LTT return declarations: what you and your agent must confirm
LTT return declarations
You must confirm that an LTT return is correct and complete to the best of your knowledge. An agent may make the declaration in the permitted form, but this does not remove your responsibility.
- Check the return before it is declared.
- Confirm the relevant date where you can.
- Use the legislation where official guidance and the Act differ.
Scroll down for the full analysis.
Read the original guidance here:
LTT return declarations: what you and your agent must confirm
LTT return declarations: what you and your agent must confirm
An LTT return contains a formal promise that, as far as you know, its information is correct and complete. LTT is Wales’s property tax. It is not Stamp Duty Land Tax, or SDLT. An agent may help with the return, but you still remain responsible for it.
What this rule is about
Buying land or property in Wales may mean sending a Land Transaction Tax return to the Welsh Revenue Authority. The declaration is the part of the return where someone confirms that all stated facts and figures are correct and complete to the best of their knowledge. It is a formal confirmation.
This may sound routine. It matters because the return can determine the tax due and may be checked later. Read and confirm the details before anyone makes the declaration.
What the official source says
Section 53 of the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017 requires the buyer to make a declaration. Welsh Revenue Authority guidance sets out three ways this may appear on a return.
- You make the declaration yourself when you complete the return.
- Your agent makes it for you after you have confirmed all the details in the return, including the relevant date, and checked that the entered information is correct and complete. Your confirmation comes first.
- Your agent makes it after you confirm every detail except the relevant date, which the agent then confirms to the best of their own knowledge.
- For a paper return, the guidance says each buyer must sign the declaration.
Usually, the relevant date is the transaction’s effective date. Normally, that is the completion date. Different relevant dates apply to some later or replacement returns.
- For a return after a contingent amount becomes payable, or will not become payable, it is the date of that event.
- For an uncertain amount that later becomes known, it is the date when the amount becomes known.
- Use the relief-withdrawal event date.
- Use the later purchase’s effective date.
What this means in practice
Using an agent does not let you leave the return unread. The agent can prepare it, submit it and make the declaration in the permitted form. However, the Act says the buyer’s responsibility does not change.
The central point is straightforward: tell your agent clearly what you know, then check every entry they have made before the declaration is made. Do this before the declaration is made.
- Check the names of all buyers and the property details.
- Check the price and any other amount being given for the property.
- Confirm the completion date, if you know it.
- Tell the agent about linked purchases, relief claimed, or later changes.
- Keep the emails or notes showing what you confirmed.
How to analyse it
Begin with the return being made. A normal purchase return may use a different date from a later return. Then identify who has the knowledge needed for each part of the declaration.
- Is this the first return for the purchase, or a later return?
- What event has made a later return necessary?
- What is the relevant date for that type of return?
- Can you confirm that date from the documents available?
- Have you, after checking the documents available and the relevant date, confirmed that every other answer in the return is correct and complete, as far as you know? Check this carefully.
- If an agent is acting, which of the three declaration forms applies?
You may think that the agent takes over the risk. They do not.
The agent may confirm the relevant date. Your confirmation still covers the remaining information.
Example
Ffion buys a house in Wales and asks an agent to complete her LTT return. She checks the names, address, price and other answers.
She also gives the agent the completion statement. She can therefore confirm the completion date.
The agent may declare for Ffion. Ffion has confirmed the whole return.
Now change one fact. Ffion has confirmed every answer except the relevant date because the documents available to her do not allow her to confirm it with certainty. Everything else is confirmed.
The guidance describes a different declaration. The agent then confirms the relevant date to the best of the agent’s own knowledge, while Ffion’s confirmation continues to cover all the remaining information in the return. The roles are separate.
Why this can be difficult in practice
The difficult part is often not the signature. It is deciding which date belongs in a later return. A date can affect whether a return is needed and the information that must be declared.
The official guidance needs careful reading here. Guidance conflicts with current section 53 wording. The Act refers to the end of the relevant interim period.
- Do not assume completion is always the relevant date.
- Do not sign or confirm a return before checking the final answers.
- Do not assume an agent’s involvement removes the buyer’s responsibility.
- Do not rely on the guidance alone where its wording differs from the Act.
Key takeaways
- Buyers declare LTT returns correct and complete. This is to their knowledge.
- An authorised agent can make the declaration, but the buyer must confirm the information they know.
- The relevant date is usually completion, but special later returns can use a different date.
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 53 — declarations required in land transaction tax returns
- LTTA 2017 section 47 — further returns after uncertain amounts become known
- LTTA 2017 section 49 — further returns when a tax relief is withdrawn
- LTTA 2017 section 51 — returns caused by later linked property purchases
- LTTA 2017 Schedule 5 para 24 — further returns after an interim higher-rates period
- LTTA 2017 section 71 — effective date normally means the completion date
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.
- Welsh Revenue Authority technical guidance: LTTA/6120 Declaration
Where this is not settled
- The supplied official guidance says that the relevant date for an interim higher-rates return is the effective date of the transaction that triggers the return. LTTA 2017 s.53(3)(d) instead refers to the end of the applicable interim period. The current return wording and guidance should be checked before filing.
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.
- The completed LTT return and declaration record
- Written authority for any agent completing the return
- The buyer’s confirmation of the return information
- Documents showing the relevant date, such as completion records or event evidence
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 LTT return declarations: what you and your agent must confirm [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 53 - declarations required in land transaction tax returns https://www.legislation.gov.uk/anaw/2017/1/section/53 - LTTA 2017 section 47 - further returns after uncertain amounts become known https://www.legislation.gov.uk/anaw/2017/1/section/47 - LTTA 2017 section 49 - further returns when a tax relief is withdrawn https://www.legislation.gov.uk/anaw/2017/1/section/49 - LTTA 2017 section 51 - returns caused by later linked property purchases https://www.legislation.gov.uk/anaw/2017/1/section/51 - LTTA 2017 Schedule 5 para 24 - further returns after an interim higher-rates period https://www.legislation.gov.uk/anaw/2017/1/schedule/5/paragraph/24 - LTTA 2017 section 71 - effective date normally means the completion date https://www.legislation.gov.uk/anaw/2017/1/section/71 Guidance page from the Welsh Revenue Authority on this topic (guidance, not law): https://www.gov.wales/land-transaction-tax-returns-and-payments-technical-guidance#5569 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 - The supplied official guidance says that the relevant date for an interim higher-rates return is the effective date of the transaction that triggers the return. LTTA 2017 s.53(3)(d) instead refers to the end of the applicable interim period. The current return wording and guidance should be checked before filing. 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 3 September 2026
Useful article? You may find it helpful to read the original guidance here: LTT return declarations: what you and your agent must confirm
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