Subsale stamp duty: why connected buyers can face a higher figure
Subsale and connected buyer rule
HMRC’s example shows that a buyer who receives land through a subsale may need to use more than the price paid on the final contract.
- Unconnected parties use the onward price in HMRC’s example.
- Connected parties use the highest of three figures.
- The final buyer’s SDLT figure rises from £900,000 to £1 million in the example.
Scroll down for the full analysis.
Read the original guidance here:
Subsale stamp duty: why connected buyers can face a higher figure
Subsale stamp duty: why connected buyers can face a higher figure
When land is sold on before the first sale completes, stamp duty can apply to both steps. In HMRC’s example, a close link between the middle buyer and final buyer raises the final buyer’s figure from £900,000 to £1 million.
What this rule is about
A subsale occurs when a buyer contracts to buy land and then contracts to sell that same land before the first deal completes. All parties may complete on the same day. Money can still pass through the middle buyer.
That may sound like a single sale. For SDLT, however, it can involve more than one transaction.
The central question is simple: are the middle buyer and final buyer unconnected, or connected? In HMRC’s example, that fact alone changes the figure for the final buyer’s SDLT calculation.
What the official source says
HMRC’s manual uses three parties. A agrees to sell land to B for £1 million. Before that deal completes, B agrees to sell the same land to C for £900,000.
At one completion meeting, C pays B £900,000 while B pays A £1 million, even though the parties have entered into separate contracts for the same land. The contracts remain separate.
HMRC describes B’s separate contract with C as a free-standing transfer rather than an assignment of rights.
- If B and C are unconnected and act at arm’s length, HMRC says B files a return using £1 million.
- HMRC says B can claim full qualifying subsale relief, if all remaining conditions are met.
- HMRC says C files a return using the £900,000 paid to B.
- For C’s return, HMRC says A counts as the seller, even though C paid B.
- If B and C are connected, the minimum consideration rule governs C’s purchase.
- That rule uses the highest of three possible figures.
The manual is HMRC guidance. It explains HMRC’s view, but the legislation remains the law.
What this means in practice
Being connected changes more than a label on the return. It can increase the amount used to work out SDLT. In this example, C paid £900,000 but must use £1 million.
Why? The rule compares the normal figure with two minimum figures. It then selects the largest one.
- Start with the amount C pays B: £900,000.
- Check the amount due under A and B’s original contract: £1 million.
- Work out the net amounts paid by B and C together.
- C’s net amount is £900,000, because C paid that sum.
- B’s net amount is £100,000, being £1 million paid to A less £900,000 received from C.
- The two net amounts total £1 million.
- The highest figure is therefore £1 million.
HMRC’s example does not calculate a tax rate. Its point is the starting figure for the SDLT calculation.
How to analyse it
Do not start by considering only the price in the final contract. First, map every contract and payment. This shows whether the arrangement is the type covered by HMRC’s example.
- Identify the original sale contract and its agreed price.
- Identify the later contract and the price paid by the final buyer.
- Check whether both contracts completed before or at the same completion meeting.
- Decide whether the later arrangement is a free-standing transfer or an assignment of rights.
- Check whether the middle buyer and final buyer are connected.
- If they are connected, compare the three figures required by the minimum rule.
- Check whether the middle buyer meets every condition for qualifying subsale relief.
- Complete the final buyer’s return using the seller identified by the statutory rule.
This is where people go wrong: a lower price in the later contract does not always control the SDLT figure.
Example
Take the facts in HMRC’s example. A sells land to B for £1 million. B then sells it to C for £900,000, and both sales complete together.
If B and C are unconnected and act at arm’s length, HMRC says C’s SDLT figure is £900,000. B uses £1 million for B’s transaction, but HMRC says B may claim full relief if the other legal conditions hold.
Now change one fact: B and C are connected. C’s normal figure remains £900,000. The first minimum figure is £1 million, and the second is also £1 million because B and C’s net payments add up to that amount.
