Stamp duty examples: selling your old home in time
In short
The higher SDLT rates depend on more than the number of properties you own. When people buy together, each buyer’s facts matter.
- Married couples may be treated differently from unmarried couples.
- A sale of a buy-to-let does not replace a former main home.
- Ownership shares and completion dates can change the result.
Scroll down for the full analysis.
Read the original guidance here:
Stamp duty examples: selling your old home in time
Buying a new home while keeping another property can mean higher stamp duty. But ownership numbers alone do not decide it.
The key question is often whether you are replacing the home you live in, and whether each joint buyer passes that test.
What this rule is about
The higher SDLT rates can apply when you buy a home and still own another residential property at the end of completion day. SDLT means Stamp Duty Land Tax.
This page explains HMRC’s further examples on the rule about replacing your main home.
The rule matters most when people move house before a sale completes, but it can also matter when one partner owns a rental property, someone buys a share from a co-owner, or a home is joined to the house next door.
Labels do not decide the answer.
Start with the facts: who owns it, what share they own, where they lived, and what happened on completion day.
What the official source says
HMRC’s manual says that joint buyers are tested separately. If the higher-rates test works for one buyer, it can apply to the whole joint purchase.
A buyer replacing their main home may avoid the higher rates. Another joint buyer may not.
- A married couple who lived together in the home being sold can be treated as replacing their main home, even if only one spouse owned that old home.
- An unmarried couple do not get that treatment merely because both lived in one partner’s home.
- Keeping a current main home and selling a buy-to-let instead does not amount to replacing a main home.
- Someone who sold their main home, then lived temporarily in a rental property, may still be replacing that earlier home.
- A flat above a rented shop can count as another residential property for this test.
- A share in a jointly owned home can count as an interest in another property.
The legislation sets the legal test. For one-home purchases, it includes the amount paid, the type of interest bought, other homes owned at the end of the relevant day, and whether the purchase replaces the buyer’s only or main residence.
HMRC’s examples show its view of how those rules work. They help, but they are not law.
Schedule 4ZA to the Finance Act 2003 decides the outcome.
What this means in practice
Marriage can make a real difference. Say a husband owns a rental flat and his wife owns the home where they both live.
They sell her home and buy their next home together, while keeping the rental flat.
HMRC says the husband can be treated as replacing the old main home because his spouse owned it and they lived there together. On those facts, the higher rates do not apply to their joint purchase.
Change one fact. The result changes.
If the couple were not married or civil partners, the partner who owned the rental flat would not be treated as having sold the other partner’s home. HMRC says the higher rates apply in that version.
- Check every buyer’s position, not just the person selling the old home.
- Check what each buyer owns at the end of completion day.
- Record whether the old home was owned by the buyer or their spouse or civil partner.
- Check whether spouses or civil partners were living together at the relevant time.
- Separate a main home from a rental property in your timeline.
- Do not assume that selling any property later will undo the higher rates.
This is the part people get wrong: selling a buy-to-let is not the same as selling your old main home. HMRC’s examples say that a refund is only available where a previous main home has been replaced.
For example, a person who keeps their present home, rents it out, and sells a buy-to-let after buying another home has not replaced their former main home.
The buy-to-let sale produces no refund on those facts.
How to analyse it
Work through the position in a fixed order. A clear timeline often helps more than a long explanation.
Put the old-home sale, the new-home purchase, and any move into temporary accommodation on it.
- List everyone buying the new home.
- For each buyer, list every residential property and share they own.
- Identify the position at the end of the day the new purchase completes.
- Mark the home each buyer actually used as their main home.
- Identify any former main home that was sold.
- Check whether the buyer, or a spouse or civil partner, owned that former home.
- Check whether the couple were living together where that matters.
- Ask whether either buyer bought another intended main home between the old sale and new purchase.
- Check whether a special rule applies when someone is increasing an existing share in their own main home.
- Keep the documents that support the timeline and ownership position.
What if you lived in a property but never owned it? For an unmarried partner, that fact alone does not make it their former main home for this test.
HMRC’s example of Mr P and Ms B makes that point directly.
What if you sold your main home months ago? That does not automatically prevent replacement treatment.
HMRC gives the example of Ms G, who sold her main home six months earlier and temporarily moved into one of her rental properties while looking for a new home.
On the facts given, HMRC says the temporary stay does not prevent her from being treated as replacing the old main home. The old property must have been her only or main residence at some time in the relevant three-year period.
