U.S.–UK Tax Treaty Explained: Dual Residency, Pensions, and Cross-Border Tax Planning for UK Expats

The Convention Between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion with Respect to Taxes on Income and on Capital Gains was signed on 24 July 2001. It was subsequently amended by protocols in 2002, 2003, and 2015. The treaty text analysed in this article is the original signed text as published by the U.S. Department of the Treasury, cross-referenced against the HMRC consolidated version and IRS Publication 901.

For UK nationals who become U.S. tax residents, or who hold dual residency across both countries, this treaty is the operative framework governing how income is taxed and how double taxation is relieved. The treaty interacts with U.S. domestic law in ways that are not obvious from the treaty text alone, and understanding which provisions apply, and which are overridden by the saving clause, is essential before taking any treaty-based position on a return.

1. What the Treaty Covers

Article 2, paragraph 1 sets out the scope of the Convention's application to taxes, providing that:

• This Convention shall apply to taxes on income and on capital gains imposed on behalf of a Contracting State irrespective of the manner in which they are levied.

Article 2, paragraph 3 then identifies the specific existing taxes to which the Convention applies. In the United States, these are the Federal income taxes imposed by the Internal Revenue Code, excluding social security taxes, and the Federal excise taxes on insurance policies issued by foreign insurers and on private foundations. In the United Kingdom, the Convention applies to income tax, capital gains tax, corporation tax, and petroleum revenue tax.

Article 2, paragraph 4 extends the Convention's reach forward in time, providing that:

• This Convention shall apply also to any identical or substantially similar taxes that are imposed after the date of signature of this Convention in addition to, or in place of, the existing taxes. The competent authorities of the Contracting States shall notify each other of any changes that have been made in their respective taxation or other laws that significantly affect their obligations under this Convention.

Article 1, paragraph 1 provides that, except as specifically provided, the Convention is applicable only to persons who are residents of one or both of the Contracting States. Article 1, paragraph 8 addresses fiscally transparent entities, providing that an item of income, profit or gain derived through a person that is fiscally transparent under the laws of either Contracting State shall be considered to be derived by a resident of a Contracting State to the extent that the item is treated, for the purposes of the taxation law of that State, as the income, profit or gain of a resident.

2. The Saving Clause: Article 1, Paragraph 4

The saving clause is the single most important provision for UK nationals who acquire U.S. tax status, whether through a green card or U.S. citizenship. Article 1, paragraph 4 states:

• Notwithstanding any provision of this Convention except paragraph 5 of this Article, a Contracting State may tax its residents (as determined under Article 4 (Residence)), and by reason of citizenship may tax its citizens, as if this Convention had not come into effect.

The practical consequence is that the United States retains the right to tax its citizens and residents on their worldwide income as if the treaty did not exist. A UK national who becomes a U.S. green card holder or citizen cannot use the treaty to exempt UK-source income from U.S. tax as a general matter.

Exceptions to the Saving Clause

Article 1, paragraph 5 sets out the specific provisions carved out from the saving clause. These remain available even to U.S. citizens and residents. The paragraph reads:

• The provisions of paragraph 4 of this Article shall not affect: a) the benefits conferred by a Contracting State under paragraph 2 of Article 9 (Associated Enterprises), sub-paragraph b) of paragraph 1 and paragraphs 3 and 5 of Article 17 (Pensions, Social Security, Annuities, Alimony, and Child Support), paragraph 1 of Article 18 (Pension Schemes) and Articles 24 (Relief From Double Taxation), 25 (Non-discrimination), and 26 (Mutual Agreement Procedure) of this Convention; and b) the benefits conferred by a Contracting State under paragraph 2 of Article 18 (Pension Schemes) and Articles 19 (Government Service), 20 (Students), and 28 (Diplomatic Agents and Consular Officers) of this Convention, upon individuals who are neither citizens of, nor have been admitted for permanent residence in, that State.

