Stamp duty where a contract right is assigned before completion
Assignment of contract rights and SDLT
HMRC’s example says that a buyer who takes over a contract before completion may need to include both the land price and the assignment payment in their SDLT calculation.
- £1 million paid to the owner plus £100,000 for the contract right gives £1.1 million.
- The person assigning the rights may have a notional transaction and possible full relief.
- The result depends on the documents, dates and statutory conditions.
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty where a contract right is assigned before completion
Stamp duty where a contract right is assigned before completion
If someone sells you their right to buy land before the original deal completes, stamp duty land tax can include both payments you make. In HMRC’s example, after the contract right is assigned before completion, the final buyer pays £1 million to the owner and £100,000 for that right. HMRC says SDLT uses £1.1 million.
What this rule is about
A property deal can change hands before completion. The first buyer may not buy the land at all. Instead, they can sell their right under the signed contract to somebody else.
That sounds like one purchase. For SDLT, it can create more than one tax result.
The key point is simple: the £100,000 paid for the contract right does not disappear because it goes to the first buyer, not the landowner. HMRC’s example adds it to the £1 million paid on completion.
What the official source says
HMRC’s manual gives a worked example of rights being assigned before completion, tracing the sequence from the original contract through the assignment to C’s eventual completion of the purchase. A agrees to sell land to B for £1 million. B then assigns its rights under that contract to C for £100,000. C completes and pays A the £1 million.
- HMRC says the assignment falls within the rules for a transaction before completion.
- HMRC identifies B as the person transferring the contract rights.
- HMRC identifies C as the person receiving those rights.
- HMRC says C does not enter a tax transaction merely by receiving the rights.
- Instead, HMRC says the law treats C as the buyer when C completes the land purchase.
- For C, HMRC includes both the £1 million and the £100,000.
- That gives C an SDLT amount of £1.1 million for calculation purposes.
- HMRC says A is the seller shown for C’s transaction.
HMRC also says the rules create a notional transaction for B. In plain terms, the law treats B as having made a tax transaction even though B never takes title to the land.
HMRC says that notional transaction uses £1 million, not £1.1 million. B may claim full relief. That outcome depends on the conditions in Schedule 2A paragraphs 15 and 18.
What this means in practice
The final buyer needs to look beyond the price paid to the landowner, because any amount paid for the right to step into the contract may matter too. This is the part people can miss.
You might think the assignment payment is only a private deal between two buyers. HMRC’s example says it forms part of the amount used for the final buyer’s SDLT calculation.
- Keep the original contract and the assignment agreement together.
- Record the price paid to the landowner.
- Record the separate payment for the contract rights.
- Check who completed the purchase and took title to the land.
- Make sure the return names the seller in the way the legislation requires.
- Do not assume the first buyer has no SDLT paperwork because they never completed.
- Check whether the statutory relief conditions apply to the first buyer.
In HMRC’s example, although B makes a return after assigning the rights and never taking title to the land, B claims full relief if the statutory conditions are satisfied. The relief is conditional.
How to analyse it
Start with the documents and the timeline. Labels can mislead. What matters is whether a person has transferred rights under a contract before the land purchase completes.
- Who signed the original contract with the landowner?
- What land did that contract cover?
- Did the first buyer assign all or part of its rights?
- Who paid for those rights, and how much?
- Who paid the landowner on completion?
- Did completion occur after the assignment?
- Was the contract substantially performed before the assignment?
- Which version of the law applied on the relevant dates?
- Can the first buyer meet every condition for the available relief?
Then separate the two positions. First work out the final buyer’s total payment connected with getting the land. Next consider the notional transaction for the person who assigned the rights and any relief.
Example
Here is HMRC’s example in everyday terms. A agrees to sell land to B for £1 million. Before completion, B sells the contract right to C for £100,000. C then completes the purchase and pays A £1 million.
HMRC says C’s SDLT calculation uses £1.1 million, combining the £1 million paid to A with the £100,000 paid to B for the contract right. The manual says A is the seller for C’s return. It also says B has a notional transaction using £1 million, with full relief available if B meets the statutory conditions.
No SDLT bill can be calculated from these figures alone, because the example does not identify what kind of land is involved or which rates applied on the date. Those details are absent.
Why this can be difficult in practice
These cases often involve fast-moving deals and several linked documents. A payment may be described as a fee, profit share or deposit. Its label does not settle the SDLT answer.
Timing matters too. The rules in this example concern an assignment before completion. Substantial performance before the assignment can change the analysis.
- A side letter may contain part of the payment for the rights.
- An assignment may cover only part of the land or contract rights.
- More than one assignment can make the transaction chain harder to follow.