C must therefore use £1 million, the highest figure. The £100,000 gap matters.
Why this can be difficult in practice
Real deals rarely arrive as neatly as HMRC’s example, because contracts may use unusual wording, payments may pass directly between parties, and companies may appear within the ownership chain. Details matter.
Small details can change the answer. Keep the signed contracts and completion statements together while working through the figures.
- Do not assume the final contract price always decides the SDLT figure.
- Do not assume a payment route decides who counts as seller on the return.
- Do not assume B receives full relief without checking the further conditions.
- Do not use ordinary language alone to decide whether parties are connected.
- Do not treat HMRC’s manual as a replacement for the legislation.
Key takeaways
- A sale on before completion can create separate SDLT issues.
- Connected buyers can trigger a higher minimum figure.
- In HMRC’s example, C uses £1 million rather than £900,000.
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 — contracts completed by conveyance count as one transaction
- FA 2003 section 45 — rules for transactions before the original contract completes
- FA 2003 Schedule 2A para 1 — scope of the pre-completion transaction rules
- FA 2003 Schedule 2A para 2 — free-standing transfers before the original contract completes
- FA 2003 Schedule 2A para 3 — when the final buyer does not enter a transaction
- FA 2003 Schedule 2A para 9 — amount paid on a free-standing transfer
- FA 2003 Schedule 2A para 10 — who counts as seller in the final purchase
- FA 2003 Schedule 2A para 12 — minimum amount rule for connected parties
- FA 2003 Schedule 2A para 13 — first minimum amount in a connected subsale
- FA 2003 Schedule 2A para 14 — second minimum amount based on net payments
- FA 2003 Schedule 2A para 16 — relief for a qualifying subsale
- FA 2003 Schedule 2A para 18 — further conditions affecting qualifying subsale relief
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 source does not give enough facts to decide whether a real arrangement is a free-standing transfer rather than an assignment of rights.
- The source does not explain whether particular people or companies are connected; that needs checking against the legal definition.
- The supplied statutory material is current only to 17 November 2025, so transactions after that date need 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 original contract between the first seller and middle buyer
- the onward contract between the middle buyer and final buyer
- completion statements showing every payment and receipt
- evidence of whether the middle and final buyers are connected
- details needed to test every condition for qualifying subsale relief
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 Subsale stamp duty: why connected buyers can face a higher figure [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 - contracts completed by conveyance count as one transaction https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 45 - rules for transactions before the original contract completes https://www.legislation.gov.uk/ukpga/2003/14/section/45/2025-11-17 - FA 2003 Schedule 2A para 1 - scope of the pre-completion transaction rules https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/1/2025-11-17 - FA 2003 Schedule 2A para 2 - free-standing transfers before the original contract completes https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/2/2025-11-17 - FA 2003 Schedule 2A para 3 - when the final buyer does not enter a transaction https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/3/2025-11-17 - FA 2003 Schedule 2A para 9 - amount paid on 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 in the final purchase https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/10/2025-11-17 - FA 2003 Schedule 2A para 12 - minimum amount rule for connected parties https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/12/2025-11-17 - FA 2003 Schedule 2A para 13 - first minimum amount in a connected subsale https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/13/2025-11-17 - FA 2003 Schedule 2A para 14 - second minimum amount based on net payments https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/14/2025-11-17 - FA 2003 Schedule 2A para 16 - relief for a qualifying subsale https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/16/2025-11-17 - FA 2003 Schedule 2A para 18 - further conditions affecting qualifying subsale relief https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/18/2025-11-17 HMRC's guidance page on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm21600 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 source does not give enough facts to decide whether a real arrangement is a free-standing transfer rather than an assignment of rights. - The source does not explain whether particular people or companies are connected; that needs checking against the legal definition. - The supplied statutory material is current only to 17 November 2025, so transactions after that date need 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 1 September 2026
Useful article? You may find it helpful to read the original guidance here: Subsale stamp duty: why connected buyers can face a higher figure
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