Guide to Assignments of Rights in Pre-Completion Land Transactions

SDLT on Assignments of Rights Before Completion

When a buyer under a land contract passes their rights to someone else before completion, SDLT is worked out under special pre-completion rules. The final buyer is usually taxed by combining what they pay under the original contract with what they pay for the assignment, and the original assignor may also face a separate notional SDLT transaction.

• The final buyer, known as the transferee, is generally treated as buying from the original seller rather than from the person assigning the contract.
• For SDLT, the transferee’s chargeable consideration broadly includes both the price payable under the original contract and any amount paid for the assignment of rights.
• The person assigning the rights, and sometimes others in a chain of assignments, may also be treated as having separate notional land transactions for SDLT purposes.
• If the original contract was substantially performed and later rescinded or annulled, special rules can alter the SDLT treatment.
• If only part of the land is assigned, the original contract is treated as if split into separate contracts so the assigned part can be taxed separately.

Scroll down for the full analysis.

SDLT and assignments of rights before completion

This page explains how SDLT works where someone who has agreed to buy land under a contract does not complete that purchase themselves, but instead passes their contractual rights to someone else before completion. These are called pre-completion transactions and, in this part of the legislation, assignments of rights. The rules matter because SDLT may be charged by looking through the chain of contracts and assignments, rather than simply taxing the final transfer in the usual way.

What this rule is about

The source material deals with paragraphs 4 to 8 of Schedule 2A to Finance Act 2003. These provisions apply where there is an original contract for land, and before completion the buyer under that contract assigns their rights to another person.

In simple terms, the law asks two separate questions:

• How is the final buyer, called the transferee, taxed?
• Is there also a separate SDLT charge on the person who assigned their rights, called the transferor, or on others in a chain of assignments?

These rules are designed to deal with situations where contractual rights are traded on before the land is actually conveyed. Without special rules, it might be unclear who is treated as buying the land, from whom, and for what consideration.

What the official source says

The official material says that paragraph 4 sets out how the transferee is treated. Broadly, the chargeable consideration for the transferee’s acquisition is:

• what the transferee gives under the original contract, plus
• what the transferee gives for the assignment of rights.

It also says that, in general, the seller for the transferee’s acquisition is the original seller under the original contract, although paragraph 8 contains exceptions to that general position.

Paragraph 5 creates a separate notional land transaction for the transferor under an assignment of rights. If there are successive assignments, each later transferor may also have a notional additional land transaction. Broadly, the consideration for these notional transactions includes consideration given under the original contract by either the transferor or the transferee. In the case of an additional land transaction, consideration given for the preceding assignment is also taken into account.

The source also explains that if the original contract has been substantially performed but is later rescinded or annulled, the transferee is dealt with under the normal rule in section 44(9). Paragraph 6 makes similar provision for the notional transactions created by paragraph 5.

Finally, where the assignment of rights relates to only part of the land under the original contract, paragraph 7 says the legislation works as if the original contract had been split into two contracts: one for the assigned land and one for the remaining land.

What this means in practice

The practical effect is that SDLT is not worked out only by looking at the final transfer deed. Instead, the legislation reconstructs what has happened economically.

If A contracts to buy land from V, and before completion A assigns the benefit of that contract to B, B is generally treated as acquiring from V, not from A. But the amount B pays for SDLT purposes is not limited to the amount B pays to V. It also includes what B pays A for the assignment.

That matters because the final buyer cannot usually reduce SDLT simply by splitting value between:

• the original purchase price payable under the original contract, and
• a separate payment for the assignment of rights.

At the same time, the assignor may not simply disappear from the SDLT picture. Paragraph 5 can create a separate notional land transaction for that person. If there is a chain of assignments, the legislation may create further notional transactions for later assignors as well.

So, in an assignment structure, there may be more than one SDLT-relevant transaction to consider:

• the transferee’s deemed acquisition, and
• one or more notional transactions for assignors in the chain.

This is a technical area. The source gives only the broad outline, but the key point is that the legislation is intended to bring into charge the consideration moving through both the original contract and the assignment arrangements.

How to analyse it

A sensible way to analyse an assignment of rights is to ask the following questions.

• Is there an original land contract that has not yet completed?
• Has the buyer under that contract assigned their contractual rights before completion?
• Who is the final transferee?
• What does the transferee give under the original contract?
• What does the transferee give for the assignment itself?
• Is the seller for SDLT purposes still the original seller, or does paragraph 8 alter that result?
• Does paragraph 5 create a notional land transaction for the assignor?
• If there were multiple assignments, are there additional notional land transactions in the chain?
• Has the original contract been substantially performed and then later rescinded or annulled, so that section 44(9) and paragraph 6 need to be considered?
• Does the assignment cover all of the land, or only part of it?

That last question is important. If only part of the land is assigned, the legislation treats the original contract as if it had been divided into two separate contracts. This allows the SDLT analysis to be applied to the assigned part separately from the remainder.

Example

Illustration: V agrees to sell a site to A under an original contract. Before completion, A assigns its rights under that contract to B. Under the arrangements, B pays part of the overall value to V under the original contract and also pays A for taking over the contract.

Under paragraph 4, B’s chargeable consideration is broadly the total of both elements: what B gives under the original contract and what B gives for the assignment. For SDLT purposes, B is generally treated as acquiring from V, the original seller.

Paragraph 5 may also create a notional land transaction for A as transferor. If A had itself acquired the rights by assignment from someone else before assigning them to B, there could also be an additional notional land transaction for the earlier link in the chain.

If A assigned only part of the site to B and kept the rest, the legislation would treat the original contract as if it had been split into two contracts, so the assigned part could be analysed separately.

Why this can be difficult in practice

These rules are difficult because the legal paperwork and the SDLT analysis do not always line up neatly.

First, the person who appears to be selling the rights under the assignment is not necessarily treated as the seller for the transferee’s SDLT transaction. The legislation generally points back to the original seller, subject to exceptions.

Second, the consideration can be spread across different documents and paid to different people. You need to identify everything the transferee gives under the original contract and everything given for the assignment. Missing one element may understate the chargeable consideration.

Third, where there are several assignments in sequence, the legislation can create multiple notional transactions. That means it is not enough to look only at the final assignment into the ultimate buyer.

Fourth, substantial performance followed by rescission or annulment can change the analysis. The source indicates that the normal section 44(9) rule applies to the transferee, with similar treatment for notional transactions under paragraph 6. That means timing and later events can matter.

Finally, partial assignments add another layer of complexity because the original contract must effectively be split for SDLT purposes. Working out how much consideration relates to each part may be straightforward in some cases and much less so in others.

Key takeaways

• Where rights under a land contract are assigned before completion, the final buyer’s SDLT charge is based broadly on both the original contract consideration and the price paid for the assignment.
• The final buyer is generally treated as acquiring from the original seller, but the assignor may also have a separate notional land transaction for SDLT purposes.
• If there are multiple assignments, later rescission after substantial performance, or only part of the land is assigned, the analysis becomes more technical and must be done carefully.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Guide to Assignments of Rights in Pre-Completion Land Transactions

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