A British entrepreneur came to us with what he described as a cash flow problem. He had a profitable manufacturing business in Germany, a property portfolio in Portugal, a family trust in Jersey, and personal tax residency in the UAE. His problem, as he explained it, was that he couldn’t efficiently move money between his structures without triggering costs he didn’t understand.
After two weeks of due diligence, we identified six separate problems. The cash flow issue was real but minor. The larger problems were a substance deficiency in his Jersey trust that the UK tax authority had already started questioning, a Portuguese holding structure that was economically incoherent after a 2024 treaty change, and a UAE residency arrangement that didn’t actually establish the tax residency he thought it did.
He’d been sitting on these problems for two years. He knew something wasn’t right. He just couldn’t name it.
This is the norm, not the exception.
Clients with complex multi-jurisdictional wealth don’t know what they don’t know. They’ve accumulated structures, advisors, and arrangements over years or decades, often without any single advisor ever seeing the full picture. When something feels wrong, they describe the symptom they can see rather than the problem underneath it.
The advisors who add the most value in this space aren’t the ones who answer the question as asked. They’re the ones who understand what the question is actually about.
The Conversation That Doesn’t Happen
The first barrier to identifying cross-border problems is the client’s own reluctance to expose the full picture.
Wealthy individuals with complex international arrangements have usually received inconsistent advice about how much to disclose to any given advisor. Some have been told to compartmentalize — their UK advisor knows about UK assets, their Maltese advisor knows about the Malta structure, and no one has the complete view. Others have structures that were aggressive at inception and have never been reviewed since the regulatory environment shifted.
When a client walks in and describes “a tax planning question,” they’re often testing whether you’re the kind of advisor who can handle what’s actually going on. The question is a toe in the water. If you answer it narrowly, you’ll get a narrow answer back. If you respond with the right follow-up questions, you’ll start to see the real architecture.
The follow-up questions that open the conversation: How long has this structure been in place? Who set it up, and when was it last reviewed? Where do you file tax returns, and in how many jurisdictions? Do your structures have their own bank accounts and local directors, or is everything managed from one place?
These questions aren’t intrusive if framed correctly. The framing is: we can only give you useful advice if we understand the full picture. Problems in international structuring almost always live at the intersections between structures, not within any single one. If we only see part of the map, we’ll miss the problem.
The Five Problems That Hide in Plain Sight
After working through hundreds of cross-border wealth situations, the problems that are underdiagnosed consistently fall into five categories.
Substance deficiencies in intermediary structures. The OECD BEPS framework and the EU Anti-Tax Avoidance Directives have fundamentally changed what it means for a structure to be defensible. A holding company, trust, or foundation that exists primarily as a tax planning vehicle — without genuine economic substance in its jurisdiction — is now exposed in ways it wasn’t ten years ago.
The problem is that most clients who have these structures set them up when the rules were different, and their advisors haven’t done systematic reviews as the rules changed. A Maltese holding company established in 2012 with two passive directors and no employees may have been entirely defensible then. Today, it’s a substance argument waiting to be had with a tax authority.
We review substance requirements as the first step on any engagement involving intermediary holding structures. The analysis covers: where management and control actually sits, whether the directors have sufficient local knowledge and authority, whether the company has genuine local operations or just a registered address, and whether the paper trail supports the legal form.
The remediation options depend on how far off the client’s current position is. Sometimes it’s adding a genuine local director with substantive decision-making authority. Sometimes it’s restructuring the economic reality to match the legal form. Sometimes it’s an orderly wind-down of a structure that can no longer be defended.
Treaty position mismatches after jurisdiction changes. Double tax treaty networks are not static. The OECD has pushed through significant changes via the Multilateral Instrument, and bilateral treaty positions shift over time. A structure that relied on a specific treaty provision for its tax efficiency may have lost that basis without anyone noticing.
We see this most often with clients who moved their tax residency several years ago and haven’t rechecked their treaty positions since. The Portugal example from our introduction is representative: the Portugal-UK treaty underwent significant changes affecting the tax treatment of UK pension income received by Portuguese residents, and clients who didn’t review their position in 2024 may be significantly underpaying or overpaying Portuguese tax — both of which create problems.
The broader issue is that most clients don’t have anyone whose job it is to monitor treaty changes in their relevant jurisdictions. Their accountant knows their home jurisdiction. Their offshore advisor knows the offshore jurisdiction. Nobody has visibility across the full treaty network, and nobody is tracking changes.
Beneficial ownership transparency failures. The regulatory environment around beneficial ownership disclosure has changed more dramatically in the past five years than in the previous three decades. Clients who structured for privacy in an era when privacy was achievable are now exposed to a reporting environment that makes those structures visible.
The problem isn’t usually intentional non-compliance. It’s that no one told the client that a structure they set up in 2015 now has disclosure obligations they weren’t aware of. A UK trust with overseas beneficiaries may have obligations under FATCA, CRS, and UK trust registration requirements simultaneously, with different deadlines, thresholds, and penalties for non-compliance.
