The economics of international wealth planning in the UK now depend on a different set of variables. Where an individual lives, how long they remain there, when foreign gains are realized and how global assets are structured can matter more than the domicile concepts that shaped planning under the former system.
The UK non-dom tax reform therefore represents more than the removal of a familiar tax label. From 6 April 2025, the UK replaced its previous domicile-based remittance-basis framework with a residence-based system. For qualifying new residents, a four-year Foreign Income and Gains (FIG) regime provides temporary relief on eligible foreign income and gains, while a separate residence-based approach now determines the scope of Inheritance Tax for long-term UK residents.
For internationally mobile families, entrepreneurs, investors and executives, the result is a more time-sensitive wealth-planning environment.
The End of the UK Non-Dom Regime Changed More Than a Tax Status
Before April 2025, the UK tax system gave significant importance to domicile and, for eligible non-domiciled individuals, the remittance basis. Broadly, the remittance basis could allow qualifying individuals to limit UK taxation on certain foreign income and gains that were not brought into the UK, subject to the rules and associated consequences.
That framework has now ended. HMRC states that from 6 April 2025, the remittance basis was abolished and domicile ceased to be the relevant connecting factor for this part of the personal tax system. UK residents are generally taxed on the arising basis on worldwide income and gains, subject to specific reliefs such as the new FIG regime.
This distinction matters because non-dom remains useful shorthand for describing the population and wealth structures associated with the former system, but it is no longer a current personal tax status that automatically delivers the benefits once associated with the remittance basis.
The reform also separates tax residence from citizenship, nationality and domicile. A person’s passport does not, by itself, determine whether they are UK tax resident.
How the New Four-Year FIG Regime Works
The new Foreign Income and Gains regime is designed for qualifying new UK residents rather than as a permanent replacement for the former remittance basis.
HMRC’s 2026 guidance states that an individual can qualify where the relevant tax year falls within their first four years of UK residence following at least 10 consecutive tax years of non-UK residence. A claim can provide relief on qualifying foreign income and gains arising during the eligible period.
The four-year limit is central to the economics of the regime. The relief does not create a long-term shelter for foreign wealth. Instead, it creates a defined period in which qualifying new residents can receive specific treatment for foreign income and gains.
That makes arrival timing, foreign investment income, potential disposals and future residence plans more relevant to financial modelling. Once the FIG period ends, the general arising-basis rules apply to the individual’s worldwide income and gains.
The regime also differs fundamentally from the old remittance basis. It is based on qualifying residence history and a fixed period of relief, rather than continuing access based on non-domicile status and the treatment of remittances.
Why Residence History Is Becoming a Wealth-Planning Variable
The most significant change in the UK non-dom tax reform may be the increased financial importance of the residence calendar.
For a person who has spent at least 10 consecutive tax years outside the UK, entering the country can potentially begin a four-year FIG period. For someone with a long history of UK residence, the calculation is different. Returning residents, established residents and people leaving the country can therefore face materially different tax positions.
This creates an important distinction between the location of wealth and the tax position of its owner.
Consider a foreign investment portfolio. The economic outcome can differ depending on whether gains are realized before or after a person becomes UK resident, whether that person qualifies for FIG, how long they remain resident and whether they subsequently become a long-term UK resident.
The point is not that one sequence is universally preferable. Rather, the reform makes timing itself an economic variable.
For family offices and internationally mobile investors, this means residence history increasingly belongs in the same planning discussion as liquidity, asset allocation, ownership structures and estate planning.
The Inheritance-Tax Shift Is Reshaping Offshore Wealth Planning
Income tax and capital gains tax are only part of the change.
From 6 April 2025, the UK replaced its previous domicile-based Inheritance Tax framework with a residence-based system. HMRC defines a long-term UK resident generally as someone who has been UK resident for at least 10 of the previous 20 tax years. For such individuals, non-UK assets can fall within the scope of UK Inheritance Tax.
The rules also mean that leaving the UK does not necessarily produce an immediate break for IHT purposes. Depending on residence history, a former long-term UK resident can remain within the relevant framework for between three and 10 tax years after departure.
That creates a separate residence timeline for estate planning.
A family with offshore property, investment portfolios, private-company interests or trust structures therefore needs to consider not only current residence but also accumulated years of residence and the possible consequences of a future departure.
This is one reason the new system cannot be reduced to a simple question of whether someone is currently living in Britain.
The Temporary Repatriation Facility and the Legacy of Offshore Wealth
The transition also includes a temporary mechanism for qualifying former remittance-basis users.
The Temporary Repatriation Facility allows eligible individuals to designate qualifying historic foreign income and gains at a special rate during a limited three-year period. HMRC states that the rate is 12% for 2025–26 and 2026–27, rising to 15% for 2027–28.
The facility is particularly relevant to wealth accumulated under the former system because the abolition of the remittance basis changes the treatment of historic offshore income and gains.
It should not, however, be viewed as a blanket tax-saving mechanism. Eligibility, the nature of the historic assets and an individual’s previous tax position all matter. For former remittance-basis users, the transition therefore requires analysis of legacy wealth rather than simply adopting the rules for new arrivals.
