Transfer of Equity on Rental Property UK 2026 — SDLT, Capital Gains Tax, Mortgage Consent, and Process

Why landlords transfer equity — common scenarios

The most common reasons a landlord transfers equity in a rental property:

• Adding a spouse or civil partner — income splitting: The most common reason for a transfer of equity on a rental property is to add a spouse or civil partner to the title so that rental income can be split for tax purposes. A higher-rate taxpayer landlord who adds a lower-rate taxpayer spouse to the title can then use a Form 17 election (or unequal declaration of trust) to redirect rental income to the lower-rate taxpayer. The TCGA 1992 s.58 no-gain-no-loss rule means adding a spouse triggers no immediate CGT liability
• Pre-death estate planning: Transferring a share of a rental property to adult children before death can reduce the taxable estate for Inheritance Tax (IHT) purposes. However, gifts with reservation of benefit (FA 1986 s.102) and potentially exempt transfers (PETs) rules apply — a transfer must be a genuine gift with no strings attached to fall outside the estate after 7 years. Taking a co-ownership interest in a property while continuing to live there (even in a different part) may trigger the gift with reservation rules
• Removing a joint owner on relationship breakdown: Where a rental property is owned jointly by a separating couple, one party will typically transfer their share to the other as part of the financial settlement. This may or may not involve consideration (buy-out of equity). SDLT depends on the consideration given — where one party assumes sole responsibility for the mortgage, SDLT applies to the debt assumed
• Incorporation — transfer to limited company: Where a landlord transfers properties to a limited company (incorporation relief), a transfer of equity may be part of the process. SDLT (including the 3% surcharge) applies to the consideration (typically market value) on each property transferred to the company. CGT also applies — incorporation relief under TCGA 1992 s.162 may defer the CGT where the entire letting business is transferred as a going concern and the whole consideration is in shares, but HMRC challenges this relief in the rental context
• Tenants in common — adjusting shares: Where a property is owned by two or more parties as tenants in common (rather than joint tenants), the shares may be unequal from the outset or may change over time (as capital contributions differ). A transfer of equity between tenants in common adjusts the proportions recorded at Land Registry and recognised by HMRC for tax purposes

SDLT on transfer of equity — the debt assumption rule

Stamp Duty Land Tax (SDLT) is the most significant immediate tax risk in a transfer of equity on a mortgaged rental property:

• Chargeable consideration — what triggers SDLT: SDLT applies to the chargeable consideration given by the transferee. Where the transfer is for nominal consideration (£1) and there is no mortgage on the property, the chargeable consideration is £1 — SDLT is effectively nil (below the nil-rate threshold). Where the property is mortgaged, the position is more complex
• Mortgage debt assumption — the key SDLT trigger: Under FA 2003 s.43(6), where a transferee assumes or takes on responsibility for a portion of the mortgage debt as part of a transfer of equity, the value of the mortgage debt assumed is treated as chargeable consideration for SDLT. This is the most common SDLT trigger in transfers of equity — even where no money changes hands, the transferee's assumption of debt constitutes consideration
• Example — adding spouse to title of mortgaged rental: Property has a mortgage of £200,000. Landlord adds spouse to title — spouse becomes jointly and severally liable for the full mortgage. The spouse has assumed 50% of the mortgage debt (£100,000). SDLT is calculated on £100,000. The 3% surcharge applies if the spouse already owns another residential property (which is common where the couple own their main home — both spouses are treated as having the same property interests). SDLT: 3% on £100,000 (first £250,000 at 3% plus standard rates above threshold) = £3,000 (approximately)
• The 3% surcharge — almost always applies to rental property transfers: The 3% SDLT surcharge applies where the purchaser (the incoming party to the equity transfer) already owns any other residential property — including their main residence. In the vast majority of transfers of equity on rental properties, the transferee already owns the family home or other properties — so the 3% surcharge applies to the entire chargeable consideration. There is no exemption from the surcharge for transfers between spouses
• Relief — transfers pursuant to court orders on divorce: Transfers of equity pursuant to a court order as part of financial remedy proceedings on divorce or dissolution of civil partnership benefit from relief from the 3% surcharge (and potentially from SDLT altogether in some circumstances). But relief must be claimed — it is not automatic. Take specialist SDLT advice if the transfer is part of a financial settlement

