Transferring property between spouses or civil partners is a familiar feature of UK property tax planning. For landlords, there are usually a handful of reasons why a transfer is considered: shifting rental income to a spouse who is taxed at a lower rate, making use of the other spouse's annual exempt amount or lower-rate band for Capital Gains Tax (CGT) purposes, or restructuring ownership between both estates so that both nil-rate bands are available on death rather than one being wasted. In practice, these transfers are often loosely described as "tax-free." That description is, at best, incomplete and at worst misleading.
CGT, Stamp Duty Land Tax (SDLT) and Inheritance Tax (IHT) each have their own rules for interspousal transactions, and those rules do not align with one another. A transfer that is entirely neutral for CGT can still give rise to an SDLT charge if mortgage debt is involved. A transfer fully covered by the IHT spouse exemption may still carry an embedded capital gain that will fall squarely on the receiving spouse when the property is later sold. The purpose of this article is to examine each tax in turn, and then to set out how they interact in practice for landlords holding residential investment property.
Capital Gains Tax
The no gain/no loss rule
The starting point for CGT on interspousal transfers is Section 58 of the Taxation of Chargeable Gains Act 1992 ("TCGA 1992"). Where an asset is transferred between spouses or civil partners who are living together, the disposal is treated as having been made for such consideration as would secure that neither a gain nor a loss accrues to the transferor. HMRC's guidance at CG22200 sets out how this operates.
In practical terms, the receiving spouse steps into the transferor's CGT position. The transferee acquires the property with the same base cost the transferor originally paid, including any allowable enhancement expenditure and incidental costs of acquisition. The gain is not wiped out. It is deferred and if the property is later disposed of to a third party, the full accrued gain from the date the transferor originally acquired the property comes into charge in the hands of the receiving spouse.
Ordinarily, a transfer between connected persons is treated as taking place at market value, even if the asset is gifted or transferred for less than full value. However, where section 58 applies, the no gain/no loss rule takes priority. This is an important distinction from the usual connected persons rules. The market value of the property at the date of the interspousal transfer is therefore not used to calculate a chargeable gain at that point. For landlords, this can be a useful planning rule. It allows ownership of an investment property to be reorganised between spouses or civil partners without triggering an immediate CGT charge.
Separation and divorce
The treatment of transfers between spouses or civil partners who have separated has changed materially for disposals on or after 6 April 2023. Before that date, no gain/no loss treatment generally only applied for the remainder of the tax year in which the parties ceased to live together.
From 6 April 2023, no gain/no loss treatment can continue to apply for transfers made up to the earlier of the end of the third tax year after the tax year in which the parties ceased to live together, or the date on which the court grants the final divorce or dissolution order. A final order is the court order that legally brings the marriage or civil partnership to an end.
There is also a separate and important extension where the transfer is made as part of formal separation or divorce arrangements. Transfers made under a formal divorce agreement, separation agreement or court order can qualify for no gain/no loss treatment without being restricted by the three-tax-year time limit. This is particularly relevant where property transfers form part of a financial settlement but are implemented sometime after the parties have separated.
Future reporting position
Although an interspousal transfer on a no gain/no loss basis should not itself give rise to a 60-day UK residential property reporting requirement, the reporting position should not be overlooked entirely. The point is more relevant at the later stage, when the receiving spouse eventually sells the property.
If that later disposal is of UK residential property and CGT are payable, the gain may need to be reported to HMRC within 60 days of completion, with the tax paid within the same period. The receiving spouse should therefore keep clear records of the transferor’s original acquisition cost, enhancement expenditure and other allowable costs, as those figures will be needed to calculate the gain on any future sale.
Example
Mr Akram purchased a buy-to-let flat in 2014 for £150,000. The property is now worth £310,000. He transfers the property to his wife, Mrs Akram, as a gift while the couple are living together. No CGT arises on the transfer. Mrs Akram takes the property with a base cost of £150,000. Three years later, she sells the property for £350,000. At that point, she must report and pay the CGT within 60 days of completion.
Stamp Duty Land Tax
No general spouse exemption
There is no blanket exemption from SDLT for transfers between spouses. Whether SDLT arises depends entirely on whether there is chargeable consideration for the transaction within the meaning of Schedule 4 to the Finance Act 2003 ("FA 2003").
