Stamp duty on lease extensions and replacement leases
Lease extensions and SDLT
HMRC says that SDLT treatment can differ depending on whether an old lease continues or is replaced, and whether the old lease was subject to stamp duty or SDLT.
- Read the old and new lease documents together.
- Check whether there has been a surrender and replacement lease.
- Historic dates can be decisive.
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty on lease extensions and replacement leases
A lease extension does not always have one simple stamp duty land tax, or SDLT, treatment. The key question is how the extension happens. The old lease’s original stamp duty or SDLT treatment also matters.
What this rule is about
It may be called a lease extension. Labels do not settle the tax result. The parties may amend the existing lease, or end it and take a replacement lease.
That distinction may require you to assess rent differently for SDLT. It can matter for business premises and homes. HMRC says the same broad principles apply to both, although rent under most home leases will not in practice lead to SDLT.
What the official source says
HMRC’s manual treats extension methods differently. Two facts are central: whether the first lease was subject to stamp duty or SDLT, and whether a new lease replaces the old one.
- Find out whether the existing lease has simply changed.
- Determine whether the parties surrendered or ended the old lease.
- Check whether the landlord grants a replacement lease.
- Find the date of the original lease grant.
- Check whether the original transaction fell under stamp duty or SDLT.
HMRC’s manual gives its view of the rules. It is not the law itself. The detailed legal position comes from the legislation and can depend on the documents, their dates, whether the original lease fell under stamp duty or SDLT, and whether the new arrangement changes or replaces it. Read them closely.
What this means in practice
Adding years can still raise SDLT. Not every extension creates a fresh SDLT bill. The lease’s structure and history both matter.
- Keep the old lease, not just the new paperwork.
- Read any deed that ends or gives up the old lease.
- Compare the property covered by each lease.
- Record the rent under the old and new arrangements.
- Check whether the new lease starts before the old term would have ended.
How to analyse it
Begin with the documents. Then follow the timeline. What actually happened matters more than the heading on the deed.
- Identify the original lease and its grant date.
- Find out whether it was subject to stamp duty or SDLT.
- Identify the document that extends or replaces it.
- Decide whether the old lease continues or the parties surrender it.
- Compare the premises in the old and new leases.
- Check whether rent is payable under both leases for any shared period.
- Apply the law in force on the relevant dates.
Example
Sam has a shop lease with years left to run. The landlord and Sam agree a longer term. If they only change the existing lease, that calls for one analysis. If Sam gives up the old lease, receives a new lease of the same shop, and the documents and dates show a surrender and replacement rather than a variation, a different analysis applies. The distinction matters.
For some surrender-and-replacement arrangements, the law reduces the rent counted under the new lease for the period that overlaps with the old lease. The conditions are specific. It is not a general discount for every replacement lease.
Why this can be difficult in practice
This is the part people get wrong: an agreement described as an extension may contain a surrender and a new grant. A pre-SDLT stamp duty lease can change the answer.
- A document title may not match its legal effect.
- Small changes to the area covered can matter.
- Overlapping rent needs careful checking.
- Historic lease dates can change which rules are relevant.
- The supplied HMRC page does not set out every detailed outcome.
Key takeaways
- Start by asking how the parties extended the lease, not what they called it.
- Check the tax history of the original lease.
- A replacement lease can need a different SDLT analysis.
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 120 — brings further lease rules into schedule 17a
- FA 2003 Schedule 17A para 9 — reduces rent counted during some lease overlap periods
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 result cannot be worked out from the word ‘extension’ alone. The lease documents and the way the transaction is structured matter.
- A lease that appears to be extended may instead involve surrendering the old lease and granting a new one.
- The relevant law may depend on the dates of both the old lease and the replacement arrangement.
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 lease and any earlier variations
- the deed of variation, surrender or replacement lease
- the dates each document was signed and took effect
- the original term and the remaining term
- the rent under both the old and new arrangements
- whether the premises are the same or substantially the same
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 on lease extensions and replacement leases [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 120 - brings further lease rules into schedule 17a https://www.legislation.gov.uk/ukpga/2003/14/section/120/2025-11-17 - FA 2003 Schedule 17A para 9 - reduces rent counted during some lease overlap periods https://www.legislation.gov.uk/ukpga/2003/14/schedule/17A/paragraph/9/2025-11-17 Guidance page from HMRC on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm14090 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 result cannot be worked out from the word 'extension' alone. The lease documents and the way the transaction is structured matter. - A lease that appears to be extended may instead involve surrendering the old lease and granting a new one. - The relevant law may depend on the dates of both the old lease and the replacement arrangement. 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 on lease extensions and replacement leases
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