Using a Power of Attorney to sign an SDLT return
Power of Attorney and SDLT returns
An attorney may make the SDLT return declaration for an individual, but only where a signed written Power of Attorney gives authority for the return matters.
- Check the document’s wording.
- Keep evidence of the signed authority.
- Do not confuse this route with the separate agent process.
Scroll down for the full analysis.
Read the original guidance here:
Using a Power of Attorney to sign an SDLT return
If you cannot sign your stamp duty land tax return yourself, an attorney may be able to make the required declaration for you. Written authority must cover the return.
What this rule is about
An SDLT return includes a declaration that the information is correct and complete, to the best of the buyer’s knowledge. That declaration matters because it identifies who stands behind the information sent to HMRC.
Sometimes a person cannot deal with the return themselves. They may have appointed somebody else to act for them. Section 81B allows that person to make the declaration.
What the official source says
HMRC’s manual confirms it. An attorney may declare for an individual. HMRC says this applies to the declaration required for the return, including the arrangements it describes for paper and electronic returns.
- The person signing must act for an individual buyer.
- They must be authorised to act for that individual.
- The authority must be a Power of Attorney in writing.
- The individual must have signed the Power of Attorney.
- The authority must cover the matters dealt with in the SDLT return.
This does not mean that every document called a Power of Attorney will work. Its wording must give authority wide enough for the return.
What this means in practice
When the buyer is an individual, has signed a written Power of Attorney, and that authority extends to the return, the attorney may make the declaration. The return can proceed.
- Keep a copy of the signed Power of Attorney with the transaction papers.
- Check who gave the authority and who will make the declaration.
- Read the scope of the authority, not just its title.
- Make sure it covers the facts and statements in this SDLT return.
Where an authorised agent completes a return in a form specified by HMRC, a separate statutory arrangement applies, even if no attorney is involved. The routes differ.
How to analyse it
Begin with the document and match it against the return. The relevant authority is the authority in place when the declaration was made.
- Is the buyer an individual rather than a company?
- Is there a Power of Attorney in writing?
- Did that individual sign it?
- Does it authorise the named attorney to act on return-related matters?
- Which declaration route does the return form use?
That last question can be overlooked. HMRC’s manual connects the issue with both the normal buyer declaration and the separate agent declaration process.
Example
Nadia is buying a home but cannot deal with the SDLT paperwork herself. She signed a written Power of Attorney appointing her brother, Sam, to deal with her property tax affairs. If its wording covers the matters in the SDLT return, Sam can make the declaration for Nadia; if it only permits bank-account management, he cannot. Bank-account authority alone is insufficient.
Why this can be difficult in practice
Most problems come from treating the document’s name as the answer. It is not. Both the wording and the return process matter.
- A signed document may still be too narrow for the SDLT return.
- An agent’s role is not automatically the same as authority under a Power of Attorney.
- More than one buyer may mean more than one required declaration.
- HMRC’s manual is its view, while the legislation is the legal test.
Key takeaways
- An attorney can make an SDLT declaration for an individual buyer.
- The Power of Attorney must be written and signed.
- Its wording must cover the matters in the return.
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 81B — declarations made by an authorised attorney
- FA 2003 Schedule 10 para 1 — contents and buyer declaration on an SDLT return
- FA 2003 Schedule 10 para 1A — agent declarations for specified return forms
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 legislation is current only to 17 November 2025. The position for a return or transaction affected by later changes needs checking against the current official legislation.
- Whether a particular Power of Attorney covers the return depends on its wording and the matters it authorises.
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 written Power of Attorney
- Proof that the individual signed it
- Wording showing authority for the SDLT return matters
- The return form and declaration route being used
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 Using a Power of Attorney to sign an SDLT return [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 81B - declarations made by an authorised attorney https://www.legislation.gov.uk/ukpga/2003/14/section/81B/2025-11-17 - FA 2003 Schedule 10 para 1 - contents and buyer declaration on an SDLT return https://www.legislation.gov.uk/ukpga/2003/14/schedule/10/paragraph/1/2025-11-17 - FA 2003 Schedule 10 para 1A - agent declarations for specified return forms https://www.legislation.gov.uk/ukpga/2003/14/schedule/10/paragraph/1A/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/sdltm31905 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 legislation is current only to 17 November 2025. The position for a return or transaction affected by later changes needs checking against the current official legislation. - Whether a particular Power of Attorney covers the return depends on its wording and the matters it authorises. 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: Using a Power of Attorney to sign an SDLT return
Search Land Tax Advice with Google