The carve-outs in paragraph 5(a) are preserved regardless of citizenship or residency status. They cover: the correlative transfer pricing adjustment under Article 9(2); sub-paragraph (b) of Article 17(1) and paragraphs 3 and 5 of Article 17 on pensions and social security; paragraph 1 of Article 18 on pension scheme income deferral; Article 24 on double taxation relief; Article 25 on non-discrimination; and Article 26 on the mutual agreement procedure.

The carve-outs in paragraph 5(b) are preserved only for individuals who are neither citizens of nor admitted for permanent residence in the taxing State. They cover: paragraph 2 of Article 18 on cross-border pension contribution relief; Article 19 on government service; Article 20 on students; and Article 28 on diplomatic agents and consular officers.

The distinction is decisive in practice. A UK national who holds a U.S. green card or U.S. citizenship cannot rely on Article 18, paragraph 2 to obtain relief for ongoing pension contributions. That relief is reserved for individuals who have not been admitted for permanent U.S. residency and are not U.S. citizens.

3. Dual Residency and the Article 4 Tie-Breaker

Article 4, paragraph 1 defines a resident of a Contracting State as follows:

• The term 'resident of a Contracting State' means, for the purposes of this Convention, any person who, under the laws of that State, is liable to tax therein by reason of his domicile, residence, citizenship, place of management, place of incorporation, or any other criterion of a similar nature. This term, however, does not include any person who is liable to tax in that State in respect only of income from sources in that State or of profits attributable to a permanent establishment in that State.

Article 4, paragraph 2 addresses the specific situation of U.S. citizens and green card holders, providing that:

• An individual who is a United States citizen or an alien admitted to the United States for permanent residence (a 'green card' holder) is a resident of the United States only if the individual has a substantial presence, permanent home or habitual abode in the United States and if that individual is not a resident of a State other than the United Kingdom for the purposes of a double taxation convention between that State and the United Kingdom.

Where an individual is a resident of both Contracting States under their respective domestic laws, Article 4, paragraph 4 provides a sequential tie-breaker. The paragraph states:

• Where by reason of the provisions of paragraph 1 of this Article, an individual is a resident of both Contracting States, then his status shall be determined as follows: a) he shall be deemed to be a resident only of the State in which he has a permanent home available to him; if he has a permanent home available to him in both States, he shall be deemed to be a resident only of the State with which his personal and economic relations are closer (centre of vital interests); b) if the State in which he has his centre of vital interests cannot be determined, or if he does not have a permanent home available to him in either State, he shall be deemed to be a resident only of the State in which he has an habitual abode; c) if he has an habitual abode in both States or in neither of them, he shall be deemed to be a resident only of the State of which he is a national; d) if he is a national of both States or of neither of them, the competent authorities of the Contracting States shall endeavour to settle the question by mutual agreement.

The tie-breaker sequence runs from permanent home through centre of vital interests, habitual abode, nationality, and finally mutual agreement. It is applied sequentially and only when the first test is inconclusive does the next test apply.

Article 4, paragraph 5 addresses entities rather than individuals. Where a non-individual entity is resident in both Contracting States and the competent authorities do not reach a mutual agreement on how to apply the Convention, that entity is not entitled to claim any benefit under the Convention except those in Article 24, paragraph 4, Article 25, and Article 26.

4. Article 17: Pensions, Social Security, Annuities, Alimony, and Child Support

Paragraph 1 - Periodic Pension Income

Article 17, paragraph 1 contains two sub-paragraphs that together govern the treatment of periodic pension income. Sub-paragraph (a) provides the general rule:

• Pensions and other similar remuneration beneficially owned by a resident of a Contracting State shall be taxable only in that State.

The general rule is therefore residence-based: taxing rights over pension income follow the recipient's State of residence. Sub-paragraph (b) then creates an important exception:

• Notwithstanding sub-paragraph a) of this paragraph, the amount of any such pension or remuneration paid from a pension scheme established in the other Contracting State that would be exempt from taxation in that other State if the beneficial owner were a resident thereof shall be exempt from taxation in the first-mentioned State.

