LTT returns where you take possession before completion
Early possession can create two LTT events
Where a contract is substantially performed before completion, LTT may need to be dealt with at that earlier point and again when the transfer completes.
- Taking possession can include receiving rent.
- Each return should show the full known amount payable.
- Extra tax on completion belongs in the later return.
Scroll down for the full analysis.
Read the original guidance here:
LTT returns where you take possession before completion
If you take possession of a Welsh property, or pay most of the price, before the sale completes, Land Transaction Tax can have two return points.
That can mean two LTT returns, rather than one. It is a stamp duty issue that can be easy to miss.
What this rule is about
Most property sales complete on one day. Usually, that is the important date for LTT. But sometimes the buyer moves in early, starts collecting rent, or pays almost all the price before the transfer is signed.
The law calls this substantial performance. It treats the contract as a land transaction at that point. If the sale later completes, the final transfer is dealt with separately.
What the official source says
The Welsh Revenue Authority guidance says that substantial performance and later completion can each be notifiable, and that each return must show the full amount payable known when it is completed.
Check the wording carefully.
- Substantial performance can occur when you take all, or nearly all, of the property.
- It can also occur when you pay all, or nearly all, of the amount due.
- Receiving rent, or gaining the right to receive it, can count as taking possession.
- If the tax due on completion is higher, the extra tax goes in the completion return.
What this means in practice
Completion is not the only LTT event. Once substantial performance happens, the contract has its own effective date. A return for a notifiable transaction is normally due within 30 days after that date.
Where section 10(5) applies, both the contract and final transfer are notifiable, although the official guidance refers to exceptions that may matter in a live case.
Check the wording carefully.
- Record the date you moved in or gained control of the property.
- Keep proof of every payment made before completion.
- Use the full known price in each return, not just instalments paid so far.
- Rework the LTT position when the transfer completes.
How to analyse it
Ask what happened before legal completion. The label the parties use does not settle the point. What matters is possession, payment, and the terms of the contract.
- Was there a contract that was due to complete by transfer?
- Did you take possession before that transfer?
- Did you pay substantially all of the amount due before then?
- What was the full amount payable that was known for each return?
- Would the tax on final completion be higher than the tax already assessed?
- Does the arrangement involve a public body, partnership interest, or alternative finance?
Example
Amir agrees to buy a shop for £240,000. He takes possession and begins receiving its rent before the transfer completes. That may be substantial performance.
If the sale later completes, the contract and transfer can create separate LTT return points. Each return should show the full known £240,000 price.
Higher final tax goes in later return.
Why this can be difficult in practice
Early access is common in some deals. It may feel informal, especially where keys are handed over before completion.
Where early access gives a buyer the right to receive rent or practical control of the property before completion, those rights may matter more than the parties expect.
Control can matter more than expected.
- Moving in early may matter even under a temporary licence or tenancy at will.
- Part-payments do not always amount to paying substantially all of the price.
- A later change to the price can affect the tax due on completion.
- The listed special arrangements have separate rules that this source page does not set out.
Key takeaways
- Early possession or near-full payment can trigger LTT before completion.
- A later transfer can require a separate LTT return and extra tax.
- Keep clear evidence of possession, payments, and the full agreed price.
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 10 — substantial performance and later completion of a contract
- LTTA 2017 section 14 — when a contract has been substantially performed
- LTTA 2017 section 44 — duty to file a return and assess tax
- LTTA 2017 section 45 — special notification rules that override general rules
- LTTA 2017 Schedule 4 para 18 — public body leaseback arrangements and notification
- LTTA 2017 Schedule 7 para 44 — notification of certain partnership interest transfers
- LTTA 2017 Schedule 10 para 2 — notification of final alternative finance property transfer
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 guidance’s reference to exceptions is difficult to square with the unqualified wording of LTTA 2017 s.10(5)(a). The statutory wording should control, but the guidance should be checked for an update or clarification.
- No currency notice was available in the mounted skills. The current status of the bundled statutory text should be checked before relying on it for a live 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 signed contract and any later transfer document.
- Evidence of the date possession passed, including any right to rents.
- Evidence of payments made before completion.
- The price, any changes to it, and all amounts known when each return was prepared.
- Details of any public body, partnership, or alternative finance arrangement.
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 LTT returns where you take possession before completion [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 10 - substantial performance and later completion of a contract https://www.legislation.gov.uk/anaw/2017/1/section/10 - LTTA 2017 section 14 - when a contract has been substantially performed https://www.legislation.gov.uk/anaw/2017/1/section/14 - LTTA 2017 section 44 - duty to file a return and assess tax https://www.legislation.gov.uk/anaw/2017/1/section/44 - LTTA 2017 section 45 - special notification rules that override general rules https://www.legislation.gov.uk/anaw/2017/1/section/45 - LTTA 2017 Schedule 4 para 18 - public body leaseback arrangements and notification https://www.legislation.gov.uk/anaw/2017/1/schedule/4/paragraph/18 - LTTA 2017 Schedule 7 para 44 - notification of certain partnership interest transfers https://www.legislation.gov.uk/anaw/2017/1/schedule/7/paragraph/44 - LTTA 2017 Schedule 10 para 2 - notification of final alternative finance property transfer https://www.legislation.gov.uk/anaw/2017/1/schedule/10/paragraph/2 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#5548 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 guidance's reference to exceptions is difficult to square with the unqualified wording of LTTA 2017 s.10(5)(a). The statutory wording should control, but the guidance should be checked for an update or clarification. - No currency notice was available in the mounted skills. The current status of the bundled statutory text should be checked before relying on it for a live 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 3 September 2026
Useful article? You may find it helpful to read the original guidance here: LTT returns where you take possession before completion
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