Do married couples pay higher SDLT when only one spouse owns the current main home?

Introduction

This is a common Stamp Duty Land Tax question where a married couple live together in one spouse’s home, while the other spouse still owns another property such as a buy-to-let. The issue is whether a new joint purchase is treated as an additional dwelling, so that the higher SDLT rates apply, or whether it counts as replacing the couple’s main residence.

The confusion often arises because one spouse may not be on the legal title to the home they actually live in. People then ask whether that home can still count as their main residence for SDLT purposes. In the scenario considered here, the legislation indicates that it can.

The Question

A married couple live together in a property owned solely by one spouse. The other spouse owns a separate property, which used to be their home but has for some years been let out as a buy-to-let. The couple now want to buy a new home together and sell the property they currently live in in order to move.

The question is whether the new purchase attracts the higher rates for additional dwellings, simply because one spouse still owns the buy-to-let and is not on the legal title to the current home. A further question is whether the spouse who is not on title to the current home needs to be added to that title before the move, in order for the purchase to count as a replacement of a main residence.

Nick’s Explanation

Nick’s view was that the higher rates should not apply on these facts if the couple are married, living together, and replacing the home they actually occupy as their main residence.

In anonymised form, his reasoning was:

“The relevant law is Schedule 4ZA of the Finance Act 2003. If the new property is a replacement for the purchaser’s only or main residence, the surcharge does not apply.”

He also explained that, under the SDLT rules for spouses and civil partners living together, the couple are treated as a single unit. In practical terms, that means the home owned by one spouse can be treated as the other spouse’s main residence for these purposes, even if the other spouse is not named on the legal title.

Nick further noted that the legislation allows a disposal by one spouse to count for the couple where they are living together and replacing their main residence. On that basis, if the couple sell the home they live in and buy a new home to live in, the replacement exception should be available, so the higher rates should not apply.

The Law

The relevant provisions are in Schedule 4ZA to the Finance Act 2003, which contains the higher rates for additional dwellings.

The higher rates apply if the statutory conditions are met at the effective date of the transaction. One of the key questions is whether the purchased dwelling is a replacement for the purchaser’s only or main residence.

Paragraph 3(5) of Schedule 4ZA sets out Condition D. In substance, if the purchased dwelling is a replacement for the purchaser’s only or main residence, Condition D is not met, and the higher rates do not apply.

Paragraphs 3(6) and 3(7) deal with what counts as replacing a main residence, including disposal of a previous main residence within the permitted period.

Paragraph 9 of Schedule 4ZA is especially important where spouses or civil partners are living together. It contains the rule that they are treated together for these purposes. That deeming rule can affect both property ownership analysis and the replacement of a main residence.

HMRC’s manual at SDLTM09810 gives worked examples on Condition D and includes examples consistent with the principle that, where spouses are living together, a disposal by one spouse of the home they occupy can count for the couple when assessing replacement of a main residence.

Analysis

The analysis can be broken down into four steps.

First, identify the couple’s actual main residence. SDLT does not simply ask who is on the legal title. It asks whether the dwelling being replaced was the purchaser’s only or main residence. In a married couple case, paragraph 9 matters because spouses living together are not looked at in complete isolation from one another.

Second, consider the fact that one spouse owns another property, such as a buy-to-let. That fact is relevant because it may mean the purchaser has an interest in another dwelling at the effective date of the new purchase. But that does not end the enquiry. The higher rates can still be disapplied if the new purchase is a replacement of the only or main residence.

Third, ask whether the home currently occupied by the couple is being disposed of. If the couple are selling the property they live in as their home, and then buying another property to occupy as their new home, that points strongly toward replacement of a main residence.

Fourth, apply the spouse rule. Where spouses are living together, the legislation treats them as a single unit for these purposes. That is why the absence of one spouse from the legal title of the current home is not, on its own, fatal to the replacement analysis.

On the facts described, the better view is that the couple are replacing their main residence. The spouse who owns the buy-to-let does not lose the replacement exception merely because they are not named on the title to the current home. The current home is still the couple’s main residence in substance, and its sale can count as the disposal required by paragraphs 3(6) and 3(7), read with paragraph 9.

That means adding the non-owning spouse to the title of the current home before completion should not normally be necessary just to secure the replacement exception. If the legislation already treats the couple as a unit, the SDLT answer should turn on the actual occupation and disposal of the main residence, not on a last-minute title rearrangement.

As always, the exact result depends on the full facts, including timing of sale and purchase, whether the couple are in fact living together, and whether the property being sold was genuinely their only or main residence.

This is different from an “uninhabitable” argument. Where a buyer tries to say a dwelling was not suitable for use as a dwelling, the legal threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. But that issue does not appear to be the main point here. The central point is replacement of a main residence under Schedule 4ZA.

Outcome

Where a married couple are living together in one spouse’s sole-owned home, and they sell that home in order to buy a new home together, the new purchase can qualify as a replacement of their main residence even if the other spouse is not on the legal title to the old home.

On those facts, the higher SDLT rates should not apply, despite the other spouse owning a separate buy-to-let property.

Practical Steps

If you are assessing a similar case, it is sensible to work through the following points:

• Confirm whether the buyers are married or civil partners and living together at the relevant time.
• Identify which property is actually being used as the couple’s only or main residence.
• Check whether that main residence is being sold, and when, compared with the purchase of the new home.
• Review Schedule 4ZA Finance Act 2003, especially paragraphs 3(5) to (7) and paragraph 9.
• Compare the facts with HMRC’s guidance at SDLTM09810.
• Ask the conveyancer to explain precisely why they believe the replacement exception does not apply.
• If necessary, provide a written analysis focused on the spouse rule and the disposal of the current main residence.

It is usually better to resolve the SDLT analysis directly under the legislation than to try to alter legal title shortly before completion unless there is some separate property reason for doing so.

Conclusion

If spouses are living together and selling the home they actually occupy as their main residence in order to buy a new home, the replacement exception in Schedule 4ZA can apply even where only one spouse is on the title to the old home. In that situation, the higher SDLT rates should not normally be payable just because the other spouse owns a separate buy-to-let.

Legal References Used

• Finance Act 2003, Schedule 4ZA
• Finance Act 2003, Schedule 4ZA, paragraph 3(5)
• Finance Act 2003, Schedule 4ZA, paragraphs 3(6) and 3(7)
• Finance Act 2003, Schedule 4ZA, paragraph 9
• HMRC Stamp Duty Land Tax 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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