Stamp duty contracts: when paying or moving in can trigger SDLT
When a property contract can trigger SDLT early
SDLT usually follows formal completion. If you take possession, pay rent or pay almost all the price first, the earlier event may set the SDLT date.
- Signing alone is usually not enough
- Possession and payments can change the date
- The exact facts and documents matter
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty contracts: when paying or moving in can trigger SDLT
Stamp duty contracts: when paying or moving in can trigger SDLT
Signing a contract to buy land or property does not normally trigger stamp duty straight away. Where, before formal completion, the buyer pays almost all the price, makes rent payments, or takes possession, the SDLT date can move forward from the date otherwise expected. That can matter greatly.
What this rule is about
Exchange of contracts and completion are the two key moments in most property purchases. Completion is when the sale is formally carried out. Usually, SDLT is dealt with by reference to completion.
There is an important exception. Before completion, substantial performance of the contract means that the law treats the contract itself as the transaction. The important date then becomes the date of that early event.
In simple terms, substantial performance means that the deal has moved beyond a promise on paper. The buyer has already received most of what the contract was meant to provide, or has paid most of what it requires.
What the official source says
HMRC’s manual explains that merely entering into a contract does not automatically make SDLT due, where the contract is to be completed by a conveyance. It is generally dealt with on completion.
However, because HMRC says that substantial performance before formal completion changes the result, the legislation treats the contract as the property transaction, with its effective date set by substantial performance. That is the result.
- Taking possession of all, or almost all, of the property can trigger the rule.
- The right to receive rents or profits can count as possession.
- Paying all, or almost all, of a price that is not rent can trigger the rule.
- If rent is the only payment, the first rent payment can trigger the rule.
- If the deal includes rent and other payments, either the first rent payment or payment of almost all non-rent sums can trigger it.
The law uses the phrase “substantially performed”. It does not set a fixed percentage for “almost all”.
What this means in practice
The completion-statement date may not control SDLT. Where access, occupation, or payments occurred before that date, each arrangement must be considered because any of them may be as important as formal completion. Check the timeline.
This catches arrangements where a buyer moves in under a short-term licence while paperwork is unfinished. It can also catch a buyer who pays the full price before the formal transfer takes place.
- Check whether you received keys or the right to occupy before completion.
- Check whether you could use nearly all the land or property.
- Check the date of every payment, including rent.
- Separate rent from the rest of the amount paid for the deal.
- Keep records that show when possession and payments actually happened.
Even where the parties call an arrangement temporary, it may still amount to possession if the buyer has rights that go beyond limited access while the paperwork remains unfinished. The label does not decide it.
How to analyse it
Start with the contract, then build a timeline. The question is not simply when you signed. It is whether something happened before completion which put the deal into effect in real life.
- Is there a contract for a property transaction that was meant to end in a formal transfer?
- What date did the parties sign the contract?
- What date was formal completion planned, and what date did it actually happen?
- Before completion, did the buyer take possession of all or nearly all the property?
- Before completion, did the buyer pay all or nearly all of the non-rent price?
- Was rent paid for the first time before completion?
- Did someone transfer rights under the contract or direct the seller to transfer to another person?
If the answer to one of the possession or payment questions is yes, the earlier date may be the effective date for SDLT. Arrangements involving a different final buyer or transferred contract rights have separate rules and need careful checking.
Example
Amir agrees to buy a warehouse for £300,000. Completion is planned for 30 June. On 10 June, he pays the full £300,000. He receives the keys and can use the whole warehouse. The formal transfer does not take place until 30 June.
On these facts, 10 June is likely to be the key date because the contract has been substantially performed before completion. The result does not depend on the parties describing the keys as “early access”. What matters is what Amir could actually do and what he had paid.
Why this can be difficult in practice
The rule can become difficult in practice when a deal has been partly carried out. Access for repairs, storage or surveys may be available to a buyer who has not taken possession of substantially the whole property. The facts and the legal rights given to the buyer both matter.
- Access for a limited purpose is not automatically the same as possession.
- Possession of part of a site may not mean possession of substantially the whole site.
- A deposit is not automatically payment of almost all the price.
- There is no statutory percentage that settles what “substantially” means.
- An agreement can still be a contract even if it has an informal name.
- A conveyance can include an instrument other than a document labelled as a transfer.
HMRC’s manual is useful for showing its approach, but it is not the law itself. Finance Act 2003 is the controlling source.
Key takeaways
- Signing a contract alone does not normally trigger SDLT.
- The SDLT date can move forward because of early possession, a first rent payment, or payment of almost all the price.
- Build a clear timeline and keep evidence of access, possession and payments.
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 later or substantially performed early; when a contract is substantially performed; meaning of contract conveyance and completion
- FA 2003 section 44A — early performance in third-party conveyance arrangements
- FA 2003 section 45A — effective date after a transfer of rights
- FA 2003 section 119 — default and special effective dates
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
- Whether possession is of substantially the whole property can depend on the exact rights granted and the facts on the ground.
- Whether an amount is substantially the whole of the non-rent price is fact-sensitive because the legislation gives no numerical percentage.
- This page does not resolve the detailed rules for assignments, sub-sales, leases or arrangements involving a third-party buyer.
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 later variations
- The planned and actual completion dates
- Evidence of when keys, occupation or possession rights were given
- Payment records for the price, rent and deposits
- Documents showing any assignment or transfer of contract rights
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 contracts: when paying or moving in can trigger SDLT [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 later or substantially performed early https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 44 - when a contract is substantially performed https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 44 - meaning of contract conveyance and completion https://www.legislation.gov.uk/ukpga/2003/14/section/44/2025-11-17 - FA 2003 section 44A - early performance in third-party conveyance arrangements https://www.legislation.gov.uk/ukpga/2003/14/section/44A/2025-11-17 - FA 2003 section 45A - effective date after a transfer of rights https://www.legislation.gov.uk/ukpga/2003/14/section/45A/2025-11-17 - FA 2003 section 119 - default and special effective dates https://www.legislation.gov.uk/ukpga/2003/14/section/119/2025-11-17 Guidance page from HMRC on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm07700 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 - Whether possession is of substantially the whole property can depend on the exact rights granted and the facts on the ground. - Whether an amount is substantially the whole of the non-rent price is fact-sensitive because the legislation gives no numerical percentage. - This page does not resolve the detailed rules for assignments, sub-sales, leases or arrangements involving a third-party buyer. 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 31 August 2026
Useful article? You may find it helpful to read the original guidance here: Stamp duty contracts: when paying or moving in can trigger SDLT
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