Gifting Property to Spouse 2026 — Complete Guide to CGT, SDLT, Income Splitting and Anti-Avoidance

CGT no-gain no-loss rule and SDLT exemption on spousal transfers

Two major tax reliefs apply automatically to transfers between spouses and civil partners living together:

• CGT no-gain no-loss (TCGA 1992 s.58): Any transfer of an asset (including a rental property or a share of a rental property) between spouses or civil partners who are living together is treated as giving rise to neither a gain nor a loss for capital gains tax. The recipient spouse acquires the asset at the same base cost as the donor — the original acquisition cost of the property (plus any improvement expenditure and incidental costs of acquisition) carried over. No CGT arises on the transfer itself. The deferred gain will crystallise when the recipient spouse later sells the property (or when they are no longer spouses or civil partners at the time of the next disposal). Example: landlord bought a property in 2015 for £150,000; current value £250,000; current gain £100,000. Transfer to spouse — no CGT on transfer; spouse receives property at £150,000 base cost; when spouse sells for £280,000 in 2028, gain = £280,000 - £150,000 = £130,000 (the gain has grown with the property value). The deferral does not eliminate CGT permanently — it defers it to the spouse's future disposal. If the spouse is a basic-rate taxpayer and uses their annual CGT exemption (£3,000 in 2024/25 onwards), the eventual CGT rate may be lower (18% rather than 24% for residential property for higher-rate taxpayers in 2024/25)
• SDLT exemption (FA 2003 s.54 and Sch.3 para 3A): Transfers of land between spouses or civil partners who are living together are exempt from Stamp Duty Land Tax, even if consideration (money; mortgage assumption; or other valuable consideration) passes. This is a full exemption — not a reduced rate. So if a landlord transfers 50% of a property worth £300,000 to their spouse (consideration of £150,000 in terms of beneficial value), no SDLT is payable on the transfer. The exemption also applies where the spouse assumes part of an existing mortgage on the property. The conditions are: (a) the transferor and transferee are spouses or civil partners; (b) they are living together (not separated under a court order, formal deed of separation, or in circumstances where the marriage has irretrievably broken down and they are living separately). Scotland: equivalent LBTT exemption under LBTT(S) Act 2013 Schedule 1 paragraph 3. Wales: equivalent LTT exemption under TCMA 2017 Schedule 3. Northern Ireland: stamp duty (ad valorem) applies to most property transfers — different exemptions regime; take NI-specific tax advice
• Mortgagee considerations on spousal transfer: Where the property is mortgaged, transferring beneficial ownership to the spouse (even without a change in legal title) may technically require the lender's consent if the mortgage documentation includes a condition restricting changes in beneficial ownership. Check the mortgage offer and conditions carefully before proceeding. Most BTL mortgage lenders require the borrower to be the sole or joint beneficial owner — adding a spouse as a beneficial owner (even where they are not the legal owner or mortgage borrower) may be a technically notifiable event. Contact the lender's solicitor or write to the lender's conveyancing team before completing the transfer. In practice, many lenders do not actively monitor beneficial ownership changes — but proceeding without checking creates a technical breach of the mortgage conditions

Declaration of Trust and Form 17 — overriding the 50/50 income default

HMRC's default rule taxes joint property income 50/50. Form 17 overrides this — but only if filed within 60 days of the Declaration of Trust:

• The ITTOIA 2005 s.837 default — 50/50 income split: Under the Income Tax (Trading and Other Income) Act 2005 s.837, where property is jointly owned by spouses or civil partners (regardless of the actual proportions of beneficial ownership), HMRC taxes the rental income as if it were split 50/50 between them for income tax purposes. This is the statutory default — it applies even if one spouse owns 70% of the beneficial interest and the other 30%. To override this 50/50 default, the spouses must make a formal declaration and notify HMRC
• The Declaration of Trust — specifying actual beneficial ownership: Before Form 17 can be submitted, the actual beneficial ownership of the property must reflect the intended income split. This is achieved via a Declaration of Trust (also called a deed of trust) — a formal legal document (signed by both spouses) that sets out the actual beneficial ownership proportions of the property. Example: a property held jointly in legal title (as joint tenants at law) but with a Declaration of Trust specifying 30% beneficial interest to the higher-rate spouse and 70% beneficial interest to the basic-rate spouse. The Declaration of Trust should be: (a) in writing (ideally executed as a deed — signed, witnessed, and delivered); (b) clear as to the parties, the property, and the beneficial ownership shares; (c) signed before Form 17 is submitted. A Declaration of Trust transferring beneficial ownership may also trigger Land Registry registration requirements — take legal advice on whether a Form RX1 restriction should be entered at Land Registry to protect the beneficial ownership
• HMRC Form 17 — the notification: Once the Declaration of Trust has been executed, both spouses must jointly submit HMRC Form 17 ('Declaration by married couple or civil partners of beneficial interests in jointly held property and income') to HMRC within 60 days of the date of the Declaration of Trust. The form requires: (a) confirmation that the beneficial interests are unequal (not 50/50); (b) the actual beneficial ownership proportions; (c) both spouses' signatures; (d) evidence of the Declaration of Trust (attach a copy). From the date specified on Form 17 (which is taken as the date of the Declaration of Trust), income is taxed on the spouses in proportion to their actual beneficial ownership rather than 50/50. If Form 17 is not submitted within 60 days, the election has no effect and the 50/50 default continues to apply
• Income tax saving example: Gross annual rental income: £18,000. No mortgage interest (for simplicity). Expenses: £2,000. Net rental profit: £16,000. Before income-splitting (50/50): higher-rate spouse pays 40% on £8,000 = £3,200; basic-rate spouse pays 20% on £8,000 = £1,600; total tax £4,800. After income-splitting (10/90 — almost all income shifted to basic-rate spouse): higher-rate spouse pays 40% on £1,600 = £640; basic-rate spouse pays 20% on £14,400 = £2,880; total tax £3,520. Annual saving: £1,280. The actual saving depends on the income proportions and each spouse's marginal tax rates. The saving is maximised when the basic-rate spouse has significant unused personal allowance and/or basic-rate band

