Divorce and Separation Across Borders: The UK Tax Rules That Decide Who Pays What

Transfers between spouses and civil partners who live together have always been at no gain no loss: the recipient takes over the asset at the transferor's base cost and no CGT arises on the transfer. Before 2023 that treatment stopped at the end of the tax year of separation. For disposals on or after 6 April 2023 the rules were rewritten (CG22420, HMRC).

The current position, confirmed in HMRC's helpsheet HS281, is that separating spouses and civil partners can transfer assets at no gain no loss any time up to the earlier of the end of the third tax year after the one in which they ceased to live together, and the date on which a court grants the divorce or annulment (HS281, GOV.UK). Separate in November 2026, in the 2026/27 tax year, and the window runs to 5 April 2030 unless the final order lands first.

On top of that sits the rule that matters most in practice: transfers made in accordance with a formal divorce or separation agreement or court order are at no gain no loss without any time limit. A settlement embodied in a consent order can move assets years after the divorce with no CGT on the transfer.

No gain no loss does not mean the gain disappears: the receiving spouse inherits the original base cost, so the tax is deferred until they sell. In a cross-border divorce that deferral is where the planning lives: which spouse ends up holding which asset, and where they are resident when they sell, can change the eventual bill dramatically.

Miss both windows and the transfer is treated as made at market value, whatever actually changed hands, so the transferring spouse can make a chargeable gain on an asset they gave away for nothing (HS281, GOV.UK). HMRC's manual adds that the parties remain connected persons under section 286 until the final order (CG22420, HMRC).

The practical lesson is simple: paper the settlement properly. A transfer under a formal agreement or consent order is protected indefinitely; the same transfer made informally after the third tax year is a disposal at market value. Where a family company, a portfolio or a second property is moving, the difference between those routes can be the whole CGT bill. Our guide to CGT on gifts and family transfers covers the market value rule in more depth.

The family home is usually the largest asset. The spouse who stays put is straightforward: the home remains their main residence and Private Residence Relief keeps accruing. The spouse who moves out is the one who needs the rules.

The baseline: the departing spouse is entitled to Private Residence Relief for the time before they moved out when the house was their only or main residence, plus the final 9 months of ownership, whatever happens in between (HS281, GOV.UK). A sale or transfer within 9 months of moving out is normally fully covered; the mechanics are in our full guide to Private Residence Relief.

Divorces rarely resolve in 9 months. Where the departing spouse transfers their interest to the ex years later, two protections can apply. First, since 6 April 2023 the transfer itself will normally be at no gain no loss under the rules above (CG65356, HMRC). Second, where relief is needed instead, section 225B TCGA 1992 can treat the home as the departing spouse's main residence from the date they left until the transfer, provided the transfer is under a formal divorce or separation agreement or court order, the home remained the other spouse's main residence throughout, and no other property has been nominated as the departing spouse's main residence for that period.

That last condition is the election the leaving party has to think hard about. A section 225B claim buys full relief on the old marital home at the price of relief on the new one: you cannot have two main residences for the same period, and HMRC's manual notes expressly that the claim may disadvantage someone who has bought a replacement home (CG65356, HMRC). Whether to claim depends on which property carries the bigger gain over the overlap period, which is a calculation, not a guess.

Cross-border divorces often start with one spouse already living abroad, or leaving mid-proceedings. Residence is set by the Statutory Residence Test. Once a spouse is non-resident, three UK property rules bite.

First, scope. Non-residents remain within UK CGT on disposals of UK property and land, and for residential property a non-resident generally pays tax only on the gain made since 5 April 2015 (GOV.UK). That rebasing can substantially cut the taxable gain on a long-held marital home; see our guide to CGT for non-residents on UK property.

Second, reporting. A non-resident must report all sales and disposals of UK property or land to HMRC within 60 days of completion, even if there is no tax to pay (GOV.UK). It is far wider than the UK-resident version and catches divorce transfers: a non-resident spouse transferring their share of the marital home should assume a 60-day return is needed even where no gain no loss treatment means the tax is nil. The full regime is in our guide to 60-day CGT reporting for non-residents.

Third, Private Residence Relief itself tightens. For a tax year in which you are non-resident, relief on a UK home generally requires you, your spouse or civil partner to have spent at least 90 days in the property that year, and the home must be nominated as your main home when the disposal is reported (GOV.UK). A spouse who has genuinely relocated abroad will usually fail the 90-day test, which makes the final 9 months rule and the timing of the transfer even more important.

Pensions are often the second biggest asset in the settlement and the least understood. A financial settlement can give one party a share of the other's pension, including the State Pension or private pension plans, and the agreement needs a consent order or financial order to be legally binding (GOV.UK). Under a pension sharing order the member's cash equivalent is reduced by the amount stated in the order, the pension debit, and that amount is allocated to the ex-spouse or former civil partner as pension rights in their own name, the pension credit (PTM029000, HMRC).