The effect of sub-paragraph (b) is that where a UK pension payment would have been exempt from UK tax had the recipient been a UK resident, for example, because it falls within a tax-free element of a UK registered pension scheme, it is also exempt from tax in the recipient's State of residence, which for a U.S.-based UK expat means exempt from U.S. tax. This provision survives the saving clause under Article 1(5)(a), meaning it is available to U.S. citizens and residents.

Paragraph 2 — Lump Sums

Article 17, paragraph 2 departs from the residence-based rule and provides that:

• Notwithstanding the provisions of paragraph 1 of this Article, a lump-sum payment derived from a pension scheme established in a Contracting State and beneficially owned by a resident of the other Contracting State shall be taxable only in the first-mentioned State.

The taxing right for a lump-sum payment therefore follows the State where the pension scheme is established, not the State of residence of the recipient. A UK national who has moved to the United States and takes a lump sum from a UK registered pension scheme would, under this paragraph, be taxed on that lump sum in the United Kingdom rather than in the United States.

However, paragraph 2 is not listed among the provisions preserved from the saving clause in Article 1(5)(a). This means that for U.S. citizens and green card holders, the United States may still assert taxing rights over the lump sum under domestic law notwithstanding the paragraph 2 source-State allocation. This is one of the most contested areas of the treaty for UK expats in the United States, and it cannot be resolved by reading Article 17 in isolation, the interaction with the saving clause is determinative.

Paragraph 3 — Social Security

Article 17, paragraph 3 provides that:

• Notwithstanding the provisions of paragraph 1 of this Article, payments made by a Contracting State under the provisions of the social security or similar legislation of that State to a resident of the other Contracting State shall be taxable only in that other State.

UK State Pension payments received by a U.S. resident are therefore taxable only in the United States, not in the United Kingdom, under this paragraph. This provision survives the saving clause under Article 1(5)(a).

Paragraph 4 — Annuities

Article 17, paragraph 4 provides that:

• Any annuity derived and beneficially owned by an individual ('the annuitant') who is a resident of a Contracting State shall be taxable only in that State. The term 'annuity' as used in this paragraph means a stated sum paid periodically at stated times during the life of the annuitant, or during a specified or ascertainable period of time, under an obligation to make the payments in return for adequate and full consideration (other than in return for services rendered).

The residence-based rule applies to annuities, and the definition is specific: to qualify as an annuity under the treaty, the payments must be made in return for adequate and full consideration that is not services rendered. Payments that do not meet this definition may fall under other provisions of Article 17 or under Article 22 (Other Income).

Paragraph 5 — Alimony and Child Support

Article 17, paragraph 5 provides that:

• Periodic payments, made pursuant to a written separation agreement or a decree of divorce, separate maintenance, or compulsory support, including payments for the support of a child, paid by a resident of a Contracting State to a resident of the other Contracting State, shall be exempt from tax in both Contracting States, except that, if the payer is entitled to relief from tax for such payments in the first-mentioned State, such payments shall be taxable only in the other State.

This provision survives the saving clause under Article 1(5)(a). The default outcome is full exemption in both States. The exception applies where the payer receives a deduction or relief in their State of residence, in which case the payments become taxable only in the recipient's State.

5. Article 18: Pension Schemes

Paragraph 1 — Deferral of Tax on Pension Scheme Income

Article 18, paragraph 1 provides that:

• Where an individual who is a resident of a Contracting State is a member or beneficiary of, or participant in, a pension scheme established in the other Contracting State, income earned by the pension scheme may be taxed as income of that individual only when, and, subject to paragraphs 1 and 2 of Article 17 (Pensions, Social Security, Annuities, Alimony, and Child Support) of this Convention, to the extent that, it is paid to, or for the benefit of, that individual from the pension scheme (and not transferred to another pension scheme).