Where a spouse transfers a property to the other as an outright gift, with no outstanding mortgage, no debt being assumed, and no other consideration passing, there is no chargeable consideration. The transaction falls outside the charge to SDLT because there is simply nothing on which to calculate the tax.
Mortgage debt as chargeable consideration
The position changes fundamentally where the property carries an outstanding mortgage. Where a purchaser assumes existing debt secured on the property, that debt constitutes chargeable consideration for SDLT purposes. If debt is secured on the property both immediately before and immediately after the transaction, and the rights or liabilities of any party in relation to that debt change as a result of the transaction, there is an assumption of debt by the purchaser.
This means that if the receiving spouse takes on all or part of the outstanding mortgage, the SDLT charge is calculated on the amount of debt assumed. It is not calculated on the market value of the property. This is the most common source of unexpected SDLT charges on interspousal transfers, and it is routinely overlooked.
HMRC's guidance at SDLTM04040 confirms that when determining the amount of debt assumed, each person's liability for the debt is taken to be a proportion of the debt corresponding to their share of the property. So, for example, where a property with a £200,000 mortgage is transferred into joint names with the receiving spouse taking a 50% share, the chargeable consideration is £100,000. Where the whole property is transferred and the receiving spouse assumes the entire mortgage, the full £200,000 is chargeable consideration.
The higher rates for additional dwellings do not apply
The higher rates for additional dwellings do not apply to a transfer between spouses or civil partners who are living together.
Paragraph 9A (1) of Schedule 4ZA of the FA 2003 provides that a chargeable transaction is not a higher rates transaction if there is only one purchaser, only one vendor, and on the effective date of the transaction the two of them are married to, or civil partners of, each other and living together. This is a direct carve-out. It means that where one spouse transfers a buy-to-let property to the other, and the couple are living together at the effective date, the five-percentage point surcharge (increased from three points to five from 31 October 2024) does not apply regardless of how many other properties either spouse owns.
This should be contrasted with the position where one spouse buys a property from a third party. In that case, Paragraph 9 of Schedule 4ZA FA 2003 treats the spouses as a single unit. The property interests of both spouses are aggregated, and if either of them meets Conditions A to D in Paragraph 3, the higher rates apply to the purchase. But for a direct transfer between the spouses themselves, Paragraph 9A takes them out of the higher rates surcharge entirely.
Transfers on divorce or dissolution
No SDLT is chargeable where property is transferred between spouses or former spouses as part of a court order or agreement made in connection with a divorce, the dissolution of a civil partnership, a judicial separation, or the annulment of a marriage. A land transaction return is not required in these circumstances.
Example
Mrs Ngoma owns a buy-to-let property valued at £400,000 with an outstanding interest-only mortgage of £180,000. She transfers the property to her husband, Mr Ngoma, as a gift while the couple are living together. Mr Ngoma assumes the full mortgage. The chargeable consideration is £180,000. Because the transfer is between spouses living together, Paragraph 9A of Schedule 4ZA FA 2003 disapplies the higher rates for additional dwellings. SDLT is calculated at the standard residential rates. If Mrs Ngoma had instead transferred the property free of any mortgage perhaps by redeeming the mortgage before the transfer, no SDLT would be due at all.
Inheritance Tax
The spouse exemption
For IHT purposes, interspousal transfers remain highly favourable. Section 18(1) of the Inheritance Tax Act 1984 ("IHTA 1984") provides that a transfer of value between spouses or civil partners is an exempt transfer. This applies whether made during the transferor's lifetime or on death. In broad terms, there is no cap on the amount, provided both spouses are within the UK IHT regime on their worldwide assets.
It is important, however, to understand what this exemption does and does not achieve. A transfer between spouses does not reduce the combined value of the couple's estates. It moves an asset from one side of the balance sheet to the other. No IHT is saved at the point of transfer and because the transferable nil-rate band provisions allow any unused proportion of the first spouse's nil-rate band to be claimed on the second death, the basic nil-rate band is not lost simply because everything passes to the surviving spouse under the Section 18 exemption on first death.
