Gifting UK Property to US Children: Double Tax

Gifting UK property to children who are US taxpayers can tax a gain twice. The UK charges the parent Capital Gains Tax as if the property were sold at market value, but the US gives the child the parent's original cost as basis, so the pre-gift gain is taxed again on sale.

Families usually discover this after the gift, when a child in Boston or California sells the flat and their US preparer asks what it originally cost. By then the parent has already paid UK tax on most of the same gain, and none of that tax can be credited on the child's US return. This article sets out where the double charge comes from, how it changes depending on whether the parent is a US citizen, and the alternatives worth modelling before anything is transferred.

Key takeaways

• A gift is a sale for UK Capital Gains Tax. Gifts to anyone other than a spouse, civil partner or charity are taxed under the normal rules, using the property's market value at the date of the gift.
• The US does not reset the value. Under Internal Revenue Code section 1015, a child who receives a property by gift generally takes the donor's original basis, so the gain built up before the gift stays inside the property.
• The UK tax paid by the parent cannot be credited by the child. The parent paid it, in an earlier year, on a different taxpayer's gain, so it does not meet the conditions for a foreign tax credit on the child's Form 1116.
• Inheritance resets both systems. Property passing on death generally gets a market-value base cost in the UK and a stepped-up basis in the US, which is why "gift now or leave it in the will" is a real comparison and not a formality.
• The 7-year rule still applies. The gift is a potentially exempt transfer for UK Inheritance Tax, and a gift the parent keeps living in can be treated as never having left the estate.

Why does the UK tax a gift as though it were a sale?

For UK Capital Gains Tax, giving an asset away is a disposal. GOV.UK's guidance on Capital Gains Tax on gifts explains that special rules apply only to gifts to a spouse, civil partner or charity, and that the normal rules apply to gifts to anyone else. Between family members, the disposal is treated as made at market value, so the parent is taxed on the difference between what they paid and what the property is worth on the day of the gift, even though no money changes hands.

For 2026-27 the residential property rates are 18% and 24%, depending on the parent's income, per GOV.UK's Capital Gains Tax rates page. If the property was the parent's main home throughout, Private Residence Relief may remove most or all of the gain; a let or second property usually has no such shelter.

Timing is tight. A UK resident disposing of UK residential property must report and pay any Capital Gains Tax within 60 days of completion, per GOV.UK's guidance on reporting and paying Capital Gains Tax. A gift has no completion in the conveyancing sense, and the legislation settles the point directly: Schedule 2 to the Finance Act 2019 provides that the "completion" of a disposal occurs "at the time of the disposal", and only where the disposal is made under a contract later completed by a conveyance or transfer does it instead occur "at the time when the instrument takes effect". An outright gift is not made under a contract, so there is no second date to wait for: the clock runs from the day of the gift itself, the day the parent ceases to be the beneficial owner. That is what GOV.UK means by the "date you stopped being the property's owner". Families who assume the clock starts when the Land Registry catches up have usually lost most of the window.

Gift holdover relief, which can defer the gain in some UK gifts, does not help here, and it is worth being precise about why. Section 165 of the Taxation of Chargeable Gains Act 1992 defers a gain only on the assets listed in section 165(2) — assets used in a trade, profession or vocation, and unlisted or personal-company shares — or, under section 260, on gifts immediately chargeable to Inheritance Tax, such as gifts into most trusts. An outright gift of a residential property to an adult child is neither. The child's US residence is not what blocks the claim. Section 166 does disapply the relief where "the transferee is not resident in the United Kingdom", but it opens with the words "Subject to section 167A", and section 167A restores holdover for gifts of direct or indirect interests in UK land to a non-resident. HMRC's Capital Gains Manual says the same at CG66884: where a non-resident is the donee of such a gift, from a UK or a non-UK resident donor, "hold-over relief will again be available". Nor is there an emigration clawback to fear, because that charge bites only where the donee was UK resident when the gift was made. The obstacle is the asset, not the child.

How does the US treat the same property in the child's hands?

The US does not treat the gift itself as a taxable event for the recipient, and it does not rebase the property. Under Internal Revenue Code section 1015, a person who receives property by gift generally takes the donor's adjusted basis for measuring a later gain. The child therefore inherits the parent's original purchase price, converted to US dollars at the exchange rate when the parent bought it.

