When you must pay Land Transaction Tax in Wales
Paying LTT
The buyer calculates Land Transaction Tax in the return and pays any tax due by the filing date. A later amendment that increases the tax must be paid when it is sent to WRA.
- The buyer is responsible for payment
- Filing a return does not replace payment
- Joint buyers may each be responsible for the full amount
Scroll down for the full analysis.
Read the original guidance here:
When you must pay Land Transaction Tax in Wales
When you buy land or property in Wales, you usually work out and pay Land Transaction Tax yourself. LTT is Wales’ version of stamp duty. If tax is due, it must be paid by the deadline for your return.
What this rule is about
The law puts responsibility on the buyer, not the seller. You calculate the tax due in your return. In a self-assessment, you give WRA the calculation you have made from the facts of the purchase, rather than relying on WRA to produce it for you. You remain responsible.
The payment deadline matters because filing a return is not enough. If the return shows tax due, payment must arrive no later than its filing date.
What the official source says
Under the Land Transaction Tax Act, which WRA’s guidance reflects, the buyer must pay tax for a taxable land purchase, including where a change to the return means more tax is due. The timing is unchanged.
- You calculate the tax due when you make the return.
- You must pay the amount shown as due by the filing date.
- Where you amend the return before that date and the amendment shows extra tax, you must still pay that additional amount by the same date. No extension follows.
- When you amend it after that date and the amendment identifies extra tax, pay that extra amount at the time you give WRA the amendment. Pay it then.
What this means in practice
Do not treat the return and payment as two unrelated jobs. They share a deadline. Your conveyancer may arrange payment, but the legal responsibility remains with the buyer.
If you buy with someone else, the general rule is tougher than many people expect. Each joint buyer can be held responsible for the whole amount, not merely their share.
- Check the tax figure before the return is sent.
- Make sure payment arrangements are clear before the filing date.
- Keep proof of the return and payment.
- If you spot an error, work out whether it increases the tax due.
How to analyse it
Start with the date that applies to your purchase. For a return required under the supplied statute, the period is 30 days starting on the day after the effective date. That period can be changed by regulations, so it should be checked for a live transaction.
- Identify the effective date for the purchase.
- Confirm whether you must make an LTT return.
- Work out the filing date that applies at that time.
- Calculate the tax shown in the return.
- Pay that amount no later than the filing date.
- If you amend later, pay any increase when you send the amendment.
Example
Alex sends an LTT return showing £4,000 of tax due. The filing date that applies to Alex’s purchase is 20 May. Alex must pay £4,000 by 20 May. On 1 June, Alex corrects the return and finds a further £600 is due. That £600 must be paid when Alex gives WRA the amended return.
Why this can be difficult in practice
The part people miss is the later correction. An amended return can change the amount due, and a late amendment does not create a new period to pay the extra amount.
For some deals involving uncertain future payments, a separate legal route may permit a request to defer part of the tax, but only if the statutory conditions are met. It is not an automatic delay.
- Paying after filing can create problems even where the calculation was right.
- A correction may mean extra tax is due immediately.
- Joint buyers should not assume each owes only half.
- The return deadline may depend on rules in force at the time.
Key takeaways
- The buyer must pay LTT due on the purchase.
- Tax shown on the return is due by the filing date.
- Extra tax from a late amendment is due when the amendment is sent.
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 37 — responsibility where land is bought by joint buyers
- LTTA 2017 section 44 — duty to file a return and self-assess tax
- LTTA 2017 section 52 — power to change the return filing period
- LTTA 2017 section 56 — buyer responsible for tax on a taxable transaction
- LTTA 2017 section 57 — when tax and extra tax must be paid
- LTTA 2017 section 58 — requests to defer tax on uncertain future payments
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 skill bundle did not contain the requested currency notice. The current filing period and the current version of the legislation should be checked before relying on a deadline.
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 completion and effective date of the purchase
- The return submitted to the Welsh Revenue Authority
- The tax calculation and proof of payment
- Any amended return and the date it was sent
- Where there are joint buyers, the names of all buyers
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 you must pay Land Transaction Tax in Wales [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 37 - responsibility where land is bought by joint buyers https://www.legislation.gov.uk/anaw/2017/1/section/37 - LTTA 2017 section 44 - duty to file a return and self-assess tax https://www.legislation.gov.uk/anaw/2017/1/section/44 - LTTA 2017 section 52 - power to change the return filing period https://www.legislation.gov.uk/anaw/2017/1/section/52 - LTTA 2017 section 56 - buyer responsible for tax on a taxable transaction https://www.legislation.gov.uk/anaw/2017/1/section/56 - LTTA 2017 section 57 - when tax and extra tax must 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 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#5575 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 skill bundle did not contain the requested currency notice. The current filing period and the current version of the legislation should be checked before relying on a deadline. 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: When you must pay Land Transaction Tax in Wales
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