Reclaiming the extra stamp duty when you buy before you sell

Guide · Published 25 August 2026 · Reviewed 25 August 2026 · By Vincent Catt

The two deadlines, which is what catches people

This is the single most important thing on the page, so it comes first.

People understand the first deadline. You have a period in which to sell your previous main residence, and everyone remembers roughly how long that is. What is far less well known is that once the sale completes, a second and separate clock starts for actually submitting the claim, and it is shorter than the first.

Sell the old house comfortably inside the first window, then let a year drift past because life is busy and the refund is not urgent, and the money is gone. The sale being in time does not preserve the claim.

The practical answer is to ignore both clocks. Submit the claim in the days after your sale completes, while the paperwork is in front of you and your conveyancer is still engaged. There is no advantage whatsoever in waiting, and doing it immediately makes both deadlines irrelevant.

Who can claim

Broadly, the refund exists for people who were genuinely moving house but whose transactions did not line up. The conditions vary in detail but share the same shape across the three tax systems.

You need to have owned and lived in the previous property as your only or main residence, generally at some point in the three years before buying the new one. You need to have disposed of it. And you need to be occupying, or intending to occupy, the new property as your only or main residence.

What does not qualify is just as important. A property you owned but never genuinely lived in will not do, so a buy-to-let, a holiday home or an inherited house you never occupied does not create a refund when you sell it. Selling only part of your interest in the former home generally does not count as disposing of it either.

What "main residence" actually means

This is where claims most often fail, and it is worth understanding before you apply rather than after you are refused.

There is no minimum period written into the rules, which sounds helpful but is not. HMRC treats residence as a question of quality rather than time: the property must have had the character of a home, with a degree of permanence and an expectation that living there would continue. Staying somewhere briefly between moves, or keeping a token presence, does not make it a main residence.

You also cannot simply nominate whichever property produces the better tax outcome. Where someone has lived in more than one place, the authorities look at the facts, and the sort of evidence that matters is council tax records, utility accounts, where you were registered to vote and where your post went.

A former main residence outside the UK can qualify, provided the other conditions are met. What matters is ownership, genuine occupation and disposal, not the country. You will need evidence that would satisfy the authority, typically a completion statement showing the sale and how the figure was arrived at.

The deadlines by nation

Read this table as a description of how the system is structured rather than as your own dates. The second column is the one people miss.

Scotland allows no discretion

The three systems differ sharply on what happens when you miss the sale window, and this is not a detail.

In England and Northern Ireland, HMRC has a discretion to accept a late claim where exceptional circumstances prevented the sale, the circumstances could not reasonably have been foreseen, the property has now been sold, and it was sold without further delay once the obstacle lifted. The bar is high. HMRC's examples involve things like public authority restrictions, and it does not normally treat a sale falling through, a chain collapsing, a disagreement over price or simple difficulty finding a buyer as exceptional. There is no way to get this agreed in advance; you apply after the sale and explain.

In Wales, rather than a general discretion there are defined statutory categories of extension, introduced by regulations that came into force on 12 July 2024, covering situations such as sales prevented by emergency restrictions or by fire safety defects.

In Scotland, Revenue Scotland's guidance is explicit that it cannot consider exceptional circumstances at all for ADS repayment. If the sale falls outside the applicable period, there is no discretion to appeal to. That makes the Scottish deadline harder than the others and makes claiming promptly more important, not less.

How to claim, and what you will need

In every case you can do this yourself. None of the authorities require a solicitor, and none charge a fee.

England and Northern Ireland

HMRC has an online service for applying for a refund of the higher rates, with a postal form as the alternative. You will need the buyer's details, the effective date of your purchase, the unique transaction reference number from the original return, details of the old property and its sale, the amount paid and the amount claimed, and bank details. If an agent is to receive the money rather than you, HMRC requires a covering letter and your signed authority.

HMRC does not publish a standard processing time for this route, so timing varies, particularly if the claim is late or picked for checking.

Scotland

If you are still inside the twelve month amendment window, the agent who filed the original return can usually amend it online, which is the simplest route. Outside that window, or where a different agent is now involved, there is a separate ADS repayment claim form submitted with supporting documents. Revenue Scotland asks for proof of sale and evidence that you occupied the property as your previous main residence, such as council tax or utility records.

Revenue Scotland aims to process repayment claims within about ten working days, and it does pay interest on ADS repayments.

