Stamp duty where a buyer transfers their contract before completion
Free-standing transfers at a glance
Where a buyer takes over a property deal before completion, HMRC says the transfer payment is added to the amount otherwise paid for the property.
- The legal form of the arrangement matters.
- A subsale and a novation have different consequences for the original buyer.
- HMRC’s manual is guidance, not the law itself.
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty where a buyer transfers their contract before completion
Stamp duty where a buyer transfers their contract before completion
If someone passes their place in a property deal to you before completion, HMRC may calculate stamp duty using both amounts you pay. Both sums count towards stamp duty.
What this rule is about
Sometimes the original buyer does not complete the purchase. Instead, another person takes over or replaces them before the seller transfers the property.
People call this a free-standing transfer. It is a type of pre-completion arrangement, which means it takes place before the original contract completes.
The key question is not simply who receives the keys. What matters is how the parties change the deal.
What the official source says
HMRC’s manual says that, for the person taking over a free-standing transfer, HMRC adds the amount paid for that transfer to the amount they otherwise pay for the property. HMRC then uses the combined figure as the relevant amount for stamp duty.
- HMRC includes the amount paid to take over the earlier buyer’s position.
- HMRC also includes the amount otherwise paid for the property.
- HMRC says the original seller will usually count as the seller for this later purchase.
- That seller rule has exceptions in Schedule 2A paragraph 10.
The manual also distinguishes between a subsale and a novation. A novation replaces one party to the contract. A subsale produces a different result for the original buyer.
What this means in practice
Paying a separate sum to step into a property deal does not usually fall outside the stamp duty calculation. It can increase the amount used to work out the tax.
For the person leaving the deal, the result may differ sharply. In a subsale, HMRC normally regards the original contract as completed, or substantially performed, for that person. A novation does not have that effect.
- In a subsale, HMRC may still treat the original buyer as making a property purchase.
- In a novation, HMRC says the original buyer has no property purchase to report.
- HMRC says that person need not file a stamp duty return or claim relief in a novation.
- Do not assume that a payment between buyers has no tax effect.
How to analyse it
Start with the documents, not the name used in an email. Calling an arrangement a novation will not make it one if the legal effect is different.
- Check whether the parties completed the original contract before the change.
- Identify the people who held rights and duties under the original contract afterwards.
- Work out whether the original buyer sold onward or the parties replaced that buyer in the contract.
- List every amount paid by the new buyer, including any sum for taking over the deal.
- Check whether the parties completed the original contract or substantially performed it.
Example
Amir agrees to buy a flat for £200,000. Before completion, Beth pays Amir £10,000. She also pays £200,000 for the flat. If the rule covers this free-standing transfer, HMRC uses £210,000: the £10,000 transfer payment plus the £200,000 property price. This example does not calculate the stamp duty due.
Why this can be difficult in practice
Paperwork often decides the outcome. A deal may look like one buyer stepping aside, yet the old buyer may still have rights or duties that point towards a subsale.
You might think completion is the only key date. It is not. Taking possession can trigger substantial performance early. Paying most of the price can do so too.
- Informal side agreements can change the tax result.
- People may miss separate payments when they work out the total amount.
- The paragraph 10 exceptions may matter where the normal seller rule does not fit.
Key takeaways
- A transfer payment can be added to the property price for stamp duty.
- A subsale and a novation can lead to different results.
- Read the original contract and replacement documents together.
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 contracts count as completed or substantially performed
- FA 2003 section 45 — pre-completion assignments subsales and related transactions
- FA 2003 Schedule 2A para 9 — amount included for a free-standing transfer
- FA 2003 Schedule 2A para 10 — who counts as seller for the later purchase
- FA 2003 Schedule 2A para 11 — supplementary rules for free-standing transfers
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 supplied HMRC page does not explain the exceptions in Schedule 2A paragraph 10.
- A label used by the parties will not by itself settle whether their arrangement is a subsale or a novation.
- The bundled statutory extract does not contain the text of Schedule 2A paragraphs 9 to 11, so that text should be checked against current legislation.
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 original sale contract
- the agreement transferring or replacing the buyer
- proof of each amount paid
- completion and possession dates
- any document showing whether the original buyer remained bound
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 where a buyer transfers their contract 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 contracts count as completed or substantially performed https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 45 - pre-completion assignments subsales and related transactions https://www.legislation.gov.uk/ukpga/2003/14/section/45/2025-11-17 - FA 2003 Schedule 2A para 9 - amount included for a free-standing transfer https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/9/2025-11-17 - FA 2003 Schedule 2A para 10 - who counts as seller for the later purchase https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/10/2025-11-17 - FA 2003 Schedule 2A para 11 - supplementary rules for free-standing transfers https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/11/2025-11-17 HMRC's guidance page on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm21550 HOW I WANT YOU TO ANSWER 1. Work from the legislation above. Read it before answering. HMRC guidance is HMRC's 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 supplied HMRC page does not explain the exceptions in Schedule 2A paragraph 10. - A label used by the parties will not by itself settle whether their arrangement is a subsale or a novation. - The bundled statutory extract does not contain the text of Schedule 2A paragraphs 9 to 11, so that text should be checked against current legislation. 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 1 September 2026
Useful article? You may find it helpful to read the original guidance here: Stamp duty where a buyer transfers their contract before completion
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