Can you still claim an SDLT higher rates refund after the 12-month deadline?

Introduction

A common source of confusion with Stamp Duty Land Tax (SDLT) is the difference between the three-year rule for selling a previous main residence and the separate deadline for actually claiming a refund of the higher rates. Many buyers know they may be able to recover the extra SDLT if they replace their only or main residence, but they do not always realise that the refund claim itself must usually be made within a strict time limit.

This matters because missing the claim deadline can mean losing a substantial refund, even where the sale of the former home took place within the permitted three-year period.

The Question

A buyer purchased a new home and paid SDLT at the higher rates because they still owned their previous residence at the time of purchase. They later sold the previous residence within three years, so in principle they appeared to qualify for a refund of the higher rates element.

However, they did not submit the refund claim within 12 months of the sale of the former home. They had also been unwell and had not dealt with paperwork promptly. The question was whether there was still any way to obtain the refund after the deadline had passed.

Nick’s Explanation

Nick’s view was that this is a very difficult position. In anonymised form, his key point was:

“There are options for providing a reasonable excuse if, for example, you dispose of your former property more than three years after buying the new main residence. However, as far as I know, there is no recourse if you have missed the deadline for submitting your refund application.”

He also noted that, depending on the circumstances, a person might consider whether they were so seriously unwell or incapacitated that they were unable to manage their affairs at all. But he described that as a long shot and was not optimistic.

That is a fair summary of the position. The law gives a route to relief where the old residence is sold late in some cases, but that is different from missing the statutory deadline for making the refund claim once the sale has already happened.

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 new dwelling before disposing of their previous only or main residence, the higher rates may apply at the time of purchase.

If the buyer later disposes of the previous only or main residence and the conditions are met, they may be entitled to a repayment of the higher rates element.

The relevant time limits are important:

• There is a general rule allowing the disposal of the previous main residence within three years of the purchase of the new one.
• But the refund claim itself must normally be made by the later of:
  • 12 months beginning with the effective date of the sale of the previous main residence, and
  • 12 months beginning with the filing date for the SDLT return for the new purchase.

These are separate rules. Meeting the three-year disposal rule does not remove the need to make the claim within the claim deadline.

In some situations, the legislation allows for a later disposal of the former residence where the buyer had a reasonable excuse for not disposing of it within the normal three-year period. That is not the same as extending the time for claiming a refund after the former residence has already been sold.

Analysis

The position can be analysed in four steps.

1. First, ask whether the buyer paid the higher rates on the new purchase because they still owned their previous home. If yes, the starting point is that the extra SDLT was properly charged at completion.

2. Second, ask whether the previous only or main residence was sold within the permitted period. If it was sold within three years, that usually satisfies the disposal timing requirement for a refund.

3. Third, ask whether the refund claim was filed in time. This is where many claims fail. The legislation imposes a separate deadline, usually 12 months from the sale of the previous residence, subject to the “later of” rule mentioned above.

4. Fourth, if the deadline was missed, consider whether there is any statutory mechanism that saves the claim. This is the difficult part. The better-known “reasonable excuse” provisions tend to relate to the delay in disposing of the former residence, not to a late refund application after that disposal has already happened.

That means a buyer can be fully within the three-year disposal period and still lose the refund because the application itself was not made in time.

Where illness is involved, the only possible argument may be an exceptional one: that the person was so seriously incapacitated that they could not manage their affairs and that this should affect HMRC’s approach. But the legal basis for reviving an out-of-time refund claim is weak, and success is far from certain.

In practice, if someone was merely delayed, overwhelmed or unaware of the rule, that is unlikely to be enough. If, however, they were genuinely incapable of handling their affairs for a significant period, they may at least wish to put the evidence before HMRC and ask whether any concessionary treatment is possible. Even then, the prospects are limited.

This issue is different from the “uninhabitable” or “not suitable for use” line of SDLT cases. In that area, the condition thresholds are now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. That authority concerns whether a property was suitable for use as a dwelling, not whether a late refund claim can be accepted.

Outcome

If a buyer sold their former main residence within three years but failed to submit the SDLT refund claim within the statutory claim window, the position is usually that the refund is lost.

There may be a narrow and difficult argument where the buyer was genuinely incapacitated and unable to manage their affairs, but this is not a reliable route and should be treated as exceptional.

Practical Steps

If you are in this position, the sensible next steps are:

• Check the exact completion date of the new purchase.
• Check the exact completion date of the sale of the former main residence.
• Work out the statutory deadline by applying the “later of” test:
  • 12 months from the sale of the former residence, or
  • 12 months from the filing date for the SDLT return on the new purchase.
• Confirm whether a refund claim was in fact submitted, even informally, before that deadline.
• If the deadline was missed and serious illness was involved, gather medical evidence showing the nature, severity and timing of the incapacity.
• Make a written approach to HMRC setting out the facts clearly and enclosing supporting evidence, while recognising that the prospects may be poor.
• Take specialist SDLT advice promptly if the amount at stake is significant.

The key practical lesson is that the three-year sale rule and the refund claim deadline are not the same thing. Both must be satisfied.

Conclusion

In most cases, missing the SDLT higher rates refund deadline is fatal to the claim, even if the previous main residence was sold within three years. Serious incapacity may justify asking HMRC to consider the case, but it is an uphill argument. The safest approach is always to calculate the refund deadline separately and make the claim as soon as the former home is sold.

Legal References Used

• Finance Act 2003
• Schedule 4ZA, Finance Act 2003
• 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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