Introduction: Why Alimony Crosses the Atlantic Untaxed
Cross-border alimony is one of the few payments the US-UK treaty can leave untaxed in both countries, yet almost nobody claims the relief correctly. The provision has sat in Article 17(5) since 2001. However, the American reform that took effect in 2019 quietly inverted how it operates, and most published guidance still describes the pre-reform world.
We see the consequences at TaxYork whenever a City divorce crosses the Atlantic. Furthermore, the sums involved are rarely small. A senior banker paying six figures a year in spousal maintenance can gain or lose tens of thousands annually depending on a single date on the court order.
The stakes are asymmetric in an unusual way. Specifically, a pre-2019 order can produce a full American deduction with no corresponding charge anywhere in the world. Meanwhile, modifying that same order can destroy the benefit permanently. Therefore, the date the instrument was executed matters more than almost any other fact.
What Counts as Alimony Under American Law
Not every payment to a former spouse qualifies. The IRS conditions require cash payments made under a divorce or separation instrument, with the spouses filing separately and living apart. Additionally, the obligation must end on the recipient's death.
Payments designated as child support never qualify. Similarly, non-cash property settlements fall outside the definition, whether paid as a lump sum or by instalments. Furthermore, voluntary payments made outside any instrument are ignored entirely.
That last point catches generous payers. Accordingly, an informal arrangement agreed between solicitors but never embodied in an order achieves nothing for tax purposes.
Why the 2019 Change Rewrote the Treaty Outcome
Before 2019, American law let the payer deduct alimony and taxed the recipient on it. Consequently, the treaty's exception applied, and the payments became taxable only in the recipient's country. That was the settled analysis for decades.
The Tax Cuts and Jobs Act repealed both halves for instruments executed after 2018. Therefore, the payer now gets nothing and the recipient includes nothing. Notably, that change removes the very condition the treaty exception depends upon, which flips the result back to the general rule.
Almost no published commentary has worked this through. Indeed, the most widely cited page quoting Article 17(5) was written in 2014 and predates the reform entirely.
How America Taxes Alimony After the 2019 Reform
America now applies two parallel regimes divided by a single date. Specifically, instruments executed after 2018 produce no deduction and no inclusion. Meanwhile, instruments executed before 2019 remain under the old rules indefinitely.
Publication 504 governs both populations. Furthermore, the grandfathering is genuinely permanent rather than transitional, which is unusual in American tax legislation.
The Pre-2019 Rule and Who Still Lives Under It
Under the grandfathered regime, the payer deducts the alimony above the line and the recipient reports it as income. Consequently, the deduction reduces adjusted gross income directly, which also improves eligibility for other reliefs.
The former sections 71 and 215 of the code supplied that treatment. Notably, section 215 and section 71 both now carry the post-2018 repeal, though they continue to apply to older instruments.
Many high-value London divorces settled between 2014 and 2018 still run under these rules. Therefore, a substantial population of American payers in Britain retains a deduction their newly divorced colleagues cannot access.
Modified Agreements and the Express Election
Grandfathering survives ordinary variation. However, it ends where a modification executed after 2018 expressly states that the repeal applies to the modification. Accordingly, the opt-in must be deliberate and written.
That wording appears more often than you would expect. Specifically, American matrimonial templates updated after the reform sometimes carry the language as boilerplate. Consequently, a routine variation to increase payments can silently surrender a deduction worth tens of thousands each year.
We review the variation wording before it is sealed wherever a client's order predates 2019. Furthermore, the point is easily missed by advisers on either side of the Atlantic, because the clause looks administrative.
The Seven Conditions a Payment Must Meet
The statutory conditions remain relevant to grandfathered orders. Importantly, the payment must be cash, made under the instrument, and between spouses who do not share a household once legally separated. Additionally, no liability may survive the recipient's death.
The instrument must also avoid designating the payments as non-deductible. Therefore, a clause stating that maintenance is not taxable to the recipient defeats the deduction even where every other condition is satisfied.
Mixed orders demand particular care. Specifically, any amount that reduces on a child-related contingency is recharacterised as child support and loses alimony treatment.
How Britain Taxes Spousal Maintenance
Britain takes the simplest possible approach. Maintenance payments attract no deduction for the payer and no charge on the recipient. Consequently, spousal maintenance is effectively outside the British income tax system altogether.
That simplicity is precisely what makes the cross-border analysis surprising. Furthermore, it means the British leg of any treaty computation usually contributes nothing.
No Deduction and No Charge
A UK-resident payer receives no relief for maintenance under general principles. Similarly, a UK-resident recipient reports nothing on a Self Assessment return. Therefore, neither party has a British filing obligation arising from the payments themselves.
HMRC's own coding guidance at PAYE10055 reflects this position. Notably, the manual deals with maintenance only in the narrow context of the surviving relief described below.
This creates the condition the treaty cares about. Specifically, a UK-resident payer is not entitled to relief, which keeps the exception in Article 17(5) switched off.
