Sparing No One: Cross-Border Taxation of Globally Mobile Individuals – Part 2

Naomita Yadav Lara Crompton and Emma Cooper-Hedges 9 October 2023

Sparing No One: Cross-Border Taxation of Globally Mobile Individuals – Part 2

This article continues to examine – via the circumstances of Prince Harry and Meghan, the Sussexes – the issues that arise when a taxpayer is subject to tax in two countries such as the US and UK. This is the second half of a detailed two-part analysis.

This is the second part of a two-part examination of cross-border tax matters for “globally mobile” individuals. (See part 1, here.) The article takes up the well-chronicled example of the financial affairs of Prince Harry and Meghan, the Sussexes. The authors of this article are Naomita Yadav, partner; Lara Crompton, special counsel, and Emma Cooper-Hedges, senior associate, at Withers, the law firm. The editors of this news service are pleased to share this detailed and important analysis. The usual editorial disclaimers apply and as always, readers are welcome to respond. Email

Talking transfer taxes
Both the US and UK transfer tax regimes are based on the concept of “domicile,” which can be loosely defined as the place that an individual considers their “home” and where they intend to reside permanently (43). By relying on the individual’s subjective intent, domicile is highly facts and circumstances driven as compared with more objective tests applicable in the income tax context.

The Sussexes present an unusual domicile case study, namely, that of a senior member of the British royal family and his spouse resigning their monarchical posts, moving to the US, and publicly announcing their intent for their Santa Barbara home to be their primary residence. Did Harry and Meghan change their domicile when they moved across the pond, and what does this mean for their gift, estate, and inheritance tax exposure in the US and the UK?

US tax liability
Like US income taxes, US gift and estate taxes are generally applicable to all US citizens, wherever located (44). Therefore, since Meghan is a US citizen, gifts or bequests from her estate generally remain subject to US gift and estate tax rules. Harry’s US gift and estate tax liability could arise in one of two situations:

-- if Harry is determined to be a US domiciliary (or citizen) at the time of transfer; or
-- if Harry transfers US situs assets when he is a non-citizen, non-domiciliary of the US (45)   

In the first instance, US transfer taxes would apply to Harry’s worldwide estate (or gifts of property located anywhere in the world). In the second instance, only US situs assets (which are determined differently for gift versus estate purposes) would be subject to US transfer taxes.

Harry’s US domicile and Federal Transfer Tax issues
There is no clear test based on presence for a given number of days in a year to determine domicile. Assuming Harry does not obtain US citizenship, his domicile for US purposes is difficult to determine. Critical to this analysis is his subjective intent upon moving to the US, which includes, as a flip side, an intent to abandon his UK domicile. An individual can have only one domicile, therefore, to acquire a US domicile, a non-US citizen must lose their non-US domicile.

Were he an ordinary British citizen, Harry’s circumstances might indicate someone who has entered the US with a nonspecific goal, whose family locus is in the country (his wife and children are US citizens, combined with a rather public falling out with his own family), and whose business concerns (such as with the Netflix deal) are in the US. This would lean in favour of having created a US domicile. But of course, Harry is not a regular British citizen. He is, even now, fifth in line to the throne of one of the oldest remaining monarchies.

Harry's split with the royal family was public, as was his retirement as a working royal, and his proclamation of making a home in California (46). He has also not kept a routine of visits to the UK – rather, each visit since his move to California has had a specific purpose, such as attending Queen Elizabeth II’s funeral. The place he returns to when not travelling for a specific purpose appears to be California, but whether this is adequate to overcome his unique ties to the UK is difficult to assess. One deciding factor could be his financial locus – whether his assets are now predominantly in the US or remain in the UK. This would include, for example, weighing the potential value of his new business ventures against any remaining claims or inheritance in the UK. If his financial ties are also weighted in favour of the US, combined with other factors, this would more clearly determine that his domicile is the US in the eyes of the IRS.

Either way, it would behove the Duke of Sussex to ensure that whichever domicile (US or UK) he wishes to claim, that he has objective support of his subjective intent lest both countries claim he is domiciled there. For example, applying for a US green card and moving more assets to the US would more clearly support his domicile claim there. Or making more family visits to the UK, retaining more assets there, and maintaining a US presence on a non-immigrant visa would support a UK domicile. A murky domicile opens the doors for transfer tax claims by both jurisdictions.

