How to work out an LTT multiple dwellings relief refund
How the refund works
For multiple dwellings relief, compare the LTT you paid with the LTT due after the relief. The difference is the refund amount.
- Calculate LTT with the relief.
- Check the LTT originally paid.
- Subtract the revised figure.
Scroll down for the full analysis.
Read the original guidance here:
How to work out an LTT multiple dwellings relief refund
Your Land Transaction Tax refund is the gap between what you paid and what you would pay after multiple dwellings relief. Work out both figures first. Then subtract the lower figure from the higher one.
What this rule is about
Multiple dwellings relief can change the way LTT is worked out when a purchase includes more than one home. This page deals only with the refund amount. It assumes you have already considered whether the relief applies.
Stamp duty is a common name for property tax. In Wales, the tax is Land Transaction Tax, or LTT.
What the official source says
The Welsh Revenue Authority says to compare your LTT bill with and without multiple dwellings relief. The difference is the amount you claim back.
- Work out the LTT due after you include multiple dwellings relief.
- Find the amount of LTT that you actually paid.
- Subtract the LTT due from the LTT paid.
What this means in practice
Do not treat the full amount on your original return as the refund, because only an overpayment created when the relief reduces tax can be reclaimed. The refund only covers the overpayment. No tax reduction means no claim.
Use identical purchase facts in each calculation, since the result can be compared only when the relief is the sole element that changes between them. Nothing else should change.
- Keep the original LTT calculation.
- Prepare a separate calculation that includes the relief.
- Check that both calculations cover the same purchase.
- Record the subtraction clearly.
How to analyse it
Start with the figures, not a guess. What did you pay? What does the LTT calculation show after multiple dwellings relief? The answer comes from the difference between them.
- Confirm the LTT amount shown as paid on the original return before calculating the revised figure, so the subtraction begins from the amount actually paid.
- Calculate LTT again with multiple dwellings relief included.
- Use the rules that applied on the transaction date.
- Check whether linked purchases affect the calculation.
- Subtract the revised LTT figure from the original amount paid.
Example
Here is a simple illustration. Priya paid £18,000 of LTT on her original return. Her calculation with multiple dwellings relief shows £14,500. Her refund amount is £3,500: £18,000 minus £14,500. These figures show the method only. They do not show an LTT rate.
Why this can be difficult in practice
The subtraction is simple. The hard part is getting the revised LTT figure right. Different conclusions about the homes included, their values, or any linked purchases may alter that figure, even where the original amount paid remains unchanged. Check it carefully.
You might think a calculator alone settles the answer. It does not. It can only calculate from the facts and figures entered.
- People sometimes compare calculations that use different purchase details.
- A purchase may include land or property as well as homes.
- Linked purchases can affect the calculation.
- Changes to the relief rules can matter for the transaction date.
Key takeaways
- Your refund is the difference between LTT paid and LTT due with the relief, rather than the full amount shown on your original return.
- Calculate both figures using the same purchase facts.
- Check the rules in force on the transaction date.
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 13 para 5 — how multiple dwellings relief changes the LTT amount
- LTTA 2017 Schedule 13 para 6 — calculating tax linked to homes in the purchase
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 source does not explain whether multiple dwellings relief applies to a particular purchase. That depends on the facts and the legislation.
- The statutory calculation for multiple dwellings relief has changed for transactions affected by amendments from 13 February 2026. Check which rules apply to the transaction before calculating a refund.
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 original LTT return and the amount of LTT paid
- A calculation of LTT using multiple dwellings relief
- Details of the homes and other property included in the purchase
- The transaction date and any linked purchases
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 How to work out an LTT multiple dwellings relief refund [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 13 para 5 - how multiple dwellings relief changes the LTT amount https://www.legislation.gov.uk/anaw/2017/1/schedule/13/paragraph/5 - LTTA 2017 Schedule 13 para 6 - calculating tax linked to homes in the purchase https://www.legislation.gov.uk/anaw/2017/1/schedule/13/paragraph/6 Guidance page from the Welsh Revenue Authority on this topic (guidance, not law): https://www.gov.wales/amend-land-transaction-tax-return-claim-multiple-dwellings-relief-refund 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 source does not explain whether multiple dwellings relief applies to a particular purchase. That depends on the facts and the legislation. - The statutory calculation for multiple dwellings relief has changed for transactions affected by amendments from 13 February 2026. Check which rules apply to the transaction before calculating a refund. 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: How to work out an LTT multiple dwellings relief refund
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