SDLT when you move in or pay before completion
SDLT before completion
You may trigger stamp duty before completion if you move in early or make a substantial payment. A later completion can also need reporting.
- Check possession and payments
- Use the earlier SDLT date where substantial performance occurred
- Review any changes before completion
Scroll down for the full analysis.
Read the original guidance here:
SDLT when you move in or pay before completion
If you move in before completion, pay most or all of the price, and thereby take possession or satisfy the payment test, the contract may be substantially performed. That earlier SDLT filing point can arise before completion, and the position may need to be considered again when completion eventually occurs under the contract. The timing matters.
What this rule is about
Most people expect stamp duty to follow completion day. Usually, that is right. But where the deal has gone far enough in real life before the paperwork completes, the law brings the date forward.
You may need to calculate SDLT using the earlier date. If substantial performance has already happened, you cannot simply wait for the transfer deed.
What the official source says
HMRC’s manual explains that, if substantial performance occurs before legal completion, parties may need to report both that event and the later completion as separate stages. Two events may matter. For a freehold purchase or an assignment of an existing lease, HMRC requires a further return if changes between those events mean that more or less SDLT is now due.
Where substantial performance takes place before completion, the legislation treats the contract as the transaction at that earlier point, although the deal has not yet legally completed. Later completion is also notifiable. SDLT already due on the contract is taken into account. Only the excess arises on completion.
- You take possession of all or substantially all of the property.
- You pay all or substantially all of the amount due, where there is no rent.
- You make the first rent payment, where rent is the only amount due.
- You meet either payment test where the deal includes rent and another payment.
What this means in practice
Moving in early is not a harmless convenience. Paying most of the money before completion is not harmless either. Either event can make stamp duty due earlier than expected.
- Check whether you had possession, including a right to rental income.
- Check every payment made before completion.
- Keep the contract, licence and payment records together.
- Compare the deal at substantial performance with the final completed deal.
How to analyse it
Begin with what happened rather than what the parties called it. When considering whether you took possession, include a temporary licence.
- Find the date the contract was signed.
- Find the date you first had possession or a right to income.
- List each payment and what it was for.
- Decide whether substantial performance happened before completion.
- Work out the SDLT position at that earlier date.
- Compare the final terms and payments with the earlier position.
- Check whether completion creates extra SDLT and a further filing.
Example
Amir agrees to buy a freehold house for £300,000. Before legal completion, he pays the full £300,000 and moves in. The contract can count as substantially performed then, making that the key SDLT date.
Even where he later completes on the same terms and no figures change, that completion remains a separate notifiable event for SDLT purposes under the legislation. It should create no extra SDLT under section 44(8).
Why this can be difficult in practice
Possession is often the difficult question. Keys, access for works and a short-term licence may point in different directions. The payment structure may also be unclear when solicitors hold money or where it includes rent.
A new lease requires separate treatment. The law regards a substantially performed agreement for a new lease as a notional lease. It then adjusts that treatment when the actual lease is granted.
- Having keys does not always settle whether possession was taken.
- A deposit is not automatically a substantial payment.
- A changed price, rent or term may alter the SDLT due at completion.
- An agreement for a new lease does not follow the ordinary freehold route.
Key takeaways
- Stamp duty can arise before legal completion.
- Early possession and major payments are the key warning signs.
- Compare the early deal with the final deal before completion.
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 — contract treated as transaction after substantial performance; events that make a contract substantially performed; possession includes rents and temporary occupation rights; when payment counts as a substantial amount; later completion and additional SDLT after early performance
- FA 2003 section 76 — duty to file a return for notifiable transactions; return must include a self-assessment of SDLT
- FA 2003 Schedule 17A para 12A — special SDLT treatment for agreements for new leases
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
- Whether possession was of all or substantially all of the property can depend on the contract, access rights and what happened in practice.
- Whether a payment was a substantial amount depends on the type and structure of the amount paid.
- Changes between early performance and completion must be identified before deciding whether more SDLT is due.
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 completion documents
- Dates of payment, access and occupation
- Bank records showing amounts paid
- Any licence, lease or agreement allowing early possession
- Details of terms or payment changes 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 SDLT when you move in or pay 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 - contract treated as transaction after substantial performance https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 44 - events that make a contract substantially performed https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 44 - possession includes rents and temporary occupation rights https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 44 - when payment counts as a substantial amount https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 44 - later completion and additional SDLT after early performance https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 76 - duty to file a return for notifiable transactions https://www.legislation.gov.uk/ukpga/2003/14/section/76/2025-11-17 - FA 2003 section 76 - return must include a self-assessment of SDLT https://www.legislation.gov.uk/ukpga/2003/14/section/76/2025-11-17 - FA 2003 Schedule 17A para 12A - special SDLT treatment for agreements for new leases https://www.legislation.gov.uk/ukpga/2003/14/schedule/17A/paragraph/12A/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/sdltm07800 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 - Whether possession was of all or substantially all of the property can depend on the contract, access rights and what happened in practice. - Whether a payment was a substantial amount depends on the type and structure of the amount paid. - Changes between early performance and completion must be identified before deciding whether more SDLT is due. 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: SDLT when you move in or pay before completion
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