If Harry’s US domicile is unclear, tax authorities in the US are more likely to claim that he is not US domiciled if he transfers any US assets because there is no “lifetime exemption” as such (47). Gifts of US situs assets (for example, real property), excluding any intangibles, over the annual exclusion amount (48) ($17,000 per donee) are taxable at 40 per cent. Estate transfers of any US situs assets (including intangibles) are exempt up to $60,000, subject to 40 per cent estate tax.

However, if he makes a transfer of non-US assets – for example, UK real estate – US tax authorities are more likely to claim that he is US domiciled because any value over the available lifetime exemption (unified credit) would be subject to gift or estate tax in the US.

One planning technique for mitigating the effect of unclear domicile for US federal estate tax purposes would be for Harry to own any assets under a foreign “blocker” entity rather than in his own name. This structure would hedge against a non-US domicile upon his death. If assets are owned by Harry through a foreign (that is, non-US) entity that is treated as a C corporation for US tax purposes, upon his death, heirs or other takers under testamentary documents will inherit shares of a non-US corporate entity, which are treated as a non-US situs asset (49).

Should he make lifetime gifts, that too would be a gift of a non-US situs asset. In either case, it protects from US transfer tax if he is not a US domiciliary at the time of the transfer. Unfortunately, if he is not a US domiciliary at the time of death, he will (as of now) be treated as a UK domiciliary. However, the foreign blocker entity would not assist his UK inheritance tax (IHT) exposure, as explained further below.

Regarding lifetime (gift) transfers, a unique opportunity may exist from a US perspective for lifetime wealth transfer in the form of a gift of intangible assets, which includes stock or other entity interests. A lifetime gift of entity interests by a non-citizen, non-domiciliary (except for some expatriates) is not subject to US gift tax even if the entity is a US entity (50).  

Were Harry to make a gift of intangible assets, if he has a basis to assert non-US domicile, he may be able to achieve wealth transfer unfettered by any US gift taxes. Further, if the IRS challenged his position regarding domicile and won – a difficult feat given his unique ties to the UK – he would then be entitled to offset that gift against the lifetime exemption that is available to all US domiciliaries, and which is at an all-time high of $12.92 million per person (51). He may also be able to gift-split with Meghan, (52) who has the same amount of exemption available to her (assuming she has not made past gifts in excess of annual exclusion amounts), and further reduce the value of any taxable gift.

Marital transfers are also an important area to consider for the Sussexes. If an individual (US domiciled or not) leaves their estate to their US citizen spouse, a full marital deduction is available, but if the spouse is not a US citizen, it is not available unless the assets are left in a special type of trust called a qualified domestic trust (53).  Assuming the value of Meghan’s estate would exceed her available exemption at her time of death, she will want to ensure that she includes a qualified domestic trust for Harry in her estate plan to avoid US estate tax on her death, followed by a potential UK IHT charge on Harry’s passing. Failing to use a qualified domestic trust could substantially decrease the value of assets that can be passed on to their children.

UK-US Treaty tiebreaker analysis
The convention between the US and the UK for the avoidance of double taxation and the prevention of fiscal evasion regarding taxes on estates of deceased persons and on gifts (the treaty) (54) covers:

-- the US federal gift tax;
-- the US federal estate tax; and
-- US generation-skipping transfer tax and IHT (55).

Importantly, the treaty provides for a tiebreaker analysis under article 4 regarding domicile. As it relates to Harry, article 4, paragraph 2 provides that a UK national domiciled in both Contracting States shall be deemed to be domiciled in the UK for the purposes of the treaty if he had not been resident in the US for Federal income tax purposes in seven or more of the 10 tax years ending with the year in which the death or transfer occurs (56). 

Given Harry’s ties to the UK and probable continuity of domicile, this tiebreaker could be crucial for the next few years because it would likely result in Harry continuing with a UK domicile for treaty purposes. This further supports the lifetime gifting opportunity regarding intangibles and a prophylactic measure to create an estate blocker for US estate tax purposes. The treaty does not address US state transfer taxes, discussed below.

State transfer tax issues
Although California does not impose any transfer taxes, other states, such as New York and Washington, impose an estate tax. Connecticut is the only state to impose both gift and estate taxes. Therefore, the Sussexes would be well-advised to not establish any unintentional ties with other US states. Furthermore, since some states that impose an estate tax may do so for real property in that state regardless of the domicile of the owner (57), care should also be taken upon acquisition of real property.

Beyond the direct imposition of estate taxes, state domicile presents additional issues regarding marital rights and probate or estate administration. As discussed in Part I, marital rights can attribute ownership of assets to a spouse and cause income taxation in that spouse’s state of residence. Estate taxes can similarly arise. 

