Last Updated: April 2026
The UK non-domicile regime was one of the most significant and contested aspects of UK tax law โ used by hundreds of thousands of non-UK-domiciled individuals living in the UK to shelter foreign income and gains from UK tax. From 6 April 2025, the regime was substantially reformed, abolishing the remittance basis and replacing it with a residence-based Foreign Income and Gains (FIG) regime. The changes are the most significant restructuring of UK international tax rules in decades, with major implications for wealthy migrants, international investors, and existing long-term non-doms.
The non-dom reform affects several distinct groups differently:
New arrivals to the UK (after 6 April 2025, 10+ years non-UK resident): These individuals access the new 4-year FIG regime automatically. They benefit from the simplification (no remittance restriction, no RBC) and from the improved OWR. The regime is less generous than the old remittance basis (which had no time limit) but cleaner and more accessible.
Existing non-doms in years 1-7 of UK residence before April 2025: These individuals were using the remittance basis without paying the RBC. From April 2025, they switch to FIG rules if they have been non-resident for 10+ years before their most recent UK arrival. In many cases, they are mid-way through their FIG window.
Long-term non-doms (7+ years in the UK before April 2025): These individuals previously paid the RBC (ยฃ30,000โยฃ90,000) for remittance basis access. From April 2025, they no longer qualify for FIG (they have been UK resident within the prior 10 years). They are subject to full UK worldwide taxation. The TRF is the primary planning tool available to them for offshore accumulated income.
Excluded property trust settlors: Trusts settled before 6 April 2025 by non-doms who were not yet 'long-term residents' (i.e., had been UK resident fewer than 10 of the prior 20 years as at April 2025): grandfathered. Foreign assets in these trusts remain excluded property for IHT. This is one of the most significant pre-reform planning opportunities that has now closed.
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US Citizen Non-Dom UK Tax Help โIt depends on your prior UK residence history. To qualify for FIG, you must not have been UK tax resident in any of the 10 tax years immediately before the tax year in which you first become UK resident under the new rules. If you first became UK tax resident in 2023โ24 (tax year ending April 5, 2024) and had not been UK resident in any of the 10 prior UK tax years (2013โ14 through 2022โ23): you qualify for FIG from 2023โ24. Your FIG window covers 2023โ24, 2024โ25, 2025โ26, and 2026โ27 โ four tax years. If your fourth year was 2026โ27: from 2027โ28, you are subject to full UK worldwide taxation. Important: UK tax years run from April 6 to April 5. Residence is determined by the UK Statutory Residence Test (SRT) โ not by visa status or domicile. Count your UK tax years carefully using the SRT split-year rules if applicable.
Excluded property trusts settled before 6 April 2025 retain their protected status for assets that were excluded property at the time of settlement, subject to an important condition: the trust must have been settled by an individual who was not a 'long-term resident' (i.e., had been UK resident fewer than 10 of the prior 20 years) at the time of settlement. If the trust was settled before the cut-off date and the settlor was not yet an LTR: the trust's foreign assets remain excluded property for UK IHT โ they are not in the settlor's estate on death, regardless of how many years the settlor subsequently lives in the UK. If the trust was settled after 6 April 2025 by an LTR: no excluded property protection. New trusts settled by LTRs: worldwide assets are within UK IHT scope. The grandfathering provision is the most significant IHT planning outcome of the reform โ trusts settled before April 2025 by qualifying individuals are extraordinarily valuable and should be maintained carefully with appropriate legal advice.
The TRF decision depends on several factors: (1) Size of your offshore remittance basis income pool: if you have significant pre-April 2025 foreign income sitting offshore (e.g., ยฃ2M in a foreign bank account that was never remitted), the TRF at 12% costs ยฃ240,000 in UK tax. Without TRF, if you later remit this money after 2028, it is taxed at your full marginal UK rate (up to 45%) โ ยฃ900,000. TRF saves ยฃ660,000. (2) How likely are you to remit the funds? If you plan to spend and invest abroad permanently, TRF may not be necessary. If you need or want to use the funds in the UK (property purchase, business investment, lifestyle expenses), TRF is almost certainly worth using before 2027-28. (3) Interaction with FIG: if you are a new arrival in your 4-year FIG window, you cannot designate the same income for both FIG exemption (post-April 2025 income) and TRF (pre-April 2025 income) โ but TRF covers only pre-April 2025 income, so there is no conflict. (4) Capital gains: pre-April 2025 capital gains can also be designated under TRF at 12% โ potentially very valuable if you have large unrealised gains on foreign assets that you want to realise in the UK.
After 12 years of UK residence, you are now a 'long-term resident' (LTR) under the new rules. From 6 April 2025: (1) Income tax: you are subject to full UK worldwide taxation โ no FIG exemption (you cannot access FIG as you have been UK resident within the last 10 years). (2) CGT: all worldwide gains are taxable in the UK. (3) IHT: your worldwide assets (including foreign assets) are within the scope of UK IHT at 40%. Your estate is no longer protected by non-domicile status for IHT. (4) Excluded property trusts you settled before April 2025 (when you had been UK resident fewer than 10 of the prior 20 years): these trusts' foreign assets retain excluded property status โ this is a significant and permanent protection. (5) TRF: use the TRF window (2025โ2028) to bring pre-April 2025 offshore remittance basis income to the UK at 12%/15% โ before the window closes and those funds become taxable at full rates on remittance. Practical priority: engage a UK private client solicitor for IHT estate planning review, and a UK tax adviser for TRF modelling, before the TRF window closes in April 2028.