Settlement provisions anti-avoidance, IHT spousal exemption, and Section 24

Understanding the anti-avoidance rules is essential — but genuine outright gifts between spouses ARE effective for income-splitting:

• Section 624 ITTOIA 2005 — settlement provisions: The 'settlements legislation' (originally Schedule 15 ICTA 1988; now Part 5 Chapter 5 ITTOIA 2005) can attribute income from a settlement back to the settlor (the person who created the settlement) where the settlor retains an interest in the settlement. A concern for income-splitting structures is whether the arrangement constitutes a 'settlement' — broadly, any arrangement or disposition under which income (or the right to income) is diverted to another person. However, HMRC's guidance (and legislative provisions) confirm that an outright gift of property (or a share of property) between spouses is NOT caught by the settlements legislation, provided: (a) the gift is genuine and irrevocable — the donor gives up full legal and beneficial interest in the transferred share; (b) no conditions, trusts, or powers are retained by the donor; (c) the recipient spouse has unrestricted enjoyment of their share (including the right to dispose of it). A genuine Declaration of Trust with Form 17 election, where the basic-rate spouse truly owns their share of the beneficial interest outright, satisfies these conditions. HMRC's own guidance (Business Income Manual BIM20205) confirms this
• What WOULD be caught by settlement provisions: The settlement provisions WOULD catch arrangements where: (a) the donor retains a benefit (e.g., can recall the gift; income flows back to the donor; the gift is conditional on the marriage continuing); (b) the arrangement is entirely artificial (no true transfer of ownership — only a paper arrangement with no substance). As long as the Declaration of Trust genuinely transfers beneficial ownership and the basic-rate spouse has real rights in the property (including on divorce or separation — they would have a real proprietary interest), the settlement provisions do not apply
• IHT spousal exemption — all transfers between spouses are exempt: The Inheritance Tax Act 1984 s.18 provides a complete exemption from IHT for all transfers of value between UK-domiciled spouses or civil partners — both during lifetime and on death. Gifting a property (or a share of a property) to your spouse during your lifetime is therefore completely IHT-free. However, the transferred asset forms part of the recipient spouse's estate — so if the recipient spouse dies with a large estate including the transferred property, IHT may be payable on the combined estate above the nil-rate bands (£325,000 NRB + £175,000 RNRB for qualifying estates in 2024/25; £650,000 + £350,000 combined for couples). IHT planning for property landlords with larger portfolios requires specialist advice on ownership structures, trust arrangements, and timing of gifts
• Section 24 and income-splitting — the strategic interaction: Section 24 (Finance Act 2015) restricts mortgage interest deductibility for individual landlords — the restriction applies to each landlord's share of the interest on jointly owned mortgaged properties, in proportion to their beneficial ownership share. Shifting income to the basic-rate spouse reduces the income tax on the rental profit. However, Section 24's 20% basic rate credit also applies to each spouse's share of the mortgage interest — so both spouses get the 20% credit on their proportionate share of the finance costs. For a highly leveraged portfolio where the 20% credit substantially offsets the income tax liability even at basic rate, the saving from income-splitting may be modest — model the numbers before proceeding. The greatest Section 24 saving from income-splitting arises where: (a) the mortgage interest is not too high (so the higher-rate spouse still has significant taxable profit after the credit); (b) the basic-rate spouse has substantial unused basic-rate band; (c) the basic-rate spouse has significant personal allowance remaining

Frequently asked questions