For example, if California community property rules apply to the Sussexes, their California residence would be treated as owned 50 per cent by each of them (assuming title is held under either of their names, or a revocable trust established by either of them). This means that even if they decide it is better for the title to be solely in Meghan’s name (to reduce Harry’s US estate tax exposure), community property rules would attribute 50 per cent ownership to Harry, which would cause him to have a taxable US estate if he remains a non-US domiciliary at his time of death. Since they were married in the UK, they should ensure that any pre- or post-nuptial agreements continue to operate in their intended manner now that they reside in the US.

In most states, including California, a probate process can be time-consuming and expensive, leading most estate planners to advise clients to hold title to their US assets under a revocable trust (58). However, even a transfer to a simple revocable trust – a non-taxable event in the US – may cause issues if Harry’s domicile remains in the UK. As discussed below, a transfer to a trust by an individual who is UK domiciled (or deemed domiciled for IHT purposes) would trigger an upfront IHT charge. However, it may be possible to draft a US revocable trust so that it should not be treated as a substantive trust for UK purposes. If the drafting and governing law is consistent with the limitation that, while the settlor has capacity to revoke the trust, the duties of the trustee are owed exclusively to the settlor (59), then it can be said that, during the period that the settlor has capacity, the property is not held in trust (60). The risk of this position changing if the settlor loses capacity, would, however, need to be carefully considered.

UK tax liability
IHT is primarily a charge on an individual’s estate on death (61). However, it can arise on chargeable lifetime gifts (for example, gifts to relevant property trusts (62),  gifts to companies, and gifts involving “close” companies). Individuals have a nil rate band (63) in which IHT is charged at 0 per cent. On the balance, the rate of tax is 20 per cent for lifetime gifts or 40 per cent on estates on death (or 36 per cent if 10 per cent or more of the net estate is given to charity), subject to available exemptions or reliefs.

Individuals who are domiciled or deemed domiciled in the UK are subject to IHT on their worldwide estate. However, individuals who are neither domiciled nor deemed domiciled in the UK are taxed on their UK situs assets and some assets that derive their value from UK residential property. 

A person who does not acquire a UK domicile (whether actual or deemed), who is not a formerly domiciled resident (FDR) (64), who does not elect to be treated as UK domiciled, and who does not own (i) any UK situated property directly, (ii) an interest in a non-resident company that owns UK residential property, or (iii) the benefit of a loan made to another to acquire UK residential property directly or indirectly, and has not used non-UK situs assets as collateral for a loan, should incur no IHT liability.

Harry and Meghan’s UK domicile
Domicile, for general UK purposes, remains a facts and circumstances test, which is likely to have resulted in much head-scratching among Harry and Meghan’s advisors. In general terms, a person is domiciled in the country where he has made his permanent home. As noted in Part I, there are three types of domicile under general law: (1) domicile of origin, (2) domicile of dependency and (3) domicile of choice. 

For tax purposes, some individuals will be deemed to be domiciled in the UK Since 6 April 2017, individuals (65) who are non-UK domiciled under general law (other than formerly domiciled residents (FDRs)) and who have resided in the UK in at least 15 out of the preceding 20 UK tax years (no matter when they arrived) will be deemed to be domiciled in the UK for income tax and capital gains tax purposes. 

For IHT purposes, there is an additional requirement that the individual has been UK resident for at least one of the four UK tax years ending with the UK tax year in question. For income tax and capital gains tax purposes, this deemed domicile status will be lost if the individual leaves the UK and remains non-resident for at least six complete UK tax years. 

For IHT purposes, deemed domicile status can be lost after three UK tax years of non-residence, but for it not to be immediately reacquired on return to the UK, it is necessary to remain non-resident for at least six complete UK tax years. Different rules apply to FDRs because they are treated as deemed domiciled from the tax year in which they become UK resident for income tax and capital gains tax purposes (and once they have been UK resident in one of the two preceding UK tax years for IHT purposes).

It is possible for an election to be made (66) for an individual who is or was (67) not domiciled or deemed domiciled (or an FDR) in the UK but who has or had (68) a UK spouse or civil partner who was UK domiciled or deemed domiciled (or an FDR) to be treated as UK domiciled for most IHT purposes (69). Making an election may be advantageous if the spouse or civil partner exemption would otherwise be limited (70) because assets pass – either by a lifetime gift or transfer on death – from a UK domiciled or deemed domiciled individual (or an FDR) to the individual’s spouse or civil partner who is not UK domiciled or deemed domiciled (and was not an FDR). Although the election is irrevocable, it ceases to have effect once the individual who made the election has been a non-UK resident for four successive complete UK tax years.

