How long do I have to amend an LBTT return?

Land and Buildings Transaction Tax (LBTT) is the Scottish tax on land and building transactions, and it is self-assessed: the taxpayer has to complete and submit an accurate return and pay any tax due¹. If something on that return turns out to be wrong, you have 12 months from the filing date to amend it². The same 12-month window appears in the legislation behind the tax, which allows a return to be amended "in the period of 12 months following the deadline for making the return"³.

The clock does not start when you notice the mistake. It starts from the filing date, which is the date by which the return had to be made². For most LBTT returns that means 30 days from the effective date of the transaction, so in practice the amendment window usually closes around 13 months after completion⁴.

Miss the 12 months and the position is firm: Revenue Scotland says it will reject any request for an amendment received after the amendment period has expired². If the change would have reduced your tax, that rejection can mean paying more than you needed to.

The amendment window: 12 months after the filing date

The rule is set out in section 83 of the Revenue Scotland and Tax Powers Act 2014, and Revenue Scotland's guidance states plainly that "amendments are allowed within 12 months of the filing date"². The legislation uses slightly different words for the same idea, describing a period of 12 months following the deadline for making the return³. Revenue Scotland's own statistics publication puts it a third way, saying amendments and corrections can be made to LBTT returns up to one year following the filing date⁴. All three describe one window.

The filing date is not the date you happened to send the return. It is defined as "the date by which that return requires to be made by or under any enactment"². So the window is measured from the legal deadline, not from your own filing. If you filed early, you do not gain extra time; if you filed late, you do not lose any, though a late return brings its own penalties.

This is a narrower window than some other tax amendments. For Self Assessment, you can amend a return for up to 12 months after the original deadline, which for a 31 January filing date means the following 31 January⁶. The structure is similar, but the LBTT clock is tied to a 30-day deadline rather than an annual one, so it runs out much sooner after the event.

How the filing date sets the clock: the 30-day return deadline

For LBTT, taxpayers have 30 days from the effective date to submit their return⁴. The Additional Dwelling Supplement guidance repeats the same deadline: if a transaction is notifiable, a return must be made to Revenue Scotland within 30 days of the effective date⁷. The equivalent Welsh deadline for Land Transaction Tax is also 30 days after the effective date to submit and pay⁸.

Put the two rules together and the practical shape of the window becomes clear. The return is due 30 days after the effective date. The filing date is the date by which the return had to be made. The amendment window then runs 12 months from that filing date. For a transaction completed on, say, 1 June, the return is due by 1 July, and the amendment window closes around 1 July the following year.

Two things follow from this. First, the deadline is the same whether or not you have anything to change, so there is no separate notification to make. Second, because the window is measured from a fixed legal date rather than from when you filed, a conveyancer who files on the last day does not extend it, and one who files a week early does not shorten it.

Not every transaction needs a return at all. Notification is not required where the consideration for the transaction falls below a threshold of £40,000³. If no return was required, there is nothing to amend, though a return may still be needed if the transaction is notifiable for another reason.

After 12 months, amendment requests are rejected

Revenue Scotland's position on late amendments is unambiguous: "We will reject any requests for amendments received after the expiry of this 12 month amendment period"². There is no discretion described in the guidance, and no equivalent of the late appeal rules that apply elsewhere in the tax system, where a tribunal can sometimes accept a late appeal made within 13 months¹⁰.

That matters most where the amendment would have reduced the tax. A relief claimed too late is a relief lost, and the money is not recoverable through the amendment route. The Additional Dwelling Supplement guidance points to a second, separate route for overpayments: a repayment claim under section 107 of the Revenue Scotland and Tax Powers Act 2014, which can be made within 5 years of the tax return due date⁷. That is a claim for money already paid, not an amendment to the return, and it is worth knowing the two exist side by side.

Can I amend an LBTT return to claim a relief I forgot?

Yes, provided you are still inside the 12 months. First-Time Buyer Relief must be claimed in the first LBTT return made for the transaction, or in an amendment to that return¹¹. Multiple Dwellings Relief follows the same pattern: it is claimed in the original LBTT return or by amending the return to claim it¹². Neither relief has a separate, longer claim period.

First-Time Buyer Relief has been part of the Scottish system since the end of the tax holiday. The Scottish Government's review records the reversion to standard rates on 1 April 2021, which restored the relevance of the relief¹³. The Scottish Budget set out an increase in the residential nil rate band from £145,000 to £175,000 for first-time buyers, and noted that almost 105,000 first-time buyers had benefited from the relief by the end of November 2025, saving up to £600 of tax¹⁴.

