Welsh Land Transaction Tax: Replacing Your Main Home While Keeping a Buy‑to‑Let
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Do you pay higher rates of Welsh LTT when replacing your main home but keeping a buy-to-let?
Introduction
People often search for this issue when they are moving home to Wales, already own a rental property, and are unsure whether the higher residential rates of Land Transaction Tax (LTT) will apply. The confusion usually arises because owning more than one dwelling can trigger higher rates, but there is an important exception where the purchase is a genuine replacement of a main residence.
This article explains how the rules work where a homeowner sells their current home, buys a new home in Wales, and keeps a separate long-held rental property.
The Question
A couple are selling their current main residence in England and buying a new home in Wales which will become their only home to live in. They also own a separate property which has been let to tenants for many years and has never been used as their own residence.
They want to know whether the higher rates of LTT apply to the Welsh purchase simply because they will still own the rental property after completion.
Nick’s Explanation
Nick’s view was that the higher rates should not apply on these facts.
In anonymised form, his reasoning was:
“Under Schedule 5, paragraph 8 of the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, the higher rates do not apply where the buyer is purchasing a new main residence and has sold the previous main residence on or before the effective date of the new purchase.”
He also explained that where the other property is simply a longstanding buy-to-let and has never been the buyer’s main residence, that does not by itself prevent the replacement of main residence exception from applying.
Put shortly, if the old home is sold and the new Welsh property is bought as the new main residence, the fact that a separate rental property is retained does not automatically mean higher rates are due.
The Law
The relevant tax here is not SDLT. A purchase of residential property in Wales is generally subject to LTT under the Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017.
The higher residential rates are found in Schedule 5 to that Act. Broadly, higher rates can apply where, at the end of the day of the transaction, the buyer owns more than one dwelling and the purchased dwelling is not subject to an exception.
One of the key exceptions is the replacement of a main residence rule in Schedule 5, paragraph 8. In broad terms, the exception can apply where:
- the purchased dwelling is intended to be the buyer’s only or main residence;
- the buyer has disposed of a previous only or main residence; and
- that disposal takes place on or before the effective date of the new purchase.
If those conditions are met, the higher rates do not apply, even if the buyer still owns another dwelling such as a rental property.
Analysis
The analysis is usually straightforward if the facts are clear.
Identify the tax regime.
Because the new property is in Wales, the relevant tax is LTT, not SDLT.
Ask whether the buyers will own more than one dwelling at the end of the day.
Yes. After the purchase, they will own the new Welsh home and still own the separate rental property.
Consider whether that would normally point to higher rates.
Yes. Without an exception, owning more than one dwelling at the end of the transaction would commonly bring the purchase within the higher rates rules.
Check whether the purchase is a replacement of a main residence.
If the buyers are selling the home they actually live in and that sale completes on or before the effective date of the Welsh purchase, this is the key condition for the exception.
Consider the status of the retained property.
The retained property is a buy-to-let that has never been their main residence. That matters because it means the retained property is not the residence being replaced. The residence being replaced is the home they are selling.
Apply the exception.
If the old main residence is sold in time and the new Welsh property is the new main residence, Schedule 5, paragraph 8 should disapply the higher rates.
On those facts, the retained rental property does not defeat the replacement of main residence exception.
The common misunderstanding is to assume that any ownership of another property always causes higher rates to apply. That is not correct. The legislation specifically allows for the replacement of a main residence even where another property is still owned.
Outcome
Where buyers sell their existing main residence on or before completion of the Welsh purchase, and the new Welsh property becomes their new main residence, the higher rates of LTT should not apply merely because they also keep a separate buy-to-let property.
In that situation, this is generally a replacement of main residence case, not an additional dwelling surcharge case.
The refund point that often applies in delayed-sale cases is different. If the previous main residence has not yet been sold by completion, higher rates may be payable first, with a possible reclaim later if the old main residence is sold within the statutory period. But where the old main residence is already sold on or before completion, the better view is that the higher rates should not be charged in the first place.
Practical Steps
To assess your own position, work through the following:
- Confirm that the property being sold is genuinely your only or main residence.
- Confirm that the Welsh property is intended to become your new only or main residence.
- Check the completion dates carefully. The sale of the old main residence should complete on or before the effective date of the purchase if you want the replacement exception to apply immediately.
- Make sure your conveyancer understands that the transaction is in Wales and therefore falls under LTT rather than SDLT.
- Tell your conveyancer about all other properties you own, but also make clear whether any of them have ever been your main residence.
- Ask for the LTT return to be prepared on the basis of the replacement of main residence exception if the facts support it.
A simple way to frame the point to a conveyancer is this: the old main residence is being sold on or before completion, the new Welsh property is the new main residence, and the only other retained property is a separate buy-to-let that has never been the buyers’ residence.
Conclusion
If you are buying a home in Wales to replace your current home, and you sell your current main residence on or before completion, you will not usually pay the higher rates of LTT just because you also own a separate rental property. The key issue is whether the purchase is truly a replacement of your main residence under Schedule 5, paragraph 8 of the 2017 Act.
Legal References Used
- Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017
- Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, Schedule 5
- Land Transaction Tax and Anti-avoidance of Devolved Taxes (Wales) Act 2017, Schedule 5, paragraph 8
This page was last updated on 22 March 2026.
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