This provision survives the saving clause under Article 1(5)(a). A U.S. resident who is a member of a UK pension scheme is therefore not taxed on investment returns and contributions accruing within the scheme year by year. Tax is deferred until distributions are made, at which point Article 17 governs the treatment of those distributions.

Paragraph 2 — Cross-Border Relief for Contributions

Article 18, paragraph 2 addresses individuals who are members of a pension scheme in one State but exercise employment or self-employment in the other. It provides that:

• Where an individual who is a member or beneficiary of, or participant in, a pension scheme established in a Contracting State exercises an employment or self-employment in the other Contracting State: a) contributions paid by or on behalf of that individual to the pension scheme during the period that he exercises an employment or self-employment in the other State shall be deductible (or excludable) in computing his taxable income in that other State; and b) any benefits accrued under the pension scheme, or contributions made to the pension scheme by or on behalf of the individual's employer, during that period shall not be treated as part of the employee's taxable income and any such contributions shall be allowed as a deduction in computing the business profits of his employer in that other State.

The reliefs cannot exceed what the other State would allow its own residents for contributions to a domestic pension scheme.

Article 18, paragraph 3 conditions the availability of these reliefs, stating that paragraph 2 does not apply unless two requirements are satisfied. First, contributions must have been made before the individual began to exercise employment or self-employment in the other State, or the scheme must be a successor to one to which such contributions were previously made. Second, the competent authority of the other State must have agreed that the pension scheme generally corresponds to a pension scheme established in that State.

Critically, as confirmed by Article 1(5)(b), paragraph 2 of Article 18 is preserved from the saving clause only for individuals who are neither citizens of nor admitted for permanent residence in the State in question. A UK national who holds a U.S. green card and participates in a UK pension scheme cannot rely on Article 18, paragraph 2 to make contributions deductible for U.S. purposes.

Paragraph 4 — Remittance Basis Interaction

Article 18, paragraph 4 addresses the interaction between pension contribution relief and the UK remittance basis of taxation, providing that where contributions to a pension scheme are deductible in a Contracting State and, under the laws of that State, the individual is subject to tax only on the amount of income remitted to or received in that State rather than on the full amount, the relief available under paragraph 2 is reduced proportionally. The relief is scaled down to the same proportion as the income on which the individual is actually taxed bears to the income on which they would be taxed if subject to tax on the full amount.

Paragraph 5 — U.S. Citizens in the United Kingdom

Article 18, paragraph 5 contains a specific provision for U.S. citizens resident in the United Kingdom who exercise employment in the United Kingdom and participate in a UK pension scheme. Sub-paragraph (a) provides that:

• Where a citizen of the United States who is a resident of the United Kingdom exercises an employment in the United Kingdom the income from which is taxable in the United Kingdom and is borne by an employer who is a resident of the United Kingdom or by a permanent establishment situated in the United Kingdom, and the individual is a member or beneficiary of, or participant in, a pension scheme established in the United Kingdom, (i) contributions paid by or on behalf of that individual to the pension scheme during the period that he exercises the employment in the United Kingdom, and that are attributable to the employment, shall be deductible (or excludable) in computing his taxable income in the United States; and (ii) any benefits accrued under the pension scheme, or contributions made to the pension scheme by or on behalf of the individual's employer, during that period, and that are attributable to the employment, shall not be treated as part of the employee's taxable income in computing his taxable income in the United States.

Sub-paragraph (b) limits these reliefs to what the United States would allow for contributions to a generally corresponding U.S. pension scheme. Sub-paragraph (c) provides that contributions to or benefits accrued under a UK pension scheme are treated as contributions or benefits under a generally corresponding U.S. scheme for the purpose of determining the individual's eligibility to participate in and receive tax benefits from a U.S. scheme, to the extent reliefs are available under paragraph 5. Sub-paragraph (d) conditions the entire paragraph on the competent authority of the United States having agreed that the UK pension scheme generally corresponds to a U.S. pension scheme. The relief applies only to the extent that contributions or benefits qualify for tax relief in the United Kingdom.

