The UK Tax Reform: A Comprehensive Analysis of the New Foreign Income and Gains (FIG) Regime

Introduction: The End of a Century-Old Era

The United Kingdom's tax system has undergone its most profound transformation in decades. With effect from 6 April 2025, the British government has formally abolished the remittance basis of taxation and eliminated the historic concept of domicile as a relevant connecting factor in the tax system. This framework, which for over a century allowed non-domiciled residents (colloquially known as "non-doms") to keep their foreign income and gains out of the reach of HM Revenue and Customs (HMRC) as long as they were not brought into the country, has been replaced by a modern system based strictly on tax residence.

In its place, the British legislature has introduced the Foreign Income and Gains regime (the FIG regime). This new regulatory framework aims to simplify tax administration and incentivize direct investment in the domestic economy. However, while the FIG regime facilitates repatriation, the overall reform package (including the restructuring of Inheritance Tax or IHT to tax worldwide assets after 10 years of residence and maintain this exposure for up to 10 years after departure, alongside the loss of trust protections) places the UK at a competitive disadvantage compared to other European non-habitual resident regimes. Transition to this new scheme presents significant technical challenges, rigorous compliance requirements, and a series of limitations that high-net-worth individuals must understand in detail.

The New Paradigm: Residence vs. Domicile

Historically, domicile status was a common law concept independent of tax residence. An individual could reside in the UK for many years but retain an overseas domicile of origin, allowing them to opt annually for the remittance basis. From 6 April 2025, this distinction disappears for tax purposes. The UK is adopting an arising basis of assessment on worldwide income and gains for all its residents, with the sole exception of those who qualify and actively claim the FIG regime for a limited period.

The new FIG regime is legally distinct from the former remittance basis and must not be confused with it. While the remittance basis penalized the introduction of foreign funds into British territory, the FIG regime completely eliminates the notion of a taxable "remittance" for qualifying beneficiaries, allowing the free flow of capital into the UK. Likewise, the abolition of the remittance basis eliminates the tax protection regime for trusts (trust protections) for settlors, exposing the income of historical structures to immediate taxation under attribution rules (such as ToAA or settlements legislation).

Eligibility Criteria: The Ten-Year Threshold

Access to the FIG regime is neither universal nor automatic. To be considered a "qualifying new resident", a taxpayer must meet a highly stringent standard of prior disconnection. Specifically, the individual must come to the UK after a period of at least 10 consecutive tax years of non-UK tax residence immediately prior to their arrival or return to the country.

The determination of tax residence, both for the period of absence and for the year of arrival, is governed exclusively by the Statutory Residence Test (SRT). The SRT is an objective and complex framework that assesses the number of days of physical presence in the UK and the individual's ties or connections to the country (such as available accommodation, full-time work, or family ties). If a taxpayer fails to demonstrate continuous non-residence for 10 years under the SRT, they will be automatically excluded from the FIG regime and taxed on the ordinary worldwide arising basis from day one of their residence.

Practical Mechanics of the FIG Regime: Four Consecutive Years

For taxpayers who meet the 10-year non-residence requirement, the FIG regime offers complete tax relief on their foreign income and gains arising during their first 4 tax years of UK residence. The 4-year clock begins to run inexorably from the first tax year in which the individual becomes a UK resident.

It is crucial to emphasize that this 4-year period is strictly consecutive. If a taxpayer decides to leave the UK temporarily during this timeframe (for example, in the third year) and becomes a non-UK tax resident, the clock does not stop. The years spent outside the country are not suspended or postponed: they are permanently lost for the purposes of the relief. Upon their return, the taxpayer can only claim relief for the remaining years within the original 4-year period, if any remain.

Furthermore, the FIG regime does not apply automatically. The taxpayer must make an explicit, annual claim on their tax return using form SA109 (Residence, foreign income and gains pages). If a claim is not made for a specific year, the relief for that year is lost and cannot be rolled over or accumulated for future tax years.

The Ultimate Advantage: Tax-Free Repatriation

The fundamental and most attractive difference of the FIG regime compared to the old remittance basis lies in the treatment of repatriated funds. Under the previous scheme, any attempt to introduce exempt foreign income or gains into the UK (whether to purchase a property, invest in a local business, or cover living expenses) triggered an immediate and often very high tax liability.

