Deadline to File and Pay Land Transaction Tax

If you are buying a home in Wales, the Land Transaction Tax return and the tax itself are both due within 30 days of the effective date of the transaction, which is usually the day you complete¹. That single deadline covers filing and payment together: the organisation paying the return has 30 days after the effective date to submit and pay¹.

The clock is not the same across the UK. In England and Northern Ireland you must send the Stamp Duty Land Tax return and pay any tax within 14 days of the effective date². Scotland also uses 30 days for Land and Buildings Transaction Tax³. So a Welsh buyer has more than twice as long as an English one, but the deadline is still firm.

Land Transaction Tax replaced Stamp Duty Land Tax on residential and non-residential property and land interests in Wales from 1 April 2018, and it is collected by the Welsh Revenue Authority¹. Most buyers never handle the return themselves: their conveyancer does it as part of completion. The legal responsibility, though, sits with the buyer.

Land Transaction Tax deadline: 30 days to file and pay

The 30-day window is a combined filing and payment deadline, not two separate ones. When filing an LTT return, the organisation paying the return has 30 days after the effective date to submit and pay¹. The same 30-day rule appears in the Welsh Revenue Authority's own published statistics⁶.

Scotland's equivalent, Land and Buildings Transaction Tax, works the same way: a return must be made to Revenue Scotland within 30 days of the effective date of the transaction³. For a standard house purchase, the filing date is 30 days beginning with the day after the effective date⁷. The Additional Dwelling Supplement, Scotland's surcharge on second homes, follows the same 30-day return deadline where a transaction is notifiable⁸.

The practical effect is that the money has to be with the tax authority, not merely calculated, inside the window. Because the return is self-assessed, the buyer is responsible for its accuracy even when a solicitor submits it³. If something in the return turns out to be wrong, there is a period of 12 months following the return deadline in which it can be amended³.

When the 30 days start: the effective date

The effective date is usually the date the transfer completes, but it can also be the date the contract is "substantially performed"⁹. That second possibility matters: where a buyer takes possession or pays most of the price before completion, the clock can start earlier than the day they get the keys.

For most purchases the two dates are the same, and the deadline runs from completion. That is why the deadline is often described simply as 30 days from your completion date¹⁰. In Scotland, the filing date for a standard house purchase is 30 days beginning with the day after the effective date⁷.

Which purchases need a return: the £40,000 threshold

Taxpayers must notify the Welsh Revenue Authority of all land transactions with a value above £40,000¹. That is the notification threshold, and it is the trigger for a return. It is not a tax-free allowance: a purchase above £40,000 can need a return even where the calculation produces nothing to pay.

The same £40,000 figure appears across the UK's property taxes, which is a useful anchor. In England and Northern Ireland, a Stamp Duty Land Tax return is needed where the price or value of the property or land is £40,000 or more⁹. In Scotland, an LBTT return is required for most purchases of residential property where the chargeable consideration is £40,000 or more¹¹. Scotland's Additional Dwelling Supplement applies to purchases of all relevant residential properties for £40,000 and above¹².

Leasehold purchases are treated slightly differently, because what you pay for the lease is what counts⁹. Where a lease is bought, whether a return is needed depends on how much is paid for it.

Leases under 7 years that do not need a return

Short leases are the main exception to the return requirement. There are circumstances where certain lease transactions are not notifiable if they are less than 7 years in duration⁴. In England and Northern Ireland the equivalent rule is that you do not have to pay Stamp Duty Land Tax or tell HMRC if you buy a new or assigned lease of less than 7 years, as long as the chargeable consideration is less than the relevant residential or non-residential threshold¹⁴.

For new leases, a return is needed even where no tax is due, unless the lease is for 7 years or more with a premium under £40,000 and annual rent under £1,000, or is for less than 7 years with no tax on any part of the premium or rent¹⁵. If the lease is for less than 7 years and no tax is due, no return is needed¹⁵.

The 7-year line also appears in the higher rates rules, where a leasehold estate is not a "major interest" if its term does not exceed 7 years on the date of its grant¹⁶.

Claiming back higher rates: up to three years after you buy

If you pay the higher residential rates because you already owned a home, and you then sell your previous main residence, you have up to three years to sell and claim a refund⁴. The Welsh Revenue Authority publishes this as a three-year window, and it is the figure to work to.

The refund is of the higher-rate element only, not the whole bill. The claim depends on the sale actually happening, so the three years is a deadline for selling as well as for claiming. Keep the paperwork for both transactions.

