Stamp duty when you take possession before completion
In brief
SDLT can arise before legal completion if a property contract is substantially performed.
- Possession can trigger the rule.
- Paying nearly all the price can trigger it.
- The supplied HMRC page is archived.
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty when you take possession before completion
You may face stamp duty before the legal transfer completes if, under the contract, you take possession or pay nearly all the price before completion. The date can matter a great deal.
What this rule is about
Usually, the law treats a property contract and the later transfer as one deal. But where a contract has been substantially performed before completion, the law applies a separate rule that may treat it differently for SDLT purposes. That rule matters.
In simple terms, real events may take the deal far enough, before legal completion occurs and while the contract remains in force, for SDLT to arise early. Timing matters.
What the official source says
HMRC archives the supplied page. It does not give its old examples. Instead, it directs readers to another part of HMRC’s SDLT manual. HMRC guidance is not the law; section 44 sets the legal test.
- Taking all or almost all of the property can count.
- A connected person taking it can also count.
- Receiving rent, or the right to receive it, counts as possession.
- Paying all or almost all of a non-rent price can count.
- For a rent-only deal, the first rent payment can count.
What this means in practice
When events meet the test before completion, the law treats the contract as the property deal for SDLT. The date of substantial performance, rather than completion, then sets its effective date.
- Check any early move-in date.
- Check whether rent rights started early.
- Check payments made before completion.
How to analyse it
Start with what happened, not the label used in the paperwork.
- Was there a contract for a later legal transfer?
- Did you, or someone connected with you, take possession?
- Was the whole or nearly all of the price paid?
- Did this happen before the legal transfer completed?
Example
Amir agrees to buy a house for £300,000. He pays the full £300,000 and moves in on 10 June. The legal transfer completes on 1 July. On these facts, Amir’s full payment and move-in on 10 June, before the legal transfer completes on 1 July, can substantially perform the contract and make 10 June the SDLT effective date. This example does not calculate the tax.
Why this can be difficult in practice
People often focus only on the completion date. That can be the wrong date. The hard question is whether what was paid or occupied was “substantially” the whole.
- A temporary licence may still involve possession.
- Part payment will not always be enough.
- The archived page gives no detail on transfers of rights.
Key takeaways
- Completion is not always the SDLT date.
- Early possession can trigger the rule.
- The contract and payment history matter.
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
- FA 2003 section 44 — when a contract is substantially performed before completion
Official guidance
The pages below are HMRC’s guidance. Guidance is not law. It sets out how HMRC 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. HMRC can also change or withdraw guidance, and it may not cover your facts.
Where this is not settled
- The archived source does not explain the replacement guidance or its examples about transfers of rights.
- Whether possession or an amount paid is substantially the whole depends on the 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 signed contract and any later changes
- The date possession or rent rights began
- Proof of payments and the amount still unpaid
- Details of any transfer of rights before completion
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 UK Stamp Duty Land Tax (SDLT), which applies in England and Northern Ireland. MY QUESTION Stamp duty when 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 - FA 2003 section 44 - when a contract is substantially performed before completion https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 Guidance page from HMRC on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm01090 HOW I WANT YOU TO ANSWER 1. Work from the legislation above. Read it before answering. Guidance from HMRC 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 archived source does not explain the replacement guidance or its examples about transfers of rights. - Whether possession or an amount paid is substantially the whole depends on the facts. Do not give me a conclusion you cannot support from the provisions above.
Legislation links show Finance Act 2003 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 31 August 2026
Useful article? You may find it helpful to read the original guidance here: Stamp duty when you take possession before completion
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