Can HMRC accept a late SDLT higher rates refund claim if illness or other events outside your control caused the delay?

Introduction

Many homeowners pay the higher rates of Stamp Duty Land Tax when they buy a new main residence before selling their old one. In the usual case, they can later reclaim the extra 3% if they sell the former home within the statutory time limit and meet the other conditions.

A common problem arises where the reclaim is made late. People then want to know whether HMRC can still accept the refund claim if the delay was caused by illness, personal circumstances, or other factors outside their control. That is the issue addressed here.

The Question

A taxpayer asked whether a doctor’s letter, and possibly supporting evidence from a long-term employer, would help challenge HMRC’s refusal of a Stamp Duty refund claim. The background was that the taxpayer believed circumstances outside their control had affected the timing of the reclaim and wanted to know whether it was still worth pursuing the matter with HMRC.

Nick’s Explanation

Nick’s view was that the reclaim was still worth pursuing. In anonymised form, his key point was:

“I think it is worth pursuing this reclaim. Once all the documents and HMRC correspondence are in one place, an argument can be prepared that supports and strengthens the points already made to HMRC, while ensuring it aligns with the legislation and any relevant case law supporting the position that factors outside the taxpayer’s control affected the timing of the claim.”

That approach is sensible. Before anyone can assess the prospects properly, it is important to gather the refusal letter, the reclaim correspondence, and the core purchase and sale documents. Without the HMRC refusal letter, it is difficult to know whether HMRC rejected the claim because:

• the claim was out of time,
• the former home was not disposed of in time,
• the property did not qualify as a replacement of a main residence, or
• HMRC disputed the factual explanation for the delay.

Nick also focused on building the argument around the legislation and any supporting authorities, rather than relying only on sympathy. That is the right way to approach a tax appeal.

The Law

The higher rates of SDLT for additional dwellings are set out in Schedule 4ZA to the Finance Act 2003. Broadly, where a buyer purchases a dwelling while still owning another dwelling, the higher rates may apply.

If the new dwelling is intended to replace the buyer’s only or main residence, a refund of the extra SDLT may later be available if the previous main residence is disposed of within the permitted period and the other statutory conditions are met.

The rules on claiming the refund are governed by Schedule 4ZA to the Finance Act 2003 and HMRC’s administrative process for repayment claims. In practice, the buyer usually needs to show:

• the higher rates were paid on the purchase of the new dwelling,
• the purchased dwelling became the replacement main residence,
• the previous main residence was sold or otherwise disposed of within the statutory period, and
• the refund claim was made within the required time limit.

Where the claim is late, the legal position becomes more difficult. HMRC does not have a broad free-standing discretion to waive statutory time limits simply because the taxpayer has a good reason. The exact route forward depends on the nature of the decision, the statutory wording, and whether there is any available review or appeal mechanism.

If the issue concerns whether the taxpayer met a statutory deadline, the taxpayer usually needs to identify a legal basis for HMRC to revisit the matter or for the tribunal to intervene. That may involve arguments about the correct construction of the legislation, the nature of the claim made, whether a valid claim was in fact submitted in time, or whether procedural fairness points arise from HMRC’s handling of the matter.

If the wider factual background includes an argument that the purchased property was uninhabitable or not suitable for use as a dwelling, the current threshold is relatively high. Following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, a property will not fall outside the dwelling rules merely because it needs repair, modernisation, or substantial works. The condition must be serious enough to meet the now stricter standard applied by the Court of Appeal.

Analysis

The starting point is to identify exactly what HMRC refused.

If HMRC refused because the old main residence was not sold within the statutory replacement window, medical evidence about the taxpayer’s personal position may have limited value unless it directly explains why a legally relevant step could not be taken. Even then, the legislation may leave little room for HMRC to depart from the deadline.

If HMRC refused because the refund claim itself was submitted late, the next question is whether there is evidence that:

• a valid claim was actually made earlier than HMRC accepts,
• HMRC overlooked or mischaracterised earlier correspondence,
• the taxpayer substantially complied with the claim requirements in time, or
• there is another statutory or procedural route to challenge the refusal.

That is why the full HMRC correspondence matters. A taxpayer may think they made a late claim, but the paper trail sometimes shows that they notified HMRC earlier than expected, or that HMRC treated an earlier letter too narrowly.

As for supporting evidence, a doctor’s letter can help if the case depends on proving that serious illness prevented the taxpayer from dealing with the claim or related steps. An employer’s letter may also help if it confirms relevant facts such as prolonged absence, incapacity, or exceptional circumstances affecting the taxpayer over the period in question.

However, evidence is only useful if it connects to a legal issue that matters. A sympathetic explanation is not enough on its own. The evidence must support a point that can make a difference under the legislation or under HMRC’s decision-making process.

The core documents are also important:

• the purchase transfer and completion documents,
• the SDLT return and SDLT certificate,
• the sale contract for the former home, and
• all letters or emails to and from HMRC.

These documents establish the timeline. In SDLT refund cases, the timeline is usually decisive.

If the taxpayer is also considering whether the property was unsuitable for use as a dwelling at purchase, that argument should be treated with caution. After Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799, the threshold is now relatively high. Ordinary disrepair, dated condition, or a need for renovation will often not be enough.

Outcome

The practical conclusion is that a late SDLT higher rates refund claim may still be worth reviewing in detail, especially where HMRC may have misunderstood the facts or where earlier correspondence might amount to a valid claim.

But a taxpayer should not assume that illness or other difficult personal circumstances will automatically extend a statutory deadline. The success of any challenge depends on the exact reason for HMRC’s refusal, the wording of the legislation, and the documentary timeline.

A doctor’s letter or employer evidence may strengthen the factual narrative, but it will only carry real weight if it supports a legally relevant point.

Practical Steps

If you are in this position, gather the following before assessing the merits of an appeal or renewed submission:

• HMRC’s refusal letter or decision notice,
• every letter or email sent to HMRC about the reclaim,
• every response received from HMRC,
• the TR1 or transfer for the new property,
• the purchase contract,
• the completion statement,
• the SDLT return details and SDLT5 certificate if available,
• the sale contract for the former main residence, and
• any evidence explaining the delay, such as medical evidence or employer confirmation.

Then work through the case in this order:

1. Confirm the purchase date of the new property.
2. Confirm the disposal date of the former main residence.
3. Confirm when the reclaim was first made to HMRC.
4. Identify HMRC’s exact stated reason for refusing it.
5. Check whether any earlier correspondence could amount to a valid claim.
6. Assess whether the supporting evidence links directly to a legally relevant issue.

If the refusal turns on a technical point, the wording of the legislation and the chronology should be reviewed carefully before deciding whether to seek a review, appeal, or fresh submission.

Conclusion

A late SDLT refund claim is not necessarily hopeless, but the case must be built around the law and the timeline, not just the hardship of the situation. Medical or employment evidence can help, but only where it supports a point that matters legally. The first step is always to obtain and review the full HMRC decision and the complete transaction papers.

Legal References Used

• Finance Act 2003
• 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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