Land Transaction Tax when you pay the price later
In short
If you agree to pay part of a Welsh property price later, Land Transaction Tax uses the full agreed amount. A later due date does not create a discount.
- Use the total agreed price.
- Include instalments due later.
- Check the contract and payment schedule.
Scroll down for the full analysis.
Read the original guidance here:
Land Transaction Tax when you pay the price later
Paying part of a property price later does not reduce the amount used for Land Transaction Tax, Wales’s version of stamp duty. The tax uses the full price you agreed to pay. There is no reduction just because some money arrives later.
What this rule is about
A sale may involve one payment on completion, several instalments, or a sum due at a later date. That can make the deal feel cheaper at first. For this tax, however, the timing does not alter the agreed total.
What the official source says
The official guidance explains that the full agreed amount is used. The law says that no discount is made because the seller must wait to receive all or part of it.
- Include the whole agreed price.
- Include sums due after completion.
- Include instalments that form part of that price.
- Do not reduce a later sum for the wait.
What this means in practice
Spreading payments may help with cash flow. It does not, by itself, lower the figure used to work out Land Transaction Tax. This is the point people often miss: a delayed payment is still part of the price.
- Read the total price in the contract.
- List every scheduled payment.
- Keep the payment timetable with the sale papers.
How to analyse it
Start with what you have promised to pay for the property, rather than what you hand over on completion day. Then separate the timing of payment from the total amount agreed.
- What is the total agreed price?
- Which sums are payable later?
- Are those sums instalments of that price?
- Has anyone reduced the figure only because payment is delayed?
Example
Rosa agrees to buy a property for £300,000. She pays £200,000 on completion and £100,000 a year later. The amount used is £300,000, not a lower figure based on waiting a year for the final £100,000.
Why this can be difficult in practice
The paperwork may use several labels for later payments. A payment is not outside the calculation simply because it is called an instalment. What matters is whether it forms part of the agreed price for the property.
- Payment labels can be misleading.
- Side agreements may change the picture.
- The agreed total should be clear from the documents.
Key takeaways
- The full agreed price is used.
- Later instalments are not discounted.
- Payment timing is not a price reduction.
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 Schedule 4 para 1 — what forms part of the amount paid
- LTTA 2017 Schedule 4 para 3 — no discount for a deferred payment
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.
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 contract and any side agreement showing the total agreed price.
- The instalment schedule and the dates each sum becomes payable.
- Evidence of whether any later amount is part of the price or a separate payment.
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 Land Transaction Tax when you pay the price later [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 Schedule 4 para 1 - what forms part of the amount paid https://www.legislation.gov.uk/anaw/2017/1/schedule/4/paragraph/1 - LTTA 2017 Schedule 4 para 3 - no discount for a deferred payment https://www.legislation.gov.uk/anaw/2017/1/schedule/4/paragraph/3 Guidance page from the Welsh Revenue Authority on this topic (guidance, not law): https://www.gov.wales/chargeable-consideration-technical-guidance#5123 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. 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: Land Transaction Tax when you pay the price later
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