6. Relief from Double Taxation: Article 24

Article 24 provides the bilateral credit mechanism and survives the saving clause in full under Article 1(5)(a). Article 24, paragraph 1 sets out the U.S. obligation:

• In accordance with the provisions and subject to the limitations of the law of the United States (as it may be amended from time to time without changing the general principle hereof), the United States shall allow to a resident or citizen of the United States as a credit against the United States tax on income a) the income tax paid or accrued to the United Kingdom by or on behalf of such citizen or resident; and b) in the case of a United States company owning at least 10 per cent. of the voting stock of a company that is a resident of the United Kingdom and from which the United States company receives dividends, the income tax paid or accrued to the United Kingdom by or on behalf of the payer with respect to the profits out of which the dividends are paid.

Article 24, paragraph 2 addresses sourcing for credit purposes. It provides that income derived by a U.S. resident that may be taxed in the United Kingdom under the Convention shall be deemed to be income from sources in the United Kingdom for purposes of computing the foreign tax credit. An exception applies to gains that may be taxed in the United Kingdom by reason only of the six-year lookback in Article 13, paragraph 6 — such gains are deemed to arise in the United States.

Article 24, paragraph 4 sets out the UK side of the credit. It provides that, subject to the provisions of UK law regarding the allowance of credit for foreign tax, United States tax payable under the laws of the United States and in accordance with the Convention on profits, income or chargeable gains from sources within the United States shall be allowed as a credit against UK tax computed by reference to the same profits, income or gains.

Article 24, paragraph 6 addresses a specific and important situation: where the United States taxes a U.S. citizen or former citizen or long-term resident who is a resident of the United Kingdom, the paragraph establishes a coordinated credit mechanism. The United Kingdom takes into account only the amount of U.S. tax that the United States may impose under the Convention on a UK resident who is not a U.S. citizen. The United States in turn allows credit for the UK tax remaining after that computation. Sub-paragraph (d) provides that, for the exclusive purpose of relieving double taxation under this mechanism, the relevant income shall be deemed to arise in the United Kingdom to the extent necessary to avoid double taxation. The design of paragraph 6 ensures that the tax burden on a U.S. citizen resident in the UK does not exceed what would apply to an equivalent person who is not subject to U.S. citizenship-based taxation.

7. Limitation on Benefits: Article 23

Article 23, paragraph 1 provides that a resident of a Contracting State that derives income, profits or gains from the other Contracting State is entitled to all the benefits of the Convention accorded to residents of a Contracting State only if that resident is a qualified person as defined in paragraph 2 of the Article and satisfies any other specified conditions.

Article 23, paragraph 2 defines qualified persons. The definition includes: individuals (who qualify in all cases); qualified governmental entities; companies whose principal class of shares is listed and regularly traded on a recognised stock exchange; companies at least 50 percent owned by five or fewer listed companies; persons other than individuals or companies where at least 50 percent of the beneficial interests are held by listed entities; pension schemes, employee benefit plans, and non-profit organisations described in Article 4, paragraph 3, provided that more than 50 percent of the beneficiaries, members or participants are residents of either Contracting State; and certain broadly held entities where on at least half the days of the taxable period at least 50 percent of the aggregate voting power and value is owned by qualified persons, and less than 50 percent of the entity's gross income is paid to non-residents in deductible form.

Article 23, paragraph 4(a) provides an active trade or business route to benefits for entities that are not qualified persons:

• Notwithstanding that a resident of a Contracting State may not be a qualified person, it shall be entitled to the benefits of this Convention with respect to an item of income, profit or gain derived from the other Contracting State, if the resident is engaged in the active conduct of a trade or business in the first-mentioned State (other than the business of making or managing investments for the resident's own account, unless these activities are banking, insurance or securities activities carried on by a bank, insurance company or registered securities dealer), the income, profit or gain derived from the other Contracting State is derived in connection with, or is incidental to, that trade or business and that resident satisfies any other specified conditions for the obtaining of such benefits.

