Stamp duty when you move in before a property purchase completes

Early possession can change the SDLT timing

If a property contract is substantially performed before completion, SDLT can arise then as well as on the later final transfer.

• Taking possession can trigger the earlier event.
• Paying almost all the price can also trigger it.
• Only any extra tax is due at completion.

Scroll down for the full analysis.

Stamp duty when you move in before a property purchase completes

If you move in or pay most of the price before a property purchase completes, stamp duty may arise early. When the final transfer follows, you must report that too. You only pay extra SDLT if the tax then due is higher.

What this rule is about

A signed contract will not usually trigger SDLT on its own, unless it is substantially performed before completion and before the final paperwork transfers the property. That changes the position. Important events can happen before final transfer.

That can bring the first SDLT event forward. It can also mean there are two reports, rather than one.

What the official source says

HMRC’s manual explains this result. The legal rule is in Finance Act 2003. The rule applies when early performance occurs, the contract is later completed, and a final transfer follows that earlier performance under the same arrangement. That sequence matters.

• You, or someone connected with you, take possession of all, or almost all, of the property.
• You pay all, or almost all, of the amount due for it.
• The contract then counts as a land deal for SDLT before completion.
• The contract and the final transfer must both be reported.
• At completion, only any increase in SDLT is due.

What this means in practice

Do not treat the final completion date as the only relevant date, because using the property or making major payments earlier may create the first SDLT event. Check the earlier date.

• Keep a clear record of when you got possession.
• Keep evidence of each payment and its date.
• Make sure the earlier event is not missed when the final transfer completes.

How to analyse it

Start with the facts, not the label on the arrangement. Ask whether the contract was substantially performed before it completed.

• What did the contract say would happen?
• When did you take possession, if at all?
• How much had you paid by that date?
• Did the final transfer complete that contract?

Example

Before the final transfer, Ravi moves into a flat and has already paid almost all the price, so SDLT of £4,000 is due on that earlier event. The earlier event matters. At completion, the SDLT calculation is £5,250. Ravi reports the completion and pays the £1,250 difference.

Why this can be difficult in practice

People often focus on the completion date. That can be the expensive mistake. The real issue is whether possession or payment crossed the line earlier.

• There is no fixed percentage for “almost all” of the price.
• Short-term access may not be the same as possession of the property.
• An agreement for lease may follow a different statutory rule.

Key takeaways

• Moving in early can create an SDLT event before completion.
• Both the early contract event and final transfer may need reporting.
• Completion creates extra SDLT only if its tax is higher.

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 — early performance and later completion of property contracts; separate rules for certain agreements for lease

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.

• SDLTM00890

Where this is not settled

• The law does not give a fixed percentage for when an amount paid is ‘substantially the whole’ of the price.
• Whether possession is of the whole, or substantially the whole, of the property can depend on the facts.
• The supplied statutory text is current only to 17 November 2025. A later transaction needs a current-law check.

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 final transfer document
• Dates of payment, possession and completion
• Evidence of the amounts paid before completion
• Details of who took possession and what part of the property they used

Explore this with an AI

An AI will give you plenty of information. It will not take responsibility for any of it. When a conveyancing solicitor asks for professional tax advice, responsibility is what they are really asking for: a named adviser who has looked at your facts and carries indemnity insurance for the view they reach.

Email me your circumstances and I will give you my honest opinion, free. About half the time that is the end of it. If your solicitor wants it in writing, a formal letter of advice starts at £350, no VAT.

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Nick Garner

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 move in before a property purchase completes

[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 - early performance and later completion of property contracts
  https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17
- FA 2003 section 44 - separate rules for certain agreements for lease
  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/sdltm00890

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 law does not give a fixed percentage for when an amount paid is 'substantially the whole' of the price.
- Whether possession is of the whole, or substantially the whole, of the property can depend on the facts.
- The supplied statutory text is current only to 17 November 2025. A later transaction needs a current-law check.

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 move in before a property purchase completes

View all HMRC SDLT Guidance Pages Here