Do you pay SDLT on a first UK home if you already own a small share of a foreign property worth less than £40,000?

Introduction

A common Stamp Duty Land Tax question arises where a buyer is purchasing their first home in England or Northern Ireland, but already owns a small share in a property abroad. The concern is usually whether that overseas interest means the purchase counts as an “additional dwelling” and triggers the higher SDLT rates.

This issue matters because the higher rates can apply even where the buyer has never previously bought a home in the UK. The rules look at residential property ownership anywhere in the world, including partial ownership. However, there is an important value threshold. If the existing interest is worth less than £40,000, it is generally ignored for the higher rates test.

The Question

A married couple plan to buy a flat in England for about £160,000. Neither spouse has previously bought a property in the UK or elsewhere, but one spouse was gifted a 50% share in a flat overseas some years ago. The current value of that 50% share is thought to be around £35,000 to £40,000.

They want to know:

• whether SDLT is payable on the UK purchase;
• whether the 3% higher rates for additional dwellings apply because of the overseas property share;
• whether selling the overseas share later would create any refund claim; and
• what evidence they may need to show the value of the overseas interest.

Nick’s Explanation

Nick’s core view was that this is likely to be a straightforward case if the overseas share is genuinely worth less than £40,000 at the effective date of the UK purchase.

In anonymised form, his explanation was:

“Since the overseas property interest is valued at less than £40,000, it will not be treated as an additional property for SDLT higher rates purposes. Therefore, the UK purchase would not attract the 3% surcharge. As the purchase price is under £250,000, the standard SDLT rate is 0%, so no SDLT would be due.”

He also pointed to HMRC’s published guidance, which states that the higher rates apply when a buyer purchases a dwelling for £40,000 or more and, at the end of the day of purchase, owns another residential property interest worth £40,000 or more anywhere in the world, subject to the other conditions.

The Law

SDLT is charged under the Finance Act 2003. For residential purchases, the amount due depends on the consideration paid and whether any higher rates apply.

The higher rates for additional dwellings are contained in Schedule 4ZA to the Finance Act 2003. Broadly, the surcharge applies if, at the end of the effective date of the transaction:

• the buyer owns a major interest in another dwelling anywhere in the world;
• that interest has a value of £40,000 or more;
• the other dwelling is not subject to a lease with more than 21 years left to run held by someone else; and
• the purchased dwelling is not replacing the buyer’s only or main residence, where the replacement rules apply.

The £40,000 threshold is critical. If the buyer’s existing dwelling interest is worth less than £40,000, it is generally left out of account for the higher rates test.

For ordinary residential rates, a purchase at £160,000 falls within the 0% band under the rates in force at the time referred to in Nick’s reply. On that basis, if the higher rates do not apply, no SDLT is payable.

Although this article concerns ownership of another property rather than property condition, it is worth noting that where buyers argue that a dwelling was uninhabitable or not suitable for use as a dwelling, the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799.

Analysis

The position can be worked through in stages.

First, the planned UK purchase price is about £160,000. On ordinary residential SDLT rates, that falls within the 0% band referred to in the advice, so there would be no SDLT unless a higher-rate rule applies.

Second, one spouse already owns a 50% share in an overseas flat. Overseas property ownership does count for SDLT purposes. It does not matter that the property is outside the UK, and it does not matter that only a share is owned. A partial interest can still be enough.

Third, the key question is the value of that existing interest at the effective date of the UK purchase. The relevant figure is the value of the buyer’s own share, not necessarily the value of the whole flat. If that 50% share is worth less than £40,000, the higher rates should not apply.

Fourth, if the share is less than £40,000, the couple are not treated as owning another dwelling for the Schedule 4ZA threshold test. That means the UK purchase should not be treated as an additional dwelling purchase.

Fifth, if the higher rates do not apply, there is nothing to refund later. Refunds usually arise where the higher rates were paid first and the buyer later sells a previous main residence within the permitted period. That is a different situation. Here, if no surcharge is due at completion because the overseas interest is below £40,000, there is no SDLT surcharge to reclaim later.

Sixth, evidence matters. If the overseas share is close to £40,000, the buyers should keep clear evidence showing the market value of that share at the purchase date. In practice, that may include:

• a valuation from a suitably qualified local valuer or surveyor;
• official land or property registry extracts from the relevant country;
• documents showing ownership percentages;
• recent comparable sale evidence, where available; and
• a translation of key documents into English if the originals are in another language.

The buyer’s conveyancer will usually decide what they need for the SDLT return and file position. Originals are not always necessary, but reliable copies and translations are often sensible.

Outcome

If the overseas 50% share is worth less than £40,000 at the time of the UK purchase, the 3% higher SDLT rates should not apply. On a £160,000 residential purchase, and using the rate bands referred to in the advice, the SDLT due would therefore be nil.

If, however, that overseas share is actually worth £40,000 or more, the analysis changes and the higher rates may need to be considered carefully.

Practical Steps

If you are in this position, the sensible next steps are:

1. Ask your conveyancer to confirm the SDLT treatment before exchange and completion.
2. Obtain evidence of the current market value of your overseas share, not just the value when it was gifted.
3. Make sure the valuation is tied to the likely completion date or close to it.
4. Keep proof of the ownership split, such as title documents or equivalent registry records.
5. If the documents are not in English, obtain certified translations if your conveyancer requests them.
6. If the value is near the £40,000 line, get a professional written valuation rather than relying on informal estimates.

The point to check is the value of the interest owned at the effective date of the UK purchase. That is the fact that drives the higher-rates result.

Conclusion

A small overseas property share does not automatically trigger higher SDLT rates. If the existing share is worth less than £40,000, it is generally ignored for the additional dwelling surcharge. In the scenario considered here, that means the UK purchase at £160,000 should not give rise to SDLT, provided the overseas share is genuinely below the threshold and the evidence supports that figure.

Legal References Used

• Finance Act 2003
• Finance Act 2003, Schedule 4ZA
• HMRC guidance: Stamp Duty Land Tax: buying an additional residential property
• Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799

This page was last updated on 22 March 2026.

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