What, then, is Harry and Meghan’s position? For UK general law purposes, Meghan will have inherited her father’s domicile at birth (71). We will assume for these purposes that she inherited a California domicile of origin, which has not been displaced by a domicile of choice in another jurisdiction. 

Although it is arguable that an individual marrying into the British royal family must have believed that the UK might be their permanent home, “Megxit” demonstrated that Meghan no longer has any intention to reside there permanently or indefinitely. Because her time in the UK was brief, Meghan does not satisfy the 15 out of 20-year test, and so cannot be deemed domiciled in the UK. Even if she had acquired a domicile of choice in the UK at some point, over three years (72) have now passed since her departure, so Meghan’s IHT exposure should be limited to UK situs assets and assets that derive their value from UK residential real estate.

Harry’s position is different. He will have inherited his father’s domicile of origin at the time of his birth and will thus have an English domicile of origin under common law. The next question is whether he has successfully acquired a domicile of choice in California following his departure from the UK. 

Harry’s advisors will be acutely aware that a domicile of origin is particularly adhesive. It is suspended when a domicile of choice in another country is acquired by: (i) actual residence in the new country; and (ii) an intention to reside in the new country permanently and indefinitely. Both these elements must be present at the same time; otherwise, a domicile of choice (or a new one) is not acquired (73). However, the domicile of origin will then revive if an individual abandons a domicile of choice without acquiring a new one. By contrast, a domicile of choice is lost when a person leaves that country with the intention of never returning to it (74). 

The court examines all the circumstances of an individual’s life to establish whether they have the requisite intention to reside permanently or indefinitely in the new country. It may be easier to establish the loss of a domicile of choice than the loss of the domicile of origin – the courts require stronger evidence to prove the latter (75) – which is likely to be difficult for Harry.

If HM Revenue & Customs decides to investigate Harry’s domicile position, it will involve a detailed and deeply personal examination of his background, lifestyle, and intentions over his lifetime (76). The following factors are likely to be relevant:

-- retirement from his position as a senior member of the royal family and consequential changes to his public position, funding status, military appointments, and family relationships;
-- the presence of the family home in California and the residency status of both him and his immediate family; and
-- the absence of a UK residential property following the loss of Frogmore Cottage in Windsor and his limited UK presence.

Regardless of recent events, a domicile review cannot ignore that Harry is the son of the reigning monarch, King Charles III. It is likely to be extremely difficult for Harry to displace his UK domicile of origin and convince HMRC (let alone the British people and media) that he no longer considers the UK to be his permanent home without causing an outcry (77). The burden of proof will fall on Harry, given that a change of domicile must be proved by the person who asserts there has been a change (78). 

Given the uncertainty, if his advisors are prudent, they are probably planning on Harry retaining his UK domicile of origin. In this scenario, his worldwide estate will continue to be exposed to IHT, and the spouse exemption available for a transfer of assets to Meghan will be limited to £325,000 given the domicile mismatch between husband and wife (79).

Even if HMRC were to accept that a domicile of choice has been successfully acquired in California, Harry would continue to be treated as domiciled in the UK for IHT purposes for the three-year IHT “tail.” He would also need to consider the tax implications of any return to the UK given that he would then be classified as an FDR.

Lifetime gifting strategy
As discussed under the US analysis, lifetime gifts by Harry could be an impactful strategy. For UK purposes, Harry could use the favourable potentially exempt transfer regime here, under which outright gifts to an individual made during the donor’s lifetime will pass free of IHT if the donor survives seven years, or will benefit from taper relief if the donor survives at least three (80). There is no limit on the value an individual can give away under this regime, although for US citizens, the value will be restricted by the US gift and estate tax exemption.

Care will be required when navigating the differences between the base cost regimes in the US and the UK. For US tax purposes, gain or loss is measured by reference to the taxpayer’s basis. This is generally the taxpayer’s cost calculated in US dollars.

The donee’s basis of property received by gift is generally the same basis that the donor had in the gifted property. Accordingly, base cost will carry over to the donee when property is gifted, but the gift itself will not trigger a gain recognition event in the US. By contrast, the fact that no proceeds are received on a disposal of an asset does not mean that a chargeable gain will not arise from a UK perspective. With some exceptions, when a person disposes of an asset by way of gift or otherwise than by way of a bargain made at arm’s length, his disposal of the asset is deemed to be for a consideration equal to the market value of the asset. A gift will trigger a gain recognition event in the UK, potentially exposing the donor to a charge to capital gains tax should the asset be standing at a gain and fall within the UK tax net.