Article 23, paragraph 6 reserves a discretionary route to benefits: where a resident is neither a qualified person nor entitled to benefits under paragraphs 3 or 4, the competent authority of the other State may nonetheless grant benefits if the establishment, acquisition, or maintenance of the resident and the conduct of its operations did not have obtaining treaty benefits as one of its principal purposes.

The term conduit arrangement is defined in Article 3, paragraph 1(n) as a transaction or series of transactions structured so that a treaty-eligible resident of a Contracting State receives income from the other State but pays all or substantially all of that income to a third person who is not a resident of either State and who would not have been entitled to equivalent benefits had it received the income directly, where one of the main purposes of the arrangement is obtaining such increased benefits as are available under the Convention.

8. Mutual Agreement Procedure: Article 26

Article 26, paragraph 1 sets out the right of taxpayers to invoke the Mutual Agreement Procedure:

• Where a person considers that the actions of one or both of the Contracting States result or will result for him in taxation not in accordance with the provisions of this Convention, he may, irrespective of the remedies provided by the domestic law of those States, present his case to the competent authority of the Contracting State of which he is a resident or national. The case must be presented within three years from the first notification of the action resulting in taxation not in accordance with the provisions of this Convention or, if later, within six years from the end of the taxable year or chargeable period in respect of which that taxation is imposed or proposed.

Article 26, paragraph 2 requires the competent authority to endeavour, if the objection appears justified and it cannot resolve the matter unilaterally, to reach agreement with the competent authority of the other State. Any agreement reached is implemented notwithstanding any domestic time limits or procedural limitations, except those that apply for the purpose of giving effect to such an agreement.

Article 26, paragraph 3 sets out a non-exhaustive list of matters the competent authorities may agree upon, including the same attribution of income and deductions to permanent establishments, the same allocation of income between persons, the same characterisation of particular items of income, the same characterisation of persons, the same application of source rules, a common meaning of a term, and the application of domestic penalty provisions in a manner consistent with the Convention's purposes.

9. U.S. Reporting Obligations: The Treaty Does Not Suspend Information Filing

The treaty relieves double taxation on income. It does not modify or suspend U.S. domestic information reporting obligations. This distinction is significant for UK nationals who become U.S. residents while retaining UK financial interests.

Form 5471

U.S. citizens and residents with certain ownership interests in foreign corporations are required to file Form 5471, Information Return of U.S. Persons with Respect to Certain Foreign Corporations. This obligation arises under the Internal Revenue Code and is not affected by the treaty. A UK national who owns or controls a UK limited company and subsequently becomes a U.S. resident will typically be subject to this requirement, regardless of whether any taxable income arises from that company in a given year.

Form 8833 and Treaty-Based Position Disclosure

IRS Publication 901 (Rev. September 2024) confirms that where a taxpayer takes the position that any U.S. tax is overruled or otherwise reduced by a U.S. treaty, that position must generally be disclosed on Form 8833, Treaty-Based Return Position Disclosure Under Section 6114 or 7701(b), attached to the relevant return. Publication 901 notes that the filing requirement does not apply to a reduced rate of withholding on non-effectively connected income such as dividends, interest, rents, or royalties, or to a reduced rate of tax on pay received for services as an employee including pensions and annuities. However, more specific treaty positions — such as reliance on the particular paragraphs of Article 17 or Article 18 that survive the saving clause, will in most cases require Form 8833 disclosure. Failure to file where required may result in a $1,000 penalty for individuals or $10,000 per failure for corporations.

