LTT late-payment penalties: when WRA can charge 5%
LTT late-payment penalties
WRA’s official guidance says unpaid LTT can attract a 5% penalty once the relevant penalty date is reached. Further 5% penalties may follow if it remains unpaid.
- Check the payment due date and penalty date.
- Use the unpaid amount, not the property price.
- Take special care with assessments, amendments and deferrals.
Scroll down for the full analysis.
Read the original guidance here:
LTT late-payment penalties: when WRA can charge 5%
If you do not pay Welsh land transaction tax on time, the Welsh Revenue Authority may charge a penalty. For LTT, the official guidance says the first penalty is 5% of the unpaid tax. More 5% penalties can follow if it stays unpaid.
What this rule is about
LTT is Wales’s tax on some property purchases. It is not the same tax as stamp duty land tax in England and Northern Ireland.
Usually, you must pay LTT by the filing date for your return. The penalty does not arise on that day under the official source. Instead, it arises if tax is still unpaid on the relevant penalty date.
That gap can sound reassuring. It is not a reason to delay. Penalties are based on the unpaid amount. Large unpaid sums can mean large charges.
What the official source says
WRA’s technical guidance says that a person who has not paid devolved tax by its penalty date is subject to a late-payment penalty. For land transaction tax, the stated rate is 5% of the unpaid tax.
- For an ordinary LTT return, the penalty date is 30 days after the return’s filing date.
- The same 30-day approach applies to an additional amount shown on an LTT return.
- For an assessment made after a return, the date depends on when the assessed amount had to be paid.
- For an amendment or correction to a return, it is 30 days after the payment due date for the extra amount.
- A deferred LTT amount has its own penalty date: 30 days after its payment due date.
- An amount WRA refuses to defer also has a penalty date 30 days after its payment due date.
The official source also says that a continuing failure to pay can lead to more penalties. Another 5% can arise within six months. The period is measured from 30 days before the penalty date. A further 5% can arise within 12 months, measured the same way.
In plain terms: paying the first penalty does not settle the underlying tax. If the tax remains unpaid, the cost can increase.
What this means in practice
Start with the amount of LTT still unpaid, not the original purchase price. Then identify why that amount is due. The route matters because it sets the relevant payment date and, in turn, the penalty date.
You might think every late LTT amount follows the same timetable. It does not. A normal return, a later assessment and a deferred amount can each have different dates.
- Keep the submitted return and evidence of when you filed it.
- Check whether WRA says the sum comes from a return, an assessment, an amendment or a correction.
- Read the payment date on any WRA notice carefully.
- Calculate 5% of the unpaid LTT amount for the initial penalty described by the source.
- Check whether tax remained unpaid at the later six-month and 12-month stages.
- Do not use landfill tax repeat-failure rates to work out an LTT penalty.
There is a separate rule for tax credits. If WRA assesses a tax credit that should not have been paid, set off, or has become too high, the guidance says WRA may impose a 5% penalty if the assessed amount is not paid on time.
How to analyse it
The useful question is not simply, “Was the payment late?” Ask: “What was due, when was it due, and what remained unpaid on the penalty date?” Work through the records in that order.
- Identify the tax involved: LTT or landfill disposals tax.
- Identify the document creating the amount due.
- Find the date by which that amount had to be paid.
- Work out the penalty date stated in the official guidance.
- Calculate the amount still unpaid on that date.
- For LTT, apply the stated 5% rate to that unpaid amount.
- Check whether the unpaid amount continued to the later penalty stages.
- Where payment was deferred, check WRA’s decision and the end date of the deferral period.
A deferral is not a cancellation of tax. Under the LTT legislation, a buyer may request deferral of tax linked to contingent or uncertain future payments. Agreement makes payment due the next day. It must be paid by the end of that day, after the deferral period ends. If WRA refuses all or part of a request, the refused amount has a separate payment rule.
Example
Imagine that £40,000 of LTT is still unpaid on the penalty date for an ordinary return. Under the official guidance, the initial late-payment penalty is 5% of £40,000: £2,000.
If £40,000 remains unpaid at a later continuing-failure stage, the guidance says a further 5% penalty can arise. That would be another £2,000 on the same unpaid amount. The actual calculation depends on what remained unpaid at each relevant date.
This example does not add interest, other penalties or a payment plan. The supplied source deals only with the late-payment penalties described above.
Why this can be difficult in practice
The percentage is simple. The dates are the part people get wrong. A penalty may relate to an extra amount found after the original return, rather than the amount first paid when the property purchase completed.
Deferral cases need special care. The law distinguishes a deferred amount from an amount WRA has refused to defer. Their payment dates can differ, so their penalty dates can differ too.
- Do not assume the filing date is itself the penalty date.
- Do not assume a later assessment uses the ordinary-return timetable.
- Do not treat a deferral request as approval by WRA.
- Check whether WRA agreed the whole requested deferral or only part of it.
- Keep proof of when payments reached WRA.
- Check current legislation before relying on historic technical guidance.
Key takeaways
- For LTT, the official source states an initial penalty of 5% of unpaid tax.
- The relevant penalty date depends on why the amount became due.
- Further 5% penalties can arise if the LTT remains unpaid.
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 57 — when land transaction tax must normally be paid
- LTTA 2017 section 58 — requests to defer tax on uncertain future payments
- LTTA 2017 section 61 — payment dates after a deferral decision
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 material does not include the current text of the Tax Collection and Management (Wales) Act 2016 provisions that create these penalties. The official guidance should therefore be checked against current legislation before relying on a penalty calculation.
- The requested currency notice was not available in the mounted skills. It has not been possible to verify whether legislative changes after the source material affect this page.
- The official source gives penalty dates but does not, in the supplied extract, explain every possible challenge, reduction, cancellation or appeal route.
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 LTT return and its filing date
- proof of the date and amount paid
- any WRA assessment, determination, correction or amendment notice
- any deferral request and WRA’s decision
- a calculation showing the unpaid amount on each relevant date
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 late-payment penalties: when WRA can charge 5% [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 57 - when land transaction tax must normally be paid https://www.legislation.gov.uk/anaw/2017/1/section/57 - LTTA 2017 section 58 - requests to defer tax on uncertain future payments https://www.legislation.gov.uk/anaw/2017/1/section/58 - LTTA 2017 section 61 - payment dates after a deferral decision https://www.legislation.gov.uk/anaw/2017/1/section/61 Guidance page from the Welsh Revenue Authority on this topic (guidance, not law): https://www.gov.wales/tax-collection-and-management-wales-act-2016-penalties-technical-guidance#6519 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 material does not include the current text of the Tax Collection and Management (Wales) Act 2016 provisions that create these penalties. The official guidance should therefore be checked against current legislation before relying on a penalty calculation. - The requested currency notice was not available in the mounted skills. It has not been possible to verify whether legislative changes after the source material affect this page. - The official source gives penalty dates but does not, in the supplied extract, explain every possible challenge, reduction, cancellation or appeal route. 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 late-payment penalties: when WRA can charge 5%
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