Understanding SDLT on Non-Cash Consideration in Property Exchanges with Examples

SDLT on Property Swaps and Other Non-Cash Consideration

Stamp Duty Land Tax can apply even where land is transferred for something other than cash, such as another property, rights over land, or lease arrangements. In exchanges, each party is treated separately, and the SDLT charge may be based on the market value of the interest acquired rather than simply what is paid or transferred away.

• Property exchanges usually create two separate land transactions, so each party’s SDLT position must be calculated on its own facts.
• If you receive a more valuable property than the one you give, SDLT may be charged on the market value of the property you acquire.
• If you transfer away more value than you receive, part of that transfer may be treated as a gift rather than consideration, using a just and reasonable apportionment.
• Where cash is added to balance an exchange, it can affect how the consideration is divided for SDLT purposes.
• In commercial deals, HMRC says a gift element is unlikely, but it may be relevant in family or other non-commercial arrangements.
• In more complex transactions, such as sale and leaseback structures, SDLT depends on the exact land interest acquired, its market value, and whether any relief applies.

Scroll down for the full analysis.

SDLT on property exchanges and other non-cash consideration

This page explains how SDLT can apply when land is acquired in exchange for something other than, or in addition to, cash. The common example is a property swap, but the same issue can arise where the buyer gives rights, leases, or other non-cash value. The key point is that SDLT does not look only at money paid. In some exchange cases, the tax charge is based on the market value of the property acquired if that is higher than the consideration given.

What this rule is about

Most people think of SDLT as a tax on the price paid for land. That is often right, but it is not the whole story. Where a transaction involves an exchange, or other non-cash consideration, the legislation has special rules for working out the chargeable consideration.

The practical problem is this: if two parties swap properties, or one party transfers land in return for some non-cash arrangement, there may be no straightforward purchase price. The SDLT rules therefore ask what each party has acquired, what each party has given, and whether any part of what is given is really a gift rather than consideration for the acquisition.

What the official source says

The official material gives three examples.

First, where two people exchange homes of very different values, each transaction is considered separately. The person acquiring the more valuable property pays SDLT on the market value of what they acquire if that is greater than what they give. The person acquiring the less valuable property does not automatically pay SDLT on the full value of what they transferred away. Instead, what they gave must be apportioned on a just and reasonable basis between:

• the part given in return for the property they receive, and
• any part that is really a gift.

In the official example, a grandmother transfers a £1 million house to her grandson in exchange for his £300,000 flat. The grandson pays SDLT on £1 million, being the market value of the house he acquires. The grandmother does not pay SDLT on £1 million. Her transfer of the house is apportioned so that £300,000 is treated as consideration for the flat and £700,000 is treated as a gift. She therefore pays SDLT on £300,000.

Second, where properties are exchanged and one party also pays cash to equalise the deal, the same principles apply. In the example, Ahmed’s home is worth £375,000 and Katrina’s is worth £400,000, so Ahmed pays £25,000 in cash as well. Ahmed pays SDLT on £400,000. Katrina’s transfer of her £400,000 house is apportioned on a just and reasonable basis between the property she receives (£375,000) and the cash she receives (£25,000). Her chargeable consideration for SDLT on her acquisition is therefore £375,000.

Third, the official material gives a more technical example involving a developer who sells a freehold subject to an obligation on the buyer to grant long leases back to the developer. HMRC’s view is that this is treated as the buyer acquiring an encumbered freehold. In the example, the freehold is so heavily burdened by the leaseback obligation that its market value is only nominal. The cash paid is also nominal. On those facts, there is no SDLT charge on the buyer because both the market value of the encumbered freehold and the consideration given are nominal. The developer’s leaseback is said to fall within sale and leaseback relief.

What this means in practice

The main practical point is that in an exchange there are usually two land transactions, not one. Each party’s SDLT position must be worked out separately.

You should not assume that SDLT follows the open market value of the property you transfer away. The question is more specific: what is the chargeable consideration for the property you are acquiring?

That can lead to results that surprise people:

• If you receive a more valuable property than the one you give, your SDLT charge may be based on the higher market value of what you acquire.
• If you give away property worth more than what you receive, not all of that value is necessarily consideration for SDLT. Part may be treated as a gift, if that is a just and reasonable analysis.
• If cash is added to balance values, that cash may affect how the transferor’s consideration is apportioned.

The source also makes an important practical observation: in transactions with a commercial flavour, there is unlikely to be any element of gift. In other words, the idea of splitting what is given between consideration and gift is most likely to matter in family or non-commercial arrangements.

How to analyse it

A sensible way to analyse an exchange transaction is to ask the following questions.

• What land interest is each party acquiring?
• What is the market value of that acquired interest?
• What is each party giving in return: land, cash, obligations, or some combination?
• Is any part of what is being given not really consideration for the acquisition, but instead a gift?
• If so, what is a just and reasonable apportionment?
• Are there any special relieving provisions, such as sale and leaseback relief, that alter the normal SDLT result?

In a straightforward property swap, each side should be tested separately. Do not stop after identifying the values of the two properties. You also need to consider whether either side is partly gratuitous.

In more structured transactions, especially those involving leasebacks or obligations to create rights over land, it is necessary to identify exactly what interest is acquired. The official example shows that the value of the acquired interest may be far lower than the unrestricted value of the land if the interest is heavily encumbered.

Example

Illustration: Parent A transfers a house worth £600,000 to Child B. In return, Child B transfers a flat worth £250,000 to Parent A. If the facts support the view that Parent A intended to benefit Child B to the extent of the difference, Parent A’s transfer may be apportioned so that £250,000 is consideration for the flat and £350,000 is a gift. On that basis, Child B’s SDLT position would be tested by reference to the £600,000 property acquired, while Parent A’s acquisition of the flat would be tested by reference to £250,000.

This is only an illustration of the approach shown in the official examples. The correct treatment depends on the actual facts and on whether a just and reasonable apportionment can properly be made.

Why this can be difficult in practice

The hardest issue is often deciding whether part of a transfer is truly a gift or whether the whole arrangement is simply an exchange at agreed values. That is a factual question.

The phrase just and reasonable apportionment is important, but it does not provide a mechanical formula for every case. In family transactions, there may be a genuine intention to confer value without receiving full equivalent value in return. In commercial transactions, HMRC’s published view is that a gift element is unlikely.

Another difficulty is identifying the correct asset being valued. The developer example shows that SDLT may be charged by reference to the value of an encumbered freehold, not the value of an unburdened freehold. That can make a dramatic difference. But whether a freehold is truly so heavily encumbered that its value is only nominal will depend on the legal and valuation facts.

The sale and leaseback example also sits within a wider SDLT framework. The absence of SDLT there does not arise simply because leases are granted back. It depends on the character of the transaction and the availability of the relevant relief.

Key takeaways

• In an exchange, each party’s SDLT position is worked out separately.
• Chargeable consideration may depend on the market value of the interest acquired, especially where that is greater than what is given.
• Where one side gives more than they receive, part of that transfer may be treated as a gift if a just and reasonable apportionment supports that conclusion.

This page was last updated on 24 March 2026

Useful article? You may find it helpful to read the original guidance here: Understanding SDLT on Non-Cash Consideration in Property Exchanges with Examples

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