Can you avoid the higher SDLT rates if you buy a new main home but move in later?

Introduction

People often ask whether they can still claim the Stamp Duty Land Tax (SDLT) replacement of main residence rules if they buy a new home now but do not move in straight away. This commonly happens where a job relocation is delayed, temporary accommodation is needed, or the new property may be let for a short period before occupation.

The key question is whether the new property is genuinely being acquired as the buyer’s next only or main residence, even though actual occupation will happen later.

The Question

A homeowner owns their current home and also owns other residential rental properties. They plan to sell their present home and buy another property to live in as their new main residence. However, they will not move into the new property until several months later because of a work relocation.

During the gap, they may live in one of their rental properties or stay with family. They may also grant a short-term letting of the new property to help with costs until they can move in. They want to know whether that still counts as an intended replacement of their main residence for SDLT purposes, so that the 5% higher rates for additional dwellings do not apply.

Nick’s Explanation

Nick’s explanation was that the issue turns on the replacement of main residence rules in Schedule 4ZA to the Finance Act 2003. In summary, where a buyer owns more than one dwelling at the end of the effective date of the transaction, the higher rates can still be avoided if the purchase is a genuine replacement of the buyer’s only or main residence.

He explained that a delay in moving in does not automatically prevent the new property from being treated as the replacement main residence. The important points are:

• the previous main residence is being sold,
• the new property is intended to become the buyer’s only or main residence, and
• the buyer moves in within a reasonable period once circumstances allow.

Nick also noted that temporary letting during the interim period does not necessarily defeat the claim, provided the evidence shows that the buyer’s real and continuing intention is to occupy the property as their main home as soon as reasonably possible.

His practical emphasis was that intention is a question of fact. A buyer should therefore keep evidence showing the reason for the delay and the temporary nature of any letting or alternative living arrangements.

The Law

The higher rates of SDLT for additional dwellings are contained in Schedule 4ZA to the Finance Act 2003.

Broadly, the higher rates apply if, at the end of the day of the purchase, the buyer owns more than one dwelling and is not replacing their only or main residence.

Where a buyer sells or has sold their previous only or main residence and buys another dwelling intended to be their new only or main residence, the replacement exception can apply. This means the purchase may be taxed at ordinary residential rates rather than the higher additional dwelling rates.

The legislation recognises that occupation does not always happen on the day of completion. A buyer may still be treated as replacing their main residence if they intend to occupy the new dwelling as their only or main residence and do so within a reasonable period.

Whether that test is met depends on the facts. HMRC and the legislation look at the substance of the arrangement, not just what the buyer says they intended.

This issue is different from cases about whether a property is unsuitable for use as a dwelling. In that separate area, the threshold is now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. That case is relevant where a buyer argues that a property was not residential because it was uninhabitable. It does not set the test for replacement of a main residence, but it is important not to confuse the two issues.

Analysis

The position can be analysed in stages.

First, if the buyer still owns rental properties after buying the new home, they will own more than one dwelling at the end of the transaction. That would normally point towards the higher rates applying.

Second, the key saving provision is whether the buyer is replacing their only or main residence. If the existing home is sold and the new property is intended to take its place as the new main home, the replacement rules may apply even though other rental properties are retained.

Third, a delayed move-in is not fatal by itself. The law allows a reasonable period before occupation. Renovation works are a common example, but they are not the only acceptable reason. A work relocation or similar practical obstacle can also support a genuine delay.

Fourth, temporary living elsewhere during the gap does not automatically prevent the new property from qualifying. Staying with family or in another property for a short period may be consistent with a genuine intention to occupy the new home later.

Fifth, a short-term letting of the new property is a risk factor, but not necessarily a disqualifying one. The question is whether the letting is truly temporary and consistent with the buyer’s settled plan to move in as soon as reasonably possible. A short fixed-term arrangement may be easier to explain than an open-ended letting or a series of renewals.

Sixth, evidence matters. HMRC may test whether the claimed intention was real. Helpful evidence may include:

• documents relating to the job relocation,
• completion of the sale of the previous main residence,
• plans showing when occupation of the new property is expected,
• short-term tenancy terms if the property is let temporarily,
• evidence that personal occupation follows as planned, and
• general conduct consistent with making the property the buyer’s home.

Seventh, the longer the delay, the more likely HMRC is to question the position. A modest delay with a clear reason is easier to support than a long or uncertain delay. If the buyer’s circumstances change and they no longer plan to move in, the replacement analysis may fall away.

Outcome

On these general facts, the new property is likely to qualify as a replacement of the buyer’s only or main residence, so the 5% higher SDLT rates may not apply.

That conclusion is strongest where:

• the previous main home is sold,
• the buyer has a clear and genuine intention to live in the new property as their main residence,
• the delay is explained by a real practical reason such as a job move, and
• any letting of the new property is genuinely temporary and supported by evidence.

The result is still fact-sensitive. The buyer’s intention must be genuine and their actions must match it.

Practical Steps

Anyone in this position should take the following steps:

• keep evidence showing why moving in is delayed, such as relocation documents,
• retain records of the sale of the previous main residence,
• if the new property is let, make sure the arrangement is clearly temporary and documented,
• avoid conduct suggesting the property is being acquired mainly as an investment,
• move in as soon as reasonably possible once the obstacle ends, and
• keep a timeline of events in case HMRC later asks for an explanation.

If there is any unusual feature, such as a long delay, repeated lettings, or uncertainty about whether the previous home counts as the main residence, specialist SDLT advice should be taken on the detailed facts.

Conclusion

A delayed move into a newly purchased home does not automatically trigger the higher SDLT rates. If the old main residence is being replaced, the new property is genuinely intended to become the buyer’s main home, and the buyer moves in within a reasonable period, the replacement of main residence rules can still apply. Temporary letting may be possible, but the buyer should keep clear evidence that the property was always intended to become their home.

Legal References Used

• Finance Act 2003, Schedule 4ZA
• 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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