Under the FIG regime, this barrier disappears entirely. Individuals who qualify and claim the relief are not required to keep their foreign income and gains outside the UK. If they choose to physically transfer these funds to a UK bank account or use them to acquire assets in British territory, there is no tax liability when they do. While physical repatriation is no longer taxed, representing an operational simplification, the drastic reduction of the exemption period to just 4 years (compared to the previous remittance basis which could extend for longer) significantly reduces the overall attractiveness of the UK compared to European competitors offering longer-term incentives.

Table of Differences Between Tax Instruments

To avoid common misunderstandings in international tax planning, it is necessary to distinguish the FIG regime from other current or historical mechanisms in the UK:

Critical Restrictions: Disqualified Income and Loss of Allowances

Despite the generosity of the regime, the British legislature has incorporated strict safeguards to prevent system abuse. Not all income received abroad by a new resident qualifies for the exemption.

In accordance with the applicable legislation, specifically Section 845H of the Income Tax (Trading and Other Income) Act 2005 (ITTOIA 2005), the income must formally qualify as "qualifying foreign income". Conversely, any income categorized as "disqualified income" under Section 845I of the same Act will be excluded from the relief and will be subject to ordinary UK income tax, regardless of its geographic origin or the taxpayer's general eligibility (see RFIG45200). This includes, for instance, certain dividends from controlled foreign companies or employment income that does not meet the conditions of the Overseas Workday Relief (OWR).

Moreover, electing to use the FIG regime carries an indirect financial cost that middle-to-high-income taxpayers must evaluate. By claiming relief under the FIG regime for a given tax year, the individual loses their entitlement to UK personal allowances for income tax, as well as the Capital Gains Tax annual exempt amount, as detailed in HMRC Guidance. For taxpayers with moderate foreign income, the loss of these personal allowances and exemptions could outweigh the benefit of the exemption, requiring a detailed comparative analysis before submitting form SA109.

The Case of Returning Former Remittance Basis Users

One of the most complex provisions of the 2025 tax reform regulates the situation of taxpayers who previously used the remittance basis, left the UK, and decide to return under the new FIG regime.

The regulations are clear on this matter: former remittance basis users who return to the UK after a period of at least 10 consecutive tax years of non-UK residence and are eligible for the FIG regime cannot claim relief for any foreign income and gains that accrued prior to 6 April 2025 when they were UK resident and using the remittance basis. These historical funds retain their original legal character and will continue to be subject to the previous remittance rules if introduced into the UK, unless they utilize specific transitional mechanisms such as the Temporary Repatriation Facility (TRF). Nevertheless, to mitigate the impact on historic capital gains, the reform introduces a rebasing rule that allows taxpayers transitioning away from the remittance basis to revalue certain foreign assets to their market value as of a designated date, thereby reducing the Capital Gains Tax (CGT) exposure upon their future disposal.

Practical Implications and Tax Compliance

Implementing the FIG regime demands rigorous planning and impeccable record-keeping. Because the regime requires an annual, optional claim, taxpayers must meticulously segregate their bank and investment accounts. It is vital to distinguish between:

1. Income and gains generated before 6 April 2025.
2. Income and gains generated on or after 6 April 2025 that qualify for the FIG regime.
3. Disqualified income under section 845I of ITTOIA 2005.
4. UK-source income, which is fully taxable from day one.

Accidentally mixing these funds in a single bank account (known as creating "mixed funds") can severely complicate tax return filing and jeopardize the tax-free status of repatriated funds. HMRC possesses broad audit powers to trace any funds introduced into the country.

Finally, due to the technical complexity of declaring residence and claiming the FIG regime, the official notes for form SA109 warn that taxpayers wishing to submit these pages online will need to purchase commercial software or authorize a professional agent to file the tax return on their behalf. Self-management without specialized advice carries a high risk of making material errors that could result in the loss of the tax benefit or severe administrative penalties.

Disclaimer

The determination of tax residence under the Statutory Residence Test (SRT) and the application of the FIG regime depend on the individual facts and circumstances of each taxpayer. This article is for informational purposes only and does not constitute personalized tax or legal advice. It is strongly recommended to consult with a qualified professional advisor before making any decisions. Furthermore, please note that the taxation of trusts and other complex structures under the new ToAA and Settlements Legislation rules is transitional in nature, and its final practical application will depend on the definitive enactment of the Finance Bill 2024-25.