Managing Wealth Across Multiple Jurisdictions: A Practical Guide

Thirty years ago, owning assets in more than one country was the preserve of the ultra-wealthy. Today, it is routine for senior professionals, entrepreneurs, and families with an international footprint to hold UK property, a UAE brokerage account, a pension from a previous jurisdiction, foreign currency deposits, and perhaps an investment in a private company — all simultaneously, all subject to different rules.

The complexity compounds with each additional jurisdiction. Tax reporting obligations multiply. Currency exposures interact. Regulatory protections differ. And the advisers who understand one country's rules are rarely expert in another's. Managing this well requires structure, coordination, and — above all — a clear view of the whole picture.

The Core Challenge: No One Has Oversight of the Whole

The fundamental problem with multi-jurisdiction wealth is fragmentation. A UK tax adviser may be expert in UK capital gains tax but know little about how Thai property gains are treated. A UAE-based wealth manager may understand local regulations but not how their client's UK pension interacts with their overall position. A Swiss private bank may hold custody of European equities without visibility of the client's offshore bond sitting in Dublin.

The result is that decisions are made in silos. An asset is sold at a time that optimises one jurisdiction's tax position without regard to another. Currency is held in the wrong location. Estate planning documents are drafted for one legal system but conflict with the succession laws of another.

Building a coherent picture is the starting point for any serious multi-jurisdiction strategy.

Step One: Consolidated Reporting

Before you can plan anything, you need visibility. Consolidated reporting — a single view of all assets, liabilities, income, and currency exposure regardless of where they are held — is the foundation.

For most individuals, this means either:

• A multi-custody platform that aggregates positions across custodians and jurisdictions into a single reporting view. Several international private banks and specialist platforms offer this
• Manual aggregation through a wealth management firm or family office that compiles positions across custodians into a unified report
• Software-based aggregation using tools such as Addepar, Masttro, or similar platforms that pull data from multiple custodians via feeds

The report should capture not just market values but also the tax lot information (cost basis, acquisition date, holding currency) that will be needed when positions are eventually disposed of.

Regulatory Environments and Compliance

Each jurisdiction imposes its own regulatory and reporting requirements on residents holding offshore assets. Key obligations for internationally mobile individuals commonly include:

UK: Non-resident landlord registration, Self Assessment tax return for UK income, reporting of offshore accounts under HMRC's worldwide disclosure rules if a past non-compliance has occurred, inheritance tax filing where applicable

United States: FBAR (FinCEN 114) for foreign accounts exceeding $10,000 in aggregate, Form 8938 under FATCA for higher thresholds, PFIC reporting for non-US funds, GILTI and Subpart F for US persons owning shares in foreign corporations

CRS jurisdictions: Over 100 jurisdictions now participate in the Common Reporting Standard, meaning offshore financial institutions automatically report account information to the account holder's country of tax residence. This makes non-disclosure increasingly difficult and inadvisable

UAE: Currently no personal income tax or capital gains tax, but economic substance requirements apply to corporate structures; VAT registration applies for businesses

EU: Varies by member state; Spain, Portugal, and France each have their own reporting requirements for assets held outside the country, often with punitive penalties for non-disclosure (Spain's Modelo 720 regime, though reformed, remains relevant)

Understanding where you have reporting obligations — and ensuring you are compliant — is not optional. The consequences of non-compliance can include significant penalties, criminal prosecution in the most serious cases, and reputational damage that complicates future banking relationships.

Multi-Currency Portfolio Construction

When your assets are denominated in multiple currencies and your living expenses may be split across two or three countries, currency management becomes a wealth management question, not just a treasury function.

Key considerations:

Living expense matching: If you spend £100,000 a year in the UK and $150,000 a year in the UAE, your investment portfolio should ideally have sufficient sterling and dollar liquidity to fund those expenses without forced currency conversion at inopportune moments.

Currency of denomination vs currency of risk: A UK FTSE 100 fund denominated in sterling still has substantial exposure to global revenues. A US dollar bond fund denominated in dollars has currency exposure relative to a non-dollar spender. Denomination and underlying economic exposure are not the same thing.

Natural hedges: If you own UK property and owe a sterling mortgage, those partly offset each other as a currency position. Identifying natural hedges in your overall book reduces the need for synthetic hedging (which carries its own cost).

Rebalancing complexity: In a single-currency portfolio, rebalancing is straightforward. In a multi-currency, multi-jurisdiction portfolio, rebalancing generates potential tax events in multiple countries and requires coordination to avoid inadvertently triggering taxable disposals at the wrong time.

Coordinating Advisers Across Jurisdictions

Most internationally mobile individuals accumulate advisers piecemeal — a UK accountant here, a local lawyer there, a bank relationship in a third country. Coordination between these advisers typically does not happen unless the client orchestrates it.

Best practice is to designate one adviser or firm as the coordinating relationship — the person who maintains the whole-picture view and ensures that decisions made in one jurisdiction account for the consequences in others. This might be a multi-jurisdictional family office, an international private bank with global reach, or an independent wealth manager who takes an active coordinating role.

The coordinating adviser does not need to be an expert in every jurisdiction's tax code. Their role is to identify where cross-border issues arise, ask the right questions of local specialists, and ensure that the left hand knows what the right hand is doing.

Consolidated Custody Solutions

Beyond reporting, there is a practical question of where assets are physically held. Fragmented custody — separate accounts at a dozen institutions in six countries — creates operational risk (missed statements, forgotten accounts) and may not be optimal for any jurisdiction's regulatory purposes.

International private banks can often provide multi-currency custody under a single relationship, holding equities, bonds, and funds in multiple currencies under one client number. This simplifies administration without necessarily requiring consolidation of all assets — you might still hold direct property or pension assets outside the custody relationship.

Offshore investment bonds (typically issued from the Isle of Man or Dublin) can act as a wrapper around a diverse portfolio, consolidating custody of the underlying investments while providing tax-deferral benefits. These structures are discussed in more detail in our separate guide to offshore bonds.

Estate Planning Across Borders

Multi-jurisdiction asset ownership creates complexity in estate planning that often catches families off guard. Different countries apply different succession laws, and some (notably France, Spain, and many civil law jurisdictions) impose forced heirship rules that can override testamentary intentions.

EU Succession Regulation (Brussels IV) allows EU residents to elect for the law of their nationality to apply to their estate in EU member states — a potentially valuable tool for British nationals resident in Spain or France. Outside the EU, bilateral succession treaties vary.

The critical point is that a valid UK will does not automatically deal effectively with assets in other jurisdictions. Professional advice on each significant jurisdiction is essential, and wills in multiple jurisdictions may be required.

The Cost of Getting It Wrong

The costs of uncoordinated multi-jurisdiction wealth management are often invisible — decisions that appeared sound in isolation but were suboptimal when the whole picture is considered. Tax paid unnecessarily because a disposal was timed without regard for another jurisdiction's position. Estate plans that fail because succession laws were not properly considered. Currency losses incurred because living expense cashflow was not matched to income currency.

Investments can fall as well as rise in value. Tax rules change, sometimes with little notice. Professional advice specific to your circumstances is always advisable before making decisions across multiple jurisdictions.

How Global Investments Can Help

Global Investments specialises in advising internationally mobile individuals whose financial lives span multiple countries. We help clients build a coherent whole-picture view of their assets, identify the tax and regulatory implications of their current structure, coordinate specialist advisers across jurisdictions, and design portfolio and custody solutions that reduce complexity without sacrificing returns.

If your financial affairs span more than one country and you feel you lack a clear overview, we would welcome the opportunity to speak with you. Contact us to arrange a confidential conversation.