How Land Transaction Tax bands work on an unlinked purchase
LTT is calculated in slices
For an unlinked Welsh property purchase, split the amount paid across the relevant LTT bands. Apply each rate to that slice only, then add the results.
- Check the rates for the effective date.
- Check whether the purchase is linked to another deal.
- Check higher rates, reliefs and lease rules first.
Scroll down for the full analysis.
Read the original guidance here:
How Land Transaction Tax bands work on an unlinked purchase
Land Transaction Tax, or LTT, is the tax you may know as stamp duty when you buy property in Wales. For a straightforward purchase that is not linked to another deal, you do not apply one rate to the full price. You split the price across tax bands, work out each part, and add them up.
What this rule is about
Where a single property purchase stands alone, rather than forming part of a linked arrangement, the normal method is to work out LTT band by band on the amount paid. It is the usual approach.
That sounds simple, but it matters. A higher rate applies only after the price passes the relevant band limit, and then only to the slice that falls above that limit. Earlier slices keep their own rates.
For example, when a price enters a 6% band, that does not mean 6% is charged on the whole purchase price or on every earlier slice. Only the amount in that band is.
What the official source says
Following section 27 of the Act, the Welsh Revenue Authority’s guidance sets out the band-by-band approach for calculating the LTT due on a purchase. The method is straightforward.
For every tax band that applies, after splitting the price between the relevant bands, multiply the part within that band by the percentage assigned to it. Then add the results together. The total is the LTT due.
- Start with the amount paid for the property.
- Identify the tax bands that apply to that type of purchase.
- Split the amount paid between those bands.
- Apply each band’s rate only to its own slice.
- Add the separate results together.
- Use higher residential rates where the purchase falls within that category.
- Use the non-residential bands for a non-residential purchase.
The Act requires regulations to set the bands and rates. They can differ between ordinary residential purchases, higher-rate residential purchases, and non-residential purchases.
The official guidance gives examples using particular bands and rates. Those figures help show the method. They are not a substitute for checking the rates that apply on your transaction’s effective date.
What this means in practice
Most people get one point wrong: they treat the highest rate reached as the rate for the whole price. That is not how this calculation works.
Take the source’s ordinary residential example of a £350,000 purchase. The first £225,000 is taxed at 0%. Only the next £125,000 is taxed at 6%, giving £7,500 in total.
- A 0% band still forms part of the calculation.
- Crossing into a new band does not change the rate on earlier slices.
- Your result depends on the type of property purchase.
- A second-home or buy-to-let purchase may use higher residential rates.
- A shop, office, farm or other non-residential purchase may use different bands.
- The WRA calculator can give a result from the details entered.
- The calculator cannot deal with every rule that needs a different method.
If the calculator gives a result that surprises you, first check the facts entered. A wrong property type, price or answer about another property can change the result.
How to analyse it
Work through the facts before reaching for the calculator. The rate table is only the final part of the job.
- Check that the land is in Wales and LTT applies.
- Find the effective date and the rates in force then.
- Work out the full amount paid for the property.
- Decide whether the purchase is residential, non-residential or mixed.
- Check whether the higher residential rates apply.
- Ask whether another purchase is linked to this one.
- Check whether a relief changes the normal result.
- For a lease, separate any premium from rent.
- Apply the band-by-band calculation if section 27 is the right method.
Why ask about linked purchases first? Where purchases form one scheme, arrangement or series between the same buyer and seller, or connected people, they can be linked. The normal unlinked calculation may then not be the right one.
Reliefs can matter too. The Act says that some relief rules take priority over the normal calculation. Do not assume that adding the bands is the whole answer before checking them.
Example
Here is a worked illustration using the higher residential figures in the official source. Ben owns his home and buy-to-let properties. He buys another residential property for £330,000 for that portfolio.
Using the source’s bands, the first £180,000 is taxed at 5%, which is £9,000. The next £70,000 is taxed at 8.5%, which is £5,950. The final £80,000 is taxed at 10%, which is £8,000.