- The relief for the first buyer has conditions that the short example does not set out.
- The manual gives HMRC’s view, not a substitute for the legislation.
- The transaction date may affect which statutory version applies.
Key takeaways
- The final buyer’s SDLT amount can include the land price and the assignment payment.
- The first buyer may still need a return, despite never completing the land purchase.
- Check the dates, documents and relief conditions before settling the SDLT position.
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 as one land transaction; meaning of completion between the same parties
- FA 2003 section 76 — duty to deliver a land transaction return
- FA 2003 Schedule 2A para 1 — meaning of a pre-completion transaction; transactions entered into before contract completion
- FA 2003 Schedule 2A para 2 — assignments of rights before completion
- FA 2003 Schedule 2A para 3 — assignment does not itself create buyer’s transaction
- FA 2003 Schedule 2A para 4 — section 44 completion wording does not prevent treatment; condition for transferee’s land transaction treatment; transferee treated as buyer on completion; amount used for transferee’s SDLT calculation; reading consideration rules for the transferee
- FA 2003 Schedule 2A para 5 — notional transaction for the person assigning rights; amount used for the notional transaction; meaning of amounts A and B
- FA 2003 Schedule 2A para 8 — seller named for transferee’s transaction
- FA 2003 Schedule 2A para 15 — full relief for qualifying transferor transaction
- FA 2003 Schedule 2A para 18 — conditions attached to transferor relief
- FA 2003 Schedule 4 para 1 — money or value given for a transaction
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 example gives no transaction date. The applicable version of Schedule 2A and any transitional rules must be checked against that date.
- The supplied statutory bundle confirms that section 45 points to Schedule 2A, but does not include the operative text of that Schedule. Current primary legislation should be checked before relying on the manual’s analysis for a live transaction.
- The example only covers a simple assignment before completion. Different facts, including partial assignments, several assignments or substantial performance, may produce a different result.
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 between the seller and the first buyer.
- The assignment agreement and proof of the assignment payment.
- Completion records showing who paid the original seller and how much.
- The date of the assignment, completion and any substantial performance.
- Facts needed to test the relief conditions in Schedule 2A paragraphs 15 and 18.
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 contract right is assigned 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 - contracts completed as one land transaction https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 44 - meaning of completion between the same parties https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 76 - duty to deliver a land transaction return https://www.legislation.gov.uk/ukpga/2003/14/section/76/2025-11-17 - FA 2003 Schedule 2A para 1 - meaning of a pre-completion transaction https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/1/2025-11-17 - FA 2003 Schedule 2A para 1 - transactions entered into before contract completion https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/1/2025-11-17 - FA 2003 Schedule 2A para 2 - assignments of rights before completion https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/2/2025-11-17 - FA 2003 Schedule 2A para 3 - assignment does not itself create buyer's transaction https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/3/2025-11-17 - FA 2003 Schedule 2A para 4 - section 44 completion wording does not prevent treatment https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/4/2025-11-17 - FA 2003 Schedule 2A para 4 - condition for transferee's land transaction treatment https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/4/2025-11-17 - FA 2003 Schedule 2A para 4 - transferee treated as buyer on completion https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/4/2025-11-17 - FA 2003 Schedule 2A para 4 - amount used for transferee's SDLT calculation https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/4/2025-11-17 - FA 2003 Schedule 2A para 4 - reading consideration rules for the transferee https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/4/2025-11-17 - FA 2003 Schedule 2A para 5 - notional transaction for the person assigning rights https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/5/2025-11-17 - FA 2003 Schedule 2A para 5 - amount used for the notional transaction https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/5/2025-11-17 - FA 2003 Schedule 2A para 5 - meaning of amounts A and B https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/5/2025-11-17 - FA 2003 Schedule 2A para 8 - seller named for transferee's transaction https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/8/2025-11-17 - FA 2003 Schedule 2A para 15 - full relief for qualifying transferor transaction https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/15/2025-11-17 - FA 2003 Schedule 2A para 18 - conditions attached to transferor relief https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/18/2025-11-17 - FA 2003 Schedule 4 para 1 - money or value given for a transaction https://www.legislation.gov.uk/ukpga/2003/14/schedule/4/paragraph/1/2025-11-17 HMRC's guidance page on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm21590 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 example gives no transaction date. The applicable version of Schedule 2A and any transitional rules must be checked against that date. - The supplied statutory bundle confirms that section 45 points to Schedule 2A, but does not include the operative text of that Schedule. Current primary legislation should be checked before relying on the manual's analysis for a live transaction. - The example only covers a simple assignment before completion. Different facts, including partial assignments, several assignments or substantial performance, may produce a different result. 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 contract right is assigned before completion
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