What Happens to Trusts, Offshore Portfolios and Family Structures?
The change in the central connecting factor also has implications for structures created under the former regime.
Non-UK trusts, offshore companies, family investment structures and foreign portfolios may have been established when domicile and remittance were important parts of the planning framework. Their continued treatment now needs to be considered against the residence-based rules and the specific legislation governing each structure.
This does not mean that offshore structures automatically become ineffective or disadvantageous. It means that assumptions made when they were established may no longer produce the same tax result.
For family offices, the practical issue is therefore less about abandoning structures and more about understanding how residence, beneficiaries, asset ownership and future transactions interact under the new framework.
Is the UK Still Competitive for Global Wealth?
The tax reforms do not provide a simple answer.
The UK continues to offer financial infrastructure, deep capital markets, a large professional-services sector, international connectivity and an established business environment. For globally mobile families, those factors can matter alongside taxation.
At the same time, the new framework introduces different considerations: worldwide taxation under the general arising basis, a limited FIG period, long-term residence rules for IHT and greater attention to residence history.
The economics of choosing the UK therefore extend beyond tax rates. A family may need to consider investment opportunities, business interests, education, lifestyle, succession planning, liquidity and legal structures alongside tax exposure.
The UK non-dom tax reform changes one part of that equation without determining the overall outcome for every internationally mobile investor.
What Global Investors and Families Should Reassess
The new framework makes a residence-led review relevant for people with significant cross-border wealth.
Key areas include:
- Current UK tax residence and residence history
- Foreign investment income and capital gains
- Offshore portfolios and private-company interests
- UK and foreign property
- Trusts and family investment structures
- Potential asset disposals
- Historic remittance-basis positions
- Long-term Inheritance Tax exposure
- Potential departure or return to the UK
- Eligibility for the Temporary Repatriation Facility
The objective is not to find a universal strategy. It is to understand how the tax consequences of major financial decisions may change when residence and timing change.
Residence Is Becoming an Economic Variable in Global Wealth Planning
The deeper significance of the reform is that residence is becoming harder to separate from the economics of an individual’s assets.
Under the former framework, international planning could be heavily influenced by:
Domicile + remittance
Under the new framework, the calculation increasingly involves:
Residence + residence history + timing + asset location + future mobility
The same foreign portfolio, business interest or family structure can have different consequences depending on when its owner becomes UK resident, whether they qualify for FIG, how long they remain resident and whether they later become subject to the long-term residence rules for IHT.
For globally mobile wealth, the tax cost of an asset can therefore no longer be considered entirely separately from the owner’s residence timeline.
That does not make one residence strategy universally optimal. It makes the planning model more dynamic.
Conclusion
The UK’s non-dom reform represents a structural change in international wealth planning. The central shift is from a system heavily influenced by domicile and remittance toward one in which tax residence, residence history and timing play a much greater role.
For wealthy individuals, entrepreneurs, family offices and global investors, the key question is no longer simply:
Where are my assets?
It increasingly becomes:
Where am I resident, how long have I been resident, and what happens if that changes?
The answer will depend on the interaction between tax, investment, family, business, lifestyle and legal considerations. The reform does not by itself establish whether global wealth will move toward or away from the UK. What it does is change the variables that international families must model when making long-term decisions.
FAQs
What happened to the UK’s non-dom tax regime?
From 6 April 2025, the previous domicile-based remittance-basis system was replaced with a residence-based framework.
What is the UK’s four-year FIG regime?
Qualifying new UK residents who have been non-UK resident for at least 10 consecutive tax years can claim relief on qualifying foreign income and gains during their first four years of UK residence.
Does the UK still tax foreign income and gains?
Generally, UK residents are taxed on the arising basis on worldwide income and gains. The FIG regime provides a specific, time-limited relief for qualifying new residents.
What is a long-term UK resident for Inheritance Tax?
Broadly, an individual becomes a long-term UK resident for IHT purposes after being UK resident for at least 10 of the previous 20 tax years. Non-UK assets may then fall within the IHT framework.
What is the Temporary Repatriation Facility?
The TRF is a temporary mechanism for qualifying former remittance-basis users to designate qualifying historic foreign income and gains. It operates for 2025–26 through 2027–28, at rates of 12% for the first two years and 15% for the final year.
Does leaving the UK immediately end Inheritance Tax exposure?
Not necessarily. Long-term UK residents can remain within the relevant IHT framework for a period after leaving, with the duration depending on their residence history.
Investment Disclaimer: This article is for informational and educational purposes only and does not constitute legal, tax, financial, investment or wealth-management advice. UK tax rules, HMRC guidance and legislation can change, and individual outcomes depend on residence history, asset ownership, family structures and other circumstances. Readers should consult qualified UK tax and legal professionals before making cross-border wealth or residency decisions.
Contributing Editor for Alt Finances, vision-driven with 20+ years in family office, asset management, and corporate development. Holds UN Special Consultative Status and is 100 Women in Finance Board Chair. Tulane University – A.B. Freeman School of Business.
