The world has never been more globally connected, and for wealthy Americans the Atlantic feels smaller than ever. Americans are increasingly looking to the UK as somewhere they can build or develop their career, diversify a portfolio, or give children an international education. But as Americans become more mobile, understanding the implications of a potential move has become a critical part of responsible wealth planning. 

The decision to live, work, or invest abroad is no longer just about lifestyle. It’s about navigating increasingly complex, interlocking tax regimes that shape how income and capital are treated over a lifetime. The abolition of the UK’s long-standing non-domicile regime in April 2025, and the introduction of the new four-year Foreign Income and Gains regime, mark a clear shift toward residence-based rules that reach from annual income through to multigenerational inheritance. 

For Americans, this change arrives alongside a constant: the United States continues to tax worldwide income by citizenship, creating one of the most intricate cross-border intersections in global tax. When US citizenship-based taxation meets UK residence-based taxation, with the US–UK tax treaty as a coordinating framework, both opportunity and risk are amplified. The sequence of moves, the timing of realisations and the architecture of portfolios all begin to matter more than ever. 

This white paper from The Luxury Collective UK, in collaboration with Schroders, has been developed to help bridge those two worlds for sophisticated US families. American wealth in the UK aims to explain how to structure assets, plan residency and use or live with the Foreign Income and Gains (FIG) regime while remaining compliant in both systems. Whether a client remains US-based with money managed from London, spends a period of time in the UK or chooses to settle and pursue dual citizenship, the goal is to turn mobility into an informed, durable advantage rather than a source of avoidable complexity.