When the child eventually sells:

• The US taxes the whole gain from the parent's original cost to the sale price, including the slice the UK already taxed at the date of the gift.
• The UK may tax the child too, but only on the gain since the gift, because the child's UK base cost is the market value used for the parent's charge. A non-UK-resident child selling UK residential property is still within UK Capital Gains Tax on that post-gift gain.
• Form 1116 can credit the child's own UK tax on the sale against US tax on the same gain. It cannot credit the parent's earlier UK tax, which is the slice that ends up taxed twice.

That mismatch is the double charge: the pre-gift gain is taxed in the UK on the parent and in the US on the child, with no mechanism to set one against the other.

Does it matter whether the parent is a US citizen?

Yes, it changes who files what, but it does not remove the double charge.

| Question | Parent is not a US person | Parent is a US citizen |

|---|---|---|

| US gift tax on the parent? | No US gift tax on gifts of non-US property such as a UK house | Gift tax applies; a gift over the 2026 annual exclusion of $19,000 per donee requires Form 709 and uses the lifetime exemption ($15,000,000 for 2026, IRS) |

| US reporting by the child? | Form 3520, Part IV, if gifts from that nonresident alien exceed $100,000 in the year (IRS) | No Form 3520; the gift is reported by the parent on Form 709 |

| Child's US basis | Parent's original cost (section 1015) | Parent's original cost (section 1015), adjusted for any US gift tax paid |

| UK Capital Gains Tax on the gift | Yes, at market value, if the parent is UK resident | Yes, at market value, if the parent is UK resident |

| Is the double charge present? | Yes | Yes — the parent's UK tax cannot be credited because the US does not treat the gift as a sale |

Sources: IRS Gifts from foreign person guidance; IRS estate and gift tax figures for 2026, held in our verified rules register. The US citizen parent's position is covered in more depth in our guide to US estate and gift tax for Americans in the UK.

A US citizen parent faces an additional irritation: their UK Capital Gains Tax on the gift has no US income to be credited against, because the US sees no sale. It is simply a cost.

What about UK Inheritance Tax on the gift?

An outright gift to an individual is a potentially exempt transfer. GOV.UK's guidance on Inheritance Tax on gifts confirms that no tax is due if the donor lives for 7 years after the gift, that gifts within 3 years of death are taxed at 40%, and that taper relief reduces the tax on gifts made 3 to 7 years before death where gifts exceed the £325,000 threshold (2026-27).

Two points catch families out:

• Gift with reservation. If the parent gives the house away but keeps living in it without paying a market rent, GOV.UK is explicit that it still counts towards the estate. The family can end up with the Capital Gains Tax cost of a gift and none of the Inheritance Tax benefit.
• The US estate tax is a separate system. If the parent is a US citizen, the property also sits inside the US estate and gift tax regime, and the US–UK estate and gift tax treaty decides which country has the primary right to tax.

What are the alternatives to gifting the property?

The right answer depends on the size of the gain, the parent's age and health, and whether the child wants the property or its value. Three routes are worth modelling side by side:

| Route | UK tax | US tax for the child | Embedded gain |

|---|---|---|---|

| Gift the property now | Capital Gains Tax on the parent at market value; potentially exempt transfer for Inheritance Tax | Full gain from the parent's original cost taxed on a later sale | Stays inside the property and is taxed twice |

| Sell, then gift the cash | Capital Gains Tax on the parent on the sale; potentially exempt transfer of the cash | No gain to tax; possible Form 3520 reporting if the parent is not a US person | Taxed once, on the parent |

| Leave it in the will | No Capital Gains Tax on death; Inheritance Tax on the estate above available reliefs | Basis generally stepped up to market value at death under section 1014 | Washed out in both systems |

"Sell, then gift the cash" usually removes the double charge at the cost of transaction costs and losing the property. "Leave it in the will" removes the gain entirely but exposes the property to Inheritance Tax at death. Neither is automatically better; the comparison is a calculation. Our article on selling UK property as a US citizen covers the sale side if a disposal is on the table.

How Next Tax Source helps families plan a transfer

We model each route for both countries before anything is signed: the UK Capital Gains Tax and Inheritance Tax position for the parent, the child's US basis and future tax, and the reporting each side will need. That cross-border modelling is the core of what our US–UK accountants do for families. Every plan is reviewed by our IRS Enrolled Agent, who is also ACCA-qualified, and transfers of land should always be documented with a solicitor. If you are thinking of passing a UK property to US-based children, book a consultation before the transfer, not after.