Wales

The Welsh Revenue Authority provides an online refund form, which can be submitted by you, by the conveyancer who acted on the purchase if still instructed, or by anyone else you authorise. You will need the twelve digit unique transaction reference number, the effective date of the purchase, the former home's address, details of all buyers including whether any are married, your calculated refund, evidence of the sale and bank details. For a property in England or Wales the evidence is typically a signed and dated transfer or contract of sale; for property elsewhere, a completion statement.

The WRA says claims usually take fifteen to twenty working days, longer if it needs more information.

Couples, joint buyers and inherited shares

These are the areas where an apparently straightforward claim turns out not to be, so they are worth checking before you apply.

Married couples and civil partners are generally treated as owning each other's property for these purposes, even where only one name is on the deeds. That cuts both ways: it can trigger the surcharge on a purchase you thought was unaffected, and it can also mean the former main residence qualifies if it was owned by your spouse rather than you. The treatment differs where a couple are legally separated, or separated in circumstances likely to be permanent.

Joint buyers need care in Scotland in particular. Where only one buyer brought the transaction into ADS charge, generally only that buyer needs to satisfy the disposal and previous residence conditions, but all buyers must occupy the new property as their only or main residence. Where more than one buyer independently triggered the charge, the conditions can apply to each of them.

Inherited property is subject to its own rules, which concern whether the surcharge applies in the first place rather than relaxing the refund conditions. In England there is a disregard for inherited interests in certain circumstances where the share held by you and your spouse did not exceed half. In Scotland, from April 2024 a share in a jointly owned property counts only where that individual share is worth at least £40,000. Both are more intricate than a summary can carry, and are worth checking directly if they apply to you.

Why claims are refused

Knowing the failure modes in advance is more useful than a checklist of what to send.

• The old property was owned but never genuinely lived in, or was occupied only briefly and without the permanence that makes somewhere a home.
• Only part of the interest was disposed of rather than the whole of it.
• The sale fell outside the applicable window, including in Scotland where the 18 month period applied rather than 36.
• The new property is not the buyer's only or main residence, or in a joint purchase one of the buyers does not occupy it as theirs.
• A spouse or civil partner still owns an interest that means the higher rate conditions continue to apply.
• The claim was submitted after the second deadline, even though the sale itself was comfortably in time. This is the avoidable one.
• The refund was calculated wrongly, using the wrong historic rates, or in Scotland the wrong ADS figure where Multiple Dwellings Relief was claimed.
• The evidence does not actually establish ownership, occupation or disposal.

A warning about reclaim companies

You will find firms advertising to recover stamp duty on a commission basis, and some contact recent buyers directly. A few do legitimate work on genuinely complex cases. The industry as a whole warrants caution.

The central point is about liability. Using an agent does not move the tax responsibility away from you. HMRC's guidance is clear that if a refund is paid and the claim is later found to be wrong, you repay it in full with any interest due. The firm keeps its commission. You carry the risk.

HMRC issued a public warning in 2025 about misleading repayment claims, particularly those arguing that a property was in such poor repair it should not have been taxed at residential rates, following the Court of Appeal's decision in Mudan. HMRC's position is that properties needing repair remain chargeable at residential rates, and it warned buyers about agents advertising these claims.

If you are approached, the useful questions are which specific statutory condition the firm says you meet, whether they will put the calculation in writing, whether the fee is charged on the gross refund or only on what is actually recovered, whether VAT is added, and who receives the money from the authority. Read any authority or indemnity wording before signing it, and keep copies of whatever is submitted in your name.

For the replacement of main residence claim described on this page, none of that is necessary. It is a form you can complete yourself, and a commission-based fee is not evidence that a claim is valid.

Where to check your own position

Go to the authority for the nation you bought in rather than to any summary, including this one. For England and Northern Ireland that is HMRC's guidance on applying for a refund of the higher rates of Stamp Duty Land Tax. For Scotland it is Revenue Scotland's Additional Dwelling Supplement pages. For Wales it is the Welsh Revenue Authority's guidance on claiming a refund of Land Transaction Tax higher rates.

If your conveyancer handled the original purchase, they will hold the unique transaction reference number you need, and asking them to confirm your deadlines in writing is a reasonable request. Not all of them raise the refund unprompted, so raise it yourself.

This guide is general information, not tax or legal advice. It describes the position as at 25 August 2026, checked against HMRC's Stamp Duty Land Tax Manual and refund guidance, Revenue Scotland's ADS technical guidance, and Welsh Government and Welsh Revenue Authority guidance on LTT higher rates. Deadlines and conditions depend on your specific transaction and can change at any UK, Scottish or Welsh fiscal event. Confirm your own dates with the relevant authority before relying on them, and take advice from a tax adviser or your conveyancer where anything is unclear or a deadline is close.