Capital gains tax on transfer of equity — connected persons and market value

CGT applies to transfers of equity in rental property depending on the parties involved:

• Connected persons — market value rule (TCGA 1992 s.18): Where a transfer is made to a connected person (as defined by TCGA 1992 s.286 — spouse, civil partner, relative, or business partner), the disposal is treated as made at market value — regardless of the actual consideration given. A landlord who transfers a 50% interest to a sibling for £1 is treated as having disposed of that 50% interest at market value. CGT applies to the gain between the deemed disposal proceeds (market value of the transferred interest) and the original acquisition cost allocated to that share
• Transfers between spouses — no gain, no loss (TCGA 1992 s.58): Transfers between spouses and civil partners who are living together are treated as no gain, no loss. The transferee is treated as having acquired the interest at the transferor's original acquisition cost — meaning no CGT is payable on the transfer itself. The gain is deferred to the eventual disposal of the property. This is the key advantage of adding or transferring to a spouse — CGT is deferred, and on eventual sale both spouses may use their annual CGT exemption
• CGT on transfer to unconnected party or adult child: Transfers to unconnected parties are taxed on actual proceeds. Transfers to adult children (connected persons) are taxed at market value. The annual CGT exemption (£3,000 for 2025/26) can be applied, but for significant rental properties this may be small relative to the gain. Private residence relief does not apply to pure rental properties
• Base cost implications for the transferee: Where the transfer is to a spouse at no gain/no loss, the spouse's base cost (acquisition cost for future CGT purposes) is the original cost paid by the transferor — not the market value at the date of transfer. This means the potential future gain is unchanged — it is merely transferred from one taxpayer to another. On eventual disposal, the spouse (or former spouse after separation) will be assessed on the full gain from the original acquisition cost
• Non-resident transfers: Where the transferor is non-UK resident (or the property is transferred to a non-UK resident), additional HMRC reporting requirements and withholding tax considerations apply under the Non-Resident Capital Gains Tax (NRCGT) regime

Mortgage lender consent — a critical step

Most buy-to-let mortgages contain restrictions on transferring the legal title without the lender's consent:

• Why consent is required: A buy-to-let mortgage is a contract between the lender and the mortgagor(s) — the named legal owners. Where the legal ownership changes (even where the mortgage is not being paid off), the lender's security changes. Most mortgage terms explicitly prohibit the transfer of legal title without the lender's written consent. Transfer without consent is a breach of the mortgage conditions and may entitle the lender to demand immediate repayment of the outstanding mortgage (exercising the power of sale)
• Consent to let vs consent to transfer: Consent to let (where the lender agrees to the property being tenanted) is different from consent to transfer legal title. Both may be needed — a landlord transferring an equity share to a spouse must obtain consent to transfer in addition to any consent to let that may already be in place
• Process for obtaining consent: The mortgagor(s) should write to the lender setting out the proposed transfer, the identity of the incoming party, and the reasons for the transfer. Lenders typically require: proof of identity for the incoming party; a credit check on the incoming party; evidence that the mortgage remains affordable; and a new mortgage application in some cases. Where the incoming party's income or credit history is poor, the lender may refuse consent
• Remortgage as an alternative: Where the existing lender refuses consent, it may be necessary to remortgage to a new lender who is willing to lend on the restructured ownership basis. A remortgage involves early repayment charges on the existing mortgage (where in a fixed-rate period) and arrangement fees on the new mortgage — these costs must be factored into the overall economics of the transfer
• Process summary — steps to complete a transfer of equity: (1) Obtain lender consent; (2) instruct specialist conveyancing solicitors (both transferor and transferee should be independently advised); (3) solicitor prepares the TR1 transfer deed and any related declaration of trust or deed of trust; (4) SDLT is calculated and, where applicable, paid and return filed with HMRC within 14 days of completion; (5) application made to HM Land Registry to register the new ownership; (6) update the tenancy agreement and deposit protection if the property is let — new landlord details must be provided to tenants under s.3 LTA 1985

Frequently asked questions