Sold your old home before filing your LTT return?
In short
If you sell your old main home before filing the LTT return for your new home, you may use the normal LTT rates from the outset.
- The sale must have completed by the filing date.
- The return must not already have been made.
- The wider main-home replacement conditions still apply.
Scroll down for the full analysis.
Read the original guidance here:
Sold your old home before filing your LTT return?
If you bought a new home in Wales before selling your old one, you may appear to owe higher Land Transaction Tax (LTT). However, if you sell your old main home before filing the LTT return, you may be able to apply the normal rates from the start. Land Transaction Tax replaced stamp duty land tax in Wales in 2018.
What this rule is about
The higher LTT rates can apply if you own more than one home at the end of completion day. This often affects people who buy their next home before completing their sale.
Normally, the buyer pays the higher amount first. They may then be able to correct the position after they sell the old home. This rule instead focuses on the simpler timing point: you sell the old home before filing the LTT return.
That distinction can matter a lot. It can allow the return to reflect the final position straight away, instead of showing higher rates first.
What the official source says
Welsh Revenue Authority guidance explains that a buyer can assess the purchase using the normal residential LTT rates if they sell the old main home within the filing period and have not yet made the return. The legislation supports this approach where the sale takes place on or before the filing date and the buyer has not filed the return.
- You bought a new home that you intend to use as your only or main home.
- You would otherwise own another home at the end of the new purchase’s completion day.
- The old home is sold by the filing date for the new purchase’s LTT return.
- You have not made that LTT return before the old-home sale.
- The other conditions for replacing your main home are met.
Keep one timing rule firmly in mind: you must complete the old-home sale before submitting the return. A planned sale is not enough.
The guidance makes this especially clear when both events happen on the same day. You cannot file first and then rely on a sale that completes later that day.
What this means in practice
Do not treat your expected sale-completion day as if completion has already occurred. For this rule, the order of events matters.
If your old-home sale completes before you file the return, the law lets you treat the new home as a replacement from the date you bought it. If you file before the sale, you cannot use that route for the initial return.
- Check whether your old-home sale has completed before you submit the LTT return.
- Give your conveyancer the actual completion information, not an expected date.
- Keep the sale and purchase completion statements.
- Keep a copy of the submitted LTT return.
- Confirm that you genuinely intend the new home to be your main home.
This is the part people can miss. You may prepare a return before the old sale completes, but you should not submit it on the normal-rate basis until that sale has happened.
How to analyse it
Start with the facts in date order. The key question is not simply whether you owned two homes. Ask what had happened when you sent the return.
- What was the effective date of your new-home purchase?
- At the end of that day, did you own an interest in another home?
- Was that other home your only or main home at the relevant time?
- Did you intend the new home to become your only or main home?
- What was the effective date of the old-home sale?
- Did that sale happen on or before the filing date for the new purchase?
- Had you already submitted the LTT return when the sale completed?
- Do the remaining replacement-of-main-home conditions apply?
Answer the last two questions carefully. This rule focuses particularly on them.
Example
Amira buys a new home in Wales while she still owns the house she has been living in. Her old-house sale completes on Friday. She waits until after that completion before sending the LTT return for the new home. If the other replacement conditions are met, she can assess the new purchase using the normal residential rates rather than the higher rates.
Change one fact and the answer changes. If Amira submits the return on Friday morning and the old-house sale completes that afternoon, she cannot treat the sale as already completed when making that return.
Why this can be difficult in practice
Property chains can make timing seem obvious until something slips. A sale can be agreed, documents can be signed, and money can be ready, but completion may still not have happened when someone sends the return.
You might think the planned sale date settles the matter. It does not. What matters is when the old-home sale actually completes and whether you had already made the return.
- An exchanged contract is not the same thing as a completed sale for this rule.
- A sale expected later that day cannot support a return filed earlier that day.
- Moving into the new property is relevant, but it does not by itself prove it is your main home.
- A property may be an old main home even if it was not your only property.
- The wider main-home replacement test still applies after the timing test is met.
The Welsh Revenue Authority page provides guidance, rather than the law itself. The statutory wording in Schedule 5 is the controlling source if there is a conflict.
Key takeaways
- Sell your old main home before filing the LTT return if you want to use this route.
- A sale due later the same day is not enough.
- Keep clear evidence of both completion dates and the submitted return.
