Claiming an LTT refund when a future property payment falls away
LTT refunds after a future payment changes
You may be able to recover LTT where a future payment falls away or becomes lower, and that means you paid too much tax.
- Check whether the payment was contingent or uncertain when you bought the property.
- Keep evidence of the later event and its date.
- For a claim outside the amendment period, the deadline is the later of four years after filing and 12 months after the event.
Scroll down for the full analysis.
Read the original guidance here:
Claiming an LTT refund when a future property payment falls away
Claiming an LTT refund when a future property payment falls away
If a future payment falls away or proves lower after you paid Land Transaction Tax (LTT) on it, and that later event means the original calculation overstated tax, you may be able to get money back. That is the test. LTT replaced stamp duty land tax in Wales in 2018. The key is whether a later event means you paid more tax than was really due.
What this rule is about
Later events can alter property payments. A contract can require extra money only when planners grant permission. At the time of purchase, nobody knows the outcome.
The law still needs a figure for the first LTT return. Usually, it assumes payment will be made. The buyer uses a reasonable estimate for an amount they cannot yet work out.
Later, the picture may change. If that change reduces the LTT due, section 48 provides a route to a repayment.
What the official source says
WRA’s technical guidance explains repayments. Buyers can seek them after relevant events. Section 48 of the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017 is the legal rule that governs repayment where a relevant event, after the original return, leaves less LTT due than the buyer paid. It controls the claim.
- A contingent payment becomes due, or it becomes clear that it will not become due.
- An uncertain or unworked-out amount becomes known.
- The event must mean that less LTT is due for the purchase than the buyer has already paid.
- The rule can apply where the issue arose in a purchase linked to yours.
The buyer can amend the original return if the amendment period is still open. After that, they can make a repayment claim to WRA under the claims rules.
The deadline is important: the claim must be made by the later of two dates. Those dates are four years beginning with the day after the return filing date, and 12 months beginning with the relevant event.
What this means in practice
Hindsight alone does not create refunds. To qualify, you need a payment covered by these rules, a later event that affects it, and a resulting LTT calculation lower than the amount already paid. All three matter.
Do not assume the normal four-year period has ended the matter. A relevant event may give you a further 12 months. That extra period can be the point that saves the claim.
- Keep the original contract and the LTT return.
- Record the date when the future payment became known or fell away.
- Compare the LTT already paid with the amount due after that event.
- Check whether you can amend the return instead of making a separate claim.
How to analyse it
Start with the deal documents, not the label used for the payment. Calling something a deposit, adjustment or refund does not settle the tax result.
- Was part of the price dependent on an uncertain future event?
- Was the amount unknown when the property deal completed?
- What figure was used in the original LTT return?
- What later event changed the position, and on what date?
- Does that event reduce the LTT due rather than increase it?
- Is the return still within its amendment period?
- If not, is the claim within the later statutory deadline?
There is a different answer if the amount was always fixed and the parties later renegotiated it. The source does not say that every later price reduction creates a section 48 repayment.
Example
Ruth buys land for £100,000, with an extra £20,000 due only if planning permission is granted. Her first LTT calculation includes the extra £20,000 because it is a contingent payment. The authority later refuses planning permission, and the contract makes clear that Ruth owes no extra payment.
If that refusal means Ruth paid too much LTT, she may seek repayment. If she is outside the return amendment period, her claim deadline is the later of the normal four-year deadline and 12 months from the refusal.
Why this can be difficult in practice
The contract often creates the difficulty: you must prove what it required. A payment may look conditional, but the wording can show that the buyer already owed it or that another reason could change it.
Lease deals need particular care. Section 48 does not allow a claim for repayment of a loan or deposit treated as payment for granting or assigning a lease. It also blocks certain planned refunds that depend on the lease ending, being assigned, or an interest being granted out of it.
- Rent is outside this repayment rule and has separate lease rules.
- Payments treated as annuities are also outside this rule.
- A refund agreed from the start of a lease deal may be excluded.
- The date of the relevant event can decide whether a late claim is in time.
Key takeaways
- A later event can support an LTT refund if it reduces the tax due.
- Keep proof of both the original payment terms and the later event.
- The claim deadline may be later than four years after the return filing date.
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
- LTTA 2017 section 19 — how contingent amounts are valued initially
- LTTA 2017 section 20 — how uncertain amounts are estimated initially
- LTTA 2017 section 21 — treatment of long-term periodic annuity payments
- LTTA 2017 section 47 — events that trigger a further ltt return
- LTTA 2017 section 48 — repaying overpaid ltt after later events
- LTTA 2017 Schedule 6 para 19 — lease deposits treated as amounts paid
Official guidance
The pages below are the Welsh Revenue Authority’s guidance. Guidance is not law. It sets out how the Welsh Revenue Authority 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. the Welsh Revenue Authority can also change or withdraw guidance, and it may not cover your facts.
- Welsh Revenue Authority, Land Transaction Tax returns and payments technical guidance, LTTA/6080
Where this is not settled
- Whether a payment is truly contingent, uncertain or unascertained depends on the terms of the agreement and the facts.
- The supplied statutory library did not include the requested currency notice, so its recorded currency date could not be checked.
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 contract and any side agreements setting out the future payment.
- Proof of the event that fixed the amount or showed that it would not be paid.
- The original LTT return, filing date and payment record.
- For a lease, documents showing whether a deposit or refund falls within the special exclusion.
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 Land Transaction Tax (LTT), the tax on property in Wales. It replaced Stamp Duty Land Tax in Wales on 1 April 2018, and SDLT does not apply in Wales. MY QUESTION Claiming an LTT refund when a future property payment falls away [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 - LTTA 2017 section 19 - how contingent amounts are valued initially https://www.legislation.gov.uk/anaw/2017/1/section/19 - LTTA 2017 section 20 - how uncertain amounts are estimated initially https://www.legislation.gov.uk/anaw/2017/1/section/20 - LTTA 2017 section 21 - treatment of long-term periodic annuity payments https://www.legislation.gov.uk/anaw/2017/1/section/21 - LTTA 2017 section 47 - events that trigger a further ltt return https://www.legislation.gov.uk/anaw/2017/1/section/47 - LTTA 2017 section 48 - repaying overpaid ltt after later events https://www.legislation.gov.uk/anaw/2017/1/section/48 - LTTA 2017 Schedule 6 para 19 - lease deposits treated as amounts paid https://www.legislation.gov.uk/anaw/2017/1/schedule/6/paragraph/19 Guidance page from the Welsh Revenue Authority on this topic (guidance, not law): https://www.gov.wales/land-transaction-tax-returns-and-payments-technical-guidance#5556 HOW I WANT YOU TO ANSWER 1. Work from the legislation above. Read it before answering. Guidance from the Welsh Revenue Authority 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 payment is truly contingent, uncertain or unascertained depends on the terms of the agreement and the facts. - The supplied statutory library did not include the requested currency notice, so its recorded currency date could not be checked. Do not give me a conclusion you cannot support from the provisions above.
Legislation links show the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017 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 4 September 2026
Useful article? You may find it helpful to read the original guidance here: Claiming an LTT refund when a future property payment falls away
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