UK-US. Treaty comments from a UK perspective
The mismatch between the exempt amounts for UK IHT and US gift or estate tax (81) in the two systems is an interesting area that warrants a closer look. Detailed commentary on this topic is outside the scope of this article. We did, however, want to highlight that under the treaty, exclusive taxing rights are generally granted to the country of domicile (82), except regarding real estate and business property of a permanent establishment (83).  

The treaty mandates credits to prevent double taxation in most cases. As a result, it can be useful in protecting US domiciliaries, such as Meghan, from IHT on UK assets other than real estate or business property of a permanent establishment (PE). However, in one of the few situations when citizenship matters from a UK tax perspective, a UK citizen, such as Harry, even if US domiciled under the treaty, can still be taxed in the UK on UK situated property (for example, shares in a UK company or a UK bank account). Similarly, the US can tax its citizens (even those domiciled in the UK) on worldwide transfers, although the UK may have first taxing rights (as the domiciliary country) on all property other than real estate and business property of a PE.

Concluding remarks
When a taxpayer is subject to tax in both the US and UK, it is vital that expert advice is taken regarding formulating a tax-efficient estate plan and implementing planning techniques before moving. The cost of getting it wrong can be considerable. The US and UK tax systems spare no one, not even Harry and Meghan.


43,  Domicile is not defined and is interpreted based on common law principals for US tax purposes. Treas. reg. section 25.2501-1(b), which applies to gift taxes, for example, provides that a “person acquires a domicile in a place by living there, for even a brief period of time, with no definite present intention of moving therefrom.” For UK purposes, domicile is also a common law concept, determined by the principles established by English courts. The concept of domicile has also been imported into the U.K. tax legislation to determine an individual’s liability to U.K. income tax, U.K. capital gains tax, and U.K. inheritance tax (IHT).
44,  Treas. reg. section 25.2501-1(a)(1) and IRC section 2001(a) (both specifying that the relevant tax applies to transfers by “citizens or residents” of the U.S.). Resident in the context of transfer taxes means a domiciliary (see Treas. reg. section 25.2501-1(b)).
45,  IRC sections 2101-2106 et seq.
46,  See, e.g., Associated Press, “Prince Harry, Meghan Markle Move Into New California Home,” Aug. 13, 2020.
47,  See IRC section 2505(a) and Treas. reg. section 25.2505-1(a), which provide that unified credit is not available to offset gift tax for non-resident noncitizens.
48,  IRC section 2102(b)(1).
49,  Treas. reg. section 20.2105-1.
50,  Treas. reg. section 25.2511-3(a)(2).
51,  IRS, Estate Tax.
52,  IRC section 2513(a)(1).
53,  IRC section 2056A.
54,  UK-US Convention for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion With Respect to Taxes on Estates, Inheritances, and Gifts, 1182 U.N.T.S. 83 (Oct. 19, 1978); see also Treasury Technical Explanation of the 1978 Estate and Gift Tax Treaty (June 15, 1979).
55,  IHT replaced the capital transfer tax, to which the treaty refers, in 1986. 
56,  UK-US Convention for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion With Respect to Taxes on Estates, Inheritances, and Gifts, 1182 U.N.T.S. 83 (Oct. 19, 1978); see also Treasury Technical Explanation of the 1978 Estate and Gift Tax Treaty (June 15, 1979).
57,  For example, New York taxes real and tangible personal property of non-residents located in the state. See New York State Department of Taxation and Finance, Estate Tax.
58,  See, e.g., Rosemary Carlson, “Is Probate Really That Bad? Yes, and Here’s How to Avoid It,” Yahoo, Dec. 1, 2022.
59,  For example, American Uniform Trust Code section 603 provides that while a trust is revocable and the settlor has capacity to revoke the trust, “rights of the beneficiaries are subject to the control of, and the duties of the trustee are owed exclusively to, the settlor.” The California Probate Code imposes identical rules.
60,  Under English law, it is fundamental to the concept of assets being held in trust that there is an irreducible core of obligations owed by the trustees to the beneficiaries, which the beneficiaries can enforce against the trustee. See Armitage v. Nurse, [1998] Ch. 241, at 253.
61,  This includes gifts made within seven years of death (i.e., potentially exempt transfers) and gifts with reservation of benefit. However, potentially exempt transfers are potentially exempt.
62,  Trust property under the relevant property regime is subject to a separate IHT regime, details of which are beyond the scope of this article.