England's equivalent rules are tighter and differently shaped. There, if you sell or give away your previous main home in the 3 years after you buy your new home, you can apply for a refund of the higher rate part of your Stamp Duty bill¹⁹. For properties sold on or after 29 October 2018, HMRC must receive the request by the later of 12 months after the date of sale or 12 months after the filing date of the return for the new main home²⁰. The legislation sets a 12-month window beginning with the effective date of the disposal, with a longer permitted period possible in exceptional circumstances¹⁶.

Filing and paying with the Welsh Revenue Authority

Land Transaction Tax is collected by the Welsh Revenue Authority, which is also the data provider for the published LTT statistics¹. The return is filed with the WRA, and the tax is paid to it, within the 30-day window¹.

In practice the conveyancer handles this. In Scotland, solicitors pay any required Land and Buildings Transaction Tax on the buyer's behalf as part of the purchase²¹. Welsh conveyancers work in the same way, which is why most buyers never see the return. The duty remains the buyer's: property transaction tax is self-assessed, and it is the taxpayer's responsibility to complete and submit an accurate return and pay any tax due³.

If the conveyancer fails to file or pay, the consequences fall on the buyer, not the firm. That is the reason to ask for confirmation that the return has been submitted and the tax paid, rather than assuming completion closed the matter.

Do I have to file a return if no Land Transaction Tax is due?

Often yes. The return is the notification, and notification is required for transactions above £40,000 regardless of whether tax results¹. The £40,000 figure is a threshold for telling the WRA about the transaction, not a threshold for owing tax.

There are genuine exceptions. Certain lease transactions under 7 years are not notifiable⁴. In England, no return is needed where no money or other payment was made⁹. The pattern is that a return is required unless a specific exclusion applies, not the other way round.

Where a return has been filed and something needs correcting, there is a 12-month amendment period following the return deadline³. In England, a refund claim can be made within one year of the filing date for the SDLT return, and HMRC has up to 9 months to make a compliance check on an amended return or claim¹⁹.

Do first-time buyers in Wales get relief from Land Transaction Tax?

No. First-time buyer relief applied under the predecessor tax but not to Land Transaction Tax¹³, and Wales does not have a first-time buyer relief⁵. That is a clear difference from England, where first-time buyer relief exists.

A first-time buyer in Wales therefore pays under the same rules as any other buyer. The starting threshold for the main residential rates still means many lower-priced purchases attract nothing, but there is no separate relief that switches the charge off for a first purchase.

The Help to Buy - Wales scheme does not change this. The Welsh Government's standard rules and procedures for Land Transaction Tax apply to the scheme, and the tax is payable at the time of purchase based on the full purchase price of the home²². So a shared equity buyer under that scheme still faces the same LTT calculation and the same 30-day deadline.

Do non-UK residents pay a surcharge on Land Transaction Tax?

The 2% surcharge for non-UK residents is a Stamp Duty Land Tax rule, so it applies to purchases in England and Northern Ireland rather than to Land Transaction Tax in Wales¹⁹. You are usually treated as non-UK resident for Stamp Duty if you have spent less than 183 days in the UK in the 12 months before you buy²³.

There is a separate reporting duty that catches non-residents wherever they buy. If you are non-UK resident and sell a UK home, you must tell HMRC within 60 days of transferring ownership, even if there is no tax to pay²⁴.

For a buyer with links to both nations, the two systems can apply to different parts of the same plan. Land Transaction Tax applies when buying a second home in Wales²⁵, while the non-resident surcharge sits in the English system. The deadlines also differ: 30 days in Wales, 14 days in England¹.

What happens if I buy property in both Wales and England in one transaction?

A single transaction spanning the border can involve two taxes and two returns. Land Transaction Tax applies to land in Wales, and Stamp Duty Land Tax applies to land in England and Northern Ireland⁹. Each has its own deadline: 30 days for the Welsh return, 14 days for the English one¹.

That means two filing dates, two calculations and potentially two sets of higher-rate rules. The Welsh higher-rate refund window is up to three years⁴, while the English claim window runs to the later of 12 months after the sale or 12 months after the filing date of the return for the new main home²⁰. A buyer moving across the border with an existing home can therefore be working to two different clocks at once.

How the transaction is structured affects which tax applies to which part, so this is a point to settle before exchange rather than after completion.

Where to get help

The Welsh Revenue Authority collects Land Transaction Tax and publishes the statistics behind these figures¹. For free, impartial guidance on buying a home and on property taxes, MoneyHelper and the tax authority websites are the starting points. If a return has been filed late or incorrectly, the amendment rules give a 12-month window from the return deadline in the LBTT system³, and the English refund rules give their own windows¹⁹.

For the wider process, see Stamp Duty Land Tax in England and Northern Ireland, Land Transaction Tax in Wales and Buying a home in Wales. If a conveyancer has failed to pay the tax, what to do if your conveyancer fails to pay property tax sets out the position.