How do I get my SDLT UTRN to claim a refund of the additional property surcharge?

Introduction

People often search for this when they have paid Stamp Duty Land Tax at the higher rates for an additional dwelling and later realise they may be entitled to a refund. A common problem is that HMRC’s online refund process asks for a UTRN, sometimes described as the transaction reference from the SDLT return, but the buyer does not have it to hand because the original return was filed by a conveyancing solicitor.

The practical question is usually not whether a refund is possible in principle, but how to obtain the reference number and what documents are needed to make the claim.

The Question

A buyer paid SDLT including the higher rates for an additional residential property. They now want to apply for a refund, but the online process asks for the SDLT transaction reference and they cannot find it in their paperwork. Their conveyancer has been slow to respond. What should they do to obtain the reference and make the refund claim?

Nick’s Explanation

Nick’s main point was practical. In anonymised form, his advice was:

“To obtain the SDLT transaction reference, ask the conveyancing solicitor who dealt with the purchase for the SDLT filing receipt. If that is not available, contact HMRC’s Stamp Duty Land Tax team directly and ask for the transaction reference. You may also need documents from the purchase and evidence of the sale of the previous home.”

He also identified the sort of paperwork that is commonly useful when dealing with a refund claim:

• the SDLT filing receipt or SDLT5 certificate showing the transaction reference
• the transfer document, often a TR1
• the completion statement
• the sale contract or purchase contract
• evidence that the previous main residence was sold

Earlier in the correspondence, Nick also noted an important timing point: SDLT returns are normally filed electronically by an authorised person such as a conveyancer, accountant or tax adviser, and late filing can lead to penalties. Although that point related to filing rather than refund claims, it underlines the importance of acting promptly when SDLT paperwork is missing.

The Law

SDLT is charged under the Finance Act 2003. For residential purchases, higher rates can apply where the buyer owns more than one dwelling at the effective date of the transaction. The higher rates rules are contained in Schedule 4ZA to the Finance Act 2003.

Where a buyer pays the higher rates because they have not yet sold their previous main residence, a refund may later be available if that previous main residence is disposed of within the time allowed by the legislation. The claim is made to HMRC.

In broad terms, the relevant legal framework includes:

• Finance Act 2003, which governs SDLT generally
• Schedule 4ZA to the Finance Act 2003, which sets out the higher rates for additional dwellings and the refund mechanism where a previous main residence is later sold
• HMRC SDLT guidance on online and paper returns, including filing and payment administration
• HMRC guidance on claiming a repayment of the higher rates for additional dwellings

The refund process is administrative as well as legal. In practice, HMRC will usually require enough information to identify the original SDLT return and to verify that the statutory conditions for repayment are met.

Analysis

The position can be broken down into a few steps.

First, identify whether the refund being sought is the additional dwelling surcharge refund. This usually arises where the buyer paid the higher residential rates because, at the time of purchase, they still owned their previous home. If they then sold that previous home within the statutory period, they may be entitled to reclaim the surcharge element.

Second, locate the SDLT transaction reference. The online HMRC process typically requires the unique transaction reference connected to the SDLT return. Buyers often do not personally file the return, so the reference is commonly held by the conveyancing solicitor who submitted it. The most direct route is therefore to request:

• the SDLT5 certificate
• the SDLT filing receipt
• a copy of the submitted SDLT return

Third, if the conveyancer does not respond, contact HMRC’s Stamp Duty Land Tax team directly. HMRC may be able to help identify the transaction from the property purchase details and confirm the relevant reference, although they will usually need enough information to trace the file.

Fourth, gather the supporting documents. Nick’s suggested list is sensible because it helps prove both the original purchase and the later sale of the previous home. In many cases, the key issue is not only finding the reference number but also showing that the statutory refund conditions are satisfied.

Fifth, check the time limit for making the repayment claim. A buyer should not assume the claim can be made at any time. The legislation and HMRC guidance impose time limits, so delay can be costly.

Sixth, distinguish this type of refund from other SDLT disputes. This is not the same as amending an SDLT return because of a calculation error, nor is it the same as claiming that a property was not suitable for use as a dwelling. If the issue is whether the property was uninhabitable or not suitable for use, the condition thresholds are now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. That is a different line of argument from the additional dwelling surcharge refund considered here.

Outcome

If a buyer needs the SDLT transaction reference in order to claim a refund of the higher rates for an additional dwelling, the first step is to obtain the SDLT filing receipt or SDLT5 from the conveyancer who filed the return. If that does not work, the next step is to contact HMRC directly and ask for help tracing the transaction.

Once the reference is available, the buyer should submit the refund claim with supporting evidence showing the original purchase, the later sale of the previous main residence, and any other documents HMRC asks for.

Practical Steps

1. Ask the conveyancer for a copy of the SDLT5 certificate, SDLT filing receipt, or submitted SDLT return.
2. Request the purchase file documents, including the completion statement, transfer document and contract.
3. Collect evidence of the sale of the previous main residence, such as the sale completion statement and transfer paperwork.
4. If the conveyancer is unresponsive, contact HMRC’s Stamp Duty Land Tax team and ask them to help identify the transaction reference.
5. Check the statutory deadline for the repayment claim and submit the claim as soon as possible.
6. If there is uncertainty about eligibility, obtain written SDLT advice before submitting the claim.

Conclusion

Where a buyer has paid the higher SDLT rates and later becomes entitled to a refund, the missing transaction reference is usually an administrative problem rather than a legal barrier. The practical solution is to obtain the SDLT filing receipt or SDLT5 from the original conveyancer, or failing that, ask HMRC to help trace the transaction. The claim should then be supported with the purchase documents and evidence of the sale of the previous home.

Legal References Used

• Finance Act 2003
• Finance Act 2003, Schedule 4ZA
• HMRC guidance: Stamp Duty Land Tax online and paper returns
• HMRC guidance on repayment of the higher rates for additional dwellings
• Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799

This page was last updated on 22 March 2026.

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