Can you get a 3% SDLT refund if you sold your previous home after three years because of delays?

Introduction

Many buyers pay the higher rates of Stamp Duty Land Tax (SDLT) when they buy a new home before selling their old one. The usual rule is that the extra 3% can be reclaimed if the old main residence is sold within three years. A common question is whether HMRC can still allow a refund where the sale happened after that deadline because of serious delays or difficult circumstances.

This issue often arises where the previous property was hard to sell because of tenancy problems, administrative delays, market disruption or practical complications linked to the pandemic. The difficulty is that the legislation gives HMRC a limited discretion, and HMRC applies that discretion narrowly.

The Question

A married couple bought a new home and paid the higher rates of SDLT because one of them still owned a previous dwelling at the time of purchase. They later sought a refund of the 3% surcharge on the basis that they had intended to dispose of their former main residence, but the sale did not complete within the normal three-year period.

The reasons put forward included delays connected with the sale process, disruption said to be linked to COVID-19, and difficulties in obtaining vacant possession from tenants. HMRC refused the refund request and said there was no right of appeal against its decision on whether the circumstances were exceptional.

Nick’s Explanation

Nick’s explanation was that the higher rates were correctly charged at the time of purchase because the buyers still owned another dwelling and had not yet replaced their only or main residence.

He explained that the normal refund route depends on the old main residence being sold within three years of buying the new one. In this case, that deadline had passed.

He then identified the only possible route to a late refund: Finance Act 2003, Schedule 4ZA, paragraph 3(7A)(b). That provision allows a longer period where HMRC is satisfied that the purchaser would have sold within the three years but was prevented from doing so by exceptional circumstances that could not reasonably have been foreseen.

Nick’s key point was that the wording “if HMRC are satisfied” gives HMRC the decision-making discretion. In practical terms, that means the issue is not simply whether the buyers had genuine difficulties, but whether HMRC accepts that those difficulties were both exceptional and unforeseeable, and that they actually prevented the sale within the statutory period.

He also noted that HMRC’s guidance at SDLTM09807 sets a very high threshold. The guidance says these cases will be rare and well outside the norm. On that approach, delays caused by third parties, tenant-related problems, and general market or pandemic-related difficulties will often be treated as unfortunate but not exceptional.

The Law

The higher rates of SDLT for additional dwellings are set out in Finance Act 2003, Schedule 4ZA. Broadly, where a person buys a dwelling and at the end of the day owns another dwelling, the higher rates may apply unless the purchase is a replacement of the buyer’s only or main residence.

Where the new home is bought before the old main residence is sold, the higher rates may still be payable at completion. A refund can then be claimed if the old main residence is disposed of within the permitted period.

That permitted period is normally three years. However, Finance Act 2003, Schedule 4ZA, paragraph 3(7A)(b) provides that the period can be extended:

“if HMRC are satisfied that the purchaser… would have disposed of the major interest in the sold dwelling within that three year period but was prevented from doing so by exceptional circumstances that could not reasonably have been foreseen, such longer period as HMRC may allow…”

This is an important provision, but it is narrow. It does not create an automatic right to an extension. It allows HMRC to grant one if it is satisfied on the facts.

HMRC’s guidance at SDLTM09807 explains how it approaches this discretion. The guidance indicates that exceptional circumstances are expected to be very rare. HMRC generally looks for events that are genuinely outside the ordinary risks and delays of buying and selling property.

Where a case involves a property said to be uninhabitable or not suitable for use as a dwelling, the threshold is also now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. That case underlines that SDLT dwelling tests are applied strictly, and ordinary disrepair or serious inconvenience may still fall short of the legal standard required.

Analysis

The analysis usually has four stages.

First, was the higher rate correctly charged on the purchase date? If, at the end of that day, the buyers still owned another dwelling and had not yet replaced their only or main residence, the answer is usually yes.

Second, was the previous main residence sold within three years? If yes, the refund claim normally succeeds if the other statutory conditions are met. If not, the claim can only proceed under the exceptional-circumstances extension.

Third, do the facts amount to “exceptional circumstances that could not reasonably have been foreseen”? This is where most late claims fail. HMRC distinguishes between:

• events that are truly extraordinary and outside normal property risks; and
• events that are difficult, expensive or frustrating, but still part of the ordinary hazards of ownership, letting and conveyancing.

Fourth, did those circumstances actually prevent the sale within the three-year period? It is not enough to show that the circumstances made the sale harder or slower. The evidence must support the stronger proposition that, but for those exceptional and unforeseeable circumstances, the sale would have completed in time.

Applying that framework to the scenario described:

• Delays caused by administrative backlogs or third parties are usually not enough on HMRC’s published view. They may be serious, but HMRC commonly treats them as part of the normal risk of property transactions.
• General disruption linked to COVID-19 is not automatically exceptional for these purposes, especially where the relevant three-year period ran after the initial legal shutdown of the property market had ended.
• Difficulties in obtaining vacant possession from tenants are also unlikely, by themselves, to meet the test. HMRC tends to regard tenant and possession issues as foreseeable risks of owning a let property.

That does not mean every such claim must fail. A case may be stronger if there was a specific legal barrier, a public authority restriction, or some truly unusual event that made sale impossible rather than merely delayed. But on the facts described, HMRC’s refusal is consistent with its current guidance.

The point about appeal rights also matters. Where the legislation leaves the question to whether “HMRC are satisfied”, there may be no ordinary statutory appeal on the merits of HMRC’s evaluative judgment. That does not necessarily remove every possible public law remedy in every case, but it does mean there is generally no straightforward tribunal appeal simply because the taxpayer disagrees with HMRC’s view of what counts as exceptional.

Outcome

The practical conclusion is that a late refund claim for the 3% SDLT surcharge is difficult to win unless the facts fit the statutory extension very closely. If the old main residence was sold after the three-year deadline, the buyer must show exceptional circumstances that could not reasonably have been foreseen and that actually prevented the sale in time.

On the kind of facts described here, HMRC is likely to say that the circumstances were unfortunate but not exceptional in the legal sense required by Finance Act 2003, Schedule 4ZA, paragraph 3(7A)(b).

Practical Steps

If you are assessing a similar case, the useful steps are:

• Confirm the exact purchase date of the new home and calculate the end of the normal three-year period.
• Identify the date on which the previous main residence was actually sold.
• Gather evidence showing what stopped the sale and when those events occurred.
• Separate ordinary transaction delays from anything genuinely exceptional and unforeseeable.
• Check whether there was any legal or public authority restriction that made sale impossible, rather than merely difficult.
• Prepare a clear chronology showing why the sale would probably have completed in time but for the specific event relied on.
• Review HMRC guidance at SDLTM09807 to see whether the facts align with HMRC’s narrow interpretation.
• If the argument depends on the property being uninhabitable or not suitable for use, assess that point carefully in light of Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, because the threshold is now relatively high.

Conclusion

You can sometimes obtain a refund after the three-year deadline, but only in rare cases. The law gives HMRC a discretion, and HMRC applies it strictly. Delays, tenant problems and general disruption will often be treated as part of the normal risks of property ownership and sale, not as exceptional circumstances justifying a late SDLT refund.

Legal References Used

• Finance Act 2003, Schedule 4ZA
• Finance Act 2003, Schedule 4ZA, paragraph 3(7A)(b)
• HMRC Stamp Duty Land Tax Manual, SDLTM09807
• 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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