alternative view, held by some commentators, is that the historical opacity of trusts was overstated, and that the post-CRS reporting framework has principally formalised reporting obligations that already existed under domestic law. The argument is that residence-state tax authorities had, even before CRS, the legal authority to require disclosure of trust connections from their resident taxpayers, and that the framework has improved enforcement of pre-existing obligations rather than creating fundamentally new ones.

The argument has merit at the level of legal obligation. Most jurisdictions have, for decades, required residents to disclose foreign trust connections in their tax returns or in specific reporting forms. The pre-CRS gap was principally enforcement: in the absence of independent verification, residence-state authorities had to rely on resident self-reporting, which was incomplete in many cases.

The post-CRS framework has filled the enforcement gap. The information that residents were already required to provide is now independently verifiable through automatic exchange. The substantive change has been less about new obligations and more about effective enforcement of existing ones.

The counterview is that, in practical terms, the difference between unenforced obligations and enforced obligations is large. The pre-CRS environment allowed many trust structures to operate outside the formal compliance framework with limited risk of detection. The post-CRS environment has substantially closed this margin. Whether the framework has created new obligations or enforced existing ones, the practical effect on trust users has been substantial.

Forward-looking observations

The trajectory of trust reporting through the second half of the 2020s is one of continued tightening rather than fundamental change. The CRS framework will continue to capture trusts as financial institutions or as passive non-financial entities. The European trust registers will continue to operate, with the November 2022 ECJ ruling having moderated public access but not affected access by relevant authorities. The United Kingdom's expanded TRS will continue to capture an expanding range of trusts. The US framework will continue under FATCA, the CTA, and the existing trust reporting forms.

The integration of these frameworks will continue to develop. Bilateral exchange agreements will be updated to reflect the new information landscape. National tax authorities will continue to refine their analytical use of the data. The cumulative picture of cross-border trust activity that authorities have access to will continue to expand.

For trust users, the practical implication is that trusts must be operated as fully compliant structures with no reliance on opacity for any of their functions. The legitimate functions of trusts — succession planning, governance, asset protection in jurisdictions where this is legally available, charitable purposes — remain available. The opacity function has been substantially eliminated, and trust structures must justify themselves on the legitimate functions alone. The advisory function on trust structures has shifted accordingly: the focus is increasingly on substantive design choices that operate within full transparency rather than on structures that depend on limited disclosure for their effectiveness.