The Relief That Survives for Couples Born Before 1935
One narrow relief remains. Under the income tax reliefs framework, Maintenance Payments Relief applies where one or both former spouses were born before 6 April 1935. Additionally, the payments must be made under a court order and the recipient must not have remarried.
The relief is modest. For 2026 to 2027 it reduces the tax bill by the lower of £436 or ten per cent of the payments made, with the cap reached at £4,360 annually. The statutory basis sits in Part 8, Chapter 5 of the Income Tax Act 2007.
The date condition now excludes almost everyone, since it requires a former spouse aged over ninety. Nevertheless, the relief matters enormously to the treaty analysis, because entitlement to it changes which country may tax the payments.
Treaty Article 17(5): The Rule That Exempts Alimony in Both Countries
Article 17(5) of the US-UK treaty deals expressly with alimony, separate maintenance and child support. Consequently, cross-border payments are governed by a specific rule rather than by general principles. The article is titled Pensions, Social Security, Annuities, Alimony, and Child Support.
The treaty text published by the US Treasury sets out the operative wording. Importantly, the provision covers periodic payments only, which excludes lump sums entirely.
What the Article Actually Says
The article provides that periodic payments made under a written separation agreement or a decree of divorce, separate maintenance or compulsory support, paid by a resident of one State to a resident of the other, are exempt from tax in both Contracting States. Furthermore, the exemption expressly extends to payments for the support of a child.
An exception then follows. Specifically, where the payer is entitled to relief from tax for the payments in their own country, the payments become taxable only in the other country.
Two conditions therefore govern everything. Firstly, the payer and recipient must be resident in different Contracting States. Secondly, the outcome turns on whether the payer's country grants relief.
Why the Savings Clause Does Not Override It
American treaty benefits are usually neutralised by the savings clause, which lets the United States tax its citizens as though the treaty did not exist. However, the 2002 Protocol replaced the original list of exceptions. Notably, Article 17(5) sits among the carve-outs that survive the savings clause.
That detail is decisive. Consequently, an American citizen resident in Britain, or an American citizen receiving alimony while living abroad, can rely on Article 17(5) despite their citizenship. Most treaty positions fail at exactly this hurdle.
We stress the point because the general rule runs the other way. Therefore, assuming the savings clause defeats the claim, as it does for many pension provisions, produces the wrong answer here.
The "Entitled to Relief" Proviso and How the TCJA Flipped It
Work the proviso through both regimes and the modern outcomes emerge clearly. Where a post-2018 instrument governs, the American payer receives no deduction. Consequently, nobody is entitled to relief, and the payments are exempt in both countries under the general rule.
Where a pre-2019 instrument governs and the payer is American, the position differs sharply. Specifically, that payer is entitled to relief, so the exception applies and the payments are taxable only in Britain. However, Britain imposes no charge on maintenance receipts at all.
The result is striking. Accordingly, a grandfathered American payer deducts the alimony in full while the recipient pays tax on it nowhere in the world. That outcome is a direct consequence of the treaty meeting two very different domestic systems.
Where the payer is UK resident, the analysis is simpler. Notably, Britain grants no relief in virtually every case, so the payments are exempt in both countries regardless of when the order was made.
The Withholding Trap on Alimony Paid to a Non-Resident
Treaty exemption does not switch off withholding automatically. Consequently, an American payer sending alimony to a former spouse in London faces a collection obligation that surprises almost everyone. This is the most common cash-flow failure we correct.
Thirty Per Cent at Source Under Section 1441
American-source alimony paid to a non-resident is fixed, determinable, annual or periodical income. Therefore, section 1441 requires the payer to withhold thirty per cent of the gross amount. Additionally, the IRS confirms that such payments are reportable at any amount, with no de minimis threshold.
The payer becomes the withholding agent personally. Furthermore, NRA withholding rules make that agent liable for tax they failed to deduct. Accordingly, an ex-spouse who simply transfers the full sum each month carries the exposure themselves.
Form W-8BEN and the 1042-S Paper Trail
The recipient stops the deduction by certifying entitlement to treaty relief. Specifically, they provide Form W-8BEN to the payer, citing the alimony article. Guidance on claiming treaty benefits sets out the mechanics.
Reporting continues even where the entire payment is exempt. Consequently, the payer must still file Form 1042-S annually. Where withholding happened wrongly, the recipient reclaims it by filing a US non-resident return rather than by asking the payer for a refund.
Disclosing the Treaty Position on Form 8833
A treaty position that overrides domestic law generally requires disclosure. Therefore, claiming exemption on alimony that domestic rules would otherwise tax brings a filing duty with it.
When Disclosure Is Mandatory
Section 6114 requires a taxpayer to disclose any return position that a treaty overrules or modifies. Consequently, Form 8833 accompanies the return where the treaty changes the outcome.
Post-2018 instruments rarely need it, because domestic law already exempts the recipient. However, a grandfathered instrument does need it, since domestic law would otherwise tax the recipient in full.