So, the question a landlord should ask is: if the spouse exemption applies automatically and the nil-rate band transfers to the survivor's estate anyway, what is the IHT planning purpose of transferring property between spouses during their lifetimes?
There are two main practical reasons as discussed below.
The first reason is that an interspousal transfer can allow both spouses to take part in lifetime gifting.
Take the example of Mr and Mrs Khan. If Mr Khan owns all four buy-to-let properties in his sole name and Mrs Khan owns none, only Mr Khan can gift those properties to the children. Any such gift by Mr Khan would be a potentially exempt transfer (PET). If he survives seven years from the date of the gift, the value falls outside his estate for IHT purposes. If he dies within seven years, the gift is brought back into account and uses his nil-rate band first.
If, instead, Mr Khan first transfers two of the properties to Mrs Khan, that transfer is exempt for IHT purposes. Mrs Khan can then choose to gift one or both of those properties to the children as PETs in her own right. This means that the gifting is spread between both spouses rather than sitting entirely with Mr Khan. If both spouses survive seven years from their respective gifts, the gifted properties fall outside their estates.
The point is simple. The interspousal transfer does not itself save IHT. It creates the ability for both spouses to make lifetime gifts, each using their own seven-year survival period and their own nil-rate band position if the seven-year period is not survived.
The second reason concerns the residence nil-rate band ("RNRB"). The RNRB provides an additional £175,000 allowance per person on death where a qualifying residential interest is left to direct descendants. For many married couples and civil partners, the combined RNRB can be valuable, but it is tapered by £1 for every £2 by which the deceased's estate exceeds £2,000,000.
The taper applies by reference to the value of the deceased spouse’s estate on death. It is not tested by looking at the couple’s combined estate as a single figure. This is why lifetime planning before the first death can matter.
If one spouse owns most of the assets and dies first with an estate above £2 million, that spouse’s RNRB may be reduced or lost altogether. By contrast, if assets have been divided more evenly during lifetime, it may be possible for each spouse’s estate to remain below the £2 million taper threshold. In that case, the RNRB is more likely to be preserved.
If one spouse holds the bulk of the couple's assets and their estate on death is above £2,000,000, the RNRB begins to taper and can be reduced to nil entirely. Transferring investment property to the other spouse during their lifetimes using the interspousal exemption can bring each estate below the £2,000,000 taper threshold, so that both RNRBs are available in full. In a couple where the combined estate is, say, £3,200,000, an even split of £1,600,000 each preserve both RNRBs entirely. Leaving it concentrated in one estate at £2,800,000 means that spouse's RNRB is tapered to nil because the excess over £2,000,000 is £800,000, and £800,000 ÷ 2 = £400,000, which exceeds the full RNRB of £175,000.
For instance, if a couple has a combined estate of £3.2 million and it is split equally, each spouse has an estate of £1.6 million. On those figures, neither estate exceeds the £2 million taper threshold. However, if most of the assets sit with one spouse and that spouse dies first with an estate of £2.8 million, their RNRB would be tapered away. The excess over £2 million is £800,000, and the taper at £1 for every £2 of excess is £400,000, which is more than enough to reduce a £175,000 residence nil-rate band to nil.
This is where interspousal transfers can be useful. They can help rebalance ownership before the first death so that one spouse is not left with an estate that unnecessarily loses the RNRB. The planning is not about saving IHT at the point of transfer. It is about improving the structure of the estates before death so that the available allowances are not wasted.
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The restriction where one spouse is not a long-term UK resident
The unlimited spouse exemption does not always apply. Where the transferor is a long-term UK resident and the transferee spouse is not, the exemption is restricted. The limit is broadly equal to the nil-rate band, currently £325,000, and it is a cumulative lifetime limit rather than an amount that refreshes each year.
Before 6 April 2025, this restriction was based on domicile. From 6 April 2025, the Finance Act 2025 replaced the domicile-based framework with a long-term UK residence ("LTR") test. A person is a long-term UK resident if they have been UK tax resident for at least ten of the twenty tax years preceding the relevant tax year. Where both spouses are long-term UK residents, the spouse exemption is unlimited. Where neither is a long-term UK resident, it is equally unlimited for transfers of UK-situated assets within scope. The restriction only bites where one spouse is a long-term UK resident and the other is not.
