When a property contract is substantially performed for stamp duty
Substantial performance before completion
A property contract can count for SDLT before the formal transfer takes place. This may happen when you take possession of all or almost all of the property, or when a substantial amount is paid.
- Possession can include rights to receive rent.
- Temporary occupation can still matter.
- The facts and dates need careful checking.
Scroll down for the full analysis.
Read the original guidance here:
When a property contract is substantially performed for stamp duty
When a property contract is substantially performed for stamp duty
You may trigger stamp duty land tax before the formal transfer date. This can happen if you take possession of most or all of the property, or pay most or all of the price. In SDLT terms, the contract may then be substantially performed.
What this rule is about
Usually, a property purchase appears simple because you sign a contract first and complete later, although the interval between those events can matter greatly.
Where substantial performance occurs before completion, the law treats the contract itself, rather than the later transfer, as the relevant property transaction for SDLT purposes. Its effective date is the substantial-performance date, rather than the later completion date.
What the official source says
HMRC’s manual says there are two main routes. Under one route, a buyer, or a person connected with that buyer, takes possession of all or almost all of the property. Under the other, a substantial amount of the amount due under the deal is paid or provided. HMRC also says the answer always depends on the facts.
- Taking possession of the whole property can meet the test.
- Taking possession of almost all of it can also meet the test.
- A connected person’s possession can count.
- Receiving rent, or gaining the right to receive it, can count as possession.
- A temporary licence or lease does not stop possession counting.
- Where there is no rent, almost all of the price must be paid or provided.
- Where rent is the only payment, the first rent payment meets the statutory test.
- Where there is rent and another payment, either route can meet the test.
What this means in practice
The important question is not only when you complete. Ask what happened between signing and completion.
Between signing and completion, moving in early, taking control of a commercial building, or receiving its rent can, depending on the arrangements, bring the SDLT date forward. That matters.
Paying nearly all the price before the transfer takes place can do the same.
- Check any early-access arrangement carefully.
- Check when money was paid, and what it was for.
- Do not assume a temporary right to occupy is irrelevant.
- Keep the contract, payment records and access documents together.
How to analyse it
Start with the actual arrangements, rather than their label. A document called a licence may still matter. So may informal access agreed by email.
- Was there a contract for a property transfer?
- Did completion happen later?
- Who took possession before completion?
- How much of the property did they control?
- Did they receive rent or gain that right?
- How much of the price, or rent, had been paid?
- On what date did the relevant event happen?
Example
Hannah agrees to buy a shop for £300,000, with completion planned for 30 June.
On 4 April, the seller gives Hannah control of the whole shop under a temporary licence, and Hannah starts trading there.
If the arrangement gives Hannah possession of the whole property, even though it is described as a temporary licence and the transfer follows later, the contract is substantially performed on 4 April. That is the starting point. The later transfer date does not change it.
Why this can be difficult in practice
People often focus only on moving in. That is too narrow. Possession can involve control, rent and rights over the property. Equally, early keys or a deposit do not automatically settle the answer. The detail of the contract and what each side actually did matters.
- Access for surveys or works may differ from possession.
- Part of a property may be too little to meet the test.
- A payment may be a deposit rather than almost all the price.
- Rent arrangements can change when the payment test is met.
Key takeaways
- Stamp duty can arise before formal completion.
- Possession and payment are separate routes to substantial performance.
- The answer depends on the real facts, not just the paperwork’s label.
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 — when an uncompleted contract counts as a land transaction; when possession or payment makes a contract substantially performed
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
- What counts as substantially the whole of a property, or substantially the whole of its price, can depend on the facts.
- Having keys or making a deposit will not always settle whether possession or substantial payment has occurred.
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 signed contract and any side agreement
- The date and terms on which access or occupation began
- Evidence of who received rent or had the right to receive it
- Bank records showing payments and their purpose
- Any temporary licence or lease
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 When a property contract is substantially performed for stamp duty [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 - when an uncompleted contract counts as a land transaction https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 44 - when possession or payment makes a contract substantially performed https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 Guidance page from HMRC on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm07850 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 - What counts as substantially the whole of a property, or substantially the whole of its price, can depend on the facts. - Having keys or making a deposit will not always settle whether possession or substantial payment has occurred. 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: When a property contract is substantially performed for stamp duty
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