The Penalty for Silence
The penalty for failing to disclose is one thousand dollars for an individual per position per year. Furthermore, the charge applies even where the treaty claim itself is entirely correct. Accordingly, the cost of omitting a form is wholly avoidable.
We file the disclosure whenever the claim is load-bearing. Additionally, a clear disclosure record shortens any subsequent enquiry considerably.
An Alimony Case Study With Real Numbers
The following reflects a composite of client engagements. All figures are annual and expressed in dollars.
The Position
James is an American citizen and a former hedge fund partner living in New York. His divorce was finalised in March 2016, comfortably within the grandfathered regime. Under the decree he pays one hundred and eighty thousand dollars a year in spousal maintenance to Elena.
Elena is also an American citizen. However, she relocated to London in 2020 and is now UK resident. Consequently, the payments run from a resident of one Contracting State to a resident of the other, which brings Article 17(5) into play.
The Numbers
James deducts the full one hundred and eighty thousand dollars, because his pre-2019 instrument survives the repeal. At a thirty-seven per cent marginal rate, that deduction saves him sixty-six thousand six hundred dollars each year.
Elena's position follows directly from his. Specifically, James is entitled to relief in his own country, so the treaty exception applies and the payments are taxable only in Britain. Meanwhile, Britain imposes no charge on maintenance receipts whatsoever.
Her American citizenship would normally defeat the claim. Nevertheless, Article 17(5) is carved out of the savings clause by the 2002 Protocol, so she may rely on it. Therefore, Elena pays nothing on the alimony in either country.
The Outcome
The household saves sixty-six thousand six hundred dollars annually with no offsetting charge anywhere. Over the ten-year term of the order that exceeds six hundred and sixty thousand dollars.
One further correction mattered. James had been withholding nothing, despite paying American-source alimony to a non-resident. Consequently, we arranged a Form W-8BEN from Elena and put the annual Form 1042-S reporting on a proper footing, removing his personal exposure as withholding agent.
We also flagged a live risk. Specifically, James was negotiating an upward variation, and the draft carried standard post-reform wording adopting the repeal. Had he signed it, the sixty-six thousand six hundred dollar annual deduction would have vanished permanently. Accordingly, the clause was removed before sealing.
Where Alimony Planning Goes Wrong
Two recurring errors account for most of the damage we see. Furthermore, both stem from treating a foreign order as though it were domestic.
Lump Sums and Property Settlements
Article 17(5) covers periodic payments only. Therefore, a capitalised clean-break settlement falls outside it entirely. Consequently, the treaty offers no protection to the lump sums that dominate large London divorces.
Those transfers are analysed under different rules altogether. Additionally, a capital sum paid in instalments does not become periodic merely because it arrives monthly.
Child Support and Mixed Orders
Child support is exempt in both countries under the same article, which removes most of the difficulty. However, mixed orders create traps. Specifically, any amount that falls away when a child reaches a given age is treated as child support for American purposes.
That recharacterisation can retrospectively reduce a grandfathered deduction. Therefore, orders should separate the two elements explicitly rather than expressing a single global figure.
How TaxYork Can Help
We prepare American and British returns together, which is the only way a cross-border alimony position holds up. Specifically, we establish which regime governs the instrument, apply Article 17(5) correctly, and file the disclosure the claim requires.
Our work covers the whole chain. Furthermore, we handle the withholding side, prepare Forms W-8BEN and 1042-S, reclaim tax withheld in error, and review variation wording before an order is sealed. We also rebuild historic years where the treaty position was never claimed.
Our team works exclusively with Americans in Britain and dual filers. Accordingly, you can review our cross-border tax planning and compliance service, our US tax return preparation or the full range of US personal tax services.
Conclusion
Cross-border alimony sits in a genuinely unusual position. Britain taxes maintenance receipts at nothing, while America now taxes them at nothing under post-2018 instruments. Consequently, Article 17(5) frequently exempts the payments in both countries at once.
The grandfathered population enjoys something better still. Specifically, an American payer under a pre-2019 order deducts in full while the recipient bears no charge anywhere, provided the treaty position is claimed and disclosed properly.
Two practical rules follow. Firstly, never modify a pre-2019 order without checking whether the wording adopts the repeal. Secondly, deal with withholding before the first payment crosses the Atlantic rather than reclaiming it afterwards.
Contact Us
If you pay or receive alimony across the US-UK border, we can establish your position and prepare both returns correctly. Please contact us to discuss your circumstances with a specialist.
Email hello@taxyork.com or telephone 020 3488 8606. Alternatively, book a consultation at a time that suits you. General guidance is also published by HM Revenue and Customs, and impartial background on separation and money is available from MoneyHelper.
Disclaimer
This article provides general information about the taxation of alimony and spousal maintenance for individuals connected with both the United States and the United Kingdom. It does not constitute tax or legal advice and should not be relied upon in making decisions about your own circumstances. Treaty positions depend on residence, citizenship, the date of the instrument and its precise wording. Accordingly, you should obtain professional advice before acting. TaxYork accepts no liability for any loss arising from reliance on this material.