Add those amounts: £9,000 + £5,950 + £8,000 = £22,950. The 10% rate applies only to the final £80,000. It does not apply to all £330,000.
Why this can be difficult in practice
The arithmetic is usually the easy part. Choosing the right method is harder. A calculator can only calculate from the answers you give it.
Linked deals, reliefs and leases can take a transaction outside this simple calculation. So can getting the property category wrong. A mixed property, for example, is not automatically dealt with as an ordinary home purchase.
- Do not use the highest rate on the whole price.
- Do not assume two purchases are separate because they have separate contracts.
- Do not assume the calculator can decide a difficult legal question.
- Do not rely on an old rate table without checking its date.
- Do not treat a reporting exception as a general rule for every low-value purchase.
- Check lease rent separately from any upfront premium.
- Check the figures in the official source’s non-residential Example 7 before relying on it.
The source’s Example 7 contains an internal error. It describes a £300,000 price, but the calculation refers to £330,000 and gives a total that does not match the listed slices. Although that error leaves the band-by-band rule unchanged, it is a strong reason to check every calculation yourself, especially where the figures in the source do not match. Check the calculation yourself.
Key takeaways
- LTT is normally calculated one band at a time, then added together.
- The highest rate reached applies only to the slice within that band.
- Check linked deals, reliefs, leases and the transaction date before relying on a simple calculation.
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 24 — tax bands and rates for different property purchases
- LTTA 2017 section 27 — calculating tax on a purchase not linked to others
- LTTA 2017 section 8 — when separate land purchases count as linked
- LTTA 2017 section 29 — reliefs that can alter the normal calculation
- LTTA 2017 section 45 — which land purchases must be reported to WRA
- LTTA 2017 section 46 — exceptions from reporting certain major land purchases
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 official source’s non-residential Example 7 says the property costs £300,000, but its calculation uses £330,000. Its stated total of £3,500 also does not follow from the listed bands and amounts. It should not be used as a calculation example without checking the figures.
- The source does not give an effective date for the quoted rates. Rates and bands must be checked against those applying on the effective date of the transaction.
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 full amount paid and anything else given for the property
- the effective date of the purchase
- whether the property is residential, non-residential or mixed
- whether higher residential rates apply
- details of any related purchase from the same seller or connected people
- lease terms and rent, where the purchase involves a lease
- details needed for any relief claimed
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 Land Transaction Tax bands work on an unlinked purchase [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 24 - tax bands and rates for different property purchases https://www.legislation.gov.uk/anaw/2017/1/section/24 - LTTA 2017 section 27 - calculating tax on a purchase not linked to others https://www.legislation.gov.uk/anaw/2017/1/section/27 - LTTA 2017 section 8 - when separate land purchases count as linked https://www.legislation.gov.uk/anaw/2017/1/section/8 - LTTA 2017 section 29 - reliefs that can alter the normal calculation https://www.legislation.gov.uk/anaw/2017/1/section/29 - LTTA 2017 section 45 - which land purchases must be reported to WRA https://www.legislation.gov.uk/anaw/2017/1/section/45 - LTTA 2017 section 46 - exceptions from reporting certain major land purchases https://www.legislation.gov.uk/anaw/2017/1/section/46 Guidance page from the Welsh Revenue Authority on this topic (guidance, not law): https://www.gov.wales/calculation-land-transaction-tax-payable-technical-guidance#6922 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 official source's non-residential Example 7 says the property costs £300,000, but its calculation uses £330,000. Its stated total of £3,500 also does not follow from the listed bands and amounts. It should not be used as a calculation example without checking the figures. - The source does not give an effective date for the quoted rates. Rates and bands must be checked against those applying on the effective date of the transaction. 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 4 September 2026
Useful article? You may find it helpful to read the original guidance here: How Land Transaction Tax bands work on an unlinked purchase
Search Land Tax Advice with Google
