Gifting Property & Stamp Duty: When a Gift Triggers SDLT

Are Property Gifts Subject to Stamp Duty?

Stamp duty (SDLT) is a tax on "chargeable consideration", broadly money or money's worth paid in exchange for a property. In a pure gift, no consideration is paid: the property is transferred for free. With no consideration, there is no SDLT.

This applies to gifts to children, grandchildren, other relatives, and even unrelated parties. As long as the transfer is genuinely free, with no payment, no debt assumption, and no services in exchange, SDLT is nil. HMRC does require that such transfers are properly documented to confirm their gratuitous nature.

However, the situation changes entirely when the property has an outstanding mortgage. See the transfer of equity calculator for calculations where debt is involved.

Documentation requirements for a pure gift

HMRC expects a property gift to be properly evidenced. Typically, this means a formal transfer deed (TR1 form) describing the transfer as a gift, with a nil consideration figure declared. Both the transferor and the transferee sign the deed, which is then registered at HM Land Registry. Where no SDLT is due (because consideration is nil), an SDLT1 return is not generally required, but keep records in case HMRC queries the transaction.

HMRC can, in principle, challenge a purported gift if evidence suggests the parties had a side arrangement, for example if the "donee" is informally expected to pay back the value, or if the transfer is part of a scheme to avoid tax artificially. Genuine gifts are fine; structured arrangements designed to circumvent SDLT may be challenged under anti-avoidance provisions. Similarly, transfers between connected parties are subject to additional scrutiny.

The Mortgage Assumption Rule: When a Gift Triggers SDLT

This is the key rule that surprises most families. When a property is gifted but the recipient takes on the outstanding mortgage, the mortgage debt assumed by the recipient is treated as "chargeable consideration" for SDLT purposes. SDLT is therefore due on the amount of the mortgage assumed, even though no cash was paid.

The nil-rate band (£125,000 post-April 2025) still applies to the mortgage amount, so small mortgages may not generate any tax. But larger mortgages will.

Note that the surcharge (5%) would also apply if the recipient already owns property. The standard SDLT calculation shown above assumes the recipient is buying their first or only property.

Who pays the SDLT on a mortgaged gift?

The recipient, the person receiving the gift, is treated as the purchaser for SDLT purposes. Even though they are not paying cash for the property, by assuming the mortgage debt they have given chargeable consideration. The SDLT return and payment are the recipient's responsibility. The donor (giver) has no SDLT liability; their tax consideration is capital gains tax, which may arise if the property has increased in value since they acquired it.

It is also worth noting that lender consent is required before a mortgage can be formally transferred to a new borrower. The recipient must apply to assume the mortgage or arrange alternative financing. Not all lenders will consent to a mortgage assumption, particularly for residential mortgages. If the lender does not consent, the original mortgage cannot be transferred, and the gift may need to be structured differently.

Gifts to Spouses and Civil Partners

There is a common misconception that transfers between spouses are always SDLT-free. This is not the case. The only spouse/civil partner exemption in SDLT is for court-ordered divorce transfers, not for voluntary gifts between married couples.

If you gift a mortgaged property to your spouse (or add them to the deeds), and your spouse takes on a share of the mortgage, SDLT is due on the mortgage amount, exactly as it would be for any other gift. The marital relationship provides no exemption outside of divorce proceedings.

The distinction between a gift to a spouse and a divorce transfer is significant. In a divorce, a court order provides a complete SDLT exemption, and that exemption extends to the mortgage debt being transferred. Outside of divorce, when a married couple are living together and one spouse gifts a property to the other as a voluntary arrangement (for example, for asset protection or estate planning reasons), the standard gift rules apply. Mortgage assumption is chargeable consideration.

If you are considering gifting property to a spouse for legal or financial reasons, get specific advice before proceeding. The structure of the transfer, and whether any mortgage is involved, has a direct impact on the SDLT position, and the timing relative to any legal proceedings matters.

Gifts to Children: Surcharge Implications for Recipients

When a parent gifts a property to a child, the SDLT position is assessed from the child's perspective, not the parent's. The child is the one receiving the property (and potentially assuming the mortgage), so the child is the one paying any SDLT.

If the child does not already own property and there is no mortgage assumption involved, no SDLT arises. If the child does already own property (or if the mortgage amount exceeds the nil-rate band), SDLT applies.

For strategies to help children buy without triggering the surcharge, see our helping children buy guide.

Gifting vs. Inheriting: Key Differences

The distinction between gifting and inheriting is critical for SDLT purposes, particularly around mortgage debt:

The most significant difference is that mortgage assumption on an inheritance is completely exempt, while mortgage assumption on a gift is taxable. This can make planning the timing of property transfers important in estate planning.

From a practical estate planning perspective, a property with a large outstanding mortgage is generally better left until death if the intention is for a family member to receive it, since the inheritance route avoids any SDLT on the mortgage debt. A gift during lifetime of a heavily mortgaged property can generate an unexpectedly large SDLT bill for the recipient. Conversely, a mortgage-free property carries no SDLT risk under either route, so gifting it during lifetime may serve non-tax goals such as helping a child secure housing earlier.

The Annual Gift Allowance and SDLT: A Common Confusion

The annual inheritance tax (IHT) gift allowance of £3,000 per person is one of the most misunderstood concepts in property tax planning. Many people believe using this allowance reduces or eliminates stamp duty on a property gift. This is completely incorrect.

The £3,000 annual gift allowance is an IHT concept. It determines which gifts fall outside your estate for inheritance tax purposes after death. It has no effect whatsoever on stamp duty:

• It does not reduce the SDLT payable on a gift
• It does not create an SDLT exemption for property transfers
• It is not recognised by HMRC as a relevant factor in SDLT calculations

SDLT and IHT are entirely separate taxes, assessed independently. What eliminates SDLT on a gift is simply the absence of chargeable consideration: no money paid, no debt assumed. The IHT gift allowance is irrelevant to this analysis.

How a Gift Affects the Recipient's Future Stamp Duty

Receiving a gifted property has lasting implications for the recipient's stamp duty position:

• First-time buyer relief: permanently lostThe recipient is now a property owner. They can never claim FTB relief on future purchases. Even if the gifted property is later sold, the historical ownership still disqualifies them.
• Additional dwelling surcharge on future purchasesIf the recipient keeps the gifted property and buys another home, the 5% surcharge applies to the new purchase. The surcharge applies to the entire purchase price of the new property.
• Replacement main residence: no surchargeIf the recipient sells the gifted property and buys a new main residence, they are "replacing" their main residence. The surcharge does not apply. Timing the sale and purchase matters here.