63,  The basic nil rate band is £325,000. A residence nil rate band may also be available.
64,  AN FDR is an individual who: (i) was born in the U.K.; (ii) has their domicile of origin in the U.K.; (iii) is U.K. tax resident in that U.K. tax year (as determined by the U.K.’s statutory residence test); and (iv) for IHT purposes only, was U.K. tax resident in one of the two immediately preceding U.K. tax years.
65,  Including minors.
66,  By the individual or, within two years of death, by the individual’s personal representatives.
67,  On or after 6 April 2013.
68,  If that spouse or civil partner died on or after 6 April2013, or the couple divorced or dissolved their civil partnership on or after that date.
69,  It is not possible to elect to be treated as U.K. domiciled for income tax, capital gains tax, or other purposes.
70,  To the prevailing nil rate band, £325,000. IHT is not payable on any gift made between spouses or civil partners during their lifetime or on death, provided that (i) both parties are domiciled in the United Kingdom for IHT purposes (that is, they are either domiciled or deemed domiciled there), or (ii) both parties are domiciled outside the United Kingdom for IHT purposes (that is, they are neither domiciled nor deemed domiciled there).
71,  If a legitimate child is born during the father’s lifetime (even if the parents are separated by the time the child is born), the child’s domicile of origin is taken to be the father’s domicile at the time of the child’s birth (Udny, LR 1 Sc. & Div. 441).
72,  There is a three-year “tail” starting from when an individual loses their U.K. domicile, in which they remain treated as domiciled for IHT.
73, Bell v. Kennedy, (1868) LR 1 Sc. & Div. 307.
74,  Again, both these elements must be present at the same time; otherwise, the domicile of choice will not be lost (Re Marrett (1887) 36 Ch. D. 400).
75,  Winans v. AG, (1904) AC 287.
76,  It can be helpful for clients to prepare a domicile statement to support their position, although this would be just one factor amongst myriad other factors that HMRC would consider, and its evidential value may be questioned if it is self-serving.
77,  To address similar sensitivities, s41 Constitutional Reform and Governance Act 2010 provides that sitting members of Parliament and members of the House of Lords are treated for the purposes of income tax, capital gains tax, and IHT as resident and domiciled in the United Kingdom to ensure that they are exposed to U.K. taxation in a similar manner to most of the population they serve. Regency Act 1937 s3(2) and s6(2A) note a scenario in which an individual eligible to act as regent or counsellor of state (being the sovereign’s spouse and the next four people in the line of succession who are over the age of 21) might not be domiciled in some part of the U.K., but promptly disqualifies them from acting in such a capacity.
78,  Moorhouse v. Lord, 10 HL Cas 272 (1863).
79,  This exemption can be made unlimited if Meghan elects to be treated as a U.K. domiciled spouse for IHT purposes.
80,  If the donor fails to survive for seven years, the gift becomes chargeable and will use up all or part of the donor’s nil rate band. However, the longer the donor survives after making the gift (subject to surviving at least three years), the lower the IHT.
81,  As noted above, the nil rate band on which IHT is charged at 0 percent is £325,000. By contrast, U.S. citizens and U.S. domiciliaries benefit from a $10 million exempt amount, indexed for inflation (although this will revert to $5 million, indexed for inflation, from 1 January 2026, unless legislation is changed).
82,  For individuals who are domiciliaries of both countries under domestic law, tiebreaker rules determine their domicile for treaty purposes. Citizenship and past residence are looked at first in article 4(2) and (3), so that, for example, if an individual is a U.K. citizen and not a U.S. citizen and has not been resident in the U.S. for federal income tax purposes in seven or more of the 10 tax years ending with the year of the gift or transfer, they will be treated as U.K. domiciled for the purposes of the treaty. If an individual’s treaty domicile position is not determined under article 4(2) or (3), their treaty domicile is determined by reference to the individual’s permanent home, personal and economic relations or “centre of vital interests,” and habitual abode (namely, the country in which the individual spends most of their time).
83,  Articles 6 and 7.

Register for WealthBriefingAsia today

Gain access to regular and exclusive research on the global wealth management sector along with the opportunity to attend industry events such as exclusive invites to Breakfast Briefings and Summits in the major wealth management centres and industry leading awards programmes