In those circumstances, the non-long-term-UK-resident spouse may elect to be treated as a long-term UK resident for IHT purposes. Making the election removes the restriction and restores the full unlimited spouse exemption. But the consequence is that the electing spouse's worldwide estate is brought within the scope of UK IHT for as long as the election remains in force, which is until ten consecutive tax years of non-UK residence have elapsed. The decision whether to elect requires careful modelling on a case-by-case basis and professional advice is essential.
Example
Mr and Mrs Delplace are married and living together. Their combined estate is £3,400,000. Mr Delplace owns the couple's main residence worth £900,000 and three buy-to-let flats worth a combined £900,000. Mrs Delplace has savings and investments of £300,000. The remaining £1,300,000 is held jointly in other assets. Mr Delplace's estate alone is comfortably above £2,000,000. If he were to die first with his estate at that level, his RNRB would be fully tapered to nil. Mr Delplace transfers one buy-to-let flat, worth £300,000, to Mrs Delplace during his lifetime. No IHT arises. Mrs Delplace then gifts that flat to their adult daughter as a PET. Provided Mrs Delplace survives seven years, the property falls entirely outside her estate for IHT. The combined estate has been reduced by £300,000 through a chain of transfers: an exempt interspousal transfer followed by a PET. Mr Delplace's estate has been reduced, helping to preserve his RNRB. And Mrs Delplace has used her own capacity to make PETs something she could not have done without receiving the property from Mr Delplace first.
How the Three Taxes Interact
The three taxes do not operate in isolation, and a landlord planning an interspousal transfer must consider all three simultaneously. A few points are worth setting out.
First, a transfer that is a non-event for CGT as Section 58 TCGA 1992 applies and a non-event for IHT because of the Section 18 IHTA 1984 spouse exemption may still produce an SDLT charge if there is a mortgage on the property. The SDLT liability arises by reference to the mortgage debt assumed, not the market value, and there is no spouse relief or exemption to override it. The only comfort is that the five-percentage higher rates surcharge is disapplied, so the charge is at least calculated at the standard residential rates.
Second, deferring CGT through an interspousal transfer does not eliminate the gain it transfers the liability to the receiving spouse. If the intention is for the receiving spouse to sell the property shortly after the transfer, the gain will be based on the original base cost and will be taxable in the receiving spouse's hands. The benefit of the transfer depends on the receiving spouse paying CGT at a lower effective rate whether because they have unused annual exempt amount, unused basic-rate band, or allowable losses to set against the gain.
Third, the IHT spouse exemption is unlimited where both spouses are long-term UK residents, but it achieves nothing in terms of overall IHT reduction unless it is part of a broader plan. Transferring property from one spouse to another and then leaving it all back to the transferor on death is circular. The value of the transfer is in restructuring ownership so that both nil-rate bands, and both residence nil-rate bands, are available in full when the time comes.
Fourth, the interaction between CGT and IHT on death is often misunderstood. When a person dies, the assets in their estate are revalued to market value for CGT purposes. This means any unrealised gain accrued during the deceased's lifetime is effectively wiped out the beneficiary inherits at market value. If one spouse holds a property with a large, embedded gain and that spouse dies first, the gain disappears on death. But if the couple had transferred the property to the other spouse during their lifetimes and that other spouse then sells it, the full gain from the original acquisition is in charge. The decision of whether to transfer a property between spouses, or instead to hold it in the ownership of the spouse more likely to die first may require careful planning
Conclusion
Interspousal property transfers remain a legitimate and often effective planning tool for UK landlords across CGT, SDLT and IHT. But the value of any such transfer depends entirely on understanding how each tax applies on its own terms and how the three interact in combination. The temptation to characterise an interspousal transfer as broadly “tax-free” is dangerous to say the least. For landlords with significant property portfolios, these interactions are not merely academic. A mortgage assumed on transfer produces a real SDLT charge. A gain deferred on transfer produces a larger CGT liability in the receiving spouse’s hands on any future sale. An estate left unequal may mean that one spouse’s nil-rate band is effectively wasted. Properly modelling an interspousal transfer requires a transaction-by-transaction analysis that brings CGT, SDLT, and IHT position together, alongside the underlying documentation requirements.
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