The pension credit is not taxable cash on arrival: it is a pension in the recipient's own name, taxed later when benefits are drawn. The cross-border complication is what the receiving ex does next. An ex abroad who wants the money in a local scheme is proposing an overseas pension transfer, and the UK rules are unforgiving: the receiving scheme must be a qualifying recognised overseas pension scheme, or the transfer suffers at least 40% tax, and even a QROPS transfer can attract the 25% overseas transfer charge unless an exclusion applies, such as being resident in the same country as the receiving scheme (GOV.UK).

In outline, then: sharing the pension inside the UK system is tax-neutral at the point of the order, and the danger sits in the follow-on transfer abroad. Anyone weighing that step should read our guide to foreign pensions and QROPS first, because a poorly planned transfer can hand a quarter or more of the pension credit to HMRC.

Maintenance is the easy part. Annual payments made by an individual, which include maintenance on divorce or separation, are not chargeable to income tax in the recipient's hands, and maintenance payments that arise outside the UK are exempt too, provided they would have been exempt had they arisen in the UK (SAIM8070, HMRC). A UK-resident ex receiving maintenance from abroad has no UK income tax to pay on it and nothing to enter on a return for those receipts.

The payer gets no meaningful relief either. Maintenance Payments Relief still exists, but only where one of the couple was born before 6 April 1935, the payments are made under a court order, and the ex has not remarried or entered a new civil partnership; even then it is worth 10% of the maintenance paid, capped at £436 a year (GOV.UK). For almost every couple today, maintenance is simply tax-neutral: paid out of taxed income, received tax free. One caution: the country where the recipient lives applies its own rules, and some jurisdictions do tax maintenance received, so the UK answer is only half the answer.

IHT draws its line in a different place from CGT. For the spouse exemption, spouses include people who are legally married but separated: any transfer between spouses or civil partners on the breakdown of the marriage is covered by the exemption if it is made before the marriage is dissolved by the final order (IHTM11032, HMRC). Right up to that date, assets can pass between you, in life or on death, with no IHT.

The cross-border catch is the cap. From 6 April 2025 the IHT connecting factor changed from domicile to long-term UK residence, and where the transferor is within the UK IHT net but the receiving spouse is not a long-term UK resident, the spouse exemption is limited to the nil rate band that applies at the date of transfer (IHTM11033, HMRC). The nil rate band is £325,000 and the standard IHT rate above it is 40% (GOV.UK). A divorcing couple where one spouse has genuinely emigrated needs to check both sides' status before assets move; how the residence-based system works is covered in our guide to residence-based IHT.

After the final order the parties are simply individuals for IHT, and an outright transfer that is not part of the court-ordered settlement falls under the ordinary gift rules; our guide to the 7 year rule for gifts explains those. The clean answer is to deal with the asset split inside the settlement, and to update wills and pension death benefit nominations on both sides as soon as the separation is real, because the consequences of dying mid-divorce are rarely the ones anyone intended.

In a cross-border separation there is often a genuine choice about where the divorce runs, and that choice belongs to your family lawyer, not your tax adviser. The country whose courts handle the financial settlement shapes what orders are available and how enforceable the outcome is elsewhere. Involve a family lawyer with cross-border experience early, and let the tax advice inform the settlement rather than react to it.

What the tax adviser owns is the timeline, because three dates drive everything in this guide. The tax year in which you stop living together starts the three-year no gain no loss clock. The final order ends both the no gain no loss window for informal transfers and the IHT spouse exemption on the same day. And a formal agreement or court order, once in place, removes the CGT time limit on the transfers it covers. Sequenced well, the tax cost of the split can be close to nil. Sequenced badly, the same asset moves can mean CGT at market value, lost residence relief and penalties on late 60-day returns.

Horizon UK Tax Solutions is a founder-led Chartered Tax Adviser practice with over 10 years' experience, including 7 at a Big Four firm, and cross-border separations sit exactly where we work. We act alongside your family lawyer: they run the proceedings and the settlement, we sequence the transfers inside the no gain no loss windows, calculate the section 225B decision rather than guessing it, file the 60-day returns on time and check the settlement against the overseas transfer charge and the spouse exemption cap. Where one party is a US citizen, the US side is handled by our US partners, Enrolled Agents and CPAs, whom we coordinate for you.

Fees are fixed and agreed upfront: personal tax returns from £350, non-resident and expat returns from £550, and complex returns from £750, with advisory work quoted before we start. If you are separating and one of you is abroad, or heading there, the cheapest time to get the tax right is before the settlement is signed. Start with a free 30-minute clarity call, or read about our UK property tax services and expat tax advice.