Stamp duty when you exchange land or property
Exchanging land and stamp duty
A land or property swap is usually treated as two separate SDLT transactions. Each side needs its own calculation.
- Do not focus only on cash paid
- Market value may drive the calculation
- Some residential exchanges have special rules
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty when you exchange land or property
If you swap land or property, stamp duty land tax can apply to both sides. It is not treated as one simple swap. The law treats each person as making a separate land deal.
What this rule is about
An exchange happens when each person receives something wholly or partly in return for land they give away. Cash may change hands too. That does not stop the deal being an exchange.
This matters because each side needs its own SDLT calculation. Looking only at the cash paid can give the wrong answer.
What the official source says
HMRC’s manual explains that, where land is exchanged and each party gives land under the same bargain, SDLT treats the arrangement as two separate transactions. That reflects the legislation. The law considers each side on its own, even though the deals form part of one bargain.
- One person receives land or property from the other.
- That person gives land or property in return, wholly or partly.
- The law treats each side as distinct and separate.
- The two sides are not treated as linked transactions for SDLT.
For exchanges involving a substantial ownership interest in land, the law generally uses the market value of what each person receives. It also compares that result with the amount that would apply without the exchange rule. The law selects the higher figure.
What this means in practice
Do not assume that a small cash balance means little or no stamp duty when the property or land received has a far higher value. Check its value.
- Work out the market value of each property or piece of land.
- Identify any cash, debt or other payment given alongside the swap.
- Calculate each side of the exchange separately.
- Check whether either party receives a lease with rent.
The official source also flags special rules and reliefs for some home exchanges. These can involve a house-building company, a property trader, or an employer helping with a move. They have their own conditions.
How to analyse it
Start by identifying what the agreement actually does, rather than relying on its label, because a deal labelled a sale can still be an exchange when each side gives land as part of the bargain. Read the terms.
- List every item each person gives and receives.
- Ask whether one land deal is payment for the other.
- Separate the two land transactions.
- Obtain supportable market values at the relevant time.
- Compare the statutory exchange value with the usual calculation.
- Check for a specialist residential-property rule or relief.
Example
Hugh transfers a plot worth £400,000 to Inez. In return, Inez transfers land worth £500,000 and Hugh pays her £100,000 in cash. This is not simply a £100,000 land purchase. For stamp duty purposes, the law looks separately at Hugh receiving Inez’s land and at Inez receiving Hugh’s plot, because each transfer forms one side of the bargain. Their respective land values are central to the calculation.
Why this can be difficult in practice
The hard part often lies in deciding what forms part of the bargain and obtaining reliable values for both sides. The maths is often not the issue.
- A contract may include cash, land, debt and other promises.
- Different completion dates can make the documents harder to read together.
- A low stated cash payment does not settle the SDLT value.
- Home-exchange reliefs depend on detailed facts and conditions.
HMRC’s manual is useful guidance, but it is not the law. The legislation decides the result.
Key takeaways
- A land swap normally creates two SDLT transactions.
- Market value can matter more than the cash balance.
- Check specialist rules where a home, developer, trader or employer is involved.
Technical analysis
For advisers, and for anyone who wants to check the law behind this page. You do not need this section to understand the guidance above.
Legislation
- FA 2003 section 47 — treating each side of an exchange separately
- FA 2003 Schedule 4 para 5 — working out the taxable value in exchanges
Official guidance
The pages below are HMRC’s guidance. Guidance is not law. It sets out how HMRC reads the legislation, and it is not binding on you, on a tribunal or on a court. Where guidance and the legislation differ, the legislation wins. HMRC can also change or withdraw guidance, and it may not cover your facts.
Where this is not settled
- Whether a transaction is truly an exchange depends on the agreements and on what each party gives and receives.
- The supplied material does not establish whether a residential-property relief applies in any individual case.
- Current-law verification is needed for a transaction after 17 November 2025.
Evidence you would need
This kind of case is decided on the facts of the individual property. These are the records that usually settle it, and the ones an adviser would ask you for.
- The signed contracts and transfer documents
- Details of every payment and item exchanged
- Valuations of the land or property each side receives
- Whether any property is a home and whether a specialist relief is claimed
- The transaction’s effective date
Explore this with an AI
Readers often want to test their own situation. Copy the prompt below into ChatGPT, Claude or Gemini. It hands the model the actual legislation for this page rather than letting it answer from memory, and tells it to be explicit about what is uncertain. What comes back is information, not advice – check it against the links above.
I am researching UK Stamp Duty Land Tax (SDLT), which applies in England and Northern Ireland. MY QUESTION Stamp duty when you exchange land or property [Replace this with your own situation: what you are buying, the price, the dates, who the buyer is, and what you plan to do with the property.] THE LAW THIS TURNS ON - FA 2003 section 47 - treating each side of an exchange separately https://www.legislation.gov.uk/ukpga/2003/14/section/47/2025-11-17 - FA 2003 Schedule 4 para 5 - working out the taxable value in exchanges https://www.legislation.gov.uk/ukpga/2003/14/schedule/4/paragraph/5/2025-11-17 Guidance page from HMRC on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm01410 HOW I WANT YOU TO ANSWER 1. Work from the legislation above. Read it before answering. Guidance from HMRC is its view of the law, not the law, and does not bind a tribunal or a court. 2. Tell me what the rule actually requires, in plain English. 3. Tell me which facts decide the answer, and which facts would change it. 4. Tell me what evidence I would need to support the position. 5. Be explicit about anything unsettled or fact-sensitive. Do not guess. 6. Your training data has a cutoff and SDLT rates and reliefs change at fiscal events. Say so if you are not sure the law is current. POINTS ALREADY KNOWN TO BE UNCERTAIN ON THIS TOPIC - Whether a transaction is truly an exchange depends on the agreements and on what each party gives and receives. - The supplied material does not establish whether a residential-property relief applies in any individual case. - Current-law verification is needed for a transaction after 17 November 2025. Do not give me a conclusion you cannot support from the provisions above.
Legislation links show Finance Act 2003 as it stood on 2025-11-17. The law may have changed since, and the rules that apply are those in force on the date of your transaction. The official guidance this page is based on is here.
This page was last updated on 31 August 2026
Useful article? You may find it helpful to read the original guidance here: Stamp duty when you exchange land or property
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