When must you pay stamp duty after buying a property?
When SDLT is due
Stamp duty is normally payable by the deadline for the SDLT return. A later amendment or HMRC assessment can create a different payment deadline.
- Check the effective date
- Keep proof of payment
- Read later HMRC notices promptly
Scroll down for the full analysis.
Read the original guidance here:
When must you pay stamp duty after buying a property?
For most property purchases that need a return, you normally pay stamp duty when you meet the SDLT return deadline, which is 14 days after the effective date. Missing it can leave an unpaid tax bill.
What this rule is about
Payment and filing are closely linked. The law calls the deadline for sending the return the filing date. It normally sets the last day for paying SDLT too.
Because the filing date normally marks both the deadline for sending the return and the last day for paying SDLT, do not leave the tax payment until later. They are linked.
What the official source says
HMRC’s manual says that full details of the SDLT payment due date appear in separate HMRC guidance. The legislation sets out the main payment rules.
- Pay SDLT on a property transaction by the filing date for its return.
- For a notifiable transaction, the return is normally due within 14 days of its effective date.
- Pay extra SDLT from an amended return straight away.
- If you amend before the filing deadline, pay by that deadline instead.
- Pay tax shown in an HMRC assessment or determination within 30 days of issue.
What this means in practice
Even if your conveyancer arranges payment, the deadline still matters to you because you should check that the amount sent matches the SDLT return and retain evidence that it was paid. Keep that evidence.
- Keep a copy of the submitted return.
- Keep the payment confirmation.
- Check whether the return is later changed.
- Read any HMRC assessment promptly.
How to analyse it
Start with the event that created the amount due. The answer can differ where a return is changed or a relief later ends.
- Work out the transaction’s effective date.
- Decide whether a return was required.
- Find the filing date.
- Check whether the payment is the original SDLT amount.
- Check for an amendment, an assessment or a relief withdrawal.
Example
Emma completes a purchase on 1 May and it needs an SDLT return. On the normal rule, the return and payment are due within 14 days. If Emma later amends the return and more SDLT is due, the extra amount is normally due immediately, even though the original return and payment were due within 14 days. It does not wait.
Why this can be difficult in practice
People often focus on the completion date, yet when a return is later changed or HMRC issues an assessment, the new amount can carry its own payment deadline. That change is easy to miss. Some relief withdrawals and deferred-payment cases have special rules.
- Completion may not always be the effective date.
- A later tax bill may not follow the original deadline.
- The short HMRC manual page does not list every special case.
Key takeaways
- Normally, pay SDLT by the return filing date.
- A return is normally due within 14 days for a notifiable transaction.
- Extra tax after a change may be due sooner than expected.
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 76 — deadline for filing a land transaction return
- FA 2003 section 86 — when SDLT and later amounts must be paid
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 supplied HMRC page does not reproduce the fuller payment-date guidance to which it links.
- The controlled statutory text is current only to 17 November 2025, so current payment rules need checking before publication or use for a later transaction.
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 effective date of the transaction
- the SDLT return and its filing date
- proof of payment
- any amended return, assessment or relief-withdrawal notice
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 must you pay stamp duty after buying a property? [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 76 - deadline for filing a land transaction return https://www.legislation.gov.uk/ukpga/2003/14/section/76/2025-11-17 - FA 2003 section 86 - when SDLT and later amounts must be paid https://www.legislation.gov.uk/ukpga/2003/14/section/86/2025-11-17 HMRC's guidance page on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm50700 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 - The supplied HMRC page does not reproduce the fuller payment-date guidance to which it links. - The controlled statutory text is current only to 17 November 2025, so current payment rules need checking before publication or use for a later transaction. 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 must you pay stamp duty after buying a property?
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