LTT determination if you miss a tax return

Missing an LTT return

WRA may estimate the LTT due if you do not file a return by its deadline. This is a determination.

• WRA may make an estimate.
• The time limit is four years after the relevant filing date.
• Check the filing deadline and your records.

Scroll down for the full analysis.

LTT determination if you miss a tax return

If you miss an LTT return deadline, the Welsh Revenue Authority (WRA) may calculate an estimated tax bill. This Welsh stamp tax is called Land Transaction Tax, or LTT. WRA refers to its estimate as a determination.

What this rule is about

For a property deal, an LTT return gives WRA the information about LTT and the amount due.

Even without a return, WRA may decide the tax it considers payable. Missing the form does not prevent WRA from dealing with the issue.

What the official source says

WRA says that, if you fail to file a return by its deadline and fewer than four years have passed since the relevant filing date, it may make a determination. After that, it may not do so.

• The return was not filed by its deadline.
• WRA may estimate the LTT due.
• That estimate is called a determination.
• The four-year limit runs from the relevant filing date.

What this means in practice

You may not have sent in a return, but WRA can still issue a tax figure. WRA may use the property deal, available information and its view of the LTT due.

The estimate may differ from the amount you consider correct. This is why the return deadline matters.

• Keep proof that a return was sent and received.
• Keep the papers used to work out the LTT.
• Check the filing date before assuming WRA is out of time.

How to analyse it

First, ask whether the property deal required a return. If it did, ask whether you filed it on time.

Then check the date carefully. Count the four years from the filing date, rather than from a later letter, unless that later letter was also the filing date.

• Identify the relevant LTT return.
• Find its filing deadline.
• Check whether WRA made its determination within four years.

Example

Sam does not file an LTT return by the deadline. WRA may estimate the tax and issue a determination.

Once four years have passed since the relevant filing date, the source says that WRA can no longer make a determination, even if it has already considered the tax position. It cannot make one.

Why this can be difficult in practice

The key date can be easy to mistake, especially when later correspondence takes attention away from the filing deadline. A letter’s arrival date can distract from the return filing deadline.

• A missing copy of a return does not prove it was never filed.
• The source does not explain how WRA calculates its estimate.

Key takeaways

• WRA may estimate LTT if a return is late.
• Its estimate is called a determination.
• WRA has a four-year time limit.

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

• TCMA 2016 section 52 — determining tax where no return is made

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

• The supplied source does not explain how WRA works out its estimate or what happens after a determination is issued.

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 deadline that applied to the missing LTT return.
• Proof of whether and when the return was filed.
• Documents showing the property deal and the tax calculation.

Explore this with an AI

An AI will give you plenty of information. It will not take responsibility for any of it. When a conveyancing solicitor asks for professional tax advice, responsibility is what they are really asking for: a named adviser who has looked at your facts and carries indemnity insurance for the view they reach.

Email me your circumstances and I will give you my honest opinion, free. About half the time that is the end of it. If your solicitor wants it in writing, a formal letter of advice starts at £350, no VAT.

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Email me about your situationnick@landtaxadvice.co.uk

Nick Garner

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 determination if you miss a tax 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
- TCMA 2016 section 52 - determining tax where no return is made
  https://www.legislation.gov.uk/anaw/2016/6/section/52

Guidance page from the Welsh Revenue Authority on this topic (guidance, not law):
https://www.gov.wales/wra-tax-assessments-enquiries-guide

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 source does not explain how WRA works out its estimate or what happens after a determination is issued.

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 determination if you miss a tax return

View all WRA LTT Guidance Pages Here