Stamp duty when you buy more shares in a shared ownership home
Shared ownership staircasing
First-time buyer relief cannot be claimed on a later purchase of shares in a shared ownership home. It is not withdrawn from the original lease merely because later purchases take the total paid above £500,000.
- Check whether a market-value election was made.
- Without one, the 80% ownership point matters.
- Keep records of each share purchase.
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty when you buy more shares in a shared ownership home
Stamp duty when you buy more shares in a shared ownership home
When you buy more shares in your shared ownership home, a process called staircasing, first-time buyer stamp duty relief cannot be claimed again on those later purchases. Properly claimed original relief remains intact.
What this rule is about
Shared ownership starts with an initial share. You can buy more later. SDLT can apply at different points. Market-value election partly determines the answer.
That choice matters. Without that election, the 80% point is the key one.
What the official source says
HMRC’s manual says that, although first-time buyer relief does not apply when you make a later staircasing purchase, later purchases do not withdraw original relief even if all payments exceed £500,000. The original claim stands.
- You may have claimed first-time buyer relief on the original grant of the shared ownership lease.
- You cannot claim that relief again when buying a further share.
- The total of the original and later payments can exceed £500,000.
- That fact alone does not take away the relief on the original lease.
What this means in practice
If you made no market-value election, a staircasing purchase is exempt under the shared ownership rules provided that your total share immediately afterwards is 80% or less. The 80% threshold matters.
Normal residential SDLT rules govern that purchase. They govern later staircasing purchases too.
- Check your ownership percentage after each purchase, not just before it.
- Do not assume the first-time buyer relief applies to the later share.
- Do not treat all staircasing payments as linked to the original lease for this purpose.
- Keep the original SDLT return and the paperwork for every later share purchase.
How to analyse it
Begin with the documents from the first purchase. The key question is not simply how much you have paid in total. It is which SDLT route applied and what percentage you own after the new purchase.
- Confirm that the arrangement is a shared ownership lease covered by the SDLT rules.
- Check whether a market-value election was made on the original lease.
- Check whether first-time buyer relief was claimed on that original transaction.
- Work out your total percentage share immediately after the new purchase.
- If there was no election, identify whether that purchase takes you above 80%.
- Apply the normal residential SDLT rules to the purchase above 80% and later purchases.
Example
Amir buys a 50% share and properly claims first-time buyer relief on the original lease. He later buys another 20%, taking his share to 70%. With no market-value election, that later purchase is exempt.
He then buys a further 20%, taking his share to 90%. First-time buyer relief cannot cover that purchase, and the normal residential SDLT rules apply to it.
Even if all three payments total more than £500,000, the relief on Amir’s original lease is not withdrawn just for that reason.
Why this can be difficult in practice
Total home price can distract here. What matters is your election and resulting ownership. Check the initial election, then each percentage.
- A market-value election changes the route through the shared ownership rules.
- Buying a share that reaches exactly 80% is different from buying one that takes you above 80%.
- The later payment may be taxable even though the original lease received first-time buyer relief.
- HMRC’s manual explains HMRC’s view; the legislation is the law.
Key takeaways
- You cannot use first-time buyer relief again when staircasing.
- Staircasing does not by itself withdraw relief on the original lease.
- Without a market-value election, the purchase taking you above 80% can trigger SDLT.
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 Schedule 9 para 4A — when shared-ownership staircasing is exempt from SDLT
- FA 2003 Schedule 9 para 4B — why the original lease is not linked
- FA 2003 Schedule 9 para 16 — first-time buyer relief does not cover staircasing (provision not found on legislation.gov.uk)
- FA 2003 Schedule 6ZA para 5 — when first-time buyer relief can be withdrawn
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 effective date matters. The supplied statutory text is current only to 17 November 2025, so the position for a later transaction needs checking against current legislation.
- Whether an election was made, and the buyer’s percentage share immediately after each purchase, are facts that can change the answer.
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 shared ownership lease and SDLT return
- Any market-value election or amendment to the original return
- Documents showing each staircasing payment and resulting ownership percentage
- The effective date of each transaction
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 when you buy more shares in a shared ownership home [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 Schedule 9 para 4A - when shared-ownership staircasing is exempt from SDLT https://www.legislation.gov.uk/ukpga/2003/14/schedule/9/paragraph/4A/2025-11-17 - FA 2003 Schedule 9 para 4B - why the original lease is not linked https://www.legislation.gov.uk/ukpga/2003/14/schedule/9/paragraph/4B/2025-11-17 - FA 2003 Schedule 9 para 16 - first-time buyer relief does not cover staircasing https://www.legislation.gov.uk/ukpga/2003/14/schedule/9/paragraph/16/2025-11-17 - FA 2003 Schedule 6ZA para 5 - when first-time buyer relief can be withdrawn https://www.legislation.gov.uk/ukpga/2003/14/schedule/6ZA/paragraph/5/2025-11-17 Guidance page from HMRC on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm29890 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 effective date matters. The supplied statutory text is current only to 17 November 2025, so the position for a later transaction needs checking against current legislation. - Whether an election was made, and the buyer's percentage share immediately after each purchase, are facts that can change the answer. 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 when you buy more shares in a shared ownership home
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