Land Transaction Tax: WRA can demand extra tax within 30 days during an enquiry
WRA amendments during an enquiry
WRA can change a Welsh tax return during an enquiry where it thinks too little tax is shown and delay could risk tax being lost.
- Both conditions must be met
- Payment is due within 30 days of the notice date
- A later limited enquiry has a narrower scope
Scroll down for the full analysis.
Read the original guidance here:
Land Transaction Tax: WRA can demand extra tax within 30 days during an enquiry
Land Transaction Tax: WRA can demand extra tax within 30 days during an enquiry
If the Welsh Revenue Authority, or WRA, is checking your tax return, it can sometimes change the return before its enquiry ends. This can bring extra Land Transaction Tax (LTT) into charge quickly. If you receive this kind of notice, the payment deadline is 30 days.
What this rule is about
An enquiry is WRA’s check into whether a tax return is right. Usually, that check takes time. Yet WRA may act during the check where it thinks the return shows too little tax and waiting could put Welsh tax at risk.
This is an early-payment power. It is not available simply because WRA has opened an enquiry.
The distinction matters. A notice can require payment while questions about the return are still being looked at.
What the official source says
The official WRA page explains that WRA may send you a notice changing your tax return during an enquiry. It must first form two opinions. Both are needed.
- WRA thinks the tax shown on your self-assessed return is too low.
- WRA thinks tax could be lost unless the shortfall is paid immediately.
- The notice changes the return to include the extra tax.
- You must pay the extra tax within 30 days from the day WRA issues its notice.
- You must also pay interest within that period where interest applies.
There is a tighter rule in one unusual situation. It applies where WRA has already finished an enquiry into the original return, you later amend that return, and the new enquiry is limited to matters caused by your amendment.
In that case, this particular power is available only for a tax shortfall resulting from your amendment. An unrelated point cannot be used to amend the return under this rule through the limited enquiry.
What this means in practice
A WRA amendment notice is more than a request for information. It can create an amount you must pay before the enquiry is complete. Read the notice carefully, especially its issue date and the calculation it gives.
Do not assume that an open enquiry means payment can wait until the end. Under this rule, it may not.
- Keep the notice, including the date shown as the issue date.
- Check which return WRA has changed.
- Compare WRA’s calculation with the figures in your return.
- Identify the documents that support your original figures.
- Check whether WRA has added interest as well as tax.
- Work out the 30-day payment period from the notice date.
The official source does not say that every enquiry will result in an amendment. WRA must form the two opinions described above before it can use this power.
How to analyse it
Start with the timeline. Whether WRA is checking the original return or only a later change that you made often determines the answer.
- Is an enquiry into your tax return still in progress?
- Has WRA actually issued a notice amending the return?
- Does the notice say that the tax on the return was too low?
- Does it explain why WRA thinks delay could risk loss of tax?
- Was there an earlier enquiry that WRA had already completed?
- Did you amend the return after that earlier enquiry ended?
- If so, is the extra tax said to result from your amendment?
- What tax and interest does the notice say you must pay?
This sequence is important. A limited later enquiry does not have the same reach as an enquiry into the original return.
Example
Imagine that Aled’s LTT return shows £1,200 of tax. During an enquiry, WRA thinks the correct amount is £2,000 and believes the £800 difference could be lost if payment waits. WRA may issue a notice changing the return to include the extra £800. Within 30 days beginning with the notice date, Aled must pay that additional amount and any interest that applies.
Now change one fact. WRA had already completed an earlier enquiry into Aled’s original return. Aled then amended it, and WRA opened a new enquiry limited to that amendment. During that limited enquiry, this rule permits amendments only where Aled’s own amendment caused the tax difference.
Why this can be difficult in practice
The hard part is often not the arithmetic. It is knowing which enquiry WRA is carrying out and why it says immediate payment is needed.
Paperwork can make this less clear than it should be. Where a return has changed more than once, notices may refer to different stages of the same matter.
- An enquiry notice is not itself an amendment notice.
- A notice changing a return may require payment before the enquiry has finished.
- The 30-day period starts on the day WRA issued the amendment notice.
- A later, limited enquiry has a special restriction where it follows your amendment.
- The source does not give a general definition of when tax is at risk of being lost.
If you only remember one thing, make it this: check whether the extra tax WRA claims is linked to the return amendment it is allowed to examine.
Key takeaways
- WRA may amend a return during an enquiry only where both statutory conditions are met.
- Extra tax, and applicable interest, must be paid within 30 days of the notice date.
- A limited enquiry after your own amendment restricts what WRA can amend under this rule.
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 44 — scope of an enquiry into a tax return
- TCMA 2016 section 45 — wra amendments during enquiries to prevent tax loss
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 official source does not explain what facts will lead WRA to think that tax could be lost unless it acts immediately.
- The source does not set out the separate routes for challenging, postponing or recovering an amount demanded in a notice.
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 tax return under enquiry
- the WRA enquiry notice and amendment notice
- any earlier closure notice
- any taxpayer amendment and supporting records
- a calculation of the extra tax and interest shown
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 When WRA can change your tax return during an enquiry [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 44 - scope of an enquiry into a tax return https://www.legislation.gov.uk/anaw/2016/6/section/44 - TCMA 2016 section 45 - wra amendments during enquiries to prevent tax loss https://www.legislation.gov.uk/anaw/2016/6/section/45 Guidance page from the Welsh Revenue Authority on this topic (guidance, not law): https://www.gov.wales/tax-collection-and-management-wales-act-2016-tax-returns-enquiries-and-assessments-technical#5932 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 official source does not explain what facts will lead WRA to think that tax could be lost unless it acts immediately. - The source does not set out the separate routes for challenging, postponing or recovering an amount demanded in a notice. 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: Land Transaction Tax: WRA can demand extra tax within 30 days during an enquiry
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