There is one further wrinkle worth knowing. Where First-Time Buyer Relief is withdrawn, the taxpayer must make a further LBTT return to Revenue Scotland rather than simply amending the original¹¹. That is a fresh return, not an amendment, and it sits outside the 12-month amendment rule.

If you are buying in Scotland and want the wider picture on rates, bands and reliefs, the Land and Buildings Transaction Tax page covers them, and the Additional Dwelling Supplement page deals with the second-home charge.

Getting a refund when an amendment reduces the tax

Where an amendment reduces the tax due, the result is a repayment. Revenue Scotland says it aims to process any repayment claims within 10 working days². For the Additional Dwelling Supplement specifically, it says it aims to process the repayment claim within 10 working days and will repay the ADS to you with interest⁷. The 10 working day figure is described as an aim.

Small overpayments are handled differently. Revenue Scotland says every effort will be made to refund overpayments where the amount is £100 or greater, but where the overpayment is less than £100 and it does not hold repayment details, the refund will only be made on request⁵. In other words, a small overpayment may sit unrefunded unless you ask for it.

The wider principle that a reduced bill leads to a repayment is standard across the tax system. HMRC's guidance on Self Assessment says that if a change means you need to pay less tax, HMRC will process a repayment on request⁶. The Scottish route is a claim to Revenue Scotland rather than to HMRC, but the shape is the same.

For comparison, the equivalent English and Northern Irish process for Stamp Duty Land Tax is to apply for a refund by amending the SDLT return, and the postal claim deadline is within one year of the filing date for the return¹⁵. Wales operates its own refund statistics for Land Transaction Tax, rounded to the nearest 10 for the transactions for which a refund applies and to the nearest £0.1 million for the aggregate value of refunds⁸. A partial Land Transaction Tax refund for a purchase-before-sale transaction can be claimed within 3 years following the purchase of the new home¹⁶.

How do I pay extra LBTT after amending my return?

If the amendment increases the tax due, the extra amount is payable to Revenue Scotland. The full 13 character reference, and only that reference, must be quoted when making payments in relation to the transaction or contacting Revenue Scotland about it⁵. That reference is the one on the original return.

Interest runs on the additional tax. Revenue Scotland's guidance says you will also have to separately pay interest on the additional amount of tax payable, charged from the filing date of the return until the date the additional amount is paid². Note the start point: interest is not charged from the date of the amendment but from the filing date, so the longer the gap between filing and amending, the more interest has built up.

Penalties are a separate matter and depend on whether the return or the tax was late in the first place. Revenue Scotland warns that you may be charged penalties and interest if you do not submit or pay your tax return on time¹⁷. Where a penalty notice has been issued, the recipient has 30 days from the date of the notice to pay or appeal it, and if the penalty is paid late, interest is chargeable and a further penalty may become payable¹⁸.

The late filing penalties themselves escalate. Where a return has not been received for more than 6 months, the penalty is an extra £300 or 5 per cent of any unpaid tax, whichever is greater; where it has not been received for more than 12 months, it is another £300 or 5 per cent of any unpaid tax, whichever is greater¹⁹. Both figures come from official guidance and the disagreement is unresolved, so treat the trigger point as uncertain.

Amending a paper return, and who is responsible

Most LBTT returns are filed online, but where a return was originally made in paper format, or the online return cannot be accessed, it can be amended by email to LBTT@revenue.scot quoting the return reference number, each field to amend, the current entry and the new entry². That is a specific format, and leaving out the current entry or the new entry will slow the amendment down.

Responsibility for the return sits with the buyer. The legislation states that the buyer is liable to pay the LBTT due in respect of a chargeable transaction³. Revenue Scotland's guidance on chargeable consideration goes further: LBTT is due on the total chargeable consideration of a land transaction and the buyer is ultimately responsible to pay that amount, even where someone else pays or a grant covers part of the purchase price²⁰. If you bought jointly, the return is a joint return and the liability sits with the buyers, so an amendment is not something one joint owner can do alone without the other's agreement in practice.

LBTT applies to residential and commercial land and building transactions, including commercial properties and commercial leases, where a chargeable interest is acquired¹. The rate for each band is applied only to the part of the price over the relevant threshold and up to the next threshold, and there is no LBTT to pay if the property is bought for less than the threshold¹. There are different rates and bands for different types of property, with separate rates for residential property and for residential property with the Additional Dwelling Supplement¹. The ADS applies to purchases of all relevant residential properties for £40,000 and above, and the rate remains at 8 per cent²¹. Residential rates and bands are maintained at their current level for 2026-27²¹.

If you are at the stage of filing rather than amending, the deadline to submit an LBTT return page covers the 30-day rule, and the under £40,000 page deals with when no return is needed at all.