Guide to SDLT Liability: Responsibilities and Deadlines for Purchasers and Trustees

Who is responsible for filing and paying SDLT

The main rule is that the purchaser must file the SDLT return and pay any tax due. This is usually due within 14 days of the effective date of the transaction, although older transactions before 1 March 2019 had a 30-day deadline. Extra care is needed where there are joint buyers, partnerships, trustees, companies, or where a further return is required later.

• The buyer remains legally responsible for SDLT, even if a solicitor or conveyancer deals with the paperwork.
• Joint purchasers are jointly and severally liable, so HMRC can pursue any one of them for the full amount.
• Where a partnership buys land, all partners at the effective date, and anyone who becomes a partner later, can be responsible.
• Where trustees are liable, any responsible trustee may pay, including trustees in office at the effective date and those appointed later.
• If a further SDLT return is needed after the original filing, it must generally be filed and any extra tax paid within 30 days.

Scroll down for the full analysis.

Who is responsible for filing and paying SDLT

This page explains who must file a Stamp Duty Land Tax return and pay the tax, and when they must do it. The basic rule is simple: the purchaser is responsible. But the position can become more complicated where there are joint buyers, partnerships, trustees, or company purchasers, or where a further return is needed after the original filing.

What this rule is about

SDLT is charged on land transactions in England and Northern Ireland. Once a transaction has taken place, someone must deal with the compliance side: filing the land transaction return and paying any tax due.

The source material is about legal responsibility for that filing and payment. In other words, it answers questions such as:

• Who is legally on the hook for the SDLT return?
• Who must pay the SDLT?
• What is the filing deadline?
• What happens if there is more than one purchaser, or the buyer is a partnership or trustees?

This matters because SDLT obligations attach to the legally responsible person or persons. If the return is late, or the tax is not paid on time, interest or penalties can arise even if the parties assumed someone else would deal with it.

What the official source says

The official material states that the purchaser must file the land transaction return and pay SDLT within 14 days of the effective date of the transaction.

For older transactions, the source notes that before 1 March 2019 the deadline was 30 days from the effective date.

The source also says that in some cases a further return is required. Where that happens, the time limit for filing that further return and paying any additional tax due is 30 days.

It then identifies special responsibility rules for certain types of purchaser:

• If the purchaser is a company, special rules apply.
• If there are joint purchasers, they are jointly and severally liable for the tax. This means each buyer is fully liable for the whole amount, although payment by one of them can discharge the liability.
• If a partnership acquires a chargeable interest, all partners at the effective date, and anyone who later becomes a partner, are treated as responsible partners for the transaction.
• If trustees of a settlement are liable to pay SDLT, interest, or penalties, payment may be made by any one or more of the responsible trustees. Responsible trustees include those who were trustees at the effective date and anyone who becomes a trustee later.

What this means in practice

In an ordinary purchase, the buyer is the person responsible for SDLT compliance. Even if a conveyancer prepares and submits the return, the legal responsibility still sits with the purchaser.

The 14-day deadline is short. It runs from the effective date of the transaction, not from completion of registration formalities or from when the buyer receives a tax calculation. In many straightforward cases, the effective date will be completion, but the source material here does not define that term. The key practical point is that the SDLT deadline is tied to that legally defined date.

If there is more than one buyer, HMRC is not limited to pursuing only one “main” purchaser. Joint and several liability means any one of the joint purchasers may be pursued for the full amount if SDLT is unpaid.

For partnerships and trusts, responsibility is wider than simply the persons who signed the purchase documents. The source makes clear that later partners and later trustees can fall within the category of persons responsible in relation to the tax.

If a further return is required, the buyer should not assume the original filing ends the matter. A later event may trigger a fresh filing obligation and a further payment deadline.

How to analyse it

A sensible way to approach this issue is to ask the following questions:

• Who is the purchaser for SDLT purposes? Start with the legal buyer under the transaction.
• Are there multiple purchasers? If so, remember that liability may be joint and several.
• Is the purchaser a company? If yes, check whether any company-specific SDLT rules affect liability or procedure.
• Is the buyer a partnership? If so, identify who the partners were at the effective date, and note that later partners may also become responsible partners.
• Are trustees buying as trustees of a settlement? If yes, identify the responsible trustees, including later trustees.
• What is the effective date of the transaction? The filing and payment deadline runs from that date.
• Is only the initial return needed, or could a further return be required later?

This framework helps separate two issues that are often blurred together: who has the substantive tax liability, and who must handle the filing and payment mechanics. In many cases the same people are responsible for both, but the source is specifically focused on compliance responsibility.

Example

Illustration: A and B buy a property together. A agrees privately with B that B will deal with the SDLT return and payment. B fails to do so on time. Under the rule on joint purchasers, HMRC is not restricted to chasing only B. A and B are jointly and severally liable, so either of them may be pursued for the full SDLT debt.

Illustration: A partnership buys land. At the effective date, X, Y and Z are partners. Later, Q joins the partnership. The source material indicates that all partners at the effective date, and any person who becomes a partner afterwards, are responsible partners in relation to the transaction.

Why this can be difficult in practice

The main difficulty is that the person handling the transaction is not always the same as the person legally responsible for SDLT. Buyers often assume that because a solicitor or agent submits the return, that adviser carries the legal liability. The source does not support that assumption. The purchaser remains the responsible person.

Another difficulty is identifying the right persons in more complex ownership structures. With joint buyers, trusts and partnerships, the pool of legally responsible persons may be wider than expected. That has practical consequences for recovery action, internal indemnities between parties, and who should be involved in correcting errors.

A further point of uncertainty in real cases is whether a later event triggers a further return. The source confirms that this can happen and gives the 30-day time limit, but it does not list the situations in which a further return is required. That needs to be checked against the relevant SDLT rules for the particular transaction.

Key takeaways

• The purchaser is responsible for filing the SDLT return and paying the tax within 14 days of the effective date.
• Joint purchasers are jointly and severally liable, so any one of them may be responsible for the full amount.
• Special responsibility rules apply for companies, partnerships, trustees, and cases where a further return is required.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Guide to SDLT Liability: Responsibilities and Deadlines for Purchasers and Trustees

View all HMRC SDLT Guidance Pages Here