Technical analysis
For advisers, and for anyone who wants to check the law behind this page. You do not need this section to understand the guidance above.
Legislation
- LTTA 2017 section 24 — higher rates residential property transactions under schedule 5
- LTTA 2017 Schedule 5 para 3 — when higher LTT rates can apply
- LTTA 2017 Schedule 5 para 5 — owning another home at the end of completion day
- LTTA 2017 Schedule 5 para 8 — selling an old main home after buying a new one
- LTTA 2017 Schedule 5 para 23 — return treatment after selling the former main home
Official guidance
The pages below are the Welsh Revenue Authority’s guidance. Guidance is not law. It sets out how the Welsh Revenue Authority reads the legislation, and it is not binding on you, on a tribunal or on a court. Where guidance and the legislation differ, the legislation wins. the Welsh Revenue Authority can also change or withdraw guidance, and it may not cover your facts.
Where this is not settled
- Whether a property was a person’s only or main home can depend on the facts, including how it was actually used.
- The supplied statutory material does not include a currency notice. The current filing-date rules and any later amendments should be checked before relying on this page.
Evidence you would need
This kind of case is decided on the facts of the individual property. These are the records that usually settle it, and the ones an adviser would ask you for.
- Completion statements or other records showing the effective date of the new-home purchase
- Completion statements or other records showing the effective date of the old-home sale
- A copy of the LTT return and evidence of when it was submitted
- Evidence that the old property was your only or main home
- Evidence of your intention to use the new property as your only or main home
Explore this with an AI
Readers often want to test their own situation. Copy the prompt below into ChatGPT, Claude or Gemini. It hands the model the actual legislation for this page rather than letting it answer from memory, and tells it to be explicit about what is uncertain. What comes back is information, not advice – check it against the links above.
I am researching Land Transaction Tax (LTT), the tax on property in Wales. It replaced Stamp Duty Land Tax in Wales on 1 April 2018, and SDLT does not apply in Wales. MY QUESTION Sold your old home before filing your LTT return? [Replace this with your own situation: what you are buying, the price, the dates, who the buyer is, and what you plan to do with the property.] THE LAW THIS TURNS ON - LTTA 2017 section 24 - higher rates residential property transactions under schedule 5 https://www.legislation.gov.uk/anaw/2017/1/section/24 - LTTA 2017 Schedule 5 para 3 - when higher LTT rates can apply https://www.legislation.gov.uk/anaw/2017/1/schedule/5/paragraph/3 - LTTA 2017 Schedule 5 para 5 - owning another home at the end of completion day https://www.legislation.gov.uk/anaw/2017/1/schedule/5/paragraph/5 - LTTA 2017 Schedule 5 para 8 - selling an old main home after buying a new one https://www.legislation.gov.uk/anaw/2017/1/schedule/5/paragraph/8 - LTTA 2017 Schedule 5 para 23 - return treatment after selling the former main home https://www.legislation.gov.uk/anaw/2017/1/schedule/5/paragraph/23 Guidance page from the Welsh Revenue Authority on this topic (guidance, not law): https://www.gov.wales/higher-rates-purchases-residential-property-technical-guidance#5244 HOW I WANT YOU TO ANSWER 1. Work from the legislation above. Read it before answering. Guidance from the Welsh Revenue Authority is its view of the law, not the law, and does not bind a tribunal or a court. 2. Tell me what the rule actually requires, in plain English. 3. Tell me which facts decide the answer, and which facts would change it. 4. Tell me what evidence I would need to support the position. 5. Be explicit about anything unsettled or fact-sensitive. Do not guess. 6. Your training data has a cutoff and SDLT rates and reliefs change at fiscal events. Say so if you are not sure the law is current. POINTS ALREADY KNOWN TO BE UNCERTAIN ON THIS TOPIC - Whether a property was a person's only or main home can depend on the facts, including how it was actually used. - The supplied statutory material does not include a currency notice. The current filing-date rules and any later amendments should be checked before relying on this page. Do not give me a conclusion you cannot support from the provisions above.
Legislation links show the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017 as it stood on 2025-11-17. The law may have changed since, and the rules that apply are those in force on the date of your transaction. The official guidance this page is based on is here.
This page was last updated on 4 September 2026
Useful article? You may find it helpful to read the original guidance here: Sold your old home before filing your LTT return?
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