Does SDLT higher rates apply if spouses live separately on a long-term basis?

Introduction

A common SDLT question arises where a married couple do not share one home. If one spouse buys a new property in their sole name, it is natural to worry that the other spouse’s home ownership will trigger the higher rates for additional dwellings.

The answer depends on two linked issues under Schedule 4ZA to the Finance Act 2003. First, are the spouses treated as “living together” on the effective date of the purchase? Second, is the buyer replacing their only or main residence? If the spouses are living separately in circumstances likely to be permanent, the spouse aggregation rules may not apply. If the buyer is also replacing their own main residence, the higher rates may be avoided.

The Question

The scenario can be put in general terms like this:

A buyer owns their current home in their sole name. Their spouse separately owns another home in the spouse’s sole name. The couple married after each had already established separate homes, and they have continued to maintain separate households and separate finances since marriage. The arrangement has been in place for a sustained period, for personal and wellbeing reasons, and there is no present plan or timetable to combine households.

The buyer now intends to purchase a new property in their sole name as a replacement for their current home. The question is whether the spouse’s ownership of a separate dwelling causes the purchase to be treated as an additional dwelling for SDLT purposes, or whether the buyer can rely on the replacement of only or main residence rules without spouse aggregation applying.

Nick’s Explanation

Nick’s reasoning was that the issue turns on paragraph 9 of Schedule 4ZA and the statutory meaning of “living together”. In anonymised form, his view was:

“Where spouses are living separately in circumstances likely to be permanent, paragraph 9(3) treats them as not living together for Schedule 4ZA. In that case, a sole purchase to replace the buyer’s own main residence is assessed on the buyer’s position alone. If the replacement test in paragraph 3 is met, the 5% higher rates surcharge does not apply.”

He also highlighted two important practical points:

• the current higher rates uplift starts at 5%, not 3%
• if the new purchase completes before the old main residence is sold, higher rates may need to be paid first and reclaimed later if the old home is sold within the permitted period

His overall conclusion was that, on facts showing genuinely separate and ongoing households, the spouse’s separate home should not automatically taint the buyer’s replacement purchase.

The Law

The relevant rules are in Schedule 4ZA to the Finance Act 2003.

Paragraph 2 identifies when a transaction is a “higher rates transaction”. Paragraph 3 then sets out the conditions for purchases of a single dwelling. One of the most important exceptions is where the purchase is a replacement of the buyer’s only or main residence.

Paragraph 3(5) to 3(8) contains the replacement test. Broadly, the higher rates do not apply if:

• the buyer intends the new dwelling to be their only or main residence, and
• the buyer has disposed of a previous only or main residence within the three years before the new purchase, or disposes of it within the permitted period after completion

Paragraph 8 deals with repayment where higher rates were paid first and the old main residence is sold later within the allowed period.

Paragraph 9 deals with spouses and civil partners. In many cases, spouses are treated as one unit for the higher rates rules, so one spouse’s ownership can affect the other’s purchase even if the new purchase is in one name only.

However, paragraph 9(3) imports the test from Income Tax Act 2007, section 1011. Under that rule, spouses are treated as living together unless:

• they are separated under a court order, or
• they are separated in circumstances in which the separation is likely to be permanent

HMRC’s guidance at SDLTM09810 is relevant to the question of whether spouses are treated as living together for these purposes.

Analysis

Step one is to identify the buyer’s own transaction. If the buyer is purchasing a new home to live in as their only or main residence, that points toward the replacement rules rather than the additional dwelling rules.

Step two is to ask whether the spouse’s separate home must be taken into account. Normally, marriage can bring paragraph 9 into play. But paragraph 9 only aggregates spouses if they are treated as living together on the effective date of the transaction.

Step three is to assess whether the spouses are in fact “living separately in circumstances likely to be permanent”. This is a factual question. Relevant features include:

• separate homes maintained over a substantial period
• separate finances and separate household arrangements
• clear personal reasons for living apart
• no present plan or timetable to resume living together
• evidence showing that the arrangement is genuine and ongoing, rather than temporary convenience

If those facts are present, the better view is that paragraph 9 does not aggregate the spouse’s property interests with the buyer’s purchase.

Step four is to apply the replacement test under paragraph 3 on the buyer’s own facts. If the buyer is selling their current main residence and buying a new one to replace it, the higher rates should not apply, provided the timing rules are met.

That timing point matters. If the old home is sold before completion of the new purchase, the replacement position is usually straightforward. If the old home is still owned at completion, higher rates may be charged initially, with a later reclaim if the old main residence is sold within the permitted period.

It is also important to be precise about the rate itself. The source material referred to a 3% surcharge, but Nick correctly noted that the higher rates uplift now starts at 5%.

This scenario is different from an “uninhabitable” case. Some buyers ask whether a property can be ignored as a dwelling because it is not suitable for use. The threshold for that argument is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. That authority underlines that serious disrepair or inconvenience will not easily take a property outside the dwelling rules. In a case about spouses living separately and replacing a main residence, the stronger route is usually the paragraph 9 and paragraph 3 analysis, not an argument about habitability.

Outcome

Where spouses have genuinely been living in separate households in circumstances likely to be permanent, paragraph 9 should not aggregate their property ownership for Schedule 4ZA purposes.

In that situation, a buyer purchasing a new home in their sole name to replace their own only or main residence is normally assessed on their own position alone. If the replacement of only or main residence conditions in paragraph 3 are met, the higher rates should not apply.

If the old main residence has not yet been sold by completion, the buyer may need to pay higher rates first and reclaim them after the sale, assuming the sale takes place within the statutory time limit.

Practical Steps

A buyer in this position should gather evidence showing both the separate-living position and the replacement-residence position.

• Keep council tax records showing each spouse registered at a different home.
• Keep utility, insurance, bank and driving licence records showing long-term separate addresses.
• Prepare a short chronology explaining when the separate living arrangement began and why it is intended to continue.
• Keep evidence that the new property is intended to be the buyer’s only or main residence, such as mortgage papers, moving arrangements and change-of-address records.
• Check carefully whether the current main residence will be sold before or after completion of the new purchase.
• If the old home will be sold after completion, discuss with the conveyancer whether higher rates should be paid first and reclaimed under paragraph 8.
• Ask the conveyancer to record clearly in the SDLT analysis that paragraph 9 does not apply because the spouses are not living together within paragraph 9(3), and that paragraph 3 applies if the purchase is a replacement of the buyer’s only or main residence.

Conclusion

A married person does not automatically pay SDLT higher rates just because their spouse owns another home. If the spouses are living separately in circumstances likely to be permanent, paragraph 9 may not apply. If the buyer is also replacing their own only or main residence, the purchase can fall outside the higher rates rules, subject to the normal timing requirements for sale of the old home.

Legal References Used

• Finance Act 2003, Schedule 4ZA
• Finance Act 2003, Schedule 4ZA, paragraph 1(2)
• Finance Act 2003, Schedule 4ZA, paragraph 2
• Finance Act 2003, Schedule 4ZA, paragraph 3
• Finance Act 2003, Schedule 4ZA, paragraph 3(5)–(8)
• Finance Act 2003, Schedule 4ZA, paragraph 3(6A)
• Finance Act 2003, Schedule 4ZA, paragraph 8
• Finance Act 2003, Schedule 4ZA, paragraph 9
• Finance Act 2003, Schedule 4ZA, paragraph 9(3)
• Income Tax Act 2007, section 1011
• HMRC SDLT Manual, SDLTM09810
• 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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