What documents are needed to review a Stamp Duty Land Tax position after a property purchase?

Introduction

People often ask what paperwork is needed when a Stamp Duty Land Tax (SDLT) adviser is asked to review a completed property transaction. This usually happens where the buyer wants to check whether the SDLT return was completed correctly, whether any relief may have been missed, or whether there may be grounds for an amendment or reclaim.

In most cases, the starting point is not a complicated legal argument but the core conveyancing documents. Those papers show what was bought, for how much, on what terms, and how the transaction was reported to HMRC.

The Question

A buyer had completed a property purchase and wanted an SDLT specialist to begin reviewing the matter straight after completion. The buyer asked the conveyancer to send the key completion documents so that the SDLT review could start.

The practical question was: which documents are normally needed first for an SDLT review following completion of a residential property transaction?

Nick’s Explanation

Nick’s response was practical. Once completion had taken place, the essential documents needed to start the SDLT review were:

• the signed and dated TR1 transfer;
• the signed and dated sale contract;
• the SDLT5 certificate; and
• the completion statement.

In substance, Nick’s point was that once those documents were available, the SDLT team could begin assessing the transaction. He also indicated that the file appeared to contain what was needed to get started, subject to any further check by the case administrator.

That is a sensible approach. These documents usually provide the minimum documentary foundation for understanding the chargeable transaction and checking how the tax position has been handled.

The Law

SDLT is charged under the Finance Act 2003. The key legal framework includes:

• the charge to SDLT on land transactions;
• the calculation of chargeable consideration;
• the requirement to file a land transaction return in most notifiable cases; and
• the issue of an SDLT5 certificate following submission of the return.

In broad terms, SDLT is assessed by reference to the legal effect and commercial substance of the transaction. HMRC therefore looks at the transaction documents, not just a summary description of what happened.

The transfer deed helps show what interest in land was acquired and by whom. The contract helps establish the bargain made between the parties, including price, conditions and any special provisions. The SDLT return and SDLT5 certificate show what was reported to HMRC. The completion statement helps evidence the sums actually paid on completion and can sometimes help identify whether any payments were treated as consideration.

Analysis

Each of the requested documents serves a distinct function in an SDLT review.

The TR1 transfer is important because it is the formal transfer of title. It usually confirms the buyer, the seller, the property transferred and the execution details. This can matter where there is any issue about the identity of the purchaser, joint ownership, or whether the legal transfer matches the tax filing.

The sale contract is often the most informative document. It may show:

• the agreed purchase price;
• whether there were any allowances, incentives or retentions;
• whether any fixtures, fittings or chattels were dealt with separately;
• whether there were special conditions affecting consideration; and
• whether the transaction formed part of a wider arrangement.

The SDLT5 certificate is not itself the full tax analysis, but it confirms that a return was submitted and ties the transaction to HMRC’s record. In practice, it is a key administrative document when checking what has already been filed.

The completion statement is also useful because it shows the money flow on completion. While not every item on a completion statement is chargeable consideration for SDLT purposes, it can help identify what sums were paid, to whom, and for what stated reason. That can be relevant if there is any question over whether the amount reported for SDLT matches the actual transaction.

Depending on the issue being reviewed, these four documents may be enough to begin the analysis, but further papers are sometimes needed. For example:

• the SDLT return itself;
• title documents and Land Registry entries;
• leases, licences or deeds of variation;
• planning or building reports where a claim depends on property condition or use;
• valuation evidence; and
• correspondence explaining unusual payment terms or transaction structure.

If the proposed SDLT argument involves whether a dwelling was uninhabitable or not suitable for use as a dwelling at the effective date of transaction, the evidence burden is usually much higher than many buyers expect. The condition thresholds are now relatively high following Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799. A buyer would normally need strong contemporary evidence showing that the property was not merely in poor condition, but fell outside the statutory concept of a dwelling for SDLT purposes.

Outcome

The practical answer is that the core documents needed to start an SDLT review after completion are usually:

• the signed TR1;
• the signed sale contract;
• the SDLT5 certificate; and
• the completion statement.

Those documents will often allow an adviser to begin checking whether the SDLT treatment appears correct and whether any further evidence is needed.

Practical Steps

If you want an SDLT specialist to review a completed purchase, it is sensible to gather the following straight away:

• the signed transfer deed;
• the signed contract;
• the SDLT5 certificate;
• the completion statement;
• a copy of the SDLT return if available;
• the title register and title plan;
• any lease or supplemental deed;
• any valuation or survey relevant to the SDLT issue; and
• any correspondence explaining unusual aspects of the transaction.

You should also check that the names of the purchasers, the price, the completion date and the property details are consistent across all documents. Inconsistencies can affect both the technical SDLT analysis and the practical process of amending a return or making a reclaim.

If the issue concerns a claim that the property was not suitable for use as a dwelling, gather all contemporaneous evidence from the completion date, such as survey reports, photographs, contractor reports and any local authority material. Given the current case law, weak or retrospective evidence is unlikely to be enough.

Conclusion

For most post-completion SDLT reviews, the first documents to obtain are the TR1, the sale contract, the SDLT5 certificate and the completion statement. They provide the basic legal and factual record of the transaction and allow an adviser to assess whether the SDLT position needs further investigation.

Legal References Used

• Finance Act 2003
• Amarjeet and Tajinder Mudan v The Commissioners for HMRC [2025] EWCA Civ 799

This page was last updated on 22 March 2026.

See all questions and answers categorized in this sitemap. Or use Google site search below.