Stamp duty and novation: when a buyer is replaced before completion
Novation before completion
HMRC’s example says that replacing a buyer through a true novation can increase the amount used for stamp duty.
- The old contract must end and a new one begin.
- The new buyer’s payment to the old buyer can count.
- The documents and transaction date need checking.
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty and novation: when a buyer is replaced before completion
Stamp duty and novation: when a buyer is replaced before completion
If one buyer is replaced before a property deal completes, stamp duty may be worked out using both the price paid for the land and the sum paid to replace that buyer. HMRC’s example reaches £1.1 million, not £1 million. Here, the paperwork makes the difference.
What this rule is about
More than simply putting a new name into an existing deal, a novation ends the old contract in HMRC’s example. A new contract then starts between the seller and the replacement buyer.
That distinction sounds formal. It can change the amount used to calculate stamp duty.
This example concerns land in England or Northern Ireland. Before completion, while the original buyer has not yet bought the land, it deals with an arrangement made at that stage.
What the official source says
HMRC’s manual gives a three-party example. A agrees to sell land to B for £1 million. Before completion, A, B and C sign a deed of novation, under which C takes B’s place and pays B £100,000 for giving up B’s rights.
- A and B are released from their duties to each other.
- The original contract between A and B no longer exists.
- A new contract is made between A and C.
- C completes that new contract and pays A £1 million.
HMRC says this is a free-standing pre-completion transfer, not an assignment of rights under the original contract. Instead, C’s right to require the transfer of the land arises from the new contract rather than the old one.
On HMRC’s view, C has not entered into a separate land deal merely by signing the novation. For HMRC, the relevant deal completes when C buys the land from A.
What this means in practice
For C, the amount used to work out stamp duty is £1.1 million. It includes the £1 million paid to A and the £100,000 paid to B. Because B does not own the land, the payment to B is not ignored.
HMRC says B is not the buyer in a land deal on these facts. So B does not file a stamp duty land tax return or claim relief for the novation.
- C should expect the £100,000 replacement payment to matter for stamp duty.
- The completion papers should show the £1 million paid to A.
- The novation deed should show why and when £100,000 was paid to B.
- Calling a document a novation is not enough by itself.
How to analyse it
Start with the legal effect, rather than the label on the deed. Before deciding whether the first contract survived, whether the parties ended it, and whether they made a new one, ask that question first. It is the starting point.
- Read the original contract and identify the original buyer and seller.
- Check whether completion or substantial performance happened before the replacement.
- Read the novation deed for releases between the original parties.
- Check whether the incoming buyer gets rights under the old contract or a new contract.
- List every sum the incoming buyer gives to get the land.
- Match those sums to bank records and completion statements.
Those facts should be considered together. Although a deed can use the word “novation”, its terms may leave important rights under the first contract in place and require closer analysis. Labels do not decide it.
Example
Here is HMRC’s illustration. A agrees to sell land to B for £1 million. Before completion, C pays B £100,000 to step in, while A and B release each other and A makes a fresh contract with C. C then pays A £1 million on completion.
HMRC treats C as the buyer when the new contract completes. According to HMRC, the amount used for stamp duty is £1,100,000: £1 million paid to A plus £100,000 paid to B.
Why this can be difficult in practice
People often focus only on who receives the main price. That is the common mistake here. Even so, the extra payment may still form part of what the new buyer gives to secure the land.
There is another problem: an assignment and a novation can look similar in everyday terms. Both may replace one person with another before completion. Their legal effect can be different.
- The deed may not clearly say whether the first contract has ended.
- Side letters or emails may affect what the parties really agreed.
- A payment described as compensation may need closer examination.
- The date of the original contract can determine which historic rules apply.
HMRC’s manual states its view of the example. It is guidance, not law. If they point in a different direction, the legislation and the actual documents take priority.
Key takeaways
- A true novation replaces the old contract with a new one.
- HMRC’s example includes the replacement payment in the stamp duty figure.
- The wording and effect of the documents decide the answer.
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 43 — meaning of a land transaction and buyer
- FA 2003 section 44 — completed contract and conveyance treated as one
- FA 2003 section 45 — pre-completion arrangements covered by Schedule 2A
- FA 2003 Schedule 2A para 1 — meaning of a pre-completion transaction
- FA 2003 Schedule 2A para 2 — free-standing transfers and assignments of rights
- FA 2003 Schedule 2A para 3 — when a transferee enters no land transaction
- FA 2003 Schedule 2A para 9 — amount counted when a transfer completes
- FA 2003 section 76 — duty to file a stamp duty return
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
- A document called a novation may not have the effect described in HMRC’s example. Its actual terms and what the parties did matter.
- The supplied statutory bundle does not include the full text of Schedule 2A, so the historic statutory position needs checking against an official source for the relevant date.
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 signed deed of novation
- evidence that the first contract ended
- the completion statement and payment records
- the dates of the original contract, novation and 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 Stamp duty and novation: when a buyer is replaced 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 43 - meaning of a land transaction and buyer https://www.legislation.gov.uk/ukpga/2003/14/section/43/2025-11-17 - FA 2003 section 44 - completed contract and conveyance treated as one https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 45 - pre-completion arrangements covered by Schedule 2A https://www.legislation.gov.uk/ukpga/2003/14/section/45/2025-11-17 - 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 2 - free-standing transfers and assignments of rights https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/2/2025-11-17 - FA 2003 Schedule 2A para 3 - when a transferee enters no land transaction https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/3/2025-11-17 - FA 2003 Schedule 2A para 9 - amount counted when a transfer completes https://www.legislation.gov.uk/ukpga/2003/14/schedule/2A/paragraph/9/2025-11-17 - FA 2003 section 76 - duty to file a stamp duty return https://www.legislation.gov.uk/ukpga/2003/14/section/76/2025-11-17 HMRC's guidance page on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm21690 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 - A document called a novation may not have the effect described in HMRC's example. Its actual terms and what the parties did matter. - The supplied statutory bundle does not include the full text of Schedule 2A, so the historic statutory position needs checking against an official source for the relevant date. 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 and novation: when a buyer is replaced before completion
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