Example
Here is an illustration based on HMRC’s examples. Aisha and Ben are not married.
Ben owns a rental flat. Aisha owns the house where they both live.
They sell Aisha’s house and buy a new home together for £450,000. Ben keeps his rental flat.
Aisha is replacing her main home. Ben is not, because he had no share in the house Aisha sold and they are not spouses or civil partners.
Since Ben still owns the rental flat, HMRC says the joint purchase is a higher-rates transaction.
Now change one fact: Aisha and Ben are married and were living together in Aisha’s old house. HMRC’s equivalent example says Ben can be treated as replacing the old main home too.
On those stated facts, the higher rates do not apply.
The £450,000 figure does not decide the point. It simply shows that ownership facts can change the stamp duty result even where the purchase price stays the same.
Why this can be difficult in practice
Property ownership is often less simple than it looks. A person may own a small share with friends, own a flat above business premises, or take over a mortgage as part of a transfer between spouses.
HMRC’s examples also show why old online material can confuse matters. Some outcomes changed for purchases on and after 22 November 2017.
The manual contrasts those historic rules with later exceptions.
- Buying a further share in your own main home can fall within a specific exception.
- That exception requires the home to have been your main home throughout the stated three-year period.
- A short lease or a very small share can affect whether that exception is available.
- A transfer of a share between spouses or civil partners can have its own exception.
- Buying the house next door to merge with your home does not, in HMRC’s example, count as replacing the old home.
- Keeping the original home in an altered form does not meet the example’s refund condition.
- A rented flat above a shop should not be ignored simply because the wider property is mixed use.
One practical difficulty is proving where you lived. Council tax records, bills and correspondence may help, but the full facts still matter.
A temporary stay elsewhere does not always break the link with a former main home.
Timing is another difficulty. The law tests ownership at the end of the relevant day.
A sale completing one day later can therefore change the answer, even if the gap is very short.
Key takeaways
- For joint buyers, one person’s position can bring the higher rates into play.
- Marriage or civil partnership can matter where only one partner owned the old home.
- Selling a rental property does not normally count as replacing your main home.
- Shares, mixed-use property and transfers between spouses need careful checks.
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 Schedule 4ZA para 2 — how joint buyers are tested separately
- FA 2003 Schedule 4ZA para 3 — conditions for higher rates on one home
- FA 2003 Schedule 4ZA para 7A — exception when increasing an interest in your home
- FA 2003 Schedule 4ZA para 9A — exception for transfers between spouses or civil partners
- FA 2003 section 116 — what counts as residential property
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
- The manual examples cannot settle every question about whether someone genuinely lived in a property as their main home.
- A mixed shop and flat arrangement may need closer analysis if the flat is not clearly residential property.
- The correct result can depend on the exact completion date and each buyer’s ownership at the end of that day.
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.
- completion dates for the old and new homes
- details of every property interest each buyer holds
- evidence of where each buyer actually lived
- sale documents for any former main home
- marriage or civil partnership status and whether the couple lived together
- documents showing the value and shares of jointly owned property
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 examples: selling your old home in time [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 Schedule 4ZA para 2 - how joint buyers are tested separately https://www.legislation.gov.uk/ukpga/2003/14/schedule/4ZA/paragraph/2/2025-11-17 - FA 2003 Schedule 4ZA para 3 - conditions for higher rates on one home https://www.legislation.gov.uk/ukpga/2003/14/schedule/4ZA/paragraph/3/2025-11-17 - FA 2003 Schedule 4ZA para 7A - exception when increasing an interest in your home https://www.legislation.gov.uk/ukpga/2003/14/schedule/4ZA/paragraph/7A/2025-11-17 - FA 2003 Schedule 4ZA para 9A - exception for transfers between spouses or civil partners https://www.legislation.gov.uk/ukpga/2003/14/schedule/4ZA/paragraph/9A/2025-11-17 - FA 2003 section 116 - what counts as residential property https://www.legislation.gov.uk/ukpga/2003/14/section/116/2025-11-17 Guidance page from HMRC on this topic (guidance, not law): https://www.gov.uk/hmrc-internal-manuals/stamp-duty-land-tax-manual/sdltm09810 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 - The manual examples cannot settle every question about whether someone genuinely lived in a property as their main home. - A mixed shop and flat arrangement may need closer analysis if the flat is not clearly residential property. - The correct result can depend on the exact completion date and each buyer's ownership at the end of that day. 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 examples: selling your old home in time
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