10. Entry into Force and Termination

Article 29, paragraph 2 sets out the effect dates of the Convention. In the United States, it has effect from the first day of the second month following the exchange of instruments of ratification for taxes withheld at source, and from 1 January of the following calendar year for all other U.S. taxes. In the United Kingdom, it has effect from 6 April of the following year for income tax and capital gains tax, from 1 April for corporation tax, from the same second-month date for taxes withheld at source, and from 1 January of the following year for petroleum revenue tax.

Article 29, paragraph 3 confirms that the prior Convention signed 31 December 1975 ceased to have effect in relation to any tax from the date this Convention had effect in relation to that tax. It also provides that where a person entitled to benefits under the prior Convention would have been entitled to greater benefits than under the 2001 Convention, that person may elect to have the prior Convention continue to apply in its entirety for a twelve-month period from the effective date of the new Convention.

Article 30 governs termination. It provides that either Contracting State may terminate the Convention by giving notice through diplomatic channels. Following such notice, the Convention ceases to have effect six months later for taxes withheld at source, and for other taxes from the beginning of the first taxable or chargeable period that starts at least six months after the notice.

11. Practical Implications for UK Expats

The U.S.–UK Tax Treaty does not eliminate the complexity faced by UK nationals who move to the United States. What it provides is a bilateral framework within which double taxation can be relieved, pension scheme recognition can be maintained under defined conditions, residency disputes can be resolved through a structured tie-breaker, and disputes about treaty application can be escalated through a formal competent authority procedure.

The saving clause in Article 1, paragraph 4 means that U.S. citizens and green card holders cannot use the treaty to exempt UK-source income from U.S. tax as a general matter. The operative relief mechanism for most U.S. residents with UK income is the foreign tax credit under Article 24, not treaty exemptions.

For pension planning, the key analytical step is to identify which specific paragraph of Article 17 or Article 18 applies to the payment in question, and then to determine whether that paragraph appears in the list of provisions preserved from the saving clause under Article 1(5)(a) or 1(5)(b). Article 17, paragraph 1(a), the general residence-based rule for periodic pension income, is not itself listed in Article 1(5)(a). Only sub-paragraph (b) of paragraph 1, and paragraphs 3 and 5, are expressly preserved. Article 17, paragraph 2, which allocates taxing rights over lump sums to the source State, is not preserved, meaning the United States may tax lump-sum distributions from a UK pension scheme received by a U.S. resident or citizen under domestic law.

Article 18, paragraph 1, the deferral provision ensuring pension scheme income is not taxed until distributed, survives the saving clause and is available to U.S. residents. Article 18, paragraph 2, the cross-border contribution relief, does not survive the saving clause for U.S. citizens and green card holders.

Reporting obligations under the Internal Revenue Code, including Form 5471 for ownership interests in UK companies and Form 8833 for treaty-based return positions, apply independently of the treaty and are not relieved by it.

Given the precision required to apply this treaty correctly, particularly the interaction between the saving clause and the pension articles, UK expats should work from the primary source documents and obtain specialist cross-border tax advice before taking treaty-based positions on either a U.S. or UK return.

References

Convention Between the Government of the United States of America and the Government of the United Kingdom of Great Britain and Northern Ireland for the Avoidance of Double Taxation and the Prevention of Fiscal Evasion with Respect to Taxes on Income and on Capital Gains, signed 24 July 2001. U.S. Department of the Treasury.

IRS Publication 901, U.S. Tax Treaties (Rev. September 2024). Internal Revenue Service.

UK/USA Double Taxation Convention (consolidated version incorporating 2002 amending protocol). HM Revenue & Customs, GOV.UK.

HMRC International Manual (INTM). HM Revenue & Customs, GOV.UK.

Our UK Expats in US Series

UK Citizens Moving to the U.S.: Tax Issues to Understand Before You Arrive
ISAs and UK Investments Under U.S. Tax: What Stops Being Tax-Free
Selling UK Property After Moving to the U.S.: Capital Gains and Timing Risks
US–UK Tax Treaty Explained: Dual Residency, Pensions, and Cross-Border Tax Planning for UK Expats

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