How multiple dwellings relief changes your LTT calculation
Multiple dwellings relief and LTT
The relief can reduce LTT on a purchase of more than one home, but some tax remains due.
- Use an average price per home
- Split mixed-property prices fairly
- Check the rules applying on completion
Scroll down for the full analysis.
Read the original guidance here:
How multiple dwellings relief changes your LTT calculation
Buying more than one home can reduce your Land Transaction Tax bill through multiple dwellings relief. It does not remove Land Transaction Tax completely. Some LTT will still be due.
What this rule is about
The relief changes the way LTT is calculated when a purchase includes two or more homes. Rather than applying the whole price at once, the calculation uses an average price for each home before the relevant results are brought together. That average is the starting point.
This can reduce the bill. It is not an exemption.
What the official source says
According to the Welsh Revenue Authority, this relief is partial. Claiming it does not mean that you pay no LTT. Its online calculator can help you estimate the amount.
- Start with the part of the price linked to the homes.
- Divide that amount by the number of homes.
- Work out the tax on that average amount.
- Multiply the result by the number of homes.
- Work out tax separately on any price linked to other property.
What this means in practice
Where the deal includes land or other property alongside the homes, you cannot divide the whole bill by the number of homes until the price has been split fairly. The calculation follows that split.
- Keep the agreed price and property details.
- Identify every home included in the deal.
- Record how you split the price between homes and other property.
- Check whether another linked purchase is involved.
How to analyse it
Consider the questions in this order. The facts matter as much as the arithmetic.
- Does the purchase include at least two homes?
- Is any part of the deal for other property?
- What is a fair split of the price?
- Are there linked purchases to include?
- Have you claimed the relief in the LTT return or an amendment?
Example
Rhiannon buys two homes together for £600,000, and £300,000 is fairly linked to each home. Tax is first worked out on £300,000, and that result is then multiplied by two. The final amount still depends on the tax rules in force on completion.
Why this can be difficult in practice
In practice, the division itself is often not the difficult part. Deciding what share of the price belongs to each home can be harder, particularly where land or another building comes with them.
- Calling land part of a home does not settle the issue.
- A linked purchase may alter the figures.
- The minimum tax rule can change over time.
Key takeaways
- The relief reduces LTT; it does not cancel it.
- Calculate using an average price per home.
- Use the Welsh Revenue Authority calculator as a guide.
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 29 — reliefs modify the normal tax calculation
- LTTA 2017 section 30 — multiple dwellings relief is partial and must be claimed
- LTTA 2017 Schedule 13 para 3 — purchases that can qualify for the relief
- LTTA 2017 Schedule 13 para 4 — splitting the price fairly between homes
- LTTA 2017 Schedule 13 para 5 — parts that make up the relieved tax
- LTTA 2017 Schedule 13 para 6 — calculating tax on the homes bought
- LTTA 2017 Schedule 13 para 7 — calculating tax on any other property included
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 statutory minimum tax percentage is date-sensitive. The supplied legislation records a change from 13 February 2026, so the applicable rule must be checked against the completion date.
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 total price paid and the number of homes bought.
- A fair basis for splitting the price between the homes and other property.
- Details of linked purchases.
- The completion date and the tax return.
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 multiple dwellings relief changes your LTT calculation [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 29 - reliefs modify the normal tax calculation https://www.legislation.gov.uk/anaw/2017/1/section/29 - LTTA 2017 section 30 - multiple dwellings relief is partial and must be claimed https://www.legislation.gov.uk/anaw/2017/1/section/30 - LTTA 2017 Schedule 13 para 3 - purchases that can qualify for the relief https://www.legislation.gov.uk/anaw/2017/1/schedule/13/paragraph/3 - LTTA 2017 Schedule 13 para 4 - splitting the price fairly between homes https://www.legislation.gov.uk/anaw/2017/1/schedule/13/paragraph/4 - LTTA 2017 Schedule 13 para 5 - parts that make up the relieved tax https://www.legislation.gov.uk/anaw/2017/1/schedule/13/paragraph/5 - LTTA 2017 Schedule 13 para 6 - calculating tax on the homes bought https://www.legislation.gov.uk/anaw/2017/1/schedule/13/paragraph/6 - LTTA 2017 Schedule 13 para 7 - calculating tax on any other property included https://www.legislation.gov.uk/anaw/2017/1/schedule/13/paragraph/7 Guidance page from the Welsh Revenue Authority on this topic (guidance, not law): https://www.gov.wales/land-transaction-tax-relief-multiple-dwellings-guide#72354 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 statutory minimum tax percentage is date-sensitive. The supplied legislation records a change from 13 February 2026, so the applicable rule must be checked against the completion date. 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 multiple dwellings relief changes your LTT calculation
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