Do you get first-time buyer SDLT relief if you are married but only informally separated?

Introduction

This is a common Stamp Duty Land Tax question where one spouse has never owned property, but the other spouse already owns a home. Many buyers assume that if the new property will be their first property in their own name, they should qualify for first-time buyer relief. In SDLT law, however, marriage and separation status can change the result.

The issue usually turns on two points: whether the buyer is treated as owning another dwelling because of their spouse, and whether the purchase counts as a higher rates transaction. If it does, first-time buyer relief is blocked.

The Question

A buyer is purchasing a leasehold flat in England or Northern Ireland for about £265,000. The buyer has never owned a property personally.

However, the buyer is married or in a civil partnership and is only informally separated from their spouse. There is no court order and no formal deed of separation. The spouse owns another home in their sole name and will continue living there. The buyer intends to move into the new flat as their own main residence.

The questions are:

• Does the buyer qualify for first-time buyer relief?
• If not, does standard residential SDLT apply?
• Or do the higher rates for additional dwellings apply?

Nick’s Explanation

Nick’s explanation was that the buyer would not qualify for first-time buyer relief on these facts, because the purchase would be a higher rates transaction.

In anonymised form, his reasoning was:

Because the buyer is married and only informally separated, the spouse’s ownership of the existing home is attributed to the buyer for SDLT purposes. That means the buyer is treated as owning two dwellings at the end of the day of purchase. As a result, the purchase is a higher rates transaction, and first-time buyer relief is not available.

He also explained that the purchase would not be treated as a replacement of a main residence, because the spouse’s existing home was not being sold. On that basis, the higher residential rates would apply.

For a purchase price of £265,000, Nick calculated SDLT at £16,500 using the higher rates in force at the time described:

• 5% on the first £125,000 = £6,250
• 7% on the next £125,000 = £8,750
• 10% on the final £15,000 = £1,500
• Total = £16,500

Nick further noted that if the separation were formally recognised before the effective date of the purchase, the result could change. In that event, the spouse’s property might no longer be attributed to the buyer, and the buyer could potentially qualify for first-time buyer relief, assuming all other conditions were met.

The Law

SDLT on residential property in England and Northern Ireland is governed by Finance Act 2003.

First-time buyer relief is contained in Schedule 6ZA to Finance Act 2003. One of the key restrictions is at paragraph 1(7): relief is not available if the transaction is a higher rates transaction.

The higher rates for additional dwellings are contained in Schedule 4ZA to Finance Act 2003. Broadly, the higher rates apply where, at the end of the day of the transaction:

• the buyer has a major interest in the purchased dwelling,
• the purchased dwelling is not subject to a lease with more than 21 years left to run granted to someone else,
• the buyer owns, or is treated as owning, another dwelling worth £40,000 or more, and
• the purchase is not a replacement of the buyer’s only or main residence.

For married couples and civil partners, Schedule 4ZA contains special rules that generally treat them as one unit unless they are separated in a way recognised by the legislation. In broad terms, that means a spouse’s property interests can be attributed to the other spouse unless they are separated under a court order, by a formal deed of separation, or in circumstances where the separation is likely to be permanent within the meaning of the legislation.

These spouse rules matter both for the higher rates analysis and, indirectly, for first-time buyer relief, because a higher rates transaction cannot qualify for relief under Schedule 6ZA.

Analysis

Step one is to ask whether the buyer has ever owned a dwelling personally. On these facts, the answer is no. If that were the only test, the buyer might appear to be a first-time buyer.

Step two is to ask whether the purchase is a higher rates transaction. This is where the spouse rules become decisive.

The spouse owns another dwelling and will keep it after the new purchase completes. Because the couple are only informally separated, SDLT does not automatically treat them as fully separate individuals for these purposes. The spouse’s ownership is therefore attributed to the buyer.

That means that at the end of the day of completion, the buyer is treated as owning an interest in:

• the newly purchased flat, and
• the spouse’s existing home.

So the buyer is treated as owning more than one dwelling.

Step three is to ask whether the purchase replaces an only or main residence. On these facts, the answer is no for SDLT higher rates purposes. The spouse’s existing home is not being sold. Because spouses are treated as one unit here, there is no qualifying disposal of the relevant main residence that would switch off the higher rates charge.

Step four is the consequence of that conclusion. If the purchase is a higher rates transaction under Schedule 4ZA, paragraph 1(7) of Schedule 6ZA prevents first-time buyer relief from applying.

So although the buyer has never owned property personally, they still do not get first-time buyer relief because SDLT treats the transaction as an additional dwelling purchase.

The Joint Borrower Sole Proprietor mortgage point does not improve the SDLT result on these facts. Nick’s analysis focused on the spouse’s ownership of the existing dwelling, not on the buyer being named on mortgage arrangements. The key issue is the attribution of the spouse’s property interest under the SDLT spouse rules.

If, however, the separation were formalised before the effective date of the purchase, the position could be different. In that case, the spouse’s property may no longer be attributed to the buyer. If the buyer then has no previous major interest in a dwelling anywhere in the world and all other conditions are met, first-time buyer relief may become available.

Where buyers argue that a property is uninhabitable or not suitable for use as a dwelling, it is important to note that the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. That authority confirms that not every property with defects will fall outside the dwelling rules. Truly serious condition issues are needed.

Outcome

On the facts described, the buyer does not qualify for first-time buyer relief.

The purchase is treated as a higher rates transaction because:

• the buyer is married or in a civil partnership,
• the separation is only informal,
• the spouse owns another dwelling, and
• that existing dwelling is not being sold as part of a replacement of a main residence.

Accordingly, higher rates SDLT apply rather than standard residential rates.

Practical Steps

If you are in a similar position, the practical points to check are:

• Confirm whether the property is in England or Northern Ireland, because SDLT applies there.
• Check whether you are married or in a civil partnership at the effective date of the transaction.
• Check whether any separation is legally formalised before completion, for example by a deed of separation or court order.
• Establish whether your spouse or civil partner owns another dwelling worth £40,000 or more.
• Consider whether there is a genuine replacement of an only or main residence, including whether the old residence is actually being disposed of.
• Ask your conveyancer to calculate SDLT on both the standard and higher rates basis before exchange, so you know the tax cost in advance.
• If you are considering formalising a separation, take family law advice as well as SDLT advice, because that step has wider legal consequences beyond tax.

Timing matters. SDLT is tested by reference to the effective date, usually completion. A change in marital or separation status after completion will not usually fix the SDLT position that applied on the day.

Conclusion

If you are married but only informally separated, your spouse’s property can still count against you for SDLT. That can make your purchase a higher rates transaction and block first-time buyer relief, even if you have never owned a home yourself. In the scenario discussed here, the higher rates apply unless the separation is formalised before the purchase completes.

Legal References Used

• Finance Act 2003
• Finance Act 2003, Schedule 4ZA
• Finance Act 2003, Schedule 6ZA
• Finance Act 2003, Schedule 6ZA, paragraph 1(7)
• 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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