We always ask clients directly: what’s been reported, to whom, and when? And we verify their answer against what they should have reported based on their structure. The gap between these two answers is often alarming. Not because clients are evasive — because they genuinely didn’t know.
Succession planning that doesn’t actually work. Wealthy families spend considerable effort creating succession structures — wills, trusts, family foundations, shareholder agreements — that look comprehensive on paper but contain fatal flaws that only surface when they’re actually needed.
The most common failure: the succession documents were drafted in one jurisdiction, the assets sit in multiple jurisdictions, and the legal validity of the documents hasn’t been confirmed in each relevant jurisdiction. A UK will that effectively transfers UK assets may do nothing for the Portuguese property or the Jersey trust, which operate under entirely different legal systems.
The second most common failure: the governance documents (trust deeds, foundation charters, shareholder agreements) contain mechanisms that made sense at the time of drafting but no longer reflect the family’s actual situation. Beneficiary definitions that exclude new family members, trustee appointment provisions that name people who’ve died, protector arrangements that depend on relationships that no longer exist.
We insist on reviewing the actual documents — not summaries — in every succession planning engagement. The summaries advisors produce are optimistic. The documents contain the limitations.
Banking relationships that aren’t actually secure. Private banking relationships feel permanent until they’re not. Banks have dramatically tightened their appetite for complex multi-jurisdictional clients in the post-FATCA environment, and clients who thought they had stable relationships have found accounts closed or frozen with minimal notice.
The clients most at risk are those with structures across jurisdictions that the bank’s compliance team has decided to exit — often not because of any specific problem with the client, but because the bank has decided to stop servicing certain jurisdictions or structure types entirely. This happened systematically with Swiss private banks in 2014-2016 and is happening again with various platforms exiting Southeast Asian markets.
The question we ask every new client: when did you last speak to your banker about their appetite for your structure, and what did they say? The clients who don’t know the answer are the ones who will be surprised.
The Advisor Blind Spot That Creates Gaps
The structural problem in cross-border wealth management is the fragmentation of advice. Clients have multiple advisors, each with visibility into their own piece, and no one with accountability for the whole.
This isn’t laziness or incompetence on anyone’s part. It’s the natural result of how advisory relationships form. The client meets a tax advisor in their home country. They meet an offshore lawyer when they set up a structure. They meet a wealth manager when they have investable assets. Each advisor does their job well within their scope.
The intersections fall through the gaps.
What nobody is explicitly managing: whether the structures actually work together the way the client assumes they do, whether changes in one jurisdiction affect the tax treatment in another, whether the overall picture makes sense from a substance and compliance perspective, and whether the banking and operational infrastructure can actually support the legal architecture.
The advisors who perform this integrating function are rare and valuable. They’re not generalists — they understand each component deeply. But they also know enough about what they don’t know to bring in the right specialists at the right moment.
How We Approach the Diagnosis
When a client comes to us with a described problem, we don’t start solving the problem they’ve described. We start mapping the actual architecture.
The diagnostic we run covers four areas.
Legal form versus economic reality. We map every entity the client controls or benefits from: companies, trusts, foundations, LLPs, partnerships. For each one, we determine where management and control actually sits (which often differs from where it’s supposed to sit legally), who the beneficial owners are for reporting purposes, and what the economic substance looks like in practice.
Tax position across all jurisdictions. Where is the client filing? What are they paying? Where are they not filing that they may have obligations? We often find that clients are over-paying in one jurisdiction and under-filing in another simultaneously, because no one has mapped the full position.
Document review. Trust deeds, foundation charters, shareholder agreements, wills, banking mandates. We read the actual documents, not summaries. The gaps and inconsistencies are almost always in the documents, not in the client’s description of them.
Banking and operational infrastructure. Who actually controls the bank accounts? Are the mandates current? What happens to the accounts if the current signatory dies or becomes incapacitated? How does money actually move between structures, and is that movement consistent with the legal and tax position?
The output is a map of the actual situation, not the theoretical one. From there, we can identify the specific problems and sequence remediation in a way that doesn’t create new problems while fixing existing ones.
The Cost of Waiting
The regulatory environment for cross-border wealth management will not get simpler. The CRS network now covers 100+ jurisdictions. Beneficial ownership registers are expanding across the EU and beyond. Substance requirements are tightening rather than relaxing. The window for addressing structural problems quietly and with maximum optionality closes a little more each year.
Clients who address problems proactively, before a tax authority inquiry or a banking relationship termination, have substantially more options. Voluntary disclosure regimes exist in most jurisdictions and typically offer significantly better outcomes than discovered non-compliance. Structural remediation is far easier when done in advance of an asset sale or succession event than during one.
The conversation most wealthy clients need to have — a full review of their multi-jurisdictional position with an advisor who can see the complete picture — rarely happens until something goes wrong. The advisors who initiate that conversation proactively, before there’s a crisis, are the ones who end up with the deepest and most trusted client relationships.
The question isn’t whether there’s a problem in a complex cross-border